JPH0715750U - Double-sided adhesive tape - Google Patents

Abstract

(57) [Summary] [Purpose] Double-sided adhesive with good tearability that does not change the thickness or shape of the cut part and provides a constant adhesive force to the base material, and does not cause excess or deficiency in the amount of adhesive tape used. Intended to provide tape. [Structure] Cross-linked polyethylene foam sheet 11 as a base material
Acrylic pressure-sensitive adhesive layers 12 and 13 each having a thickness of 100 μm are laminated (foaming ratio 10 times, thickness 1 mm), and release paper 2 is laminated on the pressure-sensitive adhesive layer 13. The double-sided pressure-sensitive adhesive tape 1 is formed with the perforated sheet 11, the pressure-sensitive adhesive layers 12, 13 and the perforation holes 3, 3 penetrating the release paper 2 repeatedly in the longitudinal direction at intervals of 280 mm.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a double-sided pressure-sensitive adhesive tape having a synthetic resin foam sheet as a base material and having adhesive layers on both sides thereof, which is excellent in hand tearability.

[0002]

[Prior art]

 Building interior materials such as decorative boards used for walls and ceilings of shower rooms and clean rooms of buildings are attached to concrete walls and gypsum boards attached to steel frames with an adhesive. This is because the use of nails and bolts deteriorates the appearance of the room and causes rust and dust.

For this reason, the building interior material is attached to the base material using a double-sided adhesive tape instead of the adhesive. For example, JP-A-4-312671 discloses a method for adhering a decorative plate in which a decorative plate is temporarily fixed to a base material with a double-sided adhesive tape having a foam as a base material, and is permanently fixed with a solventless adhesive. ing. The use of double-sided adhesive tape to attach the base to the ground in this way is often done at a construction site such as a building. It is often done by hand cutting excess adhesive tape to increase efficiency.

[0004]

[Problems to be solved by the device]

 As described above, when the double-sided pressure-sensitive adhesive tape using the foam as a base material is cut off by hand, the cut portion extends or the foamed structure is crushed to reduce the thickness, resulting in poor adhesion to the base material at that portion. Moreover, the adhesive tape using a foam having a high expansion ratio is difficult to separate by hand, and the cutting length varies depending on the operator. As a result, the adhesive strength of the interior material to the base material is not stable, and the amount of the double-sided adhesive tape with respect to the amount of the interior material is excessive and insufficient, which causes a problem in the whole construction process.

The present invention solves the above-mentioned problems of the prior art, provides a constant adhesive force to the base material without changing the thickness and shape of the cut portion, and does not cause excess or deficiency in the amount of adhesive tape used. It is an object to provide a double-sided adhesive tape that is easy to cut by hand.

[0006]

[Means for Solving the Problems]

 The double-sided pressure-sensitive adhesive tape of the present invention is a double-sided pressure-sensitive adhesive tape in which a pressure-sensitive adhesive layer is provided on both sides of a foam sheet, and release paper is laminated on at least one side of the pressure-sensitive adhesive layer. Further, a sewing machine hole is provided so as to penetrate the double-sided adhesive tape and the release paper over the width direction.

As the material of the foamed sheet used for the double-sided adhesive tape of the present invention, synthetic resin such as polyethylene, polyurethane, vinyl chloride, ethylene-vinyl acetate copolymer, rubber or the like is used. If the expansion ratio of the foamed sheet is lower than 5 times, it will be too hard and the adhesiveness to the rough surface will deteriorate, and if it exceeds 30 times, the pressure bonding stress at the time of attachment will be absorbed by the foamed sheet and the adhesive layer and the adhesive layer Since a sufficient pressure-bonding force does not act on the body, the adhesive force on rough surfaces is rather reduced. Therefore, the expansion ratio of the foam sheet is preferably in the range of 5 to 30 times.

As the adhesive, commonly used acrylic or rubber adhesives can be used, but acrylic adhesives containing no tackifying resin are preferable from the viewpoint of low temperature adhesiveness.

The release paper is a commonly used one such as kraft paper, high-quality paper, glassine paper, etc., on which polyethylene resin is coated on both sides, and the coated surface is release-treated with silicone resin, polyethylene terephthalate film, etc. The synthetic resin film, etc., of is used.

The double-sided pressure-sensitive adhesive tape of the present invention has a foam sheet as a base material, a pressure-sensitive adhesive layer provided on both sides thereof, and a perforation hole penetrating through the release paper in a linear shape across the width direction. The distance between the sewing holes in the width direction is not particularly limited, but may be any distance that can be easily separated by hand.

