HIGH MOLECULAR WEIGHT POLYETHYLENE HMW-PE500
|
Polyethylene & polypropylene are members of the
polyolefine family of thermoplastics. The
various grades of these materials have similar
properties. Compared to other types of
thermoplastic they all have low densities and
negligible water absorption. Polyolefines have
very good resistance to chemicals, this means
whilst ideal for manufacturing tanks, tubs and
baths they are practically impossible to solvent
bond or glue. Engineering & Design Plastics
offer a fabrication service in polypropylene and
HD-PE300 by hot air welding the parts together.
HMW-PE500
is generally supplied in sheet form already
planed to close tolerances and can perform at
temperatures as low as -50şC. It also boasts a
higher wear resistance than PE 300 giving it a
wider range of applications within all aspects
of industry. PE 500 is widely used for its
impact resistance in applications such as
cutting boards, fenders, hand rails and
protection strips where repeated impact is
expected.
|
|
Main
characteristics
-
Good wear
resistance (UHMW-PE1000
is better)
-
Good
Abrasion resistance (UHMW-PE1000
is better)
-
High
impact strength, even at low temperatures (UHMW-PE1000
is better)
-
Excellent
chemical resistance
-
Low
density compared to other plastics
-
Low
coefficient of friction
-
Excellent
Release properties
-
Very low
water absorption
-
Physiologically inert (suitable for food
contact)
-
Moderate
mechanical strength, stiffness & creep
resistance
-
Very good
electrical insulation and dielectric
properties
-
Excellent
machinability
-
Not
self-extinguishing
-
Good
resistance against high energy radiation
|
|
|
HMW-PE500 High Molecular Weight
Polyethylene available
Natural, Black, Yellow, Blue,
Red, Green Pressed and planed sheet 10mm-100mm
PROPERTIES |
|
|
|
HMW-PE500 |
|
Specific gravity |
DIN 53479 |
g/cm3 |
0.95 |
|
Water absorption |
DIN 53495 |
% |
0.01 |
|
Chemical resistance |
DIN 53476 |
- |
- |
|
Permissible service
temperature (no stronger mech. stress involved) |
|
|
|
|
Upper temperature limit |
- |
oC |
90 |
|
Lower
temperature limit |
- |
oC |
-50 |
|
|
|
|
|
|
Tensile strength at yield |
DIN 53455 |
MPa |
>28 |
|
Elongation at yield |
DIN 53455 |
% |
0.8 |
|
Tensile strength at break |
DIN 53455 |
MPa |
36 |
|
Elongation at break |
DIN 53455 |
% |
>50 |
|
Impact strength |
DIN 53455 |
KJ/m2 |
No break |
|
Notch impact strength |
DIN 53455 |
KJ/m2 |
No break |
|
Ball indentation
hardness/Rockwell |
DIN 53456 |
MPa |
45 |
|
Modulus of elasticity |
DIN 53457 |
MPa |
800 |
|
|
|
|
|
|
Vicat softening temp. VST/B/50 |
DIN 53460 |
oC |
76 |
|
Heat defection temp. HDT/B
HDT/A |
DIN 53461 |
oC |
- |
|
Coef. of linear thermal
expansion |
DIN 53752 |
K-1 x 10-4 |
2 |
|
Thermal conductivity at 20oC |
DIN 52612 |
W/m.K |
0.41 |
|
|
|
|
|
|
Volume resistivity |
DIN 53482 |
Ohms.cm |
>1017 |
|
Surface resistivity |
DIN 53482 |
Ohms |
1014 |
|
Dielectric constant at 1 MHz |
DIN 53483 |
- |
2.3 |
|
Dielectric loss factor |
DIN 53483 |
- |
- |
|
Dielectric strength |
DIN 53481 |
kV/mm |
100 |
|
Tracking resistance |
DIN 53480 |
- |
KB>600 |
|
|
|
|
|
|
Bondability |
- |
- |
Not practical |
|
Coef. of friction |
DIN 53375 |
- |
0.25 |
|
Flammability |
UL 94 |
- |
HB |
|
UV stabilisation |
- |
- |
No |
|
Acid resistance |
- |
- |
Yes |
|
Hydroxide resistance (dilute) |
- |
- |
Yes |
|
Hydrocarbon resistance |
- |
- |
Yes |
|
CKW resistance |
- |
- |
No |
|
Aromatic resistance |
- |
- |
limited |
|
Ketone resistance |
- |
- |
yes |
|
Resistance against hot water |
- |
- |
limited |
|
|
This table is a meant as an
aid to help in the choice of a material. The data listed
here fall within the normal range of products
properties, but they must not be used to establish
material specification limits nor used alone as the
basis of design. |
A list of the most common Sizes etc that
are readily available as standard items can be down loaded
here
The information given here is
believed to be correct, but
completeness and accuracy are
not guaranteed. The user shall
be fully responsible for
determining the suitability of
products for the intended use.
|
|
|
|
|