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Preparation technology of kraft liner box board

A technology for the production of liner liner paper and its preparation process, which is applied in the field of production process of kraft liner liner paper, which can solve the problems of high production cost, increased investment, high energy consumption, etc., so as to increase the retention rate and improve the paper production Strength, the effect of simple preparation method

Active Publication Date: 2019-04-16
JIANGSU LEE & MAN PAPER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach will inevitably increase investment, higher energy consumption, higher production costs, and cannot completely remove the sticky matter in the slurry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation technology of kraft liner linerboard, comprises the following steps:

[0023] (1) Pulping: Put the waste paper in a pulper for pulping. After classification, long-fiber pulp, medium-fiber pulp and short-fiber pulp are obtained. Mix long-fiber pulp, short-fiber pulp and fillers with a weight ratio of 9:1. As the bottom layer pulp, mix medium fiber pulp and short fiber pulp with a weight ratio of 4:1 as the core layer pulp, and mix short fiber pulp, medium fiber pulp and long fiber pulp with a weight ratio of 5:1:1 and dry strength agent mixed as surface layer slurry;

[0024] (2) Papermaking: The surface layer slurry, core layer slurry and bottom layer slurry are sprayed on the forming wire through a headbox in sequence and combined into one, and then dehydrated and dried by pressing to obtain base paper;

[0025] (3) Sizing: Spray and sizing the base paper to obtain the final finished linerboard.

[0026] The dry strength agent includes the follo...

Embodiment 2

[0030] A kind of preparation technology of kraft liner linerboard, comprises the following steps:

[0031] (1) Pulping: Put the waste paper in a pulper for pulping. After classification, long-fiber pulp, medium-fiber pulp and short-fiber pulp are obtained. Mix long-fiber pulp, short-fiber pulp and fillers with a weight ratio of 9:1. As the bottom layer pulp, mix medium fiber pulp and short fiber pulp with a weight ratio of 4:1 as the core layer pulp, and mix short fiber pulp, medium fiber pulp and long fiber pulp with a weight ratio of 5:1:1 and dry strength agent mixed as surface layer slurry;

[0032] (2) Papermaking: The surface layer slurry, core layer slurry and bottom layer slurry are sprayed on the forming wire through a headbox in sequence and combined into one, and then dehydrated and dried by pressing to obtain base paper;

[0033] (3) Sizing: Spray and sizing the base paper to obtain the final finished linerboard.

[0034] The dry strength agent includes the follo...

Embodiment 3

[0038] A kind of preparation technology of kraft liner linerboard, comprises the following steps:

[0039] (1) Pulping: Put the waste paper in a pulper for pulping. After classification, long-fiber pulp, medium-fiber pulp and short-fiber pulp are obtained. Mix long-fiber pulp, short-fiber pulp and fillers with a weight ratio of 9:1. As the bottom layer pulp, mix medium fiber pulp and short fiber pulp with a weight ratio of 4:1 as the core layer pulp, and mix short fiber pulp, medium fiber pulp and long fiber pulp with a weight ratio of 5:1:1 and dry strength agent mixed as surface layer slurry;

[0040] (2) Papermaking: The surface layer slurry, core layer slurry and bottom layer slurry are sprayed on the forming wire through a headbox in sequence and combined into one, and then dehydrated and dried by pressing to obtain base paper;

[0041] (3) Sizing: Spray and sizing the base paper to obtain the final finished linerboard.

[0042] The dry strength agent includes the follo...

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PUM

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Abstract

The invention discloses a preparation technology for a kraft liner box board. The technology comprises the following steps of 1 pulping, 2 papermaking and 3 sizing. By adopting graded bottom layer slurry, core layer slurry and surface layer slurry, waste paper slurry is sufficiently utilized, and meanwhile the strength and brightness of formed paper are ensured; a filler is added into the bottom layer slurry, the strength of the bottom layer slurry is ensured, and a dry strength agent is added into the surface layer slurry, so that the formed paper tenacity is improved.

Description

technical field [0001] The invention relates to a preparation process of kraft liner board paper, which belongs to the technical field of papermaking. Background technique [0002] At present, the pulping methods of domestic manufacturers of containerboard paper mostly use AOCC (American waste) + OCC (national waste), which are classified and screened after being pulverized by a pulper. Among them, the medium fiber is used for the surface layer, and the short fiber is used for For the core layer, long fibers are used for the bottom layer. However, due to the repeated recycling of waste paper, various performance indicators of fibers have declined, and there are more stickies in waste paper, which may easily cause paper machine breakage during papermaking, resulting in unqualified appearance of the finished paper, partial There are quality problems such as explosive wires, and the quality of domestic waste is worse than that of American waste. Therefore, in order to improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/32D21B1/34D21H17/24D21H17/32D21H17/35D21H17/66D21H17/67D21H17/68D21H21/18D21H27/30B32B29/00
CPCB32B29/00D21B1/32D21B1/345D21H17/24D21H17/32D21H17/35D21H17/66D21H17/67D21H17/675D21H17/68D21H21/18D21H27/30Y02W30/64
Inventor 李文斌
Owner JIANGSU LEE & MAN PAPER MFG
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