Wet mixing is generally used

In order to ensure the uniformity of products, wet mixing is generally used. The process is to mix PTFE resin and pigment with solvent \u0026rarr; mix \u0026rarr; dry \u0026rarr; remove solvent \u0026rarr; color material. At present, PTFE membrane products include porous membrane, microfiltration membrane, and color membrane. PTFE coated fiberglass fabric Molded pre-forming: Reasonable selection of pre-forming unit pressure is an important process condition for producing PTFE colored film. Its production process: PTFE resin, pigment \u0026rarr;mixing\u0026rarr; compression molding\u0026rarr; sintering\u0026rarr; cooling\u0026rarr; turning non-directional film\u0026rarr; calendering semi-directional film Main process parameters: Mixing: At present, there are two main mixing methods for producing colored PTFE films; dry mixing and wet mixing. PTFE film generally adopts suspension polymerized PTFE resin, and the particle diameter is required to be below 150 m.

Sintering cooling: Because the color film contains pigments, the thermal conductivity and thermal expansion coefficient are inconsistent with PTFE. Studies have shown that wet mixing is more uniform than dry mixing, but there are more processes, high costs, and solvents are needed. Pigments must have good heat resistance (>400℃), fine particles, strong coloring power, and stability of chemical reagents.The PTFE film is formed by pressing and sintering a cylindrical blank, which is cut into a film by a machine tool and then rolled. Therefore, the rising and falling temperature during the sintering process is slower than that of ordinary PTFE film, and the sintering temperature is lower than that of ordinary film. It is mainly selected according to the resin fineness, compression ratio, pigment type fineness and other conditions, generally 20-40MPa.

The rising and falling temperature is 20-30℃/h, and the sintering temperature is 375 ℃. Polytetrafluoroethylene color film PTFE color film is suitable for the insulation of electrical instruments or wires marked by color. It is one of the indispensable and important materials in the radio industry, aviation industry and cutting-edge science and technology. 1.. According to the different treatment methods, it can be divided into three types: oriented membrane, semi-oriented membrane and non-oriented membrane. It is a new type of C-class insulating material with excellent comprehensive performance. The general film heating rate is 50-60°C/h before 327°C, 30-40°C/h after 327°C, sintering temperature is 380°C, and temperature drop rate is 20-50°C/h

Wet mixing is generally used

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