JP6359151B1 - Web material winding method - Google Patents

Abstract

When a web material is rewound from a core, the core can be reused without any adhesive tape remaining on the surface of the core, and the double-sided adhesive tape is applied to the core. Provided is a method for winding a web material, in which a double-sided adhesive tape is easily attached to a winding core. A web material winding method according to the present invention includes a step of attaching a strip-shaped smooth tape 20 extending along the axial direction to an outer peripheral surface of a resin core 10, and a shaft on a surface of the smooth tape. A step of applying a belt-like double-sided pressure-sensitive adhesive tape 30 extending in the direction, a step of attaching an end of the web material 40 to the double-sided pressure-sensitive adhesive tape, and a step of winding the web material around a winding core. The surface roughness is smaller than the surface roughness of the core. [Selection] Figure 1

Description

  The present invention relates to a web material winding method for winding a web material around a core.

  In order to wind up a web material such as a film or a sheet in a roll shape, a method is generally used in which the tip of the web material is fixed to the outer peripheral surface of a cylindrical winding core with a double-sided adhesive tape, and then the winding core is rotated and wound. It has been.

  In Patent Document 1, as a double-sided adhesive tape that fixes the front end of a web material to a core, a double-sided adhesive in which the side to be attached to the core is formed with a strong adhesive layer and the side to be attached to the web material is formed with a weak adhesive layer. A tape is disclosed. Thereby, when pulling out the web material wound up by the core from the core, the web material can be smoothly detached from the core. Moreover, since the double-sided pressure-sensitive adhesive tape remains on the core side due to the strong pressure-sensitive adhesive layer, it can be prevented from being transferred to the next step with the pressure-sensitive adhesive layer attached to the web material.

JP 2001-163490 A

  When the web material wound around the core is rewound, if the adhesive of the adhesive tape that has fixed the web material remains on the surface of the core, the surface of the core is reused in advance. It is necessary to peel off the remaining adhesive with chemicals.

  In order not to leave the adhesive of the adhesive tape on the surface of the core when the web material is rewound from the core, as the double-sided adhesive tape, the side to be attached to the core is formed with a weak adhesive layer, and the web It is conceivable to form the side to be attached to the material with a strong adhesive layer.

  However, when the web material is wound around the core and stored for a long time at a high temperature, the double-sided pressure-sensitive adhesive tape is in a state where a strong compression pressure is applied to the double-sided adhesive tape through the web material. For this reason, the adhesive strength of the pressure-sensitive adhesive tape on the core side is increased by several times as much as the initial adhesive strength (weak viscosity) when the web material is attached to the core, and is made stronger. As a result, when the web material is stored on the winding core for a long period of time at a high temperature and then unwound from the winding core, the adhesive tape remains on the surface of the winding core.

  Double-sided adhesive tape, this time, if the adhesive strength of the adhesive tape on the core side is made weaker so that the adhesive tape adhesive does not remain on the surface of the core even after long-term storage at high temperature When sticking to a core, the problem that a double-sided adhesive tape becomes difficult to stick arises.

  The present invention has been made in view of such points, and its main purpose is to reuse the core without leaving the adhesive of the adhesive tape on the surface of the core when the web material is rewound from the core. It is possible to provide a method for winding a web material that can be easily attached to a core when the double-sided adhesive tape is attached to a core.

The web material winding method according to the present invention includes a step of attaching a strip-shaped smooth tape extending along the axial direction to the outer peripheral surface of the core, and a strip-shaped both surfaces extending along the axial direction on the surface of the smooth tape. The smooth tape comprises a step of attaching an adhesive tape, a step of attaching an end of a web material to a double-sided adhesive tape, and a step of winding the web material around a core, and the smooth tape has a thickness of 10 μm or less. ) Made of resin, and the surface roughness of the smooth tape is smaller than the surface roughness of the core, and the double-sided adhesive tape is characterized in that the adhesive force on the smooth tape side is smaller than the adhesive force on the web material side. To do.

  According to the web material winding method of the present invention, when the web material is rewound from the core, the core can be reused without leaving the adhesive of the adhesive tape on the surface of the core. Moreover, when sticking a double-sided adhesive tape on a core, it becomes easy to stick a double-sided adhesive tape on a core.

(A)-(d) is the enlarged view which showed typically the winding method of the web material in one Embodiment of this invention. It is the enlarged view which showed the state when the web material was rewound from the core. (A)-(c) is the enlarged view which showed the method of affixing on the outer peripheral surface of a thin smooth tape core.

