Introduction of imported polytetrafluoroethylene gasket
Polytetrafluoroethylene (English abbreviated to Teflon or PTFE, F4), because of widely known as "king of plastic", Chinese, known as the "TEFLON" and "TEFLON" and "TEFLON" or "special Aussino" and "TEFLON" etc..
PTFE is a polymer compound by the polymerization of tetrafluoroethylene, has excellent chemical stability, corrosion resistance (resistance is one of the world's one of the best corrosion resistance of molten metal and liquid materials except Na fluorine, can all other chemicals in the aqua regia boiling also can not change, widely used in a variety of needs the acid and alkali resistance and organic solvent conditions), seal, Gao Runhua inadhesion, electrical property and good aging resistance, high temperature insulation of large span (can work at +250 DEG to -180 DEG C temperature for a long time).
Polytetrafluoroethylene (polytetrafluoroethylene) itself is not toxic to people, but one of the raw materials used in the production process, perfluorooctanate (PFOA), is considered to be carcinogenic.
Its birth has solved many problems in the world of chemical, petroleum, pharmaceutical and other fields. It has been widely used as a sealing material and a filling material.
Two. Performance advantages of imported polytetrafluoroethylene gasket
High temperature resistance - the working temperature is 250.
Low temperature resistance - good mechanical toughness; even if the temperature drops to -196 C, it can also maintain a 5% elongation.
Corrosion resistance - to most chemicals and solvents, it shows inertia, strong acid and strong alkali, water and various organic solvents.
Climate resistance - the best aging life in plastic.
High lubrication - the lowest coefficient of friction in solid materials.
Non adhesion - the smallest surface tension in the solid material, which does not adhere to any substance.
No toxicity - it has a physiological inertia and has no adverse reaction in the long term implantation of artificial blood vessels and organs.
Polytetrafluoroethylene (PTFE) has many applications as sealing materials. Because of its high corrosion resistance, stable physical properties, high and low temperature resistance, it has achieved good sealing performance. It has been widely applied in petroleum, chemical, pharmaceutical, power and steel industries. The applicable medium includes almost all chemical components, such as water, oil, acid solution, alkali solution and so on.
The soft polytetrafluoroethylene is refined. Durable, reliable sealing performance; PTFE itself has the optimum corrosion resistant and aging resistance, after special processing has good creep resistance and cold flow; long-term use of safety in a wide temperature range; soft and easy to cut through the mechanical or hand cut, easy to install.
Appearance color: white.
Applicable temperature: -180 C - 250 C
Suitable medium: PH 0-14
Conventional size: 1250mm*1800mm thick 1-5mm
Pure sheet OTH-2100
Three. Polytetrafluoroethylene gasket for imported process
1) raw material preparation; ingredients: pure F4 products, raw material F4 fine resin, mashed, screening
2) mold preparation: clean with alcohol, no rust in the die, no attachments
3) weighing, according to formula G=PV (where G is the amount of feed, P is the preproduct density (2.18g/cm3)
V is weighed for the volume of the product.
4) feed: the F4 resin is evenly distributed over the entire surface of the press.
5) pre forming (suppressed): calculated according to the formula set press press gauge, gauge. Suppress
6) demoulding trimming: the semi-finished product is removed from the mold and the surface is trimmed to make the surface smooth and the edge is neat. Prepare to form.
7) sintering: put the semi-finished products into the sinter furnace and put them in a suitable quantity, and heat them for an hour to about 390 degrees, and then heat for one hour. After about four hours, the temperature will start to cool down, and then the indoor temperature will be reached, and the final products will be finished.