PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Comparison of the difference between the two after the PFA tube is made into a pfa winding tape
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
PFA tube little sister
Release time:
2008-04-19
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The English name of PFA is: Polyfluoroalkoxy, and the Chinese name is: tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (also known as perfluoroalkylate, soluble polytetrafluoroethylene). The chemical properties of PFA FEP PTFE are similar, but FEP can only be used below 200 degrees, and PTFE cannot be injection molded. Specific gravity: 2.13-2.167g/cm3, molding shrinkage: 3.1-7.7%, molding temperature: 350-400 ℃.
The characteristics and main uses of PFA: PFA is commonly known as meltable PTFE, and various properties are the crown of fluorine plastics. Widely used in the semiconductor industry, as well as medical, chemical anti-corrosion, automotive and other fields.
Introduction of 2. pfa tube
The PFA tube is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. The smooth inner tube has good fluidity, has a super large flow rate, inhibits particle aggregation, the white PTFE tube is made of FDA food grade food grade hose, non-toxic material, and the sanitary hose is chemically inert and will not release odor contaminated fluid. Excellent weather resistance, not easy to burn; the surface is not sticky, easy to disinfect, steam or detergent to clean; PFA tube working pressure range:-54 ℃ ~ 232 ℃ sanitary hose. The melt cohesiveness is enhanced, the solution viscosity is reduced, and the performance is unchanged compared with PTFE. This kind of resin can be directly processed into products by ordinary thermoplastic molding methods. Suitable for the production of corrosion-resistant parts, anti-wear parts, seals, insulation and medical equipment parts, high-temperature wires, cable insulation, anti-corrosion equipment, sealing materials, pump valve bushings, and chemical containers.
PFA Features:
(1) crystalline material, moisture absorption is small. It can be processed into products through thermoplastic processing methods.
(2) Poor fluidity, easy to decompose, and corrosive gas is generated during decomposition. The molding temperature does not exceed 475 ℃, the mold is heated to 150-200 ℃, and the resistance of the gating system to the material flow is small.
(3) translucent pellets, injection molding, extrusion molding. Molding temperature 350-400 ℃,475 ℃ and above is easy to cause discoloration or blistering. Pay attention to the difficulty of demoulding.
(4) Due to the corrosive effect of molten materials on metals, long-term production requires chromium plating on the mold.
PFA tube physical properties:
1. Perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene copolymer. Compared with polytetrafluoroethylene, the properties of this resin can be directly processed by ordinary thermoforming.
2. Its creep resistance and compressive strength are better than PTFE, with high tensile strength and elongation of 100-300%. Good dielectric properties and excellent radiation resistance, high flame retardancy.
3, long-term use temperature -80-200 degrees, excellent chemical corrosion resistance, all the chemical corrosion resistance of the cushion layer, the coefficient of friction in the plastic, and good electrical performance, its electrical insulation is not affected by temperature.
4. Its chemical resistance is similar to polytetrafluoroethylene and better than vinylidene fluoride.
Brief introduction of 3. pfa winding pipe
Winding pipe, large diameter winding pipe, double wall winding pipe, hollow winding pipe is a kind of high density polyethylene (HDPE) as raw material, the winding welding forming of a pipe, because of its unique forming process, can produce a diameter of 3 meters of pipe, which is difficult to complete other production processes. High density polyethylene (HDPE) not only ensures the product molding process and product quality due to its excellent fusion welding performance, but also provides a variety of reliable methods for construction connection, such as electric melting welding, heat shrinkage connection, etc. At the same time, this is also an important reason why leakage rarely occurs. It is precisely for this reason that this kind of pipe has unique environmental protection functions that other pipes do not have, this provides a very effective method for the prevention and control of pollution that people are currently concerned about.
The winding pipe is spiral, with good elasticity and stretching force, which can play a good binding role on internal products such as hydraulic hose, wire and cable. At present, the raw materials used in China are polypropylene (PP), polyethylene (PE) or nylon (PA), which make the products have good wear resistance. In addition, winding management also has good high and low temperature resistance, oil resistance, UV resistance, antistatic, impact resistance, tensile resistance and other properties.
4. pfa winding pipe application scenario
With the progress of science and technology, PFA tube products have been widely used and have excellent comprehensive properties. It is composed of polytetrafluoroethylene polymer and its structure is simple. PFA tube is mainly used in machinery, electronics, automotive, aerospace, chemical and other industries. Since PFA tube capillary has a wide range of applications, what products can it produce?
PFA tube products are very wide, the main products are anti-corrosion, sealing, bearings and so on.
Anti-corrosion: PFA tube is a new material in a large number of pores through vertical and horizontal two-way stretching. It will be combined with other fabrics. PFA tube can be made into smoke solid-phase anti-corrosion filter bag or good waterproof and breathable wind and rain heating sports clothes, cold clothes, special protective clothes and light tents, pharmaceutical air compressed air, various solvent sterile filtration and high-purity gas filtration in the electronic industry.
Sealing: winding pipe is mainly used in various engineering machinery and mining hydraulic equipment and wear-resistant requirements of wire and cable protection. Because it can completely cover the protected product, forming an effective wear and anti-ultraviolet protection, it plays a protective role in many rod-shaped objects.
In addition, pfa winding pipes are also widely used in high-pressure epoxy winding pipes, various types of pipes for flue gas desulfurization, fire-fighting pipes, chemical pipes, underground/ground oil storage tanks, wind turbine blades and high-pressure epoxy winding pipe manufacturing equipment.
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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