  Before describing the embodiments of the present invention, the background to the idea of the present invention will be described.

  The inventor of the present application weakens the pressure-sensitive adhesive layer on the core side so that the pressure-sensitive adhesive tape remains on the surface of the core when the web material is rewound from the core. A double-sided pressure-sensitive adhesive tape with a strengthened layer was applied to the core, and the end of the web material was applied to this double-sided adhesive tape, and a method of winding the web material around the core was being studied. When the web material was rewound after being stored for a long time at a high temperature in a state of being wound up, the adhesive tape adhesive remained on the surface of the core. This is considered due to the following reasons.

  That is, since the web material is wound around the core while applying tension to the web material, a strong compressive stress is applied to the web material in a state of being wound around the core. Therefore, when the web material is wound around the core and stored for a long time at a high temperature, the double-sided pressure-sensitive adhesive tape is in a state where a strong compression pressure is applied to the double-sided adhesive tape through the web material. As a result, the adhesive strength of the pressure-sensitive adhesive layer on the core side is about several times greater than the initial adhesive strength (weak viscosity) when the web material is attached to the core, and is made stronger. Therefore, it is considered that when the web material is stored on the core for a long time at a high temperature and then unwound from the core, the adhesive of the adhesive tape remains on the surface of the core.

  Therefore, the inventor of the present application based on the above knowledge, in order to prevent the adhesive of the adhesive tape from remaining on the surface of the core even after being stored for a long time at a high temperature, the adhesive strength of the adhesive layer on the core side When a weaker material was used, this time, when the double-sided pressure-sensitive adhesive tape was affixed to the core, there was a problem that the double-sided pressure-sensitive adhesive tape became difficult to stick. And when this inventor weakened the adhesive force of the adhesive layer by the side of a core, it noticed that the sticking condition of a double-sided adhesive tape had a difference with the kind of core. That is, it was found that the double-sided adhesive tape is difficult to attach with a resin core (plastic core), whereas the double-sided adhesive tape is easy to attach with a metal core (metal core).

  In general, a resin core has a lower smoothness on the surface of the core than a metal core. The inventor of the present application pays attention to this point, and when the adhesive strength of the adhesive layer on the core side is weakened, the difference in the degree of adhesion of the double-sided adhesive tape is due to the difference in smoothness of the core surface. I thought it was. That is, when the smoothness of the core surface is high, it is thought that even if the adhesive force of the adhesive layer on the core side is weak, the contact area between the core and the adhesive layer is large, so that the double-sided adhesive tape was easy to apply. . On the other hand, when the smoothness of the surface of the core is low, the contact area between the core and the adhesive layer is small, so it is considered that the double-sided adhesive tape was difficult to attach.

  However, the metal core is heavier and more expensive than the resin core. Therefore, the inventor of the present application previously pastes a tape (hereinafter referred to as “smooth tape”) having the same degree of smoothness as the metal core surface at the position where the double-sided adhesive tape is pasted on the surface of the resin core. Thus, even when the adhesive strength of the pressure-sensitive adhesive layer on the core side is weakened, it is considered that the double-sided pressure-sensitive adhesive tape can be easily attached, and the present invention has been conceived.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment. Moreover, it can change suitably in the range which does not deviate from the range which has the effect of this invention.

  1A to 1D are enlarged views schematically showing a web material winding method according to an embodiment of the present invention.

  First, as shown in FIG. 1A, a belt-like smooth tape 20 extending along the axial direction (vertical direction in the drawing) is attached to the outer peripheral surface of the resin core 10. As the smooth tape 20, for example, a film made of a material such as polyethylene terephthalate (PET) resin, polystyrene resin, acrylic resin, or polycarbonate resin can be used.

  Next, as shown in FIG. 1 (b), a belt-like double-sided adhesive tape 30 extending along the axial direction is attached to the surface of the smooth tape 20. Here, the double-sided adhesive tape 30 has a configuration in which an adhesive layer is formed on both surfaces of a base material (not shown), and the adhesive force of the adhesive layer on the smooth tape 20 side is opposite to the smooth tape 20 (a web to be described later). It is smaller than the adhesive force of the adhesive layer on the material 40 side.

  Next, as shown in FIG. 1C, the end portion of the web material 40 is attached to the double-sided pressure-sensitive adhesive tape 30. Note that the end portion of the web member 40 may protrude from the smooth tape 20 as shown in FIG.

  Finally, as shown in FIG. 1 (d), the web material 40 is wound around the core 10.

