JP2007130855A - Security sheet blank for important document comprising small number of individuals and its manufacturing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sophisticated security sheet blank, for an important document, which comprises a small number of individuals, featuring not only improved security through combining a conventional open work technique with a publicly known security knowhow, but also the requirement to rewrite only a spot where measures are taken to obtain an image formed by an open work from a transparent printing image. <P>SOLUTION: This security sheet, for an important document, comprising a small number of individuals is made up of a support layer, an engraving layer which has a previously printed one image and is formed in one piece on the support layer, a back transparent matte layer which has a previously printed other different image and an appropriate surface roughness/a function to make the layer hardly chargeable and is integrally formed under the support layer, and a transparent printing layer which is integrally formed under the engraving layer and the back transparent matte layer. In addition, the transmission density of the support layer is not more than 0.15, and the transmission density of the support layer, the engraving layer and the back transparent matte layer is 0.15 or above and 1.00 or below. Besides, the surface glossiness of the engraving surface is not higher than 10.0%. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a security sheet for important documents with a small number of individuals and a manufacturing system therefor, and more specifically, a face capable of individual recognition on an engraveable white sculpture layer formed by imaging on one or both sides of a transparent synthetic resin sheet. The present invention relates to a security paper sheet for an important document with a small number of individuals and a manufacturing system for the same that can erase or rewrite the watermark image before processing on the part where the watermark has been engraved. .

  In particular, the present invention is used in a field where security paper sheets using plastic sheets can be used in small quantities as a result of adopting a processing method that can be produced in small lots, but can be discredited by being counterfeited. For example, the present invention relates to a security paper sheet for important documents that can be used for a certificate, a certificate of completion, a diploma, etc., and a manufacturing system thereof in a national government, an administrative institution, an educational institution, or the like.

  Conventionally proposed technology as security sheet paper for important documents such as credit cards has various functions such as printing with lower case letters, magnetic ink printing, near infrared absorption ink printing, watermark printing, copy prevention function printing, etc. As a complex, security was ensured.

  However, for most of these functions, the contents of the security functions are not publicly disclosed, except for banknotes and securities, etc., the functions are generally usable and publicly known. It was about watermark printing and copy prevention function printing.

  In addition, all the methods require only a certain production lot size, and it is difficult to apply individual security sheets with small lots.

  In order to engrave the card to be engraved, an appropriate surface roughness, that is, a required degree of hardness is required.

As security sheet paper proposed in the past,
For example,
JP 09-297536, JP-A-11-119649, JP 2001-246829 A, International publication WO00 / 20220, JP 2004-074597, JP2004-0985561, JP 2004-122666, JP 2004-347865, JP, 2004-358869, A, etc. are mentioned.

  In view of the above-mentioned problems, the present invention performs watermark engraving of face photographs and design designs that can be individually recognized on an engraveable white engraving layer formed by imaging on one or both sides of a transparent synthetic resin sheet. The watermark image that has been processed before the processing is erased or rewritten by the watermark engraving, and the watermark image that has been processed before the processing is deleted or rewritten by the watermark engraving. The present invention provides a small number of security sheet sheets for important documents and a manufacturing system thereof.

  A first aspect of the present invention is a watermark engraving having a support layer having a required area and thickness, and one image printed in advance with the required area and thickness, and integrally provided on the support layer. A layer, a different area pre-printed with a required area and thickness, a required surface roughness and a function that is difficult to be charged, and is provided integrally on the opposite side of the engraving surface layer of the support layer. A security sheet for important documents having a small number of individuals, comprising a backside watermark mat layer, a required area and thickness, and comprising the watermark engraving layer and the watermark printing layer integrally provided under the backside watermark mat layer. .

  A second gist of the present invention is a watermark engraving having a support layer having a required area and thickness, and one image preprinted with the required area and thickness, and integrally provided on the support layer. A reverse watermark mat layer integrally provided under the support layer, having a layer, the other different image printed in advance with the required area and thickness, and having a required surface roughness and a function that is difficult to be charged. The watermark engraved layer and the watermark printed layer integrally provided under the back surface mat layer, and having a transmission density of 0.15 or less of the support layer. This is a security sheet for important documents with a small number of individuals in which the transmission density of the engraving layer and the back surface mat layer is 0.15 or more and 1.00 or less and the engraving surface gloss is 10.0% or less.

