JP2008260601A - Rolled body, its manufacturing method, and laminating part-containing long sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolled body capable of reducing or preventing a step trace when a long sheet is rewound from a take-up core material and used, its manufacturing method, and a laminating part-containing long sheet. <P>SOLUTION: In this rolled body, a long sheet 1 is wound around a take-up core material 2, and a winding start end 3 of the long sheet is covered with an insertion cover 11 having an end with 2/3 or less thickness of the long sheet and made of a material with an impact resilience parameter of 3-2,000 g across its entire width. In this manufacturing method, when the long sheet is wound around the take-up core material, the winding start end of the long sheet is covered by the insertion cover across its entire width directly or via a winding layer of the long sheet, and thereafter, the long sheet is further wound from above the insertion cover. The laminating part-containing long sheet includes a part laminated on the insertion cover carried exfoliatably from the long sheet on the inner surface in a longitudinal direction from the winding start end of the long sheet. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wound body, a method for producing the same, and a laminated part-containing long sheet. ADVANTAGE OF THE INVENTION According to this invention, the level | step difference trace of the elongate sheet rewound from the winding core material can be reduced thru | or eliminated.

Long sheet-shaped original fabric (paper, plastic film, metal foil, etc.), adhesive tape or flooring, or wrap film or aluminum foil used at home is generally cylindrical or cylindrical, such as a paper tube. It is stored or transported in a state of being wound around the peripheral surface of the winding core material, and is actually used after being unwound from the winding core material before use and brought into a flat state.
In such a conventional wound body, as shown in FIG. 10, the winding start end portion 42 of the long sheet 41 is covered with the adhesive tape over the entire width of the winding core member 43 such as a paper tube. It is a general method to fix to. However, in this method, a step is generated between the winding start end portion 42 and the surface of the winding core member 43, so that the winding start end portion 42 and the back side surface of the long sheet 41 at the second week are formed. A gap 44 is generated between them. When the long sheet 41 is wound around the winding core material 43, a force for pressing the long sheet 41 toward the winding core material 43 is continuously applied, so that a recess 45 is formed in a region corresponding to the gap portion 44. Is done. The depth of the recess 45 decreases as the distance from the winding layer close to the winding core material decreases, but the wound body 40 is stored while containing the recess 45, so that the long sheet is used. When rewinding from the winding core material 43 before using 41, as shown in FIG. 11, periodic step marks 46 are formed on the long sheet 41. The portion having such a step mark 46 becomes a defective portion depending on the application, and the yield is deteriorated.

Various means for preventing or reducing the step marks have been proposed. For example, while sticking only a part of the winding start end of the long sheet to the surface of the winding core with an adhesive tape, the winding start end is changed from one side to the other side along the winding direction. A method of forming the film obliquely toward the surface is known (Patent Document 1). However, in this method, not only the winding start end portion may be insufficiently fixed, but also processing of the long sheet end portion is required, which is complicated.
Moreover, the winding core material which provided the notch part which provided the notch part along the width direction, the winding core material which provided the recessed part containing an elastic body along the width direction (patent document 2), and adhesive soft resin along the width direction. A winding core (Patent Document 3) provided with an embedded concave portion and a film winding body (Patent Document 4) provided with a step portion corresponding to the thickness of the long sheet along the width direction are known. However, all of these winding core materials need to be processed on the winding core material, which not only makes the operation complicated, but also increases the manufacturing cost.
Furthermore, a means is also known in which a foam cushioning material is provided on the back side of the long sheet-like flooring, and the gap formed when the long sheet-like flooring is wound around the winding core is filled with the cushioning material. (Patent Documents 5 and 6). However, this means requires a strict adjustment of the position where the foamable cushioning material is provided, and the operation is extremely complicated. And the winding core material used for winding will be limited.

JP-A-5-16222 Japanese Utility Model Publication No. 6-80764 JP-A-2005-75521 Utility Model Registration No. 3118688 JP-A-6-341214 JP 2004-217349 A

  Therefore, the problem of the present invention is that the processing of the end of the long sheet and the processing to the winding core material are unnecessary, and there is no need for strict position adjustment, and it can be applied to any winding core material and is used. An object of the present invention is to provide means for reducing or preventing the occurrence of the step marks by means of simple operation and low manufacturing costs.

