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How high is the temperature of the PTFE heat shrinkable tube

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How high is the temperature of the PTFE heat shrinkable tube

  • Categories:Industry news
  • Author:PFA tube lady
  • Origin:PFA tube lady
  • Time of issue:2006-10-21 10:03
  • Views:

How high is the temperature of the PTFE heat shrinkable tube

  • Categories:Industry news
  • Author:PFA tube lady
  • Origin:PFA tube lady
  • Time of issue:2006-10-21 10:03
  • Views:

  Normal operating temperature of Teflon heat shrinkable tube: -65℃~260℃. There is no problem when Teflon works normally for two hours at a high temperature of 300 degrees. Teflon heat-shrinkable tubing is also known as Teflon heat-shrinkable tubing.

  The Teflon heat-shrinkable tube is made of high-quality Teflon [PTFE polytetrafluoroethylene] by extruding and sintering:

  Teflon heat-shrinkable tubing not only has the advantages of common heat-shrinkable tubing, but also has the excellent characteristics of fluoropolymer.

  Teflon heat shrinkable tubing is made of polytetrafluoroethylene, which is the best among fluoropolymers.

  The advantages of Teflon heat shrinkable tubing are: high temperature resistance, chemical corrosion resistance, not easy to be broken, low moisture absorption, and rapid and complete shrinkage at high temperatures.

  PTFE heat-shrinkable tubing has excellent electrical insulation, high flame retardancy and self-lubricating properties, resistance to ultra-high temperature and chemical reagents, and resistance to almost all oils and chemicals. PTFE heat-shrinkable tubing is widely used in automotive, military, aerospace, electronic and chemical industries.

  

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Figure 1: PTFE heat shrinkable tube source: Shenzhen Dankai

  2. Teflon tube for transformer

  Teflon tube product features

  1. High chemical stability: can withstand all strong acids, including aqua regia, hydrofluoric acid, concentrated hydrochloric acid, nitric acid, fuming sulfuric acid, organic acids, etc., strong alkalis, strong oxidants, reducing agents and various organic solvents . It is very suitable for feeding high-purity chemicals.

  2. Low coefficient of friction: The coefficient of friction is generally only 0.04, which is a very excellent self-lubricating material, and the coefficient of friction does not change with changes in temperature. 3

  3. Excellent anti-sticking property, and the inner wall of the tube is not easy to adhere to colloids and chemicals.

  4. Excellent aging resistance, can be used outdoors for a long time.

  5. Excellent electrical insulation performance: PTFE is a highly non-polar material with good dielectric properties, great resistance, and a dielectric constant of about 2.0, which is the smallest among all electrical insulation materials.

  6. Part of the tube has high transparency, and the internal fluid condition can be easily observed.

  The transformer bushing is the main insulation device outside the transformer box. The lead wires of the transformer windings must pass through the insulating bushing to insulate between the lead wires and between the lead wires and the transformer shell, and at the same time play the role of fixing the lead wires.

  Due to the different voltage levels, insulating bushings include pure porcelain bushings, oil-filled bushings and capacitor bushings. Pure porcelain bushings are mostly used in transformers of 10kV and below. It is to wear a conductive copper rod in the porcelain bushing, and the porcelain bushing is air-insulated; oil-filled bushings are mostly used in 35kV transformers, which are filled with oil in the porcelain bushing. , Wear a conductive copper rod in the porcelain bushing, and the copper rod is covered with insulating paper; the capacitive bushing is used on high-voltage transformers above 100kV. It consists of a main insulating capacitor core, outer insulating upper and lower porcelain parts, connecting sleeves, and oil pillows. , Spring assembly, base, equalizing ball, measuring terminal, terminal block, rubber gasket, insulating oil, etc.

  With the development of my country's power industry, power supply has increased year by year, and power transformers have gradually developed in the direction of high voltage and large capacity. At the same time, due to the improvement of manufacturing technology, the insulation distance of each part of the transformer product is gradually reduced. In this way, the capacitor bushing as a matching product of the transformer has stricter requirements on its appearance and size.

