How Different Carryover Pitch Extractive Components are Affecting Kraft Paper Strength.

ABSTRACT: We present how harmful different wood extractives carried over to paper mill with unbleached softwood Kraft pulp are for the strength of packaging papers and boards. The investigations were done by simulating industrial papermaking conditions in laboratory-scale trials for handsheet production. It was found that fatty acids are the most relevant compounds in the carryover pitch extractives (CPEs), as they readily interfere in fiber-fiber bonding strength, control the properties of CPE micelles, and are furthermore the most abundant compounds. Addition of cationic starch improved strength and evened out the strength differences of handsheets with different CPE compounds. Oleic acid (unsaturated fatty acid) was an exception, as it was above average harmful for paper strength without cationic

SUBMITTER: Lahti J 

PROVIDER: S-EPMC8581972 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature