Property POLY-
ETHYLENE UHMWPE
PTFE PEEK 450G TORLON 4203 TORLON 4301 PVC PC ABS
Colour Trans.white White Fawn Dark brown Green/Black Grey Clear White
Specific gravity 0.93 2.1-2.3 1.32 1.4 1.45 1.46 1.2 1.05
Water absorption
 Saturation in Water
Non-absorbent <0.02 0.45 3.5 3 0.2 0.35 <0.1
Tensile strength 40 10.0-12.0 92 192 164 48 65 30-45
Tensile modulus 522-690 340/638 3600 4900 6600 3500 2300 2000
Elongation >350 >100/500 50 15 7 120 >50 30
Flexural strength - - 170 244 219 125 100 50
Fexural Modulus 517 - 3660 5000 6900 - - -
Hardness - - M99 E86 E72 - M75 -
Hardness 62 60-65 - - - 84 - 75
Melt point 130 327 334 - - - - -
Max. allowable service temp in air
  For short periods (1)
  Continuously for 20000hrs(2)
Minimum service temperature

80
60
-260

300
250
-260

310
250
-50

260
230-260
-160

260
230-260
-160

130
80
-15

135
115
-60

120
80
-
Linear thermal expansion coefficient 20 10.0-12.0 4.7 3.08 2.52 7.0 6.5 9.0
Thermal conductivity 0.42 0.26 0.25 0.26 0.54 0.14 0.21 0.17
Flammability
  UL (thickness in mm)
Slow Burning
-
Non Flammable
-
-
V-0 (1.45)
-
V-0 (1.17)
-
V-0 (1.17)
-
V-0
-
V-2/V-0
-
-
Volume resistivity >1015 >1018 4.9x1018 2x1015 8x1013 4x1015 > 1018 1015
Dielectric strength (3) 20 > 24 25 23.6 - 20-50 > 30 15
Outside applications - UV resistance D A A C C A D A
Acids - strong (pH <3 ) D A A A A A D B
Alkalis - strong (pH > 11) D A A C C A D B
Chloinated hydrocarbons A A A - - D D C
Hot water D A A E86 E72 A A A
  Ultra-high molecular weight polyethylene exhibits exceptional toughness and a combination of physical and mechanical properties which enable it to perform well under the most rigorous conditions. PTFE offers extreme chemical resistance and a wide operating temperature range combined with excellent dielectric performance and surface properties of low friction and anti-adhesion A high performance engineering thermo-
plastic with excellent thermal, chemical, electrical and mechanical properties.

Hydrolysis resistance and radiation resistance are also very high.
TORLON offers exceptional physical and chemical properties and can withstand continuous exposure to temperatures between 230oC and 260oC.

TORLON 4203 exhibits the best impact performance and optimum mechanical properties.

TORLON 4301 retains a good balance of mechanical properties whilst achieving lower friction and considerably superior bearing performance.
A long established plastic with quite good mechanical properties, PVC is generally chosen when chemical resistance is required at low cost.

It is ideal for prototyping applications and is easily fabricated.
Poly-
carbonate is a virtually un-
breakable optical quality material.

It offers good mechanical strength, exceptional impact resistance, fire resistance and high optical quality.
A strong and rigid thermo-
plastic with high impact strength and excellent thermal forming properties. It is also resistant to many acids
/alkalis of medium con-
centration and a good electrical insulator.