UHMW Polyethylene products originate with the higest grade resins,the molecular weight from 3 million to 9 million, Comparing to any thermo plastics polymer. It has an outstanding plastics properties with the best wear Resistant, Impact Resistant, Self Lubricating, Corrosion Resistant, impact absorbing properties , low temperature resistant, s anitary, Non-caking and sticking, non water absorption, light weight properites, so regarded as an amazing material.
£¨1£©Property
1.Mechanical Properties
Item |
Unit |
Test Method |
Value |
Density |
G/cm 3 |
ASTM1505 |
0.94 |
Tensile Strength at Break |
Mpa |
D638 |
42 |
Elongation at Break |
% |
D638 |
350 |
Izod Impact |
Kj/m 2 |
D256 |
¡Ý100 |
2.Thermal properties
Item |
Unit |
Test Method |
Value |
Melting point |
¡æ |
ASTMD2117 |
136 |
Vicat softening poin |
¡æ |
ASTMD1512 |
134 |
Thermal Expansion Coefficient |
10 £ 4 / ¡æ |
ASTMD648 |
1.5 |
Thermal Deformation Temperatu re |
¡æ |
ASTMD648 |
90 |
3.Electrical properties
Item |
Unit |
Test Method |
Value |
Bulk Resistivity |
Ohm.cm |
ASTMD257 |
10 17 |
Surface Resistivity |
Ohm.cm |
ASTMD257 |
10 13 |
Dielectric Strength |
KV/mm |
ASTMD149 |
900 |
Dielectric Coefficient |
10 6 |
ASTMD150 |
2.3 |
4.Cold properties
UHMWPE molecular weight excess 1.5 million, brittle temperature low to -150 ¡æ¡£ Lab test: working temperature below -269 ¡æ , also have some mechanical strength.
5.Abrasion resistant properties
UHMW-PE with super abrasion resistance, the more molecular high, the more wear resistance has ¡£
Material |
UHMW-PE |
PTFE |
PA66 |
POM |
Carbon stell 45# |
Stainless steel |
brass |
Abrasion rate |
0.74 |
2.31 |
1.51 |
3.1 |
4.02 |
4.05 |
16.74 |
Note abrasion test condition
Samples are abraded in a 3/2 sand/ water (sand 20 mesh),test piece turn speed930 rpm for 7 hours, test piece size: 60mm ¡Á 35mm ¡Á 4mm £¬
Abrasion sheet for different molecular sheet
Molecular weight(million) |
Average Abrasion rate |
9.3 |
0.29 |
7.0 |
0.31 |
5.7 |
0.36 |
4.0 |
0.41 |
3.8 |
0.50 |
2.8 |
0.50 |
1.6 |
0.74 |
6.Impact strength for different material
Material |
UHMW-PE |
HDPE |
ABS |
PA66 |
PC |
POM |
PTEE |
Impact strength Kj/m 2 |
¡Ý 100 |
27 |
16 ¡« 44 |
6 ¡« 11 |
71 ¡« 95 |
8 ¡« 13 |
16 |
Note: test according to ASTMD256
7.Self lubrication
Due to small coefficient of frication, so it has better self lubrication, only less PTFE materil while work. without grease.During the working condition fo slipping or turn, it works better than steel or bronze bearing with grease, in frication field, it's name perfect frication material with low cost.
Material |
UHMWPE |
PA66 |
PC |
ABS |
PTFE |
Rubber sold |
Graphite graphite |
Glass glass |
Steel steel |
Frication coefficient |
0.07-0.11 |
0.37 |
0.36 |
0.38 |
0.04-0.10 |
1-4 |
0.1 |
0.9-1 |
0.58 |
8.Water absorption rate
UHMW-PE's surface absorption affinity is very feeble, materials are difficult to stick to it. UHMW-PE's water absorption is less than 0.01% only 1% that of nylon66,in water environment it's very stable, resists the attached of algae and fungus.
Materil |
UHMW-PE |
ABS |
PA66 |
PC |
POM |
PTEE |
Water absorption rate |
£¼ 0.01 |
0.20 ¡« 0.45 |
1.5 |
0.15 |
0.25 |
£¼ 0.01 |
Note: test method according to ASTM570
9. Excellent chemical Corrosion Resistant
UHMWPE chemical stability is high, it can resist various corrosive media (such as acids , salts and alkalis) and organic solvents in certain range of temperature and concentration
10.Sanitation
The uhmpwe has the property of insipid , non toxic and no causticity itself. It's approved by FDA AND USDA that it could be used in food and pharmacy industry
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