A kind of ml kraft cardboard and its preparation process

Abstract

The invention discloses a kind of ML kraft cardboard and its preparation process, which mainly relates to the technical field of papermaking. The basis weight of the paper is 170, 200g / m 2 , banner quantitative difference ≤ 3%, tightness ≥ 0.75g / cm 3 , smoothness ≥ 5s, transverse ring pressure index ≥ 7.3N.m / g, interlayer bonding strength ≥ 130J / m 2 , burst index ≥ 1.8kpa.m 2 / g, transverse folding strength ≥ 4 times, paper moisture is 8 ± 2%, the ML kraft cardboard manufacturing process includes preparation, pulping, mixing, paper forming, rewinding, and then packaging. Refining is carried out during pulping, spraying starch and filler are added when forming paper, and dyeing agent is added for dyeing. The invention has the advantages of low cost, high interlayer bonding, high water resistance, high smoothness, and clean front appearance. Mainly used in the surface layer and inner layer of industrial paper tubes, because of the low basis weight, there will be no "corner" problem when the paper tubes are cut in sections, because the bonding strength between layers is higher than that of ordinary kraft cardboard and cardboard High, solves the problems of surface foaming and paper tube delamination.

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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