The invention discloses a manufacturing method of a
polytetrafluoroethylene sealing sheet or sealing strip for an aircraft hatch cover.
Polytetrafluoroethylene dispersion resin with the molecular weight of 30000 or above is selected as a
raw material,
aviation kerosene is added and mixed, the mixture is put into a
thermostat for heat preservation, a blank is made in a knocking mode, the blank is put into the
thermostat for heat preservation,
extrusion molding is carried out to form a blank, the blank is extruded into a strip-shaped flat blank,
degreasing and unidirectional stretching are carried out, the flat blank is put into the
thermostat, a
film material is formed after bidirectional stretching, the
film material is moved into a setting furnace for setting and rolled, and multiple
layers of the film materials are overlapped, put into a bulking furnace for bulking, and compounded to form an integrated wide
sheet material, the wide
sheet material is
cut into needed flaky or strip-shaped product specifications, and packaging and warehousing are carried out after quality inspection. The whole
processing technology is beneficial to continuous and batch work of a
production line, production efficiency is high, the quality is guaranteed, the main performance indexes are superior to those of existing similar products, and high-quality sealing materials are provided for aircraft andother
aviation and
aerospace equipment.