JP2724554B2 - Manufacturing method of laminating cloth for shoes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a shoe-bonded cloth, particularly a shoe-bonded cloth useful for a shoe upper or the like.

[0002]

2. Description of the Related Art Conventionally, a method for producing a laminating cloth in which a front cloth and a back cloth are laminated via a porous adhesive layer formed by foaming a rubber latex and then the adhesive layer is crosslinked is generally used. It is known. These laminating cloths are excellent in air permeability because the adhesive layer has an open-cell structure, and are awarded as laminating cloths for shoe uppers. Conventionally, in these laminating cloths for shoe uppers, natural or man-made fiber cloths such as cotton, suf, rayon, and acetate have been used for both the front cloth and the back cloth. There was no problem. However, as a recent consumer need, the surface cloth is subjected to water repellency treatment or hydrophobic treatment, and the back cloth tends to use woven or knitted fabrics made of synthetic fibers, resulting in poor adhesiveness and bending resistance. The plying cloth lacked practicality. In particular, the laminating cloth for shoe caps lacked water-resistant adhesiveness and waist strength, and was inadequate against severe bending action in a wide temperature range.

[0003]

SUMMARY OF THE INVENTION The present invention eliminates these drawbacks, maintains stable waist strength (bending flexibility) in a wide temperature range, and has excellent water-resistant adhesive strength, bending resistance, and a washing mold. sex,
It is an object of the present invention to provide a shoe bonding cloth having air permeability, moisture permeability, and drying property.

[0004]

According to the present invention, 0.5 to 5 parts by weight of a water-soluble epoxy compound as a crosslinking agent is added to 100 parts by weight of a carboxyl group-modified rubber latex.
As a main component, a water-soluble amine-based cross-linking accelerator to which 0.2 to 2.5 parts by weight is added is foamed, and its viscosity is adjusted to 5000 to 30,000 centipoise. A back cloth 2 made of a hydrophobic synthetic fiber cloth having a moisture content of 1% or less at room temperature 20 ° C. and a relative humidity of 65% via an adhesive layer 1 having a ratio of 1.5 to 5 times; Moisture content is back cloth 2
The gist of the present invention is a method of manufacturing a laminating cloth for shoes, which comprises laminating a surface cloth 3 composed of larger hydrophobic fibers and then crosslinking the porous adhesive layer 1. It is.

In the present invention, examples of the carboxyl group-modified rubber latex include carboxyl group-modified styrene butadiene rubber latex, carboxyl group-modified acrylonitrile butadiene rubber latex, and carboxyl group-modified methyl methacrylate butadiene rubber latex. Such a carboxyl group-modified rubber latex is obtained by emulsion polymerization of butadiene, ethylenically unsaturated carboxylic acid, and other vinyl monomers.

The water-soluble epoxy compound used as a crosslinking agent in the present invention is at least one selected from the group consisting of a water-soluble polyalkylene glycol polyglycidyl ether and a polyoxyalkylenated polyhydric alcohol polyglycidyl ether. One or more epoxy compounds having a main chain composed of two or more glycidyl ether groups and polyoxyalkylene in a molecule,
It is highly reactive with fibers, has good affinity for carboxyl group-modified rubber latex, and has excellent stability. Specific examples of these compounds include polyethylene glycol, polypropylene glycol, polyalkylene glycol such as polyethylene propylene glycol obtained by copolymerizing ethylene oxyside and propylene oxide. Glycidyl ether: a polyoxyalkylenated polyol obtained by subjecting a terminal hydroxyl group of a polyoxyalkylenated polyol obtained by addition polymerization of ethylene oxide and / or propylene oxide to a triol such as glycerin, trimethylolpropane or triethanolamine to glycidyl ether. Di (or tri, tetra) glycidyl ether and the like can be used. Those having a polyepoxide equivalent of 100 to 500 are preferred.