The above problems are solved by the present invention.
A wound body in which a long sheet is wound around a winding core material,
The winding start end of the long sheet is covered by an insertion cover having an end thinner than the long sheet over its entire width,
The ratio (B / A) of the thickness (A) of the long sheet and the thickness (B) of the end of the insertion cover is 2/3 or less, and the insertion cover has a repulsion parameter of 3 g to It can be solved by a wound body characterized by comprising 2000 g of material.

The present invention also provides:
When winding the long sheet around the winding core, the winding start end of the long sheet is directly or by an insertion cover having an end thinner than the long sheet over its entire width. After covering the winding layer of the long sheet with a gap, the long sheet is further wound from above the insertion cover,
The ratio (B / A) of the thickness (A) of the long sheet and the thickness (B) of the end of the insertion cover is 2/3 or less, and the insertion cover has a repulsion parameter of 3 g to The present invention also relates to a method for manufacturing a wound body, which is made of 2000 g of material.

Furthermore, the present invention provides
A long sheet to be wound around a winding core material, the long sheet having an end thinner than the long sheet on the inner surface in the length direction from the winding start end of the long sheet Including a laminated portion with an insertion cover carried in a peelable manner against
The ratio (B / A) of the thickness (A) of the long sheet and the thickness (B) of the end of the insertion cover is 2/3 or less, and the insertion cover has a repulsion parameter of 3 g to The present invention also relates to a laminated part-containing long sheet characterized by comprising 2000 g of material.

  In the present invention, when the long sheet is wound around the winding core material, the step between the winding start end and the surface of the winding core material can be eliminated by the insertion cover. When rewinding from the core material and using it, it is possible to reduce or prevent the occurrence of step marks. In addition, the operation simply covers the insertion cover from above the step, and it is not necessary to process the end of the long sheet or to the winding core material. It can be applied to the core material and the manufacturing cost is low.

First, the principle of the present invention will be described with reference to FIGS.
In FIG. 1, in the wound body of the present invention in which a long sheet 1 is wound around a winding core material 2, the winding start end portion 3 and the gap portion 4 of the long sheet 1 are covered with an insertion cover 11. It is a typical partial expanded sectional view which shows a state. As shown in FIG. 1, the gap 4 generated by the step between the winding start end 3 of the first circumferential winding layer 1 a of the long sheet 1 and the surface of the winding core 2 is an insertion used in the present invention. Since it is covered by the cover 11, the trace of the step due to the gap 4 is not generated or greatly reduced in the second circumferential winding layer 1 b of the long sheet 1 and the subsequent winding layer. In addition, a gap 5A is newly generated between the winding upstream end portion 11A of the insertion cover 11 used in the present invention and the surface of the winding core material 2, and similarly the winding downstream side of the insertion cover 11 is wound. A gap 5B is newly generated between the end 11B and the surface of the first circumferentially wound layer 1a of the long sheet 1. However, the thickness (h) of the insertion cover 11 is thinner than the thickness (H) of the long sheet 1, and therefore each end of the insertion cover 11, that is, the winding upstream end 11A and the winding downstream. Since the thickness (h) of the side end portion 11B is thinner than the thickness (H) of the long sheet 1, the scale of the step marks due to the influence of the gap portion 5A and the gap portion 5B is reduced. That is, the number of winding laps of the long sheet layer forming the step trace is reduced. Further, by reducing the thickness (h) of each end portion of the insertion cover 11, the influence can be further reduced.

  Only the thickness of both end portions of the insertion cover can be made thinner than that of the central portion. This embodiment is shown in FIG. In the insertion cover 12 shown in FIG. 2, the thickness (h1) of each end, that is, the winding upstream end 12A and the winding downstream end 12B is thinner than the thickness (h2) of the central portion. Therefore, the gap formed between the winding upstream end 12A and the surface of the winding core 2, and the surface of the winding downstream end 12B and the first circumferential winding layer 1a of the long sheet 1 The size of the gap formed between the two can be greatly reduced. On the other hand, the relatively thick central portion can also counter the tightening force applied by the long sheet 1 wound many times thereon.

