Polyurethane foam special for automobile seat and preparation method

Abstract

Polyurethane foam special for an automobile seat is prepared by the following raw materials of, by weight ratio, 90-95 parts of 2-3 types of polyether polyol, 0.2-0.6 part of 2-3 types of amine catalysts, 1-2 parts of hard bubble silicone oil, 1-2 parts of cell openers, 2-5 parts of foaming agents, 1-2 parts of chain extenders, 20-25 parts of diphenylmethane diisocyanate (MDI) and 20-25 parts of toluene diisocyanate (TDI). A preparation method includes putting the raw materials into an A raw material bucket and a B raw material bucket of a foaming machine, then using the foaming machine to pour the raw materials in the A raw material bucket and the B raw material bucket into a mould according to the weight ratio of the raw materials, mixing the raw materials in the mould for 3-5 minutes and performing demoulding to obtain the polyurethane foam. The polyurethane foam can be prepared at the normal temperature, the working process is simple, and the polyurethane foam is energy-saving, environment-friendly and good in quality.

Description

technical field [0001] The invention belongs to the field of polyurethane material manufacturing, and in particular relates to a special polyurethane foam for car seats and a preparation method. Background technique [0002] Polyurethane foam is made of isocyanate and hydroxyl compound through polymerization and foaming. According to its hardness, it can be divided into two types: soft and hard, of which soft is the main variety. Generally speaking, it has excellent elasticity, softness, elongation and compressive strength; good chemical stability, resistance to many solvents and oils; excellent abrasion resistance, 20 times larger than natural sponge; and excellent processing It is a cushioning material with excellent performance, and is widely used in car seats. [0003] The invention of the application number 201080038410.5 discloses a flexible polyurethane foam and its manufacturing method, which is characterized in that it contains organic polyisocyanate (A), polyol (B...

AI Technical Summary

Problems solved by technology

This requires workers to heat up the mold before production starts, which may take two to three hours. This not only makes workers need to come to work in the factory two to three hours in advance, but also increases the labor intensity of workers and improves In addition, due to the high temperature required during production, it may cause harm to the operators, and the raw materials will also produce some harmful substances under the high temperature reaction, which is not environmentally friendly.