KR20170053027A - Method for manufacturing security paper containing soft magnetic metal wire and security paper utilizing the same - Google Patents

Method for manufacturing security paper containing soft magnetic metal wire and security paper utilizing the same Download PDF

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KR20170053027A
KR20170053027A KR1020150155274A KR20150155274A KR20170053027A KR 20170053027 A KR20170053027 A KR 20170053027A KR 1020150155274 A KR1020150155274 A KR 1020150155274A KR 20150155274 A KR20150155274 A KR 20150155274A KR 20170053027 A KR20170053027 A KR 20170053027A
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South Korea
Prior art keywords
soft magnetic
magnetic metal
metal wire
detection layer
forming
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KR1020150155274A
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Korean (ko)
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KR101778520B1 (en
Inventor
윤동호
김한구
김주형
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국일제지 주식회사
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Priority to KR1020150155274A priority Critical patent/KR101778520B1/en
Publication of KR20170053027A publication Critical patent/KR20170053027A/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/42—Ribbons or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D15/00—Printed matter of special format or style not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form

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  • Paper (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

The present invention relates to a method for manufacturing security paper, comprising the following steps: (a) dispersing a soft magnetic metal wire to a dispersion solution including a dispersant and manufacturing a composition for forming a detection layer; (b) respectively preparing a first stock liquid and a second stock liquid; (c) inputting the composition for forming a detection layer and the first stock liquid into a net of a rotating fourdrinier, dispersing the same and forming the detection layer; (d) spraying the second stock liquid to a rotating cylinder machine and forming a rear surface layer in the net of the cylinder machine; and (e) polymerizing the detection layer with the rear surface layer into security paper through a pair of rollers. According to the present invention, the detection layer can be easily formed.

Description

METHOD FOR MANUFACTURING SECURITY PAPER CONTAINING MULTI-MAGNETIC METAL WIRE AND SECURITY PAPER MADE THEREFOR [0002]

The present invention relates to a method of manufacturing a security paper comprising soft magnetic metal wire and to a security paper produced thereby.

With the recent emphasis on the importance of information, the need and concern for the security of these information is increasing day by day. Accordingly, security technologies for controlling the exporting of various storage media are being developed all the time, and there is an increasing tendency to control the exporting of the printed documents as well, so there is an attempt to prevent the export of the security tags by attaching detection tags to the security documents.

That is, a detection gate is provided at an entrance, and when a document with a detection tag is passed through the detection gate, the detection gate is detected and an alarm signal is provided to prevent the document from being carried out. These technologies are currently being used to prevent unauthorized removal of various books and documents from libraries and companies.

Here, the detection method of the tag for detection is typically an electromagnetic method in which a detection tag made of a metal material having soft magnetic properties detects a change in a magnetic field when the tag passes through an AC magnetic field generated by a detection means such as a detection gate Electromagnetic (Magnetic) and Metal Detector (Metal Detector) which detects common metals.

The electromagnetic method refers to a method using an electromagnetic field, and when a soft magnetic material is placed in an alternating magnetic field at a frequency of several Hz to several kHz as a frequency to be used, a change in an alternating magnetic field is generated to read harmonics. In order for the soft magnetic material to function as a sensor, it is advantageous that the saturation easily occurs in a weak external magnetic field, the larger the area of the magnetic hysteresis loop, and the larger the saturation magnetic flux density.

Metal Detector Detector is a tool for sensing metal objects that can not be easily seen by using electromagnetic induction and eddy current. When a magnetic field is generated by a coil through which an alternating current flows, an eddy current is generated in the metal. The metal detector consists of a pair of coils and an electronic circuit for control. If an alternating current is applied to the coil, a periodic magnetic field is generated in the coil. If there is a metal material under the coil, eddy current is induced by the changing magnetic field, and the metal material generates a magnetic field, Detects the change of the magnetic field and senses the metal material.

However, in order to utilize the detection system, a procedure or process for attaching detection tags or detection labels to each sheet of the security document is required, and a lot of labor and high costs are incurred in the process.

In addition, since the detection tag is exposed to the outside, the presence of the detection tag can be recognized by the user, and the tag can be intentionally damaged to leak the document.