  In the present embodiment, the surface roughness (Sa) of the smooth tape 20 is smaller than the surface roughness (Sa) of the core 10. Here, the surface roughness (Sa) is an arithmetic average roughness of the degree of surface irregularities measured using a roughness profile measuring machine (VR-3000 manufactured by Keyence Corporation) in accordance with the provisions of ISO25178.

  According to this embodiment, the surface roughness (Sa) of the smooth tape 20 is smaller than the surface roughness (Sa) of the core 10, that is, the smoothness of the smooth tape 20 is greater than the smoothness of the core surface. high. Therefore, when the double-sided adhesive tape 30 is attached to the surface of the smooth tape 20, the double-sided adhesive tape 30 can be easily attached to the surface of the smooth tape 20 even if the adhesive force of the adhesive layer on the smooth tape 20 side is small. it can.

  Since the adhesive force of the adhesive layer on the core 10 side (smooth tape 20 side) can be reduced by sticking such a smooth tape 20 to the surface of the core 10, the web material 40 is wound around the core 10. Even when stored for a long time at a high temperature, the adhesive strength of the adhesive layer on the core 10 side does not become so strong. As a result, as shown in FIG. 2, when the web material 40 is rewound from the core, the double-sided adhesive tape 30 is detached from the smooth tape 20 in a state of being adhered to the web material 40 on the strong-viscosity side. It does not remain on the surface of the smooth tape 20 (core 10). Therefore, the core 10 can be reused in a state where the smooth tape 20 is attached to the outer peripheral surface of the core 10. In addition, when reusing, after attaching the double-sided adhesive tape 30 to the smooth tape 20 already attached to the outer peripheral surface of the core 10, the end of the web material 40 can be attached to the double-sided adhesive tape 30. That's fine.

  In this embodiment, if the surface roughness (Sa) of the smooth tape 20 is smaller than the surface roughness (Sa) of the core 10, the effect of the present invention can be obtained, but typically the surface of the smooth tape 20. The roughness (Sa) is preferably in the range of 0.2 to 0.4 μm. The surface roughness (Sa) of the core 10 is preferably larger than 0.4 μm.

  Further, the adhesive force of the adhesive layer on the core 10 side (smooth tape 20 side) is such that the web material 40 can be removed from the core even if the web material 40 is wound around the core 10 and stored for a long time at a high temperature. What is necessary is just to be weak so that an adhesive tape does not remain on the surface of the core when rewinding. The adhesive strength of the pressure-sensitive adhesive layer on the core 10 side depends on the surface roughness (Sa) of the smooth tape 20, but typically the adhesive strength of the pressure-sensitive adhesive layer on the core 10 side (conforms to JIS Z0237; 180 degree peeling; peeling speed: 300 mm / min; adherend: stainless steel substrate) is preferably in the range of 0.3 to 3 N / 20 mm.

  By the way, when the smooth tape 20 is affixed to the outer peripheral surface of the core 10, a level difference is generated in the thickness of the smooth tape 20 between the outer peripheral surface of the core 10 and the end of the smooth tape 20. If the smooth tape 20 is thick, the web material 40 wound on the step may be deformed such as wrinkles. Therefore, in order to prevent such deformation, the thickness of the smooth tape 20 is preferably as thin as possible, and desirably 10 μm or less. Similarly, the thickness of the double-sided pressure-sensitive adhesive tape 30 to be attached to the smooth tape 20 is preferably as thin as possible, and desirably 10 μm or less. The width of the double-sided pressure-sensitive adhesive tape 30 is preferably narrower than the width of the smooth tape 20.

  On the other hand, when the thickness of the smooth tape 20 is, for example, 10 μm or less, the smooth tape 20 itself is not self-supporting, and thus the work of attaching the smooth tape 20 to the outer peripheral surface of the core 10 becomes difficult.

  3A to 3C are enlarged views showing a method of attaching such a thin smooth tape 20 to the outer peripheral surface of the core 10.

  First, as shown in FIG. 3A, a laminated sheet in which a support sheet 23, a first adhesive layer 22, a smooth tape 20, and a second adhesive layer 21 are laminated is prepared. Here, the smooth tape 20 is made of, for example, a PET film having a thickness of 10 μm or less. Further, as the support sheet 23, for example, a resin sheet such as PET, PC (polycarbonate), PP (polypropylene) acrylic having a thickness of 25 μm or more can be used. Further, the adhesive strength of the first adhesive layer 22 is smaller than the adhesive strength of the second adhesive layer 21.

