JPH04264181A - Multi-layer self-adhesive material - Google Patents

Abstract

PURPOSE:To provide a mutli-layer self-adhesive material which enables an operation to be performed at a close dimensional accuracy without sticking to the hands of workers by providing a woven or non-woven textile coated with a non-self-adhesive or weakly self-adhesive resin on a resin composition material which hardens, and exhibits adhesiveness when heated or exposed to light. CONSTITUTION:A multi-layer self-adhesive material in which a woven or non- woven textile coated with a non-self-adhesive or weakly self-adhesive resin on one or both sides thereof is provided on a resin composition material which hardens and exhibits adhesiveness when heated or exposed to light. Usable resin composition materials should contain a hardening and self-adhesive resin and exhibit no flowability and deformability at ordinary temperatures. Preferred examples of such resin include thermosetting resins and/or ionizing radiation- setting resins. Examples of the non-self-adhesive or weakly self-adhesive resin include natural rubber, synthetic rubber, thermoplastic resins, thermosetting resins and ionizing radiation-setting resins. The thickness of the coated film formed by this resin is 1mum to 10mm, preferably 10mum to 1mm.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a laminated adhesive material that can be used for sealers, labels, coating materials, etc., and more specifically, the adhesive resin composition of the laminated adhesive material during construction. However, the present invention relates to a laminated adhesive material that does not stick to the hands of workers, can be applied with high dimensional accuracy, and does not cause cracks, wrinkles, etc. on the surface after installation.

0002

BACKGROUND OF THE INVENTION Conventionally, paints, adhesives, sealers, putties, etc. containing thermosetting resins have superior properties compared to those containing thermoplastic resins because they are cured by crosslinking. However, since those containing thermosetting resins are in liquid or paste form, the finish of the applied part is poor, and in particular, it is extremely difficult to apply them to a constant thickness and width.

Therefore, in order to eliminate such drawbacks, adhesive resin compositions containing thermosetting resins or ionizing radiation-curing resins and having no fluidity at room temperature are made into tape or sheet forms. A processed version has been proposed (Jikko Sho 6).
No. 0-4987, Jitko No. 54-45416, Jitko No. 5
1-5488, Utility Model Publication No. 37-21575, etc.). When such adhesive resin compositions in the form of tapes or sheets are applied to the construction site, the adhesive side also sticks to the hands of the worker, making it impossible to apply them smoothly. Usually, a release material, cover material, etc. is laminated on one or both sides of the adhesive resin composition material so that it can be easily handled by hiding the adhesive surface and can be pressed sufficiently to adhere to the construction area. was.

[0004] However, adhesive resin compositions laminated with a release material, a cover material, etc. involve the complicated work of having to remove the release material, etc. after pasting it on the construction area, and also require the removal of the release material, etc. Products that are peeled off and then cured have the disadvantage that impurities such as dust adhere to the adhesive surface, resulting in a poor finish.Additionally, products that are cured and then peeled off have the disadvantage that the adhesive resin composition material is removed during curing. Since the shrinkage rates of the material and the base material are different, wrinkles, cracks, bubbles, etc. occur on the surface, resulting in a poor finish.

[0005] In addition, in order to reduce tackiness and make handling easier, a photoreaction initiator is coated or impregnated on the surface of a tacky resin composition material containing a photocurable resin, and then exposed to light to reduce tackiness. A method has been reported in which only the surface of a resin composition is cured to reduce the adhesive strength of the surface (Japanese Patent Application No. 60-221477). However, in this method, when curing the entire adhesive composition resin material,
Since the pre-photocured surface cannot follow the elasticity of the adhesive resin composition as a whole, there is a drawback that wrinkles, cracks, etc. occur on the surface, resulting in a poor finish.

[0006]

Problems to be Solved by the Invention The present invention eliminates the drawbacks of the conventional adhesive resin compositions and provides release materials and covers.
Even without the use of materials, it does not stick to workers' hands during construction, and there is no need to remove release materials, cover materials, etc., dramatically improving construction efficiency.
The adhesive resin composition material can be reinforced without using materials, and furthermore, impurities such as dust will not adhere to the finished surface of the construction part, wrinkles, cracks, bubbles, etc. will not occur, and the construction part will not be damaged. An object of the present invention is to provide a laminated adhesive material that can be applied to curved surfaces with good dimensional accuracy.

