Patent ID: 7951267

Claim:
A method for making paper comprising: a) preparing a pulp from a material comprising recycled paper; b) treating the pulp with a lipolytic enzyme, which is able to hydrolyze a polymer comprising vinyl acetate monomer; and c) making paper from the treated pulp; wherein the enzyme has a) a degree of hydrolysis by Capillary Electrophoresis of at least 0.1 after 18 hours at 45° C. on a dispersed PVAc substrate, wherein the dispersed PVAc substrate is prepared by injecting 1.5 ml of 6% PVAc in methanol into 40 ml buffer pH 6 or 8, and wherein the molecular weight of the PVAc is about 12800; and/or b) a hydrolytic activity at 35° C. for 4 min with a 5% (w/v) polymer preparation comprising vinyl acetate as substrate in an emulsion consisting of 50 mM NaCl, 0.5 mM KH 2 PO 4 , 9% (v/v) Glycerol and 0.1% (w/v) Gum Arabicum, wherein the polymer is: (i) a PVAc homopolymer preparation and the reaction pH is 8; (ii) a vinyl acetate ethylene copolymer preparation, and the reaction pH is 7; and/or (iii) a vinyl acetate tert-decanoic acid, ethenyl ester copolymer preparation, and the reaction pH is 7.