JP2764201B2 - Method for manufacturing shoe upper covering material with form stability - 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 upper covering material having shape stability.

[0002]

2. Description of the Related Art Conventionally, a cover is formed by a cloth in which a top cloth and a back cloth are bonded with an adhesive layer of natural rubber and styrene-butadiene rubber, and shoes are assembled using the cloth. The shoe is assembled by hanging a rubber sole, a toe heel reinforcing piece, a rim tape and other rubber shoe parts on this cap, and then the vulcanized can is used as an adhesive. The shoe was completed by heating and vulcanizing rubber shoe parts.

[0003] In the shoes completed in this manner, the bonding adhesive layer of the upper shell is cracked or peeled off due to the bending action at the time of wearing, or the recovery from bending deformation is lost.
In addition, there has been a drawback in that the upper fabric and the back fabric constituting the upper cover shrink due to the washing and wrinkles are generated on the upper cover, and the shoes are deformed.

[0004]

SUMMARY OF THE INVENTION The present invention relates to an adhesive,
An object of the present invention is to provide shoes having good form stability over a long period of time by providing a bonded fabric having excellent bending resistance, elastic recovery, washing shrinkage resistance, and wrinkle resistance as a covering material.

[0005]

The present invention will be described below with reference to the drawings showing an embodiment of the present invention. According to the present invention, a front cloth 11 and a back cloth 12 treated with a cellulose-reactive resin are combined with a polybutadiene rubber in a rubber component. Isocyanate dissociation temperature of 110 to 100 parts by weight of rubber containing 10 to 50% by weight of
After adhering with an adhesive layer 13 mainly containing 3 to 20 parts by weight of a block isocyanate compound added to the adhesive layer 1 at a temperature of 110 to 170 ° C, the adhesive layer 1 is heated to 110 to 170 ° C.
SUMMARY OF THE INVENTION The gist of the present invention is a method for producing a shoe upper covering material having form stability, characterized by vulcanizing No. 3.

In the present invention, the cellulose-reactive resin hardly reacts with each other, but reacts with the hydroxyl groups of the cellulose constituting the fabric to form cross-links between the molecules. To insolubilize and impart shrinkage resistance and wrinkle resistance to the fabric,
This is to improve the form stability. These resins include ethylene urea type, propylene urea type and glyoxa
Examples thereof include cellulose-reactive resins such as a lumonourein type, an etherified type, a low phorether type, a low foretherified type, and a non-formalin type. One or more of these resins are used as a base resin, and if necessary, a control resin, a catalyst, a penetrating agent, and a softening agent for accelerating a reaction at the time of heat treatment of the base resin and the control resin. A fiber treatment agent such as a water repellent, an antistatic agent and a sanitary agent is added, and these compounds are mixed with water as a solvent to prepare a treatment liquid for the front cloth 11 and the back cloth 12.

In the present invention, the front cloth 11 and the back cloth 12 are made of natural fiber cloth such as cotton, cloth, linen, etc., artificial fiber cloth such as visco-rayon, cupra, polyamide-based, polyester-based, polyacryl-based, etc. It is composed of a synthetic fiber cloth of polyolefin, polyvinyl, polyurethane or the like, or a mixed cloth of these fibers.

The front cloth 11 and the back cloth 12 prepared as described above are immersed in the above-mentioned treatment liquid, squeezed, pre-dried, heat-treated and washed, finished, and subjected to a finishing treatment. And the back cloth 12 is prepared.