[0007]

[Means for Solving the Problems] The laminated adhesive material of the present invention has a non-adhesive or weakly adhesive resin coated on one or both sides of an adhesive resin composition material that cures and adheres with heat or light. It is characterized by laminated woven or non-woven fabrics.

The present invention will be explained in detail below. The adhesive resin composition material used in the present invention contains a curable and adhesive resin and has no flow deformability at room temperature. As such a resin, a thermosetting resin and/or an ionizing radiation curable resin is preferable.

Examples of the thermosetting resin include epoxy resin, alkyd resin, unsaturated polyester resin, acrylic resin, and urethane resin. Among them, epoxy resins, alkyd resins, acrylic resins, and urethane resins are preferred. The content of the thermosetting resin is 90 to 10 parts by weight, preferably 70 to 30 parts by weight.

Ionizing radiation-curable resins are not particularly limited as long as they are cured by irradiation with ultraviolet light, electron beams, etc., and include, for example, double-terminated acryloyl polybutadiene oligomers, epoxy acrylic oligomers, urethane acrylic oligomers, Urethane (meth)acryloyl oligomer, polyester acrylic oligomer, alkyd acrylic oligomer, silicone acrylic oligomer,
(meth)acrylic monomer trimethylolpropane tri(meth)acrylate, polyethylene glycol di(meth)acrylate, ethylene glycol di(meth)acrylate, 1,6-hexanediol(meth)acrylate Examples include neopentyl glycol di(meth)acrylate, diacryloxetyl phosphate, and the like. Among them, acryloyl polybutadiene oligomers, urethane (meth)acryloyl oligomers, and alkyd acrylic oligomers are preferred. The content of the ionizing radiation-curable resin is 90 to 10 parts by weight, preferably 70 to 30 parts by weight.

[0011] Furthermore, when the adhesive resin composition material contains a thermosetting resin, it is preferable to also contain a thermal reaction initiator.

Examples of the thermal reaction initiator include benzoyl peroxide, di-2-ethylhexyl peroxydicarbonate, and di-3-methoxybutyl peroxydicarbonate.
Examples include carbonate, cyclohexane peroxide, and the like. The blending amount of the thermal reaction initiator is 10% of the thermosetting resin.
0.1 to 10 parts by weight, preferably 0 parts by weight
．． It is 5 to 5 parts by weight.

[0013] The adhesive resin composition may also contain a photoreaction initiator, thermoplastic resin,
Fillers, extenders, antifoaming agents, and other compounding agents may also be included.

[0014] The shape of the adhesive resin composition used in the present invention may be, for example, tape, sheet, tube, block, etc., depending on the application and construction area of the laminated adhesive material of the present invention. It can be formed into any suitable form depending on the form, but tape and sheet forms are particularly preferred. The thickness of the tape-shaped or sheet-shaped adhesive resin composition is 0.1 μm to 50 mm, preferably 10 μm to 5 mm.

The laminated adhesive material of the present invention has a non-adhesive or weakly adhesive resin (hereinafter referred to as
It is a stack of woven or non-woven fabrics coated on one or both sides with non-adhesive resin, etc.

[0016] The woven fabric or non-woven fabric used in the present invention is as follows:
Although there are no particular restrictions, the laminated adhesive material is used in areas where the appearance of the finished product is important, and it is preferable that the surface has no irregularities and is finely textured. The thickness of woven or non-woven fabric is 1 μm
~1 mm, preferably 10 μm ~ 100 μm.

[0017] As the non-adhesive resin etc. to be coated on the woven fabric or non-woven fabric, natural rubber, synthetic rubber, thermoplastic resin, thermosetting resin and/or ionizing radiation curable resin are preferable.

Examples of the synthetic rubber include fluororubber, polysulfide rubber, acrylic rubber, styrene-butadiene rubber, silicone rubber, ethylene-acrylic rubber, and hydrogenated nitrile rubber.

