초록 ▼

A method of reducing the number or amount of chemical additives normally incorporated into paper pulp furnish before transferring the latter to the continuous wire mesh of a papermaking machine in the manufacture of paper sheet involves the use of a hydrolyzed proteinaceous foam which does not appre

A method of reducing the number or amount of chemical additives normally incorporated into paper pulp furnish before transferring the latter to the continuous wire mesh of a papermaking machine in the manufacture of paper sheet involves the use of a hydrolyzed proteinaceous foam which does not appreciably affect the degree of sizing of the finished paper sheet. The use of such foam in paper manufacture can render unnecessary the chemical treatment of effluent from the papermaking machine which is normally required to avoid environmental pollution.

대표청구항 ▼

A method for reducing the curl of a sized paper sheet having a coating on one side and without substantially lowering the degree of sizing thereof, which comprises applying to the other side of the paper web during the manufacture of the coated and sized paper sheet on a paper making machine, a prot

A method for reducing the curl of a sized paper sheet having a coating on one side and without substantially lowering the degree of sizing thereof, which comprises applying to the other side of the paper web during the manufacture of the coated and sized paper sheet on a paper making machine, a proteinaceous foam forming composition containing a hydrolyzed protein foaming agent capable of reducing the surface tension of water from a normal value of 72 dynes per centimeter to a minimum value in the range of from 45 to 65 dynes per centimeter.