Kraft card production process

Abstract

The invention discloses a production technology for a kraft liner board. The production technology includes the steps that log is used as a raw material, base paper is obtained through cooking, bleaching, screening, beating, sizing, residue removing, forming on forming fabric, squeezing, drying, rolling and calendaring, and according to log beating, oak, moso bamboo, dendrocalamus giganteus, fir, deodar, sago cycas and bagasse by the absolute dry mass ratio of (20-40):(10-20):(10-20):(20-40):(30-50):(10-20):15 are beaten and mixed to obtain mixed pulp. The kind, the ratio and the beating degree of pulp fibers of the base paper can be adjusted, the surface of the base paper is sequentially coated with a glue layer and a coating layer, and technological parameters of all steps are changed to improve the fiber strength and obtain higher pop strength, waterproofness 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 card. Background technique

[0002] Kraft card is a kind of cardboard used to make stronger cartons. It is called cardboard paper in our country. It can replace wooden crates to package goods. Its volume and weight are smaller and lighter than wooden boxes. It is one of the main paper types of packaging paper in my country. Kraft card has a tough texture, high burst resistance, ring compression strength and tear resistance, and also has high water resistance. Imports account for about 10% of packaging paper. Domestic containerboard is generally divided into four grades: U, A, B, and C. U-level is equivalent to the international advanced level, A-level is the international general level, and B-level is the domestic general level. Kraft paperboard is mainly used in the packaging of knitted cotton fabrics, dail...

Examples

Embodiment 1

[0022] A production process of a kraft card, comprising: using logs as raw materials, and obtaining base paper through cooking, bleaching, screening, beating, sizing, slag removal, online molding, pressing, drying, coiling and calendering. The beating is made by mixing oak, moso bamboo, dragon bamboo, cedar, cedar, iron tree and bagasse with a dry mass ratio of 20:10:10:20:30:10:15, respectively, and then mixing them to obtain a mixed pulp. The beating concentration of bamboo is 3%, the degree of beating is 28°SR, and the wet weight is 12g, the beating concentration of Moso bamboo is 3%, the degree of beating is 30°SR, and the wet weight is 14g, the beating concentration of dragon bamboo is 3%, the degree of beating is 32°SR, 15g wet weight, 3% cedar beating concentration, 29°SR beating degree, 12g wet weight, 3% cedar beating concentration, 29°SR beating degree, 13g wet weight, The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14...

Embodiment 2

[0032] A production process of a kraft card, comprising: using logs as raw materials, and obtaining base paper through cooking, bleaching, screening, beating, sizing, slag removal, online molding, pressing, drying, coiling and calendering. The beating is made by mixing oak, moso bamboo, dragon bamboo, cedar, cedar, iron tree and bagasse with a dry mass ratio of 40:20:20:40:50:20:15, respectively, and then mixing them to obtain a mixed pulp. The beating concentration of bamboo is 3%, the degree of beating is 28°SR, and the wet weight is 12g, the beating concentration of Moso bamboo is 3%, the degree of beating is 30°SR, and the wet weight is 14g, the beating concentration of dragon bamboo is 3%, the degree of beating is 32°SR, 15g wet weight, 3% cedar beating concentration, 29°SR beating degree, 12g wet weight, 3% cedar beating concentration, 29°SR beating degree, 13g wet weight, The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14...

Embodiment 3

[0042] A production process of a kraft card, comprising: using logs as raw materials, and obtaining base paper through cooking, bleaching, screening, beating, sizing, slag removal, online molding, pressing, drying, coiling and calendering. The beating is made by mixing oak, moso bamboo, dragon bamboo, cedar, cedar, cypress and bagasse with a dry mass ratio of 30:15:15:30:40:15:15, respectively, and then mixing them to obtain a mixed pulp. The beating concentration of bamboo is 3%, the degree of beating is 28°SR, and the wet weight is 12g, the beating concentration of Moso bamboo is 3%, the degree of beating is 30°SR, and the wet weight is 14g, the beating concentration of dragon bamboo is 3%, the degree of beating is 32°SR, 15g wet weight, 3% cedar beating concentration, 29°SR beating degree, 12g wet weight, 3% cedar beating concentration, 29°SR beating degree, 13g wet weight, The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14g,...

