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Preparation method of high-strength water-resistant recycled paperboard for carton packaging

A high-strength technology for packaging, applied in wrapping paper, wrapping paper, packaging, etc., can solve the problems of affecting mechanical strength and service life, poor water resistance of recycled cartons, and reduced fiber strength, etc., to achieve long service life, Good mechanical strength, effect of improving water resistance and mechanical strength

Inactive Publication Date: 2020-04-28
MACROSCOPIC CENTURY TIANJIN CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of light, bacteria, mildew, etc. during the use of waste paper, the fiber strength is damaged and reduced, and it is easy to break, which affects the mechanical strength and service life of recycled paper products used as raw materials; moreover, the water resistance of recycled cartons is relatively low. Poor, resulting in limited scope of use in packaging and other fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] A method for preparing high-strength water-resistant recycled cardboard for carton packaging, comprising the following steps:

[0019] 1) First add 30 parts by weight of starch, 3 parts by weight of sodium hydroxide, 4 parts by weight of hydrogen peroxide and 110 parts by weight of water into a container at 90°C for 4 hours, then add 5 parts by weight of styrene, 6 parts by weight of butyl acrylate and 0.5 parts by weight Parts by weight of ammonium persulfate were reacted at 80°C for 6 hours, and modified oxidized starch was obtained after cooling for subsequent use;

[0020] (2) Mix 60 parts by weight of regenerated pulp and 50 parts by weight of plant fiber pulp in a beater, then add 7 parts by weight of filler, 6 parts by weight of the modified oxidized pulp obtained in step (1). Starch and 2 parts by weight of collagen are stirred evenly to obtain a slurry mixture;

[0021] (3) Mix 80 parts by weight of the slurry mixture in step (2) with 0.5 parts by weight of al...

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PUM

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Abstract

The invention discloses a preparation method of a high-strength water-resistant recycled paperboard for carton packaging, and belongs to the technical field of recycled paper. The method comprises thefollowing steps: firstly, adding 20-30 parts by weight of starch, 1-3 parts by weight of sodium hydroxide, 2-4 parts by weight of hydrogen peroxide and 90-110 parts by weight of water into a container together to react for 2-4 hours at 70-90 DEG C; then adding 3-5 parts by weight of styrene, 2-6 parts by weight of butyl acrylate and 0.3-0.5 part by weight of ammonium persulfate, reacting for 4-6hours at 70-80 DEG C, and cooling to obtain modified oxidized starch for later use. The recycled paperboard has good mechanical strength, flexibility and water resistance, is long in service lifetimeand good in durability, and is suitable for being used as a carton packaging material.

Description

technical field [0001] The invention relates to the technical field of recycled paper, in particular to a method for preparing high-strength water-resistant recycled cardboard for carton packaging. Background technique [0002] At present, my country's paper industry is developing in the direction of reducing pollution, saving energy and making full use of fiber resources. Recycled paper, as a kind of paper produced with waste paper as raw material through more than a dozen processes such as sorting, purification, beating, and papermaking, is conducive to protecting the environment and saving resources, and has great potential for market development. At present, most of the recycling technologies of waste paper are made of pulp and paper, and then processed into cartons with cardboard. Due to the influence of light, bacteria, mildew, etc. during the use of waste paper, the strength of the fiber is damaged, and it is easy to break, which affects the mechanical strength and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/34D21H17/22D21H17/28D21H17/37D21H17/66D21H21/14D21H21/16D21H27/10D21F11/00
CPCD21H17/34D21H17/22D21H17/28D21H17/37D21H17/66D21H21/14D21H21/16D21H27/10D21F11/00
Inventor 张伟华
Owner MACROSCOPIC CENTURY TIANJIN CO LTD
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