2015 is the 100 year anniversary of TAPPI and we are celebrating the successes of the industry, people and companies who have contributed. Our celebration will focus on the innovative discoveries and breakthroughs by academic and industrial research groups over the past 100 years.
April 24, 2014 March
The word “kraft” means “strong” in the language of its origin, and the kraft pulping process is so named because of the superior strength of the resulting paper. Carl F. Dahl invented the process in 1879, and patented it in 1884 and describes a technology for conversion of wood into wood pulp consisting of almost pure cellulose fibers. The kraft process entails treatment of wood chips in a pressurized vessel with a mixture of hot sodium hydroxide and sodium sulfide (called white liquor). As it “cooks”, the process attacks and eventually dissolves the phenolic material called lignin that glues the fi ... read more