Abstract
According to the composition of substances, release agent can be divided into organic and inorganic two types, inorganic release agent includes mica powder, graphite powder, etc., organic release agent mainly includes organic silicon, organic fluorin. According to the service life, release agent can be divided into one-time release agent and semi-permanent release agent. This paper introduced several kinds of releasing agent, summarized and analyzed the advantages of semi-permanent release agent and the present situation of domestic and foreign research, and prospected the future of release agent.
Highlights
China is a major producer and consumer of plastic and rubber industry
In order to meet the requirements of social industry progress, and improve the technical problems of methyl silicone oil release agent instability, it is necessary to reform the structure of organic silicon compound, to obtain more excellent and complete performance
Compared with other types of release agent, semipermanent release agent will form a chemically stable and heat-resistant crosslinking film on the surface of the mold, because this crosslinking film is difficult to be decomposed, so semi-permanent release agent has the following advantages[40, 42, 44, 45]: (1) In the demoulding process of vulcanized rubber products, the pollution of the mold caused by the migration of paraffin series release agent is avoided
Summary
China is a major producer and consumer of plastic and rubber industry. Since 2010, the annual production of plastic and rubber has exceeded 60 million tons, ranking first in the world in both annual production and consumption capacity. Because of the existence of silicon-oxygen bond in its molecular structure, the bond energy and bond angle of organosilicon compound in the organosilicon demoulding agent are larger It has high and low temperature resistance, radiation resistance, oxidation resistance, low surface tension, hydrophobicity, electrical insulation and other characteristics. Release agent can reduce the product and mold peeling force to decrease product demoulding difficulty, and protect the product and mold surface. It plays an irreplaceable role in the vulcanization of rubber products
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