WO2018216590A1 - フィルムロール及びその製造方法 - Google Patents

フィルムロール及びその製造方法 Download PDF

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Publication number
WO2018216590A1
WO2018216590A1 PCT/JP2018/019069 JP2018019069W WO2018216590A1 WO 2018216590 A1 WO2018216590 A1 WO 2018216590A1 JP 2018019069 W JP2018019069 W JP 2018019069W WO 2018216590 A1 WO2018216590 A1 WO 2018216590A1
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WO
WIPO (PCT)
Prior art keywords
film
winding
region
resin film
roll
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Application number
PCT/JP2018/019069
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English (en)
French (fr)
Japanese (ja)
Inventor
和哉 須田
Original Assignee
日本ゼオン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本ゼオン株式会社 filed Critical 日本ゼオン株式会社
Priority to KR1020197033694A priority Critical patent/KR102366213B1/ko
Priority to CN201880025667.3A priority patent/CN110520272B/zh
Priority to JP2019520204A priority patent/JP7020483B2/ja
Publication of WO2018216590A1 publication Critical patent/WO2018216590A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/28—Wound package of webs

Definitions

  • the present invention relates to a film roll and a manufacturing method thereof.
  • Patent Document 1 a rack for loading a roll product including a rod-shaped cylindrical member and a sheet-like article wound around the rod-shaped cylindrical member is disclosed.
  • the optical film when the sheet-like article wound around the rod-shaped cylindrical member is an optical film, the optical film is usually a thin film and easily damaged. When the optical film is scratched, the optical properties of the optical film are impaired. However, when a roll product such as an optical film is loaded on a conventional rack and conveyed to a destination, the optical film may be scratched due to vibration or the like that occurs during conveyance. In particular, the scratches are likely to occur at the position in the upper part of the gravity direction at the center of the film roll in the axial direction.
  • the present invention has been made in view of the above-described problems, and an object thereof is to provide a film roll capable of suppressing both the generation of scratches and the generation of gauge bands, and a method for manufacturing the same.
  • the winding direction in which the average height of the first region including the start end portion in the winding direction and the convex portion of the concavo-convex structure portion is larger than the first region by 1 ⁇ m or more.
  • the diameter of the winding core, the winding diameter of the first region, and the diameter of the film roll satisfy a predetermined condition. It was found that the film roll produced in the above can suppress both the generation of scratches and the generation of gauge bands. That is, the present invention is as follows.
  • a film roll comprising a winding core and a long resin film wound around the winding core,
  • the resin film includes a concavo-convex structure portion at an end in the width direction,
  • the resin film has a first region including a start end in a winding direction, and a second region adjacent to the first region and including a terminal end in the winding direction,
  • the resin film satisfies the formula (A)
  • the film roll satisfies the formulas (B) to (C)
  • H1 is the average value of the height of the convex part of the concavo-convex structure part of the resin film in the first region
  • H2 is an average value of the heights of the convex portions of the concavo-convex structure portion of the resin film in the second region
  • the resin film has an uneven structure region in the second region, The concavo-convex structure region is defined in an end region within 20 mm from an edge in the width direction of the resin film, The resin film has the concavo-convex structure portion having an average height of 3 ⁇ m to 25 ⁇ m in the concavo-convex structure region.
  • the resin film has a flat portion having an average roughness SRa of 5 nm to 25 nm in an area inside 20 mm from the edge in the width direction on at least one surface, [1] or [2] The film roll as described in.
  • [4] The film roll according to any one of [1] to [3], wherein the average thickness is 10 ⁇ m to 100 ⁇ m.
  • [5] A method for producing a film roll according to any one of [1] to [4], A method for producing a film roll, comprising a step of winding the resin film around the core with a winding tension of 50 N / m to 300 N / m.
  • the present invention it is possible to provide a film roll that can suppress both the generation of scratches and the generation of gauge bands, and a method for manufacturing the film roll.
  • FIG. 1 is a perspective view showing a film roll according to an embodiment of the present invention.
  • FIG. 2 is a side view schematically showing a film roll according to an embodiment of the present invention.
  • FIG. 3 is a plan view schematically showing a state in which the resin film of the film roll according to one embodiment of the present invention is developed on a plane.
  • 4 is a cross-sectional view taken along line YY in FIG.
  • FIG. 5 is a schematic view schematically showing a winding device used in the method for producing a film roll according to one embodiment of the present invention.
