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Packaging paperboard and preparation method thereof

A technology for packaging cardboard and surface paper layers, which is applied to special paper, chemical instruments and methods, paper/cardboard layered products, etc., and can solve problems such as glue drying and pressing, high product humidity, and affecting packaging quality and grade.

Inactive Publication Date: 2017-10-20
ASIA SYMBOL SHANDONG PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Composite materials such as white board paper, aluminum foil cardboard, etc. are not easy to recycle, and a large amount of plastic, gold and silver cardboard and other insoluble pollutants have brought great pressure to our environment
In addition, the mounting process of white board paper is complicated, too many sheets are pasted, and the product is prone to warping; the product has too much humidity, and the ability to penetrate and lose water is poor, and it will turn yellow when left for a long time; The surface paper and the bottom paper are not in the same position, and the edges of the paper are not on the same line, so the paper is not allowed to be mounted; the glue is not fully or fully applied, or the glue is dry or the pressing is not enough when mounting; because the strength of the adhesive is not enough. , the delamination of the packaging will affect the quality and grade of the packaging, and cannot achieve a good sales effect

Method used

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  • Packaging paperboard and preparation method thereof
  • Packaging paperboard and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0038] The application also provides a method for preparing packaging cardboard, comprising the following steps:

[0039] After mixing 5wt%-30wt% bleached kraft pulp with 70wt%-95wt% undried chemical broadleaf fresh pulp, it enters the bottom headbox of the laminated paper machine;

[0040] Mix 15wt%-45wt% bleached chemical thermomechanical hardwood pulp with 55wt%-85wt% bleached chemical thermomechanical softwood pulp, and enter the core layer headbox of the laminated paper machine;

[0041] Mix 15wt%-60wt% bleached kraft pulp with 40wt%-85wt% undried chemical broadleaf fresh pulp, and enter the surface layer headbox of the laminated paper machine;

[0042] The base paper comprising the bottom paper layer, the core paper layer and the face paper layer which are stacked in sequence is obtained through the stacked net forming of the stacked net paper machine;

[0043] The base paper is dried after pressing, dried again after sizing on the surface, then hard calendered, soft ca...

Embodiment 1

[0053] The weight of the face paper layer is 52g / m 2 , using 55wt% undried chemically bleached broadleaf fresh pulp and 45wt% bleached kraft softwood pulp; the weight of the core paper layer is 256g / m 2 , using 70wt% bleached chemical thermomechanical softwood pulp board and 30wt% bleached chemical thermomechanical hardwood pulp board; the basis weight of the bottom paper layer is 42g / m 2 , using 80wt% undried chemically bleached hardwood fresh pulp and 20wt% bleached kraft softwood pulp board. Bleached kraft softwood pulp board, bleached chemical thermomechanical softwood pulp board, bleached chemical thermomechanical hardwood pulp board pulp board, and the dried chemically bleached broadleaf fresh pulp from the pulper and pulping line respectively After slag removal, refiner beating, screening, and then mixed in the mixing tank, they enter the surface layer headbox, core layer headbox and bottom layer headbox of the laminated paper machine respectively, and pass through the...

Embodiment 2

[0059] The production process and processing parameters of this implementation are the same as those of Example 1, except that the slurry proportions of the bottom paper layer, core paper layer and face paper layer are different.

[0060] The weight of the face paper layer is 52g / m 2 , using 65wt% undried chemically bleached broadleaf fresh pulp and 35wt% bleached kraft softwood pulp board; the weight of the core paper layer is 256g / m 2 , using 60wt% bleached chemical thermomechanical softwood pulp board and 40wt% bleached chemical thermomechanical hardwood pulp board; the basis weight of the bottom paper layer is 42g / m 2 , using 85wt% undried chemically bleached hardwood fresh pulp and 15wt% bleached kraft softwood pulp board.

[0061] The physical properties of the ultra-high bulk packaging cardboard obtained in Example 2 were tested, and the test results are shown in Table 1.

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Abstract

The invention provides a packaging cardboard, which comprises a bottom paper layer, a core paper layer, a surface paper layer and a coating which are stacked in sequence, and the bottom paper layer is composed of 5wt%-30wt% bleached kraft pulp and 70wt%- 95wt% undried chemical broadleaf fresh pulp is prepared; the core paper layer is prepared from 15wt%-45wt% bleached chemical thermomechanical hardwood pulp and 55wt%-85wt% bleached chemical thermomechanical softwood pulp; The face paper layer is prepared from 15wt%-60wt% bleached kraft pulp and 40wt%-85wt% undried chemical broadleaf fresh pulp. The invention adds bleached chemical thermomechanical pulp to the core paper layer to increase the bulk and stiffness of the cardboard; adds undried chemical broadleaf fresh pulp to the paper pulp of the bottom paper layer and the surface paper layer, and utilizes the undried fresh pulp. High strength, high stiffness and high fiber bonding strength finally increase the stiffness and strength of packaging paperboard.

Description

technical field [0001] The invention relates to the technical field of paper packaging, in particular to a packaging cardboard and a preparation method thereof. Background technique [0002] With the progress of society, the concepts of environmental protection and sustainable development are deeply rooted in the hearts of the people. At present, in the selection of wine box packaging materials, paper containers have the advantages of recyclability, easy degradation and low resource consumption, which are in line with the mainstream of green and environmental protection, and occupy the main position of wine box packaging materials; while leather, wood, plastic And the proportion of packaging materials such as metal is decreasing. [0003] In paper wine box packaging, different processes are used according to low, medium and high-grade classification. Low-grade wine packaging cartons generally use more than 350 grams of white cardboard to print and cover (plastic film), die...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/06D21H11/08D21H27/30B32B29/00
CPCD21H11/06B32B29/005B32B2250/26D21H11/08D21H27/30
Inventor 仇如全曾金郎汤惠民张克庆冯跃鹏
Owner ASIA SYMBOL SHANDONG PULP & PAPER