Examples of the thermoplastic resin include polychloroprene, polyisoprene, polyisobutylene, isobutylene-isoprene copolymer, polyacrylonitrile, chlorosulfonated polyethylene, polyvinyl butyral, polyurethane, polyester, and ethylene-propylene copolymer. Examples include polymers, polybutadiene, polyolefins, sulfur-containing polymers, and polyacrylic esters.

As the thermosetting resin and the ionizing radiation curable resin, the same ones as mentioned above can be used. These resins can be selected from a wide range depending on the use of the laminated adhesive material of the present invention, and can be used as a composite material by kneading, melting and mixing, etc. Further, fillers such as pigments such as carbon black, talc, silicic anhydride, fast yellow, and phthalocyanine may be blended. It is sufficient that at least one side of the woven fabric or non-woven fabric is coated with a non-adhesive resin, etc., or the entire surface of the woven fabric or non-woven fabric is coated with a non-adhesive resin, or a part or multiple parts of the surface is coated with a non-adhesive resin. (for example, a non-adhesive resin or the like is provided on the surface of a woven or non-woven fabric in a sea-island relationship).

[0021] The thickness of coating with non-adhesive resin etc. is 1 μm.
~10 mm, preferably 10 μm ~1 mm. The laminated adhesive material of the present invention can be easily obtained, for example, by the manufacturing method shown below.

[0022] After uniformly kneading the above-mentioned components of the adhesive resin composition material by a conventional method, the mixture is molded into a desired shape using an extruder.
A sticky resin composition material is produced. On the other hand, a non-adhesive resin, etc. and, if necessary, the above-mentioned filler are blended and kneaded uniformly, and the mixture is coated on one or both sides of a woven fabric or non-woven fabric by a method such as calendering, laminating, transfer, or direct coating. Cover. Next, a woven or nonwoven fabric coated with a non-adhesive resin or the like is laminated onto one side of the adhesive resin composition.

At this time, conversely, an adhesive resin composition is formed on a woven or nonwoven fabric coated with a non-adhesive resin, for example, by a calendering method or by extrusion molding to form the laminated adhesive of the present invention. material can be produced. The laminated adhesive material thus obtained can be suitably used as a so-called sealer material.

Furthermore, the laminated adhesive material of the present invention can be used as a sheet-like coating material by incorporating a coloring agent into the adhesive resin composition material and/or non-adhesive resin. , by laminating a woven or non-woven fabric coated with a non-adhesive resin, etc. in the form of letters or figures on an adhesive resin composition material, or by printing, etc. on a woven fabric or non-woven fabric coated with a non-adhesive resin, etc. Can be used as a label.

[0025]

[Examples] The present invention will be explained in more detail with reference to Examples below. (Example 1) The following composition was uniformly kneaded and then molded using an extruder to produce a tape-shaped adhesive resin composition with a width of 100 mm and a thickness of 0.5 mm.

Composition Polyacrylic acid ester resin: 100 parts by weight Araldite Y-2613: 80 parts by weight (manufactured by Ciba Geigy) Dicyandiamide: 5 parts by weight (Japanese manufacturer) - Manufactured by Bydo Co., Ltd.) Aerosil No. 300...10 parts by weight (
(manufactured by Nippon Aerosil Co., Ltd.)

On the other hand, ethylene-vinyl acetate copolymer (
Evaflex 460, manufactured by Mitsui DuPont Chemical Co.)
was calender-coated to a thickness of 100 μm.

Next, the coated nonwoven fabric was laminated onto the produced adhesive resin composition so that the back (non-coated side) was in close contact with the adhesive resin composition. As a result of applying the laminated adhesive material obtained in this way to curved surfaces and corners, it was found that the laminated adhesive material has excellent flexibility, so it is easy to apply, and has excellent dimensional accuracy, making it easy to paste. It never moved from its position. Furthermore, even after heating and curing, no cracks or wrinkles were observed in the laminated adhesive material, and even when painted over it, the paint could be applied uniformly.

(Example 2) Chlorinated polyethylene (Elastrene 303A, manufactured by Showa Denko Co., Ltd.) was calender-coated to a thickness of 100 μm on both sides of a nonwoven fabric (FD3520, manufactured by Nippon Vilene Co., Ltd.).

