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  2. Kraft paper - Wikipedia

    en.wikipedia.org/wiki/Kraft_paper

    Normal kraft paper is strong and relatively coarse. It has high tensile strength. The grammage is normally 40–135 g/m 2. 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.

  3. Paper bag - Wikipedia

    en.wikipedia.org/wiki/Paper_bag

    Kraft paper bags Bag of sugar Traditional paper bags made from reused newspaper in India. A paper bag is a bag made of paper, usually kraft paper. Paper bags can be made either with virgin or recycled fibres to meet customers' demands. Paper bags are commonly used as shopping carrier bags and for packaging of some consumer goods. They carry a ...

  4. Paper chemicals - Wikipedia

    en.wikipedia.org/wiki/Paper_chemicals

    Chemical pulping involves dissolving lignin in order to extract the cellulose from the wood fiber. The different processes of chemical pulping include the Kraft process, which uses caustic soda and sodium sulfide and is the most common; alternatively, the use of sulfurous acid is known as the sulfite process, the neutral sulfite semichemical is treated as a third process separate from sulfite ...

  5. Kraft process - Wikipedia

    en.wikipedia.org/wiki/Kraft_process

    The kraft process (also known as kraft pulping or sulfate process) is a process for conversion of wood into wood pulp, which consists of almost pure cellulose fibres, the main component of paper. 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 ...

  6. Sack paper - Wikipedia

    en.wikipedia.org/?title=Sack_paper&redirect=no

    From Wikipedia, the free encyclopedia. Redirect page

  7. Grammage - Wikipedia

    en.wikipedia.org/wiki/Grammage

    Newsprint was used as wrapping paper, and the first paper bags were made from newsprint. The newsprint ream standard also became the standard for packaging papers, even though in packaging papers kraft pulp, rather than ground wood, was used for greater strength. Paper weight is sometimes stated using the "#" symbol. For example, "20#" means ...

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