JP2008230229A - Transparent card - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transparent card which has visually excellent transparent feeling and the machine reading aptitude for an ATM, CD or the like, and to provide its manufacturing method. <P>SOLUTION: The transparent card 1 comprises a card which keeps transparent oversheets 13 and 14 overlying the exterior surface of transparent core sheets 11 and 12, and is characterized in that the coating of the printing ink containing an infrared absorption agent having the maximum absorption region in the wavelength of 800 nm-900 nm is carried out to the whole of one surface of the transparent core sheets 11 and 12, the coating of the printing ink containing an infrared absorption agent having the maximum absorption region in the wavelength of 1,000 nm or more is carried out to the whole surface of another surface of the transparent core sheets, and the transparent oversheets overlie the coated surface side. The transparent core sheets may be a single layer, and the printing inks containing an infrared absorption agent may be coated in piles so that both coating positions may be in agreement with a portion of an optical transmission nature measuring domain which JISX6305 specifies. Alternatively, the core sheet may be double-printed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a card using a transparent card substrate such as a credit card, cash card, point card, employee card, etc., and relates to a transparent card having a transparent portion in at least a part of the design.
Therefore, the field of use of the present invention relates to the field of manufacture or use of cards such as cash cards and credit cards.

Cards such as credit cards, cash cards, point cards, employee ID cards having a magnetic recording unit are driven in a card reader for reading magnetic recording data.
For example, when a card is inserted into an ATM (automated teller machine), the ATM detects the end of the card, detects that the card has been inserted, and starts reading the magnetic recording unit.

For this reason, JISX6301's 8.1.10 conforming to ISO / IEC7810 specifies the light transmittance of the card. “All machine-reading cards have a light transmission density of 1.5 or more in the specified area. It must have. "
The area is defined in JISX6305, and in a wallet size card (ID-1 type having a width of 85.4 mm, a height of 53.98 mm, a thickness of 0.76 mm), an area of 21.0 mm from the upper edge of the card; The area is 10.0 mm from the lower edge of the card.
In addition, a light transmission densitometer having a sensitivity of up to 900 nm in wavelength is designated as the test apparatus.

Therefore, in many cases, a transmissive infrared sensor is used to detect the leading edge of the card. In the transmissive infrared sensor, for example, an infrared light projecting unit is attached to the front side of the card and a light receiving unit is attached to the back side along the ATM card travel path. When the card passes between the light projecting unit and the light receiving unit, the light receiving unit detects that the card has passed because the infrared rays irradiated from the light projecting unit are blocked by the card.
However, depending on the external reader, the card may be detected by using an infrared sensor at a position other than the light transmittance regulation region. In this case, the entire surface of the card needs to have infrared absorption characteristics.

  In order for the card to be detected, the card substrate must block infrared rays. In the case of a normal card, an opaque white pigment is kneaded into the base material, so that infrared rays are blocked. On the other hand, the transparent card is also called a skeleton card and has a lot of lovers since it has a stylish sense. Therefore, it is necessary to supply a transparent card that has sufficient transparency and that satisfies the light transmission density regulations such as ATM.

In order to satisfy such needs, conventionally, an infrared absorber is kneaded into a card base resin, or used as a printing ink and applied to a card base.
For example, Patent Document 1 relates to a “transparent card”, but a light-absorbing material such as a phthalocyanine compound, an anthraquinone compound, a polymethine compound, a cyanine compound, an aminium compound, or a diimonium compound is used alone or as a card substrate. A transparent card that absorbs light having a wavelength of 550 nm or more and 1000 nm or less by using a mixture is proposed.
However, many infrared absorbers and light absorbers themselves have a dark color, and a card mixed with these absorbers becomes a colored translucent card, and the entire surface of the card is visually transparent. Manufacturing a high transparency card is difficult. In addition, when kneading an infrared absorbent into a card substrate, it is necessary to manufacture a large amount of the substrate in advance, and it is difficult to handle a small lot.

Patent Document 2 relates to a “transparent magnetic card”, but proposes printing an ink layer containing a dye that absorbs an infrared region of 800 nm to 1000 nm on a card substrate. However, the specific content of the infrared absorbing material has not been clarified.
Patent Document 3 is a prior application by the applicant of the present application, but is a transparent card using a printing ink using an infrared absorbent having a maximum absorption range at wavelengths of 800 nm to 1050 nm, and the printing ink includes two kinds of printing cards. It is proposed to use a mixture of infrared absorbers. Patent Document 3 lists bisthiobenzyl nickel and phthalocyanine compounds as specific infrared absorbers. However, the card by this also has a problem that the transparency of the infrared absorbent ink printing part is not sufficient.