In the present invention, the rubber components constituting the adhesive layer 13 are polybutadiene rubber such as high cis 1,4 polybutadiene rubber, low cis polybutadiene rubber, trans 1,4 polybutadiene rubber, and other rubbers, that is, natural rubber, styrene butadiene. It is composed of a mixture of rubber, nitrile rubber and chloroprene rubber. The weight percentage of the polybutadiene rubber in the rubber component is limited to 10 to 50. When the ratio of the polybutadiene rubber is less than that, the rebound resilience of the adhesive layer is reduced, and the form stability of the cap is reduced.
Further, if the ratio of the polybutadiene rubber is higher than that, there is a disadvantage that the bonding strength is reduced and the bonding strength between the front cloth 11 and the back cloth 12 is reduced. In the present invention, as the block isocyanate compound to be added to the rubber component, for example, a compound obtained by blocking the following isocyanate compound with the following blocking agent is used. Examples of the diisocyanate compound include ethylene diisocyanate, propylene diisocyanate,
Tetromethylene diisocyanate, hexamethylene diisocyanate, decamethylene diisocyanate, phenylene diisocyanate, tolylene diisocyanate, naphthylene diisocyanate, 4-4 'ethylenepis (Phenyl isocyanate), ω · ω′-diisocyanate 1,3-dimethylbenzene, ω · ω′-diisocyanate
1,4-dimethylbenzene, 1-methyl-2,4-diisocyanatocyclohexane, ω · ω′-diisocyanate diethylbenzene, ω · ω′-diisocyanate dimethyltoluene, ω · ω′-diisocyanate Diethyltoluene, ω · ω′-diisocyanate-dimethylxylene, ω · ω′-diisocyanate-diethylxylene,
ω ・ ω′-diisocyanate dimethylcyclohexane,
4,4′-methylene-bis (cyclohexyl isocyanate), 4,4-ethylene-bis (cyclohexyl isocyanate), isophorone diamine diisocyanate,
An excess of lysine diisocyanate or the above diisocyanate compound with a low molecular weight diol such as ethylene glycol, propylene glycol, 1,3-butylene glycol, neopentyl glycol, etc. A diisocyanate compound obtained by an addition reaction is exemplified. Examples of the blocking agent include alcohols such as methanol, ethanol, ethoxyethanol and methoxyethanol.
Aromatic amines such as diphenylamine and xylidine; imides such as succinimide and phthalic imide; active methylene compounds such as acetylacetone and diethylmalonate;
Caprolactams such as ε-caprolactam and butyrolactam, phenols such as phenol, cresol and P-hydroxymethylbenzoate, oximes such as cyclohexane oxime and methyl ethyl ketoxime, imines and ureas And the like. These block isocyanate compounds are used at a temperature of 110 ° C to 170 ° C.
The blocking agent is dissociated from the compound and activated to an isocyanate compound having an active isocyanate group. These block isocyanate compounds are appropriately selected and used in accordance with the vulcanization temperature of the adhesive layer 13 so that the isocyanate compound is activated at the vulcanization temperature. In the present invention, the compounding amount of the block isocyanate compound in the compounding of the adhesive layer 13 is limited to 3 to 20 parts by weight with respect to 100 parts by weight of rubber, because the compounding amount is less than that. For example, the adhesive strength between the front cloth 11 and the back cloth 12 is reduced, and if the amount is more than that, the heating during the vulcanization causes the adhesive layer 13 to become discolored, thereby contaminating the shell and blocking isocyanate. Ne
This is because the compound itself is expensive and has a disadvantage of increasing the cost.

