Engineering plastics – The Manual - F.wood-supply.dk

H
C
H
H
C
n
CH 3
80
CH 3
O
C
O S
CH 3 O
O n
PP
60
PSU
40
N
m
CH 3
O
n
CH 3
PPO Structural > PPE? formula PPE
• Stress [MPa]
20
F F
0
C C
0 5n
10 15
20
• Strain [%] F F
TECANYL 731 grau
TECANYL GF 30 TECANYL GF30
TECANYL PTFE 731 grey
TECANYL
S
n
H
C
H
F
C
F
n
PPS
PPE (DIN designation)
Polyphenylene ether (PPE) is an amorphous standard thermoplastic.
PPE is usually only used when modified by the
addition of PA or PS. By varying the proportion of the components,
different modifications can be created to withstand
higher thermal and mechanical loads. However,
these have a negative impact or processability. As a result of
modification and the addition of fillers such as glass fibre,
the mechanical properties of the material can be varied
even further.
Properties
ˌˌAmorphous
ˌˌLow density, little over 1 g/cm³
ˌˌHigh toughness, strength, hardness and rigidity
ˌˌCreep resistant
ˌˌGood chemical resistance
ˌˌTendency to stress crack formation
ˌˌGood thermal stability
ˌˌVery low moisture absorption
ˌˌVery good dimensional stability
ˌˌVery low dielectric constant
Values
TECANYL 731 grey (PPE)
T g 145 °C
Density 1.10 g/cm 3
Modulus of elasticity
2,400 MPa
Service temperature, long-term 85 °C
Service temperature, short-term 110 °C
Lower service temperature –50 °C
PVDF
Identifying characteristics
ˌˌColour grey
ˌˌVery low flammability, sooting
ˌˌBurns with a blue flame with yellow tip
ˌˌFoul odour on thermal
ˌˌDensity little over 1 g/cm³ – floats in saline solution
ˌˌVery scratch-resistant, hard
ˌˌDissolvable with acetone / benzene
Products / Modifications
TECANYL 731 grey (PPE)
Unreinforced basic type
TECANYL MT (PPE)
Wide range of colours available for
medical technology, biocompatible
TECANYL GF30 (PPE GF)
Glass fibre reinforced for high
strength, rigidity, high heat
deflection temperature, low
thermal expansion for precision
and electrical insulating parts
Application examples
Electrical insulation components with flame-retardant
types, structural components with low warpage, scratchproof
high-gloss exposed parts (housing components for
home electronics), coil formers for satellite technology,
housings for railway track sensors, electrical adapters for
underwater cable connectors used in oil and gas pipeline
technology
Summary
Due to its high dimensional stability and good impact
strength, PPE is more suited than other standard plastics
for use in housing components, also those exposed to high
levels of stress. Consequently this material provides scope
for the low-cost manufacture of suitable components.
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