JP 2001-301369 A JP 2001-319325 A Japanese Patent Application No. 2003-327646

Therefore, the present invention is not kneaded with an infrared absorbent into a card substrate, but can be used for small-lot production by selecting an absorbent with a high infrared absorption effect and converting it into a printing ink, and transparent card transparent It has been completed by earnest research to achieve a card that provides a sufficient visual feeling.
That is, the transmittance of the visible light region that is easy to recognize visually is increased, and in the light transmittance measurement region of the card stipulated by JISX6305, a sufficient concentration can be obtained by blocking infrared rays exceeding 1000 nm. It is the invention made as.

  The first of the gist of the present invention for solving the above problems is an infrared ray comprising a card having a transparent oversheet laminated on the outer surface of a transparent core sheet, and having a maximum absorption region at a wavelength of 800 nm to 900 nm on one surface of the transparent core sheet. Apply the absorbent-containing printing ink on the entire surface, and apply the infrared absorbent-containing printing ink having the maximum absorption region in the region of the wavelength of 1000 nm or more on the other surface of the transparent core sheet on the coated surface side. A transparent card, wherein the transparent oversheet is laminated.

  The second of the gist of the present invention is an infrared absorbent-containing printing ink comprising a card in which a transparent oversheet is laminated on the outer surface of a transparent core sheet, and having a maximum absorption region at a wavelength of 800 nm to 900 nm on one surface of the transparent core sheet. Apply the infrared absorbent containing printing ink having the maximum absorption range at a wavelength of 1000 nm or more to the other surface of the transparent core sheet, and apply both of them to at least a part of the light transmittance measurement region of the card specified by JISX6305. The transparent card is characterized in that the coating positions are overlapped and the transparent oversheet is laminated on the coated surface side.

  The third aspect of the present invention is an infrared absorbent-containing printing ink comprising a card in which a transparent oversheet is laminated on the outer surface of a transparent core sheet, and having a maximum absorption region at a wavelength of 800 nm to 900 nm on one surface of the transparent core sheet. And a transparent card comprising an infrared absorber-containing printing ink having a maximum absorption region in a wavelength region of 1000 nm or more, which is applied over the entire surface, and the transparent oversheet is laminated on the coated surface side, It is in.

  4th of the summary of this invention consists of the card | curd which laminated | stacked the transparent oversheet on the outer surface of the transparent core sheet | seat, and the infrared absorber containing printing ink which has a maximum absorption area in wavelength 800nm-900nm on the surface of 1 of a transparent core sheet | seat. And an infrared-absorbing agent-containing printing ink having a maximum absorption region in a wavelength region of 1000 nm or more, so that both coating positions overlap at least a part of the light transmittance measurement region of the card specified by JISX6305. In the transparent card, the transparent oversheet is laminated on the coated surface side.

In the said transparent card | curd, when the spectral transmittance of both infrared absorber containing printing ink coating parts is measured, it is made to have a part which shows the spectral transmittance of 60% or more in the area | region of wavelength 550nm-600nm. Similarly, a portion having a spectral transmittance of 50% or more can be continuously provided. In those cases, excellent transparency of the card can be obtained.
Further, in the light transmittance measurement region of the card specified by JISX6305, the light transmittance by the spectrophotometer over the wavelength range of 800 nm to 1150 nm can be set to 5.0% or less. In that case, in the near infrared region In most cases, infrared shielding properties are obtained.

  In addition, the transparent core sheet is composed of a two-layer core sheet, and an infrared absorbent-containing printing ink having a maximum absorption range at a wavelength of 800 nm to 900 nm is applied to the transparent oversheet laminated surface of one transparent core sheet, It is good also as what coated the infrared absorber containing printing ink which has a maximum absorption area in the area | region with a wavelength of 1000 nm or more on the transparent oversheet lamination surface of 1 transparent core sheet.

  5th of the summary of this invention consists of a card | curd which laminated | stacked the transparent oversheet on the outer surface of the transparent core sheet, or apply | coated the overcoat, and has the maximum absorption area in the area | region more than wavelength 1000nm on the surface of 1 of a transparent core sheet. The entire surface or a part of the ink containing the infrared absorbent containing the ink is coated, and the other part of the surface of the transparent core sheet is coated with the ink containing the infrared absorbent having the maximum absorption region at a wavelength of 800 nm to 900 nm. The transparent card is characterized in that the transparent oversheet is laminated on the coated surface side or an overcoat is applied.

  In the said transparent card | curd, it is set as the ink for silkscreen printing which contains the infrared absorber containing printing ink which has a maximum absorption range in wavelength 800nm-900nm in the range of 2.0 mass%-3.5 mass% of phthalocyanine type compounds. Infrared absorbent-containing printing ink having a maximum absorption range at a wavelength of 1000 nm or more, silk screen printing ink containing an immonium salt compound in a range of 2.0% by mass to 3.5% by mass, and can do.

