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Paper production process and its product

A production process, carboxymethyl hydroxypropyl technology, applied in papermaking, textiles and papermaking, synthetic cellulose/non-cellulose material pulp/paper, etc., can solve the problems of low paper strength, improve paper strength, improve Retention and drainage, promoting the effect of cellulose dispersion

Active Publication Date: 2012-03-14
KUNSHAN BANKNOTE PAPER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the retention and drainage properties of the CMC additive to pulp need to be further improved, and the strength of the produced paper is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] After the refining process step, first add titanium dioxide and preservatives to the stock tank, and then add CMHPC, control CMHPC to 0.01% of the mass ratio of CMHPC to the paper main material fiber, and add wet before sending to the wet part of the paper machine Strong agent melamine-formaldehyde resin, control the mass ratio of melamine-formaldehyde resin to the paper main material fiber to 0.5%, after uniform mixing, the slurry is transported to the paper machine for papermaking, and made into wet paper; Drying, and then surface sizing, the sizing material used is PVA; and then drying the preliminary paper after surface sizing to obtain the final paper.

Embodiment 2

[0021] After the fine pulping process step, through the pulping process step, kaolin and defoamer are added in the pulping process, after uniform mixing, the wet strength agent polyamide polyamine epichlorohydrin resin is first added to the wet part of the paper machine, and controlled Polyamide polyamine epichlorohydrin resin is 1.0% by mass ratio to paper-making main material fiber, then adds CMHPC, controls CMHPC to paper-forming main material fiber by its mass ratio is 0.5%, after mixing evenly , the slurry is transported to the paper machine for papermaking, and made into wet paper; the wet paper is dried, and then the surface is sized, and the sizing material used is AKD; and the preliminary paper after the surface sizing is dried again to obtain the final paper. into paper.

Embodiment 3

[0023] After the refining process step, after the pulping process step, calcium carbonate, anion scavenger and preservative are added in the pulping process, and CMHPC is added to the conveying pulp pipe before being sent to the wet end of the paper machine to control the impact of CMHPC on the paper. The main material fiber is 1.5% according to its mass ratio, then add wet strength agent polyamide epichlorohydrin resin, control polyamide epichlorohydrin resin to paper-making main material fiber according to its accounted mass ratio is 2.0%, evenly mix Finally, the slurry is transported to the paper machine for papermaking and made into wet paper; the wet paper is dried, and the dried preliminary paper is subjected to further surface sizing treatment, and then dried to make the final paper.

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Abstract

The invention discloses a paper production process and its product. The production process provided by the invention mainly comprises a refining step, a slurry forming step, a paper making step, a drying step, a glue applying step and a finishing processing step. Before paper making of a slurry, carboxymethyl hydroxypropyl cellulose (CMHPC) is added into the slurry, wherein carboxymethyl hydroxypropyl cellulose (CMHPC) accounts for 0.01-3.0wt% of the dry weight of paper pulp. A few CMHPC is added into finished paper obtained by the above technology. As CMHPC is an auxiliary agent and has properties similar to CMC, and hydroxypropyl group is introduced into the chemical auxiliary agent, CMHPC comprises carboxymethyl and hydroxypropyl. Nonionic polar group is introduced into a carboxymethyl cellulose molecular chain, thus maintaining original properties of CMC and simultaneously further promoting fiber dispersion to improve drainage and retention and raise paper strength.

Description

technical field [0001] The invention relates to a paper production process and its product, in particular to a production process and its product for improving the retention and drainage effect of a slurry system and the paper strength performance. Background technique [0002] The production of paper is a complicated process. Many characteristics such as improving the strength of paper, improving paper evenness, improving fiber retention, and improving pulp dehydration are often obtained by adding additives to pulp, but due to the addition of additives, often It will lead to conflicts with the actual production while achieving performance improvement. How to ensure multiple good characteristics while ensuring normal production and operation and improving production and operation efficiency is one of the keys to the success of the research on new papermaking additives. [0003] In the current papermaking process, adding CMC (carboxymethyl cellulose) to the slurry can improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/00
Inventor 王都义王坤陆春宇仲维武刘加
Owner KUNSHAN BANKNOTE PAPER
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