Next, the uniform mixture of the adhesive resin composition of Example 1 was extruded onto the coated nonwoven fabric using an extruder.
A laminated adhesive material with a total thickness of 200 μm was produced. As a result of applying the laminated adhesive material obtained in this way to curved surfaces and corners, it was found that the laminated adhesive material has excellent flexibility, so it is easy to apply, and has excellent dimensional accuracy, making it easy to paste. It never moved from its position. Furthermore, even after heating and curing, no cracks or wrinkles were observed in the laminated adhesive material, and even when painted over it, the paint could be applied uniformly.

(Example 3) Thermosetting polyurethane (N-5037, Japan Polyurethane) was prepared by adding 3% by weight of a hardening agent (Coronate L, Japan Polyurethane Industry Co., Ltd.) to a nonwoven fabric (FD3520, Japan Vilene Co., Ltd.). Polyurethane Kogyo Co., Ltd.) was applied to a thickness of 100 μm and cured at 120° C. for 30 minutes.

Next, the homogeneous mixture of the adhesive resin composition of Example 1 was extruded onto the cured nonwoven fabric using an extruder to produce a laminated adhesive having a total thickness of 200 μm. As a result of applying the laminated adhesive material obtained in this way to curved surfaces and corners, it was found that the laminated adhesive material has excellent flexibility, so it is easy to apply, and has excellent dimensional accuracy, making it easy to paste. It never moved from its position. Furthermore, even after heating and curing, no cracks or wrinkles were observed in the laminated adhesive material, and even when painted over it, the paint could be applied uniformly.

(Example 4) A woven fabric (gauge 250 mesh, manufactured by Matsuno Shigei Co., Ltd.) was immersed in a 30% toluene solution of ethylene-vinyl acetate copolymer (Evaflex 460, manufactured by DuPont Mitsui Chemicals). Thereafter, it was dried at 60° C. for 3 hours to produce a coated woven fabric with a thickness of 100 μm.

Next, the uniform mixture of the adhesive resin composition of Example 1 was extruded onto a coating fabric using an extruder to produce a laminated adhesive having a total thickness of 200 μm. As a result of applying the laminated adhesive material obtained in this way to curved surfaces and corners, it was found that the laminated adhesive material has excellent flexibility, so it is easy to apply, and has excellent dimensional accuracy, making it easy to paste. It never moved from its position. Furthermore, even after heating and curing, no cracks or wrinkles were observed in the laminated adhesive material, and even when painted over it, the paint could be applied uniformly.

(Comparative Example 1) One side of the adhesive resin composition material produced in the same manner as in Example 1 was coated with a T-die to a thickness of 100 μm.
A film of ethylene-vinyl acetate copolymer (Evaflex 460, manufactured by DuPont Mitsui Chemicals) was laminated to produce a laminated adhesive material with non-adhesive properties on one side.

When the product thus obtained was applied to curved surfaces and corners, it was found to be relatively flexible and easy to apply, but the adhesive material stretched during application, and the adhesive material was removed from the pasting position. has shifted. In addition, due to the stress caused by the elongation of the laminated adhesive material,
Wrinkles appeared on the surface during heat curing.

[0037]

[Effects of the Invention] According to the present invention, the following effects can be achieved. (1) Since flexible woven or non-woven fabrics with almost no elongation are laminated, construction can be performed easily and with high dimensional accuracy even if the construction part is a curved surface or corner. (2) There is almost no elongation during construction, and no stress remains on the adhesive adhered to the construction area, so shrinkage does not occur during heating and curing, and the surface smoothness can be maintained.

Claims (3)

[Claims] Claim 1: A laminated adhesive, characterized in that a woven or nonwoven fabric coated on one or both sides with a non-adhesive or weakly adhesive resin is laminated on an adhesive resin composition that cures and adheres with heat or light. Adhesive material. 2. The laminated adhesive material according to claim 1, wherein the adhesive resin composition contains a thermosetting resin and/or an ionizing radiation curable resin. 3. The laminated adhesive material according to claim 1, wherein the non-adhesive or weakly adhesive resin is natural rubber, synthetic rubber, thermoplastic resin, thermosetting resin and/or ionizing radiation-curable resin.