Papermaking modified calcium carbonate and method for preparing same

A technology of calcium carbonate and light calcium carbonate, which is applied in the field of calcium carbonate, can solve the problems of increasing wastewater treatment volume and treatment cost, weak binding force between calcium carbonate and fiber, and large decline in paper strength performance, so as to achieve good film-forming properties , Improve lubricity and gloss, strong alkali and salt resistance

Inactive Publication Date: 2017-12-01
广西华洋矿源材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the research on the improvement technology of calcium carbonate filler is becoming more and more extensive and in-depth, but the technology that can be used in base paper production is very limited. There are four main problems: first, the modification process of calcium carbonate filler is complicated and the cost is too high; The second is that the effect of calcium carbonate filler modification is not obvious. With the addition of fillers, the strength of paper decreases greatly; the third is that the stability of the modified fillers is not enough, and the binding force between calcium carbonate and fibers is weak, making the fillers in the paper. The retention rate is low, the loss is serious, and the utilization rate of raw materials is low, which also increases the amount of wastewater treatment and the cost of treatment

Method used

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  • Papermaking modified calcium carbonate and method for preparing same

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Embodiment 1

[0025] A modified calcium carbonate used in papermaking, mainly prepared from the following raw materials by weight: 100 parts by weight of light calcium carbonate, 10 parts of bamboo pulp fiber, 30 parts of cationic starch, 1 part of sodium stearate, and 0.01 part of sodium polyacrylate Parts, 1 part of bentonite, 0.1 part of chitosan, 0.01 part of trimethyl phosphate hardener, 0.2 part of antioxidant, 0.5 part of PEO dispersant and 0.5 part of silane coupling agent. Wherein, the antioxidant is prepared by mixing propyl gallate and metasulfite in a weight ratio of 1:2.

[0026] The embodiment of the present invention also provides a method for preparing modified calcium carbonate for papermaking, the method includes the following steps:

[0027] (1) Weigh the above raw materials in parts by weight and set aside;

[0028] (2) Add bamboo pulp fiber to water, heat for 15 minutes while stirring in a water bath at 50°C, then add sodium polyacrylate, bentonite and chitosan, and stir at 3...

Embodiment 2

[0034] A modified calcium carbonate used in papermaking, mainly prepared from the following raw materials by weight: 120 parts by weight of light calcium carbonate, 15 parts of bamboo pulp fiber, 40 parts of cationic starch, 3 parts of sodium stearate, and 0.05 parts of sodium polyacrylate Parts, 3 parts of bentonite, 0.8 parts of chitosan, 0.05 parts of trimethyl phosphate hardener, 0.8 parts of antioxidant, 1.5 parts of PEO dispersant and 1.5 parts of silane coupling agent. Wherein, the antioxidant is prepared by mixing propyl gallate and metasulfite in a weight ratio of 1:5.

[0035] The embodiment of the present invention also provides a method for preparing modified calcium carbonate for papermaking, the method includes the following steps:

[0036] (1) Weigh the above raw materials in parts by weight and set aside;

[0037] (2) Add bamboo pulp fiber to water, heat for 20 minutes while stirring in a 55°C water bath, then add sodium polyacrylate, bentonite and chitosan, and stir...

Embodiment 3

[0043] A modified calcium carbonate used for papermaking, mainly prepared from the following raw materials by weight: 105 parts by weight of light calcium carbonate, 11 parts of bamboo pulp fiber, 32 parts of cationic starch, 1.5 parts of sodium stearate, and 0.02 parts of sodium polyacrylate Parts, 1.5 parts of bentonite, 0.2 parts of chitosan, 0.02 parts of trimethyl phosphate hardener, 0.3 parts of antioxidant, 0.7 parts of PEO dispersant and 0.7 parts of silane coupling agent. Wherein, the antioxidant is prepared by mixing propyl gallate and metasulfite in a weight ratio of 1:3.

[0044] The embodiment of the present invention also provides a method for preparing modified calcium carbonate for papermaking, the method includes the following steps:

[0045] (1) Weigh the above raw materials in parts by weight and set aside;

[0046] (2) Add bamboo pulp fiber to water, heat for 16 min while stirring in a water bath at 51°C, then add sodium polyacrylate, bentonite and chitosan, and ...

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Abstract

The invention belongs to the technical field of calcium carbonate technologies, and discloses papermaking modified calcium carbonate. The papermaking modified calcium carbonate mainly comprises, by weight, 100-200 parts of light calcium carbonate, 10-15 parts of bamboo pulp fibers, 30-40 parts of cationic starch, 1-3 parts of sodium stearate, 0.01-0.05 part of sodium polyacrylate, 1-3 parts of bentonite, 0.1-0.8 part of chitosan, 0.01-0.05 part of hardening agents, 0.2-0.8 part of antioxidants, 0.5-1.5 parts of dispersing agents and 0.5-1.5 parts of coupling agents. The invention further provides a method for preparing the papermaking modified calcium carbonate. The papermaking modified calcium carbonate and the method have the advantages that the papermaking modified calcium carbonate can be uniformly dispersed and is high in retention and tear-resistant strength and good in suspension stability; the method includes simple processes, is safe and reliable and is easy to control, convenient to implement, suitable for large-scale production and low in production cost, and the like.

Description

Technical field [0001] The invention belongs to the technical field of calcium carbonate, and specifically relates to a modified calcium carbonate used for papermaking and a preparation method thereof. Background technique [0002] In the paper industry, calcium carbonate is used as a filler for paper products, which can improve the heat resistance, abrasion resistance, dimensional stability, rigidity and workability of the paper, and reduce the cost of the paper, but its surface has strong hydrophilic properties. Hydroxyl group presents a strong alkalinity. This hydrophilic and oleophobic property makes calcium carbonate and organic polymers have poor hydrophilicity and is easy to form aggregates, resulting in uneven dispersion in the polymer, resulting in two materials Interfacial defects, the direct application effect is not good, and calcium carbonate as a filler, its acid resistance, smoothness, whiteness and other properties need to be further improved. When the unmodified...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/67D21H17/69
CPCD21H17/675D21H17/69
Inventor 李文康张宸宇欧西江
Owner 广西华洋矿源材料有限公司
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