Environment-friendly low-basis-weight coated duplex board with grey back and preparation method thereof

A technology of low-weight, white board paper, applied in the field of papermaking, can solve the problems of difficult reduction of base paper price, large consumption of raw materials, high production cost, etc., and achieve the effect of improving the stiffness of the paper sheet, increasing the bonding strength, and reducing the number of production links

Inactive Publication Date: 2017-07-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the traditional gray-bottomed white board uses four-layer forming wire, the production process is complicated, the energy consumption is large, and the control system is complicated and difficult to control
The core layer mostly uses OCC waste paper pulp, which consumes a large amount of OCC waste paper pulp. During the production process, grading screens, thermal dispersion and multiple purification and screening are performed. There are ma

Method used

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  • Environment-friendly low-basis-weight coated duplex board with grey back and preparation method thereof
  • Environment-friendly low-basis-weight coated duplex board with grey back and preparation method thereof
  • Environment-friendly low-basis-weight coated duplex board with grey back and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Prepare each layer of slurry

[0058] Prepare surface layer slurry, core layer slurry and bottom layer slurry according to the components shown in Table 1 respectively;

[0059] (2) Base paper preparation

[0060] ①Wet paper is formed by a three-layer net paper machine

[0061] Among them, the paper dryness at the end of the wire is about 25%. The three-layer forming net is arranged horizontally in sequence, and the bottom layer, the core layer, and the surface layer are respectively copied, and the starch solution is sprayed before the bottom layer and the core layer, and the core layer and the surface layer are combined. 1.0% of the dry mass, the temperature is 65°C, and the composite dryness of the bottom layer and the core layer, the core layer and the surface layer is about 15%;

[0062] Wherein the online concentration is 0.2wt% for the surface layer, 0.6wt% for the core layer, and 0.3wt% for the bottom layer;

[0063] ② squeeze

[0064] The base paper we...

Embodiment 2

[0086] (1) Prepare each layer of slurry

[0087] Prepare surface layer, core layer and bottom layer slurry according to component shown in table 4 respectively;

[0088] (2) Base paper preparation

[0089] ①Wet paper is formed by a three-layer net paper machine

[0090] Among them, the paper dryness at the end of the wire is about 25%. The three-layer forming net is arranged horizontally in sequence, and the bottom layer, the core layer, and the surface layer are respectively copied, and the starch solution is sprayed before the bottom layer and the core layer, and the core layer and the surface layer are combined. 1.0% of the dry mass, the temperature is 65°C, and the composite dryness of the bottom layer and the core layer, the core layer and the surface layer is about 15%;

[0091] Wherein the online concentration is 0.27wt% for the surface layer, 0.88wt% for the core layer, and 0.3wt% for the bottom layer;

[0092] ② squeeze

[0093] The base paper wet paper web is se...

Embodiment 3

[0115] (1) Prepare each layer of slurry

[0116] Prepare surface layer, core layer and bottom layer slurry according to component shown in table 7 respectively;

[0117] (2) Base paper preparation

[0118] ①Wet paper is formed by a three-layer net paper machine

[0119] Among them, the paper dryness at the end of the wire is about 25%. The three-layer forming net is arranged horizontally in sequence, and the bottom layer, core layer, and surface layer are respectively copied, and the starch solution is sprayed before the bottom layer and the core layer, and the core layer and the surface layer are combined. 1.0% of the dry mass, the temperature is 65°C, and the composite dryness of the bottom layer and the core layer, the core layer and the surface layer is about 15%;

[0120] Wherein the online concentration is 0.3wt% for the surface layer, 1.17wt% for the core layer, and 0.3wt% for the bottom layer;

[0121] ② squeeze

[0122] The base paper wet paper web is sent to the...

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Abstract

The invention belongs to the technical field of papermaking and particularly relates to an environment-friendly low-basis-weight coated duplex board with grey back and a preparation method thereof. The environment-friendly low-basis-weight coated duplex board with grey back includes a coating layer, a front glue applied layer, a surface layer, a core layer, a bottom layer, and a back glue applied layer, all the layers being laminated by spraying a starch solution. In the invention, a mechanical thermal pulp TMP for producing medium-density polymeric plates is employed, wherein the mechanical thermal pulp is environment-friendly and low-cost, and has wide sources. In addition, the invention mainly provides a production technology of the low-basis-weight coated duplex board with grey back by applying the novel environment-friendly TMP pulp. The technology mainly includes three-layer mesh lamination shaping, spraying starch solution as interlayer adhesive and the like processes, so that the coated duplex board with grey back has excellent performance, is environment-friendly and energy-saving, and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to an environment-friendly low-quantity gray-bottomed white board paper and a preparation method thereof. Background technique [0002] Coated white board paper is a processed cardboard made by coating white paint on the original cardboard and then finishing. It is one of the most common packaging materials in China at present, and its weight is generally 200g / m 2 above. [0003] The traditional gray-bottomed white board paper uses a four-layer forming wire to prepare a four-layer composite base paper including a surface layer, a lining layer, a core layer and a bottom layer, and then it is made by three layers of coating. Because the traditional gray-bottomed whiteboard uses four-layer forming wire, the production process is complicated, the energy consumption is large, and the control system is complicated and difficult to control. The core layer mostly uses OCC ...

Claims

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Application Information

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IPC IPC(8): D21H11/14D21H11/08D21H17/29D21H21/16D21H17/67D21H19/38D21H19/40D21F11/00D21H27/10
CPCD21F11/00D21H11/08D21H11/14D21H17/29D21H17/675D21H19/385D21H19/40D21H21/16D21H27/10
Inventor 杨仁党王阳刘旭张明
Owner SOUTH CHINA UNIV OF TECH
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