What are the properties of raw meal


Chemical properties Insulation: not affected by the env […]

Chemical properties
Insulation: not affected by the environment and frequency, the volume resistance can reach 1018 ohm·cm, the dielectric loss is small, and the breakdown voltage is high.
High and low temperature resistance: little change in temperature, wide temperature range, usable temperature -190~260℃.
Self-lubricating property: It has a very small friction coefficient among plastics, and is an ideal oil-free lubricating material.
Surface non-stick: None of the known solid materials can adhere to the surface, and it is a solid material with very little surface energy.
Atmospheric aging resistance: radiation resistance and low permeability: long-term exposure to the atmosphere, the surface and performance remain unchanged.
Corrosion resistance: chemical resistance and weather resistance In addition to molten alkali metals, PTFE is hardly corroded by any chemical reagents. For example, when boiled in concentrated sulfuric acid, nitric acid, hydrochloric acid, or even in aqua regia, its weight and properties are unchanged, and it is almost insoluble in solvents, only slightly soluble in peralkanes (about 0.1g/100g) above 300 °C. PTFE is non-moisture, non-flammable, and extremely stable to oxygen and ultraviolet rays, so it has excellent weather resistance.



Physical properties
The mechanical properties of PTFE are relatively soft. Has very low surface energy.
In practical applications, many liquid raw material belts are used to replace solid raw material belts. Liquid raw material has the characteristics of high bonding strength, good sealing performance, corrosion resistance, high temperature resistance and aging resistance in pipeline thread sealants. Precision filter device , Fast installation, is the most advanced thread sealant at present. It is used for thread sealing and locking of industrial and civil pipelines such as fire protection, shipbuilding, natural gas, tap water, instruments, air conditioners, gas pipes, oil pipes, hydraulic pipes, etc.
Incombustibility: The oxygen limit index is below 90.

Mechanical properties
Its friction coefficient is extremely small, only 1/5 of polyethylene, which is an important feature of perfluorocarbon surface. And because the fluorine-carbon chain intermolecular force is extremely low, PTFE is not sticky.
Temperature resistance: PTFE maintains excellent mechanical properties in a wide temperature range from -196 to 260 °C. One of the characteristics of perfluorocarbon polymers is that it does not become brittle at low temperatures.
Electrical properties: PTFE has low dielectric constant and dielectric loss over a wide frequency range, and high breakdown voltage, volume resistivity and arc resistance.

Radiation resistance
The radiation resistance of PTFE is poor (104 rad), and it is degraded by high-energy radiation, and the electrical and mechanical properties of the polymer are significantly reduced.