In the present invention, water-soluble amine-based crosslinking accelerators include ethanolamine, isopropanolamine, ethylenediamine, N, N-dimethylethanolamine, aminoethylethanolamine, N, N-
Diethylethanolamine, tetramethylenediamine,
Diethylenetriamine, triethylenetetramine, 2-
These are amines soluble in water and alcohol such as ethylhexylamine.

The backing cloth 2 composed of hydrophobic synthetic fibers used in the present invention is made of a polyester, acrylic, polyvinyl chloride, polyvinylidene chloride or the like having a water content of 1.0%. Those composed of fibers are used.

[0009] As the surface cloth 3 used in the present invention, the fiber constituting the surface cloth 3 preferably has a water content of 1.2.
% Or more of hydrophobic synthetic fibers such as polyamide-based, polyolefin-based and polyurethane-based or absorbent fibers such as natural or synthetic fibers such as cotton, staple, hemp, rayon, and acetate, etc. are acid chloride type, cyanate type, ketene dimer type. Ester type water repellents such as ester type water repellents, pyridine condensed type, ethylene urea type, methylol compound type, ethylene oxide type, keiso compound type etc., fluorine compound type,
Adhesion type water repellent such as cesium compound type, carbon compound, etc., hydrophobic treatment with coordination bond type water repellent such as chromium complex type, titanium containing compound type, zirconium containing compound, etc. Those set to two or more are used.

In the present invention, the amount of the water-soluble epoxy compound constituting the adhesive layer 1 is limited to 0.5 to 5 parts by weight based on 100 parts by weight of the carboxyl group-modified rubber latex. If the amount is less than this, the adhesive strength is greatly reduced, the washing retention is poor, and it is not suitable as a shoe cap, and if the amount is more than that, the adhesive strength is not further improved, but rather the stability of the adhesive. This is because productivity is poor and discoloration is large. In the present invention, the compounding amount of the water-soluble amine-based crosslinking accelerator is 0.2 to 2.5 parts by weight based on 100 parts by weight of the carboxyl group-modified rubber latex.
The reason for limiting to parts by weight is that if the compounding amount is less than that, there is no effect as an accelerator, and if it is more than that, the stability of the adhesive is significantly reduced, there is a risk of gelation, and there is a disadvantage in practicality There is.

Further, the components constituting the adhesive layer 1 include a crosslinking accelerator such as a thiourea-based, guanidine-based, thiazole-based, thiuram-based, dithiocarbamate-based, xanthate-based, organic or inorganic acid, metal salt and metal chelate compound. , Protein, alginate, acrylic acid, polyvinyl alcohol, polyethylene oxide, thickeners such as cellulose derivatives, silicones, higher aliphatic alcohols, fluorine-based foaming agents, etc., calcium carbonate, natural silica salt,
A filler such as a synthetic silicate, an antioxidant, a stabilizer, a pH adjuster, and the like may be added.

These adhesive layer 1 forming agents are mixed and foamed by a hand mixer, a cake mixer, or a continuous foaming apparatus, and the viscosity is adjusted to 5,000 to 30,000 centipoise. In the present invention, the reason for limiting the viscosity of the adhesive as described above is that if the viscosity becomes lower than that,
Alternatively, when the adhesive is applied to the front cloth 3, the adhesive penetrates into the tissue of the back cloth 2 or the front cloth 3, and the air permeability is reduced or the state of foaming becomes rough, and the foaming ratio (after foaming) (Volume / volume before foaming) increases and the adhesive decreases, and when the viscosity is higher than that, the foaming ratio decreases, the air permeability decreases, and the workability deteriorates significantly. Because.

In the present invention, the adhesive prepared in advance as described above is applied to the back cloth 2 or the top cloth 3 or both the back cloth 2 and the top cloth 3 by using a reverse coater, a knife coater or a flow coater. Using a device, the back cloth 2 and the front cloth 3 are bonded by a conventional method, dried by heating, and further heated to crosslink the adhesive layer 1.

