Kraft paper is a kind of tough and water-resistant packaging paper, brownish yellow and very versatile, which commonly used in the production of paper bags, envelopes, operating books, record sets, files and sandpaper. The quantitative range is from 80 g/m2 to 120 g/m2, with the difference between single-sided light, double-sided light, and stripes in web and flat paper. The main quality requirements are flexible and strong, high burst resistance, which can withstand greater tension and pressure does not break. Kraft paper has high pulling force, such as single light, double light, stripes, and no grain. Mainly used for packaging paper, envelopes, paper bags, etc.