In order to solve such a problem, a printing paper for security in which a detection tag is attached to one paper and another paper is laminated has been proposed (Korean Patent Publication No. 2008-0107977). More specifically, a first raw paper and a second raw paper which are adhered to one another by adhesive means; And at least one detection tag provided between the first and second sheets of paper and between the first and second sheets of paper.

However, when laminating a plurality of layers such as the above-mentioned security printing paper, the manufacturing cost of the printing paper for security may increase, and curling of the paper may occur in the laminating process .

KR publication No. 10-2008-0107977

The present invention seeks to provide a method of manufacturing a security sheet comprising a soft metal wire to facilitate detection by a metal detector and a security sheet produced thereby.

Disclosed is a method for producing a detection layer, comprising the steps of: (a) dispersing a soft magnetic metal wire in a dispersion solution containing a dispersant to prepare a composition for forming a detection layer; (b) preparing a first stock solution and a second stock solution, respectively; (c) injecting the composition for forming a detection layer and the first ground liquid onto a spinning net of a spinneret to diffuse it to form a detection layer; (d) spraying the second ground liquid onto a rotating circular mortar to form a back surface layer inside the net of the circular mortar; And (e) polymerizing the detection layer with a security paper through a pair of rollers together with the backing layer; The method comprising the steps of:

The present invention provides a security sheet manufactured according to the security paper manufacturing method.

According to the method for producing a security sheet of the present invention, the detection layer-forming composition prepared by dispersing the soft magnetic metal wire in the dispersion solution and the first stock solution are put on the net of the spinning stopper, respectively, Can be formed.

Further, since the attachment process of attaching the detection tag or the detection label and the laminating process of the paper sheet are omitted, the security paper can be easily manufactured, and labor and cost can be saved.

In addition, the security paper manufactured according to the manufacturing method of the present invention can prevent curling of the paper during the laminating process.

FIG. 1 is a schematic view of a security sheet including a soft magnetic metal wire manufactured according to an embodiment of the present invention.
2 is a schematic view of a paper machine according to an embodiment of the present invention.
3 (a) and 3 (b) are enlarged photographs of a security sheet including a soft magnetic metal wire manufactured according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar elements in the drawings, unless otherwise indicated by the same reference numerals, Detailed description of functions and configurations is omitted.

FIG. 1 is a schematic view of a security sheet including a soft magnetic metal wire manufactured according to an embodiment of the present invention. FIG. 2 is a schematic view of a paper machine according to an embodiment of the present invention. (A) and (b) are enlarged photographs of a security sheet including a soft magnetic metal wire manufactured according to an embodiment of the present invention.

Hereinafter, a method of manufacturing the security paper 100 including the soft magnetic metal wire according to the present invention and the security paper 100 manufactured thereby will be described in detail with reference to FIGS. 1 to 3 and the embodiments.

The present invention relates to a method of manufacturing a security paper (100) comprising a soft metal wire (111) for easy detection by a metal detector and a security paper (100) produced thereby.

Here, the soft magnetic material refers to a magnetic material having a high magnetic permeability and a coercive force. The soft magnetic material includes ferrite (Fe-Ni-Zn / Mn ferrite), permalloy, (Mo-permalloy), amorphous alloy, Sendust (Fe-Si-Al alloy), Fe-Ni alloy and Fe-Si alloy Lt; / RTI > On the other hand, the amorphous alloy is a mixture of metals such as Fe, Ni, and Cr. The amorphous alloy can be produced with different metal ratios at the time of production.

In addition, since the soft magnetic metal wire 111 according to the present invention has a large residual magnetic flux density and a small coercive force and residual magnetization, it has a high magnetic permeability, and is magnetized only when an external magnetic field is applied. The characteristics almost disappear. Therefore, the paper containing such a soft magnetic material can be easily detected in the electromagnetic detection gate.

The method for manufacturing the security paper 100 of the present invention includes the steps of: (a) dispersing a soft magnetic metal wire 111 in a dispersion solution containing a dispersant to prepare a composition for forming a detection layer; (b) preparing a first stock solution and a second stock solution, respectively; (c) forming the detection layer 110 by injecting the composition for forming a detection layer and the first ground liquid onto a rotatable net 221 of a spinneret and diffusing the same; (d) spraying the second ground solution onto a rotating tunnel 230 to form a back layer 120 on the net 231 of the tunnel; And (e) polymerizing the detection layer (110) with the backing layer (120) to the security paper (100) through a pair of rollers; .

