Preparation method of breathable foamed insole

Abstract

The invention discloses a preparation method of a breathable foamed insole. The preparation method comprises the following steps: (1) internally smearing an insole mold with a demolding agent, uniformly scattering powdery water-containing magnesium silicate to a surface layer of the demolding agent, and maintaining the temperature of the mold at 38-40 DEG C for 30-40 minutes; (2) pouring toluene diisocynate and polyester polyol into a stirring bucket, mixing with a catalyst, a chain extender, a foaming agent and 9406 silicon oil, stirring for 1-2 minutes, adding isocyanate, stirring for 1-2 minutes, and heating to 35-40 DEG C; and (3) preheating the mold to 35-40 DEG C, simultaneously pouring a combined material into the mold and blowing the combined material by virtue of a blower gun, carrying out demolding and discharging after 30-40 minutes, and cutting the combined material into pieces according to the required size of the insole.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a breathable foamed insole. Background technique [0002] Insoles are widely used in the shoe industry, health care, and special functions; they are generally divided into two models: shoe-making industry-applied shoe-factory-applied insoles and market commodities. The insoles used in the shoe industry are mainly used to match the outsole and midsole of the shoe to make a corresponding shape; make a size board according to the last board or panel, and make the corresponding shape. Most of the materials used to make insoles are made of polyester fiber materials. Polyester fiber has excellent high strength, wear resistance and dimensional stability, but its moisture absorption rate is low, sweating is easy to slip, antibacterial and deodorant are poor, etc. Therefore, the composite insole made of polyester fiber weakens the comfort of the inso...

AI Technical Summary

Problems solved by technology

However, full water foaming is generally used for hard foam, and there are major defects in soft foam: 1. The strength of the foam is difficult to meet the strength requirements of the insole

2. The foaming temperature is difficult to control

The full water foaming process is adopted, the reaction temperature is high, the controllability of the reaction is poor, and the yield rate of the foamed polyurethane foam is low

[0004] In addition, the thin layer of polyurethane foam insole has a certain degree of air permeability, but because of the foam structure, the thickness of a generally practical foam insole must be at least 0.3 cm, and the insole has limited breathability and moisture permeability at this thickness.

Poor breathability and moisture permeability, poor comfort and strong smell

In addition, the polyurethane foam material is formed by the reaction of polyether polyol or polyester polyol and isocyanate. After the reaction, the polyurethane material is not hydrophilic, and the breathability and moisture permeability are not good.