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Plastic Key Features: Most plastic light, chemical stability, will not rust; good impact resistance; has good transparency and abrasion resistance; good insulation, low thermal conductivity; general formability, good color low processing cost; most plastic poor heat resistance, thermal expansion coefficient, easy combustion; dimensional stability is poor, easily deformed; most plastic poor low-temperature resistance, low temperature brittle; easy aging; some plastics soluble in the solvent.

Plastics can be divided into two types of thermoset and thermoplastic, the former can not be re-shape to use, which can be repetitive.

A plastic polymer structure, there are two basic types: the first is a linear structure, a polymer compound having such a structure is called a linear polymer compound; second is body structure, a high molecular compound having such a structure Body called polymers. Some branched polymer, called a branched polymer, is linear structure. Although some macromolecule intermolecular crosslinking, but less crosslinking, called network structure, body structure belongs.

Two different structures: exhibits two opposing properties. Linear structure (including branched structures) polymer due to the presence of a separate molecule, it is flexible, malleable, can be dissolved in a solvent, heating can be melted, the hardness and brittleness of smaller features. Since there is no independent body structure of polymer macromolecules exist, so there is no elasticity and plasticity, can not dissolve and melt only swelling, hardness and brittleness. Polymer plastic the two structures are, the linear polymer is made of thermoplastic polymer made by the body is a thermosetting plastic.

Advantages of plastic: Corrosion resistance of most plastics, strong acids, alkali reaction does not. Plastics manufacturers’ costs low. Plastics are easy to be molded into different shapes. It is a good insulator. Plastics can be used in the preparation of fuel oil and fuel gas, which can reduce oil consumption. Has so many advantages, more and more clear plastic box also been favored because of its practicality, durable and water proof.