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A cubic light calcium carbonate filler composition and its preparation method and application

A light calcium carbonate, cube technology, applied in the field of papermaking fillers, can solve the problems of AKD affinity impairing the sizing effect, affecting the filler, impairing the sizing and paper strength, etc.

Active Publication Date: 2022-04-01
DSSUN NEW MATERIAL SHANDONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, fillers with a higher specific surface area can improve paper printing performance (such as ink absorption, etc.), but at the same time it will also affect the retention of fillers, resulting in selective adsorption of additives, damage to sizing and paper strength (in the same addition When the amount is high, the specific surface area of ​​the filler is higher, and the strength of the paper sheet is weaker)
Precipitated calcium carbonate used as paper-making filler is mainly scalenohedral calcite (rose flower shape), and the specific surface area is usually around 6.0-8.0㎡ / g. The obvious disadvantage of this ordinary PCC is that the affinity of large specific surface area to AKD damages sizing effect, with a greater negative impact on strength

Method used

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  • A cubic light calcium carbonate filler composition and its preparation method and application
  • A cubic light calcium carbonate filler composition and its preparation method and application
  • A cubic light calcium carbonate filler composition and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of the cubic light calcium carbonate filler composition: add the cubic light calcium carbonate filler into the reaction kettle, stir and heat to 60°C. Add 0.25 part of solution-type cationic starch with a concentration of 3% into the filler, stir evenly, and keep warm for 30 minutes. Water was added to adjust the solids content of the filler composition to 18%.

[0031] The application method of cubic light calcium carbonate filler composition (the filler composition is prepared according to the above method by using ordinary light calcium filler and the application comparison is carried out according to the following method):

[0032] Pulp ratio: coniferous pulp (400SR): hardwood pulp (350SR): chemical-mechanical pulp = 25:17:58

[0033] Mixing degree of beating: 350SR, wet weight 0.4g

[0034] Quantitative copying: 120g / m 2

[0035] Papermaking process: pulp (70%) + AKD (20Kg / t paper) + filler composition (30%) + CPAM (300ppm);

[0036] According to t...

Embodiment 2

[0042] Preparation of the cubic light calcium carbonate filler composition: add the cubic light calcium carbonate filler into the reaction kettle, stir and heat to 60°C. Add 0.25 part of solution-type cationic starch with a concentration of 3% into the filler, stir evenly, and keep warm for 30 minutes. Water was added to adjust the solids content of the filler composition to 18%.

[0043] The application method of cubic light calcium carbonate filler composition (the filler composition is prepared according to the above method by using ordinary light calcium filler and the application comparison is carried out according to the following method):

[0044]Pulp ratio: coniferous pulp (400SR): hardwood pulp (350SR): chemical-mechanical pulp = 25:17:58

[0045] Mixing degree of beating: 350SR, wet weight 0.4g

[0046] Quantitative copying: 120g / m 2

[0047] Papermaking process: pulp (65%) + AKD (20Kg / t paper) + filler composition (35%) + CPAM (300ppm);

[0048] According to th...

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Abstract

The invention discloses a cubic light calcium carbonate filler composition, the components of which are: 100 parts of cubic light calcium carbonate filler and 0.03-0.25 parts of cationic polymer. The invention also discloses a preparation method of the above-mentioned cubic light calcium carbonate filler composition, comprising the following steps: adding the cationic polymer to the cubic light calcium carbonate filler, controlling the temperature at 60-80°C, keeping the temperature for 30-60min, adding water Adjust the solid content to 15‑20%. The invention uses cubic light calcium carbonate as a carrier, and obtains a cubic light calcium carbonate filler composition by adding cationic polymers for mixing modification. After it is filled into the pulp as a filler, it can improve the tensile strength and internal bonding strength of the paper-making sample, and at the same time save the amount of AKD and reduce the cost of papermaking. At the same time, the cationic polymer as a modifier can improve the filler. Retain and promote the sizing effect, so that the ash content and retention rate of the handmade paper sample are improved.

Description

technical field [0001] The invention relates to the field of paper-making fillers, in particular to a cubic light calcium carbonate filler composition and a preparation method and application thereof. Background technique [0002] Light calcium carbonate is one of the most commonly used fillers in the paper industry. Using fillers instead of paper fibers can reduce production costs and improve the optical properties, printing properties and appearance of paper. As an important inorganic chemical raw material, light calcium carbonate produced by ordinary carbonization method is mostly spindle-shaped or needle-rod-shaped, with a wide range of particle size distribution and a large specific surface area; in addition, by adding additives And the nano-scale light calcium carbonate crystal form that can be obtained by controlling the reaction conditions is mostly cubic, generally less than 100nm, has a high specific surface area, and is easy to agglomerate, usually cannot be direc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/67
CPCD21H17/675
Inventor 施晓旦刘莹傅斌
Owner DSSUN NEW MATERIAL SHANDONG
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