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Sizing process suitable for moisture-regaining-resistant kraft liner cardboard paper

A technology of liner board and kraft leather, applied in the field of papermaking, can solve the problems of paper webs not having moisture resistance, and achieve the effect of improving adhesiveness

Pending Publication Date: 2021-04-23
JIANGSU LEE & MAN PAPER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, after the current sizing agent is used, the paper web does not have good moisture resistance and needs to be further strengthened

Method used

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  • Sizing process suitable for moisture-regaining-resistant kraft liner cardboard paper
  • Sizing process suitable for moisture-regaining-resistant kraft liner cardboard paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The specific process is as figure 1 As shown, a sizing process suitable for moisture-resistant kraft liner linerboard includes the following steps:

[0027] (1) Corn starch pretreatment: After mixing corn starch, water and amylase for 60-90 minutes, heat up to 85-90°C, react for 20-30 minutes, then heat up to 130-140°C, and react for 5-10 minutes; Keep the temperature at 85-90°C to obtain a starch solution for later use;

[0028] (2) Sizing agent preparation: mix polyvinyl alcohol and water and put it in the reaction kettle, then add the starch solution in step (1) to the reaction kettle, then add titanium dioxide and chitosan, mix well and then add sulfuric acid Aluminum, placed together in the sizer;

[0029] (3) Sizing: After the paper web is dried at 60-80°C, sizing is performed on both sides;

[0030] (4) Post-sizing treatment: After sizing, dry again at a temperature of 60-80°C. After drying, calender and coil.

[0031] In the step (1), based on 10 parts by we...

Embodiment 2

[0035] The specific process is as figure 1 As shown, a sizing process suitable for moisture-resistant kraft liner linerboard includes the following steps:

[0036] (1) Corn starch pretreatment: After mixing corn starch, water and amylase for 60-90 minutes, heat up to 85-90°C, react for 20-30 minutes, then heat up to 130-140°C, and react for 5-10 minutes; Keep the temperature at 85-90°C to obtain a starch solution for later use;

[0037] (2) Sizing agent preparation: mix polyvinyl alcohol and water and put it in the reaction kettle, then add the starch solution in step (1) to the reaction kettle, then add titanium dioxide and chitosan, mix well and then add sulfuric acid Aluminum, placed together in the sizer;

[0038] (3) Sizing: After the paper web is dried at 60-80°C, sizing is performed on both sides;

[0039] (4) Post-sizing treatment: After sizing, dry again at a temperature of 60-80°C. After drying, calender and coil.

[0040] In the step (1), based on 10 parts by we...

Embodiment 3

[0044] The specific process is as figure 1 As shown, a sizing process suitable for moisture-resistant kraft liner linerboard includes the following steps:

[0045] (1) Corn starch pretreatment: After mixing corn starch, water and amylase for 60-90 minutes, heat up to 85-90°C, react for 20-30 minutes, then heat up to 130-140°C, and react for 5-10 minutes; Keep the temperature at 85-90°C to obtain a starch solution for later use;

[0046] (2) Sizing agent preparation: mix polyvinyl alcohol and water and put it in the reaction kettle, then add the starch solution in step (1) to the reaction kettle, then add titanium dioxide and chitosan, mix well and then add sulfuric acid Aluminum, placed together in the sizer;

[0047] (3) Sizing: After the paper web is dried at 60-80°C, sizing is performed on both sides;

[0048] (4) Post-sizing treatment: After sizing, dry again at a temperature of 60-80°C. After drying, calender and coil.

[0049] In the step (1), based on 10 parts by we...

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Abstract

The invention discloses a sizing process suitable for moisture-regaining-resistant kraft liner cardboard paper. The method comprises the steps of (1) pretreating corn starch; (2) preparing a sizing agent; (3) conducting sizing, specifically, drying the paper web and then sizing; and (4) carrying out sizing post-treatment. According to the sizing process, polyvinyl alcohol, titanium dioxide and corn starch are mixed to prepare the novel sizing agent, so that the sizing agent has a good hydrophobic function, and meanwhile, chitosan is added, so that the adhesiveness of the sizing agent is improved.

Description

technical field [0001] The invention relates to a sizing process suitable for moisture-resistant kraft liner liner paper, which belongs to the technical field of papermaking. Background technique [0002] Containerboard is mainly used in the packaging industry. Due to the shortage of pulp raw materials, most companies use waste cartons to produce containerboard. However, the paper produced by waste paper raw materials has low strength and poor quality. In order to meet the needs of users for paper strength and other properties, general paper companies use surface sizing to improve various performance indicators of paper and cardboard, including paper strength such as burst strength, ring crush strength, tensile strength, and folding endurance. Wait. [0003] Surface sizing is a method of sizing on both sides of paper or cardboard with an aqueous dispersion containing one or more surface sizing agents in specific equipment. Most surface sizing agents are composed of hydroph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H23/22D21H19/38D21H19/44D21H19/54D21H19/60D21H19/84D21H21/16
CPCD21H23/22D21H19/84D21H19/385D21H19/54D21H19/60D21H19/44D21H19/38D21H21/16
Inventor 李文斌
Owner JIANGSU LEE & MAN PAPER MFG
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