JP6837386B2 - Web fixing method, web winding method, and winding roll body - Google Patents

Description

According to the present invention, when winding a strip-shaped web around a tubular winding core in a roll shape, a method for fixing the web to fix the starting end region of the web to the winding core, a method for winding the web, and a winding roll body. Regarding.

A strip-shaped web such as a plastic film or a plastic sheet is usually wound around a tubular core in a roll shape to form a winding roll body, and is stored in this state. In use, the required length is unwound from the take-up roll body and then cut, and the cut web is used for various purposes. A method for winding such a strip-shaped web around a winding core is known, for example, in Patent Document 1. In this product, a double-sided adhesive tape is attached to the peripheral surface of the winding core, a starting end area of the web is attached to the outer surface of the double-sided adhesive tape to fix the starting end area, and then the winding core is rotated to wind the winding core. The web is rolled up on the peripheral surface of the core.

Here, when the strip-shaped web is wound around the winding core in a roll shape as in the above conventional example, a minute space corresponding to the thickness of the web and the double-sided adhesive tape is formed on the rear side of the starting end of the web in the winding direction. It is inevitable that it will occur. For this reason, when the web is wound multiple times, the winding pressure acts toward the above space, so that so-called step marks along the start end of the web are generated in the part of the web located in the same phase as the start end. There is a problem of doing. Since the web portion having such a step mark cannot be used depending on the application, it is necessary to suppress the occurrence of the step mark as much as possible in order to improve the utilization efficiency of the winding roll body, for example.

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

Japanese Unexamined Patent Publication No. 2007-253422 Japanese Unexamined Patent Publication No. 2009-24259

In view of the above points, it is an object of the present invention to provide a web fixing method, a web winding method, and a winding roll body capable of suppressing the occurrence of step marks as much as possible. And.

In order to solve the above problems, when winding a strip-shaped web around a tubular core in a roll shape, the method for fixing the web of the present invention for fixing the starting end region of the web to the core is a method of fixing the web of the core. The step of sticking the first tape on the peripheral surface over the entire width direction , the step of sticking the starting region of the web on the outer surface of the first tape via the adhesive layer, and the step of covering the starting end of the web and covering the web. It is characterized by including a step of providing a second tape over the entire width direction of the web so as to straddle the outer surface of the web and the peripheral surface of the winding core.

Further, in the method of winding the web of the present invention for winding the strip-shaped web around the tubular winding core in a roll shape, the first tape is attached to the peripheral surface of the winding core over the entire width direction. After attaching the starting end area of the web to the outer surface of the first tape via an adhesive layer, the starting edge of the web is covered and the outer surface of the web and the peripheral surface of the winding core are straddled over the entire width direction of the web. It is characterized by including a step of crimping the second tape over the same direction and a step of rotating the winding core and winding the web around the peripheral surface of the winding core in a roll shape.

Further, the winding roll body of the present invention including a tubular winding core and a strip-shaped web wound around the winding core in a roll shape is attached to the peripheral surface of the winding core over the entire width direction. In addition, the entire width direction of the web is covered with the double-sided adhesive tape to which the starting area of the web is attached and the outer surface of the web and the peripheral surface of the winding core so as to cover the starting end of the web attached to the double-sided adhesive tape. It is characterized by including a single-sided adhesive tape that is crimped over.

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

(A) is a schematic cross-sectional view of the winding roll body of the embodiment of the present invention, and (b) is an enlarged view of part A of (a). The figure explaining the air biting caused by the crimping of the 2nd tape. FIG. 6 is a schematic cross-sectional view showing a modified example of the embodiment of the present invention.

