Anti-theft safety paper

A security paper and paper technology are applied in the field of preparing the anti-theft security paper, which can solve the problems of the failure of the alarm function of the anti-theft security paper, the easy discovery and destruction of the amorphous strip, and the like.

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. Th...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0069] Preparation of Amorphous Bare Fibers, Melt Pulling Method

[0070] Refer to the attached figure 1 , introduces the preparation method of the amorphous bare fiber of the present invention.

[0071] First provide a Co-based master alloy rod, the alloy rod has a melting point of 970°C, a diameter of 7mm, and a composition of Co 71.8 Fe 4.9 Nb 0.8 Si 7.5 B 15 .

[0072] Use induction heating to melt the master alloy and heat it to 1200 degrees to form a stable molten pool at the upper end of the master alloy;

[0073] Depend on figure 2 The shown mechanical device feeds the master alloy upward at a speed of 2 mm / s, and at the same time uses the part where the guide device is connected to the master alloy to cool the master alloy to prevent the part other than the top of the master alloy from melting;

[0074] The molten master alloy is cut by a high-speed rotating copper wheel with a tapered edge to obtain an amorphous bare fiber.

[0075] The continuous amorpho...

Embodiment 2

[0078] Papers with different contents of amorphous fibers are prepared by directly implanting the amorphous fibers prepared in Example 1 into the paper, wherein the total length distribution of the amorphous fibers in the paper is 0.5m / A4 paper, 0.75m / A4 paper, 1m / A4 paper, 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):

[0079]

[0080]

[0081] It can be seen from the above results that the glass-coated amorphous fiber prepared in Example 1 has a large Barkhausen effect. In the case where the length of the amorphous fiber is less than or equal to 1 mm, the detection rate of the instrument for this anti-theft security paper is lower than 56%, but when the leng...

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Abstract

The invention relates to anti-theft safety paper. Non-crystal naked fibers having a big barkhausen effect are planted in the anti-theft safety paper, wherein the diameter of the non-crystal naked fibers is 10-50 microns, preferably 20-30 microns; and the length of the non-crystal naked fibers is 2-10mm, or 3-8mm, or 3-5mm.

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 陈征王诚
Owner BEIJING HENGWEI TECH CO LTD
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