Unplasticised Polyvinyl Chloride - Unplasticised PVC - UPVC UV Stabilised

Aug 30 2001

Polymer Type

Thermoplastic

Advantages

Excellent weatherability compared with unmodified uPVC. Depending on choice of stabiliser package, lubrication, electrical properties and weldability can all be improved. Non-toxic packages are available, as are packages that retain the material clarity.

Disadvantages

Discolouration of some PVC products for medical use when sterilised by gamma radiation. Possible sulphide staining with stabilizers based on cadmium or lead - a coloured strain can develop on contact with sulphur components. Slightly reduced tensile strength, modulus and notched izod impact strength compared with unmodified uPVC.

Typical Properties

Property

Value

Density (g/cm3)

1.4

Surface Hardness

RR108

Tensile Strength (MPa)

45

Flexural Modulus (GPa)

2.9

Notched Izod (kJ/m)

0.06

Linear Expansion  (/°C x 10-5)

6

Elongation at Break (%)

50

Strain at Yield (%)

3.5

Max. Operating Temp. (°C)

50

Water Absorption (%)

0.1

Oxygen Index (%)

45

Flammability UL94

V0

Volume Resistivity (log ohm.cm)

14

Dielectric Strength (MV/m)

14

Dissipation Factor 1kHz

0.025

Dielectric Constant  1kHz

3.1

HDT @ 0.45 MPa (°C)

70

HDT @ 1.80 MPa (°C)

67

Material. Drying  hrs @ (°C)

2 @ 75

Melting Temp. Range (°C)

150 - 220

Mould Shrinkage (%)

0.4

Mould Temp. Range (°C)

20 -  40

Applications

Gutters, gutter fittings, window frames, battery cases, housings for VDU's, computers and keyboards. Plastic sacks.

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

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