The main technical indicators are shown in the table. The principle is that PTFE produces forced high elastic deformation after being stressed during processing. Blowing: at about 310℃, filled with compressed gas below 0.
Production process parameters: The front part is the same as ordinary PTFE tube. Heat treatment: the process of further sintering the dried and sintered tube at high temperature and then quenching it, the temperature is 390℃ plusmn;2℃, and the cooling liquid is -5℃. This deformation is reversible and freezes at low temperature. It is reported that the maximum shrinkage rate of PTFE heat shrinkable tube is greater than 75%.
It is widely used in electrical, chemical, machinery, printing and other industries.PTFE heat shrinkable tube has the characteristics of heat shrinkage, so it can be tightly wrapped on the surface of other workpieces, so that the workpiece has corrosion resistance, electrical insulation and anti-sticking properties. Return to the original state. It is made of dispersed PTFE resin. Typical formula for producing PTFE heat shrinkable tube: PTFE fiberglass adhesive tape Disperse PTFE resin 100 (parts by weight) Extrusion aid 20-22
Production process: PTFE resin, extrusion aid ; mixing rarr; storage rarr; preforming rarr; pushing rarr; drying rarr; sintering rarr; cooling rarr; heat treatment rarr; inflation rarr; cooling rarr; products. If it is reheated and frozen, the forced high elastic deformation will gradually disappear. Main equipment: inflator, the others are the same as ordinary PTFE tube.
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