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This pulp grade is very diverse. All NBSK pulps have long fibers and is often used as reinforcement pulp. [1] NBSK from British Columbia is mainly from Lodgepole Pine, with a significant amount of White Spruce. Redcedar, douglas fir, hemlock, and larch make up a smaller portion of the chip furnish. NBSK is known for having longer fiber lengths ...
Crofton Mill is a pulp mill and paper mill located in the Vancouver Island town of Crofton, British Columbia. The mill has 3 paper machines (only 2 are operational) and 2 pulp machines, which produce 349,000 tonnes of newsprint and directory paper , and 355,000 tonnes of northern bleached softwood kraft .
Canfor also owns a controlling share in Canfor Pulp Limited, which produces northern softwood kraft pulp and kraft paper in BC. [ 4 ] As of 2016, the company has an annual production capability of 5.9 billion board feet of lumber, 1.1 million tonnes of northern softwood market kraft pulp, approximately 220,000 tonnes of BCTMP and 140,000 tonnes ...
U.S. patent 296,935 was issued in 1884, and a pulp mill using this technology began in Sweden in 1890. [6] The invention of the recovery boiler by G. H. Tomlinson in the early 1930s was a milestone in the advancement of the kraft process. [ 7 ]
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Southern bleached softwood kraft (SBSK) is a wood pulp mainly produced in the southern USA. The main raw materials are slash pine , longleaf pine , shortleaf pine , loblolly pine and virginia pine .
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Dissolving pulp is mainly produced chemically from pulpwood in a process that has a low yield (30 - 35% of the wood). This makes up of about 85 - 88% of the production. [2] Dissolving pulp is made from the sulfite process or the kraft process with an acid prehydrolysis step to remove hemicelluloses. For the highest quality, it should be derived ...