The method for manufacturing the security paper 100 according to the present invention is characterized in that the soft magnetic metal wire 111 is dispersed in a dispersion solution using a dispersant, do.

More specifically, the step (a) includes the steps of: i) adding a dispersant to the dispersion solvent to prepare a dispersion solution, and ii) adding the soft magnetic metal wire 111 to the dispersion solution. At this time, the dispersion solution may contain 0.1 to 1.0 part by weight, preferably 0.3 to 0.6 part by weight, of a dispersant relative to 100 parts by weight of the dispersion solvent. On the other hand, when the dispersant is contained in an amount of less than 0.3 part by weight based on 100 parts by weight of the dispersion solvent, problems such as precipitation or aggregation of the soft magnetic metal wire 111 occur on the surface of the solvent, When the amount of the pulp or the like is changed, the dehydration of the long-tiller 220 becomes poor and the formation of the feed (detection layer) is not normally performed in the paper machine, It may be difficult to produce the paper 100.

Here, the term "dispersant" refers to a substance that is added to prevent agglomeration of small particles and colloidal particles formed by pulverizing large particles and agglomerated particles to form smaller particles and colloidal particles, and refers to an adsorbent such as a surfactant or a polymer substance. In the present invention, it is preferable to use polyamines such as starch, polyvinyl alcohol (PVA), carboxymethylcellulose (CMC), methylcellulose, aliphatic amine salts, quaternary ammonium salts, polyester ester carboxylates, Salts thereof, sulfuric acid esters of higher alcohols, alkyl sulfonic acid salts, alkylphosphoric acid esters, aliphatic carboxylic acids and salts thereof, polyaminoamides and their phosphates, sodium polyacrylate, styrene-maleic anhydride copolymer, sodium ligninsulfonate, polyethylene Glycol, sorbitan aliphatic keroene oxide adduct Lt; / RTI >

In addition, in the step of adding the soft magnetic metal wire 111 to the dispersed solution, the soft magnetic metal wire 111 may be added in an amount of 0.1 to 2.0% by weight or 0.5 to 1.0% by weight based on the total weight of the dispersion solution .

On the other hand, if the soft magnetic metal wire 111 is less than 0.5% by weight based on the total weight of the dispersion solution, a problem may be caused in output. If the soft magnetic metal wire is more than 1.0% by weight, Can be increased.

As a specific aspect, the step of adding the soft magnetic metal wire 111 can be stirred for about 5 to 20 minutes at a speed of 1500 to 3000 rpm for easier mixing. As an example, stirring can be carried out at a speed of 2400 rpm for 10 minutes.

In addition, after the step ii), iii) the dispersion solvent is further added to the total weight of the dispersion solution to which the soft magnetic metal wire 111 is added so that the content of the soft magnetic metal wire 111 in the solution is 0.01 to 0.09% by weight; . ≪ / RTI > On the other hand, if the dispersing agent and the soft magnetic metal wire 111 are simultaneously injected into the solvent or the order of introduction into the solvent is changed, dispersion of the soft magnetic metal wire 111 may not occur.

In addition, the soft magnetic metal wire 111 used as the detecting material of the present invention may be a wire having a thickness of 10 to 15 mu m and a length of 1 to 10 mm.

Particularly, it is important to control the thickness, length and width of the soft magnetic metal wire. If the thickness of the wire is too thin, it may cause a problem in detection. If it is too thick, Unevenness may occur, leading to problems in running quality and image quality during printer printing.

If the length of the wire is too short, it may cause a problem in the detection force. If it is too long, it may be difficult to mix with the gel or extrusion, and the blade may be damaged when the paper is cut. If the width of the wire is too narrow as well as the length, there is a problem in the detection force, and if it is too large, it is difficult to be mixed at the time of pasting or extrusion, and the blade may be damaged at the time of cutting the paper.

The above-mentioned first stock solution and second stock solution refer to the same amount of stock, and may be used as a general security paper 100. [

Here, the term "paper stock" means that the paper pulp in a state of being pulverized in water used for producing paper, that is, pulp is appropriately mixed and mixed with a filler, a sizing agent, a dye, and the like and sent to a paper machine.

