REGISTER OVERVIEW PLASTICS

PE HD (POLYETHYLENE HIGH DENSITY)
Characteristic properties of PE HD (polyethylene high density)
The properties of polyethylene are primarily determined by the
chain length (degree of polymerisation).
Compared to standard natural and black polyethylenes,
PE HD 500 (HMW) and PE HD 1000 (UHMW) have a higher
molecular weight (M), which can be established via various
methods. According to Margolies' equation (based on viscometric
measurements), the materials are classified as follows:
Standard PE HD natural or black = approx. 250.000 M
PE HD 500 (HMW) = approx. 500.000 M
PE HD 1000 (UHMW) = approx. 4.4 – 8 million M
PE HD standard natural or black
(polyethylene)
Material density: 0.95 g/cm 3
Service temperature: -50 °C to +70 °C
Without significant mechanical stress and with air as the
surrounding medium, up to +80 °C
PE HD is very tough, even at low temperatures, has a low density
(compared to other materials) and impresses with its high
chemical resistance.
• Very good electrical insulating properties
• Good sliding properties
• Almost no moisture absorption
• Combustible according to DIN 4102 B2
• Physiologically indifferent (compatible with foodstuffs)
• Anti-adhesive properties (so 100 % sticking not possible)
Comment:
PE natural is intended exclusively for indoor use.
PE black is specially UV-stabilised for outdoor use.
Pressed boards have fewer stresses compared to extruded boards,
so priority should be given to them for milled parts.
Grades:
Extruded and pressed design/colour natural/black
Other grades/modifications on request
Application:
Machine tools, chemical equipment and laboratory construction,
electroplating technology, use wherever physiological safety is
required.
Processing:
Hot forming, welding, machining,
Sticking properties: high bonding strength not possible
Printing: surface pre-treatment required
Dimensions:
Boards 0.5 – 50 mm extruded design –
Dim. 2000 x 1000 mm
10 – 200 mm pressed design –
Dim. 2000 x 1000 mm
Other board sizes on request
Round rods: 8 – 500 mm diameter, lengths of 1000/2000 mm
Tolerances: see technical knowledge
Standard tolerances for thermoplastic/thermosetting plastic
materials
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In addition to the general characteristics of standard PE HD,
such as
• Good resistance to stress cracks
• No water absorption
• Compatible with foodstuffs
• Excellent electric and dielectric properties
• Good processability and machinability
• Chemical resistance
as the molecular weight of HMW PE HD types increases, so a
number of the material properties improve. For example:
• Notch toughness
• Resistance to stress cracking
• Tearing strength/elongation at tear
• Rigidity and abrasion also decrease as the molecular weight
increases
PE HD 1000 (UHMW) (polyethylene)
Material density: 0.94 g/cm 3
Service temperature: –200 °C to + 70 °C
An increase of around 10 % is permissible, provided that the parts
are not subject to significant mechanical stress.
PE HD 1000 (UHMW) features high impact strength and notch
toughness even at low temperatures, as well as a high tearing
strength and elongation at tear with optimum long-term behaviour.
This material will not be destroyed by slow or sudden stresses.
• Very low wear, abrasion-resistant
• Good sliding properties, prevents sticking
• Almost no moisture absorption
• Combustible according to DIN 4102 B2
• Physiologically indifferent (compatible with foodstuffs)
• Anti-adhesive properties (so 100 % sticking not possible)
Comment:
PE HD 1000 UHMW natural is not specially stabilised for outdoor
use and, as such, is intended for indoor applications.
PE HD 1000 UHMW black is specially UV-stabilised for outdoor use.
Pressed boards have fewer stresses compared to extruded boards,
so priority should be given to them for milled parts.
Grades:
Extruded/sliced and pressed boards
Colour natural/black/green
Special types modified for parts subject to high stresses on
request
Round rods ram extruded/extruded design
Application:
Machine tools, chemical equipment construction, electroplating
technology, use wherever physiological safety is required and
where sliding properties are necessary along with optimum wear
resistance, e.g. hopper linings
Processing: see PE HD
Dimensions:
Boards: Thicknesses of 1 – 8 mm = extruded or sliced boards
10 – 120 mm = pressed/extruded boards
Storage dimensions 2000 x 1000 mm,
other dim. on request
Round rods: 20 – 350 mm D
Tolerances: see technical knowledge
Standard tolerances for thermoplastic/thermosetting plastic
materials