  According to a third aspect of the present invention, at the stage of creating a security sheet, different watermark printing layers are formed by imaging on each of the engraving layer side and the non-engraved layer side of the support layer, and then the engraving layer is processed, It is a security sheet for important documents with a small number of individuals, such as transparent varnish ink, light color (each color) ink, fluorescent ink, ultraviolet color ink, and phosphorescent ink.

  According to a fourth aspect of the present invention, in the imaged watermark printing to be processed, different imaged watermark printing is performed on both sides of the support layer, and the image present on the engraving layer side of the support layer by appearance and the support layer In order to make it impossible to determine whether the image is present on the non-engraved layer side, the back surface mat layer having a high transmittance is applied to the non-engraved layer side of the support layer by silk screen printing in the same manner as the engraved layer. The matte layer not only makes it impossible to determine the processing surface of different images in imaged watermark printing by appearance, but also makes it a security sheet, and makes it possible to carry out offset printing during various post-processing operations and makes it pass through various printers. Security for important documents with a small number of individuals, characterized by having an antistatic performance of about 10 to the 11th power with an appropriate surface roughness and surface electrical resistance value in order to improve performance such as security It is over door paper.

  According to a fifth aspect of the present invention, there are a step of engraving from a sculpture layer to a support layer, a step of engraving a watermark printed layer by imaging laminated on the sculpture layer side of the support layer, and only a desired portion. Engraving simultaneously with the engraving layer, the step of forming a new watermark image by the engraving action, and the watermark imaging printing on the engraving layer side of the support layer that has already been imaged and printed It has a process of erasing or rewriting the layer, and has an antistatic performance of about 10 to the 11th power with an appropriate surface roughness and surface electrical resistance value, and is easy to see and difficult to produce a similar counterfeit product. This is a security sheet paper manufacturing system for important documents.

  (1) According to the security sheet for important documents and its manufacturing system according to the present invention with a small number of individuals, not only the improvement of security by the fusion of the conventional watermark engraving technology and the known security technology, but also the watermark printing. By rewriting only the portion where the image is processed into the image formed by the watermark engraving, higher security can be provided in a small lot.

  (2) The security sheet for important documents with a small number of individuals according to the present invention has a higher security in a small lot and at least partly a support layer (transparent synthetic resin sheet) and a white engraving layer (silk screen printing) In order to increase security in the stage of creating a watermark engraving security sheet paper consisting of a backside mat layer (by silkscreen printing), individual required clear watermark printing images and watermark engraving images And can be processed on the transparent support mainly by silk screen printing.

(3) The security sheet for important documents with a small number of individuals according to the present invention is a support layer that is easy to visually recognize, is almost impossible to copy similar counterfeit products, and the watermark image is not erased or rewritten by the mat layer. Protect watermark printed images on the non-engraved side.

(4) Accordingly, the security sheet sheet for important documents with a small number of individuals according to the present invention can be used for a certificate, a certificate of completion, a diploma, etc. in, for example, a national government agency, an educational institution, or the like.

(5) Each issuer's design and issuer's signature can be imaged by watermark printing, and not only the issuer's design but also the recipient's face photo image, signature handwriting, etc. by sculpture, It can be used as a security sheet that cannot be counterfeited.

(6) In addition to other general security functions, the engraving means of the present invention can provide functions as a security sheet having specificity.

(7) According to the present invention, it is possible to obtain a security sheet that can provide a high-dimensional security function after the engraving process.

  According to the security sheet for important documents and the system for manufacturing the same, according to the present invention, the white engraving layer that can be engraved is formed on the transparent synthetic resin sheet on which the imaged watermark printing is formed on one side or both sides. The white sculpture layer is engraved with a face photograph or design that can be individually recognized by the sculpture means, and the watermark image before processing is erased or rewritten by the watermark engraving. It is characterized by things.

Embodiments of a security sheet for important documents with a small number of individuals according to the present invention will be described below with reference to the drawings.
The support layer 10 of the security sheet for important documents with a small number of individuals according to the present invention is a transparent synthetic resin sheet (for example, polypropylene, polystyrene, polyethylene terephthalate, vinyl chloride, etc.) that is generally used and has a certain degree of transparency. Any material can be used as long as it is obtained. However, white pigments and foam sheets with extremely poor transparency cannot be used because the visibility of the watermark image is extremely poor.