More specifically, raw paper is prepared by mixing 75 to 90% of softwood and hardwood pulp, 10 to 20% of calcium carbonate, 0.15% of alkinketene dimer as a neutral sizing agent, 0.05% of defoamer, 0.03% of fixer, 0.5% of dehydrating agent and 0.05% The security paper 100 may be manufactured by mixing the composition for forming a detection layer prepared using the long trough 220 and the trough 230.

This is a conventional material, and a more specific manufacturing method is known to a person skilled in the art, and will not be described here.

1, the security sheet 100 manufactured by the method of manufacturing the security sheet 100 according to the present invention includes a detection layer 110 and a back layer 120, Layer composition and a first ground liquid, and the back layer 120 may be composed of a second ground liquid.

More specifically, as described above, the detection layer forming composition and the first ground liquid are put on a spinning net 221 of a spinneret to diffuse to form a detection layer 110, The back layer 120 can be formed inside the net 231 of the mesh netting by spraying the fluid on the rotating net rotator 230. The detection layer 110 may then polymerize with the security layer 100 via the pair of rollers together with the backside layer 120.

In particular, the method of manufacturing the security sheet 100 of the present invention can use the conventional sheet metal stopper 220 and the metal stopper 230 shown in FIG.

Here, the term " polymerization " means that the detection layer 110 and the back surface layer 120 are superposed and joined together, which means that they are joined together.

More specifically, the long-distance ridge 220 and the long-distance ridge ridge 230 are arranged in a state of being spaced apart in a horizontal form. And a head box 210 to be inserted into the surface of the ridge 220 may be provided.

In addition, the circulation stopper 230 may be inserted into a large water reservoir having a ground liquid spray nozzle 250 and rotated.

Meanwhile, the composition for forming a detection layer manufactured according to an embodiment of the present invention can be separately stored in a stock solution storage tank (not shown) together with the first stock solution, and the composition for forming a detection layer and the first stock material The liquid is discharged from the stock solution storage tank to the head box 210 and diffused and spread evenly on the net 221 of the long trough. A wet paper for constituting the wet paper 110 can be made. In addition, the detection layer 110 may be bonded to the back layer 120, which is generated from the spinneret 230.

As a specific aspect, a pair of rollers 240 may be provided between the long and short rotators 220 and 230. In this case, And a second roll 242 for winding and conveying the first roll 241 and the net 231 of the spinneret. The detection layer 110 formed on the long rollers 221 can be moved along the net 221 of the long rollers 221 by the first roll 241 and can be moved along the first rolls 241, When the second roll 242 is engaged with the second roll 242, the detection layer 110 can be transported on the net 231 of the net roll wrapped around the second roll 242.

In addition, the security sheet 100 in a state in which the detection layer 110 and the back layer 120 are polymerized can be conveyed to the press by the rotation of the wet felt, And dried sufficiently while abutting against the surface of the high temperature drying roller.

On the other hand, if the thickness of the detection layer 110 is too thick, it is advantageous for shielding the soft magnetic metal wire, and there is no problem of curling in the production of the paper, but the unit price is increased and problems in the printer running property and fixing property may occur. On the other hand, if the thickness of the detection layer 110 is too thin, the fixing property of the printer increases, and the unit price is favorable. However, shielding of the soft magnetic metal wire 111 is not easy and curling of the paper occurs. Therefore, the thickness of the detection layer 110 is preferably 30 to 200 占 퐉 in consideration of process conditions, shielding property, and printer suitability. In a specific embodiment, the thickness of the detection layer 110 may be 50 to 100 mu m.

In a specific aspect, the security sheet 100 produced in the present invention is characterized in that the soft magnetic metal wire 111 included therein is amorphous.

Here, the amorphous arrangement means that the soft magnetic metal wire 111 contained in the security paper 100 is in an amorphous state, and the soft magnetic metal wire 111 is not disordered .

In particular, when the soft magnetic metal wires 111 are arranged in a regular arrangement or a rectangular shape in the paper, when such an arrangement passes through the detector, an induced magnetic field due to the eddy current due to the alternating current of the detector is not produced Therefore, the magnetic field is not changed and is not detected by the detector.

Therefore, the metal wire of the present invention preferably has an amorphous orientation in the paper (detection layer).