  • FIG. 6 is a schematic view schematically showing a winding device used in the method for manufacturing a film roll according to one embodiment of the present invention.
  • FIG. 1 is a perspective view showing a film roll according to an embodiment of the present invention.
  • FIG. 2 is a side view schematically showing a film roll according to an embodiment of the present invention.
  • FIG. 3 is a plan view schematically showing a state in which the resin film of
  • FIG. 7 is a plan view schematically showing a planar shape of the concavo-convex structure portion formed in the film roll according to the first embodiment.
  • FIG. 8 is a front view showing the configuration of the rack used in the film roll evaluation test of the example.
  • FIG. 9 is a side view of the rack of FIG.
  • the “long” film means a film having a length of 5 times or more, preferably 10 times or more, and specifically a roll.
  • the upper limit of the length of the long film is not particularly limited, and can be, for example, 100,000 times or less with respect to the width.
  • FIG. 1 is a perspective view schematically showing a state in which a resin film 100 on the terminal end side in the winding direction is partially unwound from the film roll 10 of the present embodiment.
  • the film roll 10 of this embodiment includes a cylindrical winding core 11 and a long resin film 100 wound around the winding core 11.
  • FIG. 2 is a side view schematically showing the film roll 10 of the present embodiment.
  • the film roll 10 has a cylindrical shape centered on a point 11C, and includes a cylindrical winding core 11 and film portions 12A and 12B around which a resin film is wound.
  • 12 ⁇ / b> A is a first film portion in which a first region 100 ⁇ / b> A including a starting end portion in the winding direction of the film 100 is wound
  • 12 ⁇ / b> B is a first film portion including a terminal portion in the winding direction of the film 100.
  • This is a second film portion in which the second region 100B is wound.
  • FIG. 1 is a side view schematically showing the film roll 10 of the present embodiment.
  • the film roll 10 has a cylindrical shape centered on a point 11C, and includes a cylindrical winding core 11 and film portions 12A and 12B around which a resin film is wound.
  • 12 ⁇ / b> A is a first film portion in which a first region 100
  • 12P is an end portion of the first film portion 12A (first region 100A), and is connected to the second film portion 12B (second region 100B) at the end portion 12P.
  • R 1 is the diameter of the winding core 11
  • R 2 is the winding diameter of the first region 100 A wound around the winding core 11
  • R 3 is the diameter of the film roll 10.
  • FIG. 3 is a plan view schematically showing a state in which the resin film 100 used in the film roll 10 of this embodiment is viewed from the upper surface 100U side.
  • the left-right direction in FIG. 3 is the winding direction, the left side is the start end side in the winding direction, and the right side is the end side in the winding direction.
  • the resin film 100 includes a first region 100A including a start end in the winding direction, and a second region 100B adjacent to the first region 100A and including a terminal end in the winding direction. Have.
  • the end portion 12P of the first region 100A is also an end portion on the start end side in the winding direction of the second region 100B.
  • the first region 100A is a region from the start end portion to the end portion 12P in the winding direction of the film 100
  • the second region 100B is a region from the end portion 12P to the end portion in the winding direction.
  • a resin film 100 drawn from the film roll 10 shown in FIG. 1 is a second region 100B including a terminal portion in the winding direction.
  • the resin film 100 includes an uneven structure portion 120.
  • the concavo-convex structure portion 120 is not provided in the first region 100A, but the concavo-convex structure portion 120 having the same shape is formed in both ends in the width direction (the vertical direction in the drawing) in the second region 100B. Is provided.
  • the regions where the uneven structure portion 120 is provided are referred to as uneven structure regions 120R and 120L (see FIG. 1).
  • a region where the uneven structure between the two uneven structure regions 120R and 120L is not provided is the flat portion 110.
  • the flat part 110 is provided in the area
  • the average roughness SRa of the flat portion 110 is preferably 5 nm or more, more preferably 7 nm or more, further preferably 9 nm or more, preferably 25 nm or less, more preferably 20 nm or less, and even more preferably 10 nm or less. It is.
  • the average roughness SRa of the flat portion 110 is preferably 5 nm or more, more preferably 7 nm or more, further preferably 9 nm or more, preferably 25 nm or less, more preferably 20 nm or less, and even more preferably 10 nm or less. It is.
  • the average roughness SRa of the flat portion 110 is preferably 5 nm or more, more preferably 7 nm or more, further preferably 9 nm or more, preferably 25 nm or less, more preferably 20 nm or less, and even more preferably 10 nm or less. It is.
