JP2018199566A - Web fixing method, web winding method and winding roll body - Google Patents

Abstract

To provide a web fixing method, a web winding method and a winding roll body, capable of suppressing generation of a step-off trace as much as possible.SOLUTION: The web fixing method, used for fixing a web start end region Wsr onto a cylindrical winding core in winding a belt-like web W around the winding core 1 in a roll state, includes the steps of: attaching a first tape 2 onto a peripheral barrel surface 1a of the winding core; attaching the web start end region onto an outer surface of the first tape through an adhesive layer; and providing a second tape 3 to cover a web start end Ws and to stride over the outer surface of the web and the peripheral barrel surface of the winding core.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a web fixing method, a web winding method, and a winding roll body for fixing a starting end region of a web to a winding core when winding a belt-shaped web around a cylindrical winding core. About.

  A belt-like web such as a plastic film or a plastic sheet is usually wound around a cylindrical core in a roll shape to form a take-up roll body and stored in this state. In use, after a necessary length is unwound from the winding roll body, it is cut, and the cut web is used for various purposes. A method for winding such a strip-shaped web around a core is known from Patent Document 1, for example. In this case, a double-sided pressure-sensitive adhesive tape is affixed to the circumferential surface of the winding core, a starting edge region of the web is affixed to the outer surface of the double-sided pressure-sensitive adhesive tape to fix the starting edge region, and then the winding core is rotated to rotate the winding core. The web is wound up in a roll shape on the circumferential surface of the core.

  Here, when the belt-like web is wound around the winding core like the conventional example, a minute space corresponding to the thickness of the web and the double-sided pressure-sensitive adhesive tape is formed on the rear side in the winding direction of the starting end of the web. It is inevitable that it will occur. For this reason, when the web is wound up several times, a so-called step mark along the starting edge of the web is generated in the portion of the web positioned in the same phase as the starting edge due to the winding pressure acting on the space. There is a problem of doing. Since the web portion having such a step mark cannot be used depending on the application, for example, it is necessary to suppress the generation of the step mark as much as possible in order to increase the utilization efficiency of the winding roll body.

  As a method for suppressing the occurrence of such step marks, it has been proposed to wrap a cushioning material around the circumferential surface of the core (see, for example, Patent Document 2). However, when the web is wound many times, the cushioning material is compressed and deformed by the web winding pressure, which causes a problem that the web is wrinkled.

JP 2007-253422 A JP 2009-242059 A

  In view of the above points, the present invention provides a web fixing method, a web winding method, and a winding roll body that can suppress the occurrence of step marks as much as possible. And

  In order to solve the above problems, when winding a belt-like web around a cylindrical core in a roll shape, the web fixing method of the present invention for fixing the web start end region to the core is A step of affixing a first tape to the circumferential body surface, a step of affixing a web start end region to the outer surface of the first tape via an adhesive layer, a web outer surface and a winding core covering the web start end And a step of providing a second tape so as to straddle the circumferential body surface.

  Moreover, the web winding method of the present invention for winding a belt-shaped web around a cylindrical winding core in a roll shape includes a first tape affixed to the circumferential surface of the winding core, and the outer surface of the first tape. After pasting the web start area through the adhesive layer, the process of crimping the second tape so as to cover the web start edge and straddle the outer surface of the web and the circumferential surface of the roll, and rotating the roll And a step of winding the web around the circumference of the core in a roll shape.

  Furthermore, the winding roll body of the present invention comprising a cylindrical winding core and a strip-shaped web wound around the winding core in a roll shape is affixed to the peripheral body surface of the winding core, and the start end region of the web A double-sided pressure-sensitive adhesive tape, and a single-sided pressure-sensitive adhesive tape that covers the starting end of the web affixed to the double-sided pressure-sensitive adhesive tape so as to straddle the outer surface of the web and the circumferential surface of the core. And

  According to the present invention, when winding the belt-shaped web in a roll shape around the core, although there is a minute space according to the thickness of the web and the double-sided pressure-sensitive adhesive tape on the rear side in the winding direction of the starting end of the web, Since the winding pressure when the web is wound several times is dispersed and supported by the second tape, the generation of so-called step marks along the starting edge of the web is suppressed as much as possible.