  Sixth of the gist of the present invention is that an infrared absorbent-containing printing ink having a maximum absorption range at a wavelength of 800 nm to 900 nm is applied to one surface of the transparent core sheet, and a wavelength of 1000 nm is applied to the other surface of the transparent core sheet. After coating infrared absorbent containing printing ink having a maximum absorption range in the region of ~ 1150 nm, a transparent oversheet is laminated on both infrared absorbent containing printing ink coated surfaces of the core sheet, and the pressure is integrated by hot pressing. The present invention relates to a method for producing a transparent card, characterized in that a card substrate is used.

  Seventh of the gist of the present invention is that after the infrared absorbent-containing printing ink having the maximum absorption range at a wavelength of 800 nm to 900 nm is applied to the surface of 1 of the transparent core sheet, the wavelength of 1000 nm to 1150 nm is applied to the ink coating surface. After further coating with the infrared absorbing agent-containing printing ink having the maximum absorption region in the area of the transparent core sheet, a transparent oversheet is applied to the infrared ink-containing printing ink coating surface of the transparent core sheet and the printing ink non-coating surface of the transparent core sheet. A method for producing a transparent card, characterized by laminating and hot pressing to form an integral card substrate.

  In the method for producing a transparent card, silk screen printing in which an infrared absorbent-containing printing ink having a maximum absorption region in a wavelength range of 800 nm to 900 nm contains a phthalocyanine compound in a range of 2.0 to 3.5% by mass. Infrared absorbent-containing printing ink having a maximum absorption range in the wavelength range of 1000 nm to 1150 nm, the immonium salt-based compound in the range of 2.0 to 3.5% by mass It can also be made to be a silk screen printing ink contained in

The transparent card of the present invention has a visual effect called a skeleton because the unprinted portion of the card is transparent. However, it actually has an infrared absorption effect, and has the characteristics and effects of satisfying international or domestic standards and being machine-readable.
In the transparent card of the present invention, since the coated part of the infrared absorbent-containing printing ink is provided between the oversheet and the core sheet, the coated part is worn during use of the card, and the infrared absorption effect is gradually increased. There is no decrease.
As in the transparent card according to the first and third aspects of the present invention, even when the infrared absorbent-containing printing ink is applied over the entire surface, a sufficient visual transparency that is not found in conventional cards can be obtained.
In the method for producing a transparent card of the present invention, since an infrared absorption effect can be provided by printing ink on the transparent substrate of the card, there is a problem that it takes time to arrange materials so as to use a substrate kneaded with an infrared absorber. Absent.

Since the transparent card of the present invention is roughly classified into four types of embodiments, the embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a layer configuration of the first embodiment of the transparent card of the present invention, FIG. 2 is a diagram showing a layer configuration of the second embodiment, and FIG. 3 is a layer configuration of the third embodiment. 4 is a diagram showing a layer configuration of the fourth embodiment, FIG. 5 is a plan view of the transparent card of the second embodiment, and FIG. 6 is a diagram showing a spectral transmittance curve of each infrared absorbing ink. 7 is a chart in which the spectral transmittance of the transparent card of the present invention is measured, FIG. 8 is a chart in which the spectral transmittance of “A ink” is measured according to a change in the amount of added infrared absorber, and FIG. FIG. 10 is a chart measuring the spectral transmittance of “A ink” and “B ink” overprinting, and FIG. 11 is a chart of a conventional transparent card. It is the chart which measured the spectral transmittance.
1A shows a state before hot-pressing the card substrate, and FIG. 1B shows a state after pressing. 2A and 2B have the same relationship. 3 and 4 show only the state after pressing.

As shown in FIG. 1, the first embodiment of the transparent card of the present invention has transparent core sheets 11 and 12 as a central layer, and transparent oversheets 13 and 14 are laminated on both surfaces thereof. The transparent oversheets 13 and 14 carry the magnetic tapes 5 and 6 and serve to protect the print layer and the infrared absorber coating layer. It may be. The same applies to the second embodiment.
Further, although the transparent core sheet is shown in a state where two sheets are used, a single layer sheet corresponding to the total thickness of the two sheets may be used. If printing on the front and back of the card (ordinary printing other than infrared) is effected in the process, it is often the case that two core sheets are used.
In addition, a transparent core sheet and a transparent oversheet mean a highly transparent resin sheet.

In FIG. 1 (A), the entire surface printing 2a is performed on the surface of the transparent oversheet 13 of the transparent core sheet 11 with one infrared absorbing material-containing printing ink (referred to as “A ink” for convenience). Similarly, on the surface side of the transparent oversheet 14 of the transparent core sheet 12, full-surface printing 2 b is performed with another infrared absorbing material-containing printing ink (referred to as “B ink” for convenience). The contents of “A ink” and “B ink” will be described later.
Although the magnetic tapes 5 and 6 are transferred to the oversheets 13 and 14, it is not essential to provide both magnetic tapes. Further, a magnetic tape without any magnetic tape is also included in the scope of the present invention.