[0014]

EXAMPLE An adhesive having the composition shown in Examples 1 to 3 in the upper part of Table 1 was mixed and foamed by a continuous foaming apparatus.
2,000 centipoise, foaming ratio was adjusted to 2 times, and this was formed with a ray cotton and cotton blended ray cotton French rack cloth, treated hydrophobically with a polyurethane resin, and had a moisture content of 3%. Coating with a knife coater so that the coating thickness is 0.3 mm on the surface to be bonded to the backing cloth 3 made of a woven cloth composed of 20th-number polyester spun yarn and having a moisture percentage of 0.7%, The backing cloth 2 and the top cloth 3 are bonded together, heated at 100 ° C. for 2 minutes and dried, and further heated at 160 ° C. for 2 minutes to crosslink the adhesive layer 1 to produce a bonded cloth. Is compared with a laminated fabric manufactured by the same process as in the example using the adhesive having the conventional composition shown in Table 1 and Comparative Examples 1 and 2 in the upper row, and the waist strength, the water-resistant adhesive strength, the bending resistance, The washability, air permeability, moisture permeability, and dryness were measured. To show.

[0015]

[Table 1]

[0016]

As can be seen from the lower part of Table 1, the laminating cloth obtained according to the embodiment has a waist strength, a water-resistant adhesive strength, a bending resistance and a laundering property in a wide temperature range which are different from those of the conventional one. , Breathability, moisture permeability, drying properties are remarkably good,
It was useful as a laminating cloth such as a shoe jacket. Although a polyester fiber woven fabric is used as the backing cloth 2 in the embodiment, the same applies when a polyester fiber knitted fabric is used. In particular, when a three-dimensional knitted fabric such as a W Russell knitted fabric is used as the backing cloth 2, a shoe cover material having good foot contact and excellent impact relaxation properties can be obtained. In the present invention, the water-soluble epoxy compound in the component constituting the adhesive layer 1 acts not only as a crosslinking agent for the carboxyl group-modified latex, but also as a hydroxyl group and a carbonyl group in the fibers constituting the back cloth 2 and the front cloth 3. , Amino group, chlorine group, cyan group, etc., and the adhesion between the back cloth 2 and the top cloth 3 is remarkable due in part to the adhesion due to the primary bond therewith and the affinity for these. It is thought that a laminated fabric for shoes with improved waist strength, bending resistance and washability can be obtained. Since the back cloth 2 and the front cloth 3 are made of hydrophobic fibers, and the moisture content of the fibers constituting the back cloth 2 is made smaller than the moisture content of the fibers constituting the front cloth 3, the back cloth 2 and the front cloth 3 The difference in moisture absorption promotes the discharge of moisture from the back cloth 2 facing the inside of the shoe, through the adhesive layer 1 having a porous open-cell structure, and to the outer cloth 3 facing the outside air by capillary action, and sweating during wear. The moisture inside the shoes is quickly discharged to the outside air, the comfort is good, and the backing cloth 2 facing the inside of the shoes, which tends to dry relatively easily, is also quickly dried in terms of drying properties after washing. It is thought that it is possible.

[Brief description of the drawings]

FIG. 1 is a sectional view of a laminated cloth obtained by the production method of the present invention.

[Explanation of symbols]

 1. 1. Adhesive layer Back cloth 3. Table cloth

Claims (1)

(57) [Claims] A carboxyl group-modified rubber latex 1
The main components are those obtained by adding 0.5 to 5 parts by weight of a water-soluble epoxy compound as a crosslinking agent and 0.2 to 2.5 parts by weight of a water-soluble amine-based crosslinking accelerator to 00 parts by weight. ,
The foam was foamed to adjust its viscosity to 5,000 to 30,000 centipoise, and through an adhesive layer 1 having a porosity of 1.5 to 5 times at room temperature of 20 ° C. and a relative humidity of 65%. After laminating a back cloth 2 made of a hydrophobic synthetic fiber cloth having a water content of 1% or less and a front cloth 3 made of hydrophobic fibers having a water content larger than that of the back cloth 2, the back cloth 2 is formed. A method for producing a laminating cloth for shoes, characterized in that the adhesive layer (1) is crosslinked.