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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.
Corrugated board. Corrugated fiberboard, corrugated cardboard, or corrugated is a type of packaging material consisting of a fluted corrugated sheet and one or two flat linerboards. [1] It is made on "flute lamination machines" or "corrugators" and is used for making corrugated boxes. The corrugated medium sheet and the linerboard (s) are made ...
Paperboard is a thick paper -based material. While there is no rigid differentiation between paper and paperboard, paperboard is generally thicker (usually over 0.30 mm, 0.012 in, or 12 points) than paper and has certain superior attributes such as foldability and rigidity. According to ISO standards, paperboard is a paper with a grammage above ...
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.
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 .
It is defined as a Grade D building paper—a designation derived from a federal specification in the United States. [citation needed] Sometimes anachronistically referred to as "building paper", tar paper is manufactured from virgin kraft paper (as opposed to the fabric-based or synthetic mesh substrates of roofing felt) impregnated with ...
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