PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Polytetrafluoroethylene (PTFE) Characteristics Introduction
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2022-12-26
Visits:
Polytetrafluoroethylene, English name: Polytetrafluoroethylene, referred to as FTFE or F4. Polytetrafluoroethylene is a polymer of tetrafluoroethylene. PTFE (Teflon or
PTFE), commonly known as "Plastic King", was invented in 1938 by Dr. Roy Joseph Plunkett of DuPont. DuPont was registered in 1945.
Teflon.®(Teflon®) trademark and commercial production.
The F atoms in PTFE molecules cover C- C bonds and C- F bonds are particularly stable. It is not attacked by any chemicals except alkali metals and fluorine elements.
The F atom in the PTFE molecule is symmetrical, the two elements in the C- F are covalently combined, there is no free electron in the molecule, and the whole molecule is neutral. PTFE has excellent dielectric properties
Can. As a result of PTFE molecules outside a layer of inert fluorine-containing shell, so that it has outstanding non-stick performance and low coefficient of friction.
Dankai PTFE has outstanding excellent comprehensive performance, high temperature resistance, corrosion resistance, non-stick, self-lubricating, excellent dielectric properties, very low coefficient of friction. Add in PTFE
Into any filler that can withstand the sintering temperature of PTFE, its mechanical properties can be greatly improved. At the same time, other excellent properties of PTFE are maintained. Filled varieties have glass
Fiber, metal, metal oxide, graphite, molybdenum disulfide, carbon fiber, polyimide, EKONOL, etc., wear resistance, limit PV value can be increased by 1000 times.
PTFE has excellent chemical stability, corrosion resistance, sealing, high lubrication and non-stick, electrical insulation and good anti-aging endurance. Can be used at 250 ℃ to -180 ℃
The temperature of long-term work, in addition to molten metal sodium and liquid fluorine, can withstand all other chemicals, boiling in aqua regia also can not change.
PTFE engineering plastics can be made into PTFE tubes, rods, belts, plates, films, etc. Generally used in high performance requirements of corrosion-resistant pipes, vessels, pumps, valves and systems.
Radar, high-frequency communication equipment, radio equipment, etc. The dispersion can be used as an insulating immersion liquid for various materials and as an anti-corrosion coating on the surface of metal, glass and pottery. All kinds of poly four
Fluorine ring, PTFE gasket, PTFE packing, etc. are widely used in various types of anti-corrosion pipeline flange sealing. In addition, it can also be used for drawing silk, PTFE fiber-fluoron (foreign
trade name Teflon).
PTFE has been widely used in chemical, mechanical, electronic, electrical, military, aerospace, environmental protection and bridge industry.
Figure 1: PTFE tube Source: Dankai
The characteristics of Dan Kai PTFE-PTFE mainly have the following aspects:
1. high temperature: the use of working temperature can reach 260 ℃.
2. low temperature resistance: it has good mechanical toughness, even if the temperature drops to -196 ℃, it can maintain 5% elongation.
3. non-toxic: with physiological inertia, as artificial blood vessels and organs long-term implantation in the body without adverse reactions.
4. mechanical properties, no adhesion: smooth anomaly, even ice than it, is the smallest surface tension in solid materials, does not adhere to any substance. It has a very small coefficient of friction,
It is only 1/5 of that of polyethylene, which is an important feature of the perfluorocarbon surface. And because of the fluorine-carbon chain intermolecular force is very low, so the polytetrafluoroethylene has no viscosity.
Excellent 5. insulation performance: a thick layer of newspaper film is enough to resist 1500V high voltage.
6. resistance to chemical corrosion and weather resistance: In addition to molten alkali metal, PTFE is almost not subject to any chemical corrosion. For example, in concentrated sulfuric acid, nitric acid, hydrochloric acid, and even in
When boiled 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 ℃.
7. excellent weather resistance: no moisture absorption, non-flammable, oxygen, ultraviolet light are extremely stable, have the best aging life in plastic.
8. electrical properties: PTFE in a wide frequency range of dielectric constant and dielectric loss are very low, and the breakdown voltage, volume resistivity and arc resistance are high.
9. radiation resistance: PTFE radiation resistance is poor (104 rad), caused by high-energy radiation degradation, polymer electrical properties and mechanical properties are significantly lower
Drop.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
Polytetrafluoroethylene, ptfe, with, excellent, radiation, friction coefficient, high and low temperature resistance, insulation, corrosion resistance, weather resistance, sealing, high lubrication
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