Polytetrafluoroethylene fiber with antistatic function of and preparation method thereof

Abstract

The invention discloses a modified polytetrafluoroethylene fiber and a preparation method thereof, in particular to a polytetrafluoroethylene fiber with an antistatic function and a preparation method thereof. The fiber comprises the following components by weight percent: 98.5-99.5% of polytetrafluoroethylene and 0.5-1.5% of nano carbon fiber powder. The preparation method of the fiber comprises the following steps of preparation, blending, oil addition, compaction, extruding, rolling, sintering, drafting, splitting, carding, winding, curling, sizing and chopping so as to obtain a chopped fiber. The invention has the beneficial effects that as long as the polytetrafluoroethylene fiber with an antistatic function contacts with an escaping approach, the charge generated by the fiber can be released in time, thereby enabling the fiber to have no static electricity charges or reduce the static electricity charge quantity. In the preparation method in the invention, because the nano carbon fiber is added, the mesh interspace among the polytetrafluoroethylene molecules is filled, the fiber strength is improved, and the physics plastic deformation property of the polytetrafluoroethylene is effectively improved, thereby enabling the fiber to have creep resistance. The finished product obtained by the method is the fiber with the functions of anti-static electricity, creep resistance and high strength; and the self-deashing capability of the polytetrafluoroethylene is improved by adding the nano carbon fiber powder in the method.

Description

technical field [0001] The invention relates to a modified polytetrafluoroethylene fiber and a manufacturing method thereof, in particular to a polytetrafluoroethylene antistatic functional fiber and a manufacturing method thereof. Background technique [0002] Polytetrafluoroethylene (PTFE) chopped fiber material has been widely used in the manufacture of needle felt as a filter material in recent years. Because this kind of fiber has high temperature resistance, corrosion resistance (drug resistance), oxidation resistance and good non-adhesion performance, the filter material made of it has wide adaptability to working conditions, excellent performance and long service life, so it has broad application fields. market expectation. However, since PTFE is a polymer material with high dielectric coefficient and specific resistivity, the fiber material is non-conductive (insulating). Therefore, during the carding process, the charge generated by the friction between the fiber...

AI Technical Summary

Problems solved by technology

However, these technical means may lead to low carding efficiency, and problems such as improper spraying of antistatic agents, excessive moisture to fibers, fiber adhesion, and generation of hair particles.

In particular, special equipment is generally modified equipment, and the carding efficiency is low, which cannot be compared with new high-efficiency carding equipment.

Therefore, the electrostatic characteristics of PTFE fiber materials have restricted the application and promotion of the material itself to a certain extent, and filter material companies often give up the selection of PTFE fiber materials due to the difficulty in carding.