Preparation method of rubber foaming material with bubble inner wall shell

Abstract

The invention relates to a preparation method of a rubber foaming material with a bubble inner wall shell. In order to improve the dimensional stability of the rubber foam material, a thermoplastic polymer and inorganic particles (including spheres, rods and sheets) are usually added into a foam matrix to construct a scaffold structure for hindering molecular chain recovery; since the rigid strength of the thermoplastic polymer that can be processed and foamed together with rubber is insufficient to solve the problem of its dimensional stability. A large number of inorganic particles are introduced, so that the mechanical property of the foaming material is reduced, and meanwhile, organic modification needs to be carried out, which brings difficulty to industrial production. According to the invention, styrene butadiene rubber and an ethylene-vinyl acetate copolymer are used as foaming matrixes, and a small amount of epoxy resin is introduced to regulate and control zinc oxide to be compactly and uniformly dispersed on the inner walls of bubbles to form a layer of inner shell structure; the size stability and the mechanical property of the foaming material are enhanced.

Description

technical field [0001] The invention relates to the preparation of a high-performance rubber foam material, in particular to a preparation method of a rubber foam material with bubble inner walls and shells. Background technique [0002] Rubber foam materials have the characteristics of low cost, light weight, high elasticity, softness and durability, and are widely used in industries such as sporting goods, soft decoration, construction and thermal insulation. Due to the inherent elasticity and low rigidity of rubber, its dimensional stability after foaming is poor. For example, the size of the product prepared in industrial production is 100*100cm, due to the high shrinkage rate, its size becomes 9*9cm, which will greatly reduce the yield and increase the cost. It has been found through research that the low dimensional stability of rubber foamed materials is caused by its difficulty in crystallization and the internal stress caused by stretched molecular chains and rapid...

AI Technical Summary

Problems solved by technology

Since the rigid strength of thermoplastic polymers that can be processed and foamed with rubber is not enough to solve the problem of dimensional stability

However, the introduction of a large number of inorganic particles reduces the mechanical properties of foamed materials, and organic modification must be carried out at the same time, which will bring difficulties to industrial production.

Images