JPH0966576A - Manufacture of laminated cloth for shoes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated cloth for shoes having excellent water resistant sticky strength, bending resistance, washing shape retentivity, permeability, moisture permeability and drying characteristics by holding drape strength (bending resistance) stable in a wide temperature range. SOLUTION: Adhesive containing 0.5 to 5 pts.wt. of water soluble epoxy compound as crosslinker and 0.2 to 2.5 pts.wt. of crosslinking accelerator added to 100 pts.wt. of carboxyl group modified rubber latex as main ingredients is prepared. Fabric backing 2 formed of hydrophobic synthetic fiber having water content of 1% or less at relative humidity of 65% at an ambient temperature of 20 deg.C via an adhesive layer 1 having 1.5 to 5 times of bubble fraction and the porosity prepared to 5,000 to 30,000 centipoise of the viscosity of the adhesive, and frontal cloth 3 formed of hydrophobic fiber having larger water content than that of the backing 2 are laminated, and then the porous adhesive layer 1 is crosslinked.

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 laminated shoe cloth, particularly a laminated shoe cloth useful as a shoe cover.

[0002]

2. Description of the Related Art Conventionally, a method for producing a laminated cloth is generally known in which a front cloth and a back cloth are bonded together through a porous adhesive layer formed by foaming rubber latex, and then the adhesive layer is crosslinked. It is known. Since these adhesive cloths have excellent air permeability because the adhesive layer has an open-cell structure, they are prized as adhesive cloths for shoe wear. In these pasting cloths for shoe lace, since natural or artificial fiber cloths such as cotton, suf, rayon, and acetate have been used for both the front cloth and the back cloth, the adhesiveness is relatively low. There was no problem. However, as a recent consumer need, water-repellent treatment or hydrophobic treatment is applied to the front cloth, and the back cloth tends to be woven or knitted using synthetic fibers, resulting in poor adhesion and bending resistance. It was not practical as a laminated cloth. In particular, as a laminated fabric for shoe garments, it lacked water-resistant adhesiveness and waist strength, and was insufficient for severe bending action in a wide temperature range.

[0003]

The present invention eliminates these drawbacks, maintains stable waist strength (flexibility) in a wide temperature range, and has excellent water-resistant adhesive strength, flex resistance, and laundry retention type. sex,
It is an object of the present invention to provide a laminated shoe cloth having breathability, moisture permeability and dryness.

[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.
Water-soluble amine-based crosslinking accelerator 0.2-2.5 parts by weight is added as the main component, which is foamed to adjust its viscosity to 5000-30,000 centipoise and is porous A backing cloth 2 composed of a hydrophobic synthetic fiber cloth having a water content of 1% or less at room temperature of 20 ° C. and a relative humidity of 65% through an adhesive layer 1 having a rate of 1.5 to 5 times; Moisture content backing 2
A method of manufacturing a laminated shoe cloth for shoes is characterized in that the porous adhesive layer 1 is cross-linked after pasting with a surface cloth 3 composed of larger hydrophobic fibers 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 can be obtained by emulsion polymerization of butadiene, an ethylenically unsaturated carboxylic acid, and other vinyl monomers.

The water-soluble epoxy compound used as the crosslinking agent in the present invention is at least selected from the group consisting of polyglycidyl ether of water-soluble polyalkylene glycol and polyglycidyl ether of polyoxyalkylenated polyhydric alcohol. One or more epoxy compounds having a main chain composed of two or more glycidyl ether groups and polyoxyalkylene in the 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 polyalkylene glycol diglycol, polypropylene glycol, polyalkylene glycol such as polyethylene propylene glycol obtained by copolymerizing ethylene oxyside and propylene oxide, and a polyalkylene glycol dialkyl group formed by glycidyl etherification of hydroxyl groups at both terminals. Glycidyl ether: a polyoxyalkylenated polyol obtained by glycidyl etherification of terminal hydroxyl groups of a polyoxyalkylenated polyol obtained by addition-polymerizing ethylene oxide and / or propylene oxide to a triol such as glycerin, trimethylolpropane and triethanolamine. Di (or tri, tetra) glycidyl ether and the like can be used. Those having an equivalent weight of these polyepoxides of 100 to 500 are preferable.

