Detailed introduction of PTFE tape

Today, with the rapid development of modern high-tech, especially the development of aviation, aerospace and marine development, the use environment of materials is more vicious. and corrosion resistance and other characteristics have increasingly put forward more stringent requirements, especially advanced high-performance composite materials are to meet the needs of the above-mentioned high-tech development.

Polytetrafluoroethylene tape is commonly known as "plastic king". Among various plastics, polytetrafluoroethylene has particularly superior characteristics, in addition to heat resistance, low temperature resistance, chemical resistance, electrical insulation and high frequency characteristics In addition to its special advantages, it also has unique non-adhesion, sealing, low friction and good aging resistance, and can be used for a long time at -196°C-260°C. Due to these excellent properties, PTFE products are not only used in the chemical industry, electrical, electronic and mechanical industries, but are also widely used in various fields from aviation, aerospace, military industry to medicine, medical care, and daily necessities.

Glass fiber is an inorganic non-metallic material with excellent performance. Its advantages are good insulation, strong heat resistance, good corrosion resistance and high mechanical strength, but its disadvantages are brittleness and poor wear resistance. Glass fibers are usually used as reinforcing materials in composite materials, electrical insulating materials and thermal insulation materials, circuit substrates and other fields of the national economy.

The base cloth of PTFE varnished microporous tape is made of high-strength alkali-free glass fiber cloth, which is repeatedly and fully impregnated and coated with PTFE dispersion emulsion, and is made by drying, baking, sintering, glazing and other processes. It not only has the properties of high temperature resistance and high strength of glass fiber fabric, but also has a series of excellent properties such as excellent temperature resistance, insulation, corrosion resistance, anti-sticking and smoothness of PTFE.

Due to its very good chemical stability (it has no chemical reaction with strong acids, strong bases, strong oxidants and most organic solvents at high temperatures), especially its smooth surface, almost all adhesives cannot. Effectively acts on its smooth surface, so it generally cannot be directly used for special tapes and composite processing, which seriously restricts its application range. For example, the application site is directly sprayed with PTFE, which requires professional equipment, special technology, and must be transported to a professional spraying factory for processing, which also restricts its practical application.