(A) is a schematic cross section of the winding roll body of embodiment of this invention, (b) is an enlarged view of the A section of (a). The figure explaining the air bite which arises by pressure bonding of the 2nd tape. The schematic cross section which shows the modification of embodiment of this invention.

  Hereinafter, a web fixing method, a web winding method, and a winding roll body according to an embodiment of the present invention will be described with reference to the drawings.

  With reference to FIG. 1, RB is the winding roll body of this embodiment. The winding roll body RB includes a cylindrical winding core 1 and a belt-like web W wound around the winding core 1 in a roll shape. The core 1 preferably has a strength necessary for winding the web W. For example, paper (including paper impregnated with a resin described later), rubber, acrylonitrile / butadiene / styrene resin, polycarbonate Resins such as resin and vinyl chloride resin, various reinforced plastic materials reinforced with reinforcing fibers such as glass fiber, carbon fiber and aramid fiber, and metals and alloys such as iron, aluminum, copper and stainless steel, and those It can comprise with the composite_body | complex etc. Examples of the resin impregnated in the paper include phenol resin, epoxy resin, styrene resin, urethane resin, acrylic resin, polyester resin, melamine resin, and the like. The dimensions of the core 1 are appropriately set according to the width, length and thickness of the web W, the tension at the time of winding, etc. For example, the length of the core 1 corresponding to the width of the web W is 0.005 m to 5 m, The inner diameter can be set in the range of 0.5 cm to 50 cm, and the wall thickness can be set in the range of 1 mm to 50 mm.

  As the web W, a single-layer or multilayer plastic film, paper, metal foil, adhesive sheet, or the like can be used. Preferred examples of the plastic film include thermoplastic resins such as polypropylene resin, polyethylene resin, acrylonitrile butadiene styrene resin, polyethylene terephthalate, polystyrene, polyimide, polycarbonate, and polyurethane. Although it does not specifically limit as thickness of the web W, 5-1000 micrometers is preferable and 50-500 micrometers is especially preferable.

  The take-up roll body RB further includes a first tape 2 that is affixed to the peripheral body surface 1 a of the core 1. The start end region Wsr of the web W is affixed to the outer surface 2a of the first tape 2 via an adhesive, whereby the start end region Wsr is fixed to the core 1. In the present invention, the start end region Wsr of the web W refers to a region extending from the start end Ws of the web W to a predetermined length (for example, several centimeters). The predetermined length is not limited to several centimeters and can be exemplified by about 1 cm to 10 cm. As the 1st tape 2, the double-sided adhesive tape which the adhesive layer exposed on both surfaces can be used. Examples of the double-sided pressure-sensitive adhesive tape 2 include those in which a pressure-sensitive adhesive layer is provided on both sides of a core material and those in which only a pressure-sensitive adhesive layer without a core material is provided.

  The winding roll RB is provided so as to cover the start surface Ws of the web W affixed to the outer surface 2 a of the first tape 2 and straddle the outer surface Wa of the web W and the circumferential body surface 1 a of the core 1. A second tape 3 is further provided. As the 2nd tape 3, the single-sided adhesive tape which provided the adhesive layer on the one side of a core material can be used.