  • the surface roughness SRa of the flat portion 110 of the film 100 is measured using a commercially available surface roughness measuring instrument, for example, a surface roughness measuring instrument “Surfcoder ET4000AK” manufactured by Kosaka Laboratory Ltd., with a stylus load of 50 ⁇ N. It can be measured under conditions of a length of 1 mm square and a cutoff of 0.8 mm.
  • the concavo-convex structure portion 120 present in the concavo-convex structure regions 120R and 120L is provided at a position separated from the edge in the width direction of the film 100 as shown in FIGS.
  • the width dimension A1 of the two concavo-convex structure regions 120R and 120L is substantially the same, and the width dimension A1 is a constant value from the start end (end portion 12P) to the end of the second region 100B. Is done.
  • the uneven structure portion 120 is preferably provided in an end region within 20 mm from the edge in the width direction of the film 100, and more preferably provided in an end region within 18 mm from the edge, More preferably, it is provided in an end region within 15 mm from the end edge.
  • the width A1 of the concavo-convex structure region in which the concavo-convex structure portion is formed is preferably 3 mm or more, more preferably 5 mm or more, and even more preferably 7 mm or more.
  • the concavo-convex structure portion 120 uses a shape unit in which four rhombuses are connected as one unit, and this is repeated in the film length direction (winding direction). Shape.
  • the concavo-convex structure portion 120 is preferably one in which a predetermined shape unit is repeated from the viewpoint of easy adjustment of the ratio of the concavo-convex structure area.
  • FIG. 4 is a diagram schematically showing a cross section (YY cross section in FIG. 3) obtained by cutting the concavo-convex structure portion 120 of the second region 100B along a plane perpendicular to the extending direction.
  • the concavo-convex structure portion 120 includes a concave portion 121 and a convex portion 122.
  • the concave portion 122 corresponds to a portion where the resin is removed by thermal melting or ablation by laser light irradiation, and the convex portion 121 is heated by the laser light irradiation and the fluidized resin is raised. It corresponds to the part. Since the convex portion 121 protrudes from the surface 100U of the surrounding film 100, the substantial thickness of the film 100 is increased in the concave-convex structure portion 120.
  • the height H of the convex portion 121 of the concavo-convex structure portion 120 refers to the height from the upper surface 100U of the film 100 where the concavo-convex structure is not provided to the top portion 121T of the convex portion.
  • the height of the convex part of the concavo-convex structure part 120 may be uniform or non-uniform.
  • the height of the convex portion in the concavo-convex structure portion 120 in the second region can be measured using, for example, a three-dimensional surface profiler (“New View 5000” manufactured by Zygo Corporation).
  • the average value H2 of the height H of the convex part 121 of the concavo-convex structure part 120 in the second region 100B of the film 100 is a value within a specific range.
  • H2 is relatively defined with respect to the average value H1 of the height H of the convex portion of the concave-convex structure portion in the first region 100A of the film 100.
  • H1 and H2 satisfy the following formula (A).
  • the average value H1 of the height H of the protruded portion of the uneven structure portion in the first region 100A is zero.
  • the second region 100B is more than the first region 100A.
  • This is a region where the average value of the heights H of the convex portions 121 of the concavo-convex structure portion 120 is 1 ⁇ m or more.
  • “the average value of the heights of the convex portions” may be referred to as “the average height of the convex portions”.
  • the value of H2-H1 is preferably 3 ⁇ m or more, more preferably 5 ⁇ m or more.
  • the upper limit of the value of H2-H1 is not particularly limited, but may be, for example, 25 ⁇ m or less.
  • the average value H2 of the height H of the convex portion 121 of the concavo-convex structure portion 120 in the second region 100B is 1 ⁇ m or more, preferably 3 ⁇ m or more, more preferably 5 ⁇ m or more, and even more preferably 7 ⁇ m or more. On the other hand, it is preferably 25 ⁇ m or less, more preferably 20 ⁇ m or less, and still more preferably 15 ⁇ m or less.
  • the average value H2 of the height H is equal to or less than the above upper limit value, the deformation of the film due to the difference in the winding diameter between the portion where the concavo-convex structure portion is formed and the other portion in the wound roll is suppressed. can do.
