Low-quantification and high-strength coating white board paper and preparation process thereof

A high-strength, low-weight technology, applied in the field of papermaking, can solve problems such as thickness reduction, low-weight paper and cardboard, and stiffness reduction, and achieve the effect of ensuring low-weight, high-strength, and uniform paper banners

Inactive Publication Date: 2015-03-04
浙江光明纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low quantification of paper and cardboard will lead to a decrease in thickness, which will eventually cause the strength, opacity, stiffness and print-through problems of writing and printing paper; the stiffness and ring pressure strength of cardboard cannot meet the requirements of subsequent processing or use, etc.

Method used

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  • Low-quantification and high-strength coating white board paper and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of surface bleached wood pulp

[0046] The bleached commercial wood pulp boards of bleached hardwood pulp LBKP and bleached softwood pulp NBKP are transported to the hydraulic pulper for disintegration by the chain plate machine, and then enter the pulp storage tower for storage. The pulp is pumped to the high-consistency desander Heavy impurities are sent to pulping after being beaten in series by a refiner, and are used as the surface layer of the cardboard to bleach the chemical pulp layer;

[0047] Wherein the proportioning amount of bleached hardwood pulp is 50%, the proportioning amount of bleached softwood pulp is 50%, and the beating degree of the slurry is controlled at 40°SR.

[0048] (2) Preparation of waste paper pulp

[0049] The waste paper is conveyed by the chain plate machine to the drum pulper for disintegration, and then enters the pulp storage tower for storage. The pulp is pumped to the high-concentration desander to remove heavy im...

Embodiment 2

[0054] Its operation step is identical with embodiment 1, and difference is:

[0055] (3) Preparation and molding of layered slurry

[0056] The slurry sent from the pulping workshop is added with auxiliary materials including retention aid and enhancer. The enhancer is mainly added to the surface layer slurry, and each layer of retention aid needs to be added, and then sent to the paper machine by frequency conversion and speed regulation slurry pump The white water tank outside the machine is mixed and diluted with concentrated white water, and is sent to the pressure screen for screening through the slurry pump, and then enters the headbox. Layer 0.8%; After the slurry is online, it is formed by four-fold net, pressed, dried, surface sizing, re-dried, and calendered, and then enters the coating system. After surface sizing, surface pre-coating, mid-coating and top-coating, the base paper is dried in a hot air drying oven and then enters the conditioning tank, soft calender...

Embodiment 3

[0059] Its operation step is identical with embodiment 1, and difference is:

[0060] (3) Preparation and molding of layered slurry

[0061] The slurry sent from the pulping workshop is added with auxiliary materials including retention aid and enhancer. The enhancer is mainly added to the surface layer slurry, and each layer of retention aid needs to be added, and then sent to the paper machine by frequency conversion and speed regulation slurry pump The white water tank outside the machine is mixed and diluted with concentrated white water, and is sent to the pressure screen for screening through the slurry pump, and then enters the headbox. Layer 0.8%; After the slurry is online, it is formed by four-fold net, pressed, dried, surface sizing, re-dried, and calendered, and then enters the coating system. After surface sizing, surface layer pre-coating, mid-coating and top-coating, the raw paper is dried in a hot air drying oven and then enters the conditioning cylinder, soft...

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Abstract

Embodiments of the present invention disclose low-quantification and high-strength coating white board paper and a preparation process thereof. The low-quantification and high-strength coating white board paper comprises raw paper and a surface coating layer, wherein the surface coating layer further comprises a pre-coating, a middle coating and a surface coating, the coating materials of the pre-coating and the middle coating comprise 70-90% of calcium carbonate, 10-30% of kaolin, 0.1-0.3% of a dispersant, 8-12% of an adhesive, 0.3-0.7% of a water resistant agent, and 0-0.5% of a lubricant, and the coating materials of the surface coating comprise 50-70% of calcium carbonate, 20-50% of kaolin, 0-10% of a plastic pigment, 0.1-0.3% of a dispersant, 10-14% of an adhesive, 0.4-1.0% of a water resistant agent, and 0.4-1.0% of a lubricant. According to the present invention, with the optimized design of the pulps in each layer of the coating white board paper, the core pulp ratio is preferably selected, the coating material formula and the filler adding process are improved, the reliable film transfer type surface sizing is adopted, and the low-quantification and the high-strength of the paper board are ensured.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a low-weight high-strength coated white board paper and a preparation process thereof. Background technique [0002] Recently, with the enhancement of people's awareness of environmental protection, the requirements for "low-carbon economy" are getting higher and higher. Saving resources, saving energy and reducing emissions are the basic national policies of my country's sustainable development. With the advent of the era of low-carbon economy, the paper industry is paying more and more attention to environmental protection and sustainable development, which also forces the paper industry to change its inherent concepts and innovate existing production techniques. In the face of global problems such as resource shortages, energy shortages, and high environmental pressures, the overall development trend of papermaking industry technology will save resources and ac...

Claims

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Application Information

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IPC IPC(8): D21H19/82D21H19/38D21H19/40D21H19/14D21H11/14D21H11/02D21G1/00D21F11/00
Inventor 梁忠平何勇华胡志军
Owner 浙江光明纸业有限公司
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