PVC

Polyvinyl chloride (PVC) is a flexible or rigid material that is chemically non reactive. PVC has a broad range of applications, from high volume construction related products to simple electric wire insulation and coatings. Rigid PVC is easily machined, heat formed, welded, and even solvent cemented. PVC can be machined using standard metal working tools and finished to close tolerances and finishes without great difficulty. PVC accepts paint and performs well under most silk screening processes. PVC resins are normally mixed with other additives such as impact modifiers and stabilisers, providing hundreds of PVC based materials with a variety of engineering properties.

Available PVC Products:
Grey rigid sheet, clear rigid sheet, clear thin film, clear strip door curtains, clear plasticised rolls, grey rod, pipe, clear pressure pipe

Properties:
High strength, economical, dimensional stability, good weather resistance, high impact strength, clarity, colourability, flexible or rigid, chemically inert, ease of fabrication, tasteless, odourless, non-toxic, good electrical properties

Applications:
Acid resistant trays, laboratory equipment, ducting, tanks, pipes, tank liners.


Typical properties of PVC

 ASTM Test
      Propert
 Value
 
 
 Physical
 
 D792 Specific gravity
 1.30-1.58
 D570 Water absorption, 24 hoursm 3.0mm think (%)
 0.2
 ºC Maximum service temp
 +60
 ºC Minimum service temp
 -15
 D792 Specific volume (in.³/lb.)
 20.5-19.1
 Mechanical
 
 D638 Tensile strength at yield N/mm2
57
 D638 Elongation at yield (%)    
3
 D638 Tensile strength at break N/mm2
30
 D638 Elongation at break(%)
20
 D785
Hardness
Impact strength mj/mm2
65-85D
No rupture
 D256
Notched impact strength mj/mm2
Ball indentation hardness N/mm2
8
120
 D790
Flexural strength N/mm2
90
 D638
Modulus of elasticity N/mm2
3000



Thermal


C177
Thermal conductivity at 20°C
0.14
D696
Coefficient of thermal expansion K-1.10-4
0.8
D648
Deflection temperature °C
72
D1525
Vicat softening temperature °C
75



Electrical


D150
Dielectric constant At 1kHz
3
D150
Dissipation loss factor At 1kHz
0.01
D257
Volume resistivity (ohm-cm)
10.15
D257
Surface resistancy (ohm)
10.13
D495
Arv resistance(s)
60-80
Fabrication



Welding temperature °C
220

Forming temperature °C
130

These values are representative of those obtained under standard ASTM conditions and should not be used to design parts which function under different conditions.

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