Carbon/graphite/glass fiber/copper filling Teflon plate , rod, tube, non-standard seal
1、 Inorganic materials
1. Glass fiber powder: white, with a density of 2.3g/cm3, has good mechanical properties. Adding glass fiber can correct the compressive strength, abrasion resistance, dimensional stability, strong acid resistance, strong oxidant, but is not resistant to hydrofluoric acid and alkali
2. Graphite: iron black to dark iron gray, is a crystalline carbon, belonging to hexagonal crystal system, in the form of leaves, with a sense of smoothness in contact, with a density of 2.09-2.25g/cm3. It has good conductivity, plasticity, lubricity, abrasion resistance, chemical resistance requirements, especially corrosion resistance gas erosion, which can improve cold flow resistance and reduce initial wear
3. Molybdenum disulfide: black gray with silver gray powder, metallic luster, density of 4.6 * 4.8g/cm3, hexagonal layered structure, smooth contact, low friction coefficient, good thermal conductivity. Molybdenum disulfide can increase surface hardness and reduce initial wear, generally used with glass fiber and bronze powder
4. Carbon fiber powder: black, with a density of 1.78g/cm3, has good high and low temperature resistance, thermal conductivity, chemical resistance, abrasion resistance, tensile strength and elongation, superior to graphite and other fillers, creep resistance, and can improve the abrasion resistance of filled PTFE products in air and water
5. Special fiber: grayish brown, with a density of 2.65g/cm3, the main performance has excellent high temperature resistance and ultra-low temperature performance, which can be used at - 269~700 ℃, excellent thermal stability and chemical stability, acid and alkali resistance consistent with carbon fiber, and good electrical insulation and corrosion resistance.
2、 Metallic materials
1. Bronze powder: 6-6-3 tin bronze powder, with a density of 8.8g/cm3. It mainly provides wear resistance, creep resistance, compressive strength, hardness and dimensional stability of products. Good thermal conductivity, which can provide the mechanical strength of products
2. Stainless steel powder: gray, - 500 mesh, with a density of 7.85-8.1g/cm3. The density of 316 stainless steel powder is 8.03g/cm3, which can improve the mechanical properties, dimensional stability, chemical resistance and wear resistance of products
3、 Organic materials
1. Polyphenylene ester: light yellow powder, density of 1.45g/cm3, unit temperature of 530 ° C, long-term use at 300 ° C, with excellent self-lubricating, temperature resistance, wear resistance and thermal conductivity. And teflon The composite has high temperature resistance, self lubrication, compression creep resistance, good dimensional stability, and is ideal for low friction and wear resistance engineering plastic Products, especially used as bearing materials.
2. Para polyphenylene: brown or dark brown powder, density 1.24g/cm3, high temperature resistance, radiation resistance, chemical corrosion resistance, self-lubricating performance, due to graphite and molybdenum disulfide
Filled poly Tetrafluoroethylene products Performance of
The main properties of polytetrafluoroethylene resin modified by adding different proportions of glass fiber, carbon fiber, graphite, bronze powder, molybdenum disulfide, polyphenyl ester, para polyphenylene and other fillers are as follows: abrasion resistance can be increased by about 1000 times, creep resistance can be increased by 2-3 times, bending elastic modulus can be increased by 2-3 times, thermal conductivity can be increased by 2 times, hardness can be increased by 10-30%, and linear expansion coefficient can be reduced by 1/2. The negative effect is that the void ratio increases, the water absorption increases, and the dielectric property decreases.
