TW202108488A - Manufacturing method for roll body, and roll body - Google Patents

Abstract

Provided are: a manufacturing method for a roll body, said method making it possible to effectively reduce a level difference caused at a winding start end of a sheet; and such a roll body. One aspect of the present invention provides a manufacturing method for a roll body 10 including a winding core 11 and an elongate sheet 12 that is wound around an outer circumferential surface 11A of the winding core 11, said method including: a step for applying a coating material 18 onto the outer circumferential surface 11A of the winding core 11 along a width direction DR1 of the winding core 11; a step for placing, on the outer circumferential surface 11A, a winding start end 12A in a longitudinal direction DR2 of the sheet 12; and a step for winding the sheet 12 around the winding core 11 and filling at least a first gap 13 with the coating material 18. The application of the coating material 18 or the placement of the winding start end 12A is performed such that the coating material 18 comes into contact with or close to a distal end surface 12A1 located in the longitudinal direction DR2 of the winding start end 12A, and the first gap 13 is located between the winding core 11 and the first winding of the sheet 12 and is in contact with the distal end surface 12A1.

Description

Manufacturing method of roller body and roller body

The present invention relates to a manufacturing method of a roller body and a roller body.

From the viewpoint of manufacturing efficiency, most sheets of film and the like are manufactured together in a certain amount, then wound on the core and stored in the form of a roll. In this type of roll body, a step difference occurs due to the winding start end of the sheet. Specifically, there will be a step difference when the first lap moves to the second lap, and the step will also appear after the second lap. In addition, depending on the type of the sheet, sometimes if this step difference occurs, the sheet will be deformed and cannot be restored to its original state.

At present, the following technology has been proposed: attaching or embedding a buffer tape with high cushioning properties such as urethane resin on the outer peripheral surface of the winding core, and embedding the sheet in the buffer tape, thereby alleviating the above-mentioned level difference (for example, , Refer to Patent Document 1); or use a core with rubber on the outer peripheral surface, and embed the sheet in the rubber to ease the step difference; or set on the outer peripheral surface of the core along the front end of the winding start end of the sheet Technology of cushioning material with elasticity (for example, refer to Patent Document 2). [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Publication No. 2005-75521 [Patent Document 2] JP 2013-199355 A

[The problem to be solved by the invention]

However, the current status quo is that none of the above technologies can effectively alleviate the level difference.

Also, when winding the sheet on the winding core, first, a fixing member such as a double-sided tape is attached to the outer peripheral surface of the winding core to fix a part of the sheet (for example, the winding start end), but there is also There will be a step difference due to the fixed member.

The present invention was completed in order to solve the above-mentioned problems. That is, its purpose is to provide a method for manufacturing a roller body that can effectively alleviate the step difference caused by the winding start end of the sheet, and such a roller body. In addition, the object is to provide a method of manufacturing a roller body that can effectively alleviate the step difference caused by the fixing member, and such a roller body. [Technical means to solve the problem]

The present invention includes the following inventions. [1] A method of manufacturing a roll body, the roll body having a core and a long sheet wound on the outer peripheral surface of the core, the manufacturing method having the following steps: Along the width direction of the core, coating material is applied to the outer peripheral surface of the core, Arranging the winding start end of the sheet in the longitudinal direction on the outer peripheral surface, and Winding the sheet around the core, and filling the coating material at least in the first gap; The coating of the coating material or the arrangement of the winding start end is performed in such a manner that the coating material contacts or approaches the front end surface of the winding start end in the longitudinal direction, and the first gap is located at the The gap between the winding core and the sheet of the first turn and in contact with the front end surface.

[2] A method of manufacturing a roll body, the roll body having a core and an elongated sheet wound around the outer peripheral surface of the core, and the method of manufacturing has the following steps: Arrange the winding start end of the sheet in the longitudinal direction on the outer peripheral surface, The sheet is wound around the core for at least one turn to obtain an intermediate roller body with a first gap, Applying a coating material to the surface of the sheet constituting the outer peripheral surface of the intermediate roll body along the width direction of the core, and After coating the coating material, the sheet is wound around the core again so that the coating material is interposed between the sheets; The first gap is a gap between the core and the sheet of the first turn and is in contact with the front end surface of the winding start end in the longitudinal direction, and the coating material is applied to the intermediate roller body. The first area on the surface of the sheet of the outer peripheral surface corresponding to the first gap.

[3] A method of manufacturing a roll body, the roll body having a core and a long sheet wound on the outer peripheral surface of the core, the manufacturing method having the following steps: A fixing member for fixing a part of the sheet to the core is arranged on the outer peripheral surface of the core along the width direction of the core, and the fixing member has a first extending in the width direction of the core The end surface and the second end surface on the opposite side of the first end surface, Coating the coating material on the outer peripheral surface of the core along the width direction of the core, Fixing a part of the sheet to the winding core through the fixing member, and After coating the coating material and fixing a part of the sheet to the core, the sheet is wound around the core, and the coating material is filled in at least any one of the second gap and the third gap; The coating of the coating material or the arrangement of the fixing member is performed in such a way that the coating material is located on the first end surface or the second end surface side, and the coating material is in contact with or close to the first end surface or the second end surface , Or in such a way that the coating material is located on the first end surface side and the second end surface side, and the coating material is in contact with or close to the first end surface and the second end surface, and the second gap is located in the core A gap between the sheet in the first ring and in contact with the first end surface, and the third gap is a gap located between the winding core and the sheet in the first ring and in contact with the second end surface.

[4] A method of manufacturing a roll body, the roll body having a core and a long sheet wound on the outer peripheral surface of the core, the manufacturing method having the following steps: A fixing member for fixing a part of the sheet to the core is arranged on the outer peripheral surface of the core along the width direction of the core, and the fixing member has a first extending in the width direction of the core The end surface and the second end surface on the opposite side of the first end surface, Through the fixing member, a part of the sheet is fixed to the winding core, The sheet is wound around the core for at least one turn to obtain an intermediate roller body having a second gap and a third gap, Applying a coating material to the surface of the sheet constituting the outer peripheral surface of the intermediate roll body along the width direction of the core, and After coating the coating material, the sheet is wound around the core again; The second gap is a gap between the winding core and the sheet of the first ring and in contact with the first end surface of the fixing member, and the third gap is between the winding core and the sheet of the first ring And in the gap in contact with the second end surface of the fixing member, the coating material is applied to the second area corresponding to the second gap and the third area corresponding to the second gap on the surface of the sheet constituting the outer peripheral surface of the intermediate roller body At least any one of the third areas corresponding to the gap.

[5] The method for manufacturing a roll body according to any one of [1] to [4] above, wherein the coating material has fluidity.

[6] The method for manufacturing a roll body according to any one of [1] to [5] above, wherein the coating material is a curable polymer composition.

[7] The method for manufacturing a roll body according to any one of [1] to [6] above, wherein the coating material contains a coloring material or a luminescent material.

[8] The method for manufacturing a roll body according to any one of [1] to [6] above, wherein the sheet has a resin film.

[9] The method for producing a roll body according to any one of [1] to [7] above, wherein the sheet contains acrylic resin, polyester resin, or cycloolefin polymer resin.

[10] The method for manufacturing a roll body according to [8] or [9] above, wherein the thickness of the sheet is 15 μm or more and 300 μm or less.

[11] The method for producing a roll body according to any one of [1] to [10] above, wherein the sheet is a laminate having a base material and one or more functional layers laminated on the base material.

[12] The method for manufacturing a roll body according to any one of [1] to [11] above, wherein the sheet is used for an optical film, a polarizing plate, or a display device.

[13] A roll body having a core and a long sheet wound on the outer peripheral surface of the core, and having The first gap: located between the core and the sheet of the first turn and contacting the front end surface in the longitudinal direction of the winding start end of the sheet of the first turn in the longitudinal direction, and The first filling part: filling the first gap and extending in the width direction of the core.

[14] The roller body of the above-mentioned [13], which further includes Fixing member: set between the winding core and the sheet of the first turn, having a first end surface extending in the width direction of the winding core and a second end surface opposite to the first end surface, and fixing a part of the sheet to The core, The second gap: located between the winding core and the sheet of the first ring and in contact with the first end surface of the fixing member, The third gap: located between the winding core and the sheet of the first ring and in contact with the second end surface of the fixing member, and At least any one of the second filling part and the third filling part; The second filling part is filled in the second gap and extends in the width direction of the winding core, and the third filling part is filled in the third gap and extending in the width direction of the winding core.

[15] A roll body having a core and a long sheet wound around the outer peripheral surface of the core, and having The first gap: located between the core and the sheet of the first turn and contacting the front end surface in the longitudinal direction of the winding start end of the sheet of the first turn in the longitudinal direction, and The first intermediate part: the first area that corresponds to at least the first gap between the sheets after the first turn, and extends in the width direction of the core.

[16] A roll body having a core and a long sheet wound on the outer peripheral surface of the core, and having Fixing member: set between the winding core and the sheet of the first turn, having a first end surface extending in the width direction of the winding core and a second end surface opposite to the first end surface, and fixing a part of the sheet to The core, The second gap: located between the winding core and the sheet of the first ring and in contact with the first end surface of the fixing member, The third gap: located between the winding core and the sheet of the first ring and in contact with the second end surface of the fixing member, and At least any one of the second filling part and the third filling part; The second filling part is filled in the second gap and extends in the width direction of the winding core, and the third filling part is filled in the third gap and extending in the width direction of the winding core.

[17] A roll body having a core and a long sheet wound around the outer peripheral surface of the core, and having Fixing member: set between the winding core and the sheet of the first turn, having a first end surface extending in the width direction of the winding core and a second end surface opposite to the first end surface, and fixing a part of the sheet to The core, The second gap: located between the winding core and the sheet of the first ring and in contact with the first end surface of the fixing member, The third gap: located between the winding core and the sheet of the first ring and in contact with the second end surface of the fixing member, and At least one of the second intermediary part and the third intermediary part; The second intermediate portion is provided in the second area corresponding to the second gap between the sheets after the first turn, and extends in the width direction of the winding core, and the third intermediate portion is provided in the second area after the first turn The third area between the sheets corresponds to the third gap and extends in the width direction of the core.

[18] The roller body of [13] or [14] above, which further includes a fourth intermediate portion connected to the first filling portion and interposed between the sheet of the first ring and the second Circle between the film.

[19] The roller body of [13] or [14] above, wherein, when there is no fourth piece connected to the first filling portion and between the piece of the first circle and the piece of the second circle In the case of the intermediate portion, the ratio of the length L1 along the longitudinal direction of the sheet in the first filling portion to the thickness T2 at the position in contact with the front end surface of the first filling portion is 90 or more, and When there is the fourth intermediate portion, the sum of the length L1 along the longitudinal direction of the sheet in the first filling portion and the length L2 along the longitudinal direction of the sheet in the fourth intermediate portion The ratio with respect to the thickness T2 of the position in contact with the tip surface in the first filling portion is 90 or more.

[20] The roller body of [19] above, wherein when the fourth intermediate portion does not exist, the ratio of the area S1 to the thickness T2 of the first filling portion is 3.0 or more, and the area S1 includes The area of the area sandwiched between the outer peripheral surface of the core and the surface of the first filling part in the plane of the longitudinal direction of the sheet and the radial direction of the core, and when the fourth intermediate part exists When the ratio of the sum of the area S1 and the area S2 to the thickness T2 of the first filling portion is 3.0 or more, the area S1 is a plane including the longitudinal direction of the sheet and the radial direction of the core. The area of the area sandwiched between the outer peripheral surface of the core and the surface of the first filling portion, and the area S2 is the area of the area sandwiched between the outer peripheral surface of the core and the surface of the fourth intermediate portion.

[21] The roller body of the above-mentioned [17], wherein when the thickness of the second intermediate portion is measured along the longitudinal direction of the sheet, from the fixing member side of the second intermediate portion in the longitudinal direction The ratio of the length L4 from the second front end on the opposite side of the first front end to the position of the maximum thickness T6 of the second intermediate portion to the maximum thickness T6 of the second intermediate portion is 12 or more.

[22] The roll body of the above-mentioned [21], wherein a plane including the longitudinal direction of the sheet and the radial direction of the core is from the second front end of the second intermediate portion to the maximum thickness T6 The ratio of the cross-sectional area S3 of the second intermediate portion of the position to the maximum thickness T6 of the second intermediate portion is 2.5 or more.

[23] The roller body of [15] or [17] above, wherein the sheet has convex portions protruding in the radial direction of the winding core at both end portions extending along the longitudinal direction of the sheet.

[24] The roller body according to any one of [13] to [23] above, wherein the sheet has a resin film.

[25] The roller body according to any one of [13] to [23] above, wherein the sheet contains acrylic resin, polyester resin, or cycloolefin polymer resin.

[26] The roller body of the above-mentioned [24] or [25], wherein the thickness of the sheet is 15 μm or more and 300 μm or less.

[27] The roller body according to [13] above, wherein the first filling portion contains a coloring material or a luminescent material.

[28] The roller body of [14] or [16] above, wherein the second filling portion and the third filling portion each contain a coloring material or a luminescent material.

[29] The roller body of the above-mentioned [15], wherein the first intermediate portion contains a coloring material or a luminescent material.

[30] The roller body of the above-mentioned [17], wherein the second intermediate portion and the third intermediate portion each contain a coloring material or a luminescent material.

[31] The roller body according to the above [13], wherein the first filling part contains a cured product of a curable polymer composition.

[32] The roller body of the above-mentioned [14] or [17], wherein the second filling part and the third filling part each contain a cured product of a curable polymer composition.

[33] The roller body of the above-mentioned [15], wherein the first intermediate portion contains a cured product of a curable polymer composition.

[34] The roller body of the above-mentioned [17], wherein the second intermediate portion and the third intermediate portion each contain a cured product of a curable polymer composition.

[35] The roll body according to any one of [13] to [34] above, wherein the sheet is a laminate having a base material and one or more functional layers laminated on the base material.

[36] The roller body according to any one of [13] to [35] above, wherein the sheet is used for an optical film, a polarizing plate, or a display device. [Compared with the effect of the previous technology]

According to one aspect of the present invention, it is possible to provide a method of manufacturing a roller body that can effectively alleviate the step difference caused by the winding start end of the sheet, and such a roller body. Furthermore, according to other aspects of the present invention, it is possible to provide a method of manufacturing a roller body that can effectively alleviate the step difference caused by the fixing member, and such a roller body.

[First Embodiment] Hereinafter, the roller body of the first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view of the roller body of this embodiment, Fig. 2 is a plan view of a sample used to specify the position of the phase difference in the measurement plane, Fig. 3 is an enlarged view of a part of the roller body of Fig. 1, and Fig. 4 is an explanatory view 1 is a diagram showing the dimensions of each component of the roller body, and FIG. 5 is an enlarged view of the vicinity of the front end of the first filling portion of the roller body in FIG. 1. Fig. 6 is a diagram showing the area R1 and the area R2 in the roller body of Fig. 1, Fig. 9 is a plan view of the roller body used to specify the measurement position of the laser displacement meter, and Fig. 10 is the displacement amount relative to the laser displacement meter based The image diagram of the created position was measured. FIG. 11 is a diagram showing an enlarged part of the image diagram of FIG. 10 for obtaining the areas S1 and S2. Fig. 7, Fig. 8, Fig. 12 to Fig. 16 are enlarged views of a part of another roller body of this embodiment. Figs. 17 to 19 are diagrams schematically showing the manufacturing steps of the roll body of the present embodiment. 20 to 24 are diagrams schematically showing other manufacturing steps of the roller body of the present embodiment.

＜＜＜Roll body＞＞＞ The roll body 10 shown in FIG. 1 includes a winding core 11 and a long sheet 12 wound around the outer peripheral surface 11A of the winding core 11. As shown in FIG. 3, the roller body 10 is further provided with a first filling part 14 which fills the first gap 13 between the core 11 and the sheet 12, and a second gap which fills the second gap between the core 11 and the sheet 12 The second filling part 16 of 15 and the fixing member 17 for fixing a part of the sheet 12 to the core 11. In addition, the roller body 10 is further provided with a fourth intermediate portion 18 provided in connection with the first filling portion 14 and interposed between the first round sheet 12 and the second round sheet 12. Although the roller body 10 shown in FIG. 3 is equipped with the 4th intermediate part 18, the roller body 10 shown in FIG. 7 may not have the 4th intermediate part. The sheet 12 is wound around the winding core 11 by a plurality of turns or more, for example, 2 turns or more.

＜＜Coil Core＞＞ The shape of the winding core 11 is not particularly limited, but from the viewpoint that the sheet 12 can be easily wound, it is preferably cylindrical or cylindrical. The core 11 shown in FIG. 1 is cylindrical. When the winding core is cylindrical, the chuck member of the winding device is inserted into the hole 11B in the width direction DR1 of the winding core 11 to hold the roller body 10. When the winding core is cylindrical, the winding core is provided with a shaft member penetrating the winding core, and by mounting the shaft member in the winding device, the roller body can be held in the winding device.

The width W1 (refer to FIG. 1) of the core 11 is not particularly limited, and may be, for example, 0.1 m or more and 50 m or less. The lower limit of the width W1 of the core 11 can be 0.2m or more, 0.3m or more, 0.7m or more, 1.0m or more, 1.5m or more, or 2m or more, and the upper limit can be 30m or less, 20m or less, 10m or less, 7m or less, 5m or less , 3.5m or less, 3m or less, or 2.5m or less. The width of the core can be obtained by the following method, that is, measure the width of the core at 10 locations, remove the maximum and minimum values from the measured widths at 10 locations, and obtain the arithmetic average of the widths of the remaining 8 locations value.

The outer diameter of the core 11 is not particularly limited, and may be, for example, 30 mm or more and 8000 mm or less. The lower limit of the outer diameter of the core 11 can be 90mm or more or 100mm or more, and the upper limit can be 5000mm or less, 3500mm or less, 2000mm or less, 1000mm or less, 700mm or less, 500mm or less, 350mm or less or 300mm or less. The outer diameter of the core can be obtained by the following method, that is, the outer diameter of the core is measured at 10 locations, and the maximum and minimum values are removed from the measured outer diameters of the 10 locations, and the remaining 8 locations are obtained. The arithmetic mean of the diameter.

When the winding core 11 is cylindrical, the inner diameter of the winding core 11 is not particularly limited, and may be 20 mm or more and 7500 mm or less. The lower limit of the inner diameter of the core 11 can be 50mm or more, 80mm or more, 120mm or more, or 150mm or more, and the upper limit can be 4500mm or less, 3000mm or less, 1500mm or less, 900mm or less, 600mm or less, 400mm or less, 250mm or less or 200mm or less. The inner diameter of the winding core can be obtained by the following method, that is, measuring the inner diameters of 10 winding cores, and removing the maximum and minimum values from the measured inner diameters of the 10 locations to find the remaining 8 locations The arithmetic mean of the diameter.

Sometimes, in order to alleviate the step difference caused by the winding start end of the sheet, the position of the winding start end of the sheet is lower than the thickness of the sheet to form a step on the part of the outer peripheral surface of the core that is in contact with the sheet. However, such a level difference is not formed in the part where the sheet 12 of the outer peripheral surface 11A of the core 11 contacts. By using the core 11 having no step difference in the above-mentioned portion of the outer peripheral surface 11A, it is also possible to adapt to sheets 12 of various thicknesses. In this specification, "the part that is in contact with the sheet on the outer peripheral surface of the core is not formed with a step" means that the central part of the core and the distance from the central part in the width direction of the core are 100 mm or more of the turns In each of them, there is no part with a height difference of 3 μm or more. In addition, the part where the sheet 12 of the outer peripheral surface 11A of the winding core 11 is in contact may be formed with a step difference of less than 3 μm as described above.

The material constituting the winding core 11 is not particularly limited. As the material constituting the winding core 11, for example, paper, plastic, metal, or the like can be cited. Paper also includes paper impregnated with resin. Examples of plastics include fiber reinforced plastics (FRP/Fiber Reinforced Plastics), polyolefins such as polyethylene (PE) or polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), and acrylonitrile-butadiene Ethylene-styrene copolymer (ABS), phenol resin, nylon, etc. Among these, for example, in the case of optical coating processing, from the viewpoint of weight, processability, and strength, fiber reinforced plastic (FRP) is preferred. As fiber reinforced plastics, for example, a body composed of epoxy resin or phenol resin mixed with fibers such as glass, epoxy, polyester, carbon, and polyaramide can be cited. Examples of metals include iron, stainless steel (SUS), aluminum, and the like.

＜＜片＞＞ The sheet 12 is a long strip. Specifically, the sheet 12 has a very thin thickness and a very long length with respect to the width.

The width W2 (refer to FIG. 1) of the sheet|seat 12 is not specifically limited, For example, it can be 0.1m or more and 50m or less. The "width of the sheet" in this manual means the length of the sheet in the short-side direction (the width direction of the core). The lower limit of the width W2 of the sheet 12 can be 0.2m or more, 0.3m or more, 0.5m or more, 1.0m or more, or 2.0m or more, and the upper limit can be 30m or less, 20m or less, 10m or less, 7m or less, 5m or less, 3.5m or less Or less than 3m. The width of the slice can be obtained by the following method, that is, measuring the width of 10 slices, removing the maximum and minimum values from the measured width of 10 points, and obtaining the arithmetic average of the widths of the remaining 8 points.

The width W2 of the sheet 12 is preferably smaller than the width W1 of the core 11. Thereby, the sheet 12 can be surely held by the winding core 11.

The length of the sheet 12 is, for example, 20 m or more and 10,000 m or less. The "length of the sheet" in this manual means the length of the sheet in the longitudinal direction. The lower limit of the length of the sheet 12 can be 30 m or more, 40 m or more or 50 m or more, and the upper limit can be 9000 m or less or 8000 m or less.

The thickness of the sheet 12 is not particularly limited, and may be, for example, 3 μm or more and 600 μm or less. The lower limit of the thickness of the sheet 12 may be 10 μm or more, 15 μm or more, 20 μm or more, or 30 μm or more, and the upper limit may be 500 μm or less, 400 μm or less, 300 μm or less, 200 μm or less, 110 μm or less, or 80 μm or less. When it is preferably a thin film according to the application, it is not limited to this, and it is preferably 3 μm or more but less than 50 μm, or even 40 μm or less. The thickness of the sheet can be obtained by the following method, that is, measuring the thickness of 10 sheets, removing the maximum and minimum values from the measured thickness of 10, and obtaining the arithmetic average of the thickness of the remaining 8 places. In addition, the above-mentioned level difference is not easy to occur when the thickness of the sheet is thick, but the thinner it is, the more significant it is. The present invention is particularly effective when the thickness of the sheet is thin (80 μm or less, less than 50 μm or even 40 μm or less).

When the sheet 12 contains, for example, acrylic resin, polyester resin (especially polyethylene terephthalate), or cycloolefin polymer resin, the thickness of the sheet 12 is preferably 15 μm or more and 300 μm or less. When the sheet 12 contains any of these resins, the thinner the sheet thickness, the more significant the above-mentioned level difference, but if the sheet thickness is made extremely thin, the above-mentioned level difference tends to become smaller. For example, when there is a heating step above 50°C in the subsequent step, if it is a thin sheet, the deformation caused by the above-mentioned level difference can sometimes be eliminated. However, if the thickness of the sheet is a certain thickness (for example, 15 μm or more), even if the heating step is performed, the above-mentioned deformation may not be eliminated. Therefore, it is particularly effective when the thickness of the sheet 12 is 15 μm or more. Moreover, when the sheet 12 contains any of these resins, if the thickness of the sheet is too thick, a large amount of coating material will be required. Therefore, from the viewpoint of cost reduction, the thickness of the sheet 12 is preferably 300 μm or less. In addition, when any of these resins are contained, if the thickness exceeds 300 μm, the level difference may not easily occur. When the sheet 12 contains any of these resins, the lower limit of the thickness of the sheet 12 is more preferably 20 μm or more, 35 μm or more, or 50 μm or more, and the upper limit of the thickness of the sheet 12 is more preferably 250 μm or less, 200 μm or less, or 150 μm or less Or less than 100μm. When any of these resins are contained, it is particularly effective at a thickness that is not too thin and not too thick.

In addition, when the fixing member 17 is provided, since the sheet 12 is arranged on the fixing member 17, the total thickness of the sheet 12 and the fixing member 17 affects the step caused by the winding start end of the sheet. Therefore, if the thickness of the fixing member 17 is assumed to be 3 μm or more and 10 μm or less, for example, since the thickness of the sheet 12 is as thin as possible, the upper limit is preferably 130 μm or less, and more preferably 90 μm or less. In addition, when the fixing member is an adhesive tape, if the thickness of the fixing member exceeds 15% of the thickness of the sheet, it is more likely to have an effect on the above-mentioned level difference. Therefore, the thickness of the sheet 12 is preferably not too thin, and the lower limit of the thickness of the sheet 12 is preferably 20 μm or more or 35 μm or more, for example.

As a sheet, a film, metal foil, paper, etc. are mentioned, for example. The film may be a resin film, for example. When the resin film is used for applications that require light transmittance (for example, optical film applications), the resin film preferably has light transmittance. The resin constituting such a resin film is not particularly limited as long as it has translucency, and examples include acrylic resins, polyolefin resins (polyethylene resins, polypropylene resins, cycloolefin polymer resins), Polycarbonate resins, polyacrylate resins, polyester resins (polyethylene terephthalate, polyethylene naphthalate, etc.), aromatic polyether ketone resins, polyether turrets (Polyether sulfone) resin, cellulose acetate resin (for example, triacetyl cellulose resin), polyimide resin, polyamide-imide resin, polyamide resin or A mixture of two or more of these resins, etc. Among these, resin films with relatively high flexibility include acrylic resins, polyolefin resins, polyester resins, cellulose acetate resins, polyimide resins, and polyamide-imide resins. A resin film made of a resin or polyamide resin is easily deformed due to a step at the end of the winding start of the sheet or a step at the fixing member, so the technique of the present invention is effective. In recent years, it is preferred to use low-moisture-permeable resins with less deformation and low water permeability for large-scale displays. In the case of a large-scale display, since most of the film width will become a product as a whole, even if it is a part, if there is distortion caused by the step difference, the whole must be discarded. For example, acrylic resins, polyester resins, and cycloolefin polymer resins are suitable for large displays, but according to the technology of the present invention, the deformation caused by the step difference can be well prevented, and the mass productivity can be improved. Therefore, the technology of the present invention is particularly effective for sheets made of such resins. In addition, when thinness is required in the final product, for example, when a film with a thickness of less than 50 μm is used, the technique of the present invention is applicable regardless of the film of any material.

