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NWSP 80.10 Coverstock Wetback

Standard:

NWSP

Method:

NWSP 80.10

Title:

Nonwovens Coverstock Wetback

Scope

The NWSP 80.10 Coverstock Wetback test method measures the ability of diaper coverstock to resist the transport back onto the skin of a liquid which has already penetrated the coverstock.

The test method is intended for quality control use only and is designed for comparison of wetback for different nonwoven coverstocks and treatments. It does not simulate in-use conditions for finished products.

SI values are regarded as the official standard system of measurement for this standard test method.

Principle

A coverstock is placed over a standard absorbent medium which is then loaded with a specific quantity of simulated urine. A standard weight is placed onto the coverstock and absorbent medium to ensure even spreading of the liquid.

A pre-weighed pick up (blotter) paper is then placed on the coverstock and the weight is again placed on top. The mass of absorbed liquid by the pick up (blotter) paper is weighed and defined as wetback.

Samples

IPS uses Ahlstrom Grade 989 blotters for the absorbent pad and Ahlstrom Grade 632 for pick-up. IPS conditions and tests at 50% RH and 23°C.  IPS tests 5 specimens per sample.

 

Please note:
IPS cannot sell or otherwise provide standards, specifications, or test procedures to third parties.