  When forming the wound body according to the present invention, for example, as shown in FIG. 1, the winding start end portion 3 of the long sheet 1 is attached to the surface of the winding core member 2 with, for example, an adhesive tape or the like. Adhering, and then covering the insertion cover 11 directly (that is, in direct contact with the winding start end 3) over the entire width (whole width direction) of the winding start end 3; In that state, the winding start end 3 is wound. In this way, a wound body in which the step mark is eliminated can be formed. In addition, the winding start end 3 of the long sheet 1 is attached to the surface of the winding core material 2 with, for example, an adhesive tape, and then wound around the long sheet 1 for one to several turns. It is also possible to cover with the insertion cover 11 after performing the above. In the case of covering with the insertion cover, strict positioning is not necessary, and the central portion of the insertion cover may be roughly applied to the step generation site.

  The insertion cover used in the present invention is prepared separately from the long sheet and can be used along the long sheet when forming the wound body. Alternatively, the insertion cover can be used in advance on the surface of the long sheet. It can also be attached. A typical embodiment that is preliminarily adhered to the surface of the long sheet is shown in FIGS. 3 to 5 (schematic partial cross-sectional views). FIG. 3 shows a laminated portion 6 in which the insertion cover 11 of the aspect shown in FIG. 1 is attached to the inner surface in the length direction (arrow S in FIG. 3) from the winding start end portion 3 of the long sheet 1. The long sheet 1 to contain is shown. When the laminated portion-containing long sheet 1 is wound around the winding core material on the insertion cover carrying surface 1A side, as shown in FIG. Thus, since the insertion cover 11 is disposed above the winding start end 3, the step marks can be reduced or eliminated. Since strictness is not required for the position adjustment when sticking the insertion cover 11, the sticking operation is very simple. When the long sheet 1 is rewound and used, the insertion cover 11 is not used.

  4 shows a laminated portion 6 in which the insertion cover 12 having the form shown in FIG. 2 is adhered to the inner surface in the length direction (arrow S in FIG. 4) from the winding start end portion 3 of the long sheet 1. The long sheet 1 to contain is shown. FIG. 5 shows a length including a laminated portion 6 in which a long insertion cover 13 is adhered to the inner surface in the length direction (arrow S in FIG. 5) from the winding start end portion 3 of the long sheet 1. A scale sheet 1 is shown. In addition, in the long insertion cover 13 of the aspect shown in FIG. 5, the thickness of the winding upstream end 13A is made thinner than the thickness of the other parts. The overall thickness may be uniform. The position of the winding downstream end of the long insertion cover 13 is not particularly limited, and may be matched with the end opposite to the winding start end 3 of the long sheet 1. In addition, the long sheet 1 shown in FIG.4 and FIG.5 is also wound around a winding core material by the insertion cover support surface 1A side.

  For the convenience of storage and transportation, the present invention is stored or transported by wrapping around a cylindrical or cylindrical winding core material (for example, a paper tube), and unwinding from the winding core material when used. The present invention can be effectively applied to any long sheet used in a flat state. In particular, it is effective in reducing or eliminating the step trace for a long sheet in which a step trace is formed when the sheet is rewound due to the influence of the step when wound around the winding core. Examples of such a long sheet include an adhesive tape, a flooring sheet, or a display member forming film.

  The thickness of the insertion cover used in the present invention is such that the ratio (B / A) between the thickness (A) of the long sheet and the thickness (B) of the end of the insertion cover is 2/3 or less, preferably 1/2 or less. By setting the ratio (B / A) to 2/3 or less, step marks can be effectively reduced or eliminated. Although the minimum of the said ratio (B / A) is not specifically limited, For example, it is 1/20. The insertion cover used in the present invention has a uniform thickness as shown in FIG. 1, or a thicker central portion as shown in FIG. ) Can be made thinner. Even when the central portion is thickened, it is preferable that the maximum thickness of the central portion is made thinner than the thickness of the long sheet.