When the sheet 12 is used for an optical film, and particularly when it contains an acrylic resin or a cycloolefin polymer-based resin, the in-plane phase difference (retardation: Re) of the sheet 12 is preferably 10 nm or less. When the in-plane phase difference Re of the sheet 12 is 10 nm or less, the optical distortion is small, and it can be said that the sheet 12 has almost no residual stress during manufacturing. That is, the in-plane phase difference Re of the sheet 12 is 10 nm or less. Since the polymer in the sheet 12 is uniform, when the sheet 12 is made into a long roll, it is not easy to become the sheet 12 due to some step difference. The new level difference caused by the internal polymer state is better. Regarding the upper limit of the in-plane retardation Re of the sheet 12, from the viewpoint that color unevenness or blackout, which is a problem when used in combination with polarizers in display applications, is less likely to occur, it is more preferably 8 nm or less or 4 nm or less. In addition, in the case of acrylic resin, if it is used for optical purposes, the phenomenon of whitening after bending like the conventional acrylic resin film will not occur, and the haze value (total haze value) is preferably as small as 1 % Or less or 0.5% or less.

In addition, when the sheet 12 is used for optical film and contains polyester resin, the polymer in the sheet 12 is uniform, and it is more difficult to generate a new level difference due to the state of the polymer in the sheet 12, which is preferable. . When the sheet 12 contains a polyester resin, it needs to be stretched in order to obtain physical strength. Therefore, in order to make the polymer state as uniform as possible, it can be manufactured by sequential or simultaneous biaxial stretching at approximately the same magnification in the vertical and horizontal directions. As a result, a polyester-based resin-containing sheet having a smaller in-plane retardation than before can be obtained. The small in-plane retardation means that the thickness of the sheet is 10 μm to 90 μm, and the in-plane retardation is 1500 nm or less, preferably 1200 nm or less, more preferably 1000 nm or less, and even more preferably 800 nm or less. In addition, in order to improve physical properties such as elastic modulus and tear strength of the biaxially stretched polyester as a plastic film, it is preferable that the in-plane retardation is not too small, and it is preferably 200 nm or more, and more preferably 400 nm or more.

In addition, in order to further improve the physical properties, it is preferable to also consider the balance between the birefringence in the in-plane direction and the birefringence in the film thickness direction. As its index, it has the Nz coefficient. The Nz coefficient is affected by the crystallinity or orientation inside the film, so it is related to the characteristics of the entire sheet. The Nz coefficient is usually 2 to 4 in the case of, for example, polyethylene terephthalate, but especially when it is made into a long roll, it is difficult to generate a new level due to the state of the polymer in the sheet due to some level difference. In terms of difference, it is preferably 5 or more, more preferably 8 or more, and most preferably 10 or more. The upper limit of the Nz coefficient is about 80, preferably 70 or less, and most preferably 50 or less.

The in-plane retardation (Re) is determined by the refractive index nx in the direction of the maximum refractive index in the plane of the sheet, that is the slow axis direction, and the refractive index ny in the direction orthogonal to the slow axis direction in the plane, that is the fast axis direction. And the thickness t (nm) of the sheet is expressed by the following formula (1). From the following formula (1), it can be seen that the in-plane phase difference is small and the degree of alignment is low, so there is a tendency to improve the bending resistance. The in-plane phase difference (Re) can be measured by, for example, the product name "RETS-100" manufactured by Otsuka Electronics Co., Ltd., and the product names "KOBRA-WR" and "PAM-UHR100" manufactured by Oji Measuring Instruments Co., Ltd. In-plane phase difference (Re)=(nx－ny)×t　　…(1)

The Nz coefficient is expressed by the following formula (2) by the refractive index nz in the thickness direction of the sheet, the above nx, and the above ny. Nz coefficient = (nx－nz)/(nx－ny)　　…(2)

When using RETS-100 to measure the above Re, the measurement can be carried out in the following order. First, in order to stabilize the light source of RETS-100, leave it for more than 60 minutes after turning on the light source. Then, the rotating analyzer method is selected, and the θ mode (angle direction phase difference measurement mode) is selected. By selecting this θ mode, the stage becomes an inclined rotating stage.

5mm ・傾斜角度範圍：－40°～40° ・測定波長範圍：400nm～800nm ・樣品之平均折射率（例如，於PET之情形時，為N＝1.617，又，於丙烯酸樹脂膜之情形時，為1.5。） ・厚度：使用SEM或光學顯微鏡另外測得之厚度Next, enter the following measurement conditions into RETS-100. (Measurement conditions) ・Delay measurement range: Rotating analyzer method ・Measurement point diameter:

5mm ・Inclination angle range: -40°～40° ・Measurement wavelength range: 400nm～800nm ・The average refractive index of the sample (for example, in the case of PET, N=1.617, and in the case of acrylic resin film, 1.5.) ・Thickness: the thickness separately measured by SEM or optical microscope

Then, without setting the sample under this device, get background information. The device is set to a closed system, and this action is implemented every time the light source is turned on.

Then, set the sample on the stage in the device. The shape of the sample can be any shape, for example, it can be rectangular. The size of the sample can be 50mm×50mm. When there are multiple samples, all must be set in the same direction. For example, in order to set all samples in the same direction, it is better to mark all samples in advance.

After setting up the sample, in an environment with a temperature of 23±5°C and a relative humidity of 50±20%, the stage is rotated 360° on the XY plane to measure the fast axis and the slow axis. After the measurement is over, select the slow axis. Then, with the slow axis as the center, the stage is tilted to the set angle range, and measurement is performed at the same time, and the data (Re) of the set tilt angle range and the set wavelength range are obtained every 10°. The in-plane phase difference Re is set to a value when measured with light having an incident angle of 0° and a wavelength of 589 nm. The in-plane phase difference Re is measured at 5 points with different positions. Specifically, first, as shown in FIG. 2, two orthogonal virtual lines IL1 and IL2 passing through the center A1 of the sample SA are drawn. If the virtual lines IL1 and IL2 are drawn, the sample is divided into 4 blocks. Then, set a point equidistant from the center A1 in each block, a total of 4 points A2 to A5, and measure at a total of 5 points of the center A1 and points A2 to A5. Then, remove the maximum and minimum values from the measured values at 5 points, and use the arithmetic average of the remaining 3 points as the in-plane phase difference Re.

The sheet 12 may have a single-layer structure, or may have a multilayer structure in which two or more layers are laminated. Specifically, the sheet 12 may be a base material monomer or a functional layer monomer, and may be, for example, a laminate in which one or more functional layers are formed on the base material (for example, an optical laminate). The "functional layer" in this manual refers to a layer intended to perform certain functions in the laminate. Specifically, as the functional layer, for example, a base layer, a hard coat layer, an impact absorption layer, an anti-glare layer, an antistatic layer, a conductive layer, a heat dissipation layer, an ultraviolet absorption layer, a special wavelength absorption layer, a special wavelength transmission layer, Color reproducibility improvement layer, liquid crystal layer, retardation adjustment layer, viewing angle adjustment layer, reflective layer, colored layer, anti-reflection layer (high refractive index layer, low refractive index layer), antifouling layer, water repellent layer, oil repellent layer, etc. Or a combination of these, etc. The "functional layer" in this manual can be a single-layer structure or a multi-layer structure. However, in this specification, the "functional layer" is a layer that also exists when the sheet 12 is used, and does not include a release liner that will be peeled off when used. If there is a release liner on the sheet, defects are likely to occur, and a new level difference different from the above level is likely to occur. Assuming that the sheet 12 is provided with a release liner, it is wound around the core 11 in a state where the release liner is peeled off.

The use of the sheet 12 is not particularly limited, and examples thereof include optical use (optical film use, polarizing plate use, display device use), construction tool use, automobile interior decoration use, battery component use, food packaging material use, and the like. Among these, if the optical film has a step caused by the winding start end of the sheet or a step caused by the fixing member, not only the appearance but also the light transmittance may be affected. Therefore, the present invention The technology is particularly effective for optical applications.

The sheet 12 includes a winding start end 12A (refer to FIG. 3) and a winding end end 12B (refer to FIG. 1 ). In the roll body 10, the winding start end 12A is located on the inner side (winding core 11) side than the winding end 12B. In the roll body 10, as shown in FIG. 3, the front end surface 12A1 of the winding start end 12A in the longitudinal direction DR2 is in a cross section along the longitudinal direction DR2 of the sheet 12 and the radial direction DR3 of the core 11 , It is substantially aligned with the second end surface 17B of the fixing member 17 described later. The term "substantially aligned" in this specification means that the distance between the front end surface 12A1 and the second end surface 17B in the longitudinal direction DR2 of the winding start end 12A is ±20 of the width W3 of the fixing member 17 (refer to FIG. 4) % Within. In addition, the above-mentioned "+" means that the front end surface 12A1 protrudes from the second end surface 17B, and the above-mentioned "-" means that the front end surface 12A1 is retracted from the second end surface 17B (that is, the second end surface 17B protrudes from the front end surface 12A1).

＜＜Fixed member＞＞ The fixing member 17 is used to fix a part of the sheet 12 to the outer peripheral surface 11A of the winding core 11. The fixing member 17 extends in the width direction DR1 of the winding core 11. Thereby, a part of the sheet 12 can be fixed to the outer peripheral surface 11A of the winding core 11 along the width direction DR1 of the winding core 11.

The fixing member 17 has a first end surface 17A and a second end surface 17B on the opposite side. Both the first end surface 17A and the second end surface 17B extend in the width direction DR1 of the winding core 11.

In FIG. 3, the fixing member 17 is in close contact with the outer peripheral surface 11A of the winding core 11 and the winding start end 12A of the sheet 12, and the winding start end 12A of the sheet 12 is fixed to the outer peripheral surface 11A of the winding core 11. In addition, if it is the first turn of the sheet 12, the sheet 12 may be fixed to a portion other than the winding start end 12A. In FIG. 3, the surface of the fixing member 17 is all in close contact with the winding start end 12A, but as shown in FIG. 8, if the winding start end 12A is fixed to the fixing member 17 to the extent that no problem occurs during winding For example, when the winding start end 12A is fixed to the extent that it does not peel off from the fixing member 17 during winding, the first filling portion 14 may enter between the winding start end 12A and the fixing member 17.

The fixing member 17 is not particularly limited, and an adhesive member such as an adhesive member or a double-sided tape can be mentioned. The fixing member 17 may have elasticity (cushioning properties). Adhesive members are those that have adhesiveness on both sides.

The width W3 (refer to FIG. 4) of the fixing member 17 is preferably 5 mm or more and 100 mm or less. If the width W3 of the fixing member 17 is 5 mm or more, a part of the sheet 12 can be reliably fixed to the outer peripheral surface 11A of the core 11, and if it is 100 mm or less, the sheet 12 can be folded without causing wrinkles. 12 Winding. The "width of the fixing member" in this specification means the distance from the first end surface to the second end surface. The lower limit of the width W3 of the fixing member 17 is preferably 10 mm or more, 20 mm or more, or 30 mm or more, and the upper limit is preferably 50 mm or less or 40 mm or less.

The thickness of the fixing member 17 is preferably 3 μm or more and 600 μm or less. If the thickness of the fixing member 17 is 3 μm or more, a part of the outer peripheral surface 11A of the winding core 11 can be reliably fixed, and if it is 600 μm or less, the deformation of the sheet 12 can be more suppressed. The lower limit of the thickness of the fixing member 17 is preferably 5 μm or more, 10 μm or more, or 20 μm or more, and the upper limit is preferably 200 μm or less, 100 μm or less, or 50 μm or less. The thickness of the fixing member can be obtained by the following method: measuring the thickness of 10 fixing members, and obtaining the arithmetic average of the thickness of the 10 positions.

<The first gap> The first gap 13 is a gap in contact with the front end surface 12A1 in the longitudinal direction DR2 (see FIG. 3) of the winding start end 12A. Specifically, the first gap 13 shown in FIG. 3 is the outer peripheral surface 11A of the winding core 11, the back surface 12C of the first turn of the sheet 12, the front end surface 12A1 of the winding start end 12A, and the second end surface 17B of the fixing member 17 The enclosed gap. When the fixing member 17 is not provided, the first gap is the gap surrounded by the outer peripheral surface of the winding core, the back surface of the first turn of the sheet, and the end surface before the winding start end.

The first gap 13 is a gap in contact with the front end surface 12A1, and is also a gap located between the winding core 11 and the first turn of the sheet 12 and in contact with the second end surface 17B, so it is also a third gap described later.

＜Second gap＞ The second gap 15 is a gap in contact with the first end surface 17A of the fixing member 17. Specifically, the second gap 15 shown in FIG. 3 is a gap surrounded by the outer peripheral surface 11A of the winding core 11, the back surface 12C of the sheet 12 of the first turn, and the first end surface 17A of the fixing member 17.

＜The first filling part＞ The first filling portion 14 is filled in the first gap 13. That is, the first filling portion 14 is in contact with the outer peripheral surface 11A of the winding core 11, the back surface 12C of the first turn of the sheet 12, the front end surface 12A1 of the winding start end portion 12A, and the second end surface 17B of the fixing member 17. In addition, when the fixing member 17 is not provided, the first filling portion is in contact with the outer peripheral surface of the winding core, the back surface of the first turn of the sheet, and the front end surface of the winding start end. The "filling" in this specification means a state where the gap is almost buried by the material constituting the filling portion. However, there may be voids (such as bubbles) inside the filling part.

The sheet 12 has an effective area used as a product and an effective area on both sides of the effective area located in the short-side direction of the sheet 12 and an ineffective area that is not used as a product, and the first filling portion 14 exists at least in the effective area. Since the effective area is an area used as a product, the first filling portion 14 preferably exists over the entire width of the effective area in the width direction DR1 of the core 11. If the first filling portion 14 exists in the effective area, it may also exist in the ineffective area. However, if the first filling portion 14 exists in the ineffective area, the first filling portion 14 may protrude from the sheet 12. The ineffective area is originally an area that is not used as a product, and there is no need to relax the above-mentioned level difference, so the first filling part 14 may not exist in the ineffective area. The ineffective area will also vary depending on the purpose of the sheet or the width of the sheet, but it is usually an area within 10mm-30mm from both ends in the short-side direction of the sheet to the inside. When the first filling portion 14 exists in the non-effective area, the first filling portion 14 may exist at both ends of the sheet in the short-side direction. However, from the viewpoint of suppressing protrusion, it is preferable to exist from these ends toward the sheet. The central part is at a distance of 1mm or more (preferably 5mm or more, more preferably 10mm or more).

The edge thickness T1 of the tip portion 14A on the side of the separation position P1 where the sheet 12 of the first turn in the first filling portion 14 is separated from the core 11 (refer to FIGS. 4 and 5). If the thickness is thick, it may be caused by the thickness. There is a risk of forming a new level difference, so it is better to be thinner. In addition, although it will be described later, depending on the purpose, the edge thickness T1 may be present to a certain degree rather than not present. The edge thickness T1 is preferably 50 μm or less, for example. In terms of shortening the strain relief length (the distance from the winding start end 12A to the point where the deformation due to the step difference at the winding start end 12A cannot be recognized), the edge thickness T1 is more preferably 30μm or less and 20μm or less , 10μm or less, 5μm or less, and 2μm or less. As the level difference at the end of the winding start is relaxed, the deformation of the sheet due to this level difference is relaxed, so the strain relief length becomes shorter. The "deformation relaxation length" in this manual is used in the meaning of the length until the deformation of the sheet due to the step at the end of the winding is reduced, and sometimes it may not be recognized that it is caused by the fixing member. The meaning of the length up to the deformation of the sheet caused by the step difference is used. When the strain relief length is used so that the length of the sheet deformation caused by the step difference of the fixing member cannot be recognized, the strain relief length is the length from the winding start end 12A to the unrecognizable length due to the fixing member 17 The distance to the point where the step is deformed. The deformation relaxation length is preferably short, and specifically, it is preferably 100 m or less, 75 m or less, 60 m or less, 50 m or less, or 35 m or less, 20 m or less, or 15 m or less. In addition, if the strain relief length is 75m or less, there will be more portions where the deformation of the sheet cannot be recognized, which is good. Although the deformation relaxation length is the length until the deformation of the sheet caused by the step difference cannot be recognized as described above, whether there is a step difference is judged as follows. First, in an indoor environment above 800Lux and below 2000Lux, the white light source tube (white LED lamp, white fluorescent lamp, etc.) is mapped to the long strip, and the contour line of the white light source tube mapped to the film is compared to the film When the other part has a skewed part, it is judged that there is a step difference, and the part in the periphery with a step difference that can be judged as the contour line of the mapped white light source tube is the same as the other part of the sheet is judged as no step. difference. The white light source tube is arranged such that the long side direction of the white light source tube is along the long side direction of the sheet. The length of the white light source tube can also be changed according to the width and length of the film. Specifically, the length of the white light source tube is preferably set to reach the length of the part where there is a step difference and the part where there is no step difference in the film. In this way, it is easy to know where there is a step difference. Moreover, if the observation environment is the above-mentioned brightness, the white light source tube itself may be lit or not lit. When observing, it is important that the white light source tube is mapped to the sheet so that its outline can be seen. Therefore, as the observation condition, it is necessary to appropriately select the one that can clearly see the outline of the white light source tube. For example, when the outline of the white light source tube is easier to be seen on the back of the sheet compared to the surface of the sheet, the white light source tube can also be mapped to the back of the sheet to confirm whether there is a step difference. Specifically, for example, in the case of a laminate in which an anti-glare layer is laminated on the surface side of a base material and a functional layer that is difficult to map on a white light source tube, it may be difficult to confirm whether there is a step when viewed from the side of the anti-glare layer. . Therefore, in this case, the white light source tube can be mapped to the back side of the base material on which the anti-glare layer is not laminated to confirm whether there is a step difference. In addition, this judgment can be used even for a roll body for various purposes, such as a laminated body in which one or more functional layers are laminated on a base material, or a laminated body formed by sticking this to a polarizer. For example, when an anti-glare layer is laminated as a functional layer on a base material, the uneven shape of the anti-glare function will be destroyed by pressure in the part where there is a step, and the shading and other coloring can be seen. Be judged. Also, when various functional layers are laminated, and the white light source tube is difficult to map to the recognizable side of the roller body or the opposite surface, as described above, due to the shape change, the coloration different from other parts due to shadows can be seen. It can be judged by this.

In addition, when the sheet 12 is a film having a thickness of 3 μm or more but less than 50 μm, the thicker thickness is likely to be affected by the step difference caused by the winding start end 12A, so when using this kind of film In this case, the edge thickness T1 is preferably 10 μm or less, and from the viewpoint of minimizing the aforementioned deformation relaxation length, it is more preferably 7 μm or less, 5 μm or less, and 1 μm or less.

From the viewpoint of making the above-mentioned deformation relaxation length the shortest, the edge thickness T1 is preferably the above-mentioned thickness, but the surface of the core may be subjected to surface finishing, and there may be irregularities. In the front end of the first filling part, since the material constituting the first filling part is embedded along the unevenness, there will be a part where the edge thickness T1 exists and a part where the edge thickness T1 does not exist, and there will be unevenness. The fear. However, if the edge thickness T1 is thin, even if such unevenness is assumed to occur, there is no actual damage. Therefore, when unevenness occurs, the edge thickness T1 is preferably thinner. Specifically, for example, the edge thickness T1 is preferably 15 μm or less, 10 μm or less, 5 μm or less, and 1 μm or less.

On the other hand, there is also an effect achieved by the presence of the edge thickness T1. For example, the core is mostly reused after the roll body is used. Therefore, secondary workability is required for the winding core. The secondary workability is to remove the filling part in contact with the winding core, such as the first filling part, from the winding core, or to remove it by washing or wiping off, thereby removing the winding core. Core reuse. Therefore, for example, it is preferable that the 1st filling part 14 is not attached to the winding core 11 as mentioned later. In addition, in the portions where the first filling portion 14 is in contact with the core 11 and the sheet 12, respectively, it is preferable that the sheet 12 can be cleanly peeled off from the first filling portion 14. If it is assumed that when the sheet 12 is peeled off from the first filling part 14, the first filling part 14 is cohesively broken, and it may be difficult to remove all the first filling part 14 from the winding core 11 cleanly. On the other hand, if the edge thickness T1 is present, it becomes a trigger for peeling the sheet 12, so from the viewpoint of secondary workability, it is preferable to make the edge thickness T1 barely exist. For example, from the viewpoint of secondary workability, the edge thickness T1 is preferably set to 5 μm or more. The edge thickness T1, the preferred thickness will vary with the material of the core or sheet, and the edge thickness T1 can also be 1.5 μm or more and 5 μm or more. Regarding the upper limit of the edge thickness, since a new step may be formed due to the thickness, it is preferably 30 μm or less.

The edge thickness T1 can be measured using a scanning optical interference surface profile measuring machine. Examples of such a surface shape measuring machine include the "New View" series manufactured by SEG.

Specifically, a scanning optical interference type surface profile measuring machine (product name "New View 7300", manufactured by SEG) can be used to obtain the edge thickness T1 in the following manner. First, if all the sheets are discharged one after another, the first filling portion 14 may adhere to the sheet 12 side and peel off from the core. When the first filling portion 14 is attached to the side of the sheet 12 that is successively discharged, one or more samples including the front end 14A of the first filling portion 14 and having a size of 0.5 mm or more are obtained from the sheet. In addition, if the size of the sample is 0.5mm square or more, it is not limited to a square, and it may be a rectangle (for example, 2mm×5mm). The sample is one that includes the first filling part 14 and cuts out any part where dirt, fingerprints, and the like are not attached. Then, the edge thickness T1 of the first filling portion 14 was measured under the following measurement conditions. The edge thickness T1 can be obtained by the following method, that is, measuring the edge thickness at 10 locations, removing the maximum and minimum values from the measured thickness at 10 locations, and obtaining the arithmetic average of the thicknesses at the remaining 8 locations. (Measurement conditions) ・Objective lens: 10 times ・Zoom: 1 times ・Measurement area: 2.17mm×2.17mm ・Scan length: 5μm ・Minimum modulus (min mod): 0.015

The thickness T2 of the first filling portion 14 at the position in contact with the front end surface 12A1 (refer to FIG. 4) is preferably thicker than the total thickness of the fixing member 17 and the sheet 12 when the fixing member 17 is present. When the fixing member 17 is not present, it is thicker than the thickness of the sheet 12. By setting the thickness T2 to such a thickness, it is possible to more effectively alleviate the step difference caused by the winding start end 12A. However, if the thickness T2 is too thick, although the step difference caused by the winding start end 12A can be alleviated, the winding of the sheet 12 may be adversely affected. Therefore, for example, when the thickness of the sheet 12 is 50 μm or more and 200 μm or less, the thickness T2 is preferably 52 μm or more and 220 μm or less, more preferably 52 μm or more and 150 μm or less, and when the thickness of the sheet 12 is 3 μm or more but not When it is 50 μm, the thickness T2 is preferably 50.5 μm or more and 100 μm or less.

The thickness T2 of the first filling portion 14 at the position in contact with the front end surface 12A1 can be measured in the following manner. The thickness T2 may be different in the case where the fourth intermediate portion 18 exists and the case where the fourth intermediate portion 18 does not exist, and the measuring method is different. When the fourth intermediate portion 18 is not present, a laser displacement meter or a stereo microscope can be used for measurement, and when the fourth intermediate portion 18 is present, a stereo microscope can be used for measurement. The measurement of thickness T2 using a laser displacement meter or a stereo microscope is set to be performed under an environment with a temperature of 23±5°C and a relative humidity of 50±20%.

Using a laser displacement meter to measure the thickness T2 can be done in the following way. The following measurement method uses the reflection of laser light, so it is particularly effective when the sheet 12 is transparent and the first filling part is opaque (for example, when it is colored). First, prepare a jig and a laser displacement meter (for example, product name "LK-G30", manufactured by Chines Co., Ltd.) for rotating the roller body 10, and arrange them at predetermined positions. The jig is inserted into the hole 11B in the width direction DR1 of the winding core 11 and is configured to rotatably hold the roller body 10. In addition, although the LK-G30 is used as the laser displacement meter, even if it is not the LK-G30, the follow-up type equivalent laser displacement meter can also be used.

The laser displacement meter is a device that has a laser source and a light-receiving element, and the light-receiving element receives the laser light irradiated from the laser source and reflected on the surface of the first filling part 14, and the light-receiving position of the light-receiving element is determined by the light-receiving element. Can measure displacement.

Three laser displacement meters are arranged above the roller body 10 to irradiate laser light toward the surface of the roller body 10. The configuration location of the laser displacement meter is set as follows. First, as shown in FIG. 9, the first position B1 and the second position B2 that divide the width of the sheet 12 into three equal parts are determined. The first position B1 is located on the first end 12G1 side of the short side direction of the sheet 12 (the width direction DR1 of the core 11), and the second position B2 is located on the second end 12G2 side opposite to the first end 12G1. Then, the first laser displacement meter is arranged so that the laser light is irradiated to the midpoint C1 between the first position B1 and the first end 12G1, and the second laser displacement meter is arranged so that the laser light is irradiated to the first position B1 and the second point C1. 2 The middle point C2 of the position B2, and the third laser displacement meter is arranged to irradiate the laser light to the middle point C3 of the second position B2 and the second end 12G2.

Then, the roller body 10 is attached to the jig, and the sheet 12 is successively discharged from the roller body 10 until the first filling portion 14 is exposed. Then, with the first filling portion 14 exposed, the winding core 11 is rotated at a rotation speed of 30 mm/s, and the displacement is continuously measured with a laser displacement meter at a sampling cycle of 200 μs, and the position with the horizontal axis is obtained ( mm), the vertical axis is the chart of displacement (mm) (refer to Figure 10). This measurement is performed from the front end 14A of the first filling portion 14 toward the position in contact with the front end surface 12A1. In this measurement, the reference height (the displacement 0mm line) is the height of the core 11, and the reference height is the same as the first The difference in the displacement of the filling portion 14 is the thickness of the first filling portion 14. In this graph, one scale on the horizontal axis is 5 mm, and one scale on the vertical axis is 0.02 mm.

In this graph, at the location where the first filling portion 14 exists, the displacement amount rises from the tip portion 14A, but after the position in the first filling portion 14 that is in contact with the tip surface 12A1, the displacement amount drops sharply. Therefore, find the position E1 on the displacement curve where the displacement begins to drop sharply on the graph. Then, by calculating the difference between the displacement of the 0 mm line and the displacement of the position E1, the thickness T2 of the position in contact with the front end surface 12A1 of the first filling portion 14 is determined.

