JP2552717Y2 - Forgery prevention paper for stamps - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to stamp paper that is distributed in proportion to the price each time a product is sold in order to have the customer purchase the product continuously in a shopping street or the like. The present invention relates to a stamp forgery prevention sheet in which a stamp cannot be forged.

(Prior Art) The stamp referred to in the present invention is a specific stamp-shaped stamp printed on paper having a size of about 2 cm square, and is also called a sticker or a chip. That is, the stamp is
It is widely used as a means of sales promotion in specific stores, specialty store associations, store associations, etc., and every time a product is purchased, the product buyer receives a fixed percentage of stamps in proportion to the price, and When collected, the distribution destination has a function as a security that can be exchanged for gold vouchers or commodities. Since such stamps can be exchanged for gold products, counterfeit stamps can be circulated and cause serious damage, and various measures have been taken to prevent this.

In other words, stamp printing is usually performed by an ordinary printing method without using an expensive and elaborate printing method because of its use. In some cases, printing is performed using characters as a background.

In addition, as a countermeasure to prevent forgery in paper for stamp printing, silk fibers, one color, or fibers dyed in two or more feet were dispersed in raw pulp, or characters or patterns were formed on the roll surface during paper making. A method of attaching a so-called watermark, which is formed using a dandy roll of a fourdrinier paper machine, a netting of a round paper machine, etc., and pressing a wet paper web using a roll having a character or pattern engraved on the surface by a press part or the like. A method of forming an embossed pattern on a paper surface by passing paper between a mark roll and an elastic roll and forming an embossed pattern is known.

(Problems to be solved by the invention) In recent years, due to the progress of the subject technology, stamp printing is easily duplicated by ordinary printing, and there is a problem that high-grade printing and complicated printing increase the printing cost. . or,
The method of attaching a watermark or embossed pattern to paper is very difficult because it is extremely difficult to arrange and attach watermarked characters, patterns, etc. with a special color to each stamp because each stamp is about 2 cm square. When paper with fibers is forged,
There was a problem that a general person such as a store could not determine.

(Means for solving the problem) As a result of various studies to solve such problems, the present invention is applicable to watermarks and patterns using transparent ink for expressing watermarks, which are also applicable to stamps smaller than 2 cm square. Furthermore, stamp paper that can be easily distinguished from authenticity can be obtained by combining it with the embossed pattern in the papermaking process that has been used for anti-counterfeit paper and combining it with paper that has been blended with fibers dyed in the specified color. In addition to this, the transparent ink for expressing a watermark is mixed with a fluorescent reactant (hereinafter, referred to as a fluorescent reactant) that emits fluorescence when irradiated with ultraviolet light having a peak at a wavelength of 300 to 400 nm in a dark place. Using ink to form watermark characters and patterns,
Also, by using a paper made by mixing a fiber treated with a fluorescent reactive substance or a dye of a dyed fiber with a fluorescent reactive substance and dyed fiber, a relatively easily available ultraviolet irradiator (also referred to as an ultraviolet discriminator) ) Using the wavelength 300-400
By irradiating the stamp with ultraviolet light having a peak in nm to make the watermark characters and patterns fluorescent and make it possible to distinguish them, it is possible to provide a forgery prevention paper which is more difficult to forge and can be easily distinguished. .

That is, using a dyed fiber blended paper in which the fiber dyed in the color specified at the time of papermaking is mixed in the raw material as a paper, an embossed mark paper with a linear mark by an embossed mark, or a transparent ink for expressing a watermark. When printing and using the watermarked paper or the like in which the ink penetrates and retains the ink in the paper to express a watermark character or a pattern, a linear emboss mark is formed particularly on the dyed fiber-containing paper, and the ink is formed by the embossing. Paper with watermarks and patterns between the lines with the transparentizing ink for watermarking is harder to forge and easier to discriminate as compared to anti-counterfeiting paper that has been individually processed. It can be used satisfactorily, but for large lots of stamps that are used in large quantities over a large area, the fluorescent reactant is added to the transparent ink for expressing the watermark. By blending it with a dye that dyes or dyes the fiber, it is possible to easily determine whether the watermark character, pattern, or the dyed fiber emits fluorescence when irradiated with ultraviolet light by an ultraviolet light irradiator, It is possible to provide anti-counterfeiting paper which is more difficult to forge.

Fluorescent reactants that emit fluorescence when irradiated with ultraviolet light include fluorescent pigments that are obtained by dissolving a fluorescent dye in a synthetic resin and solidifying it into fine particles, sulfides such as zinc, calcium, and cadmium, and silicates. With copper, manganese, silver, etc. as an activator, a phosphor pigment that develops colors from blue to red, and a fluorescent whitening dye used in general fibers, paper, plastics, etc. Water-soluble,
There are many such as solvent-soluble, synthetic resin addition,
Any of them can be used, and many of the above-mentioned fluorescent reactants as paints and inks are commercially available, and any of them can be used in the present invention.

