FluoroplasticsThe characteristics of the detailed introduction.

Fluoroplastics have heat resistance, cold resistance, weather resistance, drug resistance, solvent resistance, excellent insulation properties and high frequency electrical properties. And has the characteristics of non-withering, self-lubricating, low friction coefficient and so on.

Polytetrafluoroethylene, perfluoro (ethylene-propylene) copolymer (FEP) is entirely composed of carbon atoms and fluorine atoms, and polyvinylidene fluoride, ethylene (PVDF), polyvinyl fluoride (PVF) molecules also contain hydrogen atoms, poly three

Fluorovinyl chloride also contains ammonia atoms. The excellent performance of fluoroplastics is achieved by the high binding energy between carbon atoms and fluorine atoms. The main chain skeleton of PTFE is carbon atoms, and the surrounding is completely surrounded by fluorine atoms, so

Its various properties * high, and PFA. FEP. ETFE and other varieties due to the influence of side groups, low softening point sub-PTFE, other properties have also changed.

1. Thermal performance: Fluoroplastics have flame retardant and excellent heat resistance. The continuous use temperature of PTFE and PFA can reach 260°C, and the short-term use can be at 300°C. FEP is used at a lower temperature than them.

60°C. The "high" of PCTFE can be used at 120°C. Fluoroplastics such as long-term use at high temperatures will lead to changes in crystallinity, especially when manufacturing equipment lining.

2. Drug resistance: Fluoroplastics have excellent drug resistance and solvent resistance, especially PTFE, PFA, FEP, etc. Acid and alkali solvents have no erosion to them. But molten alkali metals, fluorotrifluoramine

Hydrocarbons have different degrees of influence on them. PCTFE, ETFE, PVDF, etc. are slightly less resistant to chemicals in fluoroplastics, but their corrosion resistance is much better than other plastics.

Electrical properties: The electrical properties of fluoroplastics, especially high-frequency electrical properties, are difficult to match with other materials. The polarity of PTFE, FEP. PFA molecules is very low, and it changes very well in a wide range of temperature and frequency.

Small relative dielectric constant stability, low dielectric loss, excellent electrical insulation. Among them, PVDF also has specific piezoelectric and pyroelectric properties, which can be used to manufacture piezoelectric materials.

4. Mechanical properties: The tensile strength of fluoroplastics is also improved when hydrogen-containing ammonia atoms increase. PTFE and PCTFE have extremely low embrittlement temperatures and exhibit excellent low temperature properties. PTFE has * low

coefficient of friction and specific self-lubrication. However, PTFE has its own shortcomings such as large wear and cold flow. Various fillers can be used to improve wear resistance. Overcome cold flow.

5. non-sticky: fluorine plastic has a specific non-sticky. Especially like PTPE, FEP, PFA and other molecules of high fluorine content, the surface contact angle is very large, so that the surface of the fluorine plastic products on the surface of the liquid into a spherical. No.

It is easy to bond with resin, so it is commonly used to make non-stick layers on the surface of cookware.

6. Weather resistance: all kinds of fluoroplastics have excellent weather resistance, even in the harsh temperature of long-term exposure, its various properties have not changed.

Hydrophobicity: Fluoroplastics have low water absorption, especially PTFE. It can be used to make breathable impermeable composite fabrics and other equipment.