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Home / Materials Selection / Properties of Engineering Plastics

Water Absorbsion

 

Material Water Absorbsion. Rating Comments
UHMWPE
Very low
Water absorption virtually nil
HMWPE
Very low
Water absorption virtually nil
HDPE
Very low
Water absorption virtually nil
High Perform. Mats
Various
PTFE (Virgin)
Very low
Water absorption virtually nil
Polypropylene
Very low
Water absorption virtually nil
Acetal
Very low
First choice for wet applications where tight tolerances are required
PETP
Very Low
PETP should not be used in water above 70°C as it becomes brittle
Polyurethane
Low
PVC
Low
Polycarbonate
Low
Water absorption rate of approx. 0.35%
Acrylic
Low
Water absorption rate of approx. 0.35%
Bakelite
High
Water acts as a lubricant, but allowance must be made for swelling as material absorbs moisture
Nylon 66SA
High
Water absorption rate of approx. 8%

 

Materials have been colour-coded based on their maximum continuous operation temperature in °C in air. Coding is as follows:

 

260 250 130 121 110 110 95 90 90 85 80 80 60 50

 

For more details see Min/Max Operating Temperature.

 

For a detailed specification sheets on plastic materials, or more specific information on materials and their properties please contact us.



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