In general, solvent-based inks have good permeability to paper, and as a result, the resin that has penetrated into the paper with the solvent penetrates into the gaps between fibers and fills the inside of the fibers. It has a great effect of improving the watermark pattern to make the watermark pattern clear, and is preferably used, but in order to obtain good watermark printing, use a low-molecular-weight resin having good pattern expression and good permeability. Measures must be taken to prevent the resin from penetrating due to the capillary action of the fibers and causing bleeding, and to fix the fibers in the fiber gaps and inside the micelles. to that 100 g / m ² but less often foreign paper, typically a watermark expression transparentizing ink solvent system has good permeability into the paper, ink lacked sharpness is image printed and diffused in the planar direction blurred Because there is a possibility of becoming It is intended that is resolved understood to coat the oil resin polyvinyl alcohol or the like in internally added either surface 10-20 percent filler in the pulp is effective as measures.

As the emboss mark, any one of vertical, horizontal, diagonal, and wavy linear shapes, or an emboss pattern selected in combination is used. Desirably, a plurality of stamps may appear.

The dyed fiber is made of natural fiber such as hemp, linter, silk, synthetic fiber such as rayon, synthetic fiber such as polyester, nylon, etc. of wood pulp. It is good to mix and make paper.

(Function) In the anti-counterfeiting paper for stamps according to the present invention, the watermark characters and patterns do not appear when the paper is viewed with reflected light, but appear when viewed through light, and have a wavelength of 300 to 400 nm. Irradiates paper with ultraviolet light having a peak in a dark place to emit fluorescence. Fibers treated with a dye of the specified color as a fluorescent reactant appear as fibers of the specified color under natural light and have a wavelength of 300
It has the effect of appearing as fibers that emit fluorescence when the paper is irradiated with ultraviolet light having a peak at ~ 400 nm in the dark.

Note that the emboss mark has the effect of appearing as a mark of a depression when viewed with reflected light and appearing as a watermark mark when viewed through.

(Example) This invention is demonstrated according to an Example. In the examples, parts and% are parts by weight and% by weight.

Example 1. papermaking wood pulp as the main raw material, high quality paper to paper by Fourdrinier paper machine so that the basis weight of 68 g / m ^2, 1,
At the entrance of the second group of cylinder dryers divided into two or three groups, embossed lines with a spacing of 3 mm, a line thickness of 0.3 mm, and a height of 0.3 mm were engraved so as to have a 45 degree angle to the paper traveling direction. A diagonal emboss mark is attached by the embossing roll,
The surface was coated with polyvinyl alcohol in a size press to obtain a base paper.

Stefan 100 polyester resin (Hitachi Chemical Polymer Co., Ltd.) 30 as a transparent ink for developing watermarks
, A transparent ink consisting of 15 parts of the same resin curing agent TA92-020 (manufactured by Hitachi Chemical Polymer Co., Ltd.) and 55 parts of a mixed solution of 70% toluene and 30% ethyl acetate in 55 parts.
70% toluene / ethyl acetate to give a viscosity of 16 seconds at 20 ° C
The mixture was adjusted by adding a 30% mixed solution. Separately, a fluorescent coloring ink 53 containing a phosphor pigment that emits red fluorescence by ultraviolet light
65 Red (Dainichi Seika Kogyo Co., Ltd.) with toluene added
Adjust to 16 seconds at 20 ° C with No.3 Zahn cup. Mix the transparent ink and the fluorescent ink of the above adjustment at a ratio of 2: 1.
Using a printing roll engraved with the letters "YUWADO" at a depth of 35 microns and arranged at an angle of 45 degrees with respect to the direction of travel of the base paper, the characters were printed between the embossed marks by a gravure printing machine as shown in Fig. 1. Printing was performed so as to be arranged, and forgery prevention paper was obtained.

Using the obtained forgery prevention paper, stamp printing was performed with a label printing machine, and the obtained stamp had a diagonal embossed mark.
An `` O '' watermark character is placed between the hatched embossed marks, and when irradiating ultraviolet light with a peak at 365 nm with a UV irradiator in a dark place, a red fluorescent character appears. An easy stamp was obtained.

Example 2 1.5 denier rayon fiber having a fiber length of 3, 5 and 7 mm is added to a pulp paper material in which wood pulp for papermaking is used as a main raw material and a filler such as kaolin and clay is blended to 10% of pulp. 100 parts of the mixed rayon fiber is dyed and fixed with 2 parts of blue dye, 2 parts of fluorescent whitening dye and 0.5 part of aqueous solution of 1 part of soda ash, and blue dyed rayon fiber dyed and fixed with red dye and fluorescent whitening dye. Dye rayon fiber was blended in 0.05% each, and paper was made by an ordinary method using a fourdrinier paper machine. In the process, the line interval was 3 mm and the line thickness was 0.3 at the entrance of the cylinder dryer divided into groups 1, 2 and 3. mm, height
A diagonal embossing mark was formed by an embossing roll in which a 0.3 mm embossing line was engraved at an angle of 45 degrees with respect to the paper traveling direction. The obtained paper is a base paper having a basis weight of 68 g / m ² having a hatched emboss mark and scattered rayon fibers dyed with blue and red dyes.