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

With reference to FIG. 1, the RB is a take-up roll body of the present embodiment. The take-up roll body RB includes a tubular winding core 1 and a strip-shaped web W wound around the winding core 1 in a roll shape. It is desirable that the winding core 1 has the strength necessary for winding the web W. For example, paper (including paper impregnated with a resin described later), rubbers, acrylonitrile-butadiene-styrene resin, and polycarbonate. Resins such as resins and vinyl chloride resins, 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 theirs. It can be composed of a complex of. Examples of the resin impregnated in the paper include phenol resin, epoxy resin, styrene resin, urethane resin, acrylic resin, polyester resin, and melamine resin. The dimensions of the winding 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 winding 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 multi-layer plastic film, paper, metal foil, an adhesive sheet, or the like can be used. As the plastic film, thermoplastic resins such as polypropylene resin, polyethylene resin, acrylonitrile butadiene styrene resin, polyethylene terephthalate, polystyrene, polyimide, polycarbonate, and polyurethane can be preferably exemplified. The thickness of the web W is not particularly limited, but is preferably 5 to 1000 μm, and particularly preferably 50 to 500 μm.

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

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

For the double-sided adhesive tape as the first tape 2 and the single-sided adhesive tape as the second tape 3, a plurality of pressure-sensitive adhesive layers may be laminated or other functional layers may be laminated, if necessary. Examples of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer include acrylic-based, rubber-based, silicone-based, polyester-based, urethane-based, and epoxy-based adhesives. Is also good. The thickness of the pressure-sensitive adhesive layer is not particularly limited, but the thickness of each of the double-sided pressure-sensitive adhesive tape 2 and the single-sided pressure-sensitive adhesive tape 3 is preferably 1 to 200 μm, more preferably 5 to 100 μm. If it is less than 1 μm, the stiffness of the tape becomes weak and it becomes difficult for the worker to handle it, and it may be difficult to apply it straight so as to cover the core 1 or the web W without wrinkles, and the adhesive strength is insufficient. On the other hand, if it exceeds 200 μm, a problem such as a step mark due to a step on the end surface of the tape may occur. The widths of the double-sided adhesive tape 2 and the single-sided adhesive tape 3 are not particularly limited, but are preferably 1 mm to 100 mm, more preferably 3 mm to 80 mm, and even more preferably 5 mm to 50 mm. If the width is less than 1 mm, the width is narrow and the stiffness becomes weak, which makes it difficult for the worker to handle, and it may be difficult to apply it straight and without wrinkles so as to cover the winding core 1 or the web W. There is a risk that the adhesiveness for fixing the web W will be insufficient. On the other hand, if it exceeds 100 mm, the width becomes wide and the stiffness becomes strong, which makes it difficult for the worker to handle, and it may be difficult to apply the coating straight and without wrinkles so as to cover the winding core 1 or the web W. The core material to which the pressure-sensitive adhesive layer is provided is appropriately selected from papers, non-woven fabrics, sheet-shaped rubbers, sheet-shaped polymer resins, metal foils such as aluminum and copper, and used as a single layer or laminated. Can be done. 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 a tubular winding core 1 in a roll shape to form a winding roll body RB, and is stored in this state, for example, suspended in the air. Hereinafter, an implementation of a web winding method for winding a strip-shaped web W into a tubular winding core 1 in a roll shape by using a double-sided adhesive tape as the first tape 2 and a single-sided adhesive tape as the second tape 3. The form will be described.

When winding the web W around the winding core 1, first, the start end region Wsr of the web W is fixed to the winding core 1. That is, as shown in FIG. 1B, the double-sided adhesive tape 2 is attached to an arbitrary position on the peripheral body surface 1a of the winding core 1, and the web is provided on the outer surface 2a of the double-sided adhesive tape 2 via the adhesive layer. The start region Wsr of W is attached. Next, the single-sided adhesive tape 3 is crimped so as to cover the start end Ws of the web W attached to the double-sided adhesive tape 2 and straddle the outer surface Wa of the web W and the peripheral surface 1a of the winding core 1.

