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Colour-changeable fiber anticounterfeit paper

An anti-counterfeiting paper and fiber technology, applied in the field of anti-counterfeiting paper, can solve the problems of easy confusion, single anti-counterfeiting characteristics, and restricting color fiber anti-counterfeiting paper.

Inactive Publication Date: 2005-12-21
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are still several weaknesses in these existing colored fiber anti-counterfeiting papers: one is that the colored fibers added therein are made of cotton, hemp, silk, wool or polyester fibers, and these raw materials are widely available and easy to be used. Second, the above-mentioned various fibers are all short and single short filaments, lacking their own special characteristics. The colored fiber anti-counterfeiting paper made of them is similar in appearance and easy to be confused; third, the anti-counterfeiting characteristics are single, only It has an intuitive first-line anti-counterfeiting function, and lacks more difficult-to-imitate second-line anti-counterfeiting traits
The existence of these weaknesses limits the wider application of colored fiber anti-counterfeiting paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: The anti-counterfeiting paper contains green algae fiber, and the content of the algae fiber in the paper is 0.1%.

[0021] 1. Preparation of variable color fiber

[0022] (1) Raw materials: The used raw materials for the manufacture of the variable-color fiber are branched filamentous green algae--Cladophyllum, and other branched filamentous green algae can also be used under the premise that the output can be guaranteed.

[0023] (2) Raw material preparation: collect the raw material Cladophora in the water body, cut it short after cleaning and removing silt and sundries, and change the raw material into short filaments of algal silk fibers with a length of 2 mm. In the production, the common processing equipment for processing waste paper-hydraulic pulper can be used, so as to clean the algal filaments and remove sediment during the pulping process. In order to improve the cleaning effect, the slurry concentration is 1.5%. The aperture of the sieve pl...

Embodiment 2

[0036] Example 2: Contain red algae silk fibers in the anti-counterfeiting paper, and the content of the algae silk fibers in the paper is 0.8%.

[0037] 1. Preparation of variable color fiber

[0038] (1) raw material: same as embodiment 1.

[0039] (2) material preparation: same as embodiment 1.

[0040] (3) pickling: with embodiment 1

[0041] (4) Dyeing: When dyeing a color other than cyan or green, first bleach the algae fibers and then dye them. Bleaching: put the algae fibers into 0.5-2% hydrogen peroxide bleaching solution, in the slurry The fiber concentration is 10-15%, the solution temperature is controlled at 40-60°C, soaked for 2-3 hours, with SO 2 Take out after neutralization.

[0042] Dyeing: first prepare the dye solution: direct light-fast scarlet 4B 0.5 g / L, Pingpingjia O 0.04 g / L.

[0043] According to the ratio of 50 grams of algae fiber / liter of dyeing solution, immerse the bleached and pretreated algae pulp fiber in the dyeing solution with a dye co...

Embodiment 3

[0050] Embodiment 3: The anti-counterfeiting paper contains two kinds of green and red algae filament fibers, and the content of the two algae filament fibers in the paper is 0.2% respectively.

[0051] 1. Preparation of color-changing fiber: the preparation of green algae fiber is the same as in Example 1; the preparation of red algae fiber is the same as in Example 2, omitted.

[0052] Second, the copying of anti-counterfeiting paper

[0053] (1) beating and secondary purification of anti-counterfeiting fiber: same as embodiment 1

[0054] (2) Papermaking process

[0055] The amounts of red and green algae filaments mixed in are 0.2% of the total papermaking slurry. Others are the same as embodiment 1, omitted.

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Abstract

The invention discloses a variable color fiber fake prevention paper that contains filamentary algae material. The algae material production technique includes following steps: 1, select raw material cladophorales; 2, wash raw material, remove dirt and crop the cladophorales; 3, acid wash; dip the cladophorales fiber in thin HCl at room temperature; 4, color and bleach technique is the same as cotton fiber; 5, dehydrate and dry with dehydrator and baker or naturally dry off in the sunshine; 6, paper couching, add the material into wood pulp by 0.1 to 0.2 percent. The product is of more reliable fake prevention performance: 1, color brand tracery; 2, color variable; 3, quasi-watermark effects; 4, special micro objective properties, 5, unique tracery; 6, hard to imitate.

Description

technical field [0001] The invention relates to an anti-counterfeiting paper, in particular to a variable-color fiber anti-counterfeiting paper. Background technique [0002] At present, the anti-counterfeiting papers that have appeared in the market include thermal anti-counterfeiting paper, watermarked secret paper, ultra-ionic media special paper, colored fiber anti-counterfeiting paper, fluorescent fiber paper, textured paper, magnetic anti-counterfeiting paper and so on. Among them, anti-counterfeiting paper containing colored fibers is widely used because of its intuitive and clear anti-counterfeiting features, which can be distinguished by naked eyes, the production process is relatively simple, and the production cost is low, such as banknotes and brand-name cigarette packaging. But there are still several weaknesses in these existing colored fiber anti-counterfeiting papers: one is that the colored fibers added therein are made of cott...

Claims

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Application Information

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IPC IPC(8): D21H15/00
Inventor 华栋
Owner XUZHOU NORMAL UNIVERSITY
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