Performance characteristics of plastic products

1. Lightweight

Plastic is a relatively lightweight material with a relative density distribution between 0.90-2.2. It is evident that plastic, especially foam plastic, can float to the surface of water due to its micropores and lighter texture, with a relative density of only 0.01. This characteristic makes plastic suitable for the production of products that require weight reduction.

2. Excellent chemical stability

The vast majority of plastics have good corrosion resistance to chemicals such as acids and alkalis. Especially for polytetrafluoroethylene (F4), commonly known as the plastic king, its chemical stability is even better than gold, and it will not spoil even after being boiled in "aqua regia" for more than ten hours. Due to its excellent chemical stability, F4 is an ideal corrosion-resistant material. F4 can be used as a material for pipelines transporting corrosive and viscous liquids.

3. Excellent electrical insulation performance

Ordinary plastics are poor conductors of electricity, with high surface resistance and volume resistance, which can reach 109-1018 ohms when represented by numbers. The breakdown voltage is high, and the tangent value of the dielectric loss angle is very small. Therefore, plastics have a wide range of applications in the electronics and machinery industries. Like plastic insulated control cables.

4. Poor conductor of heat, with noise reduction and shock absorption effects

Generally speaking, the thermal conductivity of plastics is relatively low, equivalent to 1/75-1/225 of steel, and the micropores of foamed plastics.

It contains gas, which has better insulation, sound insulation, and shock resistance. The thermal conductivity of polyvinyl chloride (PVC) is only 1/357 of steel and 1/1250 of aluminum. In terms of insulation capacity, single glass plastic windows are 40% higher than single glass aluminum windows, and double glass windows are 50% higher. After combining plastic windows with insulated glass, it can be used in residential buildings, office buildings, wards, and hotels to save heating costs in winter and air conditioning expenses in summer, with significant benefits.

5. Wide distribution of mechanical strength and high specific strength

Some plastics are as hard as stone or steel, while others are as soft as paper or leather; From the perspective of mechanical properties such as hardness, tensile strength, elongation, and impact strength of plastics, they have a wide distribution range and a lot of room for selection. Due to its low specific gravity and high strength, plastic has a high specific strength. Compared with other materials, plastic also has obvious disadvantages, such as easy combustion, lower stiffness than metal, poor aging resistance, and heat resistance.