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The kraft process involves treatment of wood chips with a hot mixture of water, sodium hydroxide (NaOH), and sodium sulfide (Na 2 S), known as white liquor, that breaks the bonds that link lignin, hemicellulose, and cellulose. The technology entails several steps, both mechanical and chemical. It is the dominant method for producing paper.
Kraft paper. A roll of kraft paper. Kraft paper or kraft[1] is paper or paperboard (cardboard) produced from chemical pulp produced in the kraft process. Sack kraft paper (or just sack paper) is a porous kraft paper with high elasticity and high tear resistance, designed for packaging products with high demands for strength and durability. [2]
Northern bleached softwood kraft. Northern bleached softwood kraft (NBSK) is the paper industry's benchmark grade of pulp. Market NBSK is produced mainly in Canada and the Nordic countries. Some NBSK is also produced in north-western United States and in Russia. NBSK futures are traded on the Chicago Mercantile Exchange.
One of the 17 original founding mills of International Paper c. 1908, built in 1888 as the Otis Falls Pulp & Paper Company in Chisholm, Maine. The company was incorporated January 31, 1898, upon the merger of 17 pulp and paper mills in the northeastern United States. Its founders and first two presidents were William Augustus Russell, who died ...
Georgia-Pacific LLC is an American pulp and paper company based in Atlanta, Georgia, [1] and is one of the world's largest manufacturers and distributors of tissue, pulp, paper, toilet and paper towel dispensers, packaging, building products and related chemicals, and other forest products—largely made from its own timber. [2][3] Since 2005 ...
The process is conducted in large pressure vessels called digesters. Sulfite pulping is carried out between pH 1.5 and 5. The pulp is in contact with the pulping chemicals for 4 to 14 hours and at temperatures ranging from 130 to 160 °C (266 to 320 °F), again depending on the chemicals used.
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