Preparation method of high-filler-filling-amount polytetrafluoroethylene composite film material

Abstract

The invention provides a preparation method of a high-filler-filling-amount polytetrafluoroethylene composite film material. According to the main content of the preparation method, by means of high-speed mixing, cold pressing blank formation, sintering formation, turning film formation and calendaring aftertreatment, the polytetrafluoroethylene composite film material with the filling amount of inorganic filler as high as 20wt% or over is prepared; and besides, through design of the dispersion states of multiple kinds of inorganic filler with different functions and adjustment of the preparation technology, the inorganic filler / polytetrafluoroethylene composite film material which is controllable in film structure and excellent in mechanical performance, electrical conductivity, heat conductivity and wear resistance can be prepared. The high-filler-filling-amount polytetrafluoroethylene composite film material has the advantages of being controllable in film structure, excellent in mechanical performance, flexible and adjustable in functionality, simple in preparation technology and equipment and suitable for industrialization. The high-filler-filling-amount polytetrafluoroethylene composite film material has remarkable research value and application prospect in the field of high-performance high-functionality PTFE composite film materials.

Description

technical field

[0001] The invention relates to a method for preparing a polytetrafluoroethylene composite membrane material with a high filling content of fillers, and more specifically relates to a polytetrafluoroethylene composite membrane material with a filling content of inorganic fillers up to 20wt%, controllable dispersion form of inorganic fillers, controllable composite membrane structure, and controllable functions. The invention relates to a preparation method of a polytetrafluoroethylene composite membrane material with high filler filling capacity, simple adjustment and equipment process, excellent mechanical properties, and industrialization, and belongs to the technical field of high-performance polytetrafluoroethylene composite membrane materials. Background technique

[0002] Polytetrafluoroethylene (PTFE), as a special engineering plastic, has been known as the "King of Plastics" since the American scientist R.S.Plunkett discovered PTFE in the process of st...