Kraft paper production process

Abstract

The invention discloses a manufacture process of brown paper. According to the manufacture process, logs are taken as raw material, and body paper is obtained by digesting, blanching, screening, beating, sizing, deslagging, forming on a net, squeezing, drying, rolling and calendering. Beating of the logs is performed by respectively beating and mixing oak, birch, cedar, camphor tree, masson pine, sago cycas and bagasse in an absolute dry weight ratio of (20-40):(10-20):(20-40):(10-20):(40-60):(10-20):25 to obtain a mixed pulp. According to the invention, the types, ratio and beating degree of fibers of pulp of the body paper can be regulated, the surface of the body paper is coated with a film, and the fiber strength can be enhanced by changing technological parameters in each step, thereby obtaining better bursting resistance, water proofness and printing performance.

Description

technical field

[0001] The invention relates to the field of pulp and paper making. More specifically, the present invention relates to a production process of kraft paper. Background technique

[0002] High-quality kraft paper is an updated product of ordinary kraft paper, which is widely used in film-coated packaging, medical packaging, file bags, envelopes, melon seeds bags, hand bags and other fields. The high-quality kraft paper produced from slightly bleached kraft wood pulp is a very popular raw material for the packaging industry because of its lighter color, better smoothness and strength, and can meet the packaging and printing requirements of packaging materials. It has replaced ordinary natural color kraft paper within a certain range, and the market demand is growing rapidly. For this reason, we have successfully developed this product in recent years, and the product quality has reached the domestic leading level, meeting the needs of the market. However, th...

Examples

Embodiment 1

[0023] A production process of kraft paper, comprising: using logs as raw materials, cooking, bleaching, screening, beating, sizing, slag removal, forming on the net, pressing, drying, coiling and calendering to obtain base paper, the beating of the logs The mixed pulp obtained is obtained by mixing oak, birch, fir, camphor, masson pine, iron tree and bagasse with a dry mass ratio of 20:10:20:10:40:10:25 after beating respectively. The beating concentration of oak is 3%, the beating degree is 28°SR, and the wet weight is 12g, the beating concentration of birch is 3%, the beating degree is 30°SR, and the wet weight is 14g, the beating concentration of cedar is 3%, beating The beating concentration of camphor tree is 3%, the beating degree is 32°SR, and the wet weight is 15g, the beating concentration of masson pine is 3%, the beating degree is 29°SR, and the wet weight The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14g, and the ...

Embodiment 2

[0034]A production process of kraft paper, comprising: using logs as raw materials, cooking, bleaching, screening, beating, sizing, slag removal, forming on the net, pressing, drying, coiling and calendering to obtain base paper, the beating of the logs The mixed pulp obtained is obtained by mixing oak, birch, fir, camphor, masson pine, iron tree and bagasse with a dry mass ratio of 40:20:40:20:60:20:25 after beating respectively. The beating concentration of oak is 3%, the beating degree is 28°SR, and the wet weight is 12g, the beating concentration of birch is 3%, the beating degree is 30°SR, and the wet weight is 14g, the beating concentration of cedar is 3%, beating The beating concentration of camphor tree is 3%, the beating degree is 32°SR, and the wet weight is 15g, the beating concentration of masson pine is 3%, the beating degree is 29°SR, and the wet weight The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14g, and the b...

Embodiment 3

[0045] A production process of kraft paper, comprising: using logs as raw materials, cooking, bleaching, screening, beating, sizing, slag removal, forming on the net, pressing, drying, coiling and calendering to obtain base paper, the beating of the logs The mixed pulp obtained is obtained by mixing oak, birch, fir, camphor, masson pine, iron tree and bagasse with a dry mass ratio of 30:15:30:15:50:15:25 after beating respectively. The beating concentration of oak is 3%, the beating degree is 28°SR, and the wet weight is 12g, the beating concentration of birch is 3%, the beating degree is 30°SR, and the wet weight is 14g, the beating concentration of cedar is 3%, beating The beating concentration of camphor tree is 3%, the beating degree is 32°SR, and the wet weight is 15g, the beating concentration of masson pine is 3%, the beating degree is 29°SR, and the wet weight The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14g, and the ...

technical field

[0001] The invention relates to the field of pulp and paper making. More specifically, the present invention relates to a production process of kraft paper. Background technique

[0002] High-quality kraft paper is an updated product of ordinary kraft paper, which is widely used in film-coated packaging, medical packaging, file bags, envelopes, melon seeds bags, hand bags and other fields. The high-quality kraft paper produced from slightly bleached kraft wood pulp is a very popular raw material for the packaging industry because of its lighter color, better smoothness and strength, and can meet the packaging and printing requirements of packaging materials. It has replaced ordinary natural color kraft paper within a certain range, and the market demand is growing rapidly. For this reason, we have successfully developed this product in recent years, and the product quality has reached the domestic leading level, meeting the needs of the market. However, th...

Examples

Embodiment 1

[0023] A production process of kraft paper, comprising: using logs as raw materials, cooking, bleaching, screening, beating, sizing, slag removal, forming on the net, pressing, drying, coiling and calendering to obtain base paper, the beating of the logs The mixed pulp obtained is obtained by mixing oak, birch, fir, camphor, masson pine, iron tree and bagasse with a dry mass ratio of 20:10:20:10:40:10:25 after beating respectively. The beating concentration of oak is 3%, the beating degree is 28°SR, and the wet weight is 12g, the beating concentration of birch is 3%, the beating degree is 30°SR, and the wet weight is 14g, the beating concentration of cedar is 3%, beating The beating concentration of camphor tree is 3%, the beating degree is 32°SR, and the wet weight is 15g, the beating concentration of masson pine is 3%, the beating degree is 29°SR, and the wet weight The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14g, and the ...

Embodiment 2

[0034]A production process of kraft paper, comprising: using logs as raw materials, cooking, bleaching, screening, beating, sizing, slag removal, forming on the net, pressing, drying, coiling and calendering to obtain base paper, the beating of the logs The mixed pulp obtained is obtained by mixing oak, birch, fir, camphor, masson pine, iron tree and bagasse with a dry mass ratio of 40:20:40:20:60:20:25 after beating respectively. The beating concentration of oak is 3%, the beating degree is 28°SR, and the wet weight is 12g, the beating concentration of birch is 3%, the beating degree is 30°SR, and the wet weight is 14g, the beating concentration of cedar is 3%, beating The beating concentration of camphor tree is 3%, the beating degree is 32°SR, and the wet weight is 15g, the beating concentration of masson pine is 3%, the beating degree is 29°SR, and the wet weight The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14g, and the b...

Embodiment 3

[0045] A production process of kraft paper, comprising: using logs as raw materials, cooking, bleaching, screening, beating, sizing, slag removal, forming on the net, pressing, drying, coiling and calendering to obtain base paper, the beating of the logs The mixed pulp obtained is obtained by mixing oak, birch, fir, camphor, masson pine, iron tree and bagasse with a dry mass ratio of 30:15:30:15:50:15:25 after beating respectively. The beating concentration of oak is 3%, the beating degree is 28°SR, and the wet weight is 12g, the beating concentration of birch is 3%, the beating degree is 30°SR, and the wet weight is 14g, the beating concentration of cedar is 3%, beating The beating concentration of camphor tree is 3%, the beating degree is 32°SR, and the wet weight is 15g, the beating concentration of masson pine is 3%, the beating degree is 29°SR, and the wet weight The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14g, and the ...