Use PTFE Fine Powder to Produce Seal Tapes
PTFE seal tapes-PTFE Fine Powder(DF201/DF203)
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: It has the smallest friction coefficient among plastics and is an ideal oil-free lubricating material.
Non-sticky surface: None of the known solid materials can adhere to the surface. It is a solid material with the smallest surface energy.
Atmospheric aging resistance, radiation resistance and low permeability: long-term exposure to the atmosphere, the surface and performance remain unchanged.
Chemical resistance and weather resistance Except for molten alkali metals, PTFE is hardly corroded by any chemical reagents. For example, boiled in concentrated sulfuric acid, nitric acid, hydrochloric acid, or even in aqua regia, its weight and performance have no change, and it is almost insoluble in all solvents, only slightly soluble in all alkanes (about 0.1g/100g) above 300 ℃. PTFE is non-hygroscopic, 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 a very low surface energy.
Incombustibility: The oxygen limit index is below 90.
Its friction coefficient is extremely small, only 1/5 of polyethylene, which is an important feature of the perfluorocarbon surface. Because the intermolecular force of the fluorine-carbon chain is extremely low, polytetrafluoroethylene is not sticky.
PTFE maintains excellent mechanical properties over a wide temperature range of -196 to 260°C. One of the characteristics of perfluorocarbon polymers is that they do not become brittle at low temperatures.
PTFE has a low dielectric constant and dielectric loss in a wide frequency range, and its breakdown voltage, volume resistivity and arc resistance are high.
Teflon has poor radiation resistance (104 rads). It is degraded after high-energy radiation, and the electrical and mechanical properties of the polymer are significantly reduced.