Manufacturing method of anti-counterfeiting paper

Abstract

The invention relates to the field of anti-counterfeit paper making methods, in particular to an anti-counterfeit paper making method. The anti-counterfeit paper making method comprises the following steps that a surface net is made, a lining net is made, and concave patterns of the surface net are fit with hollow-out patterns on the lining net, so that the patterns on the surface net correspond to the patterns on the lining net; the surface net and the lining net are compounded and fixed to form a watermarking net; the watermarking net is tensioned on a net cage, the net cage is put in a net groove of a papermaking machine, and anti-counterfeit paper is obtained through paper manufacture with pulp; a metal net is a stainless steel net. The speed of size filtration water produces obvious difference by compounding the surface net and the lining net, and further the clarity of watermarked paper is improved due to the different size fiber accumulation heights; watermarking patterns can show a 3D effect, have better stereo perception and facilitate recognition and counterfeit prevention through mutual matching between convex-concave degree adjustment of the surface net and increase or decrease of the layer number of the lining net. Net holes formed in the surface net and the lining net are diamond net holes, further a fiber arrangement mode is changed, and the transverse stretching resistance of paper is strengthened.

Description

technical field [0001] The invention relates to the field of manufacturing methods of anti-counterfeiting paper, in particular to the manufacturing method of anti-counterfeiting paper. Background technique [0002] In the existing field of paper anti-counterfeiting technology, watermark is the most commonly used anti-counterfeiting method, because it is easy to identify and difficult to forge, and it has been used for decades. However, with the improvement of counterfeiting technology, various watermarks are facing severe tests. The use of watermarks on paper not only has anti-counterfeiting effects, but also has aesthetic effects. The traditional watermarking technology is divided into black watermarks and white watermarks. Due to technical reasons and other reasons, copper mesh is mostly used as the material. Because copper mesh has the advantages of good ductility, easy processing and molding, and simple welding process, it is widely used in the industry, but the use of c...

AI Technical Summary

Problems solved by technology

Due to technical reasons and other reasons, copper mesh is mostly used as the material. Because copper mesh has the advantages of good ductility, easy processing and molding, and simple welding process, it is widely used in the industry, but the use of copper mesh also has the following disadvantages: due to material reasons The pattern of the copper mesh is poorly shaped, and the pattern is deformed by the rollers of the paper machine, resulting in unclear watermarks on the paper; the corrosion resistance of the copper mesh is poor, and the service life is short, resulting in frequent shutdowns and high consumption of the paper machine; the traditional watermark copper mesh is due to the production cycle. Long-term cost is high, which is not conducive to product promotion

[0003] At present, there are two common ways of processing household paper patterns: one is to press the paper with embossing rollers to achieve the pattern on the paper towel. This method has the following disadvantages: damage to the paper fiber and reduce the strength of the paper; it is easy to cause the paper towel to lose powder The phenomenon affects the quality of paper towels; with the maturity of large-scale wide-width paper machines, it is difficult for large-scale wide-width embossing rollers to meet the needs of the existing market for a while; the other is to use ink printing to print paper towels with colorful patterns. The dyes used in this production form may contain chemical raw materials such as lead and pigments. For example, people with sensitive skin who use color-printed paper towels will cause skin allergies. If used for a long time, it may cause poisoning

Images