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Polytetrafluoroethylene (PTFE) shows a remarkable
chemical resistance and it is insoluble in all known solvents. It is
attacked only by molten alkali metals and by fluorine at high
temperatures. PTFE is incombustible and may be used up to 260°C (300°C
for short periods). PTFE's coefficient of friction is extremely low and
it shows the effect of self lubrication with constant mechanical
properties which makes it particularly suitable for bearings, joints,
O-rings, stirring bars, hazardous materials bottle pouers, syringes,
crucubles, evaporating dishes etc. PTFE may be shaped by compression and
sintering into bottles and beakers where its chemical stability and
non-wettability make it suitable for use in extreme circumstances.
Non-sticking PTFE syringes are virtually immune to
chemical attack with a working temperature from cryogenic to 260°C.
PTFE Resistance:
Excellent resistance (no attack) to Dilute and
Concentrated Acids, Alcohols, Aldehydes, Bases, Esters, Aliphatic,
Aromatic and Halogenated Hydrocarbons, ketones, Mineral Oils, Vegetable
Oils and Oxidizing Agents.
PTFE Quick
Facts:
Maximum
Temperature: 572°F 300°C
Minimum
Temperature: 392°F -200°C
Autoclavable:
Yes
Melting Point:
626°F 330°C
Tensile
Strength: 6,240 psi
Hardness: R58
UV Resistance:
Excellent
Opaque
Rigid
Specific
Gravity: 2.2
PTFE Fabrication:
A truly amazing material. The lowest coefficient of friction of any
solid. Excellent choice for gaskets, rings, and bearings. Can't be
easily glued or welded. Machines easily when chilled. Available in many
forms and shapes. PTFE is virtually impervious to chemical attack.
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