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Anti-theft safety paper

A technology of safety paper and coated paper, which is applied in the field of preparing the anti-theft safety paper, can solve the problems of the anti-theft safety paper alarm function failure, damage, and the amorphous strip is easy to be found.

Inactive Publication Date: 2016-12-07
BEIJING HENGWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology is to implant a metal strip with a length of 32 mm and a width of 1 mm into the paper. The amorphous strip is easy to be found and then destroyed, making the alarm function of this anti-theft security paper invalid.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Preparation of Amorphous Bare Fibers by Internal Cylindrical Water Spinning

[0073] Refer to the attached figure 1 , introduces the preparation method of the amorphous bare fiber of the present invention.

[0074] First, a Co-based master alloy rod is provided. The alloy rod has a melting point of 970° C., a diameter of 7 mm, and a composition of Co71.8Fe4.9Nb0.8Si7.5B15.

[0075] Add cooling water into the high-speed rotating drum with a speed of 150 m / s, so that the cooling water rotates synchronously on the inner wall of the drum;

[0076] Put the master alloy into the nozzle, melt the master alloy by induction heating, and heat it to 1200 degrees;

[0077] The nozzle is filled with high-pressure gas, and the molten master alloy is sprayed into water for rapid solidification to prepare amorphous bare fibers.

[0078] The continuous amorphous bare fiber filaments prepared in Example 1 have a diameter of 100±3 microns.

[0079] The obtained amorphous bare fiber fi...

Embodiment 2

[0081] Papers with different amorphous fiber contents are prepared by directly implanting the bare amorphous fibers prepared in Example 1 into the paper, wherein the total length distribution of the bare amorphous fibers in the paper is 0.3m / A4 paper, 0.4m m / A4 paper, 0.60m / A4 paper, 0.8m / A4 paper, 1.2m / A4 paper. The prepared paper containing amorphous fibers is tested, and the results are as follows (wherein each result is a statistical result obtained by repeated detection of 1000 sheets of paper, and the detection rate refers to when the paper is put into the detection area of ​​the detection instrument, the detection instrument alarms times):

[0082]

[0083]

[0084] It can be seen from the above results that the bare amorphous fiber prepared in Example 1 has a large Barkhausen effect. When the length of the amorphous bare fiber is less than or equal to 1mm, the detection rate of the instrument for this anti-theft security paper is lower than 43%. However, when th...

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Abstract

The invention relates to anti-theft safety paper and a method for preparing the anti-theft safety paper, and provides the anti-theft safety paper. Non-crystal fibers having a big barkhausen effect are planted in the anti-theft safety paper, wherein the diameter of the non-crystal fibers is 80-200 microns, preferably 100-150 microns; and the length of the non-crystal fibers is 2-10mm.

Description

technical field [0001] The present application relates to an anti-theft security paper and a method for preparing the anti-theft security paper. Background technique [0002] As a resource, information is of special significance to human beings due to its universality, sharing, value-added, processability and multi-utility. According to the definition of the International Organization for Standardization, the meaning of information security mainly refers to the integrity, availability, confidentiality and reliability of information. The fundamental purpose of protecting information security is to protect internal information from internal, external, natural and other threats. Information security is an issue that any country must attach great importance to, and it is a national security strategy that cannot be ignored. Hostile forces or illegal organizations use various means to steal political, military, economic, scientific and technological secret information, and how th...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H21/14
Inventor 王诚陈征
Owner BEIJING HENGWEI TECH CO LTD
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