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Preparation method of papermaking filling materials

A technology of fillers and mixtures, applied in the field of compound preparation, can solve the problems of hindering the formation of particles and damage to paper strength, and achieve the effects of good stability, strong color retention and good plasticity

Inactive Publication Date: 2013-04-24
GUANGXI PUXIN PAPER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above problems that are easy to occur in paper filling technology, the present invention provides a paper filling method using modified attapulgite and kaolin as main filling materials
The problems associated with the use of finely divided fillers can be largely resolved by adding coagulants to the formulation; making fillers of various size distributions by impeding the formation of particles or removing them from the product creates optically more Effective filler with less damage to paper strength and helps maintain paper bulk

Method used

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  • Preparation method of papermaking filling materials

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preparation example Construction

[0014] figure 1 The process flow of the method for preparing papermaking fillers provided by the embodiments of the present invention is shown, and the details are as follows:

[0015] The embodiments of the present invention provide a method for preparing paper-making fillers by using attapulgite, kaolin, calcium carbonate and surface modifiers as main fillers.

[0016] In the embodiment of the present invention, the main components of the filler are attapulgite, kaolin, calcium carbonate and surface modifier.

[0017] In step S101, attapulgite and kaolin are mixed in a ratio of 1:3, and a surface modifier is added according to 1.2% of the mass of the mixture to obtain a modified composite soil;

[0018] In step S102, the modified composite soil is pressed into tablets with a twin-screw extruder, dried or dried, pulverized, and calcium carbonate is added to the mixer at a mass ratio of 1:1.7 to the composite soil;

[0019] In the embodiment of the present invention, the mod...

Embodiment 1

[0024] 1. Attapulgite 10Kg, kaolin 30Kg, add titanate coupling agent 0.48Kg, stir at room temperature for 15 minutes to obtain modified composite soil;

[0025] 2. The modified composite soil is pressed into tablets with a twin-screw extruder, dried in the sun or dried until the water mass percentage is less than 4%, and crushed to 4.3 μm;

[0026] 3. Add 68.8Kg of calcium carbonate with a thickness of 4.3 μm and a whiteness > 82 to the mixer, mix it with the modified composite soil, and stir for 20 minutes;

[0027] 4. Add 2.9Kg of titanate coupling agent to the mixture, and mix at 70°C for 40 minutes to obtain about 112Kg of modified mixed soil.

Embodiment 2

[0029] 1. Attapulgite 15Kg, kaolin 45Kg, add aluminate coupling agent 0.72Kg, stir at room temperature for 15 minutes to obtain modified composite soil;

[0030] 2. The modified composite soil is pressed into tablets with a twin-screw extruder, dried in the sun or dried until the water mass percentage is less than 4%, and crushed to 4.3 μm;

[0031] 3. Add 103.2Kg of calcium carbonate with a thickness of 4.3 μm and a whiteness > 82 to the mixer, mix it with the modified composite soil, and stir for 20 minutes;

[0032] 4. Add 4.4Kg of aluminate coupling agent to the mixture, and mix at 70°C for 40 minutes to obtain about 168Kg of modified mixed soil.

[0033] Embodiments of the present invention can largely solve the problems associated with the use of finely divided fillers by adding coagulants to the formulation; making fillers of various size distributions by impeding the formation of particles or removing them from the product would create Provides optically more effectiv...

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Abstract

The invention belongs to a field of compound preparation, and provides a preparation method of papermaking filling materials. The method comprises mixing attapulgite clay and kaolin in proportion, adding a surface modifier to obtain modified composite soil, tabletting, drying in the sun or an oven, and crushing the modified composite soil, adding a certain proportion of calcium carbonate in a mixer, uniformly mixing, finally adding the surface modifier, and mixing under a certain temperature to obtain the modified composite soil. The compound modified attapulgite clay and kaolin can be used for paper filling materials, substantially improve retention rate and intensity of the paper products, and has an important reality meaning for environment protection.

Description

technical field [0001] The invention belongs to the field of compound preparation, in particular to a method for preparing paper-making filler. Background technique [0002] High-grade paper requires the use of special fillers. The furnish is weaker, especially if the recycled fibers are synthetic, then can only withstand lower levels of fill. The introduction of four-color printing, such as newsprint, and the desire to replace fibers with high-performance fillers at lower grammages has driven the need for improved filling filler properties that can maintain or increase the required weight at lighter grammages. properties of paper. [0003] The most important filler properties for this application are light scattering and porosity. Higher light scattering is necessary for opacity, but also higher porosity to prevent ink penetration. Although these properties have limits, higher porosity does not necessarily result in higher scattering coefficients, and vice versa. Micro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/69
Inventor 梁良毅
Owner GUANGXI PUXIN PAPER IND
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