  On the support layer 10 having the required area and thickness, a watermark engraving layer 20 having one image preprinted with the required area and thickness is integrally provided, and the watermark engraving layer 20 and the required area and thickness are integrated. The other back image printed in advance, a back surface mat layer 40 having a required surface roughness and a function that is difficult to be charged, are integrally provided on the opposite side of the engraving surface layer of the support layer 10.

  A copy-forgery-inhibited pattern printing layer 50 having a required area and thickness is provided integrally on the watermark engraving layer 20, and under the back surface mat layer 40, a copy-forgery-inhibited pattern printing layer 50 having a required area and thickness is provided on the back surface watermark mat layer 40. The security sheet paper P for important documents having a small number is provided integrally therewith.

  In addition, for materials that are extremely soft or extremely hard, it is necessary to select materials that have an appropriate degree of flexibility and softness in order to affect the storage stability of the engraved image. In addition, due to various problems, it is necessary to properly use them. For example, a polyester film is optimal for a certificate from the viewpoint of storage stability.

  However, it is necessary to use a stretched polyester film or an unstretched polyester film depending on the content of post-processing and the possibility of cutting or burring on the punched end face.

  In addition, a hard transparent vinyl chloride sheet or the like is effective when processing a face photograph image or the like by sublimation heat transfer printing during post-processing.

  The thickness of the support layer 10 is preferably about 0.1 to 0.3 mm, and the optimum thickness varies depending on the material, application, usage, versatility, and the like. For example, 0.1 mm is used for a stretched polyester film, and 0.2 mm is used for an unstretched polyester film or a hard transparent vinyl chloride sheet.

  The required area is preferably A3 size from the card size.

  The watermark engraving layer 20 of the present invention is a silk screen ink composed of a resin (binder) and a filler (filler), white ink (filler is mainly titanium oxide, etc.) and mat ink (filler is mainly synthetic silica, It is formed by printing with a mixture of calcium carbonate, kaolins such as barium sulfate, talc and clay). In order to obtain the proper transmission density and glossiness, it differs depending on the manufacturer and type of silk ink, so it is necessary to examine the blending ratio each time.

  The thickness of the watermark engraving layer 20 is 3 to 50 μm, and in the case of a certificate, 5 to 20 μm is preferable.

  The resin (binder) used for the watermark engraving layer 20 depends on the support layer 10. For example, when the support layer 10 is a polyester film, polyester or polyurethane is suitable.

  When the support layer 10 is hard vinyl chloride, polyurethane, vinyl chloride, vinyl acetate copolymer, or the like is suitable. In each case, silk ink corresponding to the material of the support layer 10 is used.

  The hardness of the watermark engraving layer 20 is adjusted according to the type and amount of the curing agent, and the sharpness quality of the watermark image formed varies depending on the engraving quality.

  Moreover, adjustment of addition amount is needed also from a viewpoint of post-processing or blocking prevention.

  The watermark printing layer 30 of the present invention can be formed using a transparent varnish silk screen ink (mainly called a medium using a transparent resin). Medium is a transparent, colorless ink that is usually added to other inks for density adjustment and gloss.

  The thickness of the watermark printing layer 30 is desirably as thin as possible, and preferably 3 μm or less if possible. This is because, after the watermark printed engraving layer 20 or the back surface mat layer 40 to be processed next is printed, if the image of the watermark printed layer 30 appears as irregularities on the engraved layer 20 or the mat layer 40, the support This is because it is possible to determine what kind of watermark image is printed on which side of the layer 10.

  As with the engraving layer 20, the silk screen ink used for the watermark printing layer 30 is made of a resin (binder) corresponding to the material of the support layer 10, respectively. However, since it is necessary to keep the thickness thin, it is necessary to use a silk screen ink containing a resin (binder) having a high viscosity and a low solid content.

  The silk screen ink used for the watermark printing layer 30 is useful in light colors (each color), fluorescence, ultraviolet color development, phosphorescence, etc. in addition to the transparent varnish. It is desirable to mix with a transparent varnish ink containing a resin (binder) having a high viscosity and a low solid content.