  Next, as shown in FIG. 3B, the surface of the laminated sheet where the second adhesive layer 21 is exposed is attached to the outer peripheral surface of the core 10.

  Next, the support sheet 23 is peeled from the smooth tape 20 as shown in FIG. Thereby, the thin smooth tape 20 can be affixed on the outer peripheral surface of the core 10.

  According to said method, since the smooth tape 20 can be affixed on the outer peripheral surface of the core 10 in the state supported by the support sheet 23, even if the smooth tape 20 is thin, affixing of the smooth tape 20 is possible. Can be easily performed.

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Hereinafter, although the example and the example of the present invention are given and the composition and effect of the present invention are further explained, the present invention is not limited to these examples.

Example 1
Prepare a core 10 made of ABS (acrylonitrile-butadiene-styrene copolymer) resin (manufactured by Showa Maru) with an inner diameter of 3 inches (outside diameter of about 88 mm), and apply a smooth tape 20 to the outer peripheral surface of the core 10 I attached. The smooth tape 20 used in this example was a tape made of PET resin having a thickness of 2 μm. Furthermore, a double-sided pressure-sensitive adhesive tape 30 (total thickness: 10 μm or less) was attached to the surface of the smooth tape 20.

  The winding core 10 is attached to a winding device, and a PET film (web material 40) having a thickness of 75 μm is attached to the double-sided pressure-sensitive adhesive tape 30, and then wound at a winding tension of 66 N and a winding speed of 150 m / min. I took it. Then, when winding the PET film, it was visually confirmed whether or not the double-sided pressure-sensitive adhesive tape 30 was displaced from the surface of the smooth tape 20. Further, when the wound PET film is left at 60 ° C. for 48 hours and then rewound, it is visually checked whether the adhesive layer of the double-sided adhesive tape 30 remains on the surface of the smooth tape 20. Confirmed with. In addition, the core 10 used in the present embodiment is made of an extruded product.

(Comparative Example 1)
When the PET film having a thickness of 75 μm is wound around the core 10 in the same manner as in Example 1 except that the smooth tape 20 is not attached to the outer peripheral surface of the core 10, the double-sided adhesive tape 30 is It is visually confirmed whether or not a deviation from the surface of the core 10 has occurred, and whether or not the adhesive layer of the double-sided adhesive tape 30 remains on the surface of the core 10 when unwound. confirmed.

(Example 2)
The same method as in Example 1 except that the core 10 made of a fiber reinforced resin (FRP) resin (manufactured by Kurimoto Steel Works: Kurika FRP core (registered trademark)) having an inner diameter of 3 inches (outside diameter of about 88 mm) When the PET film having a thickness of 75 μm is wound around the core 10, the double-sided pressure-sensitive adhesive tape 30 visually confirms whether or not a deviation from the surface of the smooth tape 20 has occurred, and is rewound. In addition, it was visually confirmed whether or not the adhesive layer of the double-sided adhesive tape 30 remained on the surface of the smooth tape 20. In addition, the core 10 used in the present embodiment is made of an extruded product.

(Comparative Example 2)
When the PET film having a thickness of 75 μm was wound around the core 10 in the same manner as in Example 2 except that the smooth tape 20 was not attached to the outer peripheral surface of the core 10, the double-sided adhesive tape 30 was It is visually confirmed whether or not a deviation from the surface of the core 10 has occurred, and whether or not the adhesive layer of the double-sided adhesive tape 30 remains on the surface of the core 10 when unwound. confirmed.

(Reference example)
When a PET film having a thickness of 75 μm was wound around the core 10 in the same manner as in Comparative Example 1, except that an iron core (iron core) 10 having an inner diameter of 3 inches (outer diameter of about 88 mm) was used. The double-sided pressure-sensitive adhesive tape 30 visually confirms whether or not a deviation from the surface of the core 10 has occurred, and the adhesive layer of the double-sided pressure-sensitive adhesive tape 30 remains on the surface of the core 10 when unwound. It was confirmed visually.

  Table 1 is a table showing the results of evaluating the presence or absence of displacement of the adhesive tape and the presence or absence of the remaining adhesive layer in Examples 1 and 2, Comparative Examples 1 and 2, and Reference Example. Table 1 also shows the measurement results of the surface roughness (Sa) of the smooth tape 20 and the surface roughness (Sa) of the core 10.

  As shown in Table 1, in Examples 1 and 2 in which the smooth tape 20 was attached to the core 10 and the PET film was wound up, no deviation of the double-sided adhesive tape 30 when the PET film was wound up was observed. . Moreover, the remainder of the adhesion layer when the PET film was rewound was not observed.

