The role of bronze powder in PTFE products
发表时间：2016-1-14 14:51:41 浏览次数：1793
PTFE. The fine resin with the average particle size of 10-50um should be produced by suspension polymerization. Because the resin particle size of PTFE products filled with density and mixing effect plays an important role in the resin particle is small, the products are dense, mechanical strength, wear resistance is better. At the same time fine resin particle dispersion and liquidity better, the relative increase of the contact area of the resin and the filler, thus increasing the uniformity of mixture. The resin must be dried before use, after cooling and crushed, with 7.87 mesh number /cm (20 mesh) mesh sieve.
The main function of bronze powder is to improve the thermal conductivity of the products. Must be dried before use, and then by 39.4 mesh number /cm (100 mesh) mesh sieve, gross
Copper particles.
Glass fiber. The main function of the glass fiber is to enhance the wear resistance and improve the dimensional stability. PTFE products should be selected alkali free advanced glass fiber. Before use, must be dried on glass fiber, and then by 39.4 mesh number /cm (100 mesh) mesh sieve. Glass fiber acid is strong, but can be eroded by alkaline substances, which should be paid attention to in the use of.
The graphite. Colloidal graphite is a layered crystal structure of high efficient solid lubricant, and has the very high abrasion resistance, compression resistance, resistance to high temperature (up to 540 DEG C), chemical stability, and also has excellent electrical conductivity and thermal conductivity. Graphite particle diameter is less than 30um, the maximum filling amount is 15%, should avoid the filling amount is too large, due to compaction, sintering after the graphite layer between the layer and the layer will lead to the cracking of products.
The molybdenum disulfide. MoS2 is a solid lubricant, it can maintain good lubrication properties at -60-400 deg.. The main purpose of adding MoS2 filled PTFE products is to increase the surface hardness of products, reducing the initial amount of wear.
(2) major equipment. The main production equipment filled PTFE products 50L high speed mixer, IOOt plastic hydraulic machine, high temperature sintering box. Due to the high temperature PTFE will release of highly corrosive gases, mold needs high temperature resistance, corrosion resistance, good berate, the material is available in carbon steel, alloy structural steel, alloy tool steel.
