PTFE ( polytetrafluorethylen ) – is fluoropolymer with excellent characteristics.
· High continual temperature resistance until 250°C (for a short time 280°C), temperature degradation start at about 350°C
· Good frost resistance until –200°C (PTFE foil are flexibility to –150°C)
· PTFE material has high tensile strength, good flexibility including minus temperature, at high wing loading is not to be crush. (Cold fluid polymer)
· With its non-polar structure is one of the best dielectric materials.
· Excellent chemical resistance in al range of pH. It is stable in boiling nitric acid, aqua-regia, resistance to halogens, alkali and majority organic solvents. Not until temperature 200°C is attack melting alkaline metals, fluorine and fluorine hydrocarbons.
· It is extreme resistance climatic conditions during 30 years.
· Next its invaluable character with low friction coefficient, therefore it use for produce bearing.
· It don’t stick with all plasticators and it has markedly anti-adhesive properties.
· It don’t resistance high energetic radiation (depolymerize).
Type and diameter PTFE semi-products
Rods
extruded diameter from 3 to 200 mm, length 1000/2000 mm
molded diameter from 20 to 775 mm, length 300 mm
Sheets
skived thickness from 0,5 to 5 mm
molded thickness from 5 to 150 mm
Size 1000*1000, 1200*1200 mm
Tubes
extruded diameter from 10 to 150 mm, length 1000 mm
molded diameter from 25 to 1440 mm, length 300 mm
Physical Properties
Property |
Unit |
Value |
Density |
g / cm3
|
2,13 – 2,18 |
Tensile strength |
kg/cm2 |
≥200 |
Elongation |
% |
≥250 |
Impact strength |
Kg*cm/cm2 |
≥13 |
Compressive strength (1% deformation) |
kg / cm2 |
≥40 |
Coefficient of thermal conductivity |
Kcal / m*h |
0,21 |
Volume resistivity |
Ohm*cm |
≥1018 |
Surface resistivity |
Ohm |
≥1017 |
Dielectric strength |
kV / mm |
≥60 |