Plastic performance characteristics

- May 07, 2018-

Compared with other materials, plastic box plastics have the following characteristics:


1. Light weight


Plastics are lighter materials with relative densities ranging from 0.90 to 2.2. Obviously, can plastics float to the surface? In particular, foamed plastics have micropores and a lighter texture with a relative density of only 0.01. This property allows plastics to be used in the production of products that require reduced weight.


2. Excellent chemical stability


The vast majority of plastics have good corrosion resistance to acids, alkalis and other chemical substances. Especially known as the plastic king of PTFE (F4), its chemical stability is even better than gold, put in "aqua regia" cook for more than a dozen hours will not degenerate. Due to its excellent chemical stability, F4 is an ideal corrosion resistant material. For example, F4 can be used as a material for conveying corrosive and viscous liquid pipes.


3. Excellent electrical insulation


Ordinary plastic is a bad conductor of electricity, its surface resistance, volume resistance is very large, with a digital representation up to 109-1018 ohms. The breakdown voltage is large and the dielectric loss tangent is small. Therefore, plastic has a wide range of applications in the electronics industry and machinery industry. Such as plastic insulated control cables.


4. Thermally poor conductors with sound and vibration damping


In general, the thermal conductivity of plastic is relatively low, equivalent to 1/75—1/225 of steel, and the micropores of foam.


It contains gas, which has better thermal insulation, sound insulation, and shock resistance. For example, the thermal conductivity of polyvinyl chloride (PVC) is only 1/357 of steel and 1/125 of aluminum. In terms of thermal insulation, the single glass window is 40% higher than the single glass window and the double glass is 50% higher. Combining the plastic form with the hollow glass, it can be used in houses, office buildings, wards, and hotels. It saves heating in the winter and saves air-conditioning expenses in the summer. The benefits are obvious.


5. Wide distribution of mechanical strength and high specific strength


Some plastics are hard, such as stones and steels, and some are soft, such as paper and leather. From the perspective of the mechanical properties of plastics such as hardness, tensile strength, elongation, and impact strength, the distribution range is wide, and there is a great deal of choice in use. Due to its small specific gravity and high strength, plastics have a high specific strength. Compared with other materials, plastics also have obvious shortcomings, such as flammability, stiffness, inferiority to metal, poor aging resistance, and heat resistance.




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