JP2003301146A - Ply separation double-coated tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ply separation double-coated tape which is separated at a core layer and the separated surface of which is tack-free. <P>SOLUTION: This ply separation double-coated tape comprises the core layer consisting of at least two layers formed from same or different materials and a pressure-sensitive adhesive layer formed on both sides of the core layer. The core layer has a ply separation interface between the two layers. The separation force between the pressure-sensitive adhesive layer and an adherend is larger than that at the ply separation interface. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided peeling tape, and more particularly, to a double-sided tape having a core layer having an interlayer peeling surface, the double-sided tape having a double-sided tape having a peeling surface. The present invention relates to a double-sided tape in which the peeling force between the pressure-sensitive adhesive layer laminated on and the adherend is larger than the peeling force of the interlayer peeling surface.

[0002]

2. Description of the Related Art As a method for splicing a web (rolled paper) sheet in a conventional automatic splicing device, an adhesive tape or adhesive has been previously applied to the outer surface of the front end portion of the web sheet unwinding while in use. The flying paster method is generally used in which the prepared adhesive sheet provided on the outer surface of the front end of the web sheet is adhered to the web sheet by pressing and adhering the adhesive sheet, and the sheets are joined together by splicing. In addition, the waiting web sheet prepared for splicing is
As shown in FIG. 2, the outermost surface of the unwinding front end portion is fixed to the original roll main body 2 by the sealing tapes 4 attached to a large number of places until the paper is spliced.

This flying paster system detects the running speed of an old web sheet while it is running, and the adhesive tape is preliminarily attached to the outer peripheral surface while the outermost surface of the unwinding front end of the web sheet is fixed to the main roll body with a sealing tape. After accelerating the rotation of the new web in a stopped state, which was applied to one location, with an accelerator to equalize the relative speeds of the new and old webs, the adhesive tape surface of the new web is pressed and bonded to the running old web sheet surface. Then, after the splicing of the old and new web sheets is performed, the remaining paper after the splicing of the running old web sheets is cut and spliced.

In Japanese Unexamined Patent Publication No. 6-80285, a paper web sheet, a synthetic resin web sheet, and a composite web sheet of synthetic resin and other materials are joined.
Disclosed is an automatic web sheet splicing device for splicing and connecting one web sheet in the unwinding state to another web sheet while maintaining the continuous traveling operation without stopping the traveling operation. However, even in such a case, it is usual that the outermost surface of the unwinding front end of the web sheet is fixed to the raw fabric roll main body by the sealing tapes attached to a large number of places.

The mouth-stop tape used in this conventional method is generally in the shape of an H-shape or a polishing-like shape with a constriction, and is stuck from the both ends of the unwinding end of the web sheet at a pitch of about 50 mm in the width direction. Then, the outermost surface of the web sheet is fixed to the original roll body.

[0006]

In the splicing connection of web sheets according to such a conventional method, sealing tapes are attached to a large number of points in order to fix the outermost surface of the unwinding front end of the web sheet to the raw roll body. In the method, wrinkles occur at the leading edge of the web sheet unwinding at the time of attaching the sealing tape, or when the sealing tape is peeled off at the time of joint connection of the web sheet, the web sheet may be broken, etc.
There was an important problem to be solved in a series of work steps in splicing web sheets.

[0007]

According to the present invention, a core layer composed of at least two layers made of the same or different materials and a pressure-sensitive adhesive layer laminated on both sides of the core layer are provided. Provided is a double-sided peeling tape which has a peeling surface between layers of layers and in which the peeling force of the pressure-sensitive adhesive layer to the adherend is larger than the peeling force of the delamination surface.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION According to the delaminated double-sided tape of the present invention, as shown in FIG. 1, the double-sided tape 3 is linearly formed on the innermost end of the web sheet unwinding, along the width direction of the web sheet. Adhere to the web sheet and unwind the web sheet 1
Since it can be fixed to the original roll body 2, it is possible to suppress wrinkles from being generated at the leading edge portion 1 of the unwinding web sheet, and when the web sheets are spliced together, the delaminated double-sided tape 3
By peeling the middle core layer from each other, it is possible to prevent breakage of the web sheet. In FIG. 1, 5 means a splicing tape.