Using a stereo microscope to measure the thickness T2 can be carried out in the following manner. First, the portion including the winding start end portion 12A, the first filling portion 14 and the second turn of the sheet 12 is taken out and fixed so that the portion is not damaged. Then, the cross section of the fixed part is polished, and the thickness T2 of the first filling part 14 is measured with a stereo microscope (for example, product name “Digital microscope VHX-7000”, manufactured by Chines Co., Ltd.). In addition, although the Digital microscope VHX-7000 is used as a stereo microscope, even if it is not VHX-7000, a stereo microscope equivalent to the follow-up model can be used.

The sheet 12 extends at both ends 12G in the longitudinal direction DR2 (refer to FIG. 1). Since it is a part that is not used as a product, the length of the first filling part 14 in the width direction DR1 of the core 11 is the length of the roll body 10 Above the effective area for commercialization, it can also be smaller than the width W2 of the sheet 12.

The first filling portion 14 preferably contains a coloring material or a light-emitting material. Since the first filling part 14 contains a coloring material or a luminescent material, it is easy to visually confirm when the first filling part 14 protrudes from the roller body 10. In addition, it is easy to confirm the thickness or length of the first filling portion 14.

When the first filling part 14 is colored, the color of the first filling part 14 is not particularly limited. However, the existence of the first filling part 14 can be reliably grasped, and even if the components of the first filling part 14 adhere For the viewpoints that are not obvious in the winding device, white or gray is preferred.

When the first filling portion 14 is colored, the first filling portion 14 contains a coloring material. When the first filling portion 14 is a cured product of a coating material, the coloring material is preferably one that does not hinder curing. The coloring material can be any one of a pigment and a dye, and can be any one of an organic coloring material and an inorganic coloring material. Examples of specific coloring materials include titanium oxide, carbon black, or a mixture of these.

When the first filling portion 14 is colored, the content of the coloring material in the first filling portion 14 is preferably 0.1% by mass or more and 50% by mass or less. If the content of the coloring material is 0.1% by mass or more, the first filling portion 14 can be confirmed visually, and if it is 50% by mass or less, the coloring material can be maintained well regardless of whether it is an inorganic material or an organic material. Processability.

When the first filling portion 14 contains a light-emitting material, the light-emitting material is not particularly limited, and a fluorescent material or a light-storing material can be mentioned. When the first filling part 14 contains a fluorescent material or a light-storing material, the fluorescent material or light-storing material in the first filling part 14 can be made to emit light by irradiating the first filling part 14 with light such as ultraviolet or visible light.

The shape of the surface 14B of the first filling portion 14 is preferably convex upward. If the shape of the surface 14B is convex upward, the sheet 12 can be lifted more than it is concave downward, so the above-mentioned step difference can be more relaxed. Regarding whether the shape of the surface 14B is convex upward, it can be judged from the graph of the positional displacement curve similarly to the thickness T2. Specifically, first, in the above-mentioned graph, the position where the first filling portion 14 is present is higher than the height of the winding core 11, so the amount of displacement increases. Grasp the intersection of the 0mm line of displacement and the position displacement curve in the position where the displacement begins to rise, that is, the position E2 (refer to Figure 10). Then, draw a virtual line IL3 passing through the position E1 and the position E2 (refer to Fig. 10). If the number of peaks in the position displacement curve between the position E1 and the position E2, the ratio of the number of peaks above the virtual line IL3 is 50% or more, it can be judged that the shape of the surface 14B of the first filling portion 14 is upward It is convex, and if the number of peaks above 50% of the number of peaks in the position displacement curve between position E1 and position E2 is less than 50% of the number of peaks located below the virtual line IL3, it can be It is determined that the shape of the first filling portion 14 is concave downward. In addition, when the virtual line IL3 overlaps the position displacement curve, it is judged that it is concave downward. The graph for determining the shape of the first filling portion 14 is such that one scale on the horizontal axis is 5 mm, and one scale on the vertical axis is 0.02 mm.

When the shape of the surface 14B of the first filling portion 14 is convex upward, the average distance D1 from the virtual line IL3 to the position displacement curve in the longitudinal direction is preferably 0.003 mm or more. If the average distance D1 is 0.003 mm or more, since the sheet 12 can be effectively lifted, the above-mentioned step difference can be more relaxed. The lower limit of the average distance D1 is more preferably 0.01 mm or more. Regarding the upper limit of the average distance D1, if it is excessively convex, it may cause a new level difference, so it is preferably 0.1 mm or less, and more preferably 0.07 mm or less. The above-mentioned average distance D1 refers to the imaginary line IL3 as a reference line, reading 7 peaks that are convex upwards from the imaginary line IL3, and averaging the 5 values after removing the maximum value and the minimum value. In addition, the peak of the read wave is the peak, and the larger part is selected.

The inclination of the virtual line IL3 with respect to the horizontal axis of the position displacement curve graph is preferably 0.0020 or more and 0.0130 or less, more preferably 0.0030 or more and 0.0070 or less, and still more preferably 0.0050 or more and 0.0060 or less. If the inclination is 0.0050 or more, the filling material can be filled without dents, and if it is 0.0060 or less, the filling material can be filled without bulging greatly. The lower limit of this inclination is preferably 0.0020 or more, 0.0030 or more or 0.040 or more, and the upper limit is preferably 0.0130 or less, 0.0120 or less or 0.0100 or less.

The thickness of the first filling portion 14 is preferably gradually increased from the vicinity of the separation position P1 toward the front end surface 12A1. By changing the thickness of the first filling portion 14 in this way, it is possible to suppress the sudden height change in the radial direction DR3 (the normal direction of the outer peripheral surface 11A) of the core 11 in the sheet 12, and it is possible to alleviate the change caused by the start of winding. The step difference of the end 12A.

If the thickness of the first filling part changes rapidly, the deformation will remain due to the changed part of the thickness, and there is a possibility that the step caused by the winding start end may not be sufficiently alleviated. Therefore, it is preferable to ensure a sufficient length of the first filling portion with respect to the thickness of the sheet. However, when the length of the first filling part is long and other influences such as curling occur, by deliberately making the length of the first filling part shorter than the optimal state, the above-mentioned deformation relaxation length will be more optimal than the first filling part. The length of the filling part is long, but compared with not providing the first filling part, the aforementioned deformation relaxation length can be shortened. Therefore, when there is the fourth intermediate portion 18 as shown in FIG. 4, the length L1 (refer to FIG. 4) along the longitudinal direction DR2 of the sheet 12 in the first filling portion 14 and the fourth intermediate portion 18 along the sheet The ratio ((length L1 + length L2)/thickness T2) of the total length L2 (refer to FIG. 4) in the longitudinal direction DR2 of 12 to the thickness T2 at the position in contact with the front end surface 12A1 in the first filling part 14 is better Is above 90. In addition, when the fourth intermediate portion 18 does not exist as shown in FIG. 7, the length L1 along the longitudinal direction DR2 of the sheet 12 in the first filling portion 14 (refer to FIG. 7) is higher than that in the first filling portion 14. The ratio of the thickness T2 (length L1/thickness T2) of the position in contact with the front end surface 12A1 is preferably 90 or more. The lower limit of these ratios is preferably 100 or more, 110 or more, 120 or more, or 140 or more in terms of shortening the aforementioned deformation relaxation length. Moreover, the upper limit of these ratios is not specifically limited, For example, it can be 1200 or less, 1000 or less, 800 or less, 500 or less, or 300 or less.

The length L1 is a length along the longitudinal direction DR2 of the sheet 12 from a position in contact with the front end surface 12A1 of the first filling portion 14 to an end on the side of the separation position P1. The length L2 is the length along the longitudinal direction DR2 of the sheet 12 from a position directly above the front end surface 12A1 to an end on the side where the sheet 12 of the first turn and the sheet 12 of the second turn are in contact. The length L1 and the length L2 can be obtained from the graph of the position displacement curve similarly to the thickness T2. Specifically, first, the presence of the fourth intermediate portion is confirmed by the method described below. When there is a fourth intermediate part, find the above-mentioned position E1 and position E2 from the graph of the position displacement curve. Next, through the above-mentioned position E2, draw an imaginary line IL4 perpendicular to the line of displacement of 0 mm (refer to FIG. 10). Then, if the intersection point between the virtual line IL4 and the displacement 0 mm line is the position E3, the total length of the length L1 and the length L2 can be obtained by calculating the distance between the position E2 and the position E3. Moreover, when there is no fourth intermediate part, the distance between the position E2 and the position E3 can be obtained by the above-mentioned method, thereby obtaining the length L1.

From the viewpoint of alleviating the above-mentioned level difference, the longer the length L1 is, the better. For example, when the thickness of the sheet 12 is 50 μm or more and 200 μm or less, the length L1 is preferably 110 μm or more. In order to further shorten the deformation relaxation length, it is preferably 1mm or more, more preferably 10mm or more. However, if the length L1 is too long, it will be difficult to form the first filling portion that is convex upwards during processing, and there is a possibility that the first filling portion may have uneven thickness in a wave shape, so it is easy to obtain the first filling portion that is convex upwards. The upper limit of the length L1 is preferably 100 mm or less from the viewpoint of suppressing wavy thickness unevenness with 1 filling portion 14.

The above-mentioned (length L1 + length L2)/thickness T2 or length L1/thickness T2 can generally represent the shape of the first filling portion 14, but it should be more appropriately represented that the upward convex shape in the first filling portion 14 is more appropriate than It is preferable to further use the area of the first filling portion 14 in a plane including the longitudinal direction DR2 of the sheet 12 and the radial direction DR3 of the winding core 11. Specifically, when there is a fourth intermediate portion 18 as shown in FIG. 4, it is preferable that the total of the area S1 of the region R1 (refer to FIG. 6) and the area S2 of the region R2 (refer to FIG. 6) be relative to the thickness T2. The ratio ((area S1+area S2)/thickness T2) is 3.0 or more, where the thickness T2 is the thickness of the first filling portion 14 at the position in contact with the front end surface 12A1, and the region R1 includes the longitudinal direction DR2 of the sheet 12 and On the plane of the radial direction DR3 of the winding core 11 (the plane shown in FIG. 4), the area sandwiched by the outer peripheral surface 11A of the winding core 11 and the surface 14B of the first filling portion 14, and the area R2 is the area of the winding core 11 The area sandwiched between the outer peripheral surface 11A and the surface 18A of the fourth intermediate portion 18. The area S1 of the region R1 in FIG. 6 represents the cross-sectional area of the first filling portion 14. In addition, the area S2 of the region R2 in FIG. 6 represents the total of the cross-sectional area of the fourth intermediate portion 18, the cross-sectional area of the sheet 12 in the region R2, and the cross-sectional area of the fixing member 17 in the region R2. In addition, in FIG. 6, a state where the sheet 12 on the first filling portion 14 and the fourth intermediate portion 18 is peeled off to expose the first filling portion 14 and the fourth intermediate portion 18 is disclosed. When the fourth intermediate portion 18 does not exist, it is preferable that the ratio of the area S1 of the region R1 to the thickness T2 of the first filling portion 14 (area S1/thickness T2) is 3.0 or more, wherein the region R1 contains the sheet The area on the plane of the longitudinal direction DR2 of 12 and the radial direction DR3 of the winding core 11 (the plane shown in FIG. 7) is sandwiched by the outer peripheral surface 11A of the winding core 11 and the surface 14B of the first filling portion 14. If the ratio is 3.0 or more, the total area S1 and the area S2 or the area S1 is larger than the thickness T2, so the sheet 12 can be effectively lifted by the first filling portion 14, thereby making it more Alleviate the above-mentioned level difference. From the viewpoint of further alleviating the above-mentioned level difference, the lower limit of these ratios is preferably 4.0 or more, 5.0 or more, 6.0 or more, 7.0 or more, or 8.0 or more. In addition, the upper limit of these ratios is not particularly limited, and for example, it may be 50.0 or less, or even 17.0 or less.

（mm）為捲芯之外徑，π為圓周率。 d＝ΔT×（r／60）×

×π×1000　　…（3）The total of area S1 and area S2 or area S1 can be obtained by the following method, that is, in the area from position E2 to position E3, as shown in FIG. 11, the thickness t at each measuring point MP and each The product of the width d between the measurement points MP is added up. In addition, the width between the measuring points can be obtained from the sampling period, the rotation speed of the core and the outer diameter of the core. Specifically, the width between the measurement points can be obtained by the following formula (3). In the formula (3), d (μm) is the width between the measuring points, ΔT (s) is the sampling period, r (rpm) is the rotation speed of the core,

(Mm) is the outer diameter of the core, and π is the circumference ratio. d=ΔT×(r/60)×

×π×1000 …（3）

As mentioned above, since the core is reused after the roll body is used, secondary workability is required. Therefore, it is preferable that the first filling portion 14 is not adhered to the winding core 11. If the secondary processability is good, the core will be in a reusable state after the roll body is used. In this manual, "the core is in a reusable state" means the following state: the entire outer peripheral surface of the core is visually observed, and there are no deposits that could cause the step difference. The removal method differs according to the filling material used in the first filling part. When the crosslinking density is high and hard like a hard coat for display devices, sometimes the edge thickness T1 is thin and easy to remove. On the other hand, when the crosslinking density is not too high and it has rubber elasticity, sometimes the edge thickness T1 is thicker and easier to remove. In either case, as long as there is no remaining attachment that can cause the step difference by visual observation. In addition, the term "next" in this manual includes the concept of adhesion. Since the first filling part 14 is not adhered to the winding core 11, the first filling part 14 can be easily peeled off, so it has good secondary workability. More preferably, the first filling part 14 can be cleaned or wiped off by the winding core 11, or a trigger is made with a blade in a way that does not damage the winding core 11. The ground is stripped from the core 11. Moreover, it is more preferable that the 1st filling part 14 does not substantially contain a continuous component.

In a 90° peel test in which the constituent material of the first filling portion 14 is peeled perpendicularly to the outer peripheral surface 11A of the core 11, it is preferable to be able to peel from the outer peripheral surface 11A of the core 11 with a tensile force of less than 2.0N. When the above-mentioned constituent material can be peeled off with a tensile force of less than 2.0N, since the first filling portion 14 can be easily peeled off, it has good secondary workability. In addition, when the above-mentioned constituent material can be peeled off with a tensile force of 0.3N In the following cases where the tensile force is peeled off, since the first filling portion 14 can be peeled off more easily, it has excellent secondary workability.

The 90° peel test can be performed using a sample and a spring tension meter (manufactured by Oba Keiki Co., Ltd.). Specifically, first, a mold larger than the sample size is prepared, and this mold is placed on the outer peripheral surface 11A of the winding core 11. Then, the coating material for forming the first filling portion 14 is injected into this mold, and if necessary, it is cured to obtain a material layer. Then, the material layer is removed from the mold, and the material layer is cut into a size of 20 mm×100 mm by a cutting machine or the like to obtain 10 samples set on the outer peripheral surface 11A of the core 11. Then, one end of the sample is held by a spring-type tension meter, and the tensile force is measured under an environment with a temperature of 25°C and a relative humidity of 30% or more and 70% or less, and at the same time, it is pulled up vertically with respect to the outer peripheral surface 11A of the core 11 On one end, the sample was peeled off at a peeling speed of 10 mm/sec. Then, remove the sample with the largest tensile force and the sample with the smallest tensile force from the 10 samples subjected to the 90° peel test, and use the arithmetic average of the tensile forces of the remaining 8 samples as the tensile force of the above-mentioned constituent materials.

The tensile strength of the constituent material of the first filling portion 14 is preferably 3.0 MPa or more. If the tensile strength of the above-mentioned constituent material is 3.0 MPa or more, when the first filling part 14 is peeled off, the first filling part 14 is not easily torn, and good secondary workability can be obtained. From the viewpoint of obtaining excellent secondary workability, the lower limit of the tensile strength of the aforementioned constituent material is more preferably 3.2 MPa or more or 3.4 MPa or more. In addition, if the tensile strength of the aforementioned constituent material is too large, the cushioning properties of the first filling portion are poor. Therefore, in order to obtain good cushioning properties, the upper limit of the tensile strength of the aforementioned constituent material is preferably 16.0 MPa or less, 8.0 MPa or less. Below 5.5MPa.

The tensile strength of the above-mentioned constituent materials can be measured in accordance with JIS K6251:2017, using a sample and Tensilon universal testing machine (product name "RTC-1310A", manufactured by Aion Corporation). Specifically, first, a mold larger than the sample size is prepared, and this mold is placed on the outer peripheral surface 11A of the winding core 11. Then, the coating material for forming the first filling portion 14 is injected into this mold, and if necessary, it is cured to obtain a material layer. Then, the material layer is removed from the mold, and the material layer is punched into JIS K6251:2017 by punching a blade (for example, a stretched No. 2 dumbbell-shaped punching blade manufactured by Koko Keiki Co., Ltd.) The size of the dumbbell-shaped No. 2 shape, and 10 samples were obtained. Then, the sample was kept at 25°C for 24 hours. Then, one of the above-mentioned Tensilon universal testing machines is used to grasp the both ends of the sample in the longitudinal direction of the clamps, and the initial distance between clamps is 20mm and the tensile speed is 100mm under the environment of temperature 25℃ and relative humidity 30%～70%. Tensile test is carried out under the condition of /min to determine the tensile strength of the sample. Remove the samples with the maximum and minimum tensile strength from the 10 samples, and use the arithmetic average of the tensile strengths of the remaining 8 samples as the tensile strength of the above-mentioned constituent materials.

The elongation when the constituent material of the first filling portion 14 is cut is preferably 200% or more. If the elongation rate at the time of breaking of the above-mentioned constituent material is 200% or more, since the first filling part 14 is easily stretched, when the first filling part 14 is peeled off, the first filling part 14 is not easily torn, and good quality can be obtained. Secondary processing. From the viewpoint of obtaining excellent secondary workability, the lower limit of the elongation at the time of cleavage of the aforementioned constituent material is more preferably 250% or more, 300% or more, or 350% or more. In addition, the upper limit of the elongation at the time of breaking of the aforementioned constituent material may be 850% or less, 600% or less, or 500% or less. The elongation at break of the above-mentioned constituent materials can be measured in the same way as the tensile strength using a sample and Tensilon universal testing machine (product name "RTC-1310A", manufactured by Ionder Co., Ltd.) in accordance with JIS K6251:2017 Way to determine.

The tear strength of the constituent material of the first filling portion 14 is preferably 1.0 N/mm or more. If the tear strength of the aforementioned constituent material is 1.0 N/mm or more, when the first filling part 14 is peeled off, the first filling part 14 is not easily torn, and good secondary workability can be obtained. From the viewpoint of obtaining excellent secondary workability, the lower limit of the tear strength of the aforementioned constituent materials is more preferably 2.0N/mm or more, 4.0N/mm or more, 6.0N/mm or more, 8.0N/mm or more, or 10N/mm the above. In addition, the upper limit of the tear strength of the aforementioned constituent material may be 35 N/mm or less, 30 N/mm or less, or 25 N/mm or less. The tear strength of the above-mentioned constituent materials can be measured in accordance with JIS K6252: 2007, using a sample and Tensilon universal testing machine (product name "RTC-1310A", manufactured by Iontech Co., Ltd.). Make the sample prepared by the method described in the item of tensile strength.

The hardness of the constituent material of the first filling portion 14 measured by Durometer type A is preferably 95° or less. The front end of the first filling part is often subjected to pressure during winding, and sometimes it is also subjected to pressure due to changes over time or environmental changes (temperature, humidity, and/or pressure). In order to suppress the step caused by the front end of the first filling part, it is also effective that the front end of the first filling part is thin. However, the hardness of the above-mentioned constituent materials measured with Durometer type A can be used to be 95° or less. Like a soft resin, the first filling part is deformed by the pressure when the sheet is rolled up, and the step caused by the front end of the first filling part is suppressed. The upper limit of the aforementioned hardness is more preferably 95° or less, 80° or less, 70° or less, or 50° or less. On the other hand, when the sheet is hard and the first filling part is soft, when the hardness difference between the sheet and the first filling part is large, and there is no fourth intermediate part, only the first filling part will be curled up. The sheet is compressed by the pressure at the time, and the step difference caused by the end of the winding start cannot be sufficiently alleviated, and there is a risk of slight deformation of the sheet. Therefore, the lower limit of the aforementioned hardness is preferably 10° or more, 15° or more, 20° or more, or 25° or more.

Durometer type A hardness measurement can be performed in accordance with JIS K6253:1997. Specifically, first, a mold larger than the sample size is prepared, and this mold is placed on the outer peripheral surface 11A of the winding core 11. Then, the coating material for forming the first filling portion 14 is injected into this mold, and if necessary, it is cured to obtain a material layer. Then, the material layer is removed from the mold, and the material layer is cut by a cutting machine or the like to obtain 10 samples with a size of 100 mm×100 mm and a thickness of 10 mm. Then, using Durometer type A (product name "GS-719N (TYPEA)", manufactured by Teclock Co., Ltd.), the hardness was measured under an environment with a temperature of 25°C and a relative humidity of 30% to 70%. Remove the maximum and minimum hardness samples from the 10 samples, and use the arithmetic average of the hardness of the remaining 8 samples as the hardness of the above-mentioned constituent materials.

When the sheet is wound up, although the coating material flows to alleviate the step difference caused by the end of the winding start, when the coating material is a curable polymer composition, it will be particularly affected if it shrinks during subsequent curing. When there is no fourth intermediate part, the first filling part cannot sufficiently alleviate the level difference, and the sheet may be slightly deformed. Therefore, the linear shrinkage rate of the constituent material of the first filling portion 14 is preferably 1.5% or less. If the linear shrinkage rate of the above-mentioned constituent material is 1.5% or less, since the first filled portion having excellent dimensional stability can be formed, the level difference can be sufficiently reduced by the first filled portion. From the viewpoint of more fully relaxing the level difference, the upper limit of the linear shrinkage rate of the first filling portion 14 is more preferably 1.3% or less, 1.0% or less, and 0.7% or less. In addition, the lower limit of the thermal shrinkage rate may be 0% or more.

The linear shrinkage rate of the above-mentioned constituent materials can be measured in the following manner. First, a mold with a thickness of 2 mm and a size of 130 mm or more is prepared, and the coating material for forming the first filling portion 14 is injected into the mold to harden it to obtain a sample (molded article). After fully hardened, measure the size of the sample and compare it with the size of the inside of the mold, and calculate the linear shrinkage rate based on JIS K6249:2003. The samples with the maximum and minimum linear shrinkage rates are removed from the 10 samples, and the arithmetic average of the linear shrinkage rates of the remaining 8 samples is taken as the linear shrinkage rate of the above-mentioned constituent materials.

The first filling portion 14 can be formed by flowing or deforming a filling material. When the filling material shows fluidity, if it shows fluidity before or during the winding of the sheet, it does not always have to show fluidity. As the filling material, a coating material or a filling tape can be cited.

The coating material is a coatable material, for example, it has fluidity during coating or winding. As a fluid coating material, not only a liquid, but also a material that changes from a liquid to a solid, a solid that has fluidity due to heating, etc., or a hardenable material. When the coating material is a curable material, the first filling portion 14 is formed of a cured product of the curable material.

Examples of coating materials include curable polymer compositions, thermoplastic resins, oils, starches, adhesives, adhesives, and sols.

Examples of the curable polymer composition include a curable resin composition or a curable rubber composition. When a thermoplastic resin is used as a coating material, it needs to be in a state of being fluidized by heating at the time of coating and winding.

The filling tape is a tape that becomes the first filling portion 14 by being filled in the first gap 13 and has a property of spreading by capillary phenomenon due to the pressure when the sheet 12 is wound, or a gel tape. The filling tape is used by sticking or closely adhering to the outer peripheral surface 11A of the winding core 11.

As described above, secondary workability is required for the first filling part. Here, if the filling material (for example, a coating material, etc.) is a sealant material, the sealant material adheres firmly to the winding core, and therefore the secondary workability is poor. In contrast, the molding material has excellent secondary workability due to the premise that it is removed from the mold. Therefore, from the viewpoint of secondary workability, as a filler material (for example, a coating material, etc.), a material for molding is preferable.

At 25°C, the shear viscosity of the filler material (for example, coating material, etc.) at a shear rate of 1/s is preferably 500 Pa·s or less. For example, although it is also considered to use a spatula for the filling material applied to the core (for example, coating material, etc.), and at the same time expand the filling material, adjust the shape of the filling material before winding the sheet, but when using this step It takes a lot of work to expand the filling material. In contrast, if the shear viscosity of the filling material is 500 Pa·s or less, the filling material can be expanded into a desired shape by the pressure when the sheet is rolled, so the special step of expanding the filling material can be omitted. The above-mentioned shear viscosity is more preferably 200 Pa·s or less. From the viewpoint of easily expanding the filler, the above-mentioned shear viscosity is preferably 300 Pa·s or less, 100 Pa·s or less, or 50 Pa·s or less.

On the other hand, from the viewpoint of shortening the deformation relaxation length, the shear viscosity is preferably 10 Pa·s or more and 75 Pa·s or less, and more preferably 20 Pa·s or more and 50 Pa·s or less. If the shear viscosity is 10 Pa·s or more, the fluidity will not become too high, so the deformation of the sheet 12 can be alleviated, and if it is 75 Pa·s or less, it can suppress the deformation caused by the end of the first filling part. The deformation caused.

In addition, from the viewpoint of more suppressing the overflow of the filler, if the above-mentioned shear viscosity is 15 Pa·s or more, or even 20 Pa·s or more, it is preferable to prevent the filler from overflowing between the core 11 and the sheet 12 during coating. . Furthermore, the shear viscosity is preferably 60 Pa·s or more. If the shear viscosity is more than 60 Pa·s, the fluidity of the filling material is low, and even if it is subjected to pressure during coating and/or winding, the filling material can be prevented from overflowing between the core and the sheet.

The above-mentioned shear viscosity of the filler can be measured using a dynamic viscoelasticity measuring device (for example, manufactured by Anton Paar Japan Co., Ltd.). Specifically, a parallel plate with a diameter of 25mm is used to measure the shear viscosity of the filling material at a shear rate of 1[1/s] for 10 times under an environment with a temperature of 25°C and a relative humidity of 30% to 70%. The maximum and minimum values are removed from the 10 measured shear viscosities, and the arithmetic average value of the remaining 8 shear viscosities is obtained, thereby obtaining the shear viscosity.

The filling material (for example, the coating material) preferably does not contain volatile components such as a solvent. Since the filling material does not contain volatile components, the shape change such as cracks in the first filling portion 14 is small, and chip marks are not easily generated.