In the present invention, as the water-soluble amine-based crosslinking accelerator, ethanolamine, isopropanolamine, ethylenediamine, N, N-dimethylethanolamine, aminoethylethanolamine, N, N-
Diethylethanolamine, tetramethylenediamine,
Diethylenetriamine, triethylenetetramine, 2-
These are amines that are 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 polyester, acrylic, polyvinyl chloride, polyvinylidene chloride, etc. having a water content of 1.0%. What is composed of fibers is used.

As the surface cloth 3 used in the present invention, preferably, the moisture content of the fibers constituting the surface cloth 3 is 1.2.
% Or more of polyamide-based, polyolefin-based, polyurethane-based hydrophobic synthetic fibers or absorbent fibers such as cotton, suf, hemp, rayon, and acetate natural or synthetic fibers are acid chloride type, cyanate type, ketene dimer type Ester type water repellent such as, pyridine condensation type, ethylene urea type, methylol compound type, ethylene oxide type, ether type water repellent such as diatom compound type, fluorine compound type,
Hydrophobic treatment with adhesive type water repellent such as diatom compound type, carbon compound, etc., chromium complex compound type, titanium containing compound type, coordination bond type water repellent such as zirconium containing compound, etc. The one set to 2 or more is 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 it is less than that, the adhesive strength is greatly reduced, the shape retention property of the laundry is inferior and it is not suitable as a shoe cover, and if it is more than the above amount, the adhesive strength is not further improved, and rather the stability of the adhesive is maintained. This is because the productivity is poor and discoloration is large. In the present invention, the amount of the water-soluble amine-based crosslinking accelerator added is 0.2 to 2.5 with respect to 100 parts by weight of the carboxyl group-modified rubber latex.
The limitation to the parts by weight is that if the blending amount is less than that, there is no effect as an accelerator, and if the blending amount is more than that, the stability of the adhesive decreases significantly, there is a risk of gelation, and there is a drawback in practicality. There is.

Further, among the components constituting the adhesive layer 1, crosslinking accelerators such as thiourea-based, guanidine-based, thiazole-based, thiuram-based, dithiocarbamate-based, xanthate-based, organic or inorganic acids, metal salts and metal chelate compounds are included. , Protein, alginate, acrylic acid-based, polyvinyl alcohol-based, polyethylene oxide, thickeners such as fibrin derivatives, silicon-based, higher aliphatic alcohol-based, foam stabilizers such as fluorine-based, calcium carbonate, natural silicic acid salt,
Fillers such as synthetic silicates, antiaging agents, stabilizers, pH adjusters 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 device to adjust the viscosity to 5,000 to 30,000 centipoise. In the present invention, the viscosity of the adhesive is limited as described above because the backing cloth 2 is used when the viscosity becomes lower than that.
Alternatively, when the adhesive is applied to the front cloth 3, the adhesive permeates into the tissues of the back cloth 2 or the front cloth 3 to lower the air permeability or the foaming state becomes rough, and the foaming ratio (after foaming) (Volume of / volume before foaming) becomes high and the adhesive decreases, and when the viscosity is higher than that, the foaming ratio becomes low and air permeability decreases and workability deteriorates remarkably. Because.

In the present invention, the back cloth 2 or the front cloth 3 or both the back cloth 2 and the front cloth 3 are coated with the adhesive previously adjusted as described above by a reverse coater, a knife coater or a flow coater. It is applied by using an apparatus, and the back cloth 2 and the front cloth 3 are laminated by a conventional method, heated and dried, and further heated to crosslink the adhesive layer 1.

