Anti-counterfeit coating white cardboard containing dyed wood pulp fibers and production process thereof

A wood pulp fiber and production process technology, applied in the field of anti-counterfeiting coated white cardboard and its production technology, can solve the problems of huge investment, inconvenience, and impact on the application in the field of anti-counterfeiting packaging for anti-counterfeiting coated cardboard, and achieve good economic benefits and Environmental benefits, simple preparation process, and the effect of increasing the difficulty of imitation

Inactive Publication Date: 2015-05-20
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 investment in the production equipment of anti-counterfeiting coated cardboard is huge, and it is difficult for counterfeiters to achieve the purpose of imitation
One of the methods is to prepare pulp containing embedded materials, that is, mixed with colored fibers, and then make anti-counterfeiting paper through papermaking. There are clearly visible colored fiber filaments on the surface of the paper web. There are colored fiber filaments distributed on the surface, which is difficult for high-grade printing, which affects its application in the field of anti-counterfeiting packaging; at the same time, most of the dyed fibers used are dyed wool or chemical fibers made of organic polymer materials, which are expensive and difficult to degrade. Waste paper recycling brings trouble and is not conducive to environmental protection
[0004] At present, there is also a kind of anti-counterfeiting coated white cardboard, which has a multi-layer structure composed of white paper layer and colored fiber layer. Colored fibers are distributed on the colored fiber layer, and the colored fiber layer is on the bottom layer or core layer, although the color cannot be seen on the surface. Fiber, does not affect high-grade printing, but the length of colored fiber is limited to 0.5~5mm, so it needs to be cut and sorted before using colored fiber, which requires more processes, and the waste paper mixed with colored fiber needs to be recycled separately. inconvenient

Method used

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  • Anti-counterfeit coating white cardboard containing dyed wood pulp fibers and production process thereof
  • Anti-counterfeit coating white cardboard containing dyed wood pulp fibers and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] according to figure 1 In the steps shown, add water to disintegrate the air-dried bleached softwood kraft pulp according to the concentration of 3wt%, then add anionic direct violet dye according to 4wt% of the air-dried pulp, stir for 5min, let stand for 1min, and finally dehydrate for 10min to obtain Dyed wood pulp fibers; according to figure 2 In the steps shown, the pulp of the surface layer (percentage by weight: 70% of bleached hardwood kraft pulp, 30% of bleached softwood kraft pulp), the pulp of the core layer (percentage by weight: 50% of bleached hardwood kraft pulp %, 9.3% bleached softwood kraft pulp, 40% broken paper, 0.7% dyed wood pulp fiber) and bottom layer pulp (weight percentage: 90% bleached hardwood kraft pulp, 10% bleached softwood kraft pulp) Respectively go through pulper disintegration and mixing, screening, disk refiner refining, pulp mixing, and paper machine for papermaking; the surface layer slurry, core layer slurry and bottom layer slurr...

Embodiment 2

[0035] Add water to disintegrate the air-dried bleached softwood kraft pulp according to the concentration of 4wt%, then add anionic direct violet dye according to 4wt% of the air-dried pulp, stir for 5 minutes, then let it stand for 1 minute, and finally dehydrate for 10 minutes to obtain dyed wood pulp fibers; The pulp of the surface layer (percentage by weight: 70% of bleached hardwood kraft pulp, 30% of bleached softwood kraft pulp), the pulp of the core layer (percentage by weight: 55% of bleached hardwood kraft pulp, 55% of bleached softwood kraft pulp, Kraft pulp 20.1%, broken paper 24%, dyed wood pulp fiber 0.9%) and the bottom layer pulp (weight percentage: bleached hardwood kraft pulp 90%, bleached softwood kraft pulp 10%) respectively pass through the pulper Disintegration and mixing, screening, disc refiner refining, pulp blending, and sending to paper machine for papermaking; the pulp of the surface layer, the pulp of the core layer and the pulp of the bottom layer...

Embodiment 3

[0038] Add water to disintegrate the air-dried bleached softwood kraft pulp according to the concentration of 3wt%, then add anionic direct blue dye according to 3wt% of the air-dried pulp, stir for 5 minutes, let stand for 1 minute, and finally obtain dyed wood pulp fibers after dehydration for 10 minutes; The pulp of the surface layer (percentage by weight: 90% of bleached hardwood kraft pulp, 10% of bleached softwood kraft pulp), the pulp of the core layer (percentage by weight: 55% of bleached chemical thermomechanical pulp, bleached softwood kraft pulp 4.3% kraft pulp, 40% broken paper, 0.7% dyed wood pulp fiber) and the bottom layer pulp (weight percentage: bleached hardwood kraft pulp 70%, bleached softwood kraft pulp 30%) respectively through the pulper Disintegration and mixing, screening, disc refiner refining, pulp blending, and sending to paper machine for papermaking; the pulp of the surface layer, the pulp of the core layer and the pulp of the bottom layer are fil...

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Abstract

The invention discloses an anti-counterfeit coating white cardboard containing dyed wood pulp fibers. The cardboard comprises a surface layer, a core layer and a bottom layer which are overlapped sequentially, wherein dyed wood pulp fibers are contained in the core layer and/or bottom layer in a content of 0.7-0.9wt%. The invention further discloses a process for producing the dyed wood pulp fibers and the anti-counterfeit coating white cardboard containing the dyed wood pulp fibers. According to the process, wood pulp fibers are dyed with dye, and the dyed wood pulp fibers are added in the core layer and/or bottom layer of the coating white cardboard to obtain the anti-counterfeit coating white cardboard, and the dyed fibers are easily identified. Compared with common dyed fibers, the dyed wood pulp fibers are simple in preparation flow, low in price and good in environment-friendly performance, have the characteristics of original fibers, and are soft and plastic. The prepared coating white cardboard achieves a higher level in the fields of paper strength, printability and flexible performance in comparison with existing high-grade coating white cardboard.

Description

technical field [0001] The invention relates to an anti-counterfeit coated white cardboard, in particular to an anti-counterfeit coated white cardboard containing dyed wood pulp fibers and a production process thereof. Background technique [0002] The anti-counterfeiting of general wrapping paper has barcode anti-counterfeiting, printing anti-counterfeiting and other technologies, but with the development of various new technologies, such as high-precision scanning and printing, computer graphics processing technology, digital printing technology, etc., the original anti-counterfeiting measures are very difficult prone to failure. [0003] Starting anti-counterfeiting on the original paper base material is a measure that greatly increases the cost of imitation. The investment in the production equipment of anti-counterfeiting coated cardboard is huge, and it is difficult for counterfeiters to achieve the purpose of imitation. One of the methods is to prepare pulp contain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H15/10D21H21/28D21F11/00
Inventor 季向东吴义荣颜凌燕张东生杨丽管鸣
Owner ZHUHAI S E Z HONGTA RENHENG PAPER
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