(Coating material) Although the coating material can be applied when forming the first filling portion, it is preferably a material with low fluidity in the state of the roll body 10. The "low fluidity in the state of the roll body" in this manual means that the coating material will not overflow from the roll body when the roll body is transported or manufactured. When the first filling part 14 is formed in the first gap 13, the coating material must be coatable. However, if the fluidity of the coating material is high in the state of the roll body 10, it will be used during transportation or manufacturing. , The first filling part may overflow, which may cause fouling. On the other hand, if the coating material is a material that can be applied when forming the first filling portion 14 and has low fluidity in the state of the roll body 10, the first filling portion 14 can be formed in the first gap 13 and can suppress The overflow or dirt of the first filling part 14. As such a material that can be applied when forming the first filling portion, but has low fluidity in the state of the roll body 10, a curable polymer composition can be cited.

When the coating material is a curable polymer composition, as the coating material, for example, ionizing radiation curable polymer composition (ionizing radiation curable resin composition or ionizing radiation curable rubber composition), thermosetting Polymer composition (thermosetting resin composition or thermosetting rubber composition), room temperature curable polymer composition (polymer composition curable at room temperature around 20°-30°C) (room temperature Curable resin composition or room temperature curable rubber composition), etc.

The room temperature curable polymer composition has, for example, a two-component curable polymer composition composed of a main agent and a curing agent, or a single-component curable polymer composition that is cured by moisture in the air. Since the part of the first filling part existing in the center of the sheet is in a substantially sealed state when the sheet is wound, it is difficult for air to contact this part, and there is a risk of insufficient hardening. On the other hand, if the two-component curable polymer composition is mixed with the main agent and the curing agent, the reaction will start, so it can be cured only by time management. In addition, the two-component curable polymer composition is better in storage stability than the single-component curable polymer composition.

As an ionizing radiation curable polymer composition, for example, a composition containing a compound having an ethylenically unsaturated group such as a (meth)acryloyl group, a vinyl group, and an allyl group can be cited. Examples of the ionizing radiation irradiated when curing the ionizing radiation curable polymer composition include visible rays, ultraviolet rays, X-rays, electron rays, α rays, β rays, and γ rays.

The ionizing radiation curable polymer composition may be, for example, an acrylic gel composition that forms an acrylic gel by irradiating ionizing radiation. Acrylic gel composition, for example, contains ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (Meth)acrylate, 2-ethylhexyl (meth)acrylate, n-hexyl (meth)acrylate, n-pentyl (meth)acrylate, isopentyl (meth)acrylate, octyl (Meth)acrylate, isooctyl(meth)acrylate, isomyristyl(meth)acrylate, lauryl(meth)acrylate, nonyl(meth)acrylate, isononyl( Meth)acrylate, isodecyl (meth)acrylate, tridecyl (meth)acrylate, stearyl (meth)acrylate, isooctadecyl (meth)acrylate, etc. . In this specification, "(meth)acrylate" means both "acrylate" and "methacrylate".

Examples of the thermosetting polymer composition and the room temperature curing polymer composition include a urethane resin composition, an epoxy resin composition, and a silicone composition. Among these, a polysiloxane composition can be preferably used. As the silicone composition, a silicone gel composition or a silicone rubber composition can be cited. Either one can easily alleviate the above-mentioned level difference and deformation and is suitable.

The "hardened polysiloxane gel (polysiloxane gel)" formed by hardening the polysiloxane gel composition in this specification means that the crosslinking density of organopolysiloxane as the main component is very low The hardened product has a penetration degree of 10 to 150 as specified in JIS K2220:2013 (1/4 cone). This is equivalent to the measured value (rubber hardness value) of 0 under the rubber hardness measurement of JIS K6249:2003, which does not show the low hardness (ie, softness) of the effective rubber hardness value. At this point, it is the same as the so-called Silicone rubber composition and silicone rubber hardened material (rubber-like elastomer) are different.

The silicone rubber composition has a single-liquid curable silicone rubber composition and a two-liquid curable silicone rubber composition. The one-component curable silicone rubber composition has a condensation reaction curable rubber composition that hardens at room temperature, and an addition-reactive rubber composition that is hardened by heating. In addition, the two-component curable silicone rubber composition has a condensation reaction curable rubber composition and an addition reactive rubber composition that are cured at room temperature, and an addition reactive rubber composition that is cured by heating. In addition, other resins can be used to modify the silicone rubber composition to form an ionizing radiation curable rubber composition. In the present invention, any curing method may be used, but among these, a two-component curable silicone rubber composition is preferable in terms of uniform curing and excellent storage stability.

Examples of the silicone rubber composition include a room temperature vulcanizing (RTV) silicone rubber composition. Regarding the RTV silicone rubber composition, the shrinkage rate is smaller than that of the ionizing radiation curable polymer composition, and the dimensional stability is good. In addition, because of the excellent fluidity before curing, it is easy to penetrate between the core 11 and the sheet 12 or the sheet 12 The gap is low, and the fluidity after hardening is low. In addition, since the RTV silicone rubber composition has deep curing properties, the curing reaction is easy to proceed regardless of the thickness at the time of coating. In addition, since this composition is also excellent in mold releasability, it is easy to be in a state that can be reused as a roll body after the cured product is peeled off.

The above-mentioned RTV silicone rubber composition has a condensation reaction-curable RTV silicone rubber composition or an addition reaction-curable RTV silicone rubber composition according to the curing reaction mechanism. In the present invention, all can be preferably used. If it is a condensation reaction-curable RTV silicone rubber composition, it is better in that it has no hardening hindrance. If it is an addition reaction-curable RTV silicone rubber composition, it is better in terms of less curing shrinkage. . In the present invention, the greater the hardening shrinkage of the material, the greater the thickness of the coating material required for the relaxation of the level difference. Therefore, it is especially suitable for thin sheets (for example, the thickness of the sheet 12 is 3 μm to 45 μm). ), the addition reaction curable RTV silicone rubber composition can be preferably used.

Since the above-mentioned RTV silicone rubber composition does not require special processing equipment and the like, it is preferably a liquid silicone rubber (Liquid Silicone Rubber).

In addition, in order to exert a desired function, the above-mentioned various compositions may contain functional components. For example, since the silicone rubber composition is generally an electrical insulator, it sometimes becomes charged due to contact with the core 11, sheet 12, or other materials. In this case, the silicone rubber composition may contain a conductive filler. In this way, it is possible to prevent foreign matter such as dust from being mixed in, so that the cause of the above-mentioned level difference can be suppressed.

As the conductive filler mixed into the silicone rubber composition, carbon black (acetylene black or ketjen black), silver powder, gold-plated silicon dioxide or graphite, conductive zinc bloom, etc. can be cited. In addition, in recent years, ion conductive silicone rubber has also been developed, and this ion conductive silicone rubber can also be used.

In the above-mentioned silicone gel composition, any component can be blended without impairing the purpose of the present invention. Examples of such optional components include reaction inhibitors, inorganic fillers, organopolysiloxanes that do not contain silicon-bonded hydrogen atoms and silicon-bonded alkenyl groups, heat resistance imparting agents, flame retardancy imparting agents, and thixotropy Donating agents, pigments, dyes, etc.

The reaction inhibitor is a component for suppressing the reaction of the above-mentioned composition, and specific examples include reaction inhibitors such as acetylene-based, amine-based, carboxylate-based, and phosphite-based reaction inhibitors.

Examples of inorganic fillers include fumed silica, crystalline silica, precipitated silica, hollow fillers, silsesquioxane, fumed titanium dioxide, Magnesium oxide, zinc oxide, iron oxide, aluminum hydroxide, magnesium carbonate, calcium carbonate, zinc carbonate, layered mica, carbon black, diatomaceous earth, glass fiber and other inorganic fillers; these fillers are treated with organic alkoxy Silicone compounds, organochlorosilane compounds, organosilazane compounds, low-molecular-weight silicone compounds and other organosilicon compounds that have undergone surface hydrophobization treatment, etc. In addition, silicone rubber powder, silicone resin powder, and the like can also be blended.

When the coating material is an adhesive, the adhesive may be a denture stabilizer. Denture stabilizers can be roughly classified into denture adhesives and home-reliners. As the adhesive, denture adhesives among denture stabilizers can be used. When the adhesive is classified into a powder type, a paste type, or a tape type such as a denture adhesive, the adhesive used as a coating material is a powder type or a paste type adhesive.

In addition to the adhesive itself exhibiting adhesiveness, the adhesive can also be one that exhibits adhesiveness through moisture. A powder type adhesive, for example, is one that absorbs water and exhibits adhesiveness when it comes in contact with water. Paste-type adhesives, for example, are those that emulsify adhesive powder components with an ointment base to exhibit adhesiveness.

The adhesive preferably contains a water-soluble polymer. The water-soluble polymer is not particularly limited. For example, alginic acid, alginates (for example, sodium alginate, potassium alginate, ammonium alginate, alginate, etc.), natural polymer compounds (for example, Arabic Gum, tragacanth gum, locust bean gum, sanxian gum, guar gum, agar gum, gelatin, karaya gum, carrageenan, etc.), cellulosic polymers (for example, methyl cellulose, carboxymethyl Sodium cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose, etc.), polyethylene glycol, polyvinyl hydropyrrolidone, polyvinyl alcohol, methyl vinyl ether, carboxy vinyl Polymers, copolymers of acrylamide and acrylic acid, sodium polyacrylate, polyethylene oxide, etc. These water-soluble polymers may be used singly or in any combination of two or more.

Among the above-mentioned cellulose polymers, sodium carboxymethyl cellulose is preferred. Sodium carboxymethyl cellulose is the sodium salt of polyvalent carboxymethyl ether of cellulose, also known as carmellose sodium. Sodium carboxymethyl cellulose is a powder. When it is damp, it will hydrate and show adhesiveness or elasticity. Therefore, it imparts further adhesiveness to the adhesive.

As long as the adhesive as the coating material is coatable, it can be further blended with oily bases, water-based bases, powder bases, gum bases, excipients, emulsifiers, wetting agents, pH adjusters, and viscosity adjusters , Plasticizers, pigments, etc. Examples of these bases or additives include bases or additives that have been widely used as stabilizers for dentures since the past.

For example, with regard to an oily base, when the adhesive is prepared in a paste form such as a paste type, it can be used as the base. Examples of the oily base include mineral oil components (for example, liquid paraffin, petrolatum, gelatinized hydrocarbon, etc.) that are generally used in non-aqueous adhesives (for example, paste type).

As a paste adhesive, for example, New poly grip (registered trademark) S, New poly grip (registered trademark) V, New poly grip (registered trademark) without additives, Polident (registered trademark) NEO denture stabilizer (all are GlaxoSmithKline) can be used Consumer Healthcare Japan Co., Ltd.), Tough grip (registered trademark) ointment without additives (manufactured by Kobayashi Pharmaceutical Co., Ltd.), collect (registered trademark) ointment (manufactured by Shionoyoshi Pharmaceutical Co., Ltd.).

When the coating material is an adhesive, the home-reliner (cushion type) of a denture stabilizer can be used as the adhesive. Adhesives are those that enhance the adhesion by improving the edge sealing effect. Such an adhesive may contain a water-insoluble polymer, for example. The water-insoluble polymer is not particularly limited, and examples thereof include polyethylene resins such as vinyl acetate resins.

As the adhesive, for example, Polident (registered trademark) cushion (manufactured by GlaxoSmithKline Consumer Healthcare Japan), Tough grip (registered trademark) cushion transparent, Tough grip (registered trademark) cushion pink, soft Tough grip (registered trademark) (all are Kobayashi Pharmaceutical Co., Ltd.), Cushion collect (registered trademark) EZ (Shino Yoshitaka Co., Ltd.), New Lion Dent white, New Lion Dent pink (all are Lion Co., Ltd.), etc.

When the coating material is a sol, examples of the sol include metal oxide sols such as silica sol, alumina sol, zirconia sol, titania sol, cerium oxide sol, tin oxide sol, and niobium oxide sol.

In order to prevent excessive flow of the coating material, on the other hand, the coating material is allowed to flow to the vicinity of the position (separation position) P1 where the sheet 12 of the first turn is separated from the outer peripheral surface 11A of the core 11, and the viscosity of the coating material during application should be adjusted appropriately .

The coating material is coated in a linear shape, and the coating amount per unit width of the coating material is preferably such an amount that the thickness T1 to T3 in the above-mentioned range in the first filling portion 14 can be obtained. Specifically, for example, the lower limit of the coating amount per unit width of the coating material is preferably 0.2 cm ³ /m or more. If the coating amount of the coating material is too small, for example, when coating with a syringe, air may be bitten and it is difficult to eject the coating material from the syringe, or when the sheet is moved for coating, coating cracks may sometimes occur. However, if the above-mentioned coating amount is 0.2 cm ³ /m or more, such disadvantages can be suppressed. In addition, the upper limit of the coating amount per unit width of the coating material is preferably 3.5 cm ³ /m or less. If the coating amount of the coating material is too large, the coating material may drip down due to its own weight, or a new step difference may occur. However, if the coating amount is 3.5 cm ³ /m or less, this can be suppressed. Class undesirable situation. The lower limit of the coating amount is more preferably 0.3 cm ³ /m or more, and the upper limit of the coating amount is preferably 2.0 cm ³ /m or less or 1.5 cm ³ /m or less.

(Filling tape) Examples of the constituent material of the filling tape include adhesives, adhesives, gels, and the like described in the item of the above-mentioned coating materials. Examples of gels include silicone gels formed from the above-mentioned silicone gel composition, acrylic gels formed from the above-mentioned acrylic gel composition, polyolefin-based gels, polyurethane-based gels, Butadiene-based gel, isoprene-based gel, butyl-based gel, styrene butadiene-based gel, ethylene/vinyl acetate copolymer-based gel, ethylene-propylene-diene ternary copolymer Material-based gel or fluorine-based gel, etc. As the filling tape, for example, Touch collect (registered trademark) II (manufactured by Shionoyoshi Pharmaceutical Co., Ltd.) or αGEL (registered trademark) (manufactured by Taike Co., Ltd.) can be used.

The length of the filling tape is preferably greater than the width of the effective area in the width direction DR1 of the core 11. By setting the length of the filling tape to such a length, the first filling portion can be formed over the entire width of the effective area, whereby the entire width of the effective area can be relaxed due to the winding start end of the sheet 12 A step difference of 12A. From the viewpoint of suppressing the protruding of the filling tape when winding the sheet 12, the filling tape is preferably arranged in the width direction DR1 of the core 11 to be 1mm or more, 10mm or more or 30mm or more inward from both ends of the sheet 12 in the short side direction. . In addition, the length of the filling tape means the length of the filling tape in the width direction DR1.

The width of the filling tape is preferably 5 mm or more. By setting the width of the filling tape to such a width, the step caused by the winding start end 12A of the sheet 12 can be more effectively alleviated. The lower limit of the width of the filling tape is more preferably 6 mm or more, 7 mm or more, or 8 mm or more. From the viewpoint of suppressing overlap of the filling tape, the upper limit of the width of the filling tape is preferably less than the outer circumference of the core 11. In addition, the width of the filling tape means the length of the sheet 12 of the filling tape in the longitudinal direction DR2.

The thickness of the filling tape is preferably greater than the height of the upper surface 12A2 of the winding start end 12A. By setting the thickness of the filling tape to such a thickness, the filling tape can be expanded in a wide range when the sheet 12 is wound, so that the step caused by the winding start end 12A of the sheet 12 can be alleviated more effectively. The specific thickness of the filling tape, for example, when the thickness of the sheet 12 is 50 μm or more and 200 μm or less, preferably 52 μm or more and 220 μm or less, and when the thickness of the sheet 12 is 3 μm or more but less than 50 μm, it is more It is preferably 50.5 μm or more and 100 μm or less.

＜Second filling part＞ The second filling portion 16 is filled in the second gap 15. That is, the second filling portion 16 is in contact with the outer peripheral surface 11A of the winding core 11, the back surface 12C of the sheet 12, and the first end surface 17A of the fixing member 17.

Since the physical properties such as the tensile strength of the constituent material of the second filling portion 16 are the same as the physical properties such as the tensile strength of the constituent material of the first filling portion 14, the description is omitted here.

The second filling part 16 can be formed by coating or deforming a filling material. As the filling material, a coating material or a filling tape can be cited. Since this filling material, coating material, and filling tape are the same as the filling material, coating material, and filling tape described in the first filling section 14, their description is omitted. The constituent material of the second filling part may be the same as or different from the constituent material of the first filling part 14.

The thickness of the second filling portion 16 preferably gradually decreases from the first end surface 17A toward the vicinity of the arrival position P2 of the first turn of the sheet 12 to the outer peripheral surface 11A of the winding core 11. By changing the thickness of the second filling portion 16 in this way, sudden changes in the height direction of the sheet 12 can be suppressed, so that the step difference caused by the fixing member 17 can be alleviated.

The two ends 12G extending in the longitudinal direction DR2 of the sheet 12 are not used as products. Therefore, the length of the second filling portion 16 in the width direction DR1 of the core 11 is used for the product in the roll body 10 If the effective area is larger than that, it can also be smaller than the width W2 of the sheet 12.

＜The fourth intermediate part＞ Since the first filling part tends to be softer than the sheet, if the height of the first filling part in contact with the end surface before the winding start end is the same height as the upper surface of the winding start end, the winding In the case of a sheet, there is a possibility that a step difference may occur at the corner of the end surface and the upper surface before the winding start end. In contrast, when the fourth intermediate portion 18 is formed, since the fourth intermediate portion 18 can absorb the difference in hardness between the first filling portion 14 and the sheet 12, the front end surface 12A1 and the upper end surface 12A1 of the winding start end portion 12A can be reduced. The step difference of the corners of the surface 12A2. In addition, the presence of the fourth intermediate portion 18 can suppress the concentration of stress on the portion caused by the step difference at the winding start end 12A, and the deformation of the sheet 12 after the third turn can be slowed down, so this step difference can be alleviated .

Like the first filling portion 14, the fourth intermediate portion 18 preferably contains a coloring material or a light-emitting material. Since the fourth intermediate portion 18 contains a coloring material or a luminescent material, it is easy to visually recognize when the fourth intermediate portion 18 protrudes from the roller body 10. In addition, the existence of the fourth intermediate portion 18 can be easily confirmed. Since the coloring material or luminescent material contained in the fourth intermediate portion 18 is the same as the coloring material or luminescent material described in the item of the first filling portion 14, the description is omitted.

When the sheet 12 is transparent and the fourth intermediate portion 18 is colored, whether the fourth intermediate portion 18 exists can be easily confirmed visually. Specifically, first, the sheet 12 is successively discharged from the roller body 10 to the sheet 12 whose surface becomes the second turn. Then, with respect to the roller body 10 with the second turn of the sheet 12 as the surface, the vicinity of the winding start end 12A was visually observed to observe whether or not there is a colored portion on the winding start end 12A. When there is a colored portion on the winding start end 12A, it can be determined that the fourth intermediate portion 18 is present, and when there is no colored portion, it can be determined that the fourth intermediate portion 18 does not exist.

When the sheet 12 is transparent and the fourth intermediate portion 18 contains a luminescent material, whether the fourth intermediate portion 18 is present can also be easily confirmed visually in the same manner as described above. When the light-emitting material is a material that emits light by irradiating light such as ultraviolet rays or visible light, light is irradiated to confirm whether the fourth intermediate portion 18 exists.

When the thickness of the sheet 12 is 50 μm or more and 200 μm or less, the thickness T3 (see FIG. 4) of the fourth intermediate portion 18 is preferably 2 μm or more and 110 μm or less. If the thickness T3 of the fourth intermediate portion 18 is within this range, the adverse effect on the winding of the sheet 12 can be avoided, and at the same time, the aforementioned deformation relaxation length can be shortened. In addition, when the thickness T3 of the fourth intermediate portion 18 exceeds 110 μm, although the aforementioned deformation relaxation length can be shortened, the winding of the sheet 12 may be adversely affected.

When the thickness of the sheet 12 is 3 μm or more but less than 50 μm, and then 40 μm or less, the sheet 12 is more likely to be deformed due to the step difference caused by the winding start end 12A than when the thickness of the sheet 12 is thick. . Therefore, the thickness T3 of the fourth intermediate portion 18 is preferably 0.5 μm or more and 50 μm or less. If the thickness T3 of the fourth intermediate portion 18 is within this range, the adverse effects of the winding of the sheet 12 can be avoided, and at the same time, the aforementioned deformation relaxation length can be shortened.

The thickness T3 of the fourth intermediate portion 18 is set to the maximum thickness of the fourth intermediate portion 18. The thickness T3 of the fourth intermediate portion 18 is measured in the following manner. First, the portion including the winding start end portion 12A, the fourth intermediate portion 18, and the second turn of the sheet 12 is taken out and fixed so that the portion is not damaged. Then, the cross section of the fixed portion is polished, and the thickness T3 of the fourth intermediate portion 18 is measured with a stereo microscope (for example, product name "Digital microscope VHX-7000", manufactured by Chines Co., Ltd.).

The fourth intermediate portion 18 can be formed by coating or deforming a filling material. As the filling material, a coating material or a filling tape can be cited. Since this filling material, coating material, and filling tape are the same as the filling material, coating material, and filling tape described in the first filling section 14, their description is omitted. The constituent material of the fourth intermediate portion 18 may be the same as or different from the constituent material of the first filling portion 14.

＜＜Other roller bodies＞＞ In the roll body 10, the front end surface 12A1 of the winding start end 12A of the sheet 12 and the second end surface 17B of the fixing member 17 are substantially aligned in a cross section along the longitudinal direction DR2 of the sheet 12 and the radial direction DR3 of the core 11, However, in the roll body 20 shown in FIG. 12, the front end surface 12A1 of the winding start end 12A of the sheet 12 may protrude from the second end surface 17B of the fixing member 17. In this case, the second gap 15 is filled with the second filling part 16, and it is located between the outer peripheral surface 11A of the winding core 11 and the back surface 12C of the first turn of the sheet 12, and can be located at the second end surface 17B side The 3 gap 21 is filled with a third filling part 22.

<The third gap> The third gap 21 is a gap in contact with the second end surface 17B of the fixing member 17. Specifically, the third gap 21 shown in FIG. 12 is a gap surrounded by the outer peripheral surface 11A of the winding core 11, the back surface 12C of the sheet 12 of the first turn, and the second end surface 17B of the fixing member 17.

＜The third filling part＞ The third filling portion 22 is the same as the second filling portion 16 except that it is filled in the third gap 21, so the description is omitted here.

Although the roller body 10 is filled with the second filling portion 16 in the second gap 15, from the viewpoint of easing the step caused by the winding start end 12A of the sheet 12, the first gap 13 is filled with the first filling portion 14 Yes, so the roller body 30 as shown in FIG. 13 may not be filled with the second filling part 16 in the second gap 15. The second gap 15 of the roller body 30 is a hole.

Although the roll body 10 is filled with the first filling portion 14 in the first gap 13, from the viewpoint of alleviating the step difference caused by the fixing member 17, the second gap 15 may be filled with the second filling portion 16, so it may be The roller body 40 shown in FIG. 14 is not filled with the first filling part 14 in the first gap 13. The first gap 13 of the roller body 40 is a hole.

Although the roller body 10 has one fixing member 17, as shown in FIG. 15, it may be equipped with two or more fixing members. In the roller body 50 shown in FIG. 15, in addition to the fixing member 17, a fixing member 51 is provided on the first end surface 17A side of the fixing member 17. In the roller body 50 shown in FIG. 15, since the front end surface 12A1 of the winding start end 12A of the sheet 12 protrudes from the second end surface 17B of the fixing member 17, it is preferable to suppress the step caused by the fixing member 17 The second gap 15 is filled with the second filling part 16, and the third gap 21 is filled with the third filling part 22. In the same manner, in the roller body 50 shown in FIG. 15, in order to suppress the step difference caused by the fixing member 51, it is preferable to fill the second gap 52 on the first end face 51A side of the fixing member 51 with the second gap 52. The filling part 53 is filled with a third filling part 55 in a third gap 54 on the side of the second end face 51B described later of the fixing member 51.

＜Fixed member＞ The fixing member 51 has a first end surface 51A and a second end surface 51B on the opposite side. Both the first end surface 51A and the second end surface 51B extend in the width direction DR1 of the winding core 11. Since the fixing member 51 is the same as the fixing member 17, the description is omitted here.

＜Second gap＞ The second gap 52 is a gap in contact with the first end surface 51A of the fixing member 51. Specifically, the second gap 52 shown in FIG. 15 is a gap surrounded by the outer peripheral surface 11A of the winding core 11, the back surface 12C of the sheet 12 of the first turn, and the first end surface 51A of the fixing member 51.

<The third gap> The third gap 54 is a gap in contact with the second end surface 51B of the fixing member 51. Specifically, the third gap 54 shown in FIG. 15 is a gap surrounded by the outer peripheral surface 11A of the winding core 11, the back surface 12C of the sheet 12 of the first turn, and the second end surface 51B of the fixing member 51.

<The second filling part and the third filling part> The second filling portion 53 is the same as the second filling portion 16 except that it is filled in the second gap 52, so the description is omitted here. The third filling part 55 is the same as the second filling part 16 except that it is filled in the third gap 54, so the description is omitted here.

Although the roller body 10 is provided with the fixing member 17, the roller body 60 as shown in FIG. 15 may not be provided with the fixing member 17. As shown in FIG.

In Figure 12, Figure 13, Figure 15, Figure 16, although the length L1, length L2, thickness T2, thickness T3, area S1, area S2 are not shown, in the roller body 20, 30, 50, 60, the length L1 , Length L2, thickness T2, thickness T3, (length L1+L2)/thickness T2, (area S1+S2)/thickness T2 are the same as in the case of the roll body 10.

Although the roller bodies 20, 30, 50, and 60 all have the fourth intermediate portion 18, they may not have the fourth intermediate portion. In this case, the length L1/thickness T2 or the area S1/thickness T2 is the same as that of the roller body 10 shown in FIG. 7.

In FIG. 13, although the surface of the fixing member 17 is in close contact with the winding start end portion 12A, it may be the same as the roll body 10 shown in FIG. 8 where the first filling portion 14 enters the winding start end portion 12A Between and the fixed member 17.

＜＜Method of manufacturing roll body＞＞ The roller body 10 can be manufactured by the following method, for example. First, as shown in FIG. 17(A), the fixing member 17 is arranged on the outer peripheral surface 11A of the winding core 11 along the width direction DR1 of the winding core 11.

