Southern bleached softwood kraft (SBSK) is a

wood pulp Pulp is a lignocellulosic fibrous material prepared by chemically or mechanically separating cellulose fibers from wood, fiber crops, waste paper, or rags. Mixed with water and other chemical or plant-based additives, pulp is the major raw mate ...

mainly produced in the southern USA. The main raw materials are

slash pine ''Pinus elliottii'', commonly known as slash pine,Family, P. P. (1990). Pinus elliottii Engelm. slash pine. ''Silvics of North America: Conifers'', (654), 338. is a conifer tree native to the Southeastern United States. Slash pine is named after ...

longleaf pine The longleaf pine (''Pinus palustris'') is a pine species native to the Southeastern United States, found along the coastal plain from East Texas to southern Virginia, extending into northern and central Florida. In this area it is also known as ...

shortleaf pine ''Pinus echinata'', the shortleaf pine, is a species of pine native to the southeastern United States. Description The tree is variable in form, sometimes straight, sometimes crooked, with an irregular crown. The tree reaches heights of with a ...

loblolly pine ''Pinus taeda'', commonly known as loblolly pine, is one of several pines native to the Southeastern United States, from East Texas to Florida, and north to southern New Jersey. The wood industry classifies the species as a southern yellow pine. ...

and

virginia pine ''Pinus virginiana'', the Virginia pine, scrub pine, Jersey pine, Possum pine, is a medium-sized tree, often found on poorer soils from Long Island in southern New York south through the Appalachian Mountains to western Tennessee and Alabama. T ...

Properties

SBSK is produced from mixed fibre sources, but the main wood species of the pulp is dominating the properties. All have long fibres. Slash pine and longleaf pine have thick walled fibres and makes the pulp suitable for fluff pulp.

Applications

SBSK is used in

fluff pulp Fluff pulp (also called comminution pulp or fluffy pulp) is a type of chemical pulp made from long fibre softwoods. Important parameters for fluff pulp are bulk and water absorbency. History Fluff pulp was first developed for use in disposable san ...

tissue paper Tissue paper or simply tissue is a lightweight paper or, light crêpe paper. Tissue can be made from recycled paper pulp on a paper machine. Tissue paper is very versatile, and different kinds of tissue are made to best serve these purposes, w ...

filter paper Filter paper is a semi-permeable paper barrier placed perpendicular to a liquid or air flow. It is used to separate fine solid particles from liquids or gases. The raw materials are different Pulp (paper), paper pulps. The pulp may be made from soft ...

and

mercerised pulp Mercerised pulp is a bleached pulp that is treated with hot diluted alkali to get extra high bulk and high porosity. The pulp feels and looks similar to a cotton ball. Manufacture Mercerising of pulp is a post treatment of fully bleached pulp nor ...

. It is used as reinforcement fibres when making

paper Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood, rags, grasses or other vegetable sources in water, draining the water through fine mesh leaving the fibre evenly distrib ...

or as raw material for

kraft paper Kraft paper or kraft 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 packag ...

References

Papermaking Pulp and paper industry {{Material-stub

Properties

Applications

See also

References