JPS6047316B2 - hot melt adhesive cloth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a hot-melt adhesive that can be easily heat-fused to fabrics, etc. during sewing work, and can be completely peeled off by washing with water without hardening the texture of the finished sewn product. Regarding cloth.

BACKGROUND ART So-called heat-adhesive fabrics that can be easily bonded to fabrics only by heat press have been developed.

Generally, products with interlining such as collars, glasses, and collars are
In order to make sewing easier and to improve product shape retention, sewing is performed after the outer fabric is laminated and bonded to the interlining.

In this case, in order to join the interlining and the outer material, a method of coating or impregnating the interlining with an adhesive is often adopted due to the advantages of the process. Traditionally known adhesives of this type include thermoplastic resins such as polyethylene and ethylene-vinyl acetate copolymers, or water-soluble adhesives such as starch, sodium alkyl acids, polyvinylpyrrolidone, polyvinyl alcohol, and gum arabic. However, these adhesives have the following drawbacks. That is, in the former method, the resin becomes sticky through hot pressing, etc., and the interlining and outer material are bonded together, but with this method, the texture tends to become hard, and the adhesion is only partial and cannot be completely removed by washing with water. Because it is difficult to lose, the interlining and outer material may partially peel off, and when ironed, they re-fuse, causing wrinkles, and sometimes the adhesive leaches into the outer material, causing other problems. There are defects that seriously impair the appearance of the product. In addition, the latter method has the disadvantage that after applying the adhesive to the interlining and drying it, it must be moistened with water, bonded, and then dried, which is disadvantageous in terms of process and handling. The object of the present invention is to eliminate such drawbacks, and to provide a hot melt adhesive fabric that allows interlining and outer fabric to be dry-heat fused during sewing, and that can be completely removed by washing without hardening the texture. This is what it means. The water-soluble polyurethane resin used in the present invention is composed of a water-soluble polyoxyalkylene glycol and an organic diisocyanate compound, or a water-soluble polyoxyalkylene glycol, an organic diisocyanate compound, and a chain extender, and preferably has an average molecular weight of 7,000 or more. It is a heavy adduct.

Examples of the water-soluble polyoxyalkylene glycol include polyoxyethylene glycol having a molecular weight of 400 to 10,000, and polyoxyethylene oxypropylene glycol copolymer having a molecular weight of 40 to 10,000 and containing 6%5 of polyoxyethylene moieties in the molecule. Examples include combinations and mixtures thereof. Examples of organic diisocyanate compounds include toluylene diisocyanate,
Examples include diphenylmethane isocyanate, xylylene diisocyanate, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, lysine diisocyanate, dicyclohexylmethane diisocyanate, isophorone diisocyanate, and mixtures thereof. Examples of chain extenders include low molecular weight glycols such as ethylene glycol, propylene glycol, diethylene glycol, butylene glycol, and hexamethylene glycol, ethylene diamine, propylene diamine, hexamethylene diamine, piperazine, hydrazine, aminoethyl biperazine, isophorone diamine, and monoethanol. Examples include amines such as amines, water, and mixtures thereof. Such polyurethane resin is produced by a known method, and the terminal end of the molecule is a hydroxyl group, an amino group, or an isocyanate group blocked with an alcohol or an amine. The method of applying the water-soluble polyurethane resin is not particularly limited, and specifically, powder or film of the polyurethane resin may be melted and bonded, or the molten polyurethane resin may be applied by a coating method, a spray method, It may be applied by a dipping method or a dot-like coating method, or furthermore, a solution of the polyurethane or resin may be applied by a coating method, a spray method, a dipping method, or a dot-like coating method, and then dried. The solvent used when applying the polyurethane resin as a solution is generally water, but solvents in which the polyurethane resin is soluble, such as acetone, methanol, ethanol, ethyl acetate, dimethylformamide, etc. can be mentioned.
Further, when the polyurethane resin is used as a solution, a water-soluble thickener can be added as necessary.

The fabric referred to in the present invention includes, for example, cotton, linen, wool, polyester fiber, acrylic fiber, and woven or nonwoven fabrics made by blending two or more of these, and is preferably supplied as an interlining.

When carrying out the present invention, a hot-melt adhesive cloth can be obtained by attaching the above-mentioned polyurethane resin at a solid content of 5 to 50 g per fiber weight. [Example] Polyoxyethylene glycol (molecular weight 1500) 15
12 weighing parts and 4 weighing parts of isophorone diisocyanate.
The reaction was carried out at 0° C. for 3 hours, and the reaction product was added to an aqueous solution of ethylenediamine consisting of 6 parts by weight of ethylenediamine and 30 parts by weight of water with stirring to obtain an aqueous solution of a water-soluble polyurethane resin.

Dissolve 1 part by weight of methylcellulose in 10 parts of this water-soluble polyurethane resin aqueous solution, and adjust the viscosity at 25°C to 700.
After setting it to 0 centipoise, a water-soluble polyurethane resin aqueous solution is applied in dots to the wool interlining, polyester interlining, and cotton interlining using a screen printing machine, and the water-soluble resin is dried by passing through a 110°C hot air drying chamber. A hot melt adhesive interlining fixed in dots with a resin solid content of 20 g/d was obtained.

For comparison, fine powder 3 of saponified ethylene-vinyl acetate copolymer (vinyl acetate content: 3%) was prepared by hydrolyzing 90% of the acetoxy groups.
A hot melt adhesive interlining was obtained by adhering a water suspension hot melt adhesive consisting of 1 part by weight, 1 part by weight of methyl cellulose, and 6 parts by weight to a cloth in the same manner as above.

These hot-melt adhesive interlinings were layered on polyester/cotton = 65135 plaid cloth, and the fabrics were bonded together by heating and pressing at 150°C and 300 g/CIL for one length using a single-sided heating gravity-type pressurizing device. .

Table 1 shows the results of testing these hot melt adhesive interlinings and polyester/cotton plaid cloth for peel strength, texture (bending resistance), and refusion properties after washing (peel strength).

It can be seen that the adhesive fabric of the present invention is superior to that of the comparative example.

Claims (1)

[Claims] 1. A hot-melt adhesive fabric coated with a water-soluble polyurethane resin consisting of a water-soluble polyoxyalkylene glycol, an organic diisocyanate compound, and optionally a chain extender.