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

Here, when the web W is wound, there is a minute space S corresponding to the thickness of the web W and the double-sided adhesive tape 2 on the rear side in the winding direction (see FIG. 1) of the start end Ws of the web W. When the web W is wound up many times, the winding pressure of the web W acts toward the space S, and the winding pressure of the web W is dispersed and supported by the single-sided adhesive tape 3. Therefore, the generation of so-called step marks along the starting end Ws of the web W is 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 end Ws of the web W and straddle the outer surface Wa of the web W and the peripheral surface 1a of the winding core 1, the number of layers is increased. In addition, the winding pressure when the web W is wound is dispersed and supported by the single-sided adhesive tape 3. Therefore, it is possible to suppress the occurrence of so-called step marks along the starting end Ws of the web W as much as possible. Further, since the cushioning material is not wound around the peripheral body surface 1a of the winding core 1 as in the conventional example, wrinkles due to the compressive deformation of the cushioning material do not occur on the web W.

By the way, when the single-sided adhesive tape 3 is provided by crimping, as shown in FIG. 2, if an air pool Ab remains between the single-sided adhesive tape 3 and the web W, the single-sided adhesive tape 3 undulates, and as a result, the single-sided adhesive tape 3 undulates. 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 pool Ab as much as possible.

In order to remove the air pool, it is preferable to use as the second tape 3 a single-sided adhesive tape in which a groove 31 having a predetermined pattern is recessed on the inner surface (adhesive layer) as shown in FIG. According to this, since the air pool Ab generated when the single-sided adhesive tape 3 is crimped can be released through the groove 31, the air pool 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 a rectangle as shown in the figure. Further, the pattern of the groove 31 may be regularly formed so as to extend parallel to or diagonally to the side edge 3a on the rear side in the winding direction of the single-sided adhesive tape 3, or may be irregularly formed. Good. As a method for producing a single-sided adhesive sheet used as such a second tape 3, for example, a release paper having an embossed shape so as to have a convex portion of a desired groove pattern on the surface is prepared, and an adhesive layer is provided on the surface. The adhesive tape having a recess of a desired groove can be obtained by laminating and transferring the pattern.

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 pool Ab generated when the single-sided adhesive tape 3 is crimped can be released through the through hole, the air pool Ab can be removed as much as possible. The through hole can be opened by punching using a punching blade or laser machining. In this case, the hole 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. Is more preferable. If the pore diameter is less than 0.1 μm, it becomes difficult for air to escape, while if it exceeds 300 μm, the through holes may become too conspicuous and spoil the appearance. The hole density of the through holes ^{is preferably 30 to 50,000 pieces / 100 cm 2} , and more preferably 100 to 10,000 pieces / 100 cm ^2. If the pore density is ^{less than 30 pieces / 100 cm 2} , it becomes difficult for air to escape, but if it ^{exceeds 50,000 pieces / 100 cm 2} , the strength may decrease. The plan-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 adopted. Examples of the type of 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, cost, etc. Is preferable. For example, when a carbon dioxide laser is used, it is preferable that the base material constituting the second tape 3 contains 15 to 50% by mass of a resin having an absorption peak at the wavelength of the carbon dioxide laser. The resin can be selected from styrene-acrylic acid alkyl ester copolymer, styrene-butadiene-styrene block copolymer, butylene succinate adipate, and polymethyl methacrylate.

Next, in order to confirm the effect of the present invention, the following experiment was carried out. 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. As the winding core 1, a polypropylene resin having an outer diameter of 178 mm, a wall thickness of 13 mm, and a width of 300 mm (“PP winding core” manufactured by Shikoku Sekisui Kogyo Co., Ltd.) is used. A double-sided adhesive tape 2 having a width of 10 mm (“double-sided tape # 105” manufactured by Fuji Sangyo Co., Ltd.) was attached to the entire width of the winding core 1, and the start end region Wsr of the web W was attached to the outer surface 2a of the double-sided adhesive tape 2. At this time, the starting end Ws of the web W was fixed so as to project about 5 mm from the side edge on the rear side in the winding direction of the double-sided adhesive tape 2. Next, the single-sided adhesive tape 3 is made of polyester having a width of 30 mm so as to cover the start end Ws of the web W attached to the double-sided adhesive tape 2 and straddle the outer surface Wa of the web W and the peripheral surface 1a of the winding core 1. Adhesive tape (“631S # 25” manufactured by Teraoka Seisakusho) was crimped and provided. 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 take-up roll body thus obtained was designated as "Example 1".