  • the width of the concavo-convex structure portion 120 is preferably 0.1 ⁇ m or more, more preferably 0.15 ⁇ m or more, particularly preferably 0.2 ⁇ m or more, preferably 1 ⁇ m or less, more preferably 0.75 ⁇ m or less, Particularly preferably, it is 0.5 ⁇ m or less.
  • the width of the concavo-convex structure portion 120 is not less than the lower limit of the above range, winding deviation can be suppressed when the film 100 is wound.
  • variety of the uneven structure part 120 is below the upper limit of the said range, the uneven structure part 120 can be formed, without a shape collapsing.
  • the average thickness of the film 100 is preferably 10 ⁇ m or more, more preferably 20 ⁇ m or more, further preferably 30 ⁇ m or more, preferably 100 ⁇ m or less, more preferably 80 ⁇ m or less, and even more preferably 60 ⁇ m or less. Even a thin film having an average thickness of not more than the upper limit can effectively suppress the generation of scratches, and the effects of the present invention can be obtained.
  • the thickness of the film can be measured using a commercially available measuring instrument such as “F20-NIR” manufactured by Filmmetrics.
  • the material of the resin film which comprises the film roll of this embodiment is not specifically limited, Various thermoplastic resins can be employ
  • the resin film may be a single layer film or a multilayer film having a plurality of layers.
  • the resin film may be a stretched film or an unstretched film.
  • the film roll of this embodiment can be manufactured by a manufacturing method including a preparation step of preparing a resin film and a step of winding the prepared resin film around a winding core (winding step).
  • the method for imparting the concavo-convex structure portion to the film before imparting the concavo-convex structure portion is not particularly limited, and a known method for forming the concavo-convex structure can be adopted. Examples of such a method include an uneven structure imparting method using a laser and an uneven structure imparting method using an embossing roll.
  • a specific pattern is drawn by a laser on the surface in the concavo-convex structure region of a continuously conveyed film.
  • the surface of the film can be partially heated by a laser, and the surface of the film can be deformed by the heating, and as a result, an uneven structure portion having a specific pattern can be formed.
  • an emboss roll having an uneven structure of a specific pattern is prepared on the peripheral surface, and the uneven structure of the emboss roll is formed on the surface in the uneven structure region of the film that is continuously conveyed. Can be transferred, whereby a concavo-convex structure having a specific pattern can be formed.
  • the concavo-convex structure is applied only to a region corresponding to the second region 100B of the resin film 100.
  • the step of winding the resin film around the core includes a first winding step for winding the first region of the resin film and a second winding step for winding the second region of the resin film.
  • the touch roll in the first winding step, the touch roll is pressed against the film roll in the middle of manufacture and wound up, and in the second winding step, the touch roll is separated from the film roll in the middle of manufacture. Take up the gap.
  • the first winding step it is preferable to perform touch winding from the viewpoint of more effectively preventing the generation of scratches.
  • the first region that does not include the concavo-convex structure portion can be more effectively prevented from being scratched by winding it by touch winding.
  • FIG. 5 is a diagram schematically showing a winding device 200 used in the first winding step.
  • the winding device 200 winds up the first region 100A of the long film 100 and winds the first region 100A around the winding core 11 (a film roll having the first film portion 12A).
  • the film 100 is continuously conveyed in the longitudinal direction of the long film 100 and supplied to the touch roll 220.
  • the conveyance speed of the film 100 is usually equal to the winding speed when the film 100 is wound around the winding core 11. Therefore, it is preferable to set the conveyance speed of the film 100 so that a desired winding speed can be achieved.
  • the film 100 supplied to the touch roll 220 is wound around the touch roll 220.
  • the touch roll 220 since the touch roll 220 is provided to be freely rotatable, the touch roll 220 rotates in the circumferential direction by a frictional force applied from the wound long film 100.
  • the long film 100 is guided to the winding core 11 by the touch roll 220 rotating in this way.
  • the touch roll 220 may be provided with a driving force for rotating the touch roll 130.
  • the winding core 11 is rotated in the circumferential direction by the driving force applied from the winding core motor 210. Therefore, the film 100 guided to the core 11 while being wound around the touch roll 220 is wound around the core 11. And the film roll which has 12 A of 1st film parts is formed with the film 100 wound up by the winding core 11.
  • the touch roll 220 presses the film roll being manufactured with a predetermined load in the radial direction of the winding core 11 by an urging force applied from an air cylinder (not shown).
