PTFE gasket introduction
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).
Teflon itself is not toxic to humans, but one of the raw materials used in the production process, PFOA, is thought to be carcinogenic.
Its birth has solved many problems in the fields of chemical industry, petroleum, pharmacy and so on. It has been widely used as sealing material and filling material.
Two, PTFE gasket performance advantages
High temperature - working temperature of 250 degrees C.
Low temperature resistance - with good mechanical toughness; even if the temperature drops to -196 DEG C, can also maintain a 5% elongation.
Corrosion - resistant to most chemicals and solvents, inert, strong acid, strong alkali, water and various organic solvents.
Weather resistant - Best aging life in plastics.
High lubrication - the lowest coefficient of friction in solid materials.
Non adhesion is the smallest surface tension of solid materials, does not adhere to any substance.
No toxicity - with physiological inertia, as artificial blood vessels and organs for long-term implantation without adverse reactions.
PTFE as sealing material has many kinds of application. Because of its high corrosion resistance, stable physical properties, high and low temperature, it has a good sealing performance, in the petroleum, chemical, pharmaceutical, power, steel industry has a wide range of applications. Applicable medium including water, oil, acid solution, alkali solution and almost all chemical components.
Soft PTFE 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 - 250 C
Applicable medium: PH 0-14
Conventional size: 1250mm*1800mm thick 1-5mm
Pure plate OTH-2100
Three, the process of PTFE gasket
1) raw material preparation; ingredients: pure F4 products, raw materials F4 fine resin, mash, sieve
2) mold preparation: wipe with alcohol, no rust, no attachment
3) weighing, according to formula G=PV (where G is the amount of feed, P for the pre product density (2.18g/cm3)
V weight of product size.
4) feeding: F4 resin evenly distributed on the entire surface.
5) pre forming (suppressed): calculated according to the formula set press press gauge, gauge. Suppress
6 stripping and trimming: the semi-finished products removed from the mold, the surface trim, so that its surface smooth, neat edges. Ready molding.
7) sintering: half finished slowly into the furnace, put appropriate amount, about an hour up to 390 degrees, and then holding an hour about molding began to cool, about four hours after the arrival of the indoor temperature, the finished product released, finally completed setting