Calcium carbonate and glass fiber filled modified polytetrafluoroethylene material and processing technology thereof

Abstract

The invention discloses a calcium carbonate and glass fiber filled modified polytetrafluoroethylene material and a processing technology thereof, and relates to the technical field of plastic modification. The composite material comprises the following components in parts by weight: 30wt%-40wt% of polytetrafluoroethylene powder, 40wt%-50wt% of glass fibers, 30wt%-50wt% of calcium carbonate powder and 10wt%-20wt% of processing aids, wherein the processing aids comprise a dispersing agent, a lubricating agent and a coupling agent. According to the invention, the design of the high filler is matched with the reasonable processing aid, so that various materials in the polytetrafluoroethylene plate can be uniformly dispersed, and therefore, the manufactured polytetrafluoroethylene plate has relatively small anisotropy, and macroscopically, the polytetrafluoroethylene plate has a relatively small linear expansion coefficient; meanwhile, the mechanical strength performance of the polytetrafluoroethylene plate is greatly improved.

Description

technical field [0001] The invention relates to the technical field of plastic modification, in particular to a modified polytetrafluoroethylene material filled with calcium carbonate and glass fiber and a processing technology thereof. Background technique [0002] PTFE is high temperature resistant (long-term use temperature 200-260 degrees), low temperature resistance (soft at -100 degrees), corrosion resistance (capable of aqua regia and all organic solvents), weather resistance (the best in plastics) aging life), high lubrication (with the smallest friction coefficient among plastics), non-stickiness (with the smallest surface tension among solid materials without sticking to any substance), non-toxic (physiologically inert) and excellent electrical properties, etc. A series of plastics with excellent performance, so it can be an ideal class C insulation material. [0003] Therefore, polytetrafluoroethylene sheets are often used in the market as electrical insulation m...

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Problems solved by technology

[0003] Therefore, polytetrafluoroethylene sheets are often used in the market as electrical insulation materials and linings in contact with corrosive media, supporting sliders, track seals and lubricating materials, and polytetrafluoroethylene sheets are also widely used in chemicals, medicines, dyes, etc. Anti-corrosion lining materials for industrial containers, storage tanks, reaction tower kettles, large pipelines, and anti-sticking materials for machinery, construction, traffic bridge sliders, guide rails, printing and dyeing, light industry, and textile industries, etc., but PTFE has a large Linear expansion coefficient, so it is difficult to use it to make parts with high precision. At the same time, pure PTFE has relatively poor mechanical properties and high cost. Therefore, filled modified PTFE sheets appear on the market. , but its filling amount is mostly between 10% and 30%, and there are few highly filled PTFE sheets. Therefore, a calcium carbonate and glass fiber filled modified PTFE material and its processing technology are proposed. Solve the above technical problems

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