  • an air cylinder not shown
  • the film 100 wound around the core 11 that is, the film included in the film roll being manufactured
  • the center of the core 11 with a predetermined load.
  • the magnitude of the load with which the touch roll 220 pushes the film roll during production is usually 20 N / m or more, preferably 50 N / m or more, more preferably 100 N / m or more, and usually 500 N / m or less, preferably 400 N / m. m or less, more preferably 300 N / m or less.
  • size of the load which the touch roll 220 presses the film roll in the middle of manufacture may change a value arbitrarily according to the winding diameter of the film roll in the middle of manufacture in the said range.
  • the winding tension of the film 100 when the film 100 is wound around the core 11 is preferably 50 N / m or more, more preferably 70 N / m or more, and even more preferably 90 N / m or more. , Preferably 300 N / m or less, more preferably 250 N / m or less, still more preferably 200 N / m or less.
  • the unit “N / m” of the winding tension represents the magnitude of the force applied per 1 m of the film width.
  • the winding tension of the film 100 may be arbitrarily changed within the above range according to the winding diameter of the film roll 10 being manufactured.
  • the winding tension may be changed so as to gradually decrease, may be changed so as to increase gradually, or a combination thereof.
  • FIG. 6 is a diagram schematically showing a winding device 300 used in the second winding step.
  • the winding apparatus 300 winds up the second region 100B of the long film 100, and the film roll 10 in which the second region 100B is further wound around the wound body in which the first region 100A is wound. It is the winding device for obtaining.
  • the winding device 300 includes a winding core 11, a winding core motor 310 as a rotation driving device for the winding core 11, a free roll 320, and an arm 330 as a position adjusting device for the free roll 320.
  • the free roll 320 is obtained by adjusting the position of the touch roll 220 of the winding apparatus 200 used in the first winding process by the arm 330 so as not to contact the winding core 11 and the film roll 10 being manufactured.
  • the film 100 is wound around the free roll 320 and then the film 100 is wound around the winding core 11 to obtain the film roll 10.
  • the film 100 wound around the free roll 320 is taken up by the winding core 11 after being separated from the free roll 320 to form the film roll 10.
  • the free roll 320 is used in place of the touch roll 220, air flows between the peripheral surface of the film roll being manufactured and the film 100.
  • the film portion 12B contains more air than the first film portion 12A.
  • the winding tension of the film 100 when the film 100 is wound around the winding core 11 is made smaller than that in the first winding step.
  • the winding tension of the film 100 is preferably 50 N / m or more, more preferably 70 N / m or more, still more preferably 90 N / m or more, preferably 300 N / m or less, more preferably 200 N / m or less, more preferably 150 N / m or less.
  • the unit “N / m” of the winding tension represents the magnitude of the force applied per 1 m of the film width.
  • the winding tension of the film 100 may be arbitrarily changed within the above range according to the winding diameter of the film roll 10 being manufactured. In this case, for example, the winding tension may be changed so as to gradually decrease, may be changed so as to increase gradually, or a combination thereof.
  • the resin film 100 satisfies the requirement of the formula (A) (requirement (A)).
  • a film roll satisfies the requirements (requirements (B) and (C)) of the following formulas (B) and (C).
  • R1 is the diameter of the winding core 11
  • R2 is the winding diameter of the first region 100A wound around the winding core
  • R3 is the thickness of the film roll 10. Is the diameter.
  • 100 ⁇ (R2-R1) / R3 is preferably 4 or more, more preferably 6 or more, still more preferably 8 or more, preferably 45 or less, more preferably 40 or less, and still more preferably 35 It is as follows.
  • 100 ⁇ (R2-R1) / R2 is preferably 3 or more, more preferably 5 or more, still more preferably 7 or more, preferably 60 or less, more preferably 40 or less.
  • the film 100 includes the first region 100A in which the uneven structure portion 120 is not provided on the start end side in the winding direction, so the first region 100A of the film 100 is wound.
  • the 1st film part 12A which was made there is no film floating and it winds hard and it is hard to produce friction.
  • a gauge band due to the film thickness is likely to occur on the outer side of the film roll (the portion with a large winding diameter). There's a problem.
  • the second region 100B having an average height of the convex portion of the concavo-convex structure portion 120 larger than the first region 100A by 1 ⁇ m or more is wound outside the first film portion 12A.
