Preparation of an environmentally friendly water-foamed polypropylene masterbatch and its extruded micro-foamed sheet

Abstract

The invention discloses an environment-friendly water foamed polypropylene master batch which is prepared from the following materials in parts by weight: 5-10 parts of modifier, 5-10 parts of LDPE (low-density polyethylene), 30-60 parts of microporous water-absorbing inorganic foaming material, 0.01-0.2 part of initiator, 1-3 parts of surfactant and 0.1-0.5 part of plastic antioxidant. The modifier is one or more of ethylene-vinyl acetate copolymer, ethylene-propylene rubber, ethylene propylene diene copolymer, SBS (styrene-butadiene-styrene), polybutene and POE (polyolefin elastomer). The polypropylene low-ratio foamed sheet has the characteristics of excellent comprehensive mechanical properties, favorable heat resistance, environment friendliness, high recoverability and the like, can substitute the polyethylene and polystyrene low-foaming products used at present, is applicable to the fields of automobiles, packaging, buildings and the like, and implements the functions of weight reduction, energy saving and environment friendliness.

Description

technical field [0001] The invention relates to the field of environmentally friendly new materials, and more specifically relates to an environmentally friendly water-foamed polypropylene masterbatch and an extruded micro-foamed sheet prepared therefrom. Background technique [0002] In the field of foamed plastics, expanded polypropylene is an environmentally friendly new type of pressure-resistant cushioning and heat-insulating foam with advanced comprehensive performance. It has the advantages of excellent mechanical properties, shock-resistant energy-absorbing properties, high recovery rate after deformation and high heat-resistant temperature. It can be widely used in automobile heat insulation materials and cushioning energy-absorbing parts. Parts such as bumper bumper, roof, dashboard lining, door panel lining, shelf, tail box and helmet have become multi-purpose lightweight automotive materials. At present, the foaming methods of polypropylene mainly include extrus...

AI Technical Summary

Problems solved by technology

[0003] In the above-mentioned existing disclosed foamed polypropylene sheet or plate and production method, the chemical foaming agent will produce toxic by-products during the reaction, which will affect the quality of the product.

The cost of physical foaming agent is low, and there is no residue in foaming, but the equipment used in the foaming process is more expensive than chemical foaming. The safety protection and fire-fighting configuration, some of which have a destructive effect on the ozone layer in the atmosphere; CO 2 Blowing agents cause the greenhouse effect