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

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...

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

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