1. can't FEP hot melt bond?

FEP chemical English name: Tetrafluoroethylene-hexafluoropropylene copolymer or Fluororesin-46, abbreviation: FEP or F46. Perfluoroethylene propylene resin F46(FEP) is a copolymer of tetrafluoroethylene and hexafluoropropylene. It has good thermal stability, outstanding chemical inertness, excellent electrical insulation and low friction coefficient, and can be processed by thermoplastic processing methods. F46 resin not only has the characteristics similar to polytetrafluoroethylene, but also has the good processing properties of thermoplastics.

The molecular structure of FEP is the same as that of polytetrafluoroethylene, which is also completely fluorinated, except that part of the fluorine atoms in the F46 main chain are replaced by trifluoromethyl (-CF3).

Chemically: almost all chemicals and solvents are stable

Thermanology: PTFE,PFA continuous use temperature is 260 degrees, FEP continuous use temperature is 200 degrees

Mechanical: minimum coefficient of friction and tightness

Electrically: in insulators, with smaller dielectric constants, dielectric loss factors.

Other: non-adhesive, weather resistance, flame retardant, low temperature resistance

Invention time course: PTFE -> FEP -> PFA

Hot melt is generally used as hot melt connection. The principle of hot melt connection is to tightly press the mating surfaces of two FEP pipes on a heating tool to heat their flat end surfaces until they are melted. After removing the heating tool, the two melted end surfaces are tightly pressed together and kept under the action of pressure until the joint is cooled, thus connecting the two pipes into an integral operation.

Note: FEP is hot-melted. Only FEP materials can be hot-melted with FEP. Homosexual phase melts and heterosexual phase repulsion.

FEP physical performance table:

FEP has both similar characteristics to polytetrafluoroethylene and good processability of thermoplastics. Therefore, it makes up for the difficulty of processing polytetrafluoroethylene and makes it a material to replace polytetrafluoroethylene. It is widely used in the production of wires and cables for electronic equipment transmission wires used at high temperature and high frequency, connecting wires inside electronic computers, aerospace wires and special purpose installation wires, oil pump cables and insulating layers of submersible motor winding wires.

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. Mainly used in communication cables, wires, semiconductors, chemical anti-corrosion, medical materials, automobiles, industrial coatings and other fields.

In addition, it can be used as a conveying pipe for corrosive liquid and gas, lining pipe, heat exchanger pipe and liquid level meter. At the same time, it can be used as wires, cables and electrical components used at various frequencies.

Figure 1:FEP Tube Source: Shenzhen Dankai

2. teflon tube corrosion?

Fluoroplastics were founded in 1934, Schloffer,Scherer the discovery of polychlorotrifluoroethylene (PCTFE). Polytetrafluoroethylene (PTFE) was discovered by DuPont in 1938 and industrialized in 1949. Then Britain's ICI, Germany's Hoechst, Japan's Daikin industry, Italy's Montefluos, etc. have been put into production. China's fluorine plastics in 1958 successfully developed, first in Shanghai to implement industrialization.

Teflon is commonly known as polytetrafluoroethylene (abbreviated as Teflon or [PTFE,F4]). Polytetrafluoroethylene is a resin with various excellent properties and high performance.

Chemically: almost all chemicals and solvents are stable

Thermanology: PTFE,PFA continuous use temperature is 260 degrees, FEP continuous use temperature is 200 degrees

Mechanically: smaller friction coefficient and tightness

Electrically: in insulators, with smaller dielectric constants, dielectric loss factors.

Other: non-adhesive, weather resistance, flame retardant, low temperature resistance

Invention time course: PTFE -> FEP -> PFA

Polytetrafluoroethylene is a polymer compound formed by the polymerization of tetrafluoroethylene. Because it is a high molecular polymer, it is non-toxic. Teflon has excellent chemical stability and corrosion resistance (it is one of the best corrosion resistance materials in the world today.

Polytetrafluoroethylene in addition to molten alkali metal, chlorine trifluoride, chlorine pentafluoride and liquid fluorine, can withstand all other chemicals. Boiling in aqua regia does not change, and is widely used in various applications that require anti-acid and alkali and organic solvents.

Teflon tube has sealing, high lubrication non-stick, electrical insulation and good anti-aging endurance, excellent temperature resistance (can work at a temperature of 260 ℃ to -180 ℃ for a long time).

3. teflon hardness?

Recently, many customers asked me, how about the hardness of Teflon tube? Is Teflon a hard tube or a hose? Here I want to give you a professional explanation.

First of all, you need to know what a Teflon tube is. The tube basically has an intuitive image. What about Teflon?

Figure 2: Teflon tube Source: Shenzhen Dankai

Teflon is commonly known as Teflon (abbreviated as Teflon or [PTFE,F4]), known as/commonly known as "plastic king", also known as "Teflon", "Teflon" (teflon), "Teflon", "Teflon", "Teflon", "Teflon" and so on. It is a polymer compound made by the polymerization of tetrafluoroethylene.

The color of PTFE is Milky White, which can produce color, but the defect is that it cannot be transparent. Alternative transparencies are polyvinylidene fluoride ethylene propylene (ptfe) and fep (soluble polyvinylidene fluoride ethylene propylene). Teflon is a hose with a Shore hardness of D55.

PTFE pipe is the use of high-quality plunger extrusion pipe, the use of special processing technology, so that the steel pipe and plastic pipe closely combined, can withstand positive pressure 1.6Mpa, negative pressure: 77Kpa; can be in -60 ℃ ~ 260 ℃ normal use, with reliable and excellent corrosion resistance, conveying high temperature corrosive gas, liquid.

Polytetrafluoroethylene (PTFE) has excellent chemical stability, can withstand all strong acids, strong bases, strong oxidants, and does not work with various organic solvents. PTFE has a wide range of temperature, and can be applied to -180 ℃ ~ 250 ℃ for a long time under normal pressure. After being treated at 250 ℃ for 1000h, its mechanical properties change very little. PTFE has a very low friction coefficient, is a good antifriction, self-lubricating material, its static friction coefficient is less than the dynamic friction coefficient, so used to make the bearing has the advantages of small starting resistance, smooth operation. PTFE is an excellent electrical insulation material due to its non-polar, heat-resistant and non-absorbent properties. Also has excellent aging resistance, non-sticky and non-flammable.

PTFE made of bars, pipes, films, bearings, gaskets, valves and other profiles and parts, widely used in machinery, chemical, aviation, electrical and electronics, national defense industry, cutting-edge technology, medical and health and electrical insulation and other fields.

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.