Forgery prevention paper was obtained by the same method using the transparentizing ink for developing a watermark containing the fluorescent reactant used in Example 1 in this base paper.

Stamp printing was performed on the obtained anti-counterfeit paper with a label printer. In addition to the diagonal embossed marks, the resulting stamp was scattered with fibers dyed in two colors, red and blue. When seeing through, the watermark character of `` YUWADO '' is placed between the hatched embossed marks, and furthermore, when irradiating ultraviolet rays having a peak at 365 nm with an ultraviolet irradiator in a dark place, the characters and fibers that emit fluorescence are forged to emerge. A stamp that is difficult and easy to determine the authenticity was obtained.

Example 3 100 parts of softwood bleached kraft pulp in the main raw material of the paper pulp for papermaking of Example 1 were mixed with 2 parts of red dye and 0.5 parts of fluorescent whitening dye.
0.1 part of a red-colored pulp dyed and fixed with an aqueous solution of 1 part of soda ash and 1 part of soda ash was blended, followed by embossing with oblique lines and coating with polyvinyl alcohol as in Example 1 to obtain a base paper.

30 parts of polyester resin Stefine 100 (manufactured by Hitachi Chemical Co., Ltd.), 15 parts of resin curing agent TA92-020 (manufactured by Hitachi Chemical Co., Ltd.), Ubitex OB (manufactured by Nippon Kayaku Co., Ltd.) ) 0.2 parts and toluene 70
Fluorescent Watermarking Transparent Ink composed of 54.8 parts of a mixed solution of 5% by weight and 30% ethyl acetate at 20 ° C in No. 3 Zahn cup
The mixture was adjusted by adding a mixture of 70% toluene and 30% ethyl acetate so that the time became 16 seconds.
In the same manner as in the above, printing was performed by a gravure printing machine so that the characters were arranged between the oblique lines of the emboss marks to obtain a forgery prevention paper.

Using the obtained paper, stamp printing was performed by a label printing machine. As a result, red fibers were scattered throughout as shown in FIG. 2 and there was a diagonal emboss mark.
As shown in the figure, the watermark character of `` YUWADO '' is arranged between the oblique lines, and when irradiating ultraviolet rays with an ultraviolet irradiator, the character and the red fiber fluoresce, and a stamp with an easy forgery discrimination function was obtained. .

(Effects of the Invention) The anti-counterfeiting paper for stamps according to the present invention is configured as described above. The watermark character, the pattern, and the fiber colored in the designated color are used to determine the presence or absence of forgery under ordinary light. Further, when ultraviolet light having a peak at a wavelength of 300 to 400 nm is irradiated in a dark place, the fluorescent light appears and the presence or absence of forgery is determined, so that it is possible to provide a stamp forgery prevention paper which is difficult to forge.

Furthermore, we give emboss mark and, in the meantime, watermark letter,
If a pattern is arranged and wood pulp fibers dyed in a specified color or mixed with different types of fibers, it is possible to provide a forgery prevention paper for stamps, which is more difficult to forge. .

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a plan view of paper on which a character watermark is printed between hatched emboss marks, and FIG. 2 is a plan view showing a state in which dyed fibers are scattered. FIG. 3 is a plan view showing an example of stamp printing. 1 ... watermark printing section 2 ... dyed fiber 3 ... emboss mark 4 ... stamp printing section

 ──────────────────────────────────────────────────続 き Continuing on the front page Judge Masaaki Endo Judge Keiko Kakizawa Judge Ichiro Horikawa (56) Reference JP-A-55-50074 (JP, A) JP-A-1-168997 (JP, A) JP 60-32695 (JP, A)

Claims (2)

(57) [Scope of request for utility model registration] 1. Wood pulp for papermaking is used as the main raw material, and the filler is 10%.
During the paper making process of paper containing 20% by weight or paper coated with polyvinyl alcohol, a plurality of emboss marks are formed within a square of about 2 cm, and a wavelength of 300 to 4
Characters and patterns are printed using a solvent-based watermarking transparent ink containing a fluorescent reactive substance that emits fluorescence when irradiated with ultraviolet light having a peak at 00 nm, and the transparent ink is penetrated and fixed in the paper layer. , Stamp forgery prevention paper configured to form a pattern in which an embossed mark, a watermark character, and a pattern are combined. 2. A paper made mainly from wood pulp for papermaking is treated with a fluorescent reactive substance that emits fluorescence when irradiated with ultraviolet light having a peak at a wavelength of 300 to 400 nm, or a dye of a color designated as the fluorescent reactive substance. The anti-counterfeiting paper for stamps according to claim 1, wherein the paper is a paper in which the fibers are dispersed and mixed.