JPH073213A - Method for sticking felt material - Google Patents

Abstract

PURPOSE:To stick a felt material on an adherend without the fear of air or workplace pollution due to solvent and without needing temporal tacking until developing adhesiveness. CONSTITUTION:The objective method is such that a felt material is stuck on an adherend through such a double-sided adhesive tape that one side of a base has been provided with a hot-melt tacky agent layer A and the other side with a pressure-sensitive tacky agent layer B. Specifically, the felt material is put to hot contact bonding and stuck on the layer A and the layer B is then stuck on the adherend.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a felt material used for automobile interiors for the purpose of soundproofing and heat insulation.

[0002]

2. Description of the Related Art Since a felt material has a rough surface, it has been conventionally sprayed or brushed with an emulsion type adhesive such as vinyl acetate emulsion or a solution type adhesive such as vinyl acetate resin or acrylic resin. It is applied to the felt material and attached to the adherend.

Further, when the felt material is adhered by using a double-sided adhesive tape, the felt material surface can only be point-adhered due to the fluffing of the fiber, and the interlayer strength of the felt itself is weak, so that the felt material is easily peeled off. Therefore, most of the double-sided pressure-sensitive adhesive tape is used for temporarily fixing and placing the adherend until the curing and drying of the adhesive are completed.

However, since the solution type adhesive contains a solvent, there is a possibility that the working environment may be polluted or the atmosphere may be polluted by the evaporation of the solvent. In addition, it takes time for a solution type adhesive or emulsion type adhesive to develop adhesive strength, and it is necessary to temporarily fix the adherend with adhesive tape during this time, so it is difficult to use it in a continuous production line. There was a problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to develop an adhesive property without fear of working environment or air pollution by a solvent. An object of the present invention is to provide a method for sticking a felt material to an adherend with only a double-sided adhesive tape without the need for temporary fixing.

[0006]

According to the method for sticking felt material of the present invention, a hot melt adhesive layer (A) is formed on one surface of an impermeable substrate and a pressure sensitive adhesive layer (B) is formed on the other surface. ) Is formed on the hot-melt pressure-sensitive adhesive layer (A) by applying the felt material to the adherend with a double-sided pressure-sensitive adhesive tape on which the pressure-sensitive adhesive layer (B) is attached. ) Is adhered to an adherend.

The above-mentioned substrate is not particularly limited as long as it does not pass through the pressure-sensitive adhesive laminated on both sides and has stretchability. For example, a laminate of a polyethylene terephthalate film and a polyethylene woven fabric or the like is used. Used.

Examples of the pressure-sensitive adhesive used in the hot melt pressure-sensitive adhesive layer (A) include styrene-isoprene-styrene block copolymer (represented by S-I-S), styrene-ethylene / propylene-styrene block. Copolymer (represented by S-E / P-S), styrene-butadiene-styrene block copolymer (represented by S-B-S), styrene-ethylene / butylene-styrene block copolymer ( S / E / B-S) is used as a base polymer.

The above adhesive contains the above base polymer,
If necessary, a tackifier, a softening agent, an antioxidant, etc. may be added.

The tackifier may be a coumarone resin, a petroleum resin, a terpene resin, a rosin resin, a phenol resin, a xylene resin, etc., which may be used alone or in combination with each other. it can.

As the softening agent, olefin oligomers, paraffinic oils, naphthenic oils, vegetable oils, etc. may be used alone or in combination with each other with good compatibility.

As the above-mentioned antioxidant, pentaerythritol-tetrakis [3- (3,5-di-t-butyl-
4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], pentaerythritol-
Tetrakis [β-lauryl-thiopropionate), tris (2,4-di-t-butylphenyl) phosphite, 2-t-butyl-6- (3-t-butyl-2-hydroxy-5-methyl Benzyl) -4-methylphenyl acrylate and the like are used alone or in combination.

The pressure-sensitive adhesive used in the hot-melt pressure-sensitive adhesive layer (A) is prepared by mixing an appropriate amount of the above-mentioned various compounding agents, and then mixing this with a roll, a Banbury mixer, a kneader, a kneading extruder or the like at 100 to 200 ° C. It is obtained by melt-kneading at a temperature.

The pressure-sensitive adhesive used in the pressure-sensitive pressure-sensitive adhesive layer (B) is not particularly limited and may be, for example,
Acrylic resin, rubber resin such as natural rubber and synthetic rubber,
Examples of the pressure sensitive adhesive include a vinyl ether resin as a base polymer.

