The difference between PVC and TPE
The difference between polyvinyl chloride (PVC) and TPE material is mainly the following 7 points:
1. Structural differences: tpe: hydrocarbon polymer; pvc: hydrocarbon polymer containing chlorinated hydrocarbons.
2. The difference in specific gravity: tpe: the specific gravity is 0.84-1.4, which is lighter; pvc: the specific gravity is generally between 1.2-1.4.
3. The difference in hardness: TPE hardness range: 0A-60D wide hardness range; soft PVC material hardness is 50A-90A.
4. Differences in mechanical properties: TPE: has excellent tensile resistance, tensile strength up to 12 MPa, elongation at break up to 10 times, high mechanical strength; PVC: high mechanical strength.
5. Differences in temperature resistance: TPE’s long-term temperature resistance can reach more than 70℃, the maximum operating temperature is 100℃, and it can still maintain good shape at low temperatures of -40℃; PVC material can withstand low temperatures of -15℃-60℃, light and heat It has poor stability. In an environment above 100℃ or in a light environment, the softening point of the material can be lowered to 80℃. It will decompose in a high temperature environment of 130℃ and precipitate hydrogen chloride, an irritating gas.
6. Differences in chemical resistance: TPE is resistant to corrosion, ozone, and ozone aging (38°C). The performance drops below 10% in 100 hours. It is resistant to water, acid, alkali, alcohol and other solvents, and can be immersed in solvents or oil for a short period of time; PVC has high chemical resistance and corrosion resistance, but it is not resistant to ozone. It is a strong acid, such as concentrated sulfuric acid and concentrated nitric acid, and cannot be in contact with aromatic hydrocarbons and chlorinated hydrocarbon substances.
7. Differences in combustion: TPE: This material does not contain halogens, burns with low smoke and is non-toxic, and emits fragrance when burned; PVC releases a large amount of smoke and releases irritating gases.