The main performance characteristics of plastic

Views: Date:2013-10-22

Compared with other plastic materials, are the following performance characteristics.
1. Light weight
Plastic is lighter materials, the relative density between the 0.90-2.2. It is clear that plastic can float to the surface? In particular, foam plastic, because there are porous, lighter weight, the relative density is only 0.01. This feature makes the plastic can be used to reduce the weight of the product requirements of the production.
2. Excellent chemical stability
Most of the plastic to acid, alkali and other chemicals have good corrosion resistance. In particular, commonly known as the king of PTFE plastic (F4), its chemical stability even better than gold, and on the "aqua regia" in a dozen hours to cook and will not degenerate. Since F4 has excellent chemical stability, corrosion-resistant material is ideal. If F4 can be used as corrosive and viscous liquid pipeline transportation of materials.
3. Excellent electrical insulation properties
General Plastics is a poor conductor of electricity, the surface resistance, volume resistance large number that can reach 109 with a 1018 ohms. Large breakdown voltage, dielectric loss tangent is very small. Therefore, the plastic in the electronics industry and machinery industry has a wide range of applications. Such as plastic insulated control cables.
4. Poor conductor of heat with a silencer, damping effect
In general, the plastic is relatively low thermal conductivity, the equivalent of steel 1/75-1/225, porous foam containing gas, heat, noise, vibration and better. Such as polyvinyl chloride (PVC) thermal conductivity of steel is only 1 / 357, aluminum, 1 / 1250. The ability of the insulation, single-glass windows than the single plastic window glass is 40%, 50% higher Shuangbo. The plastic form with the insulating glass combined, in the residential, office, hospital, hotel used in the winter to save heating and summer air conditioning cost savings, the benefits are obvious.
5. Wide distribution and high mechanical strength, specific strength
Some plastic hard as stone, steel, and some soft, such as paper, leather; from the plastic hardness, tensile strength, elongation and impact strength and other mechanical properties to see wide distribution, there is great use of choice. Due to the small proportion of plastic, strength, and thus has a higher specific strength. Compared with other materials, plastic also has the obvious disadvantages, such as flammable, as the metal of high stiffness, resistance to aging of the poor, do not heat and so on.

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