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Double-wavelength fluorescent falsification-preventing hand-made paper and production method thereof

A production method and dual-wavelength technology, applied in the field of anti-counterfeiting, can solve the problems of destroying the stability of the handmade paper making system, unable to maintain the original production process of traditional handmade paper, etc., and achieve excellent compatibility, strong anti-counterfeiting effect, and strong anti-counterfeiting effect. Effect

Inactive Publication Date: 2018-10-26
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach destroys the stability of the handmade paper making system and cannot maintain the original production process of traditional handmade paper

Method used

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  • Double-wavelength fluorescent falsification-preventing hand-made paper and production method thereof
  • Double-wavelength fluorescent falsification-preventing hand-made paper and production method thereof
  • Double-wavelength fluorescent falsification-preventing hand-made paper and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Select UV short-wave fluorescent nanomaterials: Y 2 o 3 : Eu 3+ , infrared upconversion fluorescent nanomaterials: NaYF 4 : Yb 3+ ,Er 3+ , the mass ratio of the two to the cellulose pulp board is 1:10, and the fluorescent regenerated cellulose fibers are prepared through the cellulose dissolution and regeneration process, and the fibers are cut to 3mm. 0.5 g of the fluorescent fiber was weighed, immersed in a 3.0 wt % sodium hydroxide aqueous solution for 15 minutes, and then subjected to ultrasonication for 5 minutes to obtain fibrillated fluorescent regenerated cellulose fibers. Mix the obtained fluorescent fiber with handmade pulp (bamboo pulp and hemp pulp with a mass ratio of 2:8), and make the beating degree reach 42°SR under the condition of beating concentration of 4.0%, followed by paper fishing, pressing, and baking , Uncovering the paper process to obtain dual-wavelength fluorescent anti-counterfeiting handmade paper. Two-wavelength fluorescent anti-cou...

Embodiment 2

[0029] Selection of UV long-wave fluorescent nanomaterials: BaMgAl 10 o 17 : Eu 2+ ,Mn 2+ , infrared upconversion fluorescent nanomaterials: NaYF 4 :Yb 3+ ,Er 3+ , the mass ratio of the two to the cellulose pulp board is 1:20, and the fluorescent regenerated cellulose fibers are prepared through the cellulose dissolution and regeneration process, and the fibers are cut to 10 mm. Weigh 0.1 g of the fluorescent fiber, immerse in 5wt% sodium hydroxide aqueous solution for 25 minutes, and then apply ultrasound for 1 minute to obtain fibrillated fluorescent regenerated cellulose fibers. Mix the obtained fluorescent fiber with handmade pulp (hemp pulp and straw pulp with a mass ratio of 5:5), and make the beating degree reach 45°SR under the condition of beating concentration of 2.0%, and then carry out paper fishing, pressing, and baking , Uncovering the paper process to obtain dual-wavelength fluorescent anti-counterfeiting handmade paper.

Embodiment 3

[0031] Select UV short-wave fluorescent nanomaterials: Y 2 o 3 : Eu 3+ , UV long-wave fluorescent nanomaterials: BaMgAl 10 o 17 : Eu 2+ ,Mn 2+ , the mass ratio of the two to the cellulose pulp board is 1:5, the fluorescent regenerated cellulose fibers are prepared through the cellulose dissolution and regeneration process, and the fibers are cut to 0.2 mm. Weigh 0.2 g of the fluorescent fiber, immerse it in 1 wt % sodium hydroxide aqueous solution for 5 minutes, and then apply ultrasound for 10 minutes to obtain fibrillated fluorescent regenerated cellulose fibers. Mix the obtained fluorescent fiber with handmade pulp (husk pulp and bamboo pulp with a mass ratio of 3:7), and make the beating degree reach 40°SR under the condition of a beating concentration of 7.0%, and then carry out paper fishing, pressing, and baking , Uncovering the paper process to obtain dual-wavelength fluorescent anti-counterfeiting handmade paper.

[0032] The double-wavelength fluorescent anti-...

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Abstract

The invention belongs to the technical field of falsification preventing, and particularly relates to double-wavelength fluorescent falsification-preventing hand-made paper and a production method thereof. Double-wavelength fluorescent falsification-preventing regenerated cellulosic fibers are subjected to fibrillation to generate ultra-fine fibers, then, the ultra-fine fibers are mixed with hand-made paper pulp fibers, and the ultra-fine fibers and the hand-made paper pulp fibers are pulped jointly to make the double-wavelength fluorescent falsification-preventing hand-made paper. Compared with a single-fluorescent falsification-preventing technology, the double-wavelength fluorescent falsification-preventing hand-made paper has the characteristics that the falsification-preventing effectof a double-fluorescent technology is higher, and the double-wavelength fluorescent falsification-preventing hand-made paper cannot be copied easily; and compared with polypropylene and polyester fibers, the regenerated cellulosic fibers and paper fibers have quite excellent compatibility, the specific surface area can be increased by fibrillation and pulp beating treatment, more hydroxyls are exposed, the regenerated cellulosic fibers can be combined to the pulp fibers well through hydrogen bonds, and additional auxiliary agents are not required. The falsification-preventing hand-made paperis high in falsification-preventing effect, simple in production process and good in operability.

Description

technical field [0001] The invention belongs to the technical field of anti-counterfeiting, and in particular relates to a dual-wavelength fluorescent anti-counterfeiting handmade paper and a production method thereof. Background technique [0002] With the strengthening of people's awareness of property rights protection and brand, anti-counterfeiting technology plays an increasingly important role in the fields of documents, currency and national security. There are many types of anti-counterfeiting paper, including watermark anti-counterfeiting paper, sandwiched anti-counterfeiting paper, colored fiber anti-counterfeiting paper, fluorescent color fiber anti-counterfeiting paper and so on. The anti-counterfeiting technology used in these papers is to form anti-counterfeiting watermarks with different light and shade locally through the paper fibers, or to entrain security threads in the paper, or to achieve the purpose of anti-counterfeiting by adding colored or fluorescen...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21F13/02D21H15/10D21H13/08
CPCD21F13/02D21H13/08D21H15/10D21H27/00
Inventor 刘鹏唐颐张慧慧于敏敏闫玥儿王思浓张宏斌余辉徐圆圆李萌
Owner FUDAN UNIV
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