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The plastics that we often use isn't a pure substance. It is made by the preparation of many supplies, in which the high polymer (or artificial resin) is its primary component. In addition, to be able to enhance the efficiency of plastics, a wide range of auxiliary materials should also be added in the polymer, akin to fillers, plasticizers, lubricants, stabilizers, coloring brokers, and so forth, in order to make the plastics have good performance.

First, artificial resin
Artificial resin is the primary element of plastics. The overall content of artificial resin in plastics is from 40% to a hundred%. Because of its giant content material, the nature of synthetic resin usually determines the character of the plastics, so folks usually take resin as a synonym of plastics. The truth is, resin and plastics are two different concepts. Resin is a uncooked polymer manufacturer which has not been processed. While for many plastics, besides the resin as its major element, there are additionally another substances.

Second, fillers
Fillers can improve the power and warmth-resistant high quality of the plastics, as well as decrease the cost. For example, adding wood flour into phenolic resin can greatly reduce the cost, which makes the phenolic plastic as one of the cheapest plastics. On the similar time, it could additionally significantly improve the mechanical strength. Fillers might be divided into natural filler and inorganic filler, with the previous as wood flour, rags, paper and all types of textile fibers, and the latter as glass fibers, diatomaceous earth, asbestos, and carbon black.

Third, plasticizers
Plasticizers can improve the plasticity and suppleness of the plastics, reduce brittleness, and make the plastics simple to be processed and molded. Plasticizers are usually organic compounds with high boiling level, miscible with the resin, non-poisonous, odorless, and stable to light and heat. The generally used plasticizers include phthalates, benzophenone, and so on.

Fourth, stabilizers
With the intention to forestall the decomposition and damage of artificial resin caused by light and heat, and to increase its service life, it's essential to add stabilizers in plastics. The commonly used stabilizers include stearate, epoxy resin and so on.

Fifth, coloring brokers
Coloring agents can provide the plastics with varied vibrant and beautiful colors. Organic dyes and inorganic pigments are sometimes used as coloring agent.

In addition to the above additives, different additives can also be added in plastics, corresponding to lubricants, flame retardants, blowing agents, antistatic brokers, and so forth, so as to fulfill totally different working requirements.

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