After arranging the fixing member 17, using a coating device such as a dispenser or a syringe, as shown in FIG. 17(B), the coating materials 201 and 202 are applied to the outer peripheral surface 11A of the core 11 along the width direction DR1 of the core 11. The coating material 201 is coated so as to be in contact with the second end surface 17B of the fixing member 17, and the coating material 202 is coated so as to be in contact with the first end surface 17A of the fixing member 17. In this case, for example, two coating devices may be used to simultaneously apply the coating materials 201 and 202.

In the above, although the coating material 201 is applied to be in contact with the second end surface 17B and the coating material 202 is applied to be in contact with the first end surface 17A, when the wettability of the coating material is high and the viscosity of the coating material is low At this time, if it is applied so as to be in contact with the second end surface or the first end surface, the coating material may penetrate between the winding start end and the fixing member, and may wet through between the winding start end and the back surface of the sheet. Although a better state can be achieved by controlling the coating material, if there is excess penetration or wet diffusion, it will sometimes harden in an uncontrollable position, resulting in a new level difference. In addition, when the viscosity of the filling material is high (for example, in the form of a tape) or the wettability of the coating material is low, if the filling material or coating material is arranged, it is very likely that the moisture will spread only in the vicinity of the arrangement. It is hardened in the state of, so when it is not sufficiently wet and spread due to the winding of the subsequent step, there is also the following risk: the hardened material in the thick state near the winding start end will increase, and the step will be worse. Get bigger. Therefore, the coating material 201 is preferably applied close to the second end surface 17B of the fixing member 17, and the coating material 202 is preferably applied close to the first end surface 17A of the fixing member 17. "Close" in this manual means a position that is clearly separated from the winding start end or the fixing member. For example, even if the coating material is a low-viscosity material, the separation distance from the winding start end or the fixing member should be 0.3 mm or more. The separation distance is preferably 0.5 mm or more, and from the viewpoint of making it most stable, it is preferably 1 mm or more. In addition, if the separation distance is too large, it will be difficult to obtain the effect of alleviating the level difference. Therefore, it is better to complete the range adjustment distance of the first filling portion 14 shown in FIG. 3 and so on. For example, the upper limit of the separation distance is preferably 10 mm or less, 7 mm or less, or even 5 mm or less. In addition, if the separation distance exceeds 10 mm, in addition to the possibility that the first gap may not be filled, although it also depends on the diameter of the core, there is a possibility that the coating material may flow down before the sheet is wound. In addition, when the viscosity of the coating material is low, the coating amount can be increased. The separation distance is measured at 10 locations, the maximum and minimum values are removed from the measured separation distances at 10 locations, and the arithmetic average of the separation distances at the remaining 8 locations is obtained by this.

When the viscosity of the coating material is high viscosity, the coating material is difficult to expand, so the above separation distance is better. When the viscosity of the coating material is low viscosity, if the separation distance is too small, there will be coating There is a possibility that a large amount of material exists on the fixing member, and if the separation distance is too large, it may expand in other directions and may not be sufficiently filled in the target gap. Therefore, the separation distance is preferably not too small and not too large.

In the above, after the fixing member 17 is arranged on the outer peripheral surface 11A of the winding core 11, the coating materials 201 and 202 are applied to both sides of the fixing member 17 at the same time. However, the following manufacturing methods (1) to (3) ) The application of the coating materials 201 and 202 and the arrangement of the fixing member 17 are performed in the order. Among these, the following manufacturing method (2) is preferable. The same applies to the coating materials 204 and 205 described later.

The manufacturing method (1) is the following method, that is, after the fixing member 17 is arranged on the outer peripheral surface 11A of the winding core 11, the second end surface 17B side of the fixing member 17 is coated so as to become the above-mentioned separation distance. The material 201 is then coated with the coating material 202 on the first end surface 17A side of the fixing member 17 so as to become the aforementioned separation distance.

The manufacturing method (2) is a method of applying the coating material 201 to the outer peripheral surface 11A of the winding core 11, and then disposing the fixing member 17 so that the distance from the coating material 201 becomes the above-mentioned separation distance, and then The distance from the fixing member 17 becomes the above-mentioned separation distance, and the coating material 202 is coated on the opposite side of the coating material 201 in the fixing member 17. By performing the application of the coating materials 201, 202 and the arrangement of the fixing member 17 in this order, it can be arranged stably and with a separation distance, and it is possible to prevent unnecessary coating materials 201, 202 from being applied to the fixing member 17, so that It is suppressed that a new level difference is generated on the fixing member 17.

The manufacturing method (3) is a method in which the coating materials 201 and 202 are applied to the outer peripheral surface 11A of the core 11 at predetermined intervals, and then the fixing member 17 is arranged between the coating materials 201 and 202.

In addition, it is preferable that when the first filling portion 14 is formed but the second filling portion 16 is not formed, the coating material 201 is first applied, and then the fixing member 17 is arranged such that the distance from the coating material 201 becomes the above-mentioned separation distance. In addition, when the second filling portion 16 is formed but the first filling portion 14 is not formed, the coating material 202 is first applied, and then the fixing member 17 is arranged so that the distance from the coating material 202 becomes the aforementioned separation distance.

The coating materials 201 and 202 are preferably coated to be greater than the width of the effective area in the width direction DR1 of the core 11. By applying the coating materials 201 and 202 in this way, the coating materials 201 to 205 can be present in the entire width of the effective area in the first filling portion and the second filling portion, thereby alleviating the cause over the entire width of the effective area The level difference at the winding start end of the sheet 12 and the level difference caused by the fixing member 17. From the viewpoint of suppressing the overflow of the coating materials 201 and 202 when winding the sheet 12, the coating materials 201 and 202 are preferably applied so that the width direction DR1 of the core 11 is 1 mm or more from both ends in the short side direction of the sheet 12 to the inside. , 10mm or more or 30mm or more.

The coating material 201 is preferably coated so that the width of the coating material 201 is 5 mm or more, 10 mm or more, or 30 mm or more. By applying the coating material 201 in this way, the step caused by the winding start end 12A of the sheet 12 can be more effectively alleviated. From the viewpoint of suppressing overlapping of the coating material, the upper limit of the width of the coating material 201 is preferably less than the outer circumference of the core 11.

The coating material 202 is preferably coated so that the width of the coating material 202 is 0.5 mm or more, 1 mm or more, or 5 mm or more. By applying the coating material 202 in this way, the step difference caused by the fixing member 17 can be more effectively alleviated. From the viewpoint of suppressing overlapping of the coating materials, the upper limit of the width of the coating material 202 is preferably less than the outer circumference of the core 11.

The coating material 201 is preferably applied so that the thickness of the coating material 201 is greater than the height of the upper surface 12A2 of the winding start end 12A. By applying the coating material 201 in this manner, since a sufficient amount of the coating material 201 can be applied, the step caused by the winding start end 12A of the sheet 12 can be more effectively alleviated. The specific thickness of the coating material 201, for example, when the thickness of the sheet 12 is 50 μm or more and 200 μm or less, preferably 52 μm or more and 2000 μm or less, and when the thickness of the sheet 12 is 3 μm or more but less than 50 μm , Preferably 50.5 μm or more and 2000 μm or less. In addition, the thickness of the coating material 201 is the thickness before the sheet 12 is wound.

The coating material 202 is preferably coated so that the thickness of the coating material 202 is greater than the height of the surface of the fixing member 17. By coating the coating material 202 in this way, a sufficient amount of the coating material 202 can be coated, so the step difference caused by the fixing member 17 can be more effectively alleviated. Specifically, the lower limit of the thickness of the coating material 202 is preferably 3 μm or more and 12 μm or less when the thickness of the fixing member 17 is 3 μm or more and 10 μm or less. In addition, the thickness of the aforementioned coating material 202 is the thickness before winding the sheet 12.

After coating the coating materials 201 and 202, as shown in FIG. 18(A), the winding start is arranged such that the front end surface 12A1 of the winding start end 12A of the sheet 12 is in contact with the coating material 201 and the sheet 12 covers the coating material 202.端部12A. Specifically, the winding start end 12A of the sheet 12 is attached to the fixing member 17, and the winding start end 12A is fixed to the outer peripheral surface 11A of the winding core 11 through the fixing member 17.

After the winding start end 12A of the sheet 12 is fixed to the winding core 11, the sheet 12 is wound along the outer peripheral surface 11A of the winding core 11 as shown in FIG. 18(B). If the sheet 12 is wound, the coating materials 201 and 202 will flow and expand, so the coating material 201 will be filled in the first gap 13, and the coating material 202 will be filled in the second gap 15, so as to be filled in the first gap The first filling part 14 of 13 and the second filling part 16 filled in the second gap 15. Thereby, the roller body 10 can be obtained. In addition, in order to surely spread the coating material 201 etc. and fill it in the first gap 13 etc., when the sheet 12 exceeds 1000m, it is preferable to wind the sheet 12 more than 1000m, and when the sheet 12 is less than 1000m, The overall length of the winding sheet 12 is preferable.

In addition, when the coating materials 201 and 202 are curable polymer compositions, the curable polymer composition is cured after at least the second turn of the sheet 12 is wound. When the curable polymer composition is a single-liquid curable polymer composition (moisture-curable polymer composition), the composition will be cured by reacting with the humidity in the air and placed at room temperature. Therefore, it can be hardened without using special devices such as heating devices or ionizing radiation irradiation devices. In addition, when the curable polymer composition is a two-component curable polymer composition, it can be cured by mixing the main agent and the curing agent.

The roller body 20 can be manufactured by the following method, for example. First, the fixing member 17 is arranged on the outer peripheral surface 11A of the winding core 11 along the width direction DR1 of the winding core 11.

After arranging the fixing member 17, using a coating device such as a dispenser or a syringe, as shown in FIG. 19(A), the coating materials 203 to 205 are applied to the outer peripheral surface 11A of the core 11 along the width direction DR1 of the core 11. The coating material 204 is coated so as to be in contact with the first end surface 17A of the fixing member 17, and the coating material 205 is coated so as to be in contact with the second end surface 17B of the fixing member 17. The coating material 203 is applied to a portion separated from the second end surface 17B of the fixing member 17 and the coating material 205. In addition, the coating material 203 may be applied to be close to the front end surface 12A1 of the winding start end 12A of the sheet 12, the coating material 204 may be applied to be close to the first end surface 17A of the fixing member 17, and the coating material 205 may also be applied. It is close to the second end surface 17B of the fixing member 17. In addition, although the coating materials 203 to 205 are applied after the fixing member 17 is arranged on the outer peripheral surface 11A of the winding core 11, the coating material 204 may be contacted or approached to the fixing member 17 after the coating materials 203 to 205 are applied. The fixing member 17 is arranged so that the coating material 205 contacts or approaches the second end surface 17B of the fixing member 17 in the form of one end surface 17A.

After coating the coating materials 203 to 205, as shown in FIG. 19(B), the front end surface 12A1 of the winding start end 12A of the sheet 12 contacts the coating material 203, and the sheet 12 covers the coating materials 204 and 205, respectively, Arrange the winding start end 12A. Specifically, the winding start end 12A of the sheet 12 is attached to the fixing member 17, and the winding start end 12A is fixed to the outer peripheral surface 11A of the winding core 11 through the fixing member 17.

After fixing the winding start end 12A of the sheet 12 to the winding core 11, as shown in FIG. 19(C), the sheet 12 is wound along the outer peripheral surface 11A of the winding core 11. If the sheet 12 is wound, since the coating materials 203 to 205 will flow and expand, the coating material 203 will be filled in the first gap 13, the coating material 204 will be filled in the second gap 15, and the coating material 205 will be filled in the first gap. 3 gaps 21 to form a first filled portion 14 filled in the first gap 13, a second filled portion 16 filled in the second gap 15 and a third filled portion 22 filled in the third gap 21 are formed. Thereby, the roller body 20 can be obtained. In addition, in order to surely spread the coating material 203 etc. and fill it in the first gap 13, etc., when the sheet 12 exceeds 1000m, it is preferable to wind the sheet 12 over 1000m, and when the sheet 12 is less than 1000m, The overall length of the winding sheet 12 is preferable.

In the above-mentioned manufacturing method, although the coating materials 201 to 205 are all flowed by winding the sheet 12, the coating material 201 and the like may be flowed in advance before the sheet 12 is wound. However, if the coating material 201 or the like is made to flow before the winding sheet 12, since the number of steps is increased, it is preferable to flow the coating materials 201 to 205 by winding the sheet 12.

In the above-mentioned manufacturing method, although a dispenser or a syringe or other coating device is used to apply the coating materials 201-205, a coating device and a die with a slit may be used to apply the coating materials 201-205. By using a die with slits to coat the coating materials 201 to 205, the thickness or width of the coating materials 201 to 205 can be reduced. The constituent material of the mold is not particularly limited, and examples thereof include resin or metal.

Specifically, first, a mold 210 having a slit 210A as shown in FIG. 20(A) is prepared. The mold 210 is used to coat the coating material 201. Since the length, width, and depth of the slit 210A are the same as the length, width, and thickness of the coating material 201, the description is omitted here.

After preparing the mold 210, as shown in FIG. 20(B), the mold is arranged on the outer peripheral surface 11A of the winding core 11 along the width direction DR1 of the winding core 11. When the mold 210 is viewed from directly above, the mold 210 is arranged such that the inner surface on the side of the fixing member 17 in the slit width direction overlaps or approaches the second end surface 17B of the fixing member 17.

After the mold 210 is placed on the outer peripheral surface 11A of the core 11, a coating device such as a dispenser or a syringe is used to supply the coating material 201 into the slit 210A as shown in FIG. 20(B). The coating device may be a dispenser or a syringe, but may also be a sprayer or a die coater. Then, if necessary, the excess coating material 201 existing on the surface of the mold 210 is scraped off with a doctor blade or the like. Then, by removing the mold 210, the coating material 201 can be disposed on the outer peripheral surface 11A of the winding core 11. The subsequent steps are the same as the above-mentioned steps of the roller bodies 10 and 20. The coating materials 202 to 205 can also be arranged in the same order using the mold 210 with the slit 210A.

Instead of applying the coating materials 201-205, the filling tape may be arranged on the outer peripheral surface 11A of the winding core 11. Specifically, first, as shown in FIG. 21(A), the coating material 201 is applied to the surface of the substrate 221 in a strip shape by a coating device such as a dispenser or a syringe to form the substrate 221 and the coating material 201 The laminated body 220 of the filled tape 222 is constituted. In addition, although the filling tape 222 is formed of the coating material 201 here, if the filling tape is formed of a material that expands due to the pressure when the sheet is wound, the coating material 201 may not be used.

The constituent material of the base material 221 is not particularly limited, and examples thereof include polyester resins such as polyethylene terephthalate, cellulose resins such as cellulose triacetate, and acrylic resins. Moreover, a well-known mold release film can also be used as the base material 221. When coating the coating material 201 on the surface of the substrate 221, it is preferable to draw an alignment line 221A on the substrate 221 in advance, and apply the coating material 201 along the alignment line 221A. By drawing such an alignment line 221A on the substrate 221 in advance, the positional deviation of the coating material 201 can be suppressed. Moreover, when coating the coating material 201 on the surface of the substrate 221, it is preferable to use an unwinding device to unwind the substrate 221 at a constant speed while the coating device is fixed. By unwinding the base material 221 at a constant speed, uneven coating can be suppressed.

After the laminated body 220 is formed, as shown in FIG. 21(B), the laminated body 220 is attached or closely adhered to the outer circumferential surface 11A of the winding core 11 so that the filling tape 222 contacts the outer circumferential surface 11A of the winding core 11. The filling tape 222 is attached or closely adhered so as to contact or approach the second end surface 17B of the fixing member 17. Then, the base material 221 is peeled off. Thereby, the filling tape 222 can be arranged on the outer peripheral surface 11A of the winding core 11. The subsequent steps are the same as the above-mentioned steps of the roller bodies 10 and 20.

In the above, although a laminate having one substrate and a filling tape is formed, a laminate having two substrates, a filling tape, and a thickness adjusting member may also be formed. Specifically, as shown in FIG. 22(A), the coating material 201 is coated on the surface of the first substrate 231 by a coating device such as a dispenser or a syringe.

Then, as shown in FIG. 22(B), the second base material 233 is superimposed on the coating material 201 by sandwiching the coating material 201 and the thickness adjusting member 232 having the desired thickness to make the coating material 201 a desired thickness. , And a laminated body 230 is formed. As the thickness adjusting member 232, for example, spacers, particles, and the like can be cited. The peel strength of the second substrate 233 to the coating material 201 is preferably lower than the peel strength of the first substrate 231 to the coating material 201. By satisfying this relationship, the second base material 233 can be easily peeled off. The peel strength of the second base material 233 is a value measured by the following measurement method using a tensile tester (product name "Single column type material tester STA-1150", manufactured by A&D Co., Ltd.). When measuring the peel strength, first, a double-sided tape (Teraoka Manufacturing Co., Ltd., No. 751B) was attached to a glass plate of 30 cm in length×2.5 cm in width. On the other hand, the laminated body 230 is cut into a size of 200 mm in length × 25 mm in width, attached to the side of the first substrate 231 with a double-sided tape on a glass plate, and held in a pair of jigs of a tensile testing machine. Then, the laminated body 230 attached to the glass plate is held by one of the tensile testers on the jig. When holding the laminated body 230 by the jigs, the second base material 233 is slightly peeled off from the laminated body 230 by hand in advance to make a trigger. One jig holds the second base material 233 and the other jig holds the glass plate and Stacked body 230. Then, in this state, the second substrate 233 was peeled under the conditions of a peeling speed of 300 mm/min, a peeling distance of 50 mm, and a peeling angle of 180°, and the peeling strength of the coating material 201 and the second substrate 233 at that time was measured. In addition, let the peel strength be the arithmetic average of the values measured 3 times. The peel strength of the first substrate 231 is also measured in the same manner as the peel strength of the second substrate 233. As the first base material 231 and the second base material 233, the same ones as the base material 221 can be used.

After the layered body 230 is formed, a predetermined pressure is applied to the layered body 230. Thereby, the thickness of the coating material 201 becomes a desired thickness. Then, the layered body 230 is cut into a strip shape. Thereby, a laminated body 230 having a filling tape 234 composed of the coating material 201 is formed.

Then, as shown in FIG. 22(C), the second base material 233 is peeled off. Then, in this state, as shown in FIG. 22(D), the laminated body 230 is attached or closely adhered to the outer circumferential surface 11A of the winding core 11 so that the filling tape 234 contacts the outer circumferential surface 11A of the winding core 11. The filling tape 234 is attached or closely adhered so as to contact or approach the second end surface 17B of the fixing member 17. Then, the first base material 231 is peeled off. Thereby, the filling tape 234 can be arranged on the outer peripheral surface 11A of the winding core 11. The subsequent steps are the same as the above-mentioned steps of the roller bodies 10 and 20. Instead of the coating materials 202 to 205, the filling tape may be arranged on the outer peripheral surface 11A of the core 11 in the same procedure as the filling tape 234.

In addition, a mold may be used to form and transfer the filling tape. By using a mold to transfer the filling belt, the fixing member 17 and the filling belt can be easily installed at the same time. Specifically, first, as shown in FIG. 23(A), a mold 241 is prepared. The mold 241 has an opening 241A. As for the mold 241, it is preferable that the side of the longitudinal direction of the mold 241 is opened so that the filling tape described later can be easily removed from the mold 241. The mold 241 is U-shaped, for example. The mold 241 is not particularly limited, and may be formed of resin, metal, or the like, for example. Since the length, width, and depth of the opening 241A of the mold 241 are the same as the length, width, and thickness of the filling tape, the description is omitted here.

After the mold 241 is prepared, as shown in FIG. 23(B), the coating material 201 is injected into the mold 241 to form a filling tape 242. Then, as shown in FIG. 23(C), the die 241 is pressed such that the filling tape 242 contacts the outer peripheral surface 11A of the winding core 11. When pressing the mold 241, when the coating material 201 is a material that exhibits adhesiveness by moisture, it is preferable to moisten the surface of the filling tape 242 with water to make it adhered in advance. By sticking the surface of the filling tape 242, it can be attached or closely adhered to the outer peripheral surface 11A of the winding core 11.

Then, the mold 241 is removed from the filling belt 242. Thereby, the filling tape 242 can be arranged on the outer peripheral surface 11A of the winding core 11. The subsequent steps are the same as the above-mentioned steps of the roller bodies 10 and 20. Instead of the coating materials 202 to 205, the filling tape may be arranged on the outer peripheral surface 11A of the core 11 in the same procedure as the filling tape 242.

It is also possible to transfer the filling tape to the outer peripheral surface 11A of the core 11 by using offset printing. By using offset printing to form and transfer the filling belt, time management can be made easy, and the filling belt can be set at the set time and position with good accuracy. Specifically, first, as shown in FIG. 24(A), the coating material 201 is applied to the outer peripheral surface of the intermediate transfer body 251 (for example, an intermediate transfer roller) by a coating device such as a dispenser or a syringe to form a filling belt 252. Then, as shown in FIG. 24(B), the filling tape 252 formed on the outer peripheral surface of the intermediate transfer body 251 is transferred to the outer peripheral surface 11A of the core 11 by a lithography method. Thereby, the filling tape 252 can be arranged on the outer peripheral surface 11A of the winding core 11. The subsequent steps are the same as the above-mentioned steps of the roller bodies 10 and 20. Instead of the coating materials 202 to 205, the filling tape may be arranged on the outer peripheral surface 11A of the core 11 in the same procedure as the filling tape 252.

According to this embodiment, since the first gap 13 is filled with the first filling part 14, the part of the first round piece 12 on the first filling part 14 can be gently lifted from the separation position P1 toward the front end surface 12A1 . Thereby, the step caused by the winding start end 12A of the sheet 12 can be alleviated.

According to the present embodiment, since the second gap 15 is filled with the second filling portion 16, the portion of the first round piece 12 on the second filling portion 16 can be gently lowered from the first end surface 17A toward the arrival position P2 . Thereby, the step difference caused by the fixing member 17 can be effectively alleviated.

In the roller body 20, since the third gap 21 is filled with the third filling portion 22, the portion of the first round sheet 12 on the third filling portion 22 can be gently lifted. Thereby, the step difference caused by the fixing member 17 can be alleviated more effectively.

If the sheet is deformed, there will be parts in the sheet that cannot be used as a product, so in order to ensure the effective length, the effective length of the sheet is compensated. That is, if the portion of the sheet that cannot be a product becomes longer due to deformation, the sheet loss will increase. On the other hand, according to the present embodiment, since the step caused by the winding start end 12A of the sheet 12 or the step caused by the fixing members 17 and 51 can be alleviated, the deformation of the sheet 12 can be suppressed. In this way, sheet loss can be reduced.

[Second Embodiment] Hereinafter, the roller body of the second embodiment of the present invention will be described with reference to the drawings. Fig. 25 is a perspective view of the roller body of the embodiment, Fig. 26 is an enlarged view of a part of the roller body of Fig. 25, Fig. 27 is a diagram for explaining the dimensions of each component of the roller body of Fig. 25, and Fig. 28 is a measurement Fig. 25 is a diagram showing the maximum thickness and length of the second intermediate portion, and Fig. 29 is a diagram showing the cross-sectional area S3. FIGS. 30 to 37 are enlarged views of a part of other roller bodies of this embodiment, and FIGS. 38 and 39 are diagrams schematically showing the manufacturing steps of the roller body of this embodiment.

＜＜＜Roll body＞＞＞ The roll body 70 shown in FIG. 25 includes a winding core 11 and a long sheet 12 wound around the outer peripheral surface 11A of the winding core 11. As shown in FIG. 25, the roller body 70 is further provided with a first intermediate portion 71 and a second intermediate portion 72 provided between the sheets 12 after the first turn, and a fixing for fixing a part of the sheet 12 to the core 11 Component 17. The sheet 12 is wound around the winding core 11 in a plurality of turns, for example, two or more turns. Since the first gap 13 and the second gap 15 of the roller body 70 are pores, the first gap 13 is not filled with the first filling part 14 and the second gap 15 is not filled with the second filling part 16.

＜＜The first intermediate part＞＞ The first intermediate portion 71 is provided between the sheets 12 after the first circle. Specifically, the first intermediate portion 71 is located on the lower side of the first intermediate portion 71 (winding core 11 side) and the sheet 12 on the lower side in contact with the first intermediate portion 71 and the sheet 12 located on the upper side of the first intermediate portion 71 and The sheet 12 on the upper side in contact with the first intermediate portion 71 is clamped. Therefore, the sheet 12 must be present on the first intermediate portion 71. In addition, although the first intermediate portion 71 is provided between the sheets 12 after the first turn, specifically, the first intermediate portion 71 is provided at least between the sheets 12 after the first turn and corresponds to the first gap 13 The first area 12D. In addition, the first intermediate portion 71 extends in the width direction DR1 of the winding core 11.

Regarding the edge thickness T4 (refer to FIG. 27) of the edge portion 71A on the side of the separation position P3 (refer to FIG. 26) where the upper sheet 12 is separated from the lower sheet 12 in the first intermediate portion 71, if this thickness is thick, there is There is a risk of forming a new step due to this thickness, so it is better to be thinner. Specifically, for example, the edge thickness T4 is preferably 50 μm or less. In terms of shortening the strain relaxation length, the edge thickness T4 is more preferably 10 μm or less, and still more preferably 2 μm or less.

In addition, when the sheet 12 is a film having a thickness of 3 μm or more but less than 50 μm, it is more susceptible to the effect of the step difference caused by the winding start end 12A than in the case of a thick thickness, so it should be used In the case of such a film, the edge thickness T4 is preferably 10 μm or less, and from the viewpoint of minimizing the above-mentioned strain relaxation length, it is more preferably 5 μm or less, and still more preferably 1 μm or less.

The edge thickness T4 can be measured by using a scanning optical interference surface profile measuring machine (product name "New View7300", manufactured by SEG) by the same method as the edge thickness T1. In addition, it can also be measured in the following manner. First, cut the part including the end 71A and the sheet 12 on the lower side of the contact end 71A and the upper sheet 12, and cut or grind the section with a knife to obtain a section of this part. Use a stereo microscope (for example, the product name " Digital microscope VHX-7000", manufactured by Chines Co., Ltd.).

