Kraft paper valve bag, kraft paper, the analysis of the causes of strong than ordinary paper

Kraft paper, has the very high tension, there are presented. especially, double light, stripes, no lines, etc. Mainly used for wrapping paper, envelopes, paper bags, etc, and press roller bag lining, etc. Used as packaging materials, high intensity, yellowish-brown, usually half bleached or fully bleached kraft pulp was light brown, cream or white. Quantitative 80 ~ 120 g/m2, breaking length is in commonly 6000 m or more. Tensile strength, rupture work and dynamic strength is high. A roll of paper, and a tablet of paper. Is made of sulfate coniferous wood pulp as raw material, after beating, in the long nets manufacture paper with pulp and paper machine. Can be used as cement bag paper, envelope paper, glue sealing paper, tar paper, cable protection paper, insulating paper, etc. and plain paper manufacturing methods and there is not much different. Why strong kraft paper bagthan ordinary paper? This is mainly used in the system of kraft paper wood fiber is longer, and when cooking wood, is to use caustic soda and alcali sulphide chemicals handled, so that their chemical role, has a more moderate damage by the strength of the original wood fiber is relatively small, so with this kind of paper pulp making paper, between the fibre and fibre is tightly dependent, so kraft paper, all very fast. In a long time ago, & other; Kraft paper & throughout; When is really made of calf leather. This, of course, & other; Kraft paper & throughout; , now only when doing the drum skin, it will only be needed; And you package with kraft paper, is that people learn the papermaking technology, use of conifer wood fiber, pulp through chemical method, add the pulper in beating, add rubber, dyes, etc. , the last copy into paper in paper machine. Due to this kind of paper color is yellow-brown, paper is tenacious, much like leather, so people call it a kraft paper.
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