Sole with high elasticity including complex mid-sole and preparing method

Abstract

The present invention relates to one kind of high elasticity shoe sole with composite middle sole and its making process. The shoe sole consists of a special upper sole body, a special lower sole body, a middle sole with a gas cushion layer comprising a heel gas bag and a middle gas bag, and an outer sole. The gas cushion layer of thermoplastic polyurethane has sealed gas cavity filled with argon; the upper sole body and the lower sole body are made of polyvinyl acetate; and the gas cushion layer is limited and adhered with no-hydrolysis adhesive between the upper sole body and the lower sole body. Argon can avoid oxidation and nitridation to retard the rate of the gas bag plastic in becoming hard and brittle. The high elasticity shoe sole has lasting elasticity, comfort and long service life.

Description

technical field [0001] The invention relates to the technical field of shoemaking, in particular to a high-elastic shoe sole with a composite midsole and a manufacturing method thereof. Background technique [0002] The soles of sports shoes popular on the market are mostly composed of midsole and outsole. In use, the midsole is located under the insole, and its softness and hardness directly affect the comfort of the feet when wearing. The outsole directly In contact with the ground, its wear resistance, folding resistance and certain softness indicators will be directly and closely related to the working life of the shoes and the comfort of consumers when wearing them. With the development of shoe-making technology, breakthroughs have been made in the technology of manufacturing soles, and the technology of manufacturing midsoles has attracted more and more attention. Its main focus is on how to improve the elasticity, fit and More durable wear resistance, folding resista...

AI Technical Summary

Problems solved by technology

The sole made of the midsole of this structure has a certain degree of elasticity when worn, and the foot fit is also good, but once it is punctured by hard and sharp debris on the ground, or the cushion or the outer sole is worn or broken, it will not be damaged. Fluid leakage is prone to occur, resulting in local collapse and buffer failure

In order to solve this problem, Chinese Patent No. 92100573.3 discloses a method of filling the gap of the original middle plate male mold with a plastic heat-expandable foam containing an appropriate amount of high foaming agent on the basis of initially making the upper and lower cushions. After the second heating of the molding machine, the upper and lower pads and the middle layer are fully cured in the midsole, which effectively solves the problems of liquid leakage caused by various factors and affects the working effect, and has certain working reliability.

However, because the foamed plastic filled on the middle layer of the midsole will become more and more compact after being repeatedly pressed by the user, or it will be crushed into pieces, causing the inside of the midsole to be uneven. In addition to causing uncomfortable wearing, it will still cause It is still unsatisfactory to cause the leakage of gas separated from the foamed plastic and affect the cushioning effect.

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