FEP tubing and ptfe liner comparison of regarding adhesion
A, fep heat shrink tube hot melt bonding can not?FEP chemicals: Tetrafluoroethylene-hexafluoropropylene copolymer or Fluororesin-46, abbreviation: FEP or F46 . F46 (FEP) is a copolymer of tetrafluoroethylene and hexafluoropropylene, which has good thermal stability, outstanding chemical inertness, excellent electrical insulation and low coefficient of friction, and can be processed by thermoplastic processing methods.F46 resin has similar properties to polytetrafluoroethylene, but also has good processing properties of thermoplastics.
The molecular structure of FEP, like PTFE, is also a fully fluorinated structure, the difference being that part of the fluorine atom of the F46 main chain is replaced by trifluoromethyl (-CF3).
Chemically: It is stable to almost all chemicals and solvents.
Thermally: PTFE, PFA continuous use temperature is 260 degrees, fep shrink sleeve continuous use temperature is 200 degrees
Mechanically: Minimal coefficient of friction and sealability
Electrical: Insulator with small dielectric constant and dielectric loss factor
Others: non-adhesive, weathering, flame-retardant, low temperature resistance
Invention process: PTFE -> FEP -> PFA
Hot fusion is generally used as a hot melt connection. The principle of hot fusion connection is to heat the flat end surfaces of twofep heat shrink tube by pressing the mating surfaces against a heating tool until they are molten, and after removing the heating tool, the two molten end surfaces are pressed together and held under pressure until the joint cools, making the two sections of tubing connected into a single operation.
Note: FEP can only be made of FEP material and FEP hot fusion, same sex fusion, opposite sex repulsion .
FEP has similar characteristics to PTFE, but also has the good processing performance of thermoplastic. Thus, it makes up for the processing difficulties of PTFE, making it a material that replaces PTFE. It is widely used in wire and cable production for transmission wires of electronic equipment used at high temperatures and high frequencies, connection wires inside electronic computers, wires for the aviation universe and its special purpose installation wires, oil pump cables and insulation layers for winding wires of submerged oil motors.
Its main applications are for making inner villages of tubes and chemical equipment, the surface layer of drums and various wires and cables, such as aircraft hook-up lines, booster cables, alarm cables, flat cables and oil well logging cables. fep film has been seen used as a thin coating for solar collectors. It is mainly used in communication cables, electric wires, semiconductors, chemical anti-corrosion, medical materials, automobiles, industrial coatings and other fields.
Also can be used as corrosive liquid and gas transport tube, lining tube, tube for heat exchanger and liquid level meter. Also can be used as wire, cable and electrical components used in various frequencies
Teflon is commonly known as polytetrafluoroethylene (abbreviated as Teflon or [PTFE, F4]), which is also known as “Teflon”, , “Teflon”, “Teflon” and “Teflon”, “Teflon” and so on. It is a polymer compound made of tetrafluoroethylene by polymerization.
The color of polytetrafluoroethylene is milky white, and it can be produced in color, but the defect is that it cannot be made transparent. The alternatives to transparent are polyvinylidene fluoride (ptfe) and fep (soluble polyvinylidene fluoride). Teflon is a hose with a Shore hardness of D55.
Polytetrafluoroethylene tube is the use of high-quality plunger worker extrusion tube, using a special processing technology, so that the steel and plastic tube closely combined, can withstand positive pressure 1.6Mpa, negative pressure: 77Kpa; can be used normally within -60 ℃ ~ +260 ℃, with reliable and excellent corrosion resistance, conveying strong corrosive gas and liquid at high temperatures.
Polytetrafluoroethylene (PTFE) has excellent chemical stability, can resist all strong acids, strong alkalis, strong oxidants, and a variety of organic solvents do not occur. PTFE use a wide range of temperature, atmospheric pressure can be used for a long time -180 ℃ ~ 250 ℃, after processing at 250 ℃ high temperature 1000h, its mechanical properties change very little. PTFE has a very low friction factor, is a Its static friction coefficient is smaller than the dynamic friction coefficient, so it is used to make bearings with the advantages of low starting resistance and smooth running. Because PTFE is non-polar, heat-resistant and non-absorbent, it is an excellent electrical insulation material. It also has excellent aging resistance, non-stick and non-combustibility.
PTFE rods, tubes, films, bearings, gaskets, valves and other profiles and parts are widely used in machinery, chemicals, aviation, electrical and electronic, national defense industry, cutting-edge science and technology, medical and health care and electrical insulation and other fields.