PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Features of PTFE and FEP
Classification:
Industry dynamics
Author:
FEP tube little sister
Source:
FEP tube little sister
Release time:
2004-08-29
Visits:
1. PTFE
Trade names "Teflon", "Teflon", "Teflon", "Teflon", "4F", etc. PTFE is a perfluoropolymer prepared by free radical polymerization of tetrafluoroethylene. It has a linear molecular structure of a CF2 = CF2 repeating unit. It is a crystalline polymer with a melting point of about 631 ℃ and a density of 2.13-2.19g/cc (g/cm3). PTFE has excellent chemical resistance, a dielectric constant of 2.1, a low loss factor, and is stable over a wide range of temperatures and frequencies. It has good mechanical properties from low temperature to 550V.
PTFE has high impact strength, but its tensile strength, wear resistance and creep resistance are worse than other engineering plastics. Glass fiber, bronze, carbon and graphite are sometimes added to improve their special mechanical properties. It has a lower coefficient of friction than almost any other material and a high oxygen index.
PTFE can be prepared as pellets, coagulated fine powders (0.2 microns) and aqueous dispersions. Granular resins are used for compression molding and plunger extrusion; fine powders can be paste extruded into thin-walled materials; dispersions can be used as coatings and impregnated porous materials.
PTFE has a very high melt viscosity, which prevents the use of conventional melt extrusion or molding techniques. The molding and extrusion methods of granular PTFE are similar to those used for powdered metals and ceramics-first compression and then high-temperature sintering; The fine powder needs to be mixed with processing accessories (such as naphtha) to form a paste, then extruded into thin-walled materials under high pressure, then heated to remove volatile processing aids, and finally sintered.
Figure 1:PTFE Tube Source: Shenzhen Dankai
2. polyethylene glycol propylene
FEP is a copolymer of tetrafluoroethylene and hexafluoropropylene.
FEP has a crystalline melting point of 580 °F and a density of 2.15g/cc (grams per cubic centimeter). It is a soft plastic with lower tensile strength, abrasion resistance, and creep resistance than many engineering plastics. It is chemically inert and has a low dielectric constant (2.1) over a wide range of temperatures and frequencies. The material does not ignite and can prevent the spread of flame. It has excellent weather resistance and low coefficient of friction, and can be used from low temperature to 392 °F. The material can be made into granular products for extrusion and molding, as powders for fluidized beds and electrostatic finishes, and also into aqueous dispersions.
Semi-finished products are films, plates, rods and single fibers. Its main use is for the production of tubes and chemical equipment in the village, drum surface and a variety of wires and cables, such as aircraft hook lines, pressurized cables, alarm cables, flat cables and oil well logging cables. FEP films have been used as thin coatings for solar collectors.
Figure 2:FEP tube Source: Shenzhen Dankai
Shenzhen Dankai Technology Co., Ltd. (ShenZhen DanKai Technology Co., Ltd.), whose predecessor was the Fluoroplastic Material Factory of Dongguan Dandi Insulation Material Co., Ltd. established in 1998, specializes in the research and development, production and sales of FEP, PFA, PTFE and other fluoroplastic tube rod sheet membrane products and other insulation materials. The company has international standards of senior R & D team and the introduction of foreign fluorine plastic products production line. Some fluoroplastic products through ISO9001, SGS, FDA certification, Huawei, Foxconn, the United States, ZTE, Intel, AirTAC and other domestic and foreign cooperation customers fully affirmed. The company's main products are: ① pipes: Ptfe pipes, Fep pipes, Pfa pipes, Pvdf pipes; ② Heat shrinkable tubes: Ptfe heat shrinkable tubes, Fep heat shrinkable tubes, Pfa heat shrinkable tubes, Pvdf heat shrinkable tubes; ③ Plate rod film: Ptfe plate rod film, Feep plate rod film, Pfa plate rod film, Pvdf plate rod film, etc. PE: PE, special, spiral tube, spring tube, rotary cutting tube, welding rod, tee, straight, gasket, joint, cone rod, flared tube, sealing tube, braided tube, corrugated tube, etc. At the same time can be customized according to customer requirements processing production of various specifications of fluorine plastic products.
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