Preparation method of moisture-regaining-resistant anti-layering high-strength environment-friendly kraft liner cardboard paper

A high-strength technology of liner board paper, applied in the field of papermaking, can solve problems such as poor printing, no products, easy water absorption strength of the board paper, etc., and achieve the effect of reducing porosity, simple preparation method, and good hydrophobic function

Inactive Publication Date: 2020-11-24
JIANGSU LEE & MAN PAPER MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the existing cardboard paper on the market has strong physical strength, it can prevent damage to items during transportation. However, in the southern rainy season or in a humid environment, the cardboard paper is easy to absorb water and weaken its strength, which is not conducive to handling.
At the same time, during the printing process of the cardboard paper, due to the poor combination of the layers of the cardboard paper, under the action of a certain tension, the surface layer is separated from the core and the bottom layer, which has caused adverse consequences for printing.
[0004] Most of the domestic paper mills have researched to varying degrees on containerboard with moisture-proof, water-proof and delamination-proof properties, but there are still no related products in the market

Method used

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  • Preparation method of moisture-regaining-resistant anti-layering high-strength environment-friendly kraft liner cardboard paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing moisture-recovery and delamination-resistant high-strength environmentally friendly kraft liner liner paper, comprising the following steps:

[0029] (1) Beating: beat waste paper and then mix it with wood pulp at a weight ratio of 4:1, add cellulase to the mixed pulp under stirring conditions, and the amount added is 0.4% of the dry pulp weight of the pulp ;

[0030] (2) Classification: collect the pulp according to the long fiber pulp, medium fiber pulp and short fiber pulp, and mix the short fiber pulp, medium fiber pulp and long fiber pulp according to the ratio of 30:20:50 to obtain the surface layer pulp. Mix short fiber pulp, medium fiber pulp and long fiber pulp in a ratio of 10:40:50 to obtain the core layer pulp, and mix short fiber pulp, medium fiber pulp and long fiber pulp in a ratio of 20:30:50 to obtain the bottom layer Slurry; after adding retention aids to the surface layer slurry, core layer slurry and bottom layer slurry, proce...

Embodiment 2

[0038] A method for preparing moisture-recovery and delamination-resistant high-strength environmentally friendly kraft liner liner paper, comprising the following steps:

[0039] (1) Beating: beat the waste paper and then mix it with wood pulp at a weight ratio of 5:1, add cellulase to the mixed pulp under stirring conditions, and the amount added is 0.5% of the weight of the dry pulp of the pulp ;

[0040] (2) Classification: collect the pulp according to the long fiber pulp, medium fiber pulp and short fiber pulp, and mix the short fiber pulp, medium fiber pulp and long fiber pulp according to the ratio of 30:20:50 to obtain the surface layer pulp. Mix short fiber pulp, medium fiber pulp and long fiber pulp in a ratio of 10:40:50 to obtain the core layer pulp, and mix short fiber pulp, medium fiber pulp and long fiber pulp in a ratio of 20:30:50 to obtain the bottom layer Slurry; after adding retention aids to the surface layer slurry, core layer slurry and bottom layer sl...

Embodiment 3

[0048] A method for preparing moisture-recovery and delamination-resistant high-strength environmentally friendly kraft liner liner paper, comprising the following steps:

[0049] (1) Beating: beat waste paper and then mix it with wood pulp at a weight ratio of 4-5:1, add cellulase to the mixed pulp under stirring conditions, and the amount added is 1% of the dry pulp weight of the pulp 0.4-0.5%;

[0050] (2) Classification: collect the pulp according to the long fiber pulp, medium fiber pulp and short fiber pulp, and mix the short fiber pulp, medium fiber pulp and long fiber pulp according to the ratio of 30:20:50 to obtain the surface layer pulp. Mix short fiber pulp, medium fiber pulp and long fiber pulp in a ratio of 10:40:50 to obtain the core layer pulp, and mix short fiber pulp, medium fiber pulp and long fiber pulp in a ratio of 20:30:50 to obtain the bottom layer Slurry; after adding retention aids to the surface layer slurry, core layer slurry and bottom layer slurr...

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Abstract

The invention discloses a preparation method of moisture-regaining-resistant anti-layering high-strength environment-friendly kraft liner cardboard paper. The preparation method comprises the following steps of (1) pulping; (2) grading; (3) papermaking and forming; (4) squeezing and drying; and (5) sizing. The preparation method is simple, and the interlayer bonding force of the prepared finishedpaper reaches 450 KN / m; the water absorption degree of the finished paper reaches 40s / 50s on the front and back sides, and the complete penetration of the paper sheet is more than 180s; the energy consumption of the finished paper reaches 195 kgce / t and reaches the advanced value specified in GB 31825-2015 'pulping and papermaking unit product energy consumption limit'; and the physical index of the finished paper is higher than the quality requirement of GBT 13024-2016 'box board'.

Description

technical field [0001] The invention relates to a method for preparing a high-strength environment-friendly kraft liner board paper with moisture regain and delamination resistance, and belongs to the technical field of papermaking. Background technique [0002] As the packaging of most products, cartons are mainly made of cardboard paper, which is an environmentally friendly green packaging material that is green, environmentally friendly and recyclable. It is widely used in electronics, food and other industrial products. the outer packaging. [0003] Although the existing cardboard paper on the market has strong physical strength, it can prevent damage to items during transportation. However, in the southern rainy season or in a humid environment, the cardboard paper is easy to absorb water and weaken its strength, which is not conducive to handling. . At the same time, during the printing process of the cardboard paper, due to the poor combination of the layers of the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/34D21C5/00D21F1/00D21F3/02D21F5/02D21H17/28D21H17/46D21H17/53D21H17/55D21H23/50
CPCD21B1/345D21C5/005D21F1/00D21F3/02D21F5/02D21H17/28D21H17/46D21H17/53D21H17/55D21H23/50
Inventor 李文斌沈军
Owner JIANGSU LEE & MAN PAPER MFG
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