  The double-sided pressure-sensitive adhesive tape as the first tape 2 and the single-sided pressure-sensitive adhesive tape as the second tape 3 may be laminated with a plurality of pressure-sensitive adhesive layers or other functional layers as necessary. Examples of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer include acrylic, rubber-based, silicone-based, polyester-based, urethane-based, and epoxy-based ones, which are appropriately selected and used in combination of one or two types. Also good. Although it does not specifically limit as thickness of an adhesive layer, As for each thickness of the double-sided adhesive tape 2 and the single-sided adhesive tape 3, 1-200 micrometers is preferable and 5-100 micrometers is more preferable. If the thickness is less than 1 μm, the stiffness of the tape will be weak, making it difficult for workers to handle, making it difficult to apply straight and wrinkle so as to cover the core 1 or web W, and insufficient adhesive strength. On the other hand, if the thickness exceeds 200 μm, a defect such as a step mark due to a step on the end face of the tape may occur. Although it does not specifically limit as the width | variety of the double-sided adhesive tape 2 and the single-sided adhesive tape 3, 1 mm-100 mm are preferable, 3 mm-80 mm are still more preferable, 5 mm-50 mm are more preferable. If the width is less than 1 mm, the stiffness is weak because the width is narrow, making it difficult for workers to handle, and it may be difficult to apply straight and wrinkle so as to cover the core 1 or the web W, There is a possibility that the adhesiveness for fixing the web W may be insufficient. On the other hand, if the width exceeds 100 mm, the width becomes wide and the stiffness becomes strong, so that it becomes difficult for the operator to handle, and it may be difficult to apply straight and wrinkle so as to cover the core 1 or the web W. The core material provided with the pressure-sensitive adhesive layer is suitably selected from paper, nonwoven fabric, sheet-like rubber, sheet-like polymer resin, metal foil such as aluminum or copper, etc. Can do. Examples of the polymer resin used for the core material include polyethylene resin, polypropylene resin, styrene resin, acrylic resin, and polyester resin.

  In this way, the web W is wound around the cylindrical core 1 in a roll shape to form a take-up roll body RB, and stored in this state, for example, suspended in the air. Hereinafter, a double-sided adhesive tape is used as the first tape 2, a single-sided adhesive tape is used as the second tape 3, and the web winding method for winding the belt-like web W around the cylindrical core 1 in a roll shape is carried out. A form is demonstrated.

  When winding the web W around the core 1, first, the start end region Wsr of the web W is fixed to the core 1. That is, as shown in FIG. 1 (b), a double-sided adhesive tape 2 is affixed to an arbitrary position on the circumferential body surface 1a of the core 1, and the web is placed on the outer surface 2a of the double-sided adhesive tape 2 via an adhesive layer. A starting end region Wsr of W is pasted. Next, the single-sided adhesive tape 3 is pressure-bonded so as to cover the start surface Ws of the web W affixed to the double-sided adhesive tape 2 and straddle the outer surface Wa of the web W and the peripheral body surface 1a of the core 1.

  Next, the web W is wound around the core 1 at a predetermined speed and tension. The winding speed can be set in the range of 1 m / min to 500 m / min, for example, and the tension can be set in the range of 1 to 1000 N / m (per width of 1 m), for example.

  Here, at the time of winding the web W, a minute space S corresponding to the thickness of the web W and the double-sided pressure-sensitive adhesive tape 2 exists on the rear side in the winding direction (see FIG. 1) of the starting end Ws of the web W. When the web W is wound up several times, the winding pressure of the web W acts toward the space S. The winding pressure of the web W is dispersed and supported by the single-sided adhesive tape 3. For this reason, generation | occurrence | production of what is called a level | step difference along the starting end Ws of the web W comes to be suppressed as much as possible.

  As described above, according to the present embodiment, since the single-sided adhesive tape 3 is provided so as to cover the start surface Ws of the web W and straddle the outer surface Wa of the web W and the peripheral body surface 1a of the core 1, In addition, the winding pressure when the web W is wound is dispersed and supported by the single-sided adhesive tape 3. For this reason, generation | occurrence | production of what is called a level | step difference along the starting end Ws of the web W can be suppressed as much as possible. Further, since the cushioning material is not wound around the circumferential body surface 1a of the core 1 as in the conventional example, wrinkles due to compression deformation of the cushioning material do not occur in the web W.

  By the way, when the single-sided adhesive tape 3 is crimped and provided, as shown in FIG. 2, if the air reservoir Ab remains between the single-sided adhesive tape 3 and the web W, the single-sided adhesive tape 3 is waved, and as a result, Bubble marks may occur on the web W. Since the portion of the web W having such bubble marks cannot be used depending on the application, it is necessary to remove the air reservoir Ab as much as possible.