Further, as the single-sided adhesive tape 3, a polyvinyl chloride adhesive tape (“P-” manufactured by Lintec Corporation, in which grooves 31 having a substantially triangular cross section and extending diagonally with respect to the side edge of the single-sided adhesive tape 3 are provided at intervals of 660 μm). 221ZW (ER) ”) was used, and the winding roll body obtained by the same method as in Example 1 above was designated as“ Example 2 ”. Further, for comparison with Examples 1 and 2, the take-up roll body obtained by the same method as in Example 1 above was designated as "Comparative Example 1" except that the single-sided adhesive tape 3 was not provided.

Next, the take-up rolls of Examples 1 and 2 and Comparative Example 1 were evaluated. In the evaluation method, each take-up roll was stored in the air for one week, then rewound at a tension of 30 N / m and a speed of 5 m / min, and the presence or absence of step marks was visually confirmed. The results are shown in Table 1. Regarding the evaluation of the step mark, "○" is when the maximum distance where the step mark is confirmed from the start Ws of the web W is less than 20 m, "△" is when the maximum distance is 20 to 40 m, and the maximum distance is 40 m. The case where it exceeds is marked as "x". According to this, it was found that the occurrence of step marks can be suppressed by covering the starting end Ws of the web W with the single-sided adhesive tape 3.

As for the evaluation of the air pool, the work of fixing the starting end Ws of the web W of the take-up roll body of Examples 1 and 2 was performed 5 times, and the number of times the air pool Ab was generated was confirmed out of the 5 times. “○” indicates that no air pool Ab has occurred in all 5 times, “△” indicates that air biting occurs in 1 to 3 times, and “×” indicates that air biting occurs in 4 to 5 times. did. According to this, it was found that the air accumulation can be prevented by providing the groove 31 in the single-sided adhesive tape 3 as in the second embodiment.

The present invention is not limited to the above embodiments and examples. In the second embodiment, the single-sided adhesive tape 3 provided with the groove 31 is used, but the single-sided adhesive tape 3 having a through hole formed in advance may be used, or after the single-sided adhesive tape 3 is provided, one side is used. A through hole may be formed in the portion of the adhesive tape 3 where air biting occurs by using a needle or the like.

RB ... winding roll body, W ... web, Wa ... outer surface of web W, Ws ... starting end of web W, Wsr ... starting region of web W, 1 ... winding core, 1a ... peripheral surface of winding 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 the method of fixing the web for fixing the starting end area of the web to the core when winding the strip-shaped web around the tubular core in a roll shape,
The process of applying the first tape to the peripheral surface of the winding core over the entire width direction, and
The process of attaching the starting end area of the web to the outer surface of the first tape via the adhesive layer,
A method for fixing a web, which comprises a step of providing a second tape over the entire width direction of the web so as to cover the start end of the web and straddle the outer surface of the web and the peripheral surface of the winding core. In the method of winding the web for winding the strip-shaped web around the tubular core in a roll shape,
The first tape is attached to the peripheral surface of the winding core over the entire width direction , the beginning region of the web is attached to the outer surface of the first tape via the adhesive layer, and then the starting end of the web is covered and the web is covered. A process of providing a second tape over the entire width direction of the web so as to straddle the outer surface of the web and the peripheral surface of the winding core.
A method for winding a web, which comprises a step of rotating the winding core and winding the web on the peripheral surface of the winding core in a roll shape. In a winding roll body including a tubular winding core and a strip-shaped web wound around the winding core in a roll shape.
A double-sided adhesive tape that is attached to the peripheral surface of the winding core over the entire width direction and the starting area of the web is attached.
It is characterized by being provided with a single-sided adhesive tape that covers the starting end of the web attached to the double-sided adhesive tape and is crimped over the entire width direction of the web so as to straddle the outer surface of the web and the peripheral surface of the winding core. Winding roll body to be wound.

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