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Glueing method for papermaking process

A neutral glue and pulp technology, applied in the field of rosin glue, can solve problems such as difficulty in neutral sizing, difficulty in stabilizing sizing effect, etc., and achieve the effects of eliminating interference, enhancing practical application value, and optimizing sizing reaction

Inactive Publication Date: 2006-10-25
上海埃格环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, under neutral papermaking conditions (PH in the range of 7.0 to 8.5), the Zeta-potential of pulp fibers and its wet end chemical behavior are very different from those under acidic conditions. As a result, in a medium-alkaline environment , even if rosin neutral sizing is used, the sizing effect is difficult to stabilize, coupled with the interference of impurities in waste paper pulp, it is very difficult to use rosin sizing to achieve neutral sizing in actual production

Method used

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  • Glueing method for papermaking process

Examples

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Effect test

Embodiment 1

[0047] Example 1: A quaternary system composed of rosin neutral glue, aluminum sulfate, polyethyleneimine and cationic polyacrylamide is used for the neutral sizing of the coated white board paper surface pulp of the whole wood pulp vermicelli, and the vermicelli quantitative is 28g / m. . Based on 1000kg dry pulp, the dosages are: rosin neutral glue 5kg: aluminum sulfate 10kg; polyethyleneimine 2kg: cationic polyacrylamide 0.3kg. Adding points are: rosin neutral gum is added at A; polyethyleneimine is added at D; aluminum sulfate is added at B; cationic polyacrylamide is added at F; neutral papermaking CaCO 3 The filler solution is added continuously at E (CaCO 3 The dosage is 10%, calculated by weight of solids on absolute dry pulp).

Embodiment 2

[0048] Example 2: A quaternary system composed of rosin neutral glue, aluminum sulfate, cationic polyquaternary amine and polyaminoamide is used for the surface pulp of coated white board paper for the mixed pulp liner of 30% wood pulp and 70% waste paper pulp Neutral sizing, based on 1000kg of dry pulp, the dosage is: rosin neutral size 10kg: aluminum sulfate 20kg: cationic polyquaternary amine 5kg: polyaminoamide 8kg. Adding points are: rosin neutral gum is added at B; aluminum sulfate is added at C; cationic polyquaternary ammonium is added at D; polyaminoamide is added at G; neutral papermaking CaCO is added 3 The filler solution is added continuously at E (CaCO3 The dosage is 10%, calculated by weight of solids on absolute dry pulp).

Embodiment 3

[0049] Example 3: A quaternary system composed of rosin neutral glue, aluminum sulfate, polyamide polyamine epichlorohydrin, and anionic polyacrylamide is used for neutral sizing of coated white board paper with 100% waste paper pulp liner , based on 1000kg dry pulp, the dosages are: rosin neutral glue 9kg; aluminum sulfate 36kg; polyamide polyamine epichlorohydrin 6kg and anionic polyacrylamide 7kg. Adding points are: rosin neutral gum is added at C; aluminum sulfate is added at B; polyamide polyamine epichlorohydrin is added at D; anionic polyacrylamide is added at F; neutral papermaking CaCO 3 The filler solution was added continuously at E(CaCO 3 The dosage is 8%, calculated by weight of solids on absolute dry pulp).

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Abstract

The invention relates to a glue-applying method during papermaking, applying glue to the paper pulp in the front-web pulp supply system of the papermaking wet part, completing glue application by a four-element glue applying system with rosin- containing neutral glue 3-30 kg, aluminum sulphate 1-40 kg, low-molecular weight polymer A with high charge density 0.1-10 kg and high-molecular weight polymer B 0.1-10 kg. And the method is strongly compatible with basic fillings in the practical production, and has good neutral glue applying effect, and can be widely applied to producing neutral paper and paperboards.

Description

technical field [0001] The invention relates to a sizing method used in the papermaking process, which is a method for using rosin glue in the papermaking process. Background technique [0002] In fact, most paper and cardboard need sizing. The common rosin sizing method is to use rosin glue and aluminum sulfate to form a binary system to complete the sizing. From 1804 to now, there is almost no change, and rosin sizing is often It can only be used for acid sizing in the acid papermaking process. [0003] However, due to the many advantages of neutral papermaking in reducing costs, improving quality, reducing energy consumption, reducing equipment corrosion, and reducing pollution loads, many papermaking companies are trying to shift from acidic papermaking to neutral papermaking, and neutral sizing is The key to sustainable papermaking. With the demand of the paper industry for neutral papermaking, a new type of rosin-based neutral glue has been successfully developed. Pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H23/18D21H17/25D21H17/32D21H17/35D21H17/55D21H17/62D21H17/64D21H21/16
Inventor 朱勇强周小岚
Owner 上海埃格环保科技有限公司
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