ML kraft paperboard and preparation process thereof

Abstract

The invention discloses an ML kraft paperboard and a preparation process thereof, and mainly relates to the technical field of papermaking. According to the ML kraft paperboard, basis weight is 170, 200g / m<2>, the banner quantitative difference is less than or equal to 3%, tightness is greater than or equal to 0.75 g / cm<3>, smoothness is greater than or equal to 5s, a lateral ring pressure index is greater than or equal to 7.3N.m / g, interlayer bonding strength is greater than or equal to 130J / m<2>, a bursting index is greater than or equal to 1.8kpa. M<2> / g, transverse folding strength is greater than or equal to 4 times and paper moisture is 8+ / -2%. The preparation process of the ML kraft paperboard comprise the steps that preparation, pulping, mixing, paper forming and rewinding are carried out to obtain the paperboard, and then packaging is carried out; and pulp is ground during pulping, spray starch and fillers are added during paper making, and a dyeing agent is added for dyeing.The ML kraft paperboard has the advantages of low cost, high interlayer bonding, high water resistance, high smoothness and clean front appearance. The ML kraft paperboard is mainly used in a surfacelayer and an inner layer of an industrial paper tube, the ''angle-rising'' problem does not occur when the paper tube is cut in sections due to low basis weight; and the problems of surface blisteringand paper tube layering are solved due to the fact that the interlayer bonding strength of the ML kraft paperboard is higher than that of a general kraft paperboard and cardboard paper.

Description

technical field [0001] The invention mainly relates to the technical field of papermaking, in particular to ML kraft cardboard and a preparation process thereof. Background technique [0002] At present, domestic kraft linerboard (containerboard) is mainly used for the surface of cartons. However, with the continuous growth of the demand for the paper tube industry and the rapid development of the industry, customers' requirements for paper tubes are not only focused on quality, but also on product quality. There are also certain requirements for the appearance, and there are also some problems. The original paper tubes focus on product quality and despise the aesthetics of the appearance. For this, some manufacturers began to try to use kraft cardboard as the best paper tube. The outer packaging can improve the aesthetics of the paper tube, but most of the kraft paperboards on the market do not control the bonding strength between layers. During the tube rolling process, bl...

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Problems solved by technology

[0002] At present, domestic kraft linerboard (containerboard) is mainly used for the surface of cartons. However, with the continuous growth of the demand for the paper tube industry and the rapid development of the industry, customers' requirements for paper tubes are not only focused on quality, but also on product quality. There are also certain requirements for the appearance, and there are also some problems. The original paper tubes focus on product quality and despise the aesthetics of the appearance. For this, some manufacturers began to try to use kraft cardboard as the best paper tube. The outer packaging can improve the aesthetics of the paper tube, but most of the kraft paperboards on the market do not control the bonding strength between layers. During the tube rolling process, blistering and delamination are prone to occur. Aiming at this phenomenon, our company has developed Yes, a low weight paper used for the outer layer of the paper tube, the paper has high smoothness, uniform and beautiful color, high water resistance and interlayer strength index, which better solves this situation

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