Slow-rebound memory sponge insole material

Abstract

The invention relates to a slow-rebound memory sponge insole material which is characterized by comprising the following main raw materials: polyalcohol, isocyanate, pore forming agent, pore reforming agent, catalyst, foaming agent, glycerol and MDI (methylenediphenyl diisocyanate) prepolymer. The polyalcohol is composed of polyether polyalcohol and polymer polyalcohol, the hydroxyl value of the polyether polyalcohol is 30-350 mg KOH / g, the molecular weight is 700-3000, and the consumption is 30-60 wt%; the hydroxyl value of the polymer polyalcohol is 28-32 mg KOH / g, the molecular weight is 5000-7000, and the polymer polyalcohol accounts for 30-50 wt% of the polyalcohol; the isocyanate accounts for 30-60 wt% of the polyether polyalcohol; the catalyst is composed of an amine catalyst and a tin catalyst, the amine catalyst accounts for 0.15-0.45 wt% of the polyether polyalcohol, and the tin catalyst accounts for 0.03-0.3 wt% of the polyether polyalcohol; the foaming agent is water, and accounts for 0.9-2.5 wt% of the polyalcohol; the pore forming agent is polyoxypropylene ether, and accounts for 1.5-5 wt% of the polyalcohol; and the pore reforming agent is polysiloxane polyether copolymer, and accounts for 0.8-2 wt% of the polyalcohol. The insole material provided by the invention has the characteristics of light weight, slow rebound and the like.

Description

technical field [0001] The invention relates to a slow rebound memory foam insole material. Background technique [0002] The insole materials currently on the market mainly include EVA, textiles, natural or artificial leather, and perfusion PU. [0003] The characteristics of foamed EVA: good softness and cheap price, but it has no elasticity, it will deform, it will become less soft and elastic, and the insole will become flat. [0004] Textiles, especially cotton, have good warmth retention properties, are easy to obtain, are natural and environmentally friendly, and can also have a certain breathable effect, but they have a short service life, are prone to fiber knotting, poor elasticity, and are not suitable for washing. [0005] Natural or artificial leather shoe materials mainly have relatively poor elasticity, especially artificial leather, which will stink feet; although natural leather has relatively good air permeability, the price of the material is relatively h...

AI Technical Summary

Problems solved by technology

[0003] The characteristics of foamed EVA: good softness, cheap price, but no elasticity, it will be deformed, it will become less soft and elastic, and the insole will become flat

[0004] Textiles, especially cotton, have good warmth retention properties, are easy to obtain materials, are natural and environmentally friendly, and can also have a certain breathable effect, but they have a short service life, are prone to fiber knots, poor elasticity, and are not suitable for washing.

[0005] Natural or artificial leather shoe materials mainly have relatively poor elasticity, especially artificial leather, which will stink feet; although natural leather has relatively good air permeability, the price of the material is relatively high

[0006] The infused PU shoe material has good softness and good elasticity. The key is that it will not deform. It is as soft and elastic as time goes by. Shen, the biggest disadvantage is that it is airtight and easy to hydrolyze. No matter how good the PU is, if it is "Hong Kong foot", it will hydrolyze at most half a year.

[0007] From the above comparison, it can be seen that there is a shortage of a new type of insole material that is cheap, good in quality, good in physical properties, and can be washed and worn repeatedly in the market.