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A kind of double-layer structure paper and its production method

A technology of double-layer structure and background color, applied in the field of papermaking, can solve the problems of decreased adhesion and shedding of wood pulp fiber webs, and achieve the effects of good artistic effect, good surface fluffing characteristics and good artistic effect.

Active Publication Date: 2021-03-30
SHANDONG KAILI SPECIAL PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after SWP fiber is added to wood pulp, the adhesion between different layers of wood pulp fiber webs is reduced, resulting in the possibility of detachment between wood pulp fiber web layers under the conditions of humidity and temperature changes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 120g / m 2 The preparation method of double-layer structural paper with white surface and blue background, which is produced by two rotary screens and two sets of sizing system structural paper machines, and the sizing flow delivery system of one rotary screen paper machine is blue pulp, and the weight is 70g / m on the Internet. 2 , the other part of the sizing and flow delivery system of the rotary paper machine is white paper, and the weight is 50g / m on the Internet. 2 , and include the following steps:

[0025] (1) Ratio of pulp in the circular wire section of white tissue paper: 30% of softwood pulp from Kelly, 20% of hardwood pulp from Rizhao, and 50% of SWP fiber. The coniferous wood pulp and hardwood pulp are mixed and beaten by double disc mills, the beating degree is 55±1oSR, and the wet weight is 6.0-6.5g. SWP fibers are disintegrated using a hydropulper. The dosage of AKD sizing agent is 0.7%, the dosage of PAE wet strength agent is 1.0%, the dosage of cation...

Embodiment 2

[0029] 180g / m 2 The preparation method of double-layer structure paper with white surface and gray bottom, which adopts a Fourdrinier and one rotary wire structure, and is produced by two paper machines with sizing system. 2 , the sizing flow system part of the rotary screen is white paper, and the weight is 50g / m on the Internet. 2 , and include the following steps:

[0030] (1) Ratio of pulp in the circular wire section of white tissue paper: 30% of softwood pulp from Kelly, 20% of hardwood pulp from Rizhao, and 50% of SWP fiber. The coniferous wood pulp and hardwood pulp are mixed and beaten by double disc mills, the beating degree is 55±1oSR, and the wet weight is 6.0-6.5g. SWP fibers are disintegrated using a hydropulper. The dosage of AKD sizing agent is 0.7%, the dosage of PAE wet strength agent is 1.0%, the dosage of cationic starch in pulp is 1.2%, and the dosage of polyacrylamide retention aid is 100PPM.

[0031] (2) The pulp ratio of the fourdrinier part of the ...

Embodiment 3

[0034] The difference between this embodiment and Example 1 is that in the surface layer paper, by weight, softwood pulp and hardwood pulp are calculated as 20 parts by absolute dry weight, and the proportion of SWP fiber is calculated by total absolute dry weight. The total fiber weight is 80 parts.

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Abstract

The invention discloses double-layer paper capable of revealing ground color after hot pressing and a production method thereof. The paper comprises bottom-layer paper and surface-layer paper, whereinthe bottom-layer paper is colored paper; the surface-layer paper is white paper and comprises softwood pulp, hardwood pulp and SWP fiber; and in the surface-layer paper, the softwood pulp and the hardwood pulp account for 20-60 parts by weight according to the absolute dry weight and the SWP fiber accounts for 40-80 parts by weight of the total fiber weight according to the total absolute dry weight. The double-layer paper obtained in the invention has the characteristics of being good in surface fluffing characteristic and uniform in heat discoloration; the paper can become transparent afterbeing subjected to hot pressing of a hot plate so as to reveal the color of the bottom paper; and the pattern of the hot plate is formed on the surface of the paper, so that the paper has a good artistic effect.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a double-layer structured paper with ironed-through revealing background color and a production method thereof. Background technique [0002] We know that there are many types of paper with double-layer structure and multi-layer structure, such as kraft linerboard, white cardboard, gray-bottomed white board paper, tea bag filter paper, etc. These types of double-layer and multi-layer structure paper are some Give the surface paper good strength, such as kraft liner paper; some surface paper uses chemical wood pulp, and the core layer uses groundwood pulp to reduce production costs, such as white cardboard; some surface paper uses white, and the bottom paper uses Waste paper pulp, such as gray-bottomed white board paper; some endow the surface layers with the function of being bonded together by heat, such as tea filter bag paper. [0003] SWP pulp is a kind of polyolefin, mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/30B32B29/00D21F11/00
CPCB32B29/005D21F11/00D21H27/30
Inventor 周大仕车明阳于彦凤单秋萍
Owner SHANDONG KAILI SPECIAL PAPER