Process for the stabilization of the properties of cellulosic membranes
AssigneeAkzo Nobel N.V.
InventorsHans-Gunther Breidohr, Michael Pelger, Panajotis Argyriadis
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Abstract
Properties of cellulosic membranes such as the length and the ultrafiltration rate are stabilized by warmth/humidity conditioning, whereby temperatures in a range of about 30.degree. to 60.degree. C. and relative humidities in a range of about 10 to 60% are suitable. The membranes may be enveloped at a relative humidity of about 40 to 60% and at about 20.degree. to 25.degree. C. in a packaging which is at least substantially impermeable to the passage of moisture before being subjected to the conditioning.
Claims8
Process for the stabilization of the properties of cellulosic membranes comprising
- conditioning the cellulosic membranes at a temperature between about 30.degree. C. and 60.degree. C. and at a relative humidity between about 10% and 60%, wherein prior to the conditioning, the cellulosic membranes are enveloped at a relative humidity of about 40% to 60% and at a temperature of about 20.degree. C. to 25.degree. C. in packaging which is at least substantially impermeable to the passage of moisture.
Dependencies are inferred from the claim text.