A kind of plastic base material for making security documents and preparation method thereof

A technology for plastic substrates and security documents, applied in the field of plastic substrates, can solve the problems of poor tolerance, difficult to realize windows, insufficient anti-counterfeiting ability, etc., and achieve the effect of high anti-counterfeiting level and effective anti-counterfeiting technology

Active Publication Date: 2018-05-22
CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The window formed by the combination of paper and plastic film is difficult to realize, the effect is not good after realization, the structure is unstable, and the resistance is poor, so it has not been widely used.
[0006] In order to solve the problems that the see-through window on the existing plastic base material for printing valuable securities is easy to be copied, the anti-counterfeiting ability is insufficient, the production cost of the window paper is high, the structure is unstable, and the tolerance is poor, the present invention provides a strong anti-counterfeiting Capable plastic substrate and method for its manufacture

Method used

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  • A kind of plastic base material for making security documents and preparation method thereof
  • A kind of plastic base material for making security documents and preparation method thereof
  • A kind of plastic base material for making security documents and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Step 1, 5% (mass percentage, the same below) of titanium dioxide (purchased from DuPont, model R104), 50% of calcium carbonate (purchased from Guangzhou Jialiang, 2000 mesh), 10% of maleic anhydride graft poly Propylene (purchased from Nanjing Sutai, ST-5), 35% terpolymerized polypropylene (copolymerized PP, terpolymer of propylene, ethylene, 1-butene, melting point 137 ° C, purchased from Basel Corporation, Model Adsyl3C30FHP) is uniformly mixed by a high-speed kneader, then granulated by twin-screw extrusion, melt extrusion casting, longitudinal stretching, and corona to make a film a with a thickness of 35 microns.

[0051] Step 2, the film a in step 1 and the purchased 48 micron thick double-sided heat-sealed polypropylene film b (BOPP heat-sealed film, purchased from Shanghai Huyuan Packaging Factory with a melting point of about 173°C) at 140±5°C Heat-compression compounding, heat-press film a on the upper and lower sides of film b respectively, and make a composi...

Embodiment 2

[0054] Step 1, the raw materials used are the same as in Example 1, and the formula is: titanium dioxide 5% (mass percentage, the same below), calcium carbonate 50%, maleic anhydride grafted polypropylene 15%, terpolymerized polypropylene 30%, After being uniformly mixed by a high-speed kneader, a film a with a thickness of 35 microns is made by twin-screw extrusion granulation, melt extrusion casting, longitudinal stretching, and corona.

[0055] Step 2, paste the film a in step 1 on the purchased 35 micron thick two-way stretch film with an adhesive (solvent-free reactive adhesive, purchased from Shanghai Kangda Chemical New Material Co., Ltd., model WD8158A / B). Stretch the upper and lower sides of polyethylene terephthalate (BOPET, purchased from DuPont) film b to make a composite film a-c-b-c-a with a thickness of 111 microns, where c is the adhesive layer, and the two adhesive layers c are both 3 microns thick,

[0056] In step 3, the composite film a-c-b-c-a in step 2 i...

Embodiment 3

[0058] Step 1, 4% (mass percentage, the same below) of titanium dioxide (purchased from DuPont, model R104), 96% of copolyamide (melting point 125 ° C, purchased from Shanghai Tianyang Hot Melt Adhesive Co., Ltd., model JCC- 6300), after being uniformly mixed by a high-speed kneader, extruding and granulating by twin-screw, melt extrusion and spinning to make 45 micron thick non-woven fabric a,

[0059] Step 2, pass through the adhesive (the adhesive requires a peel strength of 2N / 15mm, and it only needs to not lose its bond strength when exposed to water. For example, a solvent-free reactive adhesive can be used, purchased from Shanghai Kangda Chemical New Material Co., Ltd. , model WD8158A / B) paste the non-woven fabric a obtained in step 1 on the upper and lower surfaces of the purchased BOPET film (purchased from DuPont, thickness 28 microns) to make a 124 micron thick composite film a-c-b-c-a, where c is glue Adhesive layer, both adhesive layers c are 3 microns thick,

[...

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Abstract

The invention provides a plastic base material for making secure files. The plastic base material comprises a polymer supporting layer; and a polymer molding layer adhered to the surface of the polymer supporting layer, the polymer molding layer is locally deleted to expose the polymer supporting layer, and the surface of the exposed polymer supporting layer is provided with a projecting picture and test to form a perspective window with concave and convex hand feeling. The perspective window which cannot form the concave and convex hand feeling can be copied or printed on a plastic film, so the plastic base material has high anti-counterfeit ability.

Description

technical field [0001] The invention relates to a plastic substrate for making security documents. The plastic substrate is provided with a perspective window, and the patterns on the two surfaces of the perspective window are identical and aligned, and the pattern has a concave-convex feel, and has the effect of preventing copying and printing forgery. Background technique [0002] Plastic substrates have many advantages that paper substrates do not have, such as long service life, waterproof, mothproof, mildewproof, tear resistance, etc. Therefore, after Australia first used plastic substrates to print banknotes and achieved good results, more and more countries use plastic substrates to print banknotes, and the trend of plastic banknotes replacing paper banknotes is becoming more and more obvious. At present, there are mainly two types of plastic substrates used for printing banknotes, one type is coated or printed with an opaque layer on the surface of a biaxially stret...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/20B32B37/06B32B37/10
Inventor 管文唐士立欧阳苏阳韩丽琴刘卫东
Owner CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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