  In order to remove air pockets, it is preferable to use, as the second tape 3, a single-sided adhesive tape in which grooves 31 having a predetermined pattern are formed in the inner surface (adhesive layer) as shown in FIG. According to this, since the air reservoir Ab generated when the single-sided adhesive tape 3 is crimped can be released through the groove 31, the air reservoir Ab can be removed as much as possible. The cross-sectional shape of the groove 31 is not particularly limited, and may be a triangle or a semicircle in addition to the rectangular shape shown in the figure. Moreover, the pattern of the groove | channel 31 may be regularly formed so that it may extend in parallel or diagonally with respect to the side edge 3a of the winding direction rear side of the single-sided adhesive tape 3, or may be formed irregularly. Good. The method for producing such a single-sided pressure-sensitive adhesive sheet used as the second tape 3 is, for example, preparing a release paper that is embossed so as to have a convex portion of a desired groove pattern on the surface, and the pressure-sensitive adhesive layer on the surface. By laminating and transferring the pattern, an adhesive tape having a desired groove recess can be obtained.

Further, as the second tape 3, a single-sided adhesive tape provided with a plurality of through holes penetrating in the thickness direction may be used. According to this, since the air reservoir Ab generated when the single-sided adhesive tape 3 is pressure-bonded can be released through the through hole, the air reservoir Ab can be removed as much as possible. The through hole can be opened by punching using a punching blade or laser processing. In this case, the diameter of the through hole is preferably set in the range of 0.1 to 300 μm, and is set in the range of 0.5 to 150 μm. It is more preferable. If the hole diameter is less than 0.1 μm, it is difficult for air to escape, whereas if it exceeds 300 μm, the through-holes may be too conspicuous and the appearance may be impaired. The hole density of the through holes is preferably 30 to 50,000 / 100 cm ² , and more preferably 100 to 10,000 / 100 cm ² . When the hole density is less than 30/100 cm ² , the air is difficult to escape, while when it exceeds 50,000 / 100 cm ² , the strength may be reduced. The planar view shape of the through hole is not particularly limited, and a circular shape, an elliptical shape, a polygonal shape, or the like can be appropriately employed. Examples of the laser used for laser processing include carbon dioxide laser, TEA-CO ₂ laser, YAG laser, UV-YAG laser, YVO ₄ laser, YLF laser, etc. Among them, carbon dioxide laser from the viewpoint of production efficiency and cost. Is preferred. For example, when using a carbon dioxide laser, it is preferable that the base material which comprises the 2nd tape 3 contains 15-50 mass% of resin which has an absorption peak in the wavelength of a carbon dioxide laser. The resin can be selected from styrene-acrylic acid alkyl ester copolymers, styrene-butadiene-styrene block copolymers, butylene succinate adipate, and polymethyl methacrylate.

  Next, in order to confirm the effect of the present invention, the following experiment was performed. In this experiment, a plastic film (“FSK350SB” manufactured by Lintec Corporation) having a thickness of 85 μm and a width of 300 mm was used as the web W. The core 1 is made of polypropylene resin having an outer diameter of 178 mm, a wall thickness of 13 mm, and a width of 300 mm (“PP core” manufactured by Shikoku Sekisui Kogyo Co., Ltd.). A double-sided pressure-sensitive adhesive tape 2 having a width of 10 mm (“Double-sided tape # 105” manufactured by Fuji Sangyo Co., Ltd.) was applied to the entire width of the core 1, and a starting end region Wsr of the web W was attached to the outer surface 2 a of the double-sided adhesive tape 2. At this time, the starting end Ws of the web W was fixed so as to protrude about 5 mm from the side edge on the rear side in the winding direction of the double-sided pressure-sensitive adhesive tape 2. Next, the polyester 30 having a width of 30 mm as the single-sided adhesive tape 3 is formed so as to cover the start surface Ws of the web W affixed to the double-sided adhesive tape 2 and straddle the outer surface Wa of the web W and the peripheral body surface 1a of the core 1. An adhesive tape (“631S # 25” manufactured by Teraoka Seisakusho) was provided by pressure bonding. Then, the web W was wound up for 500 m at a tension of 200 N / m and a speed of 60 m / min. The winding roll body thus obtained was designated as “Example 1”.