In the present invention, the adhesive previously compounded on the front cloth 11 and the back cloth 12 as described above is reverse-coated.
Coating is performed by using a coating device such as a coater, knife coater, or flow coater, and the surface cloth 11 and the back cloth 12 are laminated by a conventional method using a roll. The heat drying is performed at a temperature lower than the vulcanization temperature of the adhesive layer, that is, lower than the activation temperature of the isocyanate compound. The vulcanization of the adhesive layer 13 interposed between the front cloth 11 and the back cloth 12 is performed by assembling the shoes using the upper 1 in the manufacturing process, that is, the upper formed by the upper. And the shoe members such as rubber soles, edge tapes, toe reinforcing pieces, and heel reinforcing pieces are adhered to the cap, and then introduced into a vulcanizing can for vulcanization. If it is based on the production of so-called hot air vulcanization type shoes, it is preferable to vulcanize these shoe members at the same time, and it is not necessary to vulcanize the shoe members in the shoe manufacturing process as in the case of injection molded shoes. If it is a thing, the front cloth 11 and the back cloth 12
It is convenient to vulcanize immediately after bonding.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cotton cloth 79 No. bleached cloth is used as a front cloth 11 and a back cloth 1 is used.
As No. 2, a T / C class 3 twill woven fabric was immersed in a cellulose-reactive resin solution shown in Table 1 for 5 seconds, squeezed to a squeezing ratio of 75%, pre-dried at 100 ° C. for 2 minutes, and then at 150 ° C. for 3 minutes. By heating, the resin contained in the solution was reacted with the fibers of the cloth constituting the front cloth 11 and the back cloth 12, and was fixed to the front cloth 11 and the back cloth 12. Table cloth 11 and back cloth 1 prepared as described above
2 was applied with a knife coater to the bonding surfaces of the front cloth 11 and the back cloth 12 so that the respective coating thicknesses would be 0.5 mm, with the adhesives shown in Table 2, Examples 1, 2 and 3. The adhesive layer 13 was dried by heating at 80 ° C. for 2 minutes. The covering material thus bonded is cut and sewn to form a covering, which is hung on the last, and a rubber tape is attached to a bottom surface of the covering and a shoe sole to a periphery under the covering. After assembling the shoe by adhering rubber shoe members such as rubber reinforcing pieces to the toe and the heel, it is introduced into a vulcanized can by a conventional method at 150 ° C. and 3.5 kg / cm ² for 30 minutes. The rubber shoe members are vulcanized by heating and pressurizing, and at the same time, the isocyanate groups of the block isocyanate compound contained in the adhesive layer 13 of the bonding cloth constituting the cover material are dissociated and vulcanized. The shoes assembled on the last were removed from the last to complete the shoes. The shoes completed as described above are removed from the last, and the shoes completed in the same manner as in the comparative example and the bonding cloth constituting the shoe upper covering material, adhesive strength, bending resistance, form recovery, washing Table 3 shows the measured shrinkage and wrinkle resistance.

[Table 1] (Note 1) Trade name: Glyoxal monourein type fibrous reactive resin manufactured by Dainippon Ink and Chemicals, Inc. (Note 2) Trade name: Ethylene urea type fibrous resin manufactured by Dainippon Ink and Chemicals, Inc. Reactive resin (Note 3) Trade name. Metal salt catalyst manufactured by Dainippon Ink and Chemicals, Inc. (Note 4) Tradename. Special activator penetrant made by Dainippon Ink and Chemicals, Inc.

[Table 2]

[Table 3]

[0011]

As can be seen from Table 3, the present invention is based on a bonded fabric having excellent form stability, excellent in adhesiveness, bending resistance, elastic recovery, washing shrinkage resistance and wrinkle resistance. I was able to obtain the scabbard material. This is due to the fact that the front cloth 11 and the back cloth 12 constituting the shoe upper covering material are chemically bonded to and reinforced with the cellulose-reactive resin, and that the adhesive layer 13 for bonding the front cloth 11 and the back cloth 12 has Butadiene rubber having excellent rebound resilience is blended, and the decrease in adhesiveness due to the butadiene rubber blending is caused by the fact that the block isocyanate compound added to the adhesive layer 13 becomes reactive due to heating during the vulcanization of the adhesive layer 13. Releases an active isocyanate group which is excellent
This isocyanate group is used for the front cloth 11, the back cloth 12, and the front cloth 11.
And the remaining amino groups contained in the fibrin-reactive resin and the rubber component constituting the adhesive layer 13 which are reactively fixed to the backing cloth 12,
It is considered that it reacts with an alcohol group, a urea group, a hydroxyl group, a carboxyl, and the like, thereby firmly bonding the front cloth 11 and the back cloth 12 and further increasing the rebound resilience of the adhesive layer 13.

[Brief description of the drawings]

FIG. 1 is a sectional view of a shell material according to the present invention.

[Explanation of reference numerals] Table cloth 12. Backing cloth 13. Adhesive layer

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) A43D 21/00 A43B 23/02

Claims (1)

(57) [Claims] 1. A front cloth 11 and a back cloth 12 treated with a cellulose-reactive resin are combined with a polybutadiene rubber in
After bonding with an adhesive layer 13 containing 3 to 20 parts by weight of a block isocyanate compound having an isocyanate dissociation temperature of 110 to 170 ° C. per 100 parts by weight of rubber containing 50% by weight. , This is 110-170
A method of producing a shoe upper covering material having form stability, characterized in that the adhesive layer 13 is vulcanized by heating to a temperature of ° C.