Compared with other plastic material characteristics

Plastics and other materials compared with the following characteristics of several aspects:
1, light weight
Plastic is lighter materials, the relative density distribution between 0.90-2.2. Obviously, the plastic can not float to the surface? Especially foamed plastic, because the micropores, lighter weight, the relative density of only 0.01. This feature can be used to make plastic products claim to reduce the weight of the production.
2, excellent chemical stability
The vast majority of plastic to acid, alkali and other chemicals have good corrosion resistance. In particular, commonly known as the king of plastic polytetrafluoroethylene (F4), its chemical stability even better than gold, on the "aqua regia" cook for ten hours will not degenerate. Since F4 has excellent chemical stability, corrosion-resistant material is ideal. As F4 can be used as material handling corrosive and viscous liquids pipelines.
3, excellent electrical insulation properties
Ordinary plastic is a poor conductor of electricity, surface resistance, volume resistance is large, with a 1018 number represents up to 109 ohms. Large breakdown voltage, dielectric loss tangent is small. Thus, the plastic in the electronics industry and machinery industry has been widely used. Plastic insulated control cable.
4, poor conductor of heat, with a silencer, damping effect
In general, the thermal conductivity of plastic is relatively low, the steel equivalent to 1 / 75-1 / 225, porous foam
Containing gas, its heat insulation, sound insulation, shock better. Such as polyvinyl chloride (PVC) thermal conductivity is only 1/357 of steel, aluminum 1/1250. On the insulation capacity, single glass plastic window 40% higher than single glass aluminum windows, double glazing 50% higher. After the plastic window and insulating glass combine in homes, offices, wards, hotel use, save winter heating and summer air conditioning costs savings, the benefits are clear.
5, mechanical strength, wide distribution and high specific strength
Some plastic hard as stone, steel, and some soft as paper, leather; from the mechanical properties of plastics hardness, tensile strength, elongation and impact strength, the wide distribution, there is a great choice to use. Due to the small proportion of plastics, strength, which has a high specific strength. Compared with other materials, plastics are also obvious shortcomings, such as flammable, high stiffness better than metal, aging resistance poor, no heat and so on.

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