Metal filling modified polytetrafluoroethylene gasket and preparation method thereof

The invention discloses a metal filling modified polytetrafluoroethylene gasket and a preparation method thereof, the gasket is formed by adopting cold press forming and hot sintering processes, nickel powder is adopted as a metal filling agent, and the weight percentage of the nickel powder to polytetrafluoroethylene is in a range of 0.9: 1-1: 1; the preparation method comprises the following steps: uniformly stirring a mixture of Ni powder and polytetrafluoroethylene which need to be pressed, adding the mixed material into a mold, and striking off the powder; placing the filled mold on a flat plate molding press for cold press molding to form a green body; standing the green body for half a day, placing the green body in a temperature-controlled oven for hot sintering, and cooling to obtain a metal filling modified polytetrafluoroethylene gasket blank; the modified composite material has good hardness and fatigue resistance. 本发明公开了一种金属填充改性聚四氟乙烯垫圈及其制备方法，采用冷压成型和热烧结工艺成型，采用镍粉作为金属填充剂，镍粉与聚四氟乙烯的重量百分比为：0.9:1～1:1范围内