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A kind of talcum powder dispersion for papermaking and preparation method thereof

A technology of talc powder and dispersion, applied in papermaking, textile and papermaking, paper coating and other directions, can solve the problems of high viscosity and low solid content of talc powder dispersion, achieve good fluidity and coating properties, and wide application value Effect

Active Publication Date: 2017-10-17
HAINAN JINHAI PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a talcum powder dispersion for papermaking, which solves the problems of low solid content and high viscosity of the talc powder dispersion

Method used

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  • A kind of talcum powder dispersion for papermaking and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A preparation method of a talcum powder dispersion for papermaking, comprising the following steps:

[0014] Calcium carbonate pretreatment: Grinding, passing through a 325-mesh sieve to obtain 63% of calcium carbonate whose particle size is less than or equal to 2um.

[0015] 12g water is joined in the plastic beaker of 150ml, then add 0.6g solid content and be 40% dispersant, use low-speed stirrer to stir with 200rpm, add 60g solid content then while stirring and be 73% ground calcium carbonate, stir 2min, finally slowly add 40g of talcum powder with a solid content of 87%, stir for about 30min while adding, and finally mix to prepare the talcum powder dispersion for papermaking.

Embodiment 2

[0017] A preparation method of a talcum powder dispersion for papermaking, comprising the following steps:

[0018] Calcium carbonate pretreatment: Grinding, passing through a 325 mesh sieve to obtain calcium carbonate with a particle size of 65% less than or equal to 2um.

[0019] 9.6g water is joined in the plastics beaker of 150ml, add 0.7g solid content again and be the dispersant of 45%, use low-speed stirrer to stir with 200rpm, add 65g while stirring subsequently and be the ground calcium carbonate of 75% solid content, Stir for 2 minutes, and finally slowly add 35 g of talcum powder with a solid content of 90%, stir for about 30 minutes while adding, and finally mix to prepare a talc powder dispersion for papermaking.

Embodiment 3

[0021] A preparation method of a talcum powder dispersion for papermaking, comprising the following steps:

[0022] Calcium carbonate pretreatment: Grinding, passing through a 325 mesh sieve to obtain calcium carbonate with a particle size of 67% less than or equal to 2um.

[0023] 10.4g water is joined in the plastics beaker of 150ml, add 0.8g solid content again and be the dispersant of 50%, use low-speed stirrer to stir with 300rpm, add 70g while stirring subsequently and be the ground calcium carbonate of 77% solid content, Stir for 2 minutes, and finally slowly add 30 g of talc powder with a solid content of 90%, stir for about 30 minutes while adding, and finally mix to prepare a talc powder dispersion for papermaking.

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Abstract

The invention discloses a talcum powder dispersoid for papermaking. The talcum powder dispersoid for papermaking comprises 0.6-0.8 part of a dispersant, 60-70 parts of calcium carbonate, 30-40 parts of talcum powder and 9-12 parts of water, wherein the particle content of calcium carbonate with the grain size being less than or equal to 2 [mu]m is 63-67%. According to the talcum powder dispersoid for papermaking, the solid content is 70-75%, and the viscosity is 80-250cps. The content of particles with the grain size being less than or equal to 2 [mu]m in the dispersoid is 60-65%, and the dispersoid has good flowability and coating property and is suitable for preparing pigments which are supplied to continuous production of a large paper machine.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a talcum powder dispersion for papermaking and a preparation method thereof. Background technique [0002] Talc powder is hydrated magnesium silicate, and its theoretical molecular formula is 3MgO 4SiO 2 ·H 2 O. It has a layered structure, divided into three layers, the middle is an octahedral MgO layer, and the upper and lower sides are tetrahedral silica layers; the two -OH groups of talcum powder are inside, so its surface is hydrophobic. However, talc powder can improve the whiteness, opacity, smoothness and printing gloss of coated paper, and endow the paper with higher ink absorption. Talc powder is widely used as an ingredient in gravure LWC paper and coated non-mechanical wood pulp paper. Due to the hydrophobicity and flatness of talc particles, when they are in contact with water, if the surface of talc particles is not humidified in time, talc The particles are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/38D21H19/40D21H21/06
Inventor 林彬
Owner HAINAN JINHAI PULP & PAPER