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A kind of high stiffness liquid wrapping paper and its production process

A packaging paper and liquid technology, applied in the field of papermaking, can solve the problems of paper-based beverage transportation, inconvenient storage, increased wood pulp and chemical consumption, and increased production costs, etc., to achieve good packaging molding effects, fast drying speed, The effect of improving air permeability

Active Publication Date: 2016-10-05
ZHUHAI S E Z HONGTA RENHENG PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The white cardboard for liquid packaging currently on the market is easily deformed after the packaging is formed and filled with liquids such as milk and juice, which causes inconvenience to the transportation and storage of paper-filled beverages
In order to improve the strength of the packaging box, the stiffness of the paper can only be increased by increasing the total weight of the liquid packaging white cardboard, which will increase the consumption of wood pulp and chemicals, and greatly increase the production cost

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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  • A kind of high stiffness liquid wrapping paper and its production process
  • A kind of high stiffness liquid wrapping paper and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The surface layer is made of bleached chemical wood pulp, the core layer is made of unbleached unbleached virgin wood pulp, and the bottom layer is made of unbleached unbleached virgin wood pulp, which are respectively crushed and mixed by a pulper, screened, and beaten by a refiner. Surface layer headbox, core layer headbox and bottom layer headbox of laminated wire forming paper machine.

[0051] Then, through the surface wire making, core wire making, and bottom wire making of the paper machine, and then composited, paper with a three-layer structure of surface layer, core layer, and bottom layer is produced; the surface layer, core layer, and bottom three-layer forming wire The pulp net speed ratios are: 0.966, 0.927, 0.907.

[0052] Enter the press section of the paper machine and go through four presses; the pressure of the first press is 85kN / m; the pressure of the second press is 90kN / m; the pressure of the third press is 650kN / m; The pressure of road pressing ...

Embodiment 2

[0062] The manufacturing process and processing parameters of this embodiment are the same as those of the first embodiment above, except for the quantitative distribution of the surface layer, core layer, bottom layer, and coating layer.

[0063] In the finished paper: the basis weight of the surface layer accounts for 25% of the total basis weight of the liquid wrapping paper, i.e. 52.2 g / m2; square meters; the basis weight of the bottom layer 103 accounts for 15% of the total weight of the liquid wrapping paper, that is, 31.5 g / m2; The proportion of the total basis weight is 10%, that is, 21.0 g / m2.

[0064] The produced liquid packaging paper is compared with the ordinary liquid packaging white cardboard with a quantitative basis of 210 g / m2 on the market and the liquid packaging white cardboard with a quantitative basis of 210 g / m2 in the national standard. In terms of physical properties, it is better than the ordinary white cardboard for liquid packaging with a basis w...

Embodiment 3

[0068] The production process of this embodiment is the same as that of the above-mentioned embodiment one, and the difference is: the quantification of surface layer, core layer, bottom layer, and coating layer, the proportioning number of top coat and precoat paint, and the Pulp net speed ratio, pressing pressure, belt calendering pressure.

[0069] The pulp-to-wire speed ratios of the surface layer, core layer, and bottom three-layer forming wire are: 0.977, 0.95 1, and 0.929, respectively.

[0070] The pressure of the first press is: 93kN / m; the pressure of the second press is adjusted to: 105kN / m; the pressure of the third press is adjusted to: 685kN / m; the pressure of the fourth press is adjusted to: 40kN / m .

[0071] The belt calendering pressure was 25 kN / m.

[0072] The components and proportioning parts by weight of the paint used for the top coat and the pre-coat are respectively: 50 parts of calcium carbonate, 50 parts of peeling soil, 15 parts of SA latex, 0.35 ...

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 provides liquid packing paper with high stiffness, which comprises base paper and a coating layer, wherein base paper comprises a surface course, a sandwich layer and a bottom layer which are stacked sequentially; the definite quantity of the surface course accounts for 20 to 40 percent of the total definite quantity of the liquid packing paper; the definite quantity of the sandwich layer accounts for 30 to 55 percent of the total definite quantity of the liquid packing paper; the definite quantity of the bottom layer accounts for 10 to 25 percent of the total definite quantity of the liquid packing paper; the definite quantity of the coating layer accounts for 8 to 18 percent of the total definite quantity of the liquid packing paper; the coating layer comprises a surface coating, a pre-coating and a back coating; the surface coating is coated on the pre-coating; the pre-coating is coated on the surface course; and the back coating is coated on the bottom surface of the bottom layer. The liquid packing paper disclosed by the invention achieves high stiffness and good packing forming effect. A liquid packing box that is manufactured by a liquid packing paperboard with high stiffness is not easy to deform, and corners of the packing box are not easy to sink.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a liquid wrapping paper with high stiffness under the same quantitative conditions and a production process thereof. Background technique [0002] Liquid packaging paper refers to the coated cardboard used to package liquid beverages such as milk and juice after printing and coating processing. Coated cardboard refers to paper with a weight greater than 170 grams per square meter. Coated cardboard is composed of a coating layer and a base paper. The coating layer generally has 2-4 layers, and the base paper generally has 3-5 layers. [0003] The liquid packaging paper produced in China is usually coated white cardboard. The surface layer, core layer and bottom layer of the base paper of coated white cardboard are generally made of bleached chemical wood pulp, and the liquid packaging white cardboard made is white. Liquid packaging white cardboard. The white cardboard for li...

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 Patents(China)
IPC IPC(8): D21H27/30D21H19/82D21H19/84D21H19/38D21H19/40D21H19/58D21H21/06B32B29/00
Inventor 季向东仇如全张东生刘海滨闫淑银
Owner ZHUHAI S E Z HONGTA RENHENG PAPER