Plastic additives, also known as plastic additives, are some of the compounds that must be added to improve the processing properties of polymers (synthetic resins) during molding or to improve the properties of the resin itself.
For example, in order to reduce the molding temperature of the polyvinyl chloride resin, the plasticizer added to soften the product; and to add a foaming agent for the preparation of a lightweight, vibration-resistant, heat-insulating, sound-insulating foam; some plastic heat The decomposition temperature is very close to the molding processing temperature and cannot be formed without the addition of a heat stabilizer. Therefore, plastic additives occupy a particularly important position in plastic molding processing.
A large class of additives for plastic molding products, including plasticizers, heat stabilizers, antioxidants, light stabilizers, flame retardants, foaming agents, antistatic agents, mildew inhibitors, colorants and additives. Whitener (see pigment), filler, coupling agent, lubricant, mold release agent, etc. Among them, coloring agents, whitening agents and fillers are not plastic-specific chemicals, but are commonly used as matching materials.
Plastic additives have been gradually developed after the industrialization of polyvinyl chloride. After the 1960s, due to the rise of petrochemical industry, the plastics industry developed rapidly, and plastic additives have become an important chemical industry. According to the differences in the composition of plastics and the use of plastics in various countries, the consumption of plastic additives is about 8% to 10% of the output of plastics. Today, plasticizers, flame retardants and fillers are the most widely used plastic additives.
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