  The length in the length direction of the insertion cover used in the present invention is not particularly limited as shown in FIGS. As shown in FIGS. 1 and 2, the lower limit is not limited as long as it covers the winding start end of the long sheet and can eliminate the step. For example, the winding used The ratio (L / S) of the length (L) to the circumference (S) of the outer peripheral surface of the core material is preferably 1/10 or more, more preferably 1/5 or more. An upper limit is not limited, either, For example, like the elongate insertion cover shown in FIG. 5, it can be made to correspond to the winding end end part (rewinding start end part) of a long sheet. Moreover, as shown in FIG.1 and FIG.2, when interposing only between the 1st surrounding winding layer 1a and the 2nd surrounding winding layer 1b of the elongate sheet 1, outer periphery of the winding core material to be used The ratio (L / S) of the length (L) to the circumference (S) of the surface is preferably ½ or less, more preferably ３ or less. Further, the length in the width direction may be the same as the width of the long sheet or may be wider than the width of the long sheet.

The material of the insertion cover used in the present invention is not particularly limited, but it is preferable to use a material that shows an appropriate repulsion parameter according to the outer diameter of the winding core material. The rebound parameter is preferably 3 g to 2000 g, more preferably 5 g to 150 g. The material having the rebound parameter can be appropriately prepared by appropriately selecting the type and thickness of the material. In the present specification, the rebound parameter is a value measured by the following method.
First, a sample (30 mm × 100 mm) having a thickness to be measured is prepared from the material to be measured. Subsequently, as shown in FIG. 6 (schematic perspective view), the sample 21 is placed on a pair of mounting tables 22 and 22. Each of the mounting tables 22 and 22 has a thickness of 2 mm, a height of 10 mm, and a depth (w in FIG. 6) of 20 mm. The distance between the mounting tables 22 and 22 (d in FIG. 6) is 25 mm. On the pair of mounting tables 22, 22, the sample 21 is placed so that the center portion of the sample 21 is positioned at the center of the gap between the mounting tables 22, 22. Next, after pressing the distal end portion 24 of the pressing probe 23 against the central portion of the sample 21, the pressing probe 23 is moved to a stroke (pushing length) that is predetermined according to the outer diameter of the winding core material. The state shown in FIG. 7 is pushed down at a speed of 20 mm / min in the direction of arrow P, and the repulsive force measured at the time of the deformation pushed down by the predetermined stroke (D in FIG. 7) is defined as a “repulsion parameter”. As shown in FIG. 8, the distal end portion 24 of the pressing probe 23 has a flat contact portion having a width (f in FIG. 8) of 1 mm.

The stroke (D) determined in advance according to the outer diameter of the winding core is:
D = r− (r ² −12.5 × 12.5) ^1/2
(Where r is the radius of the outer diameter of the winding core material)
Can be calculated according to the radius of the outer diameter of the winding core material. In addition, the relationship between the radius (r) of a winding core outer diameter and predetermined stroke (D) is shown in FIG. In FIG. 9, d is the distance (25 mm) between the mounting tables 22 and 22 shown in FIG. In FIG. 9, the three sides of a right triangle (r, a, and d / 2)
r ² = a ² + (d / 2) ²
Is established,
a = [r ² − (d / 2) ² ] ^1/2
It becomes. on the other hand,
Since “D = r−a” and “d = 25 mm”, the calculation formula:
D = r− (r ² −12.5 × 12.5) ^1/2
Is obtained.

  The insertion cover can be appropriately selected from a flexible resin sheet, a metal sheet, or a paper material sheet. The winding core material is also not particularly limited. For example, as the winding core material for the adhesive sheet, a paper tube having an inner diameter of 3 inches, a paper tube having an inner diameter of 6 inches to 10 inches, or the like is usually used. The present invention can be advantageously used for these paper tubes.

  EXAMPLES Hereinafter, the present invention will be specifically described by way of examples, but these do not limit the scope of the present invention.