  • the second film portion 12B is provided, and in the second film portion 12B, the resin film 100 is wound so as to contain more air than the first film portion 12A. That is, the film roll 10 of the present embodiment has the first film portion 12A that is less likely to cause friction at a portion close to the core 11 (portion having a small winding diameter) by providing the requirement (A), and the outside ( A portion having a large winding diameter) has a second film portion 12B that contains air and is not easily affected by the film thickness.
  • the resin film satisfies the requirement (A) and the film roll satisfies the requirements (B) and (C), both the generation of scratches and the generation of gauge bands are suppressed.
  • the film roll which can be manufactured, and its manufacturing method can be provided.
  • the film roll of this embodiment can handle handling such as storage, transportation, and transaction in the state of the film roll.
  • the film unwound from the film roll of the present invention can be used over a wide range, and among them, it is preferably used as an optical film.
  • Specific examples of the optical film include a retardation film, a polarizing plate protective film, and an optical compensation film.
  • FIG. 8 is a front view of a rack in which the film rolls manufactured in each example are loaded
  • FIG. 9 is a side view of the rack.
  • the rack 1 is made of steel, and as shown in FIGS. 8 and 9, the pallet 4 at the bottom, a pair of support frames 3 and 3 standing upward from the pallet 4, and the side surface of the rack 1. And connecting rods 5 and 5 for connecting the pair of support frames 3 and 3 at the top.
  • the film roll 10 manufactured in each example is loaded in an accommodation space surrounded by the upper surface of the pallet 4, the pair of support frames 3 and 3, and the connecting rods 5 and 5.
  • the pallet 4 has a hollow rectangular parallelepiped shape including the accommodation space, and functions as a base for receiving a load applied to the rack 1. 8 in FIG. 8 and FIG. 9 is a bottom plate of the pallet 4.
  • the rack 1 includes a cylindrical member receiving portion 2 that accommodates the end of the winding core 11 of the film roll 10, and an opening / closing member 7 that opens and closes the cylindrical member receiving portion 2.
  • the end portion of the winding core 11 is accommodated in the cylindrical member receiving portion 2, the end portion of the winding core 11 is pressed by the cylindrical member receiving portion 2 by closing the opening / closing member 7 and locking the locking fitting 7 ⁇ / b> A.
  • the movement is regulated by the member 9 and the rubber member 9A.
  • the rack 1 includes a backing plate portion 6, and the backing plate portion 6 stands vertically from a backing plate 6 ⁇ / b> A having a supporting surface that supports the side surface of the film roll 10 and a back surface opposite to the supporting surface of the backing plate 6 ⁇ / b> A.
  • a base plate 6B to be provided and a nut 6C to be screwed with a thread portion of a thread bolt (not shown) are provided.
  • the threaded bolt is passed through the bolt hole formed in the base plate 6B, and then the nut 6C is screwed to fix the contact plate 80 to the opening / closing member 34.
  • the backing plate 6 ⁇ / b> A functions as a member that sandwiches the side surface of the film roll 10.
  • the weight of the rack 1 alone on which the film roll 10 is not loaded is 100 kg.
  • Example 1 (1-1) Production of Resin Film Using a long optical film having an average thickness of 50 ⁇ m in which an easy-adhesion layer made of a urethane resin is provided on one surface of a film formed of a cycloolefin resin, the following method is used: Thus, an uneven structure portion was formed.
  • the portion corresponding to the second region of the optical film before the treatment was irradiated with laser light to form a concavo-convex structure portion shown in FIG.
  • the concavo-convex structure portion was formed in a region where the distance from the edge in the film width direction of the surface on the resin layer side of the optical film was 11.5 mm and separated from the edge by 1 mm to 2 mm.
  • the width dimension A1 of the uneven structure region is 9.5 mm to 10.5 mm.
  • a laser beam irradiation device a CO2 laser beam irradiation device (“LP-430U” manufactured by Panasonic Sunkus, laser wavelength 10.6 ⁇ m) was used.
  • the irradiation output of laser light was 90% output.
  • FIG. 7 is a plan view schematically showing the planar shape of the concavo-convex structure portion 120 formed in the first embodiment.
  • the coordinate of the longitudinal direction and the width direction of a resin film is shown.
  • the unit of the numerical value of this coordinate is millimeter.
  • the average height of the convex portions of the concavo-convex structure portion 120 was 10 ⁇ m.
  • each of the corner portions A surrounded by the alternate long and short dash line has an angle of 90 °.
  • the angle of the non-linear portion other than the corner portion A was 135 °.
