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The raw material is long fibered softwood fluff pulp in roll form. The pulp are defibrized in a hammermill. Defibration is the process of freeing the fibres from each other before entering the papermachine. Important parameters for dry defibration are shredding energy and knot content. Normally an air-laid paper consists of about 85% fibre.
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.
In North America, virgin (non-recycled) wood fibre is primarily extracted from hardwood (deciduous) trees and softwood (coniferous) trees. The wood fibre can be extracted as a primary product, or collected during the milling of lumber. [1] Wood fibres can also be recycled from used paper materials. [2]
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 .
Kraft pulp is darker than other wood pulps, but it can be bleached to make very white pulp. Fully bleached kraft pulp is used to make high-quality paper where strength, whiteness, and resistance to yellowing are important. The kraft process can use a wider range of fiber sources than most other pulping processes.
You can use those wrapping paper scraps (that you would otherwise throw out) to make a cute paper bow. What You'll Need: Wrapping paper scraps (double-sided works best!)
More than 90% of the fluff pulps are fully bleached chemical softwood pulps, of which more than 90% are kraft pulps. The most common raw material source for fluff pulps are southern bleached softwood kraft from loblolly pine. SBSK from other species and NBSK are also used to make fluff pulp. [4] Thicker fibres are preferred to improve the bulk.
His creations range from guitar stands priced at $179 to mid-century-style clocks starting at $300 and pieces of large marquetry — an art form involving inlaid work made from small pieces of ...