Engineering plastics â The Manual - F.wood-supply.dk
Engineering plastics â The Manual - F.wood-supply.dk
Engineering plastics â The Manual - F.wood-supply.dk
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O<br />
O<br />
O<br />
O<br />
O<br />
C<br />
C<br />
C<br />
C<br />
C<br />
CH 3<br />
n<br />
-R N<br />
N -R<br />
n<br />
C<br />
C<br />
N<br />
C<br />
C<br />
N<br />
m<br />
40<br />
O<br />
n<br />
O<br />
O<br />
O<br />
O<br />
CH 3<br />
PI<br />
30<br />
PPO > PPE?<br />
20<br />
C H 3<br />
H<br />
H<br />
C C<br />
n<br />
CH 2 H<br />
CH<br />
CH 3<br />
PMP Structural formula PMP<br />
• Stress [MPa]<br />
10<br />
0<br />
0 20S<br />
40 60<br />
80<br />
n<br />
• Strain [%]<br />
TECAFINE PMP<br />
TECAFINE PPS PMP<br />
TECAFINE PMP<br />
PMP (DIN designation)<br />
Polymethylpentene (PMP) is a thermoplastic belonging to<br />
the polyolefine group. With a density of 0.83 g/cm³, it is the<br />
lightest of all the <strong>plastics</strong>. Despite its partially crystalline<br />
structure, PMP has a clear/transparent appearance.<br />
Properties<br />
ˌˌSemi-crystalline<br />
ˌˌTransparent<br />
ˌˌLowest density of all <strong>plastics</strong><br />
ˌˌHigh toughness, strength and hardness<br />
ˌˌGood resistance to chemicals<br />
ˌˌStress crack resistance better in some<br />
cases than with other transparent <strong>plastics</strong><br />
ˌˌWater absorption can result in deformation<br />
ˌˌLimited resistance to hydrolysis<br />
ˌˌGood thermal stability<br />
ˌˌGood gamma and X-ray resistance<br />
ˌˌVery good electrical insulation properties<br />
ˌˌVery low dissipation factor<br />
ˌˌOutstanding optical properties<br />
Values<br />
TECAFINE PMP (PMP)<br />
T g 20 °C<br />
Density 0.83 g/cm 3<br />
Modulus of elasticity<br />
1,000 MPa<br />
Service temperature, long-term 120 °C<br />
Service temperature, short-term 170 °C<br />
Lower service temperature –20 °C<br />
Identifying characteristics<br />
ˌ ˌ Colour opaque / slightly yellowish<br />
ˌˌHigh flammability<br />
ˌˌBurns with a blue flame with yellow tip<br />
ˌˌMinimal or no sooting<br />
ˌˌWaxy odour<br />
ˌˌDensity < 1 g/cm³, floats in water<br />
ˌˌRelatively soft, can be scored with a fingernail<br />
Products / Modifications<br />
TECAFINE PMP (PMP)<br />
Transparent, also in the UV range.<br />
Very good electrical insulation.<br />
Application examples<br />
Medical technology: various injection mouldings for connecting<br />
and distributor elements used in parts for drip<br />
feeding, injections, various household appliances; Electrotechnical<br />
accessories, high-frequency technology, coil<br />
cores, aerial supports, lenses for ultrasound applications<br />
Summary<br />
Higher strength and thermal stability levels than PE. <strong>The</strong><br />
crystallite size is lower than the wavelength of the light, permitting<br />
very good transparency. Better light transmission<br />
in the visible area than with optically highly transparent<br />
<strong>plastics</strong> such as PMMA or PC.<br />
15
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