[0014]

[Examples] Adhesives having the compositions shown in Examples 1 to 3 in the upper part of Table 1 were mixed and foamed by a continuous foaming apparatus, and the viscosity was 10,
000 centipoise, foaming ratio was adjusted to 2 times, this was formed with rayon-french rack cloth made of rayon and cotton, and treated with a polyurethane resin for hydrophobic treatment, and the surface cloth 2 with a water content of 3% It is coated with a knife coater so that the coating thickness will be 0.3 mm on the surface to be laminated with the backing fabric 3 made of woven fabric composed of 20 count polyester spun yarn and having a moisture content of 0.7%. The back cloth 2 and the front cloth 3 are stuck together by this, and this is heated at 100 ° C. for 2 minutes to be dried, and further heated at 160 ° C. for 2 minutes to crosslink the adhesive layer 1 to produce a stuck cloth. Table 1 and Comparative Examples 1 and 2 in the upper row are compared and tested with a laminated fabric manufactured by the same process as in the example with the adhesive having the conventional composition, and the waist strength, the water resistant adhesive strength, the flex resistance, Washability, breathability, moisture permeability, and dryness were measured. To show.

[0015]

[Table 1]

[0016]

As can be seen from the lower part of Table 1, the laminated cloths obtained in the examples are lower in waist strength, water-proof adhesive strength, flex resistance, and wash-keeping type in a wide temperature range than the conventional ones. Remarkably good in air permeability, breathability, moisture permeability and dryness,
It was useful as a laminating cloth for shoes and shoes. Although polyester fiber woven cloth is used as the back cloth 2 in the examples, the same applies when polyester fiber knitted cloth is used. In particular, when a three-dimensional knitted fabric such as a W Russell knitted fabric is used as the backing fabric 2, it is possible to obtain a shoe lace material having good foot contact and excellent impact relaxation. In the present invention, the water-soluble epoxy compound in the components constituting the adhesive layer 1 not only acts as a crosslinking agent for the carboxyl group-modified latex, but also the hydroxyl groups and carbonyl groups of the fibers constituting the back cloth 2 and the front cloth 3. , Amino groups, chlorine groups, cyan groups, etc. are easily reacted, and partly due to the adhesiveness due to the primary bond with them, and further due to the affinity with them, the adhesiveness between the back cloth 2 and the front cloth 3 is remarkably high. It is considered that the laminated fabric for shoes which is improved and therefore has excellent waist strength, bending resistance and washing shape retention property 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 forming the back cloth 2 is made smaller than that of the fibers forming the front cloth 3, the back cloth 2 and the front cloth 3 are The difference in moisture absorption promotes the discharge of moisture due to the capillary phenomenon from the back cloth 2 facing the inside of the shoe to the outer cloth facing the outside air through the adhesive layer 1 having a porous open-cell structure and sweating during wearing. Moisture inside the shoe due to is quickly exhausted to the outside air, and the comfort is good, and the back cloth 2 facing the inside of the shoe, which tends to be relatively dry in terms of dryness after washing, is also quickly dried. It is considered possible.

[Brief description of drawings]

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

[Explanation of symbols]

 1. Adhesive layer 2. Lining 3. Table cloth

Claims (1)

[Claims] 1. A rubber latex 1 modified with a carboxyl group.
The main component is 0.5 to 5 parts by weight of a water-soluble epoxy compound as a cross-linking agent and 0.2 to 2.5 parts by weight of a water-soluble amine-based cross-linking accelerator to 100 parts by weight. ,
This was foamed to adjust its viscosity to 5000 to 30,000 centipoise, and through the adhesive layer 1 having a porosity of 1.5 to 5 times, at room temperature of 20 ° C. and 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 higher than that of the back cloth 2, the porous cloth A method for producing a laminated fabric for shoes, which comprises cross-linking a flexible adhesive layer 1.