JPS6034594B2 - Water-soluble hot melt adhesive for temporarily fixing interlining - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water-repellent hot melt adhesive for temporarily fixing interlining.

In recent years, adhesives have been widely used in sewing clothing.

For example, when sewing the collar, cuffs, etc. of a dress shirt, the interlining is first coated with adhesive to prevent the interlining and outer material from slipping, and then temporarily bonded to the outer material, and then cut and sewn. Conventionally used adhesives for temporarily fixing interlining include hot-melt resins such as powdered hydrophobic resins such as nylon, polyethylene, and ethylene-vinyl acetate copolymer. Although it is useful as a hot melt type because of its thermal meltability, it has the disadvantage that it is hydrophobic and cannot be removed from the resin after temporary adhesion, which significantly impairs the feel of clothing.

In addition, water-meltable resins such as starch, cellulose derivatives, and acrylic acid derivatives are applied to the interlining and dried, and when the outer material is layered, water vapor is sprayed or water is sprayed to improve its re-adhesion. There is also a method of adhesion, but when spraying with water, the resin tends to partially penetrate into the interlining and outer material, causing stains and impairing the texture. Moreover, when processing the interlining material with the resin as a temporary interlining material, a drying process is required after application, and this process increases the cost.

Furthermore, there are adhesives made from acetoacetal and butyral from polyvinyl alcohol, which are hot-melt adhesives that do not require rewetting, but acetoacetal has hot-melt properties and can be removed by washing with water after final sewing. Products with a high degree of oxidation or butyralization cannot be powdered into appropriate particles and are unsuitable for use in powder form.Since they are used as an aqueous solution, they do not need to be dried after being applied to the interlining. In addition to this, it also requires a denaturing agent and a denaturing step to denature polyvinyl alcohol, which has the disadvantage of being expensive.

The present inventors have conducted intensive studies on a water-soluble hot melt adhesive for interlining temporary fixing that solves the drawbacks of such conventional adhesives, is inexpensive, and is easy to use.

As a result, a carboxyl group-containing powdered polyvinyl alcohol having an average degree of polymerization of 200 to 1000, a degree of saponification of 30 to 75 mol%, and a particle size of 10 to 150 mesh, preferably 60 to 100 mesh, was obtained. Because it is heat-meltable, it can be used as a hot melt type, and because it is water-soluble, it can be removed by washing with water after final sewing, so it does not affect the texture of the clothing at all, and the shape is similar to that of a powder. It was discovered that the interlining for temporary fixing could be easily processed due to the shape of the material, and the present invention was completed.

The water-soluble hot melt adhesive for interlining temporary fixing of the present invention has 13
Melt bonding is possible by iron pressing at a low temperature of 0 to 160 degrees Celsius, so there is no damage to the fabric.
In addition, since it can be easily dissolved and removed by washing, the fabric will not become stiff and there is no risk of spoiling the texture.

Therefore, it is ideal for applications where the texture of products is important, such as collars and cuffs of dresses such as thin georgette for women's clothing. Furthermore, since the adhesive of the present invention is in powder form, it has the great feature that it is easy to process the interlining for temporary fixing.

That is, the powdered adhesive is continuously spread onto the interlining using a spreader and heated for 7 to 1 degree of brightness at a temperature of 130 to 160 qo, thereby melting the resin and fusing it to the interlining. The obtained interlining is cut according to the purpose, overlapped with the outer material, and temporarily bonded with a heat press.The initial adhesive strength (setting time: 1 inch, pressure: 0.3 k9/lump) is 200. ~300 tano (0 sun)2, which is sufficient for practical use. Thereafter, the final stitching is performed and the product is removed by washing with water to obtain a product without damaging the texture of the fabric. The carboxyl group-containing modified polypinyl alcohol used in the present invention has an average degree of polymerization of 200 to 10
It is necessary that the degree of saponification is 30 to 75 mol%; outside these ranges, the above effects cannot be expected.
Above all, the average degree of polymerization is 250 to 600, and the degree of saponification is 4.
It is desirable to use 0 to 65 mol% since it can exhibit even better effects.

The amount of carboxyl group introduced is preferably in the range of 0.5 to 10 mol %, and the presence of this group further improves heat meltability and dissolution removability. If the amount of modification exceeds this range, it will be difficult to obtain a powder and the cost will increase, so it is not suitable for the present invention. Such carboxyl group-containing modified polypinyl alcohol is obtained as a saponified product of a copolymer of vinyl acetate monomer and a carboxyl group-containing monomer such as (anhydrous) maleic acid, acrylic acid, or methacrylic acid. be. In the present invention, the powdered carboxyl group-containing modified polypinyl alcohol can be used not only alone, but also in combination with a conventionally known water-soluble hot melt adhesive.

In particular, when using together with a denatured polyvinyl alcohol having an average degree of polymerization of 200 to 1000 and a degree of saponification of 30 to 75 mol%,
This is a more useful usage method from a cost standpoint. The amount used in this case is not particularly limited, but is usually 10 to 100% by weight based on the modified polyvinyl alcohol. Furthermore, in order to make the heat meltability and dissolution removability more effective, plasticizers may be used.