  As shown in Table 1, since the surface roughness (Sa) of the smooth tape 20 was smaller than the surface roughness (Sa) of the winding core 10, in Examples 1 and 2, the surface of the winding core 10 side. It is considered that even if the adhesive force of the adhesive layer is weak, the contact area between the core 10 and the adhesive layer is large, so that the double-sided adhesive tape was easy to stick. Moreover, since the adhesive force of the pressure-sensitive adhesive layer on the core 10 side can be reduced by applying the smooth tape 20 to the surface of the core 10, the web material 40 is wound around the core 10 for a long time at a high temperature. Even when stored, the adhesive strength of the adhesive layer does not increase so much, and as a result, the adhesive layer of the double-sided adhesive tape 30 does not remain on the surface of the smooth tape 20.

  On the other hand, in Comparative Examples 1 and 2 in which a double-sided pressure-sensitive adhesive tape was directly attached to the surface of the core 10 and the PET film was wound up, when the PET film was wound up, a shift of the double-sided pressure-sensitive adhesive tape 30 was observed. . This is probably because the surface roughness (Sa) of the core 10 was large, so that the contact area between the core 10 and the adhesive layer was small, and as a result, it was difficult to attach the double-sided adhesive tape.

  In Comparative Examples 1 and 2, since the deviation of the double-sided adhesive tape 30 was observed, the remainder of the adhesive layer when the PET film was rewound was not evaluated.

  In the reference example, although the PET film was wound directly on the surface of the core 10 via the double-sided adhesive tape, the shift of the double-sided adhesive tape 30 when the PET film was wound up was also caused by the PET film. The rest of the adhesive layer was not observed when rewound. This is because the core 10 made of iron (metal) is used, the surface roughness (Sa) of the core 10 is small, and as a result, Examples 1 and 2 in which the smooth tape 30 is attached to the core 10; It is thought that the same effect was demonstrated.

  As mentioned above, although this invention was demonstrated by suitable embodiment, such description is not a limitation matter and of course various modifications are possible. For example, in the above embodiment, after the double-sided pressure-sensitive adhesive tape 30 is attached to the smooth tape 20, the web material 40 is fixed with the double-sided pressure-sensitive adhesive tape. 40 may be attached to the smooth tape 20. That is, the step of attaching the double-sided pressure-sensitive adhesive tape 30 to the surface of the smooth tape 20 and the step of attaching the end of the web material 40 to the double-sided pressure-sensitive adhesive tape 30 may be performed simultaneously.

  Moreover, in the said Example, although the example of the core which consists of ABS resin and FRP resin was shown as the core 10, if it is a resinous core, the material will not be specifically limited. For example, in addition to ABS resin and FRP resin, a core made of polyethylene (PE) resin, polystyrene (PS) resin, or the like can be used.

10 core
20 Smooth tape
21 Second adhesive layer
22 First adhesive layer
23 Support sheet
30 Double-sided adhesive tape
40 Web material

Claims (4)

A step of attaching a strip-shaped smooth tape extending along the axial direction to the outer peripheral surface of the resin winding core;
A step of attaching a belt-like double-sided adhesive tape extending along the axial direction to the surface of the smooth tape;
A step of attaching an end of a web material to the double-sided adhesive tape;
Winding the web material around the core, and a method for winding the web material,
The smoothing tape thickness consists of the following polyethylene terephthalate (PET) resin 10 [mu] m, and the surface roughness of the smoothing tape, rather smaller than the surface roughness of the winding core,
The double-sided pressure-sensitive adhesive tape is a method for winding a web material , wherein the adhesive force on the smooth tape side is smaller than the adhesive force on the web material side .   The surface roughness (Sa) of the said smooth tape is the method of winding up the web material of Claim 1 which exists in the range of 0.2-0.4 micrometer. 2. The web material according to claim 1 , wherein the core is made of acrylonitrile-butadiene-styrene copolymer (ABS) resin, fiber reinforced resin (FRP), polyethylene (PE) resin, or polystyrene (PS) resin. Winding method. The step of applying the smooth tape includes
A step of preparing a laminated sheet in which a support sheet, a first adhesive layer, the smooth tape, and a second adhesive layer are laminated;
Bonding the surface of the laminated sheet from which the second adhesive layer is exposed to the outer peripheral surface of the core;
Peeling the support sheet from the smooth tape,
The web material winding method according to claim 1, wherein an adhesive force of the first adhesive layer is smaller than an adhesive force of the second adhesive layer.

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