<< Long sheet manufacturing example >>
(1) Production of long sheet A On one surface of a polyethylene terephthalate (PET) film (thickness = 100 μm) subjected to a peeling treatment on both sides, an acrylic adhesive [manufactured by Toyo Ink Manufacturing Co., Ltd .; BPS5626] Was applied to a layer thickness of 50 μm and dried. Subsequently, a foam (thickness = 1100 μm) was bonded to the acrylic pressure-sensitive adhesive layer to produce a laminate 1.
On the other hand, on one surface of release paper (thickness = 150 μm) subjected to release treatment on both sides, an acrylic pressure-sensitive adhesive (manufactured by Toyo Ink Manufacturing Co., Ltd .; BPS5626) is applied to a thickness of 50 μm and dried. Then, the acrylic pressure-sensitive adhesive layer was bonded to the foam layer surface of the laminate 1 to produce a long sheet A (total thickness = 1450 μm).

(2) Production of long sheet B On one surface of a polyethylene terephthalate (PET) film (thickness = 75 μm) subjected to peeling treatment on both sides, an acrylic pressure-sensitive adhesive [manufactured by Toyo Ink Mfg. Co., Ltd .; BPS5626] Was applied to a layer thickness of 50 μm and dried. Subsequently, a laminate 2 was produced by bonding a polyethylene terephthalate film (thickness = 125 μm) to the acrylic pressure-sensitive adhesive layer.
On the other hand, on one surface of release paper (thickness = 150 μm) subjected to release treatment on both sides, an acrylic pressure-sensitive adhesive (manufactured by Toyo Ink Manufacturing Co., Ltd .; BPS5626) is applied to a thickness of 50 μm and dried. Then, the acrylic pressure-sensitive adhesive layer was bonded to the surface of the PET film layer having a thickness of 125 μm of the laminate 2 to produce a long sheet B (total thickness = 450 μm).

(3) Production of long sheet C On one surface of a polyethylene terephthalate (PET) film (thickness = 25 μm) subjected to a peeling treatment on both sides, an acrylic pressure-sensitive adhesive [manufactured by Toyo Ink Manufacturing Co., Ltd .; BPS5626] Was applied to a layer thickness of 50 μm and dried. Subsequently, a laminate 3 was manufactured by bonding a polyethylene terephthalate film (thickness = 50 μm) to the acrylic pressure-sensitive adhesive layer.
On the other hand, on one surface of release paper (thickness = 75 μm) subjected to release treatment on both sides, an acrylic pressure-sensitive adhesive (manufactured by Toyo Ink Manufacturing Co., Ltd .; BPS5626) is applied to a thickness of 50 μm and dried. Then, the acrylic pressure-sensitive adhesive layer was bonded to the surface of the laminated film 3 having a thickness of 50 μm to produce a long sheet C (total thickness = 250 μm).

<< Examples 1-5 and Comparative Examples 1-2 >>
A wound body was created using an insertion cover of the type shown in FIG. 1 having a uniform thickness, and the effect of eliminating the step marks was confirmed.
Specifically, the winding start end of the long sheet A is adhered to the surface of a paper tube (diameter 100 mm; width 500 mm), and the gap formed by the winding start end and the paper tube surface After covering with the insertion cover shown in Table 1, the long sheet A was wound 50 times and stored in an environment of 40 ° C. for 30 days. The insertion cover used in Example 4 is a laminate in which an acrylic pressure-sensitive adhesive layer having a thickness of 50 μm is laminated on one surface of a release paper (thickness = 125 μm) subjected to a release treatment on both sides. there were.
Subsequently, the tape was rewound in order from the outer peripheral portion, and the number of rounds from the paper tube was visually evaluated in the following four stages. The results are shown in Table 1.
× ・ ・ ・ 30 or more △ ・ ・ ・ 20 or more and less than 30 lap ○ ・ ・ ・ 10 or more and less than 20 lap ◎ ・ ・ ・ less than 10 lap

Example 6
As a paper tube, instead of a paper tube having a diameter of 100 mm and a width of 500 mm, except for using a paper tube having a diameter of 200 mm and a width of 500 mm, the same operation as in Examples 1 to 5 is repeated to create a wound body, We confirmed the effect of eliminating the step marks.

Example 7
As a long sheet, instead of using the long sheet A, a wound body is created by repeating the same operations as in Examples 1 to 5 except that the long sheet B is used, and the step marks are eliminated. The effect was confirmed.