Further, in the double-sided tape, for example, Japanese Patent Publication No. 6-
Usually, the purpose is to obtain a tape that firmly adheres adherends to each other, such as the fiber-reinforced adhesive tape of Japanese Patent No. 24704. Further, as disclosed in Japanese Patent Application Laid-Open No. 9-272850, when a double-sided adhesive tape attached to various adherends such as plastics and metals is peeled off, the double-sided adhesive tape may be cut off during the peeling or sticky. A double-sided adhesive tape in which the agent does not remain on the surface of the adherend, and as disclosed in Japanese Patent Application Laid-Open No. 2001-152111, when it is peeled off again from the adherend smoothly without causing interlayer breakage. There is also a double-sided adhesive tape that can be peeled off. However, conventionally, in the field of double-sided tape, there has not been known a structure in which an interlayer peeling surface is provided on a core layer and the double-sided tape is divided from the interlayer peeling surface when necessary. That is, the delaminated double-sided tape of the present invention has a completely new structure having a delaminated surface in the core layer, and the delaminated double-sided tape is the paper edge of the paper roll that is provided in the automatic paper splicing device. Not only the stop tape for fixing the part to the paper roll,
It has surprisingly been found to be useful as a fixing tape for wallpaper, carpets, posters and the like.

The delaminated double-sided tape of the present invention will be specifically described below. The delaminated double-sided tape of the present invention is composed of a pressure-sensitive adhesive layer laminated on at least both sides of a core layer to be delaminated.

The core layer is formed by laminating at least two layers of non-woven fabric, film, paper, foam and the like. Specifically, film-to-film, film-to-nonwoven fabric, non-woven fabric to non-woven fabric, film-to-foam product, foam-to-foam product, film-to-paper bonding, and the like can be considered. Further, the delaminated surface in the present invention means the bonding interface between the two layers in any case. Further, since peeling occurs on the interlaminar peeling surface, a tack-free peeling surface can be obtained. Further, if necessary, it may have a multilayer structure of three or more layers. As the material forming the core layer, a conventional or known non-woven fabric, various films, paper and foam that are used as the core layer in the art can be used.

Typical examples of non-woven fabrics include non-woven fabrics made of Manila hemp, pulp rayon, acetate fibers, polyester fibers, polyvinyl alcohol fibers, polyamide fibers, polyolefin fibers, and mixtures thereof. Furthermore, a resin or other binder may be impregnated in order to bond the nonwoven fabrics together. The thickness of the nonwoven fabric is preferably about 14 g / m ² to 200 g / m ² .

Typical examples of the film include films made of cellophane, cellulose acetate, polyvinylidene chloride, hard or soft vinyl, nitrile rubber, polypropylene, polyester, polyamide, polyurethane, polyethylene, polyfluoroethylene and the like. The thickness of the film is preferably about 10 μm to 300 μm. The paper when these films and paper are laminated together is not particularly limited and may be a known paper. Paper thickness is 12
It is preferably about 100 μm to 100 μm.

The foam is not particularly limited, and any conventional or known foam can be used. Typical examples are foams such as polypropylene, polyurethane and polyethylene. The thickness of the foam is preferably about 2 mm to 10 mm.

The means for bonding the constituent materials of the core layer is
Any method such as a thermal laminating method or a bonding method using an adhesive which is commonly used or known in the art can be selected. In thermal lamination, a spot fusion method (embossing method) may be adopted. The adhesive used in the bonding method using an adhesive is not particularly limited as long as a predetermined peeling force can be obtained, and can be appropriately selected depending on the constituent material of the core layer used.

The pressure-sensitive adhesive that is laminated on both sides of the core layer obtained above to form the pressure-sensitive adhesive layer is not particularly limited, and a conventional or known pressure-sensitive adhesive can be used in the pressure-sensitive adhesive tape. For example, acrylic-based adhesives containing acrylic acid ester as a main component and additives such as cross-linking agents and tackifying resins, urethane and rubber-based adhesives containing elastomers with tackifying resins and fillers, silicone-based adhesives, etc. Is mentioned.

The method of applying the pressure-sensitive adhesive for forming these pressure-sensitive adhesive layers may be a conventional or known method in the field of pressure-sensitive adhesive tapes, such as solid coating method, part coating method (including streak coating method), dot printing method, and the like. Any method may be used. The thickness of the pressure-sensitive adhesive layer is preferably about 10 μ / Dry to 400 μ / Dry.

