Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of preparation method of wet papermaking coating slurry

A slurry and coating technology, which is applied in paper coating, papermaking, textiles and papermaking, etc., can solve the problems of incapable of talc peeling effect and inability to retain talc lamellar structure, and achieve good dispersion, high aspect ratio, and whiteness high degree of effect

Active Publication Date: 2022-07-12
辽宁艾海滑石有限公司
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, talc powder with high fineness is currently processed on jet mills, which cannot form a good peeling effect on talc and cannot retain a complete talc lamellar structure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of wet papermaking coating slurry
  • A kind of preparation method of wet papermaking coating slurry
  • A kind of preparation method of wet papermaking coating slurry

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] A preparation method of wet papermaking coating slurry, the method uses talc and brucite composite powder as main raw materials, and the specific method includes: crushing talc and brucite block materials into slag below 20 mm, mixing Then use Raymond mill to grind into 150-200 mesh coarse powder, then add wetting agent, viscosity reducer and water to the powder to make a slurry, and then send it to a ball mill for grinding. During the grinding process, add grinding aid hexagonal Sodium phosphate, the ground slurry liquid is filtered through a screen, filled as a finished product and stored; the added amount of the grinding aid is 0.05wt%-0.08wt% of the composite powder of talc and brucite.

[0019] The whiteness of the talc is greater than or equal to 90, and the loss on ignition is less than or equal to 6.5%; the whiteness of the brucite is greater than or equal to 93, and the purity is greater than or equal to 69%.

[0020] The mixing mass ratio of the talc coarse po...

Embodiment 1

[0024] 1) Select talc blocks with loss on ignition ≤ 6.5% and whiteness ≥ 90; brucite blocks with purity ≥ 69% and whiteness ≥ 93 are crushed into slag below 20mm by a crusher, according to 85 : 15 mass ratio mixed evenly, sent to Raymond machine to grind into 150-200 mesh composite powder.

[0025] 2) Turn on the disperser, add 95kg of water, add 0.09wt% (for composite powder) alkylphenol polyoxyethylene ether, and after 10 minutes of dispersion, add 0.05wt% (for composite powder) polydimethylsilicon Oxane dispersion, after 15 minutes of dispersion, slowly add 205kg of composite powder of talc and brucite within 30 minutes, and then disperse for 10 minutes to form a slurry of composite powder.

[0026] 3) The composite powder slurry is sent to a ball mill, 0.065wt% (for composite powder) sodium hexametaphosphate is added for fine grinding, and the ground powder slurry is filtered through a screen and sent to a finished product tank.

Embodiment 2

[0028] 1) Select talc blocks with ignition loss ≤ 6.5% and whiteness ≥ 90; brucite blocks with purity ≥ 69% and whiteness ≥ 93 are crushed into slag below 20mm by a crusher, according to 83 : 17 mass ratio, mix evenly, send it to Raymond machine and grind it into 150-200 mesh composite powder.

[0029] 2) Turn on the dispersing machine, add 93kg of water, add 0.11wt% (to the composite powder) of alkylphenol polyoxyethylene ether, after 10 minutes of dispersion, add 0.06wt% (to the composite powder) of polydimethylsilicon For the oxane dispersion, after 15 minutes of dispersion, 207 kg of the composite powder of talc and brucite was slowly added within 30 minutes, and then dispersed for 10 minutes to form a slurry of the composite powder.

[0030] 3) The composite powder slurry is sent to a ball mill, and 0.07wt% (for composite powder) sodium hexametaphosphate is added for fine grinding, and the ground powder slurry is filtered through a screen and sent to a finished product ta...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
whitenessaaaaaaaaaa
loss on ignitionaaaaaaaaaa
whitenessaaaaaaaaaa
Login to View More

Abstract

A preparation method of wet papermaking coating slurry, the method uses talc and brucite composite powder as main raw materials, and the specific method includes: crushing talc and brucite block materials into slag below 20 mm, mixing After that, it is ground into 150-200 mesh coarse powder with a Raymond mill, and then a wetting agent, a viscosity reducer and water are added to the powder to prepare a slurry liquid, and then sent to a ball mill for grinding. During the grinding process, a grinding aid hexagonal is added. Sodium phosphate, after the grinding slurry is filtered through a screen, it is filled as a finished product and stored; the added amount of the grinding aid is 0.05wt%-0.08wt% of the composite powder of talc and brucite. The present invention adopts block brucite, which will become flake after grinding, and its properties are similar to talc, with good peelability, high aspect ratio, high whiteness and good dispersibility in water. These properties just make up for some of the deficiencies of talc used in paper coatings.

Description

technical field [0001] The invention relates to the technical field of preparation of papermaking coatings, in particular to a preparation method of a talc-based wet-process papermaking coating slurry. Background technique [0002] my country's coated paper market is vast, and there is a large demand for coatings. At present, high-end kaolin is used as the main raw material for coatings, but the output of high-end kaolin is low and the price is high. Many enterprises cannot afford the high cost. Sometimes domestic coatings are not available, and many paper mills have to rely on imported coatings. Therefore, there is an urgent need for a low-cost, high-yield raw material to replace the existing coating raw material. [0003] Studies have shown that in the application of papermaking coatings, talc can completely or partially replace kaolin, which is scarce and expensive in domestic resources. Talc is used as a coating pigment, which has good fiber covering ability and printi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/40D21H19/38D21H19/62B02C21/00
CPCD21H19/40D21H19/385D21H19/62B02C21/00
Inventor 宋微李磊李铁民刘玉海范虹杨升旗
Owner 辽宁艾海滑石有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com