The linear sewing holes are provided at appropriate intervals in the longitudinal direction of the double-sided adhesive tape. This space may be regular or irregular, but since the building interior materials are generally 900 mm x 1800 mm and 600 mm x 2400 mm, the spacing is about 300 mm, which is a divisor of this rule. It is preferable to be provided in a special manner.

Any method may be used to form the perforation holes. For example, the needles are laminated on the release paper while rotating a roll in which a large number of linear needles are axially planted at regular intervals in the circumferential direction. Another method is to pass a double-sided adhesive tape.

The double-sided pressure-sensitive adhesive tape of the present invention is attached to an inner material or a base material laminated on a release paper with a predetermined length, and an unnecessary portion is cut off at the position of the perforation with the release paper. After that, the release paper is peeled off and attached to the other adherend.

[0014]

[Action]

 The double-sided adhesive tape of the present invention can be easily separated by hand with the release paper at the position of the sewing machine hole. Since the thickness of the foamed sheet in the separated part does not change, stable adhesive strength can be obtained.

[0015]

【Example】

 Next, an embodiment of the double-sided adhesive tape of the present invention will be described with reference to the drawings. (Example) FIG. 1 is a longitudinal cross-sectional view showing an example of the double-sided adhesive tape of the present invention, 11 is a cross-linked polyethylene foam sheet as a base material (Sekisui Chemical Co., Ltd. product name "Softlon # 1001" foam) (Magnification: 10 times, thickness: 1 mm), both surfaces thereof are subjected to corona discharge treatment so that the surface tension is 40 dyn / cm or more, and acrylic pressure-sensitive adhesive layers 12 and 13 are laminated on the treated surfaces with a thickness of 100 μm, respectively. A release paper 2 is laminated on the adhesive layer 13. The release paper is glassine paper coated with silicone resin on both sides to form a release layer. The double-sided pressure-sensitive adhesive tape having a width of 20 mm and a length of 10 m is wound into a roll.

On the double-sided adhesive tape 1, perforated sheets 11, adhesive layers 12, 13 and perforation holes 3, 3 penetrating the release paper 2 are repeatedly formed at intervals of 280 mm in the longitudinal direction.

Comparative Example A double-sided pressure-sensitive adhesive tape similar to that of the example except that the sewing machine hole was not formed.

The interior materials 4 having a size of 900 mm × 1800 mm (trade name “Asuber” manufactured by Sekisui Chemical Co., Ltd.) were prepared by two workers A and B using the double-sided adhesive tapes of the above-mentioned examples and comparative examples. Then, the surface of the pressure-sensitive adhesive layer 12 on which the release paper 2 was laminated was attached in the form shown in FIG. All the work of separating the release paper and double-sided adhesive tape was done by hand. Table 1 shows the results of examining the workability during sticking work, hand tearability, cross-sectional shape of the end of the separated part, and the sticking area.

[0019]

[Table 1]

As is clear from Table 1, the double-sided pressure-sensitive adhesive tape 1 of the example had good hand-cutting property, the cross-sectional shape of the separated portion did not collapse, and the sticking areas of two workers were the same. . On the other hand, the comparative example can be cut off by hand, but the cross-sectional shape of the cut-off end 1a becomes thin as shown in FIG. 3, or the end 1b is cut off as shown in FIG. It stretched and rose from the interior material 4.

[0021]

[Effect of device]

 The double-sided pressure-sensitive adhesive tape of the present invention has the above-described structure. Since the double-sided pressure-sensitive adhesive tape is provided with perforation holes penetrating the double-sided pressure-sensitive adhesive tape and the release paper at appropriate intervals in the longitudinal direction, the double-sided pressure-sensitive adhesive tape and double-sided adhesive tape The adhesive tape can be easily separated by hand, and the shape of the separated ends does not collapse, resulting in stable adhesive strength.

[0022]

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the double-sided adhesive tape of the present invention.

FIG. 2 is a plan view showing an embodiment of the double-sided adhesive tape of the present invention.

FIG. 3 is a cross-sectional view showing an embodiment of a conventional double-sided pressure-sensitive adhesive tape.

FIG. 4 is a cross-sectional view showing an embodiment of a conventional double-sided adhesive tape.

[Explanation of symbols]

 1: Double-sided adhesive tape 2: Release paper 3: Perforation hole 4: Interior material 11: Foamed sheet 12, 13: Adhesive layer

Claims (1)

[Scope of utility model registration request] 1. A double-sided pressure-sensitive adhesive tape comprising a foamed sheet and pressure-sensitive adhesive layers provided on both sides of the foamed sheet, and release paper laminated on at least one pressure-sensitive adhesive layer surface of the double-sided pressure-sensitive adhesive tape at appropriate intervals in the width direction. A double-sided adhesive tape, characterized in that a perforation hole is formed through the double-sided adhesive tape and the release paper.