1. PFA end plate

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

What do PFA end plates have to do with fluoroplastic heat exchangers? They are equivalent to the complementary relationship of oil and salt, which play their peak role with each other.

As shown in the figure above, the honeycomb tube sheet is the end plate, and the fluoroplastic heat transfer hose needs to be inserted into the end plate. The end plate is fixed to the tube, so that the end plate has its use value.

It is clear that PFA is of high quality in fluoroplastics, and good horses are equipped with saddles. 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 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.

2, its chemical resistance is similar to polytetrafluoroethylene, better than vinylidene fluoride.

3, its creep resistance and compression strength are better than PTFE, high tensile strength, elongation up to 100-300%. Good dielectric properties, excellent radiation resistance, flame retardant V0 level.

4, non-toxic: with physiological inertia.

Figure 1:PFA end plate Source: Shenzhen Dankai

2. PFA Stick

PFA plastic is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. 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 material has 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, anti-static, corrosion resistance.

The main features of PFA bar:

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

2.2. Almost unlimited chemical resistance, alkali resistance, sulfuric acid resistance, corrosion resistance, aging resistance, and ultraviolet resistance

3. PFA (soluble polytetrafluoroethylene) has excellent heat resistance, cold resistance, chemical stability, mechanical properties, insulation, self-lubrication, folding resistance and cracking resistance.

4. Food grade PFA stick, 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 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.

2, long-term use temperature -196-260 degrees, has excellent chemical resistance, corrosion resistance to all chemicals, the friction coefficient is the lowest in plastics, there are good electrical properties, its electrical insulation is not affected by temperature, known as "plastic king.

3, its chemical resistance is similar to polytetrafluoroethylene, better than vinylidene fluoride.

4, its creep resistance and compression strength are better than PTFE, high tensile strength, elongation up to 100-300%. Good dielectric properties, excellent radiation resistance. Flame retardant up to V0 level.

5, suitable for the production of corrosion-resistant parts, wear parts, seals, insulation parts and medical equipment parts.

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

PFA is used for various anti-corrosion, sealing, wear-reducing, insulating parts, anti-sticking, light-transmitting parts, capacitor insulation and corrosion-resistant water pump pump head, valves, accessories, seals, high temperature resistance seals, corrosion-resistant parts are suitable for making corrosion-resistant parts, wear-reducing parts, seals, insulation parts and medical equipment parts, etc.

Figure 2:PFA Bar Source: Shenzhen Dankai

3. PFA board

The PFA sheet has a melting point of about 580F and a density of 2.13-2.16g/cc (grams per 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 forms of PFA are used in the form of granular products for molding and extrusion, powder products for rotational molding and coating, and semi-finished products include films, plates, rods and pipes. The use of PFA is similar to FEP.

PFA plate forming performance:

1, crystalline material, moisture absorption is small. Can be processed into products using the usual thermoplastic processing methods

2, poor fluidity, easy to decompose, decomposition of corrosive gas. 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 resistance of the gating system to the material flow should be small.

3. Translucent pellets, injection molding, extrusion molding. The molding temperature is 350-400 degrees, and more than 475 degrees is easy to cause discoloration or bubbles. And note that demoulding will be more difficult.

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

Figure 3:PFA Board Source: Shenzhen Dankai

PFA plastic is suitable for the production of corrosion-resistant parts, wear-reducing parts, seals, insulation and medical equipment parts, high-temperature wire, 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 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.