As shown in FIGS. 26 and 27, the first intermediate portion 71 has a first portion 71B and a second portion 71C. The first portion 71B is located between the first region 12D corresponding to the first gap 13, and the second portion 71C is located The sheet 12 on the upper side of the first portion 71B reaches the reaching position P4 (see FIG. 26) side of the sheet 12 on the lower side. The first intermediate portion 71 has not only the first portion 71B but also the second portion 71C, thereby suppressing the concentration of stress on the portion caused by the step difference of the winding start end portion 12A, so that the upper sheet 12 and the subsequent sheet 12 The deformation becomes slower, so this step difference can be alleviated.

The thickness T5 (refer to FIG. 27) of the second portion 71C is preferably 2 μm or more and 300 μm or less. If the thickness T5 of the second portion 71C is within this range, the adverse effect on the winding of the sheet 12 can be avoided, and at the same time, the aforementioned deformation relaxation length can be shortened. In addition, when the thickness T3 of the second portion 71C exceeds 300 μm, although the aforementioned deformation relaxation length can be shortened, the winding of the sheet 12 may be adversely affected.

The thickness T5 of the second portion 71C is set to the maximum thickness of the second portion 71C. The thickness T5 of the second part 71C can be measured using a scanning optical interference surface profile measuring machine (product name "New View 7300", manufactured by SEG) by the same method as the edge thickness T1. Or it can be measured in the following way. First, the portion including the lower sheet 12, the second portion 71C, and the upper sheet 12 is taken out and fixed so that the portion is not damaged. Then, the section of the fixed part is polished, and the thickness T5 of the second part 71C is measured with a stereo microscope (for example, product name "Digital microscope VHX-7000", manufactured by Chines Co., Ltd.).

If the thickness of the first intermediate portion changes abruptly, deformation will remain due to the changed portion of the thickness, and there is a possibility that the step due to the winding start end may not be sufficiently alleviated. Therefore, it is preferable to ensure a sufficient length of the first intermediate portion with respect to the thickness of the sheet. However, when the length of the first intermediate portion is made long and other effects such as curling occur, by reluctantly making the length of the first intermediate portion shorter than the optimal state, the above-mentioned deformation relaxation length will be more optimal than the first intermediate portion. The length of the intermediate portion is long, but compared with not providing the first intermediate portion, the aforementioned deformation relaxation length can be shortened. Therefore, the length L3 of the first intermediate portion 71 from the position corresponding to the front end surface 12A1 to the end on the side of the separation position P3 is relative to the distance D2 from the outer peripheral surface 11A of the core 11 to the upper surface 12A2 of the winding start end 12A (refer to Fig. 27) The ratio (length L3/distance D2) is preferably 1 or more. The ratio is more preferably 5 or more, and still more preferably 50 or more in terms of shortening the aforementioned deformation relaxation length.

The length L3 can be measured in the following manner. First, the lower sheet 12 and the upper sheet 12 are left, and the other sheets 12 are unrolled. Here, if the sheet 12 is transparent or semi-transparent, the area where the first intermediate portion 71 exists can be recognized. Therefore, using a ruler or tape measure, through the observation sheet 12, measure the distance from the front end surface 12A1 of the winding start end portion 12A to the end of the first intermediate portion 71 on the side of the separation position P3 at 10 locations in the width direction of the sheet 12 to obtain The average value is used to obtain the length L3. On the other hand, when the observation sheet 12 cannot be transmitted through, first, the portion including the lower sheet 12, the first intermediate portion 71, and the upper sheet 12 is taken out so that the portion is not damaged. Then, after fixing the part, grind out the cross section, and measure with a stereo microscope (for example, the product name "Digital microscope VHX-7000", manufactured by Chines Co., Ltd.) from the first intermediate part corresponding to the front end surface 12A1 The distance from the position to the end of the separation position.

The longer the length L3 is, the better, but for example, when the thickness of the sheet 12 is 50 μm or more and 200 μm or less, the length L3 is preferably 110 μm or more. In order to further shorten the deformation relaxation length, it is preferably 1 mm or more, more preferably 10 mm the above.

The tensile strength and other physical properties of the constituent material of the first intermediate portion 71 are the same as the tensile strength and other physical properties of the constituent material of the first filling portion 14. In addition, the material constituting the first intermediate portion 71 is the same as the material of the first filling portion 14 The same, so the description is omitted here.

＜＜The second middle part＞＞ The second intermediate portion 72 is provided between the first and subsequent segments 12. Therefore, the sheet 12 must be present on the second intermediate portion 72. In addition, although the second intermediate portion 72 is provided between the sheets 12 after the first round, specifically, the second intermediate portion 72 is provided between the sheets 12 after the first round and corresponds to at least the second gap 15. The second area 12E. In addition, the second intermediate portion 72 extends in the width direction DR1 of the winding core 11.

Although the second intermediate portion 72 is provided between the same pieces 12 as the first intermediate portion 71 (for example, between the second round piece 12 and the third round piece 12), the second intermediate portion 72 may also be provided In the 12 different pieces from the first intermediate portion 71.

The maximum thickness T6 (refer to FIGS. 27 and 28) of the second intermediate portion 72 is preferably 0.01 mm or more. If the maximum thickness T6 of the second intermediate portion 72 is 0.01 mm or more, the step difference caused by the fixing member 17 can be effectively alleviated. The maximum thickness T6 is more preferably 0.02 mm or more, 0.03 mm or more, or 0.04 mm or more from the viewpoint of more effectively reducing the above-mentioned level difference. On the other hand, if the maximum thickness T6 is too thick, although the level difference caused by the winding start end 12A can be alleviated, the winding of the sheet 12 may be adversely affected. Therefore, the upper limit of the maximum thickness T6 is preferably 0.2 mm or less or 0.1 mm or less.

The maximum thickness T6 can be measured by the same method as the thickness T2 using a laser displacement meter or a stereo microscope. When measuring the maximum thickness T6 with a laser displacement meter, first, as with the measurement of the thickness T2, etc., the roller body 70 is mounted on the jig and the three laser displacement meters are arranged at the predetermined positions. The body 70 successively releases the sheet 12 until the second intermediate portion 72 is exposed. Then, with the second intermediate portion 72 exposed, the winding core 11 is rotated at a rotation speed of 30 mm/s, and at the same time, the displacement amount is continuously measured with a laser displacement meter at a sampling cycle of 200 μs, and the horizontal axis is the position (mm ), the vertical axis is the chart of displacement (mm). This measurement is performed from the second front end 72B opposite to the first front end 72A on the side of the fixing member 17 of the second intermediate portion 72 toward the first front end 72A. In this measurement, the reference height (a displacement of 0 mm line) is taken as the coil For the height of the core 11, the difference between the reference height and the height of the second intermediate portion 72 is taken as the thickness of the second intermediate portion 72. Then, the difference between the displacement 0 mm line and the displacement at the position with the highest displacement is obtained, thereby obtaining the maximum thickness T6 of the second intermediate portion 72. The resulting chart substantially represents a plane including the longitudinal direction of the sheet and the radial direction of the core. In this graph, one scale on the horizontal axis is 5 mm, and one scale on the vertical axis is 0.02 mm. In FIG. 27, the first tip 72A exists directly above the fixing member 17.

The measurement of the maximum thickness T6 with a stereo microscope can be performed in the following manner. First, the part including the lower sheet 12, the second intermediate portion 72, and the upper sheet 12 is taken out and fixed so as not to be damaged. Then, the cross section of the fixed portion is polished, and the maximum thickness T6 of the second intermediate portion 72 is measured with a stereo microscope (for example, product name "Digital microscope VHX-7000", manufactured by Chines Co., Ltd.).

When the thickness of the second intermediate portion 72 is measured along the long side direction DR2 of the sheet 12, in the long side direction DR2 from the second front end 72B of the second intermediate portion 72 to the maximum thickness T6 of the second intermediate portion 72 The ratio (length L4/maximum thickness T6) of the position length L4 (refer to FIG. 27) to the maximum thickness T6 (refer to FIGS. 27 and 28) of the second intermediate portion 72 is preferably 12 or more. If the ratio is 12 or more, it is possible to suppress residual deformation near the second tip 72B of the second intermediate portion 72. Also, if the thickness of the second intermediate portion is too thick, it may deviate from the perfect circle during winding. However, if the ratio is 12 or more, the second intermediate portion 72 will not be too thick, so that the poor curlability can be suppressed. In addition, if the thickness of the second intermediate portion is too thick, there is also a possibility of new deformation caused by the second intermediate portion. However, if the ratio is 12 or more, the occurrence of such new deformation can be suppressed. The lower limit of the ratio is preferably 25 or more, 50 or more, 75 or more, 100 or more, 125 or more, 150 or more, 175 or more, or 200 or more in terms of shortening the aforementioned deformation relaxation length. From the viewpoint of effectively alleviating the step difference caused by the above-mentioned fixing member, the maximum thickness T6 of the second intermediate portion 72 is preferably thicker, so the upper limit of the ratio is preferably 2000 or less, 1000 or less, 500 or less, or 375 or less. .

From the viewpoint of alleviating the above-mentioned level difference, the length L4 is as long as possible. For example, when the thickness of the sheet 12 is 50 μm or more and 200 μm or less, the length L4 is preferably 5.0 mm or more. In order to further shorten the above-mentioned deformation relaxation length, It is preferably 7.0 mm or more, and still more preferably 9.0 mm or more. However, if the length L4 is too long, it will be difficult to form a convex surface in the region R3 (see FIG. 28) from the second tip 72B to the position of the maximum thickness T6 in the processing. In addition, there is a risk of uneven thickness in the second intermediate portion. Therefore, the surface 72C of the second intermediate portion 72 in the region R3 is likely to become convex, and from the viewpoint of suppressing uneven thickness in the wave shape, the length L4 The upper limit is preferably 20 mm or less.

Like the maximum thickness T6, the length L4 can be obtained from the graph of the position displacement curve. Specifically, first, if there is the second tip 72B of the second intermediate portion 72, the displacement will increase. Therefore, the first position will be found from the graph of the position displacement curve. The first position is the part where the displacement begins to increase. The intersection of the displacement 0mm line and the position displacement curve. Next, draw a virtual line that passes through the position where the displacement amount is the highest and is perpendicular to the line of displacement 0 mm. Then, the intersection of this imaginary line and the line of displacement of 0 mm is taken as the second position, and the distance between the first position and the second position is calculated, thereby obtaining the length L4.

Although the above-mentioned length L4/maximum thickness T6 can generally represent the shape of the second intermediate portion 72, if the surface 72C is to be more appropriately expressed as a convex shape, it is preferable to further use the cross-sectional area of the second intermediate portion 72. Specifically, in the plane including the longitudinal direction DR2 of the sheet 12 and the radial direction DR3 of the core 11 (the plane shown in FIG. 28) from the second leading end 72B to the second intermediate portion 72 at the position of the maximum thickness T6 The ratio (cross-sectional area S3/maximum thickness T6) of the cross-sectional area S3 to the maximum thickness T6 (refer to FIG. 28) of the second intermediate portion 72 is preferably 2.5 or more. If the ratio is 2.5 or more, since the cross-sectional area S3 of the second intermediate portion 72 is greater than the maximum thickness T6, the second intermediate portion 72 can effectively lift the sheet 12, thereby making it possible to further alleviate the above-mentioned level difference. The lower limit of the cross-sectional area S3/maximum thickness T6 is preferably 3.0 or more, 3.5 or more, 4.0 or more, 5.0 or more, 5.5 or more, 6.0 or more, 6.5 or more, or 7.0 or more from the viewpoint of further reducing the above-mentioned level difference. In addition, the upper limit of the cross-sectional area S3/maximum thickness T6 is not particularly limited, and may be, for example, 20.0 or less, 17.5 or less, 15.0 or less, or 12.5 or less, or 10.0 or less. The cross-sectional area S3 is the cross-sectional area of the region R3 of the second intermediate portion 72 (in FIG. 29, the cross-sectional area of the area surrounded by a solid line in the second intermediate portion 72). The product of the thickness at each measurement point and the width between each measurement point in the area from the position to the second position is calculated by adding them up.

The physical properties such as tensile strength of the constituent material of the second intermediate portion 72 are the same as those of the constituent material of the second filling portion 16, and the material constituting the second intermediate portion 72 is the same as the material of the second filling portion 16. The same, so the description is omitted here.

As will be described later, in the radial direction DR3, the sheet 12 (the upper sheet 12) on the outer side of the first intermediate portion 71 or the second intermediate portion 72 can suppress the step or the difference caused by the winding start end 12A of the sheet 12 It is caused by the step difference of the fixing member 17, but in the radial direction DR3, the sheet 12 (the sheet 12 on the lower side) on the inner side (the winding core 11 side) than the first intermediate portion 71 or the second intermediate portion 72 cannot suppress the cause The level difference at the winding start end 12A of the sheet 12 may be caused by the level difference of the fixing member 17. Therefore, the first intermediate portion 71 or the second intermediate portion 72 is preferably arranged as far as possible inside the radial direction DR3 (for example, between the first circle of the sheet 12 and the second circle of the sheet 12, or the second circle of the sheet Between 12 and the third circle of piece 12).

＜＜His roller body＞＞ Regarding the roller body 70, the front end surface 12A1 of the winding start end 12A of the sheet 12 and the second end surface 17B of the fixing member 17 are substantially aligned in the cross section along the longitudinal direction DR2 of the sheet 12 and the radial direction DR3 of the core 11 However, in the roll body 80 shown in FIG. 30, the front end surface 12A1 of the winding start end 12A of the sheet 12 may protrude from the second end surface 17B of the fixing member 17. In this case, not only the second intermediate portion 72 may be inserted in the second area 12E between the pieces 12, but also the third area 12F corresponding to the third gap 21 on the second end surface 17B side between the pieces 12 may be inserted. 3Intermediate part 81.

＜The third intermediate part＞ The third intermediate portion 81 is the same as the second intermediate portion 72 except that it is located in the third region 12F corresponding to the third gap 21, so the description is omitted here.

Although the roller body 70 is provided with the second intermediate portion 72 in the second region 12E between the sheets 12, from the viewpoint of easing the step difference caused by the winding start end portion 12A of the sheet 12, it is The area 12D only needs to be provided with the first intermediate portion 71. Therefore, like the roller body 90 shown in FIG. 31, the second intermediate portion 72 may not be provided in the second area 12E between the sheets 12. In the roller body 90 shown in FIG. 31, the sheets 12 are in close contact with each other in the second area 12E.

Although the roller body 70 is provided with a first intermediate portion 71 in the first area 12D between the sheets 12, from the viewpoint of alleviating the step difference caused by the fixing member 17, a second intermediate portion is provided in the second area 12E between the sheets 12 The portion 72 is sufficient. Therefore, like the roller body 100 shown in FIG. 32, the first intermediate portion 71 may not be provided in the first region 12D between the sheets 12. In the roller body 100 shown in FIG. 32, the sheets 12 are in close contact with each other in the first region 12D.

Although the roller body 70 is provided with the 1st intermediate part 71, you may provide the 1st filling part 14 instead of the 1st intermediate part 71 like the roller body 110 shown in FIG. 33. That is, the first gap 13 can be filled with the first filling part 14, and the second intermediate part 72 can be provided in the second area 12E between the sheets 12.

Although the second intermediate portion 72 of the roller body 110 is provided between the sheet 12 of the second circle and the sheet 12 of the third circle, it may be placed on the sheet 12 of the first circle like the roller body 120 shown in FIG. A second intermediate portion 72 is provided between the sheet 12 and the second circle.

Although the roller body 70 is provided with the 2nd intermediate part 72, like the roller body 130 shown in FIG. 35, the 2nd filling part 16 may be provided instead of the 2nd intermediate part 72. That is, the first intermediate portion 71 may be provided in the first region 12D between the sheets 12 and the second filling portion 16 may be filled in the second gap 15.

Although the roller body 70 is equipped with the fixing member 17 which fixes the sheet 12 to the outer peripheral surface 11A of the core 11, it may not be equipped with the fixing member 17 like the roller body 140 shown in FIG. 36.

Although the thickness of the roll body 70 of the sheet 12 is uniform, it may be formed with a radial direction DR3 toward the core 11 at both ends 12G extending along the longitudinal direction of the sheet 12 like the roll body 150 shown in FIG. 37 A convex part 12H protruding from the outer side. When the viscosity of the filler material (for example, coating material), the first intermediate portion 71, the second intermediate portion 72, or the third intermediate portion 81 is low, or when the thickness of the sheet is uniform, there is a filler material (for example, the coating material Etc.) There is a possibility that fillers etc. may be present in unexpected places due to overflow from between the sheets. On the other hand, by forming convex portions 12H on the two ends 12G of the sheet 12, it is possible to suppress the filling material in the two ends 12G (e.g., after applying the coating material) after disposing the filling material, for example, after applying the coating material. Materials, etc.) overflow. In addition, since the two ends 12G of the sheet 12 are cut off and are not used as products, even if the two ends 12G of the sheet have such protrusions 12H, there will be no problem with the product. The convex portion 12H may be formed by knurling or coating, or may be formed by attaching a tape (for example, a side tape). In the case of coating, the same material as that of the first filling part 14 can be used.

In the roller body 150 shown in FIG. 37, although the convex part 12H is provided in the part of all the two ends 12G of the sheet|seat 12, the convex part 12H may be partly provided. For example, the convex portion 12H may be partially provided at both ends 12G extending along the longitudinal direction of the sheet 12 at positions sandwiching the first intermediate portion 71, and at both ends 12G extending along the longitudinal direction of the sheet 12 The position where the second intermediate portion 72 is sandwiched in the middle, and/or the position where the third intermediate portion 81 is sandwiched among the two end portions 12G extending in the longitudinal direction of the sheet 12. When the convex portion 12H exists in the position where the first intermediate portion 71 is clamped, overflow of the filling material (for example, coating material) or the protrusion of the first intermediate portion 71 can be suppressed. When the convex portion 12H is present in the clamped second intermediate portion In the case of the position of 72, the filling material (for example, coating material) can be prevented from overflowing or the second intermediate portion 72 is protruding, and when the convex portion 12H exists at the position sandwiching the third intermediate portion 81, the filling can be suppressed The material (for example, the coating material) overflows or the third intermediate portion 81 protrudes.

In FIGS. 31 to 36, although the distance D2, length L3, length L4, maximum thickness T6, and cross-sectional area S3 are not shown, when the first intermediate portion 71 exists, the distance D2, length L3, and length L3/ The distance D2 is the same as the case of the roller body 70, and when there is a second intermediate portion 72, the length L4, the length L4/the maximum thickness T6, the cross-sectional area S3/the maximum thickness T6 are the same as the case of the roller body 70.

In addition, in FIGS. 33 and 34, although the surface of the fixing member 17 is all in close contact with the winding start end 12A, it may be the same as the roll body 10 shown in FIG. 8 where the first filling portion 14 enters the roll Between the winding start end 12A and the fixing member 17.

＜＜Method of manufacturing roll body＞＞ The roller body 70 can be manufactured by the following method, for example. First, as shown in FIG. 38(A), the fixing member 17 is arranged on the outer peripheral surface 11A of the winding core 11 along the width direction DR1 of the winding core 11.

After the fixing member 17 is arranged, as shown in FIG. 38(B), the front end surface 12A1 of the winding start end 12A of the sheet 12 is substantially aligned with the second end surface 17B of the fixing member 17, and the fixing member 17 is used to The winding start end 12A of the sheet 12 is fixed to the outer peripheral surface 11A of the winding core 11.

After fixing the winding start end 12A of the sheet 12 to the outer peripheral surface 11A of the winding core 11, as shown in FIG. 38(C), the sheet 12 is wound at least one turn along the outer peripheral surface 11A of the winding core 11. Thereby, the intermediate roller body 73 having the first gap 13 and the second gap 15 can be obtained.

After the intermediate roll body 73 is obtained, as shown in FIG. 39(A), the coating materials 206 and 207 are applied to the surface 12I of the sheet 12 constituting the outer peripheral surface 73A of the intermediate roll body 73 along the width direction DR1 of the core 11. The coating material 206 is applied to at least the first area 12D corresponding to the first gap 13, and the coating material 207 is applied to at least the second area 12E corresponding to the second gap 15. Since the coating materials 74 and 75 are the same as the coating materials 201 and 202, the description is omitted here.

After coating the coating materials 206 and 207, as shown in FIG. 39(B), the sheet 12 is wound around the core 11 again. Since the coating materials 206 and 207 will flow and expand as a result, the coating material 206 will be placed in the first area 12D between the sheets 12, and the coating material 207 will be placed in the second area 12E between the sheets 12, forming a first The intermediate portion 71 and the second intermediate portion 72. Thereby, the roller body 70 can be obtained. In addition, when at least one of the coating materials 206 and 207 is a curable material, after the sheet 12 is wound again, the curable material is cured.

In the manufacturing method of the roller body 70, although the die 210 with the slit 210A is not used for the coating of the coating materials 206 and 207, the die 210 with the slit 210A can also be used as in the first embodiment. Coating of coating materials 206 and 207. In addition, it is also possible to form the first intermediate portion 71 and the second intermediate portion 72 by the same method as in the first embodiment, replacing the coating materials 206 and 207 with a filling sheet.

According to this embodiment, since the first intermediate portion 71 is provided in the first region 12D between the pieces 12, the portion of the piece 12 on the first intermediate portion 71 can be gently lifted toward the front end surface 12A1 side. Thereby, the step caused by the winding start end 12A of the sheet 12 can be effectively alleviated.

According to this embodiment, since the second intermediate portion 72 is provided in the second area 12E between the sheets 12, the portion of the sheet 12 on the second intermediate portion 72 can be lifted gently. Thereby, the step difference caused by the fixing member 17 can be effectively alleviated.

In addition, since the level difference caused by the winding start end 12A of the sheet 12 or the level difference caused by the fixing member 17 can be alleviated, the deformation of the sheet 12 can be suppressed.

If the first filling part is filled in the first gap and the second filling part is filled in the second gap, the first filling part or the second filling part may flow in a portion where no pressure is applied. In contrast, in the present embodiment, since the first intermediate portion 71 or the second intermediate portion 72 is provided between the sheets 12, the material constituting the first intermediate portion 71 or the second intermediate portion 72 does not flow easily and is difficult to overflow . [Example]

In order to explain the present invention in detail, examples are given below for description, but the present invention is not limited to these descriptions. Fig. 40(A) is a graph showing the displacement of the roller body of Example 7 relative to the periphery of the first filling portion, and Fig. 40(B) is a graph showing the amount of displacement of the roller body of Example 8 relative to the periphery of the first filling portion Fig. 40(C) is a graph showing the displacement of the roller body of Example 9 with respect to the position of the periphery of the first filling part.

＜Preparation of composition for hard coating＞ First, each component is blended so that it may become a composition shown below, and the composition 1 for hard-coat layers is obtained.

(Composition 1 for hard coat layer) ・Neopentaerythritol triacrylate (product name "KAYARAD-PET-30", manufactured by Nippon Kayaku Co., Ltd.): 60 parts by mass ・Photopolymerization initiator (1-hydroxycyclohexyl phenyl ketone, product name "Omnirad 184", manufactured by IGM Resins B.V.): 5 parts by mass ・Polysiloxane-based leveling agent (product name "SEIKABEAM10-28", manufactured by Dainichi Seiki Kogyo Co., Ltd., solid content 10%): 0.1 parts by mass ・Silica particles (product name "SIRMIBK-H84", manufactured by CIK-NANO TEK Co., Ltd., average particle size 30nm, solid content 30%): 3 parts by mass ・Methyl isobutyl ketone (MIBK): 80 parts by mass ・Cyclohexanone: 20 parts by mass

<Example 1> First, on the outer peripheral surface of a cylindrical core made of fiber-reinforced plastic with an inner diameter of 153mm, an outer diameter of 167mm and a width of 1600mm, a rectangle with a length of 1380mm, a width of 20mm and a thickness of 10μm is attached along the core width direction as a fixing member Double-sided tape.

After attaching the double-sided tape, the winding core is held by the clamping member of the winding device and fixed to the winding device. Then, in a manner of contacting the first end surface and the second end surface of the double-sided tape extending in the width direction of the core, at 25°C, two single-liquid curable silicone resin compositions (product name "Hapio Seal PRO HG", manufactured by Kanpe Hapio Co., Ltd.) as a coating material. The color of the silicone resin composition is gray. In addition, the shear viscosity of the silicone resin composition during coating is 180 Pa·s, respectively. The silicone resin composition is along the width direction of the core and the coating amount per unit width is 1 cm ³ /m. It is coated in a straight line.

Then, an acrylic resin film with a length of 3000m, a width of 1340mm and a thickness of 80μm (in-plane retardation Re: 5nm), which is a sheet, was affixed to the double-sided tape along the core width direction at the winding start end in the longitudinal direction. The acrylic resin film is fixed on the outer peripheral surface of the winding core. In addition, the acrylic resin film is arranged such that the front end surface of the acrylic resin film in the longitudinal direction of the winding start end is in contact with the silicone resin composition, and is approximately aligned with the second end surface of the double-sided tape in the radial direction of the core. .

Then, all the acrylic resin film is wound on the core by a winding device, and the first gap between the core and the first turn of the acrylic film and in contact with the end surface of the acrylic resin film before the winding start end is filled. The silicone resin composition is filled with the silicone resin composition in the second gap located between the winding core and the first turn of the acrylic resin film and in contact with the first end surface of the double-sided tape. In this way, a roller body is obtained. In the roller body, the silicone resin composition is hardened to form a first filling portion with a length of 20mm, a width of 1340mm and a maximum thickness of 300μm filled in the first gap and a length of 20mm, width of 1340mm and maximum thickness filled in the second gap 300μm second filling part.

The shear viscosity of the silicone resin composition was measured using a dynamic viscoelasticity measuring device manufactured by Anton Paar Japan Co., Ltd. Specifically, the shear viscosity of the silicone resin composition is obtained by measuring the shear viscosity at a shear rate of 1 [1/s] at 25°C using a parallel plate with a diameter of 25 mm. The viscosity of the silicone resin composition is measured by measuring the viscosity of the silicone resin composition 10 times. The maximum and minimum values are removed from the 10 measured viscosities, and the arithmetic average of the remaining 8 shear viscosities is obtained. Obtained by this. The shear viscosity of the coating materials used in the other examples below were also measured in the same manner as in Example 1.

The in-plane retardation Re of the acrylic resin film was measured using a retardation film/optical material inspection device (product name "RETS-100", manufactured by Otsuka Electronics Co., Ltd.). Specifically, first, in order to stabilize the light source of RETS-100, after turning on the light source, let it stand for more than 60 minutes. Then, the rotating analyzer method is selected, and the θ mode (angle direction phase difference measurement mode) is selected. The stage becomes an inclined rotating stage due to the selection of this θ mode.