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 card. Background technique

[0002] Kraft card is a kind of cardboard used to make stronger cartons. It is called cardboard paper in our country. It can replace wooden crates to package goods. Its volume and weight are smaller and lighter than wooden boxes. It is one of the main paper types of packaging paper in my country. Kraft card has a tough texture, high burst resistance, ring compression strength and tear resistance, and also has high water resistance. Imports account for about 10% of packaging paper. Domestic containerboard is generally divided into four grades: U, A, B, and C. U-level is equivalent to the international advanced level, A-level is the international general level, and B-level is the domestic general level. Kraft paperboard is mainly used in the packaging of knitted cotton fabrics, dail...

Examples

Embodiment 1

[0022] A production process of a kraft card, comprising: using logs as raw materials, and obtaining base paper through cooking, bleaching, screening, beating, sizing, slag removal, online molding, pressing, drying, coiling and calendering. The beating is made by mixing oak, moso bamboo, dragon bamboo, cedar, cedar, iron tree and bagasse with a dry mass ratio of 20:10:10:20:30:10:15, respectively, and then mixing them to obtain a mixed pulp. The beating concentration of bamboo is 3%, the degree of beating is 28°SR, and the wet weight is 12g, the beating concentration of Moso bamboo is 3%, the degree of beating is 30°SR, and the wet weight is 14g, the beating concentration of dragon bamboo is 3%, the degree of beating is 32°SR, 15g wet weight, 3% cedar beating concentration, 29°SR beating degree, 12g wet weight, 3% cedar beating concentration, 29°SR beating degree, 13g wet weight, The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14...

Embodiment 2

[0032] A production process of a kraft card, comprising: using logs as raw materials, and obtaining base paper through cooking, bleaching, screening, beating, sizing, slag removal, online molding, pressing, drying, coiling and calendering. The beating is made by mixing oak, moso bamboo, dragon bamboo, cedar, cedar, iron tree and bagasse with a dry mass ratio of 40:20:20:40:50:20:15, respectively, and then mixing them to obtain a mixed pulp. The beating concentration of bamboo is 3%, the degree of beating is 28°SR, and the wet weight is 12g, the beating concentration of Moso bamboo is 3%, the degree of beating is 30°SR, and the wet weight is 14g, the beating concentration of dragon bamboo is 3%, the degree of beating is 32°SR, 15g wet weight, 3% cedar beating concentration, 29°SR beating degree, 12g wet weight, 3% cedar beating concentration, 29°SR beating degree, 13g wet weight, The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14...

Embodiment 3

[0042] A production process of a kraft card, comprising: using logs as raw materials, and obtaining base paper through cooking, bleaching, screening, beating, sizing, slag removal, online molding, pressing, drying, coiling and calendering. The beating is made by mixing oak, moso bamboo, dragon bamboo, cedar, cedar, cypress and bagasse with a dry mass ratio of 30:15:15:30:40:15:15, respectively, and then mixing them to obtain a mixed pulp. The beating concentration of bamboo is 3%, the degree of beating is 28°SR, and the wet weight is 12g, the beating concentration of Moso bamboo is 3%, the degree of beating is 30°SR, and the wet weight is 14g, the beating concentration of dragon bamboo is 3%, the degree of beating is 32°SR, 15g wet weight, 3% cedar beating concentration, 29°SR beating degree, 12g wet weight, 3% cedar beating concentration, 29°SR beating degree, 13g wet weight, The beating concentration of iron tree is 3%, the beating degree is 28°SR, and the wet weight is 14g,...