One of the features of the double-sided peeling tape of the present invention is that the core layer has a peeling surface, and the peeling force between the adherends of the pressure-sensitive adhesive layer is larger than the peeling force of the peeling surface. There is. This feature allows the double-sided tape to be separated from the delaminated surface when needed. When the peeling force between the adherends of the pressure-sensitive adhesive layer is larger than the peeling force of the interlayer peeling surface, the peeling between the pressure-sensitive adhesive layer and the adherend does not occur when the peeling of the interlayer peeling surface is required. It means that the peeling surface is large enough to cause peeling. Here, the peeling force between the adherends of the pressure-sensitive adhesive layer and the peeling force of the delamination surface can be appropriately set according to the application of the delaminated double-faced tape. Specifically, the peeling force between the adherends of the pressure-sensitive adhesive layer is preferably 1% or more greater than the peeling force of the interlayer peeling surface, and 3%.
More preferably, it is larger than the above. In addition, in this invention, peeling force is the numerical value measured based on the measuring method of JISZ0237. Further, the peeling force between the adherends of the pressure-sensitive adhesive layer in the present invention is appropriately set according to the type of the adherend. For example, if the adherend is fine paper, 500 g /
25mm to 1500g / 25mm, adherend is SU
700g / 25mm to 2000g / 25 for S plate
It is preferably about mm. Substrate is fine paper and S
In the case of a US plate, the peeling force on the delaminated surface is 3 g / 25 mm
It is preferably about 100 g / 25 mm. In addition, as the type of adherend, in addition to fine paper and SUS plate,
Examples thereof include resins such as polyethylene, polypropylene and ABS, building materials such as wood and concrete, corrugated board and cloth.

The delaminated double-sided tape according to the present invention is preferably used mainly as a sealing tape for splicing and connecting web sheets in an automatic paper splicing device. In addition to the mouth-stop tape, if you use the delaminated double-sided tape with the wallpaper, only the wallpaper will delaminate in the core layer without tack, so there is no need to remove the adhesive with a solvent when removing conventional wallpaper. , Overlap construction is possible again, and wallpaper replacement and partial repairs are easy.
Further, when the delaminated double-sided tape according to the present invention is used as a sealing tape, the delaminated surface of the core layer has no tack, and thus the envelope cannot be easily resealed.

[0020]

EXAMPLES The present invention will be specifically described below with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

EXAMPLE An acrylic adhesive (“Liquidine AR-2090” manufactured by Big Technos Co., Ltd.) was coated on release paper (“75S-518T” manufactured by Fujimori Kogyo Co., Ltd.) as a separator, and heated with hot air at 100 ° C. Dry to a thickness of 33 μm to 37
A μm pressure-sensitive adhesive layer (BACK side pressure-sensitive adhesive layer) was formed.

On the pressure-sensitive adhesive layer, a non-woven fabric surface of a film and a core layer made of non-woven fabric ("BT2101" manufactured by Kuraray Co., Ltd.) was attached to produce a first-step pressure-sensitive adhesive sheet.

Further, an acrylic adhesive ("Liquidine AR-2090" manufactured by Big Technos Co., Ltd.) was used as a release paper ("75S-5" manufactured by Fujimori Industry Co., Ltd.).
18T ”) and dried with hot air at 100 ° C. to form a pressure-sensitive adhesive layer (FACE-side pressure-sensitive adhesive layer) having a thickness of 43 μm to 47 μm.

On the pressure-sensitive adhesive layer, the film surface of the pressure-sensitive adhesive sheet in the first step was adhered to produce a double-sided pressure-sensitive adhesive sheet, and the double-sided pressure-sensitive adhesive sheet was appropriately cut into a double-sided tape.

High-quality paper was used as the adherend. Adhere the adhesive layer on the FACE side to one side of the high-quality paper and peel off the release paper. B
One side of different high-quality paper was attached to the ACK side.

