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Natural-color liquid packaging paper and production process thereof

A packaging paper and liquid technology, applied in the field of papermaking, can solve the problems of affecting the uniformity of the surface layer slurry, affecting the covering property, etc., and achieve the effect of improving the surface covering property, reducing the gram weight, and reducing the requirements of forming and dehydration.

Inactive Publication Date: 2016-12-21
ZHUHAI S E Z HONGTA RENHENG PAPER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing natural color liquid-wrapped paper is made by three-layer netting. In the three-layer netting, because the color of the core layer and the bottom layer needs to be covered, the weight of the paper surface layer is higher than that of the general white cardboard surface layer. , there are high requirements for the forming and dehydration of the surface layer net case. If the forming quality of the surface layer is not good, it will affect the uniformity of the surface layer slurry and affect the covering property.

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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  • Natural-color liquid packaging paper and production process thereof
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  • Natural-color liquid packaging paper and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of natural color liquid wrapping paper, it comprises following production steps:

[0038] 1. Pulping steps

[0039] a. The pulping process of the surface paper layer: After the pulp board is disintegrated by a hydropulper according to a certain ratio, it is screened, beaten, and pulped, and finally the paper feeder is sent for copying, wherein, by weight percentage, the surface paper The pulp composition of the paper layer is: 40% bleached hardwood kraft pulp, 60% bleached softwood kraft pulp.

[0040] b. The pulping process of the backing paper layer: After the pulp board is disintegrated by a hydropulper according to a certain ratio, it is screened, beaten, and pulped, and finally the paper feeder enters the paper making process, wherein, in terms of weight percentage, the surface The pulp composition of the paper layer is: 40% bleached hardwood kraft pulp, 60% bleached softwood kraft pulp.

[0041] c. The pulping process of the core paper layer: After the pu...

Embodiment 2

[0055] The production process of the natural color liquid wrapping paper of the present embodiment is similar to embodiment 1, and difference is:

[0056] In this embodiment, by weight percentage, the slurry composition of the face paper layer is: 30% bleached hardwood kraft pulp, 70% bleached softwood kraft pulp; the slurry composition of the backing paper layer is : 70% bleached hardwood kraft pulp, 30% bleached softwood kraft pulp; the pulp composition of the core paper layer is: 10% chemithermomechanical pulp, 80% unbleached virgin wood pulp, 10% broken paper ; The slurry composition of the bottom paper layer is 100% unbleached virgin wood pulp.

[0057] In the wet end chemical step of this embodiment, based on the weight of each layer of slurry, the amount of aluminum sulfate added is: face paper layer 30kg / t, backing paper layer 15kg / t, core paper layer 6kg / t, bottom paper Layer 16kg / t; the amount of cationic rosin added is: face paper layer 50kg / t, backing paper layer ...

Embodiment 3

[0063] The production process of the natural color liquid wrapping paper of the present embodiment is similar to embodiment 1, and difference is:

[0064] In this embodiment, by weight percentage, the slurry composition of the face paper layer is: 70% bleached hardwood kraft pulp, 30% bleached softwood kraft pulp; the slurry composition of the lining paper layer is: : 30% bleached hardwood kraft pulp, 70% bleached softwood kraft pulp; the pulp composition of the core paper layer is: 40% chemical thermomechanical pulp, 30% unbleached virgin wood pulp, 30% broken paper ; The slurry composition of the bottom paper layer is 100% unbleached virgin wood pulp.

[0065]In the wet end chemical step of this embodiment, based on the weight of each layer of slurry, the amount of aluminum sulfate added is: face paper layer 15kg / t, backing paper layer 30kg / t, core paper layer 30kg / t, bottom paper Layer 30kg / t; the amount of cationic rosin added is: face paper layer 5kg / t, backing paper lay...

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 discloses natural-color liquid packaging paper, comprising a body paper layer, and a coating layer and a back-coating layer respectively coating the upper surface and the bottom surface of the body paper layer, wherein the body paper layer comprises a surface paper layer, a lining paper layer, a core paper layer and a bottom paper layer which are stacked in sequence from top to bottom. The natural-color liquid packaging paper is produced by the following steps: respectively draining pulp of the surface paper layer, the lining paper layer, the core paper layer and the bottom paper layer, compounding, squeezing, drying, and performing surface sizing to obtain the body paper layer; performing hard calendaring on the body paper layer, then coating the upper surface and the bottom surface of the body paper layer, and drying. The liquid packaging paper adopts a four-layer structure, thus reducing forming and dewatering requirements, effectively improving evenness of surface pulp, and improving the surface covering property of the paper. Besides, a mode of combining measuring stick pre-coating, ceramic scraper core-coating and soft-blade scraper surface-coating is adopted, thus effectively improving the covering property of the paper, and meeting the packaging requirements of various printing patterns in a later period.

Description

technical field [0001] The invention relates to a natural color liquid wrapping paper capable of effectively improving the covering property of the natural color of base paper and a production process thereof, belonging to the technical field of papermaking. Background technique [0002] As a high-grade liquid food packaging paper, natural color liquid packaging paper has extremely high requirements for paper printing and packaging. As one of the important indicators, the hiding property can generally be improved by increasing the weight of the surface layer and improving the uniformity of the chemical pulp of the surface layer, using coatings with excellent hiding properties, and new doctor blade combination coating to improve the surface covering property of the paper. At present, the existing natural color liquid-wrapped paper is made by three-layer netting. In the three-layer netting, because the color of the core layer and the bottom layer needs to be covered, the weigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H11/04D21H11/02D21H19/40D21H19/38D21H19/84D21H23/34D21H23/52D21F11/00
CPCD21H27/10D21F11/00D21H11/02D21H11/04D21H19/385D21H19/40D21H19/84D21H23/34D21H23/52
Inventor 季向东吴义荣徐海东
Owner ZHUHAI S E Z HONGTA RENHENG PAPER
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