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Special paper for external standard of cup bowl and manufacturing technology thereof

A special paper and external standard technology, applied in the field of paper making, can solve problems such as food safety hazards, low stiffness of gray-bottomed whiteboard paper and low bonding force between paper layers, and inability to meet the requirements for fluorescent substance control of food paper, so as to eliminate safety Hidden dangers, the effect of improving packaging strength

Inactive Publication Date: 2013-05-01
ZHUHAI HUAFENG PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the external standard paper for paper cups, noodles and bowls on the market usually uses gray-bottomed white board paper, which contains fluorescent substances, which cannot meet the requirements for the control of fluorescent substances in food paper, nor can it meet the national standards for food. Regulations that paper cannot use recycled fiber
Therefore, the use of gray-bottomed whiteboard paper as the external standard paper for paper cups, noodles, and bowls is likely to cause hidden dangers to food safety, and the stiffness of gray-bottomed whiteboard paper and the bonding force between paper layers are both low

Method used

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  • Special paper for external standard of cup bowl and manufacturing technology thereof
  • Special paper for external standard of cup bowl and manufacturing technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Take the external standard special paper for cups and bowls with a basis weight of 210 g / m2 as an example.

[0047] Surface layer pulp: 70% bleached hardwood kraft pulp and 30% bleached softwood kraft pulp are proportioned by weight.

[0048] Core layer pulp: 50% bleached chemithermomechanical pulp, 25% bleached softwood kraft pulp, and 25% broke paper by weight.

[0049] The bleached chemithermomechanical pulp is disintegrated, mixed, disc-refined and beaten;

[0050] The bleached softwood kraft pulp is disintegrated, mixed, disc-milled and beaten;

[0051] The broken paper is disintegrated, mixed, disc-refined and pulped;

[0052] Then, the bleached chemithermomechanical pulp, the bleached softwood kraft pulp, and the broke pulp are mixed, and then enter the headbox of the paper machine for filtration.

[0053] Bottom layer pulp: 90% bleached hardwood kraft pulp and 10% bleached softwood kraft pulp by weight are proportioned.

[0054]Then, it is pressed by a paper...

Embodiment 2

[0058] Take the external standard special paper for cups and bowls with a basis weight of 250 g / m2 as an example.

[0059] The production process of this embodiment is the same as that of the above-mentioned first embodiment, and the difference lies in: the slurry ratio of the surface layer slurry, the core layer slurry, and the bottom layer slurry.

[0060] In this embodiment, the surface layer pulp: 80% bleached hardwood kraft pulp and 20% bleached softwood kraft pulp by weight are proportioned.

[0061] Core layer pulp: 52% bleached chemithermomechanical pulp, 16% bleached softwood kraft pulp, and 32% broke paper by weight.

[0062] Bottom pulp: 80% bleached hardwood kraft pulp and 20% bleached softwood kraft pulp by weight.

[0063] The performance indicators of the gray-backed whiteboard paper with a basis weight of 250 g / square meter on the market and the special paper for cups and bowls with a basis weight of 250 g / square meter described in this example are as follows:...

Embodiment 3

[0066] Take the external standard special paper for cups and bowls with a basis weight of 350 g / m2 as an example.

[0067] The production process of this embodiment is the same as the above-mentioned first and second embodiments, the difference lies in: the slurry ratio of the surface layer slurry, the core layer slurry, and the bottom layer slurry.

[0068] In this embodiment, the surface layer pulp: 90% bleached hardwood kraft pulp and 10% bleached softwood kraft pulp by weight percentage.

[0069] Core layer pulp: 55% bleached chemithermomechanical pulp, 5% bleached softwood kraft pulp, and 40% broke paper by weight.

[0070] Bottom pulp: 70% bleached hardwood kraft pulp and 30% bleached softwood kraft pulp by weight.

[0071] The performance indicators of the gray-backed whiteboard paper with a basis weight of 350 g / square meter on the market and the external standard special paper for cups and bowls with a basis weight of 350 g / square meter described in this example are ...

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Abstract

The invention provides a piece of special paper for external standard of a cup bowl. The special paper comprises ground paper and a coating layer, wherein the ground paper comprises a surface layer, a core layer and a bottom layer which are sequentially stacked; the coating layer consists of a surface coating, a core coating and a pre-coating which are sequentially stacked; the pre-coating is coated on the surface layer; the surface layer consists of LBKP (Leaves Bleached Kraft Pulp) and NBKP (Needle Bleached Kraft Pulp); the core layer consists of BCTMP (Bleached Chemi Thermo Mechanical Pulp), NBKP and broke; and the bottom layer consists of LBKP and NBKP. According to the invention, phosphor-free protogenetic pulp (chemical pulp and chemi-mechanical pulp) is adopted to manufacture the special paper for external standard of the cup bowl, so that potential safety hazards caused by poisonous substances to food safety are avoided; and meanwhile, the BCTMP with better bulk is used in the core layer to increase the stiffness of the paper and the binding force between the paper layers, so that the packaging strength is improved.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a special paper for external standard of cups and bowls with no fluorescent substance and good printing performance and a production process thereof. Background technique [0002] At present, the external label paper for paper cups, noodles and bowls on the market usually uses gray-backed whiteboard paper. The gray-backed whiteboard paper contains fluorescent substances, which cannot meet the control requirements of food paper for fluorescent substances, nor can it meet the national standards for food use. Paper cannot use recycled fiber regulations. Therefore, the use of gray-backed whiteboard paper as the external label paper for cups, noodles and bowls is likely to cause hidden dangers to food safety, and the stiffness of the gray-backed whiteboard paper and the bonding force between the paper layers are low. SUMMARY OF THE INVENTION [0003] One of the objectives of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/30D21H19/82B32B29/06
Inventor 季向东仇如全徐海东孙世琼刘智维
Owner ZHUHAI HUAFENG PAPER
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