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Solid bleached sulphate (SBS) coating white cardboard and process for producing the same

A production process and technology for white cardboard, applied in the field of papermaking, can solve the problems of easy failure of anti-counterfeiting measures, high cost, and inability to popularize and implement, and achieve the effects of improving uniformity and surface performance, improving printability and inking performance.

Inactive Publication Date: 2013-02-13
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

[0002] At present, the anti-counterfeiting technology on packaging paper generally adopts barcode anti-counterfeiting, printing anti-counterfeiting, etc.; but with the development of various new technologies, such as high-precision scanning and printing, computer graphics processing technology, digital printing technology, etc., the anti-counterfeiting technology on packaging paper Anti-counterfeiting measures are easily invalidated and imitated
If the anti-counterfeiting technology is improved by transforming papermaking and printing equipment, the cost is too high to be widely implemented

Method used

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  • Solid bleached sulphate (SBS) coating white cardboard and process for producing the same
  • Solid bleached sulphate (SBS) coating white cardboard and process for producing the same
  • Solid bleached sulphate (SBS) coating white cardboard and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Surface pulp: wood pulp (weight percentage: bleached hardwood kraft pulp 70%, bleached softwood kraft pulp 30%), crushed and mixed by a pulper, refined by a disc refiner, and entered into the surface of the paper machine net filter;

[0035] Core layer pulp: wood pulp (weight percentage: bleached hardwood kraft pulp 50%, bleached softwood kraft pulp 25%, broken paper 25%), crushed and mixed by a pulper, refined by a disc refiner , enter the paper machine core mesh to filter;

[0036] Bottom pulp: wood pulp (weight percentage: 5% natural fiber, 85% bleached hardwood kraft pulp, 10% bleached softwood kraft pulp), crushed and mixed by a pulper, refined by a disc refiner, Enter the paper machine face mesh for filtration;

[0037] Then, through the three-layer web forming of the paper machine, a wet paper sheet with a surface layer 103, a core layer 102 and a bottom layer 101 distributed with natural fibers is produced. After coating and drying, it enters the coiling sect...

Embodiment 2

[0046] The production process of this embodiment is the same as that of the above-mentioned embodiment 1, the difference lies in: the slurry ratio of the surface layer slurry, the core layer slurry, and the bottom layer slurry, and the coating ratio of the pre-coating and core coating.

[0047] Surface pulp (percentage by weight): bleached hardwood kraft pulp 85%, bleached softwood kraft pulp 15%;

[0048] Core layer pulp (weight percentage): bleached hardwood kraft pulp 53%, bleached softwood kraft pulp 17%, broken paper 30%;

[0049] Bottom pulp (weight percent): natural fiber 8%, bleached hardwood kraft pulp 72%, bleached softwood kraft pulp 20%;

[0050] The coating ratio of precoating and core coating is (parts by weight): 100 parts of calcium carbonate, 8 parts of latex, 3 parts of soybean protein, 0.4 parts of carboxymethyl cellulose, 0.09 parts of dispersant, 0.8 parts of water repellent, lubricating 0.3-1.2 parts of antifoaming agent and 0.035 parts of antifoaming ag...

Embodiment 3

[0056] Surface pulp (percentage by weight): bleached hardwood kraft pulp 90%, bleached softwood kraft pulp 10%;

[0057] Core pulp (weight percent): 55% bleached hardwood kraft pulp, 5% bleached softwood kraft pulp, 40% broken paper;

[0058] Bottom pulp (weight percent): natural fiber 10%, bleached hardwood kraft pulp 60%, bleached softwood kraft pulp 30%;

[0059] The coating ratio of pre-coating and core coating is (parts by weight): 100 parts of calcium carbonate, 10 parts of latex, 1.0 parts of soybean protein, 0.6 parts of carboxymethyl cellulose, 0.12 parts of dispersant, 1.0 parts of water-resistant agent, lubricating 1.2 parts of agent, 0.035 parts of defoamer.

[0060] The coating amounts of the precoat layer 104, the core coat layer 105, and the top coat layer 106 were applied at 10 g / m2, 12 g / m2, and 12 g / m2, respectively.

[0061] The produced SBS coated white cardboard is compared with FBB ordinary white cardboard of the same grammage on the market, and its phy...

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Abstract

The invention provides a solid bleached sulphate (SBS) coating white cardboard, which comprises a raw paper and a coating layer, wherein the raw paper comprises a surface layer, a core layer and a bottom layer which are orderly overlaid, the bottom layer is distributed with natural color fibers, the bottom layer comprises, by weight, from 5 to 10% of natural color fibers, and the coating layer is coated on the surface layer. Because the natural color fibers which are distributed on the bottom layer form textures, the SBS coating white cardboard is easy to be distinguished and recognized from common white cardboards. The natural color fibers do not need to be bleached through chemical processing, thereby reducing influences of environment from bleaching chemicals, and being capable of effectively reducing emission load of chemical oxygen demand (COD) when pulping. The SBS coating white cardboard increases flexible performance and bond strength of papers by adopting an SBS fiber structure, and increases binding force between layers, thereby increasing packaging strength.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to an SBS (Solid Bleached Sulphate, fully bleached sulfate pulp) coated white cardboard and a production process thereof. Background technique [0002] At present, the anti-counterfeiting technology on packaging paper generally adopts barcode anti-counterfeiting, printing anti-counterfeiting, etc.; but with the development of various new technologies, such as high-precision scanning and printing, computer graphics processing technology, digital printing technology, etc. Anti-counterfeiting measures can easily fail and be imitated. If the anti-counterfeiting technology is improved by transforming papermaking and printing equipment, the cost will be too high to be widely implemented. Based on the fact that the packaging substrates currently used in the market are generally common coated white cardboard, if we start from the packaging substrates and provide a packaging substrate t...

Claims

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Application Information

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IPC IPC(8): D21H27/30D21H19/82D21H19/38D21H19/50D21H19/52D21H19/58D21H21/08D21H21/12D21H21/06B32B29/00
Inventor 季向东杨玺李赓仇如全
Owner ZHUHAI S E Z HONGTA RENHENG PAPER
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