PU sponge with good air permeability and making method thereof

Abstract

The invention provides PU sponge with good air permeability. A raw material of the PU sponge comprises the following components in part by weight: 80-100 parts of polyurethane, 35-50 parts of fillingagent, 20-25 parts of foaming aid, 10-15 parts of adhesion promoter, 8-12 parts of water, 1-3 parts of antioxidant and 0.5-1 part of catalyst, wherein the foaming aid is a mixture of a foaming agent,benzotriazole, sodium borohydride and P-octyl phenol with a mass ratio of (1-5):(1-3):(3-5):(0.5-2); the adhesion promoter is a mixture of nitrile rubber, polyether polyol and epoxy resin with a massratio of (8-12):(3-7):(1-3). The PU sponge prepared by the raw material and a process provided by the invention has a density of 0.029 / mm<3>, a 25 percent of compression hardness is above 1.9 KPa, a porosity of a above 88 percent and a rebound rate of above 47 percent, thereby being high-quality sponge.

Description

technical field [0001] The invention belongs to the technical field of sponge foaming, and in particular relates to a PU sponge with good air permeability and a manufacturing method thereof. Background technique [0002] Sponge is a porous material with good water absorption and can be used to clean items. Commonly used sponges are made of wood cellulose fibers or foamed plastic polymers. There are many kinds of sponges. Among them, PU sponges are mainly obtained by foaming PU raw materials, and PU sponges have thermal insulation, heat insulation, sound absorption, shock absorption, Flame retardant, anti-static, good air permeability, etc., so it involves various industries including automobile industry, battery industry, cosmetics industry, bust underwear manufacturing industry and high-end furniture manufacturing industry. Among them, the air permeability of PU sponge determines its quality. The weight factor, and the sponge with good air permeability needs high porosity,...

AI Technical Summary

Problems solved by technology

Commonly used sponges are made of wood cellulose fibers or foamed plastic polymers. There are many kinds of sponges. Among them, PU sponges are mainly obtained by foaming PU raw materials, and PU sponges have thermal insulation, heat insulation, sound absorption, shock absorption, Flame retardant, anti-static, good air permeability, etc., so it involves various industries including automobile industry, battery industry, cosmetics industry, bust underwear manufacturing industry and high-end furniture manufacturing industry. Among them, the air permeability of PU sponge determines its quality. The weight factor, and the sponge with good air permeability needs high porosity, and then needs to add more foaming agent to promote more pores, which will relatively reduce the density of the sponge, thereby reducing its resilience, and then making it Its quality declines, therefore, it is of great economic significance to provide a kind of high-quality PU sponge with good air permeability

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