  • the long resin film includes a first region where the concavo-convex structure portion is not provided and a second region where the concavo-convex structure portion 120 having the shape shown in FIG. 7 is provided at both ends in the width direction.
  • the average roughness SRa of the surface of the flat portion between the two concavo-convex structure regions in the second region is 10 ⁇ m.
  • the length of the first region is 300 m.
  • Example 5> (5-2) Manufacture of film roll Implemented except that a roll core with a diameter R1 of 350 mm was used, and that a resin film was wound around the roll core so that R2 was 375 mm and the diameter R3 of the film roll was 685 mm.
  • a film roll was produced in the same manner as in Example 1-2 (1-2), an evaluation test was performed, and the results are shown in Table 1.
  • Table 1 and Table 2 show the evaluation results of Examples and Comparative Examples.
  • the table shows R1, R2, R3, 100 ⁇ (R2-R1) / R3, 100 ⁇ (R2-R1) / R2, and the length of the first region in the resin film (in the table “ The length of the first region "), the average height of the convex portions of the concavo-convex structure portion of the first region (" average height of the convex portions of the first region "in the table), the second region The average value of the heights of the protrusions of the concavo-convex structure part (“average height of the protrusions of the second region” in the table), the surface roughness SRa of the flat part (“SRa of the flat part” in the table), first The winding tension in the winding process and the winding tension in the second winding process are also shown.
  • the present invention is not limited to the embodiment described above with reference to the drawings and may be, for example, the following embodiment.
  • the film 100 having the uneven structure regions 120R and 120L having substantially the same width dimension is shown.
  • films having different width dimensions of the two uneven structure regions may be used.
  • the film 100 in which the concavo-convex structure portion 120 is provided at a position separated from the edge in the width direction of the film 100 is shown, but the concavo-convex structure portion is in contact with the edge in the width direction of the film. It may be a film provided at the position.
  • the concavo-convex structure portion having the shape unit in which four rhombuses are connected as one unit is shown, but the shape of the concavo-convex structure portion is not limited to this.
  • the resin film having the first region in which the uneven structure portion is not formed (the height of the protruded portion is 0) is shown, but the first is provided with the uneven structure portion.
  • region may be sufficient.
  • the average value of the heights of the convex portions of the concavo-convex structure portion in the second region should be 1 ⁇ m or more larger than the average value of the heights of the convex portions of the concavo-convex structure portion in the first region.
  • touch winding is performed in the first winding process of winding the first region of the resin film
  • gap winding is performed in the second winding process of winding the second region of the resin film.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Winding Of Webs (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
PCT/JP2018/019069 2017-05-23 2018-05-17 フィルムロール及びその製造方法 WO2018216590A1 (ja)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0485248A (ja) * 1990-07-26 1992-03-18 Konica Corp ウエブの巻取装置
WO2015137367A1 (ja) * 2014-03-11 2015-09-17 コニカミノルタ株式会社 光学フィルムのロール体とその製造方法、偏光板および液晶表示装置
JP2016132537A (ja) * 2015-01-20 2016-07-25 日本ゼオン株式会社 フィルムロールの製造方法及びフィルムロール

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Publication number Priority date Publication date Assignee Title
JP2005335747A (ja) 2004-05-26 2005-12-08 Nippon Zeon Co Ltd ロール製品用ラック
WO2013140433A1 (ja) * 2012-03-19 2013-09-26 コニカミノルタ株式会社 光学フィルムのロール体、およびそれを用いた偏光板の製造方法
CN104870352B (zh) * 2012-12-13 2017-03-22 柯尼卡美能达株式会社 光学膜的卷体、其制造方法、偏振片及显示装置
JP2017047978A (ja) * 2015-08-31 2017-03-09 日本ゼオン株式会社 巻回体及びその製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0485248A (ja) * 1990-07-26 1992-03-18 Konica Corp ウエブの巻取装置
WO2015137367A1 (ja) * 2014-03-11 2015-09-17 コニカミノルタ株式会社 光学フィルムのロール体とその製造方法、偏光板および液晶表示装置
JP2016132537A (ja) * 2015-01-20 2016-07-25 日本ゼオン株式会社 フィルムロールの製造方法及びフィルムロール

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KR102366213B1 (ko) 2022-02-21
TWI750376B (zh) 2021-12-21
CN110520272B (zh) 2021-07-30
CN110520272A (zh) 2019-11-29

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