5mm ・傾斜角度範圍：－40°～40° ・測定波長範圍：400nm～800nm ・樣品之平均折射率：1.5 ・厚度：80μmNext, enter the following measurement conditions in RETS-100. (Measurement conditions) ・Delay measurement range: Rotating analyzer method ・Measurement point diameter:

5mm ・Inclination angle range: -40°～40° ・Measurement wavelength range: 400nm～800nm ・Average refractive index of sample: 1.5 ・Thickness: 80μm

Then, without setting the sample under this device, get background information. The device is set to a closed system, and this action is implemented every time the light source is turned on.

Then, set the sample on the stage in the device. The size of the sample is set to 50mm×50mm.

After setting the sample, in an environment with a temperature of 23°C and a relative humidity of 50%, the stage is rotated 360° on the XY plane to measure the fast axis and the slow axis. After the measurement is over, select the slow axis. Then, with the slow axis as the center, the stage is tilted to the set angle range, and measurement is performed at the same time, and the data (Re) of the set tilt angle range and the set wavelength range are obtained every 10°. The in-plane phase difference Re is measured at 5 points at different positions. Specifically, as shown in FIG. 2, a total of 5 points were measured at the center A1 and points A2 to A4 of the sample. Then, remove the maximum and minimum values from the measured values at 5 points, and use the arithmetic average of the remaining 3 points as the in-plane phase difference Re.

<Example 2> In Example 2, in addition to the use of a two-component curable silicone rubber composition (product name "KE-24", manufactured by Shin-Etsu Chemical Co., Ltd.) instead of the polymer used to form the first filling part and the second filling part The roller body was obtained in the same manner as in Example 1 except for the silicone resin composition. The silicone rubber composition is white when mixed, and the shear viscosity of the silicone rubber composition when it is coated is 75 Pa·s.

<Example 3> In Example 3, in addition to using a two-component curable silicone rubber composition (product name "ELASTOSIL (registered trademark) M 4503", manufactured by Wacker Asahikasei Silicone Co., Ltd., condensation hardening) instead of forming the first The roller body was obtained in the same manner as in Example 1 except for the silicone resin composition of the filling part and the second filling part. The silicone rubber composition is white when mixed, and the shear viscosity of the silicone rubber composition when it is coated is 40 Pa·s. In addition, this silicone rubber composition does not contain volatile components or contiguous components.

In a 90° peel test in which the constituent material of the first filling portion in the roll body of Example 3 was peeled perpendicularly to the outer peripheral surface of the core at a peeling speed of 10 mm/min, the constituent material was peeled off with a tensile force of 0.2N.

The above-mentioned 90° peel test was performed using a sample and a spring tension meter (manufactured by Oba Keiki Co., Ltd.). Specifically, first prepare a mold larger than the sample size, and arrange this mold on the outer peripheral surface of the core. Then, a two-component curable silicone rubber composition (product name "ELASTOSIL (registered trademark) M 4503", manufactured by Wacker Asahikasei Silicone Co., Ltd., condensation hardening) is injected into this mold and cured to obtain a material Floor. Then, the material layer was removed from the mold, and the material layer was cut into a size of 20 mm×100 mm by a cutting machine to obtain a sample set on the outer peripheral surface of the core. Then, one end of the sample was held by a spring tension meter, and the tensile force was measured under an environment of temperature 25°C and relative humidity 50%. At the same time, the aforementioned end was pulled up vertically with respect to the outer peripheral surface of the core at a peeling speed of 10mm/ The sample is peeled off in seconds. Then, remove the sample with the largest tensile force and the sample with the smallest tensile force from the 10 samples subjected to the 90° peel test, and use the arithmetic average of the tensile forces of the remaining 8 samples as the tensile force of the above-mentioned constituent materials.

The tensile strength of the constituent material of the first filling portion in the roll body of Example 3 was 3.5 MPa, the elongation at break was 450%, and the tear strength was 12.0 N/mm. In addition, the hardness of the constituent material of the first filling part measured by Durometer type A was 28°, and the linear shrinkage rate of the constituent material of the first filling part was 0.10%.

The tensile strength of the constituent material of the first filling part is measured in accordance with JIS K6251:2017, using a sample and Tensilon universal testing machine (product name "RTC-1310A", manufactured by Iontech Co., Ltd.). Specifically, first, a mold larger than the sample size is prepared, and the mold is placed on the outer peripheral surface of the core. Then, the two-component curable silicone rubber composition (product name "ELASTOSIL (registered trademark) M 4503", manufactured by Wacker Asahikasei Silicone Co., Ltd., condensation hardening) used to form the first filling part is injected into the mold , Make it harden, and get the material layer. Then, the material layer is removed from the mold, and the material layer is punched into a dumbbell-shaped No. 2 shape as described in JIS K6251: 2017 by using a stretched No. 2 dumbbell-shaped punching blade manufactured by Kobe Keiki Co., Ltd. Size, and get the sample. Then, the sample was kept at 25°C for 24 hours. Then, one of the above-mentioned Tensilon universal testing machines is used to grasp the both ends of the sample in the longitudinal direction of the clamps, and the initial distance between clamps is 20mm and the tensile speed is 100mm/min under the environment of temperature 25℃ and relative humidity 50%. Condition to conduct a tensile test to determine the tensile strength of the sample. Then, remove the maximum and minimum values from the 10 samples, and use the arithmetic average of the tensile strength of the remaining 8 samples as the tensile strength of the above-mentioned constituent materials.

The elongation at break of the constituent material of the first filling part is based on JIS K6251:2017, using a sample and Tensilon universal testing machine (product name "RTC-1310A", manufactured by Iande Co., Ltd.), and the tensile strength The measurement method is measured in the same way. Then, the maximum and minimum values are removed from the 10 samples, and the arithmetic average of the elongation at break of the remaining 8 samples is taken as the elongation at break of the above-mentioned constituent material.

The tear strength of the constituent material of the first filling part is based on JIS K6252: 2007, using a sample and Tensilon universal testing machine (product name "RTC-1310A", manufactured by Iande Co., Ltd.), and tensile strength The measuring method of intensity is measured in the same way. Then, the maximum and minimum values are removed from the 10 samples, and the arithmetic average of the tear strength of the remaining 8 samples is used as the tear strength of the above-mentioned constituent materials.

The constituent material of the first filling part is measured with Durometer type A hardness, which is measured in accordance with JIS K6253:1997. Specifically, first, a mold larger than the sample size is prepared, and the mold is placed on the outer peripheral surface of the core. Then, the two-component curable silicone rubber composition (product name "ELASTOSIL (registered trademark) M 4503", manufactured by Wacker Asahikasei Silicone Co., Ltd., condensation hardening) used to form the first filling part is injected into the mold , And harden it as necessary to obtain a material layer. Then, the material layer is removed from the mold, and the material layer is cut by a cutting machine or the like to obtain a sample with a size of 100 mm×100 mm and a thickness of 10 mm. Then, using Durometer type A (product name "GS-719N (TYPEA)", manufactured by Teclock Co., Ltd.), the hardness was measured in an environment with a temperature of 25°C and a relative humidity of 50%. Then, the maximum and minimum values are removed from the 10 samples, and the arithmetic average of the hardness of the remaining 8 samples is taken as the hardness of the above-mentioned constituent materials.

The linear shrinkage rate of the first filling part can be measured in the following manner. First, prepare a mold with a thickness of 2mm and a size of 130mm square to form the two-component curable silicone rubber composition of the first filling part (product name "ELASTOSIL (registered trademark) M 4503", Wacker Asahikasei Silicone Co., Ltd.) Company-made, condensation hardening) is injected into this mold and hardened to obtain a sample (molded product). After being completely cured, measure the size of the sample and compare it with the size of the inside of the mold, and calculate the linear shrinkage rate based on JIS K6249:2003. The maximum and minimum values are removed from the 10 samples, and the arithmetic average of the linear shrinkage rates of the remaining 8 samples is used as the linear shrinkage rate of the aforementioned constituent materials.

<Example 4> In Example 4, in addition to using a two-component curable silicone rubber composition (product name "ELASTOSIL (registered trademark) M 4601", manufactured by Wacker Asahikasei Silicone Co., Ltd., addition reactivity) instead of forming the first The roller body was obtained in the same manner as in Example 1 except for the silicone resin composition of the first filling part and the second filling part. The silicone rubber grease composition is white when mixed, and the shear viscosity of the silicone rubber composition when it is coated is 20 Pa·s.

<Example 5> In Example 5, in addition to using a two-component curable urethane resin composition (product name "human skin gel", manufactured by exseal Co., Ltd.) instead of the polysilicon used to form the first filling part and the second filling part Except for the oxygen resin composition, the roll body was obtained in the same manner as in Example 1. The urethane resin composition is white when mixed, and the shear viscosity of the urethane resin composition when it is coated is 6.5 Pa·s.

<Example 6> First, on the outer peripheral surface of a cylindrical core made of fiber reinforced plastic with an inner diameter of 153mm, an outer diameter of 167mm and a width of 1600mm, a rectangle with a length of 1380mm, a width of 20mm and a thickness of 10μm is attached along the width of the core as a fixing member. Double-sided tape.

After attaching the double-sided tape, the winding core is held by the clamping member of the winding device and fixed to the winding device. Then, a polyethylene terephthalate film (PET film, in-plane retardation Re: 1000 nm, Nz coefficient: 20) with a length of 3000m, a width of 1490mm, and a thickness of 80μm as a sheet was wound at the start end in the longitudinal direction It is attached to the double-sided tape along the width direction of the core, and the PET film is fixed to the outer peripheral surface of the core.

Then, the PET film was wound up one turn by the winding device to obtain an intermediate roll body. In the intermediate roller body, a first gap is formed between the core and the first round of PET film and is in contact with the front end of the winding start end of the PET film, and is located between the core and the first round of PET film and is in contact with the PET film. The second gap where the first end face of the double-sided tape is in contact.

After the intermediate roll body is obtained, a single-liquid curable silicone resin composition (product name "Hapio Seal PRO") is applied to the surface of the PET film constituting the outer peripheral surface of the intermediate roll body in the width direction of the core under an environment of 25°C. HG", manufactured by Kanpe Hapio Co., Ltd.) as a coating material. The viscosity of the silicone resin composition during coating is 180 Pa·s, respectively, and the silicone resin composition is coated in a linear shape ^{along the core width direction with a coating amount per unit width of 1 cm 3 /m.} Specifically, the silicone resin composition system is applied to the first area corresponding to the first gap and the second area corresponding to the second gap, respectively.

After the silicone resin composition is coated, all the PET films are wound around the core again by the winding device, so that the silicone resin composition is located between the first area and the second area between the PET films. In this way, a roller body is obtained. In the roller body, the silicone resin composition is cured to form a first intermediate portion with a length of 20 mm, a width of 1340 mm, and a maximum thickness of 300 μm in the first region provided between the PET films, and the first intermediate portion provided between the PET films. The 2nd zone has a length of 20mm, a width of 1340mm, and a second intermediate part with a maximum thickness of 300μm.

The in-plane retardation Re of the PET film used in Example 6 was measured in the same manner as the in-plane retardation Re of the acrylic resin film used in Example 1. However, in this case, let the average refractive index N of the sample be 1.617.

<Example 7> In Example 7, an acrylic resin film with a length of 3000m, a width of 1340mm and a thickness of 85μm was used as a sheet. Specifically, a laminate composed of an acrylic resin film and a hard coat layer was used. The silicone rubber composition forming the first filling part and the second filling part is coated in a straight line along the width direction of the core and the coating amount per unit width is 0.3 cm ³ /m. Other than that, the rest The roll bodies were all obtained in the same manner as in Example 3.

The above-mentioned build-up system is formed in the following manner. First, using a continuous coater, the acrylic resin film with a length of 3000m, a width of 1340mm and a thickness of 80μm used in Example 1 was sent from the unwinding roll to the coating section of the first unit, and the hard coat composition 1 was applied. , And the formation of a coating film. Then, the coating film is dried in the drying section at a temperature of 70°C for 60 seconds to evaporate the solvent in the coating film, and ^{ultraviolet rays are irradiated in the curing section so that the cumulative light amount becomes 150mJ/cm 2} to harden the coating film, thereby forming a film A hard coat layer with a thickness of 5.0 μm and a width of 1300 mm was applied to obtain a laminated body with a length of 3000 m and a thickness of 85 μm through continuous film formation.

<Example 8> In Example 8, except that the silicone rubber composition used to form the first filling part and the second filling part was used along the core width direction and the coating amount per unit width was 0.5 cm ³ The roll body was obtained in the same manner as in Example 7 except that it was coated in a straight line by the method of /m.

<Example 9> In Example 9, except that the silicone rubber composition used to form the first filling part and the second filling part was applied along the core width direction and the coating amount per unit width was 0.8 cm ³ The roll body was obtained in the same manner as in Example 7 except that it was coated in a straight line by the method of /m.

<Example 10> In Example 10, except that the silicone rubber composition used to form the first filling part and the second filling part was coated in a straight line so that ^{the coating amount per unit width was 1 cm 3 /m} Otherwise, the roll body was obtained in the same manner as in Example 9.

<Example 11> In Example 11, except that the shear viscosity of the two-component curable silicone rubber composition used to form the first filling part and the second intermediate part was set to 2 Pa·s, and the Except that the coating amount per unit width was set to 1.5 cm ³ /m, the rest was the same as in Example 9 to obtain a roll body.

<Example 12> In Example 12, except that the shear viscosity of the silicone rubber composition used to form the first filling part and the second intermediate part was set to 6.5 Pa·s, and the width per unit width Except that the coating amount was set to 1.2 cm ³ /m, the rest was the same as in Example 9 to obtain a roll body.

<Example 13> First, a cylindrical winding core made of fiber reinforced plastic with an inner diameter of 153 mm, an outer diameter of 167 mm, and a width of 1600 mm was held by the clamping member of the winding device and fixed to the winding device. Then, in an environment of 25°C, a two-component curable silicone rubber composition (product name "ELASTOSIL (registered trademark) M 4503", manufactured by Wacker Asahikasei Silicone Co., Ltd., Condensation hardening) as a coating material. The viscosity of the silicone rubber composition when it is coated is 180 Pa·s, and the silicone rubber composition is coated in a straight line ^{along the width direction of the core and the coating amount per unit width is 1 cm 3 /m.}

Then, with a separation distance of 3mm between the double-sided tape and the two-component curable silicone rubber composition, a rectangular double-sided tape with a length of 1380mm, a width of 20mm and a thickness of 10μm was attached along the width direction of the core as a fixing member. Noodles. The separation distance is measured at 10 locations, the maximum and minimum values are removed from the measured separation distances at 10 locations, and the arithmetic average of the separation distances at the remaining 8 locations is obtained by this. In the following embodiments, the separation distance is also obtained in this way.

Then, as a sheet, a laminate with a length of 3000m, a width of 1340mm and a thickness of 85μm, which was the same as in Example 7, was attached to the double-sided tape along the width direction of the core at the winding start end of the laminate to fix the laminate On the outer circumference of the core. In addition, the laminated system is configured such that the front end surface of the laminated body in the longitudinal direction of the winding start end is in contact with the silicone rubber composition and is substantially aligned with the second end surface of the double-sided tape in the radial direction of the core.

Then, the layered body is wound on the winding core by the winding device, and silicone rubber is filled in the first gap between the winding core and the first-turn layered body and in contact with the front end of the winding start end of the layered body. Composition.

Then, the layered body was wound up by one turn by the winding device to obtain an intermediate roll body. In the intermediate roll body, a second gap is formed between the winding core and the first loop layered body and is in contact with the first end surface of the double-sided belt.

After the intermediate roll body is obtained, a two-component curable silicone rubber composition (product name "ELASTOSIL (registered Trademark) M 4503", manufactured by Wacker Asahikasei Silicone Co., Ltd., condensation hardening) is used as a coating material. The viscosity of the silicone rubber composition when it is coated is 180 Pa·s, and the silicone rubber composition is coated in a straight line ^{along the width direction of the core and the coating amount per unit width is 1 cm 3 /m.} Specifically, the silicone rubber composition is applied to the second area corresponding to the second gap.

After coating the silicone rubber composition, all the laminates are wound around the core again by the winding device, so that the silicone rubber composition is interposed in the second area between the laminates. In this way, a roller body is obtained. In the roller body, the silicone rubber composition is cured separately, and a first filling part with a width of 1340 mm is formed in the first gap, and a second intermediate part with a width of 1340 mm is formed in the second area between the laminated bodies.

<Example 14> Except in Example 12, a two-component curable silicone rubber composition (product name "ELASTOSIL (registered trademark) M 4601", manufactured by Wacker Asahikasei Silicone Co., Ltd., addition reactivity) was used instead to form the first 1 Except for the two-component curable silicone rubber composition of the filling part and the second intermediate part (product name "ELASTOSIL (registered trademark) M 4503", manufactured by Wacker Asahikasei Silicone Co., Ltd., condensation hardening), the rest are all with In Example 11, a roll body was obtained in the same manner. The shear viscosity of the silicone rubber composition when it is coated is 10Pa·s.

<Example 15> In Example 15, the shear viscosity of the two-component curable silicone rubber composition used to form the first filling part and the second intermediate part was set to 10 Pa·s, and the The coating amount per unit width was set to 0.8 cm ³ /m, and the separation distance between the double-sided tape and the two-component curable silicone rubber composition was set to 3 mm, and the rest were obtained in the same manner as in Example 13. Roller body.

<Example 16> In Example 16, except that the shear viscosity of the two-component curable silicone rubber composition used to form the first filling part and the second intermediate part was set to 10 Pa·s, and the The coating amount per unit width was set to 1.2 cm ³ /m, and the separation distance between the double-sided tape and the two-component curable silicone rubber composition was set to 3 mm, and the rest were obtained in the same manner as in Example 13. Roller body.

＜Comparative example 1＞ In Comparative Example 1, a roll body was obtained in the same manner as in Example 1, except that the coating material was not applied.

＜Comparative example 2＞ In Comparative Example 2, a roll body was obtained in the same manner as in Comparative Example 1, except that the laminate used in Example 7 was used instead of the acrylic resin film.

For the roll bodies of Examples 1 to 16, the edge thickness T1 of the first filling portion was measured. The edge thickness T1 is measured using a scanning optical interference surface profile measuring machine (product name "New View7300", manufactured by SEG). Specifically, first, when all films or laminates such as acrylic resin films or PET films are discharged one after another, the first filling portion may adhere to the laminate side and peel off from the core. Then, one or more samples including the size of 2 mm×5 mm of the first filling portion were cut out from the laminate. The sample includes the front end of the first filling part, and is cut off from any part where dirt or fingerprints are not attached. Then, the edge thickness T1 of the first filling portion was measured under the following measurement conditions. The edge thickness T1 is obtained by measuring the edge thickness at 10 locations, removing the maximum and minimum values from the measured thickness at 10 locations, and obtaining the arithmetic average of the thicknesses at the remaining 8 locations. (Measurement conditions) ・Objective lens: 10 times ・Zoom: 1 times ・Measurement area: 2.17mm×2.17mm ・Scan length: 5μm ・Minimum modulus (min mod): 0.015 ・Temperature: 23℃ ・Relative humidity: 50%

＜Deformation relaxation length measurement＞ For the roll bodies of the Examples and Comparative Examples, the step at the winding start end of the film or laminate, such as an acrylic resin film or PET film, and the length at which the step at which the double-sided tape was relaxed were measured, respectively. Specifically, since the level difference gradually decreases from the winding start end to the winding end end, the continuous discharge length (m) of the film or laminate is first measured and simultaneously discharged to the point where the level difference can be recognized. Then, the film or laminate is cut off at a spot where the level difference can be recognized. In the state where the polyvinyl alcohol film is attached to the cut part of the film or laminate, in an indoor environment of 800 Lux or more and 2000 Lux or less, the white LED lamp is reflected on the film or laminate. Make a visual observation. Then, the distance from the point where the level difference cannot be recognized to the end of the winding start is measured, and this distance is used as the strain relaxation length. Here, if the contour line of the white LED lamp mapped on the film or laminate is compared with other parts of the film or laminate and has a skewed part, it is judged that there is a step difference, and it can be judged that there is a step difference. If the contour line of the white LED lamp mapped in the periphery is the same as the other parts of the film or laminate, it is judged that there is no step difference. The white LED lamp is arranged such that the long side direction of the white LED lamp is along the long side direction of the film or laminate. The length of the white LED lamp is set to span the length of the part where the step difference exists and the part where the step difference does not exist in the film or laminate. When observing, appropriately select the line that can clearly see the white LED light, and form a state where the white LED light is mapped on the film or laminate and the outline of the white LED light can be seen. In addition, visual observation is performed from all angles (-180° to 180°) based on the normal direction of the surface of the film or laminate (0°).

<Confirm the existence of the fourth intermediate part> In Examples 3 and 7 to 16, it was confirmed whether there was a fourth intermediate portion at the winding start end. Specifically, first, the layered body is successively discharged from the roller body to the layered body whose surface is the second turn. Then, with regard to the roller body with the layered body of the second turn as the surface, the vicinity of the winding start end was visually observed, and it was observed whether there was a colored portion at the winding start end. Then, when there is a colored portion at the winding start end, it is determined that there is a fourth intermediate portion, and when there is no colored portion, it is determined that there is no fourth intermediate portion. The number of observers is set to 15, and when all observers think that there is a colored part at the winding start end, it is judged that there is a fourth intermediate part.

＜L1, L1＋L2, T2, S1, S1＋S2, IL3 slope measurement＞ In the roll bodies of Examples 3 and 7 to 16, when the presence of the fourth intermediate portion was not confirmed, the length L1, thickness T2, and area S1 were measured, and the length L1/thickness T2, area S1/thickness T2 was determined. Also, when the presence of the fourth intermediate portion is confirmed, measure the length L1 + length L2, thickness T1, T2, area S1 + area S2, and obtain (length L1 + length L2)/thickness T2, (area S1 + area S2)/ Thickness T2. In addition, the lengths L1, L2, thickness T2, areas S1, S2 mean the parts shown in FIGS. 4-8.

Specifically, first, prepare a jig for rotating the roller body and a laser displacement meter (product name "LK-G30", manufactured by Chiensi Co., Ltd.), and arrange them in predetermined positions. The jig is inserted into the hole in the width direction of the roll core to rotatably hold the roll body.

Three laser displacement meters are arranged above the roller body and irradiate laser light toward the surface of the roller body. The location of the laser displacement meter is set as follows. First, determine the first position and the second position where the width of the laminate is divided into three equal parts. The first position is on the first end side of the laminate in the short-side direction, and the second position is on the second end side opposite to the first position. Then, the first laser displacement meter is arranged so that the laser light is irradiated to the midpoint between the first position and the first end, and the second laser displacement meter is arranged so that the laser light is irradiated to the midpoint between the first position and the second position. The third laser displacement meter is arranged so that the laser light irradiates the middle point between the second position and the second end.

Then, the roller body was attached to the jig, and the acrylic resin film was successively discharged from the roller body until the first filling part was exposed. Then, in the state where the first filling part is exposed, the core is rotated at a rotation speed of 30mm/s under an environment with a temperature of 23°C and a relative humidity of 50%. At the same time, the laser displacement meter is used to continuously rotate the core at a sampling period of 200μs. Measure the displacement, and obtain a graph with the horizontal axis as the position (mm) and the vertical axis as the displacement (mm) (see Fig. 40(A) to Fig. 40(C)). This measurement is carried out from the front end of the first filling part toward the position where it is in contact with the front end surface. In this measurement, the reference height (displacement 0mm line) is taken as the height of the winding core, and the height between the winding core and the first filling part The difference is taken as the thickness of the first filling part. The resulting chart substantially represents a plane including the longitudinal direction of the sheet and the radial direction of the core. In this graph, one scale on the horizontal axis is 5 mm, and one scale on the vertical axis is 0.02 mm.

In this chart, set the position on the displacement curve at which the displacement begins to drop sharply as the position E1. Then, when the presence of the fourth intermediate portion is not confirmed, the thickness T2 of the position in contact with the front end surface of the first filling portion is obtained by calculating the displacement difference between the 0 mm displacement line and the position E1.

When the presence of the fourth intermediate portion is confirmed, the thickness T2 can be measured by the following method. First, a sample of 2 cm×2 cm in size including this part is taken out and fixed so that the part including the winding start end 12A, the first filling part 14 and the second turn of the sheet 12 is not damaged. Then, the cross-section of the fixed sample was polished, and the first measurement was performed with a stereo microscope (product name "Digital microscope VHX-7000", manufactured by Chines Co., Ltd.) under an environment with a temperature of 23°C and a relative humidity of 50%. The thickness of the filling part is T2. The thickness T2 is measured with a stereo microscope, and the coaxial epi-illumination is selected as the illumination of the digital microscope (Digital microscope), with a magnification of 500 times, using dark field and reflected light.

In addition, when the presence of the fourth intermediate portion is not confirmed, the length L1 is obtained from the graph of the positional displacement curve in the same manner as the thickness T2. Specifically, first, the position E1 described above is set from the graph, and the intersection of the displacement amount 0 mm line and the position displacement curve in the position where the displacement amount starts to rise is set as the position E2. Next, through the above-mentioned position E1, draw an imaginary line IL4 perpendicular to the line of displacement of 0 mm. Then, the intersection of the virtual line IL4 and the displacement 0 mm line is set as the position E3, and the distance between the position E2 and the position E3 is obtained, thereby obtaining the length L1. The area S1 is calculated by obtaining the product of the thickness at each measurement point and the width between each measurement point in the area from the position E2 to the position E3 described above, and adding them together. In addition, based on the above equation (3), the width between the measurement points was calculated from the sampling cycle, the core rotation speed, and the outer diameter of the core, and the result was 6.24 μm. When the presence of the fourth intermediate portion is confirmed, calculate the length L1 + length L2 in the same manner as the length L1 when the presence of the fourth intermediate portion is not confirmed.

Then, when the presence of the fourth intermediate portion is not confirmed, the obtained length L1, thickness T2, and area S1 are used to obtain length L1/thickness T2, area S1/thickness T2. Also, when the presence of the fourth intermediate portion is confirmed, use the total of the obtained length L1 and the length L2, the thickness T2, the total of the area S1 and the area S2 to obtain (length L1 + length L2)/thickness T2 (Area S1 + area S2)/thickness T2.

Also, in the above-mentioned graph, draw a virtual line IL3 passing through the position E1 and the position E2 (refer to FIGS. 40(A) to 40(C)), and obtain the inclination of the virtual line IL3.