Examples of plasticizers include polyhydric alcohols such as solpit and mannitol, glycols such as glycerin, diglycerin, ethylene glycol, polyethylene glycol, propylene glycol, and methylbentantriol;
Examples include surfactants such as sorbitan aliphatic esters and their ethylene oxide adducts, and vinyl acetate oligomers. The amount added is preferably in the range of 1 to 10% by weight based on the polyvinyl alcohol. The particle size of the powdered carboxyl group-containing modified polyvinyl alcohol used in the present invention is suitably 10 to 150 mesh. In terms of speed, 60-1
00 mesh is preferred.

In addition, interlining processed with temporary interlining may cause blocking on the resin surface during winding. Therefore, anti-blocking agents such as higher fatty acid salts such as sodium stearate and fine powders such as colloidal silica are added to the powder. 0. citric acid etc.
It is preferable to add 0.01 to 1%. Next, the present invention will be specifically explained with reference to Examples.

Example 1 Polymerization degree of 25 on a fabric with 50 threads/inch of single thread of cotton
0 saponification degree 45 mol%, modification degree 5 mol%, particle size 60-1
00 mesh powdered maleic acid-modified polyvinyl alcohol was spread at a rate of 10 min/min, and passed through a hot air dryer set at 160°C at a speed of 35 skin/min to temporarily fix the hot melt adhesive to the fabric. I created the interlining.

Sandwich this interlining between the front and lining of the georgette fabric for women's summer dresses, and use a commercial 8-pound iron to set the temperature to 130 to 150 qo and press at 0.3 k9.
/ for 10 seconds. The peel strength of this adhesive interlining was 350 mm/(inch)2. Next, three layers of georgette outer fabric, hair fabric, and interlining were sewn using a sewing machine, washed in a household washing machine with 30 qo of water under a whirlpool for 5 minutes, and air-dried.

The peel strength of this sewn interlining was zero, and the glue was completely removed by washing with water. Additionally, the texture of the georgette fabric was maintained.・Comparative example 1 In Example 1, instead of maleisic acid-modified polyvinyl alcohol, polymerization degree of 25 or higher, saponification degree of 45 mol%, particle size of 60
An interlining was prepared in accordance with the same procedure except that unmodified powdered polyvinyl alcohol of ~100 mesh was used, and when it was heat-pressed, its peel strength was 300 mm/(P dimension) 2.

Further, when desizing was performed under the same conditions as in Example 1, the desizing rate was only 65%.

Therefore, the feel of the georgette fabric was also inferior to that of Example 1. Comparative Example 2 Tetoron/cotton blend fabric with 95 single threads per thread, polymerization degree 250, saponification degree 45 mol%, particle size 60~
8 evenings of 100 mesh powdered polyvinyl alcohol/
The hot-melt adhesive was spread on the fabric at a rate of 100 ml, and passed through a hot air dryer set at 16,000 ml at a speed of 35/min to temporarily fix the hot-melt adhesive to the fabric to create an interlining.

This interlining material was sandwiched between the front and lining of the georgette fabric for women's summer dresses, and the temperature was set to 130-150 x 0 using a household 2-pound iron, and the pressure was 0.3 k9.
/ for 7 seconds. The peel strength of this adhesive interlining was 280 mm/(inch)2. Next is the Georgette table.
Sewn three layers of lining and interlining with a sewing machine, wash in a household washing machine with 40:00 water for 15 minutes, and then wash
After repeating the process several times, it was air-dried. The peel strength of this sewn interlining was zero, and the glue was completely removed by washing with water. Additionally, the texture of the georgette fabric was maintained. Example
Polymerization degree: 60, resaponization degree: 65 mol%, modification degree: 5 mol%, particle size: 20
~30 mesh powdered maleic acid-modified polyvinyl alcohol was spread at a rate of 15 coats/minute and passed through a hot air dryer set at 160°C at a rate of 20 coats/minute to temporarily apply the hot melt adhesive to the fabric. I fixed it and created an interlining.

Sandwich this interlining between the front and lining of a women's broadcloth fabric and use an 8-pound commercial iron at 1 temperature.
The temperature was set at 30 to 150, and the pressure was 0.3 kg/h, and heat and pressure bonding was carried out between 1 piece of rat sand. The peel strength of this adhesive interlining is 350/(
吋) It was 2. Next, the front, lining, and interlining fabrics of the broadcloth are sewn together using a sewing machine, and then washed in a home washing machine for 4 plies.
The sample was washed with water under a vortex for 18 minutes, refluxed twice, and then air-dried. The peel strength of this sewn interlining was zero, and the glue was completely removed by washing with water. In addition, the texture of the broadcloth was maintained. Control example 3 A commercially available polymerization degree of 700 and particle size of 60 was added to the same fabric as in Example 1.
~100 mesh ethylene single-wart vinyl oxide copolymer resin (
Ethylene/vinyl acetate = 95/5) was treated in the same manner as in Example 1 to create an interlining.

Claims (1)

[Claims] 1 Average degree of polymerization 200-1000, degree of saponification 30-75
A water-soluble hot-melt adhesive for temporarily fixing interlining, which is made of a powdered carboxyl group-containing modified polyvinyl alcohol having a mol% particle size of 10 to 150 mesh.