The vibrating means may be driven so that the soft magnetic metal wires 111 dispersed in the composition for forming a detection layer are amorphously arranged on the detection layer 110. The vibrations may be applied to left and right strokes 10, 15 mm, and frequency 100 to 150 times / min. In addition, the raw material injection speed of the head box 210 and the J / W ratio of the machine wire can be adjusted from 1.000 to 1.300.

(F) dewatering the security paper 100 polymerized with the backing layer 120 and the detection layer 110; And (g) squeezing and drying the dehydrated security paper 100; . ≪ / RTI >

The security paper 100 thus manufactured is characterized in that 1000 to 1400 or 1200 soft magnetic metal wires 111 are included based on one sheet of A4 paper. If the number of the soft magnetic metal wires 111 is less than 1000, a problem may occur in the detection power. If the number of the soft magnetic metal wires 111 exceeds 1400, the manufacturing cost may be increased, and when the security paper 100 is cut, Problems can arise.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the following examples. However, the following examples illustrate the contents of the present invention, and the scope of the present invention is not limited to the following examples. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art.

< Example >

Example  One. The detection layer  Preparation of composition for forming

In this Example, a composition for forming a detection layer was prepared for the production of a security paper.

More specifically, the dispersing agent was dispersed in water and then soft magnetic metal wires were mixed. The dispersing agent used was carboxymethyl cellulose (CMC), and soft magnetic metal wires were permalloy (TNF) Were used.

First, 0.5 parts by weight of carboxymethyl cellulose was dispersed in water at 60 占 폚 with respect to 100 parts by weight of water as a dispersion solvent and stirred at 2000 rpm for 1 hour. Then the permalloy, which is a soft magnetic metal wire, was mixed with 0.9 wt% of the carboxymethyl cellulose dispersed water and stirred at 2400 rpm for 10 minutes.

Then, the mixture in which the permalloy was mixed was diluted with water so that the final concentration of the permalloy was 0.03%, and the mixture was stirred for 10 minutes to prepare a composition for forming a detection layer. At this time, the stirring speed was maintained at 350 rpm.

Example  2 to 4. The detection layer  Manufacture of security paper formed

The composition for forming a detection layer prepared in Example 1 was put into a papermaking process to make a white paper having a thickness of 100 탆.

More specifically, the paper was plowed using a papermaking machine having a combination of a papermaking machine and a papermaking machine, and the papermaking material was introduced into a papermaking reservoir of a pumice pod and a papermaking reservoir of a papermaking pod. It was poured into the reservoir of the paddy field and plowed through the paddy field.

On the other hand, in order to prevent the soft magnetic metal wire included in the composition for forming a detection layer prepared in Example 1 from having a uniform orientation, the J / W ratio of the injection of the raw material and the mechanical wire in the long- Respectively.

At this time, the inlet for the extraction of the raw material was located between the fan pump and the head box, and the J / W ratio of the machine wire to the jet of the feed was maintained to be 1200 or more.

FIG. 3 is an enlarged view of a security sheet including a soft magnetic metal wire manufactured according to an embodiment of the present invention, and it can be seen that the soft magnetic metal wire is arranged amorphous on a white paper.

The security paper prepared as described above was prepared as in Examples 2 to 4 according to basis weight, and the properties thereof are shown in Table 1 below.

Example 2 Example 3 Example 4 Basis weight (gsm) 70 ± 2.5 75 ± 2.5 80 ± 2.5 Thickness (㎛) 90 ± 5 95 ± 5 100 ± 5 Specularity (sec) 15 ± 10 15 ± 5 20 ± 5 Smoothness (sec) 50 ± 10 55 ± 10 60 ± 10 Size (sec) 20 ± 10 25 ± 10 30 ± 10 Whiteness (%) 100 ↑ 105 ↑ 110 ↑ Opacity (%) 85 ↑ 87 ↑ 89 ↑ Metal wire (pieces / sheet) 1200 ↑ 1200 ↑ 1200 ↑

100: Security paper
110: detection layer 111: soft magnetic metal wire
120: backside layer
200: Paper machine
210: Head box 220:
221: The paper-making machine 230: The paper-making machine
231: Surveyor papermaking machine 240: Roll part
241: first roll 242: second roll
250: injection nozzle

Claims (13)

