Compared with other materials, plastics have the following performance characteristics:
1.weight Plastic is a lighter material with a relative density of between 0.90 and 2.2. Is it obvious that plastic can float on the water? In particular, foamed plastics, because of the micro-pores inside, the texture is lighter, the relative density is only 0.01.
This feature allows plastics to be used in product production that requires weight loss.
2.Excellent chemical stability Most plastics have good corrosion resistance to acids, alkalis and other chemical substances. In particular, known as the Plastic King of PTFE (F4), its chemical stability even more than gold, placed in "Aqua regia" in the boiling for more than 10 hours will not spoil. Due to its excellent chemical stability, F4 is an ideal corrosion resistant material.
such as the F4 can be used for conveying corrosive and viscous liquid piping materials.
3.Excellent electrical insulation properties Ordinary plastic is a bad conductor of electricity, its surface resistance, volume resistance is very large, with a figure of up to 10,911,018 ohms. The dielectric loss angle tangent is very small due to the high breakdown voltage. Therefore, plastics in the electronics industry and the mechanical industry has a wide range of applications.
such as plastic insulated control cable.
4.Bad conductor of heat, has the function of silencing and damping
Generally speaking, the thermal conductivity of plastic is relatively low, the equivalent of steel 1/75-1/225, Styrofoam micro-hole. Contains gas, its heat insulation, noise, shock resistance is better. such as polyvinyl chloride (PVC) thermal conductivity is only 1/357 of the steel, aluminum 1/1250. In the heat insulation capacity, single glass window than single glass aluminum window 40%, double glass height 50%.
The plastic form and insulating glass together, in residential, office buildings, wards, hotels, use in the winter to save heating, summer savings in air-conditioning expenses, the benefits are very obvious.
5.Wide distribution of mechanical strength and higher specific strength Some of the plastic hard such as stone, steel, some soft such as paper, leather; from the plastic hardness, tensile strength, elongation and impact resistance and other mechanical properties, a wide range of distribution, there is a great choice of use. Because of the small proportion of plastic, strong strength, and thus has a higher specific strength. Compared with other materials, plastic also has obvious shortcomings, such as easy to burn, stiffness is not as high as metal, aging resistance is poor, not heat resistance and so on.
Related Industry Knowledge
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