  

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Picture 2: Teflon tube source: Shenzhen Dankai

  At present, many transformer bushings use Teflon tube, because Teflon has excellent performance, meets the insulation conditions required by transformers, and is resistant to high temperature, corrosion, acid and alkali, and friction.

  Three, white Teflon board manufacturers

  Polytetrafluoroethylene board (also called tetrafluoroethylene board, Teflon board, Teflon board) is divided into two types: molding and turning. Made by cooling. The PTFE turning board is made of PTFE resin by pressing, sintering and peeling. Its products are widely used and have extremely superior comprehensive performance: high and low temperature resistance (-192℃-260℃), corrosion resistance (strong acid, strong alkali, aqua regia, etc.), weather resistance, high insulation, high lubrication, non-sticking, Non-toxic and other excellent characteristics.

  Polytetrafluoroethylene board (also called tetrafluoroethylene board, Teflon board, Teflon board) is divided into two types: molding and turning. Made by cooling. Polytetrafluoroethylene has excellent comprehensive properties: high and low temperature resistance (-192℃-260℃), corrosion resistance (strong acid, strong alkali, aqua regia, etc.), weather resistance, high insulation, high lubrication, no adhesion, no Poisonous and other excellent characteristics. Polytetrafluoroethylene (English abbreviation Teflon or [PTFE,F4]), known as "Plastic King", Chinese trade names "Teflon", "Teflon" (teflon), "Teflon" , "Teflon", "Teflon" and so on.

  It is a polymer compound formed by polymerization of tetrafluoroethylene. Its structural formula is -[-CF2-CF2-]n-, which has excellent chemical stability and corrosion resistance (polytetrafluoroethylene referred to as PTFE or F4 , Is one of the most corrosion-resistant materials in the world today. "Plastic King" is the common name of polytetrafluoroethylene. It is a kind of plastic with the best corrosion resistance. Polytetrafluoroethylene itself is not toxic to humans, but in production One of the raw materials used in the process, perfluorooctanoate (PFOA), is thought to be carcinogenic.

  The temperature is -20~250℃ (-4~+482°F), allowing rapid cooling and heating, or alternate operation of cooling and heating.

  Pressure -0.1~6.4Mpa (Full vacuum to 64kgf/cm2) (Full vacuum to 64kgf/cm2)

  Its emergence has solved many problems in my country's chemical, petroleum, pharmaceutical and other fields. Polytetrafluoroethylene seals, gaskets, gaskets. Polytetrafluoroethylene seals and gaskets are made of suspension polymerized polytetrafluoroethylene resin molding. Compared with other plastics, PTFE has the characteristics of chemical resistance, and it has been widely used as a sealing material and filling material.

  Shenzhen DanKai Technology Co., Ltd. (ShenZhen DanKai Technology Co.,ltd.), whose predecessor is Dongguan Dandi Insulation Material Co., Ltd. Fluoroplastic Material Factory, established in 1998, specializes in FEP, PFA, PTFE and other fluoroplastic pipes R&D, production and sales of rod, sheet and film products and other insulating materials. The company has a senior R&D team with international standards and a production line of fluorine plastic products imported from abroad. Some fluoroplastic products have passed ISO9001, SGS, FDA certification, and have been fully affirmed by domestic and foreign cooperative customers such as Huawei, Foxconn, Midea, ZTE, Intel, and AirTAC. The main products of the company are: ①Tubes: Ptfe tube, Fep tube, Pfa tube, Pvdf tube; ②Heat shrinkable tube: Ptfe heat shrinkable tube, Fep heat shrinkable tube, Pfa heat shrinkable tube, Pvdf heat shrinkable tube; ③Plate rod Membrane: Ptfe board and rod film, Fep board and rod film, Pfa board and rod film, Pvdf board and rod film; ④Insulation materials: silica gel, PE, PVC, UPE, etc.; ⑤Special category: PFA imported connector, spiral tube, spring tube , Rotary cut tube, welding rod, tee, straight-through, gasket, joint, taper rod, flared tube, sealing tube, braided tube, bellows, etc. At the same time, fluorine plastic products of various specifications can be customized and processed according to customer requirements.

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