Low Density Polyethylene /LDPE
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Copyright 2002 by Roger D. Corneliussen
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Values are from Modern Plastics Encyclopedia 99.
To jump to a particular property, click on the name listed below.
Melt
Flow
Melting
Temperature
Glass
Transition
Processing Molding Pressure
Processing Molding Temperature
Compression
Ratio
Mold
Shrinkage
Tensile
Strength
Elongation
Tensile
Yield Strength
Compressive
Strength
Flexural
Strength
Tensile
Modulus
Flexural
Modulus
Izod
Impact Strength
Hardness
Deflection
Temperature
Thermal
Expansion
Thermal
Conductivity
Specific
Gravity
Dielectric
Strength
Water
Absorption
Note:
The ASTM numbers are linked to
their descriptions on the ASTM website.
To go to the description, simply
click on the ASTM number
Melt
Flow
ASTM D1238
(gm/10 min)
0.25 to 27.0 gm /10 min
Melting
Temperature degrees C
Tm Crystalline
98 to 115 C
Glass
Transition
(C)
Tg (Amorphous)
-25 C
Processing
Temperature
Range Degrees F
Extrusion
300 to 450 F for injection molding
250 to 450 F for extrusion
Molding
Pressure Range ( PSI) (ksi)
5000 to 15 000 psi
5 to 15 ksi
33 to 100 MPa
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Compression
Ratio
1.8 to 3.6
Mold(Linear)
Shrinkage (in/in)
ASTM D955
0.015 to 0.050
Tensile
Strength at Break
ASTM D638
1200 to 4550 psi
8 to 30 MPa
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Elongation
at break (%)
ASTM D638
100 to 650 %
Tensile
Yield Strength (psi)
ASTM D638
1300 to 2100 psi
9 to 14 MPa
Compressive
Strength (psi)
Rupture or Yield
ASTM
D695
--- psi
--- MPa
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Flexural
Strength (psi)
Rupture or Yield
ASTM D790
--- psi
--- MPa
Tensile
Modulus (psi)
ASTM D638
25 000 to 41 000 psi
0.2 to 0.3 GPa
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Modulus
Compressive
Modulus (psi)
ASTM
D695
--- psi
--- GPa
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Flexural
Modulus (psi)
ASTM D790
At 73 F
35 000 to 48 000 psi
0.2 to 0.3 GPa
At 200 F
--- psi
--- GPa
At 300 F
--- psi
--- GPa
Izod
Impact (ft-lb/in of notch)
ASTM D256
(No break) ft lb/in of notch
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Hardness
Rockwell ASTM D785
---
--
Shore D65 ASTM
D2240/D2583
Shore D44-50
Coefficient
of Linear Thermal Expansion
(10 exp-6 )in/in/C
100 to 220 (10 x exp –6) in/in /C
0.000 100 to 0.000 200 in/in /C
Deflection
Temperature under flexural load (F)
ASTM D648
264 psi ---
--- F
66 psi ---
104 to 112 F
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Thermal
Conductivity
(10 x exp –4)al cm/sec cm2 C
ASTM C177
8 (10 x exp –4) cal cm/sec cm2
0.0008 cal cm/sec cm2
Specific
Gravity
ASTM D792
0.917 to 0.932
To go to Density /Specific Gravity Values,
click on
Density
Water
Absorption
(1/8 in thick specimen) (%)
ASTM D570
24 hr --- <0.01 %
Saturation
--- %
Dielectric Strength v/mil
(1/8 in thick Specimen; short time)
450 to 1000 v/mil
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Copyright 2002 by Roger D.
Corneliussen
No part of this transmission is to be
duplicated, in any manor, or forwarded by
electronic mail without the express written
permission of Roger D. Corneliussen
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