<< Example 8 and Comparative Example 3 >>
As a long sheet, instead of using the long sheet A, except for using the long sheet C, the same operation as in Examples 1 to 5 is repeated to create a wound body. The elimination effect was confirmed.

《Reference example》
Regarding the plates made of various materials and having various thicknesses, the repulsion parameter in the present invention was measured, and the effect of eliminating the step marks was confirmed by the method described in Examples 1 to 5. Evaluation was performed in the following two stages. The results are shown in Table 2.
○: The step disappears on the 30th lap from the paper tube × ... The step does not disappear on the 30th lap from the paper tube

  In Table 2, “Release paper” is a release paper (thickness = 125 μm) on both sides, and “Release paper + adhesive layer” is a release paper (thickness = 125 μm) on both sides. ) On one surface of which is laminated a 50 μm thick acrylic pressure-sensitive adhesive layer.

  When winding a long sheet of raw material (paper, plastic film, metal foil, etc.), adhesive tape or flooring, or a wrap film or aluminum foil used at home on a winding core By using the insertion cover of the invention, it is possible to reduce or prevent the generation of step marks.

It is sectional drawing which shows typically the principle of this invention from which a level | step difference trace is eliminated with an insertion cover. It is sectional drawing which shows typically the principle of this invention that a level | step difference trace is eliminated with the insertion cover of another aspect. It is a typical sectional view of a lamination part content long sheet by the present invention which carries an insertion cover on the surface of a long sheet. It is a typical sectional view of a lamination part content long sheet by the present invention which carries an insertion cover of another mode on the surface of a long sheet. It is a typical sectional view of a lamination part content long sheet by the present invention which carries an insertion cover of another mode on the surface of a long sheet. It is a typical perspective view which shows the measuring method of a repulsion parameter. It is a typical side view explaining the stroke in the case of a repulsion parameter measurement. It is a typical side view which shows the structure of the front-end | tip flat contact part of the press probe used for the measurement of a repulsion parameter. It is explanatory drawing of the meaning of the stroke used in the case of a repulsion parameter measurement. It is typical sectional drawing of the winding body by a prior art. It is a typical perspective view which shows the elongate sheet which unwound the wound body of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Long sheet; 1a ... 1st surrounding layer; 1b ... 2nd surrounding layer;
2 ... winding core material; 3 ... winding start end; 4 ... gap portion;
5A: void portion; 5B ... void portion; 6 ... laminated portion;
11, 12 ... insertion cover; 11A, 12A, 13A ... upstream end of winding;
11B, 12B ... winding downstream end; 13 ... elongate insertion cover;
21 ... Sample; 22 ... Place; 23 ... Pressing probe;
24 ... tip part; 40 ... wound body; 41 ... long sheet;
42 ... winding start end; 43 ... winding core material; 44 ... gap portion;
45 ... depression; 46 ... traces of steps.

Claims (3)

A wound body in which a long sheet is wound around a winding core material,
The winding start end of the long sheet is covered by an insertion cover having an end thinner than the long sheet over its entire width,
The ratio (B / A) of the thickness (A) of the long sheet and the thickness (B) of the end of the insertion cover is 2/3 or less, and the insertion cover has a repulsion parameter of 3 g to A wound body characterized by comprising 2000 g of material. When winding the long sheet around the winding core, the winding start end of the long sheet is directly or by an insertion cover having an end thinner than the long sheet over its entire width. After covering the winding layer of the long sheet with a gap, the long sheet is further wound from above the insertion cover,
The ratio (B / A) of the thickness (A) of the long sheet and the thickness (B) of the end of the insertion cover is 2/3 or less, and the insertion cover has a repulsion parameter of 3 g to A method for producing a wound body comprising 2000 g of material. A long sheet to be wound around a winding core material, the long sheet having an end thinner than the long sheet on the inner surface in the length direction from the winding start end of the long sheet Including a laminated portion with an insertion cover carried in a peelable manner against
The ratio (B / A) of the thickness (A) of the long sheet and the thickness (B) of the end of the insertion cover is 2/3 or less, and the insertion cover has a repulsion parameter of 3 g to A laminated part-containing long sheet comprising 2000 g of material.

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