B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/22
B29D 27/00 (1980.01)
Patent
CA 1053868
MICROPOROUS SHEETS AND A PROCESS FOR MAKING THEM Abstract of the Disclosure A method for making microporous sheets is provided wherein a dispersion of a cationic and/or anionic polyurethane is mixed with a solution containing a non-ionic polyurethane and the resulting mixture is coagulated with a non-solvent for the non-ionic polyurethane.
287924
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