Thursday, April 15, 2021

Plastic materials and their characteristics

      Plastic materials refer to materials that use polymer synthetic resin as the main component, have plasticity and fluidity at a certain temperature and pressure, can be molded into a certain shape, and keep the shape unchanged under certain conditions. Commonly used plastic materials are divided into thermosetting plastic materials and thermoplastic plastic materials. Thermosetting plastic materials are characterized by being able to solidify into insoluble materials under heat or other conditions. Thermoplastic materials are characterized by repeated heating to soften or cooling to solidify within a specific temperature range. In terms of performance, plastic machining service have the advantages of light weight, good strength, corrosion resistance, good insulation, easy coloring, products can be processed into any shape, high production efficiency, and low price.

      The versatility of the application of plastic materials is inseparable from its own characteristics. The composition characteristics of plastic materials are introduced below.

(1) Molecular structure of plastic materials

The main component of plastic machining  is resin. There are two types of resin, natural resin and synthetic resin.

(2) Composition of plastic materials

Resin: The main function is to bond other components of the plastic material and determine the main properties of the plastic material, such as mechanical, physical, electrical, and chemical properties. The proportion of resin in plastic materials is generally 40% to 65%.

Filler: also known as filler. Correct choice of filler can improve the performance of the plastic material and expand its scope of use.

Plasticizer: Some resins have very little plasticity and poor flexibility. In order to reduce the melt viscosity and melting temperature of the resin, improve its molding processing performance, improve the flexibility, elasticity and other necessary properties of plastic materials, usually Add a non-volatile high-boiling organic compound that is compatible with the resin. Such substances are called plasticizers.

Coloring agent: also known as coloring material, mainly for aesthetics and decoration, including paint part.

Stabilizer: Any substance that can delay the deterioration of plastic materials is called stabilizer, light stabilizer, heat stabilizer and antioxidant.

Lubricant: improve the fluidity of plastic material melt, reduce or avoid friction and adhesion to equipment or molds, and improve the surface finish of Plastic Machining Parts.


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