What is the difference between “maximum moisture absorption” and “maximum water absorption” on the material data sheet? – igus Blog

What is the difference between “maximum moisture absorption” and “maximum water absorption” on the material data sheet?

Lars Butenschön | 9. July 2019

What is the difference between “maximum moisture absorption” and “maximum water absorption” on the material data sheet?

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The test of “maximum moisture absorption (at 23° C/73° F, 50 % r.  h.)” is a testing method according to DIN 53495 and provides information on the amount (namely the increase in volume of the component)l of moisture absorbed from the air. The information in brackets describes the air temperature and humidity, whereas “maximum water absorption” means the change in volume due to the moisture absorbed in direct contact with water. This involves the bearing being immersed in water and taken out again after 24 hours.

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