After the adhered portion was pressure-bonded with a 2 kg rubber roller, the high-quality paper was peeled off, resulting in peeling between the layers of the core layer, and there was no tack on the peeled surface and no stickiness due to the adhesive. In the double-sided tapes of the above-mentioned examples, the peeling force of the core layer was 200 g / 25 mm, and the peeling force of the pressure-sensitive adhesive layer to the quality paper was 350 g / 25 mm.

Comparative Example An acrylic adhesive (“Liquidine AR-2090” manufactured by Big Technos Co., Ltd.) was coated on a release paper (“75S-518T” manufactured by Fujimori Kogyo Co., Ltd.) as a separator, and heated at 100 ° C. And dried to a thickness of 33 μm to 37
A μm pressure-sensitive adhesive layer was formed.

On the pressure-sensitive adhesive layer, a core layer made of only a non-woven fabric ("Hybon 6615" manufactured by Shinwa Co., Ltd.) was attached to manufacture a first-step pressure-sensitive adhesive sheet.

Further, a release paper ("75-S518" manufactured by Fujimori Kogyo Co., Ltd.) using an acrylic adhesive ("Liquidine AR-2090" manufactured by Big Technos Co., Ltd.) as a separator is used.
T ") and dried with hot air at 100 ° C to a thickness of 4
An adhesive layer having a thickness of 3 μm to 47 μm was formed.

A double-sided pressure-sensitive adhesive sheet was manufactured by laminating a first-step pressure-sensitive adhesive sheet on the pressure-sensitive adhesive layer, and the double-sided pressure-sensitive adhesive sheet was appropriately cut into a double-sided tape.

Next, as shown in FIG. 3, an interlayer peeling double-sided tape was attached to the adherend and then peeled off. Specifically, it carried out as follows. Fine paper was used as the adherend. The FACE surface-side pressure-sensitive adhesive layer is attached to one surface of the high-quality paper, the release paper is peeled off, and one surface of a different high-quality paper is bonded to the BACK surface-side pressure-sensitive adhesive layer.

After the adhered portion was pressure-bonded with a 2 kg rubber roller, the high-quality paper was peeled off. As a result, the adherend broke without peeling between the core layers. In addition, there are some cases where the adhesive layer of the double-sided tape peels off at the interface between the core layer and the adhesive layer is exposed and stickiness occurs due to the adhesive.

[0033]

EFFECTS OF THE INVENTION The delaminated double-faced tape of the present invention has no tack on the peeling surface because it is peeled in the core layer.
It is possible to prevent troubles due to tacking such as sheet breakage at the time of splicing web sheets, and to eliminate wrinkles at the leading edge of the web sheet unwinding when used as a stop tape for an automatic paper splicing device. it can.

[Brief description of drawings]

FIG. 1 is a schematic perspective view and a sectional view showing a usage example of a delaminated double-sided tape of the present invention.

FIG. 2 is a schematic perspective view of a conventional example.

FIG. 3 is a schematic chart showing the steps of attaching and peeling the delaminated double-sided tape of the example.

[Explanation of symbols]

1 Unwinding leading edge of web sheet 2 Original roll body 3 Delamination double-sided tape 4 mouth-stop tape 5 splicing tape

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tomoko Nakaya             623 Fukano, Muromura, Uda-gun, Nara F-term (reference) 4J004 AA10 AA11 AA14 AB01 CA02                       CA03 CA04 CA05 CA06 CB01                       CB02 CB04 CC02 CC03 EA05                       FA08                 4J040 DF001 EF001 EK001 JA09                       JB09 PA23

Claims (4)

[Claims] 1. An adhesive comprising a core layer composed of at least two layers formed of the same or different materials and a pressure-sensitive adhesive layer laminated on both surfaces thereof, wherein the core layer has a peeling surface between the two layers. A delaminated double-sided tape in which the peeling force of the agent layer from the adherend is larger than that of the delaminated surface. 2. The delaminated double-sided tape according to claim 1, wherein one side or both sides of the pressure-sensitive adhesive layer is protected by a separator. 3. The double-sided peeling tape according to claim 1, wherein the peeling force between the pressure-sensitive adhesive layer and the adherend is 1% or more greater than the peeling force of the delamination surface. 4. The delamination double-sided tape is a stopper tape for fixing a paper end portion of a raw paper roll provided in an automatic paper splicing device to the raw paper roll, according to any one of claims 1 to 3. Delaminated double-sided tape described in No. 3.