＜L4, T6, S3 measurement＞ For the roll bodies of Examples 13 to 16, the length L4, the maximum thickness T6, and the cross-sectional area S3 were measured, and the length L4/the maximum thickness T6 and the cross-sectional area S3/the maximum thickness T6 were determined. In addition, the length L4 and the maximum thickness T6 mean the part shown in FIG. 27, and the cross-sectional area S3 means the part shown in FIG. 29. The length L4, the maximum thickness T6, and the cross-sectional area S3 are measured using a jig for rotating the roller body and a laser displacement meter (product name "LK-G30", manufactured by Chines Co., Ltd.). Specifically, first, as in the measurement of the length L1, etc., the roller body is mounted on the jig and the three laser displacement meters are arranged at predetermined positions, and then the laminated body is successively discharged from the roller body until the second room is exposed. unit. Then, with the second intervening part exposed, the winding core is rotated at a rotation speed of 30mm/s under an environment with a temperature of 23°C and a relative humidity of 50%. At the same time, it is continuously measured by a laser displacement meter with a sampling cycle of 200μs. Displacement, and get a graph with the horizontal axis as the position (mm) and the vertical axis as the displacement (mm). This measurement is carried out from the second front end opposite to the first front end on the double-sided tape side of the second intermediate portion toward the first front end. In this measurement, the reference height (a line with a displacement of 0 mm) is taken as the height of the winding core. The height difference between the core and the second intermediate portion is taken as the thickness of the second intermediate portion. The resulting chart substantially represents a plane including the longitudinal direction of the sheet and the radial direction of the core. In this graph, one scale on the horizontal axis is 5 mm, and one scale on the vertical axis is 0.02 mm.

In this graph, by finding the position with the highest displacement amount, the displacement difference between the 0mm displacement line and the position is calculated to find the maximum thickness T6 in the second intermediate portion.

In addition, from the graph, find the first position, which is the intersection of the displacement 0 mm line and the position displacement curve in the position where the displacement starts to rise. Next, draw a virtual line perpendicular to the 0mm line of the displacement through the position with the highest displacement. Then, the intersection of this imaginary line and the line of displacement of 0 mm is taken as the second position, and the distance between the first position and the second position is obtained, thereby obtaining the length L4. The cross-sectional area S3 is calculated by obtaining the product of the thickness at each measurement point and the width between each measurement point in the region from the first position to the second position, and adding them together. In addition, based on the above equation (3), the width between the measurement points was calculated from the sampling cycle, the core rotation speed, and the outer diameter of the core, and the result was 6.24 μm.

Furthermore, using the obtained length L4, the maximum thickness T6, and the cross-sectional area S3, the length L4/the maximum thickness T6 and the cross-sectional area S3/the maximum thickness T6 are determined.

Hereinafter, the results are shown in Tables 1 to 3. [Table 1]

[Table 2]

[table 3]

In the roll body of Comparative Example 1, the deformation relaxation length of the winding start end portion and the deformation relaxation length of the double-sided belt were both long. This is considered to be because the first gap is a hole, which is caused by the large step difference at the winding start end of the acrylic resin film, and because the second gap is a hole, it is caused by the large step difference of the double-sided tape. . In contrast, the roll bodies of Examples 1 to 12 have a shorter deformation reduction length at the winding start end and a double-sided belt than the roll body of Comparative Example 1. This is considered to be because in the roll bodies of Examples 1 to 5 and 7 to 15, the first gap is filled with the first filling part, so the acrylic resin film has a small step at the start end of the winding and is in the second gap. The second filling portion or the second intermediate portion is filled with the area corresponding to the second gap, which is due to the small step difference of the double-sided tape. In addition, it is considered that in Example 6, the first intermediate portion is located between the first area corresponding to the first gap, so that the step at the start end of the winding of the PET film is small, and the second intermediate portion is located between The second area corresponding to the second gap is due to the small step difference of the double-sided tape.

The first filling part of the roll bodies of Examples 3 and 8-16 has a length L1/thickness T2 or (length L1 + length L2)/thickness T2 of 90 or more, and/or area S1/thickness T2 or (area S1 + area S2) )/Thickness T2 is 3.0 or more, so compared to the roll body of Example 7 in which the length L1/thickness T2 is less than 90, the deformation relaxation length at the winding start end is shorter.

Since the length L4/maximum thickness T6 of the second intermediate portion of the roll bodies of Examples 13 to 16 is 12 or more, and/or the cross-sectional area S3/maximum thickness T6 is 2.5 or more, the deformation relaxation length of the double-sided belt is short.

In the roll bodies of Examples 1, 2, 6, and 13, since the shear viscosity of the silicone resin composition or silicone rubber composition during coating is above 60 Pa·s, no matter when the coating is applied or when the roll is applied, the shear viscosity of the silicone resin composition or silicone rubber composition is above 60 Pa·s. In the case of the closing pressure, it was not confirmed that the above-mentioned composition overflowed from between the core and the acrylic resin film or the PET film. For the roll bodies of Examples 3, 4, 7-10, the shear viscosity of the composition during coating is less than 60 Pa·s, but above 15 Pa·s, so there is no overflow during coating, but it is not In the case of stress, it was confirmed that the composition overflowed. In Examples 5, 11, 12, and 14-16, since the shear viscosity of the composition at the time of coating did not reach 15 Pa·s, it was confirmed that the composition overflowed between the core and the acrylic resin film.

In addition, a secondary workability test was performed on the roll body of Example 3. Specifically, first, the acrylic resin film is unrolled to expose the first filled portion. Then, try to use a blade to make a trigger at the end of the first filling part without damaging the winding core, and slowly peel off the first filling part from the winding core with your fingers. The evaluation criteria of the secondary workability are good when the first filling part is cleanly peeled off, and bad when a part of the first filling part remains in the core due to breakage or the like. In this evaluation, the first filling part of the roll body of Example 3 was cleanly peeled off, so it was good. In addition, the secondary workability test was also performed on the roll bodies of Examples other than Example 3. As a result, the secondary workability was as good as the first filling portion of Example 3. The tensile strength of the first filling part constituent material in the roll bodies of the examples other than Example 3 is 3.0 MPa or more and 5.5 MPa or less, the elongation at break is 250% or more and 600% or less, and the tear strength is 6N/ mm or more and 25N/mm or less, the hardness of the first filling part constituent material measured by Durometer type A is 10° or more and 50° or less, and the linear shrinkage rate of the first filling part constituent material is 0% or more and 1.0% or less Within the range. In addition, as shown in Table 1, the edge thickness T1 of the first filling portion of the roll bodies of Examples 1 to 16 is in the range of 1.5 μm or more and 20 μm or less. When peeling off the first filling part or cleaning or wiping off, although it is only slightly, the edge thickness T1 is thick, and it is easier to peel or remove the first filling part.

In Examples 1-12, although the silicone resin composition or silicone rubber composition was coated to contact the first end surface and the second end surface of the double-sided tape, in Examples 1-12, the polysiloxane resin composition or the silicone rubber composition was applied to contact the first end surface and the second end surface of the double-sided tape. When the separation distance between the silicone resin composition or silicone rubber composition and the double-sided tape is 1 mm, after coating the silicone resin composition or silicone rubber composition or the double-sided tape configuration, As a result, a roll body can be produced stably, and the obtained roll bodies are also approximately the same as the above-mentioned evaluation results or measurement results of the roll bodies of Examples 1 to 12, respectively. Also, in the same way in Examples 1-12, the silicone resin composition or polysilicone rubber composition was used so that the separation distance between the silicone resin composition or the silicone rubber composition and the double-sided tape was 3 mm. After the application of the oxy rubber composition or the arrangement of the double-sided tape, the roll body can be stably manufactured, and the obtained roll bodies are also approximately the same as the above-mentioned evaluation results or measurement results of the roll bodies of Examples 1 to 12, respectively. In these cases, the procedure is as follows: first, the silicone resin composition is coated in a linear shape along the width direction of the core, and then the second end surface of the double-sided tape is combined with the silicone resin composition. Equipped with a double-sided tape with a separation distance of 1mm or 3mm, and a silicone resin composition with a separation distance of 1mm or 3mm between the first end face of the double-sided tape and the silicone resin composition, etc. The objects are coated in a linear shape along the width direction of the core.

In addition, in Example 2, the separation distance between the silicone rubber and the double-sided belt was 5mm, after coating the silicone rubber composition or the arrangement of the double-sided belt, the roller body could be manufactured stably. In addition, the obtained roll bodies were also approximately the same as the above-mentioned evaluation results or measurement results of the roll bodies of Example 2, respectively. In addition, the edge thickness T1 is 2 μm. In this case, the procedure is as follows: first, the silicone rubber composition is coated in a linear shape along the width direction of the core, and then the second end surface of the double-sided tape is separated from the silicone rubber composition The distance is 5mm, the double-sided tape is arranged, and the separation distance between the first end surface of the double-sided tape and the silicone rubber composition is 5mm, and the silicone rubber composition is placed along the width of the core The direction is coated into a line.

In Example 3, although a silicone rubber composition with a shear viscosity of 40 Pa·s during coating is used, for example, the shear viscosity during coating is 7 Pa·s, and the double-sided tape is combined with silicone rubber. After the separation distance between the components was 11 mm, the silicone rubber composition located on the first end surface side of the double-sided tape flowed to the opposite side of the double-sided tape side. Also, similarly, after setting the shear viscosity to 250 Pa·s and placing the silicone rubber composition in contact with the first end surface and the second end surface of the double-sided tape, even if the acrylic resin film is wound, it is difficult to use It flows sufficiently, so after hardening, although it is only slightly, there are other steps at the end of the winding start.

This case enjoys the priority of Special Application 2019-127551 (application date: July 9, 2019) and Special Application 2020-7594 (application date: January 21, 2020) of Japan’s earlier application. Quoted as part of this specification.

10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150: roll body 11: Roll core 11A: Outer peripheral surface 11B: Hole 12: piece 12A: End of winding start 12A1: Front face 12A2: Upper surface 12B: End of winding 12C: The back of the piece 12D: Zone 1 12E: Zone 2 12F: Zone 3 12G: End 12G1: end 1 12G2: end 2 12H: Convex 12I: Surface 13: The first gap 14: The first filling part 14A: The front end of the first filling part 14B: Surface of the first filling part 15, 52: the second gap 16, 53: 2nd filling part 17, 51: fixed components 17A, 51A: 1st end face 17B, 51B: 2nd end face 21, 54: 3rd gap 22, 55: The third filling part 71: The first intermediate part 71A: End 71B: Part 1 71C: Part 2 72: The second middle part 72A: 1st front end 72B: 2nd front end 72C: Surface 73: Intermediate roller body 73A: Outer peripheral surface 81: The third intermediate part 201～207: Coating material 210, 241: Mould 210A: slit 220, 230: layered body 221: Substrate 221A: Counterpoint 222, 242: Filling tape 231: The first substrate 232: thickness adjustment member 233: The second base material 234, 252: Filling tape 241A: Opening 251: Intermediate transfer body A1: The center of the sample A2, A3, A4, A5: points equidistant from the center A1 B1: 1st position B2: 2nd position C1: Midpoint between the 1st position and the 1st end C2: Midpoint between the 1st position and the 2nd position C3: Midpoint between the 2nd position and the 2nd end D1: The average distance from the virtual line to the position displacement curve in the direction of the vertical axis D2: The distance from the outer peripheral surface of the winding core to the upper surface of the winding start end DR1: The width direction of the core DR2: The direction of the long side of the film DR3: Radial of the core d: Width between measuring points E2: Intersection point of displacement 0mm line and position displacement curve E3: Intersection point of virtual line and displacement 0mm line IL1, IL2, IL3, IL4: virtual lines L1, L2, L3, L4: length MP: measuring point P1, P3: separation position P2, P4: Arrival position R1, R2, R3: area SA: sample S1, S2: area S3: cross-sectional area T1, T4: Edge thickness T2: thickness T3: Thickness of the fourth intermediate part T5: Thickness of Part 2 T6: The maximum thickness of the second intermediate part t: thickness W1: the width of the core W2: width of the film W3: The width of the fixed component

[Fig. 1] A perspective view of the roller body of the first embodiment. [Figure 2] A plan view of a sample for specifying the position of the phase difference in the measurement plane. [Fig. 3] An enlarged view of a part of the roller body of Fig. 1. [Fig. [Fig. 4] A diagram for explaining the dimensions of each component of the roller body in Fig. 1. [Fig. 5] An enlarged view of the vicinity of the front end of the first filling portion of the roller body of Fig. 1. [Fig. [Fig. 6] A diagram showing the area R1 and the area R2 in the roller body of Fig. 1. [Fig. 7] An enlarged view of a part of another roller body of the first embodiment. [Fig. 8] An enlarged view of a part of another roller body of the first embodiment. [Figure 9] A plan view of the roller body used to specify the measurement position of the laser displacement meter. [Figure 10] An image diagram of displacement versus position created based on the measurement of a laser displacement meter. [Fig. 11] In order to obtain the areas S1 and S2, a part of the image diagram of Fig. 10 is enlarged. [Fig. 12] An enlarged view of a part of another roller body of the first embodiment. [Fig. 13] An enlarged view of a part of another roller body of the first embodiment. [Fig. 14] An enlarged view of a part of another roller body of the first embodiment. [Fig. 15] An enlarged view of a part of another roller body of the first embodiment. [Fig. 16] An enlarged view of a part of another roller body of the first embodiment. [Fig. 17(A) and Fig. 17(B)] A diagram schematically showing the manufacturing process of the roll body of the first embodiment. [Fig. 18(A) and Fig. 18(B)] A diagram schematically showing the manufacturing process of the roll body of the first embodiment. [FIG. 19(A)-FIG. 19(C)] The figure which shows typically the manufacturing process of the other roll body of 1st Embodiment. [Fig. 20(A) and Fig. 20(B)] A diagram schematically showing other manufacturing steps of the roll body of the first embodiment. [Fig. 21(A) and Fig. 21(B)] A diagram schematically showing other manufacturing steps of the roll body of the first embodiment. [Fig. 22(A) to Fig. 22(D)] A diagram schematically showing other manufacturing steps of the roll body of the first embodiment. [Fig. 23(A) to Fig. 23(C)] A diagram schematically showing other manufacturing steps of the roll body of the first embodiment. [Fig. 24(A) and Fig. 24(B)] A diagram schematically showing other manufacturing steps of the roll body of the first embodiment. [Fig. 25] A perspective view of the roller body of the second embodiment. [Fig. 26] An enlarged view of a part of the roller body of Fig. 25. [Fig. [Fig. 27] A diagram for explaining the dimensions of each component of the roller body in Fig. 25. [Fig. [Fig. 28] A graph when the maximum thickness and length of the second intermediate portion shown in Fig. 25 are measured. [Fig. 29] A diagram showing a cross-sectional area S3. [Fig. 30] An enlarged view of a part of another roller body of the second embodiment. [Fig. 31] An enlarged view of a part of another roller body of the second embodiment. [Fig. 32] An enlarged view of a part of another roller body of the second embodiment. [Fig. 33] An enlarged view of a part of another roller body of the second embodiment. [Fig. 34] An enlarged view of a part of another roller body of the second embodiment. [Fig. 35] An enlarged view of a part of another roller body of the second embodiment. [Fig. 36] An enlarged view of a part of another roller body of the second embodiment. [Fig. 37] An enlarged view of a part of another roller body of the second embodiment. [Fig. 38(A)-Fig. 38(C)] A diagram schematically showing the manufacturing process of the roll body of the second embodiment. [Fig. 39(A) and Fig. 39(B)] A diagram schematically showing the manufacturing process of the roll body of the second embodiment. [FIG. 40] FIG. 40(A) is a graph showing the displacement of the roller body of Example 7 with respect to the position around the first filling portion, and FIG. 40(B) is a graph showing the roller body of Example 8 relative to the first filling portion. 1 A graph showing the displacement of the position around the filling part. Fig. 40(C) is a graph showing the displacement of the roller body of Example 9 with respect to the position around the first filling part.

Claims (36)

A method for manufacturing a roll body, the roll body is provided with a core and an elongated sheet wound on the outer peripheral surface of the core, and the manufacturing method has the following steps: Along the width direction of the core, coating material is applied to the outer peripheral surface of the core, Arranging the winding start end of the sheet in the longitudinal direction on the outer peripheral surface, and Winding the sheet around the core, and filling the coating material at least in the first gap; The coating of the coating material or the arrangement of the winding start end is carried out in such a way that the coating material contacts or approaches the front end surface of the winding start end in the longitudinal direction, The first gap is a gap located between the winding core and the sheet of the first turn and in contact with the front end surface. A method for manufacturing a roll body, the roll body is provided with a core and an elongated sheet wound on the outer peripheral surface of the core, and the manufacturing method has the following steps: Arrange the winding start end of the sheet in the longitudinal direction on the outer peripheral surface, The sheet is wound around the core for at least one turn to obtain an intermediate roller body with a first gap, Applying a coating material to the surface of the sheet constituting the outer peripheral surface of the intermediate roll body along the width direction of the core, and After coating the coating material, the sheet is wound around the core again so that the coating material is interposed between the sheets; The first gap is a gap located between the winding core and the sheet of the first turn and in contact with the front end surface of the winding start end in the longitudinal direction, The coating material is applied to the first area corresponding to the first gap on the surface of the sheet constituting the outer peripheral surface of the intermediate roller body. A method for manufacturing a roll body, the roll body is provided with a core and an elongated sheet wound on the outer peripheral surface of the core, and the manufacturing method has the following steps: A fixing member for fixing a part of the sheet to the core is arranged on the outer peripheral surface of the core along the width direction of the core, and the fixing member has a first extending in the width direction of the core The end surface and the second end surface on the opposite side of the first end surface, Coating the coating material on the outer peripheral surface of the core along the width direction of the core, Fixing a part of the sheet to the winding core through the fixing member, and After coating the coating material and fixing a part of the sheet to the core, the sheet is wound around the core, and the coating material is filled in at least any one of the second gap and the third gap; The coating of the coating material or the arrangement of the fixing member is performed in such a way that the coating material is located on the first end surface or the second end surface side, and the coating material is in contact with or close to the first end surface or the second end surface , Or in such a way that the coating material is located on the first end surface side and the second end surface side, and the coating material is in contact with or close to the first end surface and the second end surface, The second gap is a gap located between the winding core and the sheet of the first circle and in contact with the first end surface, The third gap is a gap located between the winding core and the sheet of the first turn and in contact with the second end surface. A method for manufacturing a roll body, the roll body is provided with a core and a long sheet wound on the outer peripheral surface of the core, and the manufacturing method has the following steps: A fixing member for fixing a part of the sheet to the core is arranged on the outer peripheral surface of the core along the width direction of the core, and the fixing member has a first extending in the width direction of the core The end surface and the second end surface on the opposite side of the first end surface, Through the fixing member, a part of the sheet is fixed to the winding core, The sheet is wound around the core for at least one turn to obtain an intermediate roller body having a second gap and a third gap, Applying a coating material to the surface of the sheet constituting the outer peripheral surface of the intermediate roll body along the width direction of the core, and After coating the coating material, the sheet is wound around the core again; The second gap is a gap located between the winding core and the sheet of the first ring and in contact with the first end surface of the fixing member, The third gap is a gap located between the winding core and the sheet of the first ring and in contact with the second end surface of the fixing member, The coating material is applied to at least any one of a second area corresponding to the second gap and a third area corresponding to the third gap on the surface of the sheet constituting the outer peripheral surface of the intermediate roller body. The method for manufacturing a roll body according to any one of claims 1 to 4, wherein the coating material has fluidity. The method for manufacturing a roll body according to any one of claims 1 to 5, wherein the coating material is a curable polymer composition. The method for manufacturing a roll body according to any one of claims 1 to 6, wherein the coating material contains a coloring material or a luminescent material. The method for manufacturing a roll body according to any one of claims 1 to 7, wherein the sheet has a resin film. The method for manufacturing a roll body according to any one of claims 1 to 7, wherein the sheet contains acrylic resin, polyester resin, or cycloolefin polymer resin. The method for manufacturing a roll body of claim 8 or 9, wherein the thickness of the sheet is 15 μm or more and 300 μm or less. The method for manufacturing a roll body according to any one of claims 1 to 10, wherein the sheet is a laminate having a base material and one or more functional layers laminated on the base material. The method for manufacturing a roll body according to any one of claims 1 to 11, wherein the sheet is used for an optical film, a polarizing plate, or a display device. A roller body, which is provided with a core and an elongated sheet wound on the outer peripheral surface of the core, and is provided with The first gap: located between the winding core and the sheet of the first turn, and is in contact with the front end surface of the sheet in the longitudinal direction of the first turn of the winding start end in the longitudinal direction, and The first filling part: filling the first gap and extending in the width direction of the core. Such as the roller body of claim 13, which further has Fixing member: set between the winding core and the sheet of the first turn, having a first end surface extending in the width direction of the winding core and a second end surface opposite to the first end surface, and fixing a part of the sheet to The core, The second gap: located between the winding core and the sheet of the first ring, and is in contact with the first end surface of the fixing member, The third gap: located between the winding core and the sheet of the first ring, and is in contact with the second end surface of the fixing member, and At least any one of the second filling part and the third filling part; The second filling part is filled in the second gap and extends in the width direction of the winding core, and the third filling part is filled in the third gap and extending in the width direction of the winding core. A roller body having a core and a long sheet wound on the outer peripheral surface of the core, and having The first gap: located between the winding core and the sheet of the first turn, and is in contact with the front end surface of the sheet in the longitudinal direction of the first turn of the winding start end in the longitudinal direction, and The first intermediate part: the first area that corresponds to at least the first gap between the sheets after the first turn, and extends in the width direction of the core. A roller body having a core and a long sheet wound on the outer peripheral surface of the core, and having Fixing member: set between the winding core and the sheet of the first turn, having a first end surface extending in the width direction of the winding core and a second end surface opposite to the first end surface, and fixing a part of the sheet to The core, The second gap: located between the winding core and the sheet of the first ring, and is in contact with the first end surface of the fixing member, The third gap: located between the winding core and the sheet of the first ring, and is in contact with the second end surface of the fixing member, and At least any one of the second filling part and the third filling part; The second filling part fills the second gap and extends in the width direction of the winding core, The third filling part fills the third gap and extends in the width direction of the winding core. A roller body having a core and a long sheet wound on the outer peripheral surface of the core, and having Fixing member: set between the winding core and the sheet of the first turn, having a first end surface extending in the width direction of the winding core and a second end surface opposite to the first end surface, and fixing a part of the sheet to The core, The second gap: located between the winding core and the sheet of the first ring, and is in contact with the first end surface of the fixing member, The third gap: located between the winding core and the sheet of the first ring, and is in contact with the second end surface of the fixing member, and At least one of the second intermediary part and the third intermediary part; The second intermediate portion is provided in a second area corresponding to the second gap between the sheets after the first turn, and extends in the width direction of the core, The third intermediate portion is provided in a third region corresponding to the third gap between the sheets after the first turn, and extends in the width direction of the core. For example, the roller body of claim 13 or 14, further provided with a fourth intermediate portion connected to the first filling portion and between the sheet in the first circle and the sheet in the second circle . Such as the roller body of claim 13 or 14, wherein, when there is no situation where there is no fourth intermediate part connected to the first filling part and between the sheet in the first circle and the sheet in the second circle, The ratio of the length L1 of the first filling portion along the longitudinal direction of the sheet to the thickness T2 of the first filling portion in contact with the front end surface is 90 or more, and when there is the fourth intermediate In the case of part, the total of the length L1 along the longitudinal direction of the sheet in the first filling part and the length L2 along the longitudinal direction of the sheet in the fourth intermediate part is relative to the first filling part The ratio of the thickness T2 of the portion in contact with the front end surface is 90 or more. Such as the roller body of claim 19, wherein, when the fourth intermediate portion does not exist, the ratio of the area S1 to the thickness T2 of the first filling portion is 3.0 or more, and the area S1 is the area including the sheet The area of the area sandwiched between the outer peripheral surface of the winding core and the surface of the first filling part in the longitudinal direction and the radial plane of the winding core, and when the fourth intermediate part exists, the area S1 The ratio of the total and area S2 to the thickness T2 of the first filling portion is at least 3.0, and the area S1 is the outer circumference of the core in the plane including the longitudinal direction of the sheet and the radial direction of the core The area of the area sandwiched between the surface and the surface of the first filling portion, and the area S2 is the area of the area sandwiched between the outer peripheral surface of the winding core and the surface of the fourth intermediate portion. The roller body of claim 17, wherein when the thickness of the second intermediate portion is measured along the longitudinal direction of the sheet, from the first front end of the second intermediate portion on the fixing member side in the longitudinal direction The ratio of the length L4 from the second front end on the opposite side to the position of the maximum thickness T6 of the second intermediate portion to the maximum thickness T6 of the second intermediate portion is 12 or more. The roller body of claim 21, wherein, in a plane including the longitudinal direction of the sheet and the radial direction of the core, from the second front end of the second intermediate portion to the position of the maximum thickness T6 The ratio of the cross-sectional area S3 of the second intermediate portion to the maximum thickness T6 of the second intermediate portion is 2.5 or more. The roller body of claim 15 or 17, wherein the sheet has convex portions protruding in the radial direction of the winding core at both end portions extending along the longitudinal direction of the sheet. The roller body according to any one of claims 13 to 23, wherein the sheet has a resin film. The roller body according to any one of claims 13 to 23, wherein the sheet contains acrylic resin, polyester resin, and cycloolefin polymer resin. The roller body of claim 24 or 25, wherein the thickness of the sheet is 15 μm or more and 300 μm or less. The roller body of claim 13, wherein the first filling part contains a coloring material or a luminescent material. The roller body of claim 14 or 16, wherein the second filling part and the third filling part respectively contain a coloring material or a luminescent material. The roller body of claim 15, wherein the first intermediate portion contains a coloring material or a luminescent material. The roller body of claim 17, wherein the second intermediate portion and the third intermediate portion respectively contain a coloring material or a luminescent material. The roller body of claim 13, wherein the first filling part contains a cured product of a curable polymer composition. The roller body of claim 14 or 16, wherein the second filling part and the third filling part each contain a cured product of a curable polymer composition. The roller body of claim 15, wherein the first intermediate portion contains a cured product of a curable polymer composition. The roller body of claim 17, wherein the second intermediate portion and the third intermediate portion each contain a cured product of a curable polymer composition. The roll body according to any one of claims 13 to 34, wherein the sheet is a laminate having a base material and one or more functional layers laminated on the base material. The roller body according to any one of claims 13 to 35, wherein the sheet is used for an optical film, a polarizing plate, or a display device.

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