The production process of PTFE pipe is: PTFE, extrusion aid → mixing → pressing → drying → sintering → cooling → product
The molding process of PTFE pipes includes push method, extrusion method, hydraulic method, welding method, winding method, etc., among which push method is the main method. Generally, a dispersed PTFE resin with a particle size of 500μm and an apparent density of 0.45gml ~0.55gml is used. For small diameter pipes, use resin with relatively large compression, and for large diameter pipes, use resin with relatively small compression. The squeeze aid usually chooses 200 and 260 mineral spirits. The secondary processing of PTFE tubing can produce PTFE heat-shrinkable tubing, PTFE spiral tubing, PTFE hydraulic tubing, etc.
Polytetrafluoroethylene tube is made of polytetrafluoroethylene dispersed resin at room temperature using organic solvent as extrusion aid, and then dried and sintered. According to the pipe diameter, it can be divided into two types: ordinary pipe and micro pipe. The inner diameter of the ordinary tube is 4mm, and the inner diameter of the micro tube is less than or equal to 4mm.
The production process of PTFE pipe is: PTFE, extrusion aid → mixing → pressing → drying → sintering → cooling → product.
Polytetrafluoroethylene pipes have good mechanical strength. The gaskets are flat gaskets, V-shaped gaskets, piston rings, ball valve gaskets, etc., which are made of PTFE rods, tubes, and plates by mechanical turning or cutting, which are corrosion resistant , Resistance and non-conductivity.
1. Teflon pipes generally adopt compression molding method, and plunger extrusion molding can also be used. The resin obtained by the dispersion polymerization method can be formed by paste extrusion and calendering.
2. PTFE has a pH value of 0-14 (except for molten alkali metals and fluorine under high temperature and high pressure), which can have good mechanical strength between 100°C and 100°C.
3. The specific process conditions are that the preforming pressure varies with the shape and size of the product. But it is usually used. Teflon braided packing is 8-34.3MPa, and the resin with filler is 29.4-93MPa. For large wool with a thickness of about 600mm in the pressing direction, there is still a pressure holding time of 20-30min. Note that when the temperature is lower than 185°C. Teflon tubing will become brittle. Pure PTFE gasket is a clean sealing product that will not pollute any substance it comes into contact with and can be widely used in food, medicine and other industries.
Post time: Aug-04-2020