Preparation methods for special fluorine-containing dispersion resin mixture and microporous film thereof

Abstract

The invention discloses a preparation method for a special fluorine-containing dispersion resin mixture. The method comprises the following steps: blending a tetrafluoroethene homopolymer dispersion emulsion with a fluorine-containing hot-meltable processing dispersion emulsion according to a dry weight ratio of 19: 1 to 3: 7; then diluting an obtained blend with deionized water into a blended emulsion with solid content of 10 to 20%; and successively carrying out demulsification through high-speed stirring, coagulation and drying so as to obtain the special fluorine-containing dispersion resin mixture. The mixture is blended with lubricating oil so as to prepare a fluorine-containing microporous film. The fluorine-containing microporous film has high content of nanometer silk fiber and high physical and mechanical strength; when the microporous film is applied in the industries of filtration and clothes and compounded with a fabric, an obtained composite fabric has high water-pressure resistance, moisture permeability and air permeability and excellent tensile strength and can better realize market acceptance.

Description

technical field

[0001] The invention relates to a fluorine-containing resin, in particular to a preparation method of a special fluorine-containing dispersed resin mixture and a microporous film thereof. Background technique

[0002] Fluorine-containing resins, especially copolymer resins containing tetrafluoroethylene, have excellent physical and mechanical properties and chemical stability, and are widely used in various fields such as chemical materials, mechanical electronics, aerospace military industry, new materials and new energy. The polytetrafluoroethylene dispersed resin is extruded and deoiled by paste extrusion, and then stretched in one or two directions to obtain a microporous and breathable polytetrafluoroethylene microporous material. Due to its special properties, the material Become a high-end application of fluorine-containing functional materials, such as environmental protection filter materials, clothing fabrics, artificial organ materials, electronic ...