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Unplasticised PVC or uPVC are also the rigid PVC. Pipes of these materials are restricted in some countries like USA due to environmental hazardous during use & manufacturing.

Advantages Cheap, good acid and alkali resistance. Flame-retardant. Stiff and strong. Can be transparent. Good vapour barrier properties. Good UV resistance. Disadvantages Difficult to melt process, requires modification. Limited solvent stress cracking resistance. Becomes brittle at (c 5°C (40°F) ) unless impact modified. Low continuous service temperature of 50°C (120°F).

Applications Pipe and pipefittings, building products e.g. gutters, cladding, window frames. Bottles, film, records, floor tiling

Property Value Density (g/cm3) 1.4 Surface Hardness RR110 Tensile Strength (MPa) 51 Flexural Modulus (GPa) 3 Notched Izod (kJ/m) 0.08 Linear Expansion (/°C x 10-5) 6 Elongation at Break (%) 60 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

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15y ago

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