| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a packaging paper for heavy-duty bag that makes it possible to produce a heavy-duty bag which hardly slips even when the bags are piled up after packing of a powder product, even though an antislipping agent is not applied on the base paper surface in the papermaking or bag-making step of the base paper. <P>SOLUTION: In a packaging paper for heavy-duty bag, a pulp raw material is mainly composed of a unbleached pulp in which the kappa number after digestion of lignocellulosic material is 20-80. In the packaging paper for heavy-duty bag, 0.1-2.0 pts.mass of aluminium sulfate is added to 100 pts.mass of the pulp raw material to make paper, and colloidal silica with an average particle diameter of 100 nm or less is contained in the paper by 0.05-2.0 mass%, preferably 0.2-2.0 mass%, and the coefficient of static friction is in the range of 0.55-0.70. <P>COPYRIGHT: (C)2012,JPO&INPIT |
