A low-odor high-resilience sponge for passenger car seats and preparation method thereof

Abstract

The invention discloses a low-smell high-rebound sponge for seats of a passenger car. The sponge is prepared from a composite material and a black material according to a mass ratio of 100: 55-60, wherein the composite material comprises, by weight, 50 to 80 parts of polyether polyol, 20 to 50 parts of grafted polyether, 0.2 to 0.3 part of an amine catalyst, 0.2 to 0.5 part of an early-stage gel catalyst, 0.5 to 0.7 part of a later-stage gel catalyst, 3 to 4 parts of a foaming agent, 1 part of a cross-linking agent and 0.5 to 0.7 part of a stabilizing agent. The invention also discloses a preparation method for the sponge. The low-smell high-rebound sponge for seats of the passenger car employs the black material with low smell and hypotoxicity and the polyether composite material with low smell and hypotoxicity, so the standard smell grade of the sponge is 3.0, TVOC is 13.9 mu g C / g, and the sponge has the characteristics of low smell and high rebound and accords with requirements of people for environmental protection performance and mechanical properties of sponge of automobile seats.

Description

Technical field [0001] The invention belongs to the technical field of sponges, and relates to a sponge for passenger car seats with low odor and high resilience and a preparation method thereof. Background technique [0002] Sponge is a kind of polyurethane foam and belongs to soft polyurethane foam. Because of its porous honeycomb structure, it has excellent softness, elasticity, water absorption and water resistance. It is widely used in sofas, mattresses, clothing, Flexible packaging and other industries. With the development of the automotive industry, sponges for car seats have also received more and more attention. [0003] Car seat sponges are mostly high-resilient sponges, which are cold-cured, molded, and foamed from polyether-type composite materials and isocyanate-based materials. At present, there are mainly the following types of sponges for car seats: 1) TDI (Dimethyl Diisocyanate) system seat sponge: This type of seat sponge has low relative density, large foam vo...

AI Technical Summary

Problems solved by technology

At present, there are mainly the following types of sponges for car seats: 1) TDI (dimethyl diisocyanate) system seat sponge: this type of seat sponge has low relative density, large foaming volume, and comfortable hand feeling; but its support Insufficient strength, insufficient resilience, highly toxic raw materials, and unbearable odors will be emitted during the production process, which will seriously damage people's health

2) TM (mixture of dimethyl diisocyanate and diphenylmethane diisocyanate) system seat sponge: this kind of sponge feels comfortable, has good resilience, and its foaming volume is inferior to that of TDI system; Poisonous TDI raw materials, the production workshop still smells great

3) MDI (diphenylmethane diisocyanate) system seat sponge: This type of seat sponge has good resilience, high indentation hardness, and low raw material odor, so it has been greatly developed; but the current MDI system automobile The smell, TVOC (total volatile organic compound) content and resilience performance of seat sponge products cannot meet people's requirements for the environmental performance and mechanical properties of car seat sponges

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