  Moreover, as the single-sided adhesive tape 3, a polyvinyl chloride adhesive tape ("P-" manufactured by Lintec Corporation) in which grooves 31 extending obliquely with respect to the side edge of the single-sided adhesive tape 3 and having a substantially triangular cross section are opened at intervals of 660 μm. Except for the point of using 221ZW (ER) "), a winding roll body obtained by the same method as in Example 1 was designated as" Example 2 ". Moreover, the winding roll body obtained by the method similar to the said Example 1 was set as the "comparative example 1" except the point which does not provide the single-sided adhesive tape 3 for the comparison with these Examples 1-2.

  Next, the winding roll bodies of these Examples 1 and 2 and Comparative Example 1 were evaluated. The evaluation method was that each winding roll body was stored in a suspended state for 1 week, then rolled back at a tension of 30 N / m and a speed of 5 m / min, and the presence or absence of a step mark was visually confirmed. The results are shown in Table 1. Regarding the evaluation of the step marks, the case where the maximum distance from which the step mark is confirmed from the starting edge Ws of the web W is less than 20 m is “◯”, the case where the maximum distance is 20 to 40 m is “△”, and the maximum distance is 40 m. The case where it exceeded was made into "x". According to this, it turned out that generation | occurrence | production of a level | step difference mark can be suppressed by covering the start end Ws of the web W with the single-sided adhesive tape 3. FIG.

  Moreover, about evaluation of an air pocket, the fixing operation | work of the start end Ws of the web W of the winding roll body of Examples 1-2 was performed 5 times, and the frequency | count that the air pocket Ab generate | occur | produced was confirmed among 5 times. “◯” indicates that the air accumulation Ab does not occur in all five times, “△” indicates that the air is caught in the first to third times, and “×” indicates that the air is stuck in the fourth to fifth times. did. According to this, it turned out that an air pocket can be prevented by providing the groove | channel 31 in the single-sided adhesive tape 3 like Example 2. FIG.

  In addition, this invention is not limited to the said embodiment and Example. In the said Example 2, although the single-sided adhesive tape 3 in which the groove | channel 31 was provided is used, the single-sided adhesive tape 3 in which the through-hole was previously formed may be used, and after providing the single-sided adhesive tape 3, it is single-sided. You may make it form a through-hole using the needle | hook etc. in the part to which the air bit of the adhesive tape 3 produced.

  RB ... winding roll body, W ... web, Wa ... outer surface of web W, Ws ... start end of web W, Wsr ... start end region of web W, 1 ... core, 1a ... peripheral body surface of core 1, 2 ... double-sided adhesive tape (first tape), 2a ... outer surface of double-sided adhesive tape 2, 3 ... single-sided adhesive tape (second tape).

Claims (3)

In winding the belt-shaped web around the cylindrical core in a roll shape, in the fixing method of the web for fixing the starting end region of the web to the core,
Applying the first tape to the circumferential surface of the core;
A step of attaching a web start end region to the outer surface of the first tape via an adhesive layer;
And a step of providing a second tape so as to cover the start end of the web and straddle the outer surface of the web and the circumferential surface of the core. In a web winding method for winding a belt-shaped web around a cylindrical core in a roll shape,
The first tape is applied to the circumferential surface of the winding core, and the web start end region is applied to the outer surface of the first tape via the adhesive layer, and then the web outer edge and the core are covered with the web starting end. Providing a second tape so as to straddle the circumferential body surface;
A method of winding the web, the method comprising a step of rotating the core and winding the web around the surface of the core in a roll shape. In a winding roll body comprising a cylindrical winding core and a belt-shaped web wound around the winding core in a roll shape,
A double-sided pressure-sensitive adhesive tape that is affixed to the circumferential surface of the core and the web starting edge region is affixed;
A winding roll comprising a single-sided pressure-sensitive adhesive tape that covers the starting end of a web that is affixed to a double-sided pressure-sensitive adhesive tape and that is pressure-bonded so as to straddle the outer surface of the web and the circumferential surface of the core.

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