  The printing hardness is adjusted according to the type and addition amount of the curing agent, and is such that the image quality is not deteriorated by dissolution during the printing process of the watermark engraving layer 20 or the mat layer 40 in the next processing step. In addition, the engraving performance needs to be equal to that of the watermark engraving layer 20.

  The back surface mat layer 40 is formed of mat ink having an appropriate surface roughness (mainly the filler is titanium oxide, inorganic white pigment, synthetic silica, calcium carbonate, barium sulfate, kaolins such as talc clay). Is possible.

  The thickness of the back surface mat layer 40 is 3 to 30 μm, and in the case of a certificate, 3 to 15 μm is preferable.

  The hardness of the back surface mat layer 40 is adjusted by the type and amount of the curing agent.

  Since it is not engraved, it may be unnecessary, but it may be necessary as a measure to prevent blocking.

  The back surface mat layer 40 needs to have an antistatic performance of about 10 11 to the surface electric resistance value in order to improve paper passing performance in offset printing at various post-processing and paper passing performance in various printers. Yes, this can usually be processed by mixing the antistatic ink with the ink or mixing the antistatic agent with stirring.

  The security process such as copy-forgery-inhibited pattern printing may cause trouble (such as poor adhesion) in the printing or printing process by the user when using UV offset ink on the engraving layer 20 side. Cost. Conversely, the anti-blocking effect is also improved when the mat layer 40 is used or when UV offset ink is used.

  The security sheet obtained by the present invention is at least partially from the support layer 10 (transparent synthetic resin sheet), the white engraving layer 30 (by silk screen printing), and the back surface mat layer 40 (by silk screen printing). A watermark sheet that can be engraved and has a transmission density of 0.15 or less of the support layer 10, and a transmission density of the support layer 10, the engraving layer 20, and the back surface mat layer 40 of 0.15 or more, 1 It is a security sheet for important documents with a small population of 0.000 or less and engraving surface gloss of 10.0% or less.

  Different watermark printing layers 30 (images) are printed on both surfaces of the support layer 10 of the security sheet obtained according to the present invention before the white engraving layer processing, and the ink used there is a transparent varnish ink, Light color (each color) ink is generally used, but fluorescent ink, ultraviolet coloring ink, phosphorescent ink, and the like are also useful.

  Further, in order to cover the watermark printing (image) on the non-engraved layer side, the mat layer 40 (with a certain degree of surface roughness) is used to make it difficult to determine which side of the support layer 10 is printed. A tint block printing layer (by offset printing) 50 for final security can be applied.

  In examining the printed coating film of the engraving layer 20 of the present invention, experiments as shown in the following list were performed, and the resolution of the watermark engraved images was compared.

  As described above, the thickness of the support layer 10 is preferably about 0.2 mm, and is based on a double-sided easy-adhesion-end stretched polyester sheet (PET-G) manufactured by Kanebo Gosei Co., Ltd. Further, samples as shown in Table 1 were obtained by using the white sculpture layer and the mat layer as a reference for each of the X and Y inks by weight ratio and appropriate dilution. However, the curing agent ratio was the recommended curing agent ratio of the manufacturer.

Experimental example

  Table 1 shows the ink composition, surface ink layer thickness, back surface ink layer thickness, transmission density, engraving surface surface gloss, experimental sheet density, engraving image contrast, resolution, and the like of this security sheet.

  However, for the matte ink that is actually used on the back side, because the experiment mainly focuses on the density of the finished sheet due to the difference in concealment between the front surface (engraved surface) and the back surface (matte surface), the contrast and image resolution during engraving However, it was an experimental example by an alternative test obtained by mixing white ink and transparent medium ink similar to the engraving layer.

  In the embodiment, the watermark printing layer 30 and the tint block printing layer 50 are provided, but this is omitted, and the ink formulation having the antistatic effect necessary for obtaining the appropriateness of the printer is not used.

Explanation of Table 1 above Note 1)
X ink: SSPC white, manufactured by The Inktech Co., Ltd. Y ink: ACT (N) 800 medium, manufactured by Seiko Advance Co., Ltd. The ink formulation was converted to a weight ratio and used as an experimental example. For adjusting the silk screen printing thickness, an organic solvent (xylene, cyclohexanone, etc.) was appropriately added and diluted.

