Preparation method of high-breakage-resistance kraft paper

The invention discloses a preparation method of high-breakage-resistance kraft paper, which comprises the following steps: fiber raw materials are subjected to mixing and disintegrating, desanding, high-concentration pulping, low-concentration pulping, net forming, squeezing and drying, wherein the concentration of the high-concentration pulping is 30-35%, the concentration of the low-concentration pulping is 4.8-6%, and the concentration of net forming is 0.15-0.25%. The kraft paper with good water absorption, high longitudinal tear index, high burst index and high tensile index can be prepared through the preparation method, indexes of the kraft paper are far away from those of common kraft paper in supermarkets, and the preparation method is suitable for papermaking of the kraft paper with low gram weight of 40g/m < 2 >-140g/m < 2 > and is simple in preparation process. 本发明公开了一种高耐破牛皮纸的制备方法，包括如下步骤：将纤维原料进行混合碎解、除砂、高浓打浆、低浓打浆、上网成形、压榨、干燥，其中高浓打浆的浓度为30％-35％，低浓打浆的浓度为4.8％-6％，上网成形的浓度为0.15％-0.25％。通过本申请的高耐破牛皮纸的制备方法能够制得