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Hot key words: Polyperfluoroethylene propylene(FEP/F46)     PTFE/PTFE/Teflon series     Soluble polytetrafluoroethylene(PFA)  

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PFA end plate

  • Categories:Industry news
  • Author:Miss Teflon tube
  • Origin:Miss Teflon tube
  • Time of issue:2004-01-09 10:03
  • Views:

PFA end plate

  • Categories:Industry news
  • Author:Miss Teflon tube
  • Origin:Miss Teflon tube
  • Time of issue:2004-01-09 10:03
  • Views:

  One, PFA end plate

  The fluoroplastic heat exchanger (pictured below) is a heat exchanger with a small diameter fluoroplastic hose as the heat transfer component, also known as a flexible tube heat exchanger. Commonly used fluoroplastics are polytetrafluoroethylene (F4), polyperfluoroethylene propylene (F46) and fusible polytetrafluoroethylene (PFA). Fluoroplastic heat exchangers are mainly used for heat exchange of various highly corrosive media with a working pressure of 0.2~0.4MPa and a working temperature below 200℃, such as sulfuric acid, highly corrosive chloride solutions, acetic acid and caustic media. Cool or heat.

  

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  What is the relationship between PFA end plates and fluoroplastic heat exchangers? They are equivalent to the complementary relationship of oil and salt, and the two work together to play their peak role.

  As shown in the figure above, the honeycomb tube plate is the end plate, and the fluoroplastic heat transfer hose needs to be inserted into the end plate. The end plate fixes the tube, and the tube makes the end plate useful.

  Know the industry clearly, PFA material is of high quality among fluoroplastics, and a good horse is equipped with a good saddle. At present, the biggest use of PFA end plates is the fixing of heat exchangers.

  PFA board material performance:

  1. It is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. The melt adhesion is enhanced, the melt viscosity is reduced, and the performance is unchanged compared with polytetrafluoroethylene. This kind of resin can be directly processed into products by ordinary thermoplastic molding methods.

  2. Its chemical resistance is similar to polytetrafluoroethylene and better than vinylidene fluoride.

  3. Its creep resistance and compressive strength are better than those of polytetrafluoroethylene, and its tensile strength is higher, and its elongation rate can reach 100-300%. Good dielectric properties, excellent radiation resistance, and flame retardancy up to V0 level.

  4. Non-toxic: with physiological inertness.

  

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Figure 1: PFA end plate source: Shenzhen Dankai

  Two, PFA rod

  PFA plastic is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. The melt adhesion is enhanced, the melt viscosity is reduced, and the performance is unchanged compared with polytetrafluoroethylene. This kind of resin can be directly processed into products by ordinary thermoplastic molding methods. Suitable for making corrosion-resistant parts, wear-reducing and wear-resistant parts, seals, insulating parts and medical equipment parts, high-temperature wires, cable insulation, anti-corrosion equipment, sealing materials, pump valve bushings, and chemical containers.

  PFA materials include tubes, rods, membranes, end plates, etc. The main functions of PFA rods: hydrolysis resistance, acid and alkali resistance, impact resistance, chemical resistance, wear resistance, high temperature resistance, insulation, antistatic, and corrosion resistance.

  The main features of PFA bars:

  1. The working temperature of PFA bars-200 to 260 degrees

  2. 2. Almost unlimited chemical resistance, alkali resistance, sulfuric acid resistance, corrosion resistance, aging resistance, UV resistance

  3. PFA (Soluble Polytetrafluoroethylene) has excellent heat resistance, cold resistance, chemical stability, mechanical properties, insulation properties, self-lubricating properties, folding resistance and crack resistance.

  4. Food grade PFA rod, non-toxic, special for medical machinery, special for food machinery

  PFA material performance

  1. It is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. The melt adhesion is enhanced, the melt viscosity is reduced, and the performance is unchanged compared with polytetrafluoroethylene. This kind of resin can be directly processed into products by ordinary thermoplastic molding methods.

  2. The long-term use temperature is -196-260 degrees, it has excellent chemical resistance, corrosion resistance to all chemicals, the lowest friction coefficient among plastics, and good electrical properties. Its electrical insulation is not affected by temperature. Influence, known as the "Plastic King".

  3. Its chemical resistance is similar to polytetrafluoroethylene and better than vinylidene fluoride.

  4. 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. Flame retardancy reaches V0 level.

  5. Suitable for making corrosion-resistant parts, wear-reducing and wear-resistant parts, sealing parts, insulating parts and medical equipment parts.

  6. High-temperature wire and cable insulation, anti-corrosion equipment, sealing materials, pump valve bushings, and chemical containers.

  PFA use, used for various anti-corrosion, sealing, anti-wear, insulating parts, anti-sticking, light-transmitting parts, capacitor insulation, corrosion-resistant water pump pump heads, valves, accessories, seals, high-temperature-resistant seals, and corrosion-resistant parts. Production of corrosion-resistant parts, wear-reducing and wear-resistant parts, seals, insulating parts and medical equipment parts, etc.

  

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Picture 2: PFA bar source: Shenzhen Dankai

  Three, PFA board

  The melting point of the PFA board is about 580F, and the density is 2.13-2.16g/cc (grams/cubic centimeter). PFA is similar to PTFE and FEP, but above 302T, the mechanical properties are slightly better than FEP, and can be used at temperatures up to 500F, and its chemical resistance is equivalent to PTFE.

  The product form of PFA is useful for molding and extruding granular products, and powder products for rotational molding and coating. Its semi-finished products include films, plates, rods and pipes. The use of PFA is similar to FEP.

  PFA board forming performance:

  1. Crystal material, low moisture absorption. Can be processed into products by usual thermoplastic processing methods

  2. Poor fluidity, easy to decompose, and produce corrosive gas during decomposition. It is advisable to strictly control the molding temperature not to exceed 475 degrees, the mold should be heated to 150-200 degrees, and the pouring system should have low resistance to material flow.

  3. Translucent pellets, injection molding and extrusion molding. The molding temperature is 350-400 degrees, and the temperature above 475 degrees is likely to cause discoloration or air bubbles. And note that demolding will be more difficult.

  4. Because the molten material has a corrosive effect on the metal, the mold needs to be electroplated with chromium for long-term production. The chemical properties of PFA FEP PTFE are similar, but FEP can only be used below 200 degrees, and PTFE cannot be injection molded.

  

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Figure 3: PFA board source: Shenzhen Dankai

  PFA plastics are suitable for making corrosion-resistant parts, wear-reducing and wear-resistant parts, seals, insulating parts and medical equipment parts, high-temperature wires, cable insulation, anti-corrosion equipment, sealing materials, pump valve bushings, and chemical containers.

  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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