Note 2) Experimental data measuring instrument Film thickness meter: Measured with a film thickness meter manufactured by Mitutoyo Corporation.
Transmission density: Measured with a transmission density meter (TD931) manufactured by Macbeth Co., Ltd.
Glossiness: Measured with a micro gloss (60 ° angle) manufactured by Big Chemie.

Experimental example results and discussion

  Sample No. Although evaluations with high performance of 7 to 12 were obtained, the quality level required varies depending on the usage environment, etc., so it is considered that not only all the results obtained this time but also a wider area are effective. .

  However, as a factor for maintaining the effect higher, it has been confirmed that maintaining the concealment property of the surface layer (engraved layer) higher than that of the back surface mat results in high contrast and high resolution in image formation during engraving.

These are the typical partial expanded sectional schematic diagrams of the security sheet | seat sheet | seat for important documents with few individuals which provided the security which concerns on this invention. FIG. 4 is a schematic partial enlarged cross-sectional schematic view of a security sheet for important documents with a small number of individuals to which high-dimensional security is provided after engraving.

Explanation of symbols

P Security sheet for important documents;
10 support layer;
20 Openwork sculpture layer;
30 watermark printing layer;
40 Back side watermark mat layer;
50 Background pattern printing layer.

Claims (5)

  A support layer having a required area and thickness, and a watermark engraving layer integrally provided on the support layer, having one image printed in advance with the required area and thickness, and a required area and thickness. A back watermark mat layer integrally provided on the opposite side of the engraved surface layer of the support layer, having the other different pre-printed image, a required surface roughness and a function that is difficult to be charged. A security sheet for an important document having a small area and thickness, and comprising a watermark printing layer integrally formed under the watermark engraving layer and the backside watermark mat layer.   A support layer having a required area and thickness, and a watermark engraving layer integrally provided on the support layer, having one image printed in advance with the required area and thickness, and a required area and thickness. The other side of the pre-printed image, the required surface roughness and the function of being difficult to be charged, and the back surface watermark mat layer integrally provided under the support layer, and the required area and thickness. A watermark printing layer integrally provided under the watermark engraving layer and the backside watermark mat layer, and the support layer, the engraving layer, and the backside mat having a transmission density of 0.15 or less of the support layer. 2. The security sheet for important documents having a small number of individuals according to claim 1, wherein the transmission density of the layer is 0.15 or more and 1.00 or less and the surface gloss of the engraved surface is 10.0% or less.   In the stage of creating the security sheet, a different watermark printing layer is formed by imaging on each of the engraving layer side and the non-engraving layer side of the support layer, and then the engraving layer is processed, and the ink used for forming the watermark printing image is formed. 2. The security sheet paper for important documents having a small number of individuals according to claim 1, wherein the varnish ink is transparent varnish ink, light color (each color) ink, fluorescent ink, ultraviolet color developing ink, phosphorescent ink, or the like.   In the imaged watermark printing to be processed, different imaged watermark printing is performed on both sides of the support layer, and the image existing on the engraved layer side of the support layer and the non-engraved layer side of the support layer are visually observed In order to make it impossible to determine whether the image is an image, silk screen printing is performed on the non-engraved layer side of the support layer on the non-engraved layer side in the same manner as the engraved layer. In addition to making it impossible to judge the processing surface of the product by appearance, it is moderated to improve the performance such as the paper-passability in offset printing and the paper-passability in various printers at the time of various post-processing that is made into a security sheet. 2. The security sheet for important documents having a small number of individuals according to claim 1, wherein the sheet has an antistatic performance of about 10 to the 11th power in terms of surface roughness and surface electrical resistance.   Engraving from the engraving layer to the support layer, engraving the watermark printed layer by imaging laminated on the engraving layer side of the support layer, and engraving only the desired portion simultaneously with the engraving layer, etc. A step of newly forming a watermark image by the engraving action, and a step of erasing or rewriting the watermark imaged printing layer on the engraving layer side of the support layer that has already been imaged and printed. Manufacturing of security sheet paper for important documents with an appropriate anti-static performance of about 10 11 with moderate surface roughness and surface electrical resistance, and with a small number of individuals that are easy to see and difficult to produce similar counterfeit products system.