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White manila board and preparation method thereof

A whiteboard paper and gray bottom technology, applied in the field of papermaking, can solve the problems of large chemicals and power consumption, large loss of raw materials, low yield, etc., and achieve lower production costs, lower whiteness requirements, and good printing adaptability. Effect

Active Publication Date: 2015-09-02
JIAN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the traditional gray-bottomed whiteboard production process uses four-layer forming wire, the production process is more complex and consumes more energy. In addition, the complex process is not conducive to the control of process indicators.
The bottom layer is made of waste paper deinked pulp. Among them, waste paper deinked pulp raw materials are relatively expensive, and the process of waste paper deinked pulp production process is lengthy, consumes a lot of chemicals and power energy, and the loss of raw materials is large and the yield is low. This makes the production cost of waste paper deinking pulp high
The traditional production process uses a four-layer forming fabric. After compounding the bottom layer, core layer, liner layer and surface layer with four layers of slurry, and then three layers of coating, the gray-bottomed whiteboard produced in this way has a high ration, which is difficult to satisfy customers. Widespread demand for low basis weight gray-backed whiteboard

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
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  • White manila board and preparation method thereof
  • White manila board and preparation method thereof
  • White manila board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Configure each layer of slurry

[0057] Form the slurry of surface layer, core layer and bottom layer according to the composition preparation shown in table 1 respectively;

[0058] (2) Preparation of base paper

[0059] ①Wet paper sheet is formed by three-layer forming wire

[0060] Each layer of slurry is transported to the headbox of the paper machine through its own feeding system, and a certain concentration of the above-mentioned layers of slurry is applied to the three-layer forming wire to form a wet paper sheet, and then the above wet paper sheet is dehydrated and compounded. and high-vacuum suction to produce base paper with a dryness of more than 22%, wherein the three-layer forming wire is arranged in sequence along the horizontal direction, and a top wire is arranged on the bottom forming wire to enhance the dehydration effect and improve the evenness of the base paper , wherein, the slurry concentration forming the surface layer is 0.3wt%, the slurr...

Embodiment 2

[0084] (1) Configure each layer of slurry

[0085] Prepare the slurry forming surface layer, core layer and bottom layer according to the composition shown in table 3 respectively;

[0086] (2) Preparation of base paper

[0087] ①Wet paper sheet is formed by three-layer forming wire

[0088] Each layer of slurry is transported to the headbox of the paper machine through its own feeding system, and a certain concentration of the above-mentioned layers of slurry is applied to the three-layer forming wire to form a wet paper sheet, and then the above wet paper sheet is dehydrated and compounded. and high-vacuum suction to produce base paper with a dryness of more than 22%, wherein the three-layer forming wire is arranged in sequence along the horizontal direction, and a top wire is arranged on the bottom forming wire to enhance the dehydration effect and improve the evenness of the base paper , wherein, the slurry concentration forming the surface layer is 0.3wt%, the slurry co...

Embodiment 3

[0112] (1) Configure each layer of slurry

[0113] Prepare the slurry forming surface layer, core layer and bottom layer according to the composition shown in table 5 respectively;

[0114] (2) Preparation of base paper

[0115] ①Wet paper sheet is formed by three-layer forming wire

[0116] Each layer of slurry is transported to the headbox of the paper machine through its own feeding system, and a certain concentration of the above-mentioned layers of slurry is applied to the three-layer forming wire to form a wet paper sheet, and then the above wet paper sheet is dehydrated and compounded. and high-vacuum suction to produce base paper with a dryness of more than 22%, wherein the three-layer forming wire is arranged in sequence along the horizontal direction, and a top wire is arranged on the bottom forming wire to enhance the dehydration effect and improve the evenness of the base paper , wherein, the slurry concentration forming the surface layer is 0.4wt%, the slurry co...

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
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Abstract

The invention belongs to the technical field of papermaking, and particularly relates to a white manila board and a preparation method thereof. Three layers of forming nets and two passes of coating (curtain coating and knife coating) are adopted for the white manila board; moreover, a core layer and a bottom layer are manufactured by adopting recycled fiber pulp which is low-cost and is further more environment-friendly to replace wastepaper de-inked pulp; not only can a production process of the white manila board be greatly simplified and optimized, but also the consumption of chemicals and the power consumption can be greatly decreased, so that the qualified and low-basis-weight white manila board which more accords with market requirements can be produced with low cost.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to gray-bottomed white board paper and a preparation method thereof. Background technique [0002] The traditional gray-bottomed white board paper production process uses a four-layer forming wire to prepare base paper including a four-layer structure - surface layer, lining layer, core layer and bottom layer (not including the coating layer), wherein the bottom layer is made of waste paper deinking pulp production. In addition, in order to cooperate with the surface layer, lining layer and core layer, the coating layer included in the above-mentioned gray bottom white board paper is also realized by three coats. Because the traditional gray-bottomed white board paper production process uses four-layer forming wire, the production process is more complicated and the energy consumption is larger. In addition, the complex process is not conducive to the control of pro...

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
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/18D21H17/67D21H21/16D21H21/10D21F11/00
Inventor 舒君明王宏伟寿磊铭陆勇杨芳华刘涛
Owner JIAN GRP
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