The double-sided pressure-sensitive adhesive tape is used as a wound body in which double-sided release paper is inserted on the hot melt pressure-sensitive adhesive layer (A) and the pressure-sensitive pressure-sensitive adhesive layer (B).

In the sticking method of the present invention, the hot-melt pressure-sensitive adhesive layer (A) is heated, a felt material is pressure-bonded to the pressure-sensitive adhesive layer (A), and then the pressure-sensitive pressure-sensitive adhesive layer (B). By sticking to the adherend, the felt material can be stuck to the intended adherend.

[0017]

EXAMPLES Examples of the present invention will be described below. (Example 1) A hot-melt pressure-sensitive adhesive containing a laminate of a polyethylene terephthalate film and a polyethylene woven fabric (140 μm thick) as a base material, and a styrene-isoprene-styrene block copolymer as a main component on one surface of the base material. (Melt viscosity at 130 ° C. 50,000 cps) was applied to form a 200 μm thick hot melt adhesive layer, and a 60 μm thick acrylic adhesive layer was formed on the other surface 50 mm
A double-sided adhesive tape having a width was prepared.

[Performance evaluation of double-sided adhesive tape] The following double-sided adhesive tape was evaluated for performance, and the results are shown in Table 1. (1) Normal Adhesion Strength Measured by a 180 degree peeling method according to JIS Z1528. (2) Normal-state holding power The normal-temperature holding power was measured according to JIS Z1528.

(3) Shear creep 50 m of felt material having a thickness of 5 mm and a basis weight of 250 g / m ²
The above-mentioned double-sided adhesive tape cut to a length of 5 mm was placed with one end of the felt piece cut into m × 100 mm size in the longitudinal direction with the hot melt adhesive layer on the lower side, and the felt piece was ironed at 100 ° C. for 2 It was pressed for 2 seconds and attached to the felt piece. Then, the pressure-sensitive adhesive layer of the double-sided pressure-sensitive adhesive tape adhered onto the felt piece was placed on the stainless steel plate of 50 mm × 150 mm so that the felt piece and the stainless steel plate were overlapped in the longitudinal direction, and 2 kg of A test piece was prepared by reciprocating the roller once and pressing and adhering. A load of 100 g was applied to the other end of the felt piece of the test piece to hold it vertically, and the time until the load dropped in an atmosphere of 40 ° C. was measured.

(4) 180 ° Peeling Creep In the same manner as in (3), a hot-melt adhesive layer of a double-sided adhesive tape was attached to the felt piece, and a pressure-sensitive adhesive layer was formed to 50 m.
A test piece was prepared by placing a felt piece and a stainless steel plate on a stainless steel plate of m × 150 mm so that the felt piece and the stainless steel plate overlap each other in the longitudinal direction, and pressing and adhering the 2 kg roller once reciprocatingly. 1 felt piece of the above test piece
The test piece was folded back at 80 degrees, and a load of 100 g was applied to the folded end portion to hold it vertically, and the time until the load dropped in an atmosphere of 40 ° C. was measured.

Comparative Example 1 As a double-sided adhesive tape, a double-sided adhesive tape in which an acrylic pressure-sensitive adhesive layer was formed on both sides of a base material (“Double Tack Tape # 57” manufactured by Sekisui Chemical Co., Ltd.).
82 ”) and in the same manner as in Example 1 above (1)
Performance evaluations of (4) to (4) were performed, and the results are shown in Table 1.

Comparative Example 2 A vinyl acetate emulsion was used instead of the double-sided adhesive tape (“Esdyne # 53” manufactured by Sekisui Chemical Co., Ltd.
Test piece was prepared in the same manner as in Example 1 except that "00") was used, and the performance evaluations of the above (3) and (4) were performed, and the results are shown in Table 1. The coating amount of the vinyl acetate emulsion was 100 g / m ² , and the coating was air-dried for 5 minutes after application.

[0023]

[Table 1]

[0024]

Industrial Applicability The felt material sticking method of the present invention is as described above, and there is no fear of working environment or air pollution due to the solvent, and the felt material does not require temporary fixing until the adhesiveness is exhibited. Since the material can be attached to the adherend, it can be used in a continuous production line.

Claims (1)

[Claims] 1. A hot-melt pressure-sensitive adhesive layer (A) on one surface of a substrate.
And a pressure-sensitive adhesive layer (B) is formed on the other surface of the felt material by a double-sided adhesive tape. The felt material is a hot-melt adhesive layer (A).
A method for sticking a felt material, which comprises sticking the adhesive layer (B) onto an adherend by thermocompression bonding onto the sticker.