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Low-gram-weight high-strength corrugated core paper and preparation process thereof

A corrugated medium paper and preparation technology, which is applied in the field of papermaking, can solve the problems of high cost, lack of competitive advantage, failure to meet requirements, and occurrence of holes, etc., to save the flotation process, reduce the amount of glue used, and reduce power consumption. Effect

Inactive Publication Date: 2020-04-07
SHANDONG HUATAI PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the conventional quantitative in the market is 110~200g / m 2 , the weight is high, especially the high unit cost of the middle bonding layer lacks competitive advantages, and the strength of the lower weight does not meet the requirements, and problems such as holes and fractures will occur

Method used

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  • Low-gram-weight high-strength corrugated core paper and preparation process thereof
  • Low-gram-weight high-strength corrugated core paper and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The low grammage high-strength corrugated medium paper prepared in this embodiment, its raw materials are calculated by weight, including domestic waste containerboard: 80 parts, imported 8# waste paper (U.S. 8# waste paper) 20 parts;

[0033] The preparation process includes the following steps: crushing, high-concentration desanding, rough screening, low-concentration desanding, papermaking, etc., and the pulp slag discharged from the rough screening is returned to high-concentration desanding for reuse, among which:

[0034] After mixing the waste paper in proportion, add water to adjust it to a concentration of 15%, add sodium hydroxide solution (mass concentration of 27.5%) according to the amount of 5kg / ton of dry waste paper, and use a drum hydropulper to disintegrate and remove plastics Large pieces of impurities such as paper; add stickies to the crushed slurry to control enzyme treatment, the amount of sticky control enzyme added is 0.05kg / ton of paper; then th...

Embodiment 2

[0037] The low grammage and high-strength corrugated medium paper prepared in this embodiment, its raw materials are calculated by weight, including domestic waste containerboard: 70 parts, imported 8# waste paper (US 8# waste paper) 30 parts;

[0038] The preparation process includes the following steps: crushing, high-concentration desanding, rough screening, low-concentration desanding, papermaking, etc., and the pulp slag discharged from the rough screening is returned to high-concentration desanding for reuse, among which:

[0039] After mixing the waste paper in proportion, add water to adjust it to a concentration of 20%, add sodium hydroxide solution (mass concentration 27.5%) according to the amount of 10kg / ton of absolute dry waste paper, and use a drum hydropulper to disintegrate and remove plastics Paper and other large pieces of impurities; add stickies to the crushed slurry to control enzyme treatment, the amount of stickies to control enzymes is 0.08kg / ton of pap...

Embodiment 3

[0042] The low grammage and high-strength corrugated medium paper prepared in this embodiment, its raw materials are calculated by weight, including domestic waste containerboard: 75 parts, imported 8# waste paper (U.S. 8# waste paper) 25 parts;

[0043] The preparation process includes the following steps: crushing, high-concentration desanding, rough screening, low-concentration desanding, papermaking, etc., and the pulp slag discharged from the rough screening is returned to high-concentration desanding for reuse, among which:

[0044] After mixing the waste paper in proportion, add water to adjust to a concentration of 17.5%, add sodium hydroxide solution (mass concentration is 27.5%) according to the amount of 7.5kg / ton dry waste paper, and use a drum hydraulic pulper to disintegrate and remove Large pieces of impurities such as plastic paper; add stickies to the crushed slurry to control enzyme treatment, and the amount of stickies to control enzymes is 0.065kg / ton of paper...

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Abstract

The invention relates to the field of papermaking and particularly relates to low-gram-weight high-strength corrugated core paper and a preparation process thereof. The paper is prepared from domesticwaste cardboard paper and a part of native American waste paper 8#. According to the process, the pulping process is improved, pulp residues needing to be incinerated originally are recycled, the production cost is reduced, and the low-gram-weight and high-strength corrugated core paper is obtained.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a low-grammage high-strength corrugated medium paper and a preparation process thereof. Background technique [0002] Corrugated medium paper is the raw paper used to form the corrugated core of corrugated cardboard. It is mainly used as the corrugated core layer (middle layer) of corrugated cardboard and plays an important role in the shockproof performance of corrugated cardboard. It can also be used alone as packaging paper for fragile items. At present, the conventional quantitative in the market is 110~200g / m 2 , the grammage is high, especially the high unit cost of the middle bonding layer lacks competitive advantages, and the strength of the lower grammage does not meet the requirements, and problems such as holes and fractures will occur. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention uses the original new...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/32D21B1/34D21C5/00D21H21/20D21H27/40
CPCD21B1/32D21B1/345D21C5/005D21H21/20D21H27/40Y02W30/64
Inventor 王友成李建强许富奎谢士兵张锋李晓亮魏文光张安钵魏国华郭启程李国顺冯好伟马小清
Owner SHANDONG HUATAI PAPER
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