(a) dispersing a soft magnetic metal wire in a dispersion solution containing a dispersant to prepare a composition for forming a detection layer;
(b) preparing a first stock solution and a second stock solution, respectively;
(c) injecting the composition for forming a detection layer and the first stock solution onto a spinning net of a spinneret to diffuse them to form a detection layer;
(d) forming a backing layer on the net of the spinneret by spraying the second stock solution onto a rotating spinneret; And
(e) polymerizing the detection layer with a security paper through a pair of rollers together with the backside layer; The method comprising the steps of:
The method according to claim 1,
The step (a)
i) preparing a dispersion solution by adding a dispersant to the dispersion solvent; And
Ii) adding the soft magnetic metal wire to the dispersion solution; Wherein the method comprises the steps of:
3. The method of claim 2,
The dispersion solution
And 0.1 to 1.0 part by weight of a dispersing agent is contained in 100 parts by weight of the dispersion solvent.
3. The method of claim 2,
The soft magnetic metal wire
And 0.1 to 2.0% by weight based on the total weight of the dispersion solution.
3. The method of claim 2,
After the step ii)
Iii) adding the dispersion solvent to the total weight of the dispersion solution to which the soft magnetic metal wire is added to dilute the soft magnetic metal wire so that the content of the soft magnetic metal wire in the solution is 0.01 to 0.09% by weight; Further comprising the steps of:
The method according to claim 1,
The soft magnetic metal wire
(Fe-Ni-Zn / Mn ferrite), Permalloy, molybdenum permalloy, amorphous alloy, Sendust, Fe-Si-Al alloy, (Ni-Alloy) and an iron-silicon alloy (Fe-Si alloy).
The method according to claim 1,
The soft magnetic material
A thickness of 10 to 15 mu m, and a length of 1 to 10 mm.
The method according to claim 1,
The dispersant
And examples thereof include starch, polyvinyl alcohol (PVA), carboxymethylcellulose (CMC), methylcellulose, aliphatic amine salts, quaternary ammonium salts, polyester ester carboxylates, polyamines of polymeric polyester carboxylic acids, Aliphatic carboxylic acid and its salts, polyaminoamide and its phosphate, sodium polyacrylate, styrene-maleic anhydride copolymer, sodium ligninsulfonate, polyethylene glycol, polyethylene glycol, Wherein the binder is at least one selected from the group consisting of sorbitan aliphatic and kelene oxide adducts.
The method according to claim 1,
The step (c)
Wherein the soft magnetic metal wire is amorphously arranged by driving the vibration means so that the soft magnetic metal wires dispersed in the detection layer forming composition are arranged amorphously on the detection layer.
The method according to claim 1,
The step (c)
The soft magnetic metal wire dispersed in the composition for forming a detection layer is amorphously arranged on the detection layer
(J / W ratio) between the ejection speed for injecting the composition for forming a detection layer and the first ground liquid onto the web of the long-lasting ridge and the long-distance ridge / Wherein the method comprises the steps of:
The method according to claim 1,
The step (c)
The composition for forming a detection layer
Wherein the bag is put into a headbox formed at the upper part of the net of the bag-making machine at a speed of 10 to 20 L / min.
The method according to claim 1,
The method of manufacturing the security sheet
(f) dewatering the security paper polymerized with the backside layer and the detection layer; And
(g) squeezing and drying the dehydrated security sheet; Further comprising the steps of:
13. A security paper produced by a method for manufacturing a secure paper according to any one of claims 1 to 12.
KR1020150155274A 2015-11-05 2015-11-05 Method for manufacturing security paper containing soft magnetic metal wire and security paper utilizing the same KR101778520B1 (en)

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CN110466248A (en) * 2018-05-10 2019-11-19 素材的脉有限公司 The safety of imager recording medium recognition unit
CN110468622A (en) * 2018-05-10 2019-11-19 素材的脉有限公司 Safety recording medium
KR20220144713A (en) 2021-04-20 2022-10-27 주식회사 소재의맥 Writing/reading medium for preventing leakage of hard copy

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KR101341164B1 (en) * 2013-05-16 2013-12-13 (주)티엔에프 Writing/reading means for security

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110466248A (en) * 2018-05-10 2019-11-19 素材的脉有限公司 The safety of imager recording medium recognition unit
CN110468622A (en) * 2018-05-10 2019-11-19 素材的脉有限公司 Safety recording medium
KR20220144713A (en) 2021-04-20 2022-10-27 주식회사 소재의맥 Writing/reading medium for preventing leakage of hard copy

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