Polypropylene foaming material and preparation method thereof

Abstract

The invention discloses a polypropylene foaming material and a preparation method thereof, and belongs to the field of foaming materials. The polypropylene foaming material is prepared from the following components including, by weight, 60-80 parts of polypropylene PP resin, 5-10 parts of a foaming agent, 3-5 parts of an anti-aging agent, 1-3 parts of a diluent, 1-5 parts of a nucleating agent and2-4 parts of an antioxidant. The performance of the product is improved by adding the anti-aging agent and the antioxidant, and the exhaust rate can be automatically adjusted according to the foamingspeed in the preparation process so as to obtain the product with uniform and fine foam holes; an auxiliary plunger moves in a main plunger in the foaming process to enable a roller to rotate, then avertical rod does reciprocating motion up and down, a magnetic air blocking film is intermittently opened according to the principle that magnets with the same polarity repel each other, air is prevented from flowing back into a mold, meanwhile, an air blowing piece rotates under the action of repulsive force, the exhaust effect is further improved, and meanwhile gas backflow is prevented, so that gas generated by foaming is smoothly exhausted.

Description

technical field [0001] The invention relates to the field of foamed materials, more specifically, to a polypropylene foamed material and a preparation method thereof. Background technique [0002] With the development and progress of society, all walks of life have higher and higher requirements for plastic performance, and people are increasingly favoring materials that are environmentally friendly, safe, light in weight, and cost-effective. Polymer foam material is a resin-based material with a large number of bubbles inside the material, which can be regarded as a solid / gas composite material filled with gas. Foam materials are light in weight, high in specific strength, and have functions such as cushioning, sound absorption, and heat preservation. They are widely used in fields such as construction, automobiles, packaging, aerospace, and home appliances. [0003] Polypropylene resin has the characteristics of light weight, rich sources of raw materials, superior perfor...

AI Technical Summary

Problems solved by technology

[0004] At present, due to the different raw materials used for polypropylene copolymer foaming materials, the product performance is also different, but most of the products have less additives, resulting in poor strength and oxidation resistance of the finished product, and the current molded foaming method prepares materials. During the process, because the plunger mold cannot achieve good exhaust, there will be a lot of air bubbles after the material is formed, which greatly affects the quality of the product

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