  Normally, the surface on which the card issuer and the card user name are displayed is called the card surface, and another printed pattern 8 is provided on the card surface side. This is concealment printing for hiding the magnetic tape 5, a decorative design, or the like. In the case of FIG. 1A, a state in which the pattern 8 is transferred by the transfer paper 7 is shown, but it may be printed directly.

FIG. 1B shows a state after the card base is hot-pressed. The base substrate 7 f itself of the transfer paper 7 is peeled and removed, and only the pattern 8 is transferred to the oversheet 13.
When the card base material is self-bonding, it is bonded by hot pressing, but when it is a material that is not self-bonding, such as polyethylene terephthalate (PET), it is bonded together using an adhesive or an adhesive tape. Therefore, it is necessary to consider the heat-fusibility in the case of “A ink” and “B ink” of the ink containing the infrared absorber.

The second embodiment of the transparent card of the present invention is different in that “A ink” and “B ink” are partially coated as shown in FIG. This coated portion is a light transmittance measurement area of the card mainly defined by JISX6305. This is because, in this region, a characteristic that has visual transparency and does not transmit infrared rays is required. In addition, it is not limited to coating the entire area. This is because other pattern printing inks may be used.
Since the central area of the card that is not a light-transmitting measurement area is not measured, in order to be transparent, it is sufficient to leave the substrate in a transparent state without printing, but for the continuity of the pattern, the central area The transparent infrared shading pattern may be printed over.

A plan view of the transparent card of the second embodiment is as shown in FIG. The light transmittance measurement area of the card is an area A1 of 21.0 mm from the upper edge of the card and an area A2 of 10.0 mm from the lower edge defined by JISX6305 as described above.
The intermediate area between the area A1 and the area A2 is outside the light transmittance regulation area, but is an area where emboss information is stamped, an IC module is mounted, or a signature panel is formed. If all the elements are incorporated, the transparent areas are eroded.
Since the area A1 and the area A2 are considerably large areas, there is a problem that if the whole area is printed with white ink or the like, it cannot be said to be a transparent card.

Accordingly, the transparent infrared light shielding pattern 3 by the front and back overprinting of the “A ink” and “B ink” of the ink containing the infrared absorbent is mainly printed in the area A1 or the area A2, but from the area A1 or the area A2 to the center of the card. It may span a region. A pattern 8 and a background pattern 9 by the transfer paper 7 are also provided, but many transparent areas are left.
A portion with a slanted line in the belt shape is a portion in which the magnetic tape 5 on the surface side is embedded, and the embedded position is defined. As shown in FIG. 1, the magnetic tape 6 may be put on the back side of the card.
The transparent card 1 is not limited to a magnetic card, but may be an IC card having IC module contact terminals 4. Further, it may be a contact / non-contact IC card further having an antenna coil embedded in the card base.

The same applies to the first embodiment, but either “A ink” or “B ink” may be used on the front side of the card or on the back side of the card. This is because the light transmitted through both the coating layers of “A ink” and “B ink” only needs to have a predetermined transmittance.
As in the first embodiment, the advantage of coating on the entire surface of the card is that a transparent card substrate that has been coated in advance can be prepared regardless of the card print design. On the other hand, a slightly problematic point is that the light transmitted or reflected through the infrared shading layer ("A ink" or "B ink" layer) appears colored pale yellowish green when viewed from the back of the card. It is.
When coating partially as in the second embodiment, the yellow-green coloring problem is not noticeable, but it is necessary to perform a different coating process for each item.

  As described above, the JISX 6305 defines the light transmission measurement area of the card, but the area actually measured by the sensor is not necessarily unified, and the measurement position is often changed by the user. Accordingly, it is desirable to use a card that is transparent in visual appearance and has infrared absorption characteristics at any part of the card when measured by a sensor.

The third and fourth embodiments of the transparent card of the present invention are forms that should be referred to as modifications of the first and second embodiments, respectively.
That is, in the third embodiment, as shown in FIG. 3, “A ink” and “B ink” are applied to one surface of the transparent core sheet 11 on the oversheet lamination side so as to overlap the entire surface. Either “A ink” or “B ink” may be on the transparent core sheet 11 side.
In the fourth embodiment, as shown in FIG. 4, “A ink” and “B ink” are partially overlapped on one surface of the transparent core sheet 11 on the oversheet lamination side. . This coating area is a light transmittance measurement area of the card defined by JISX6305 as described above. Either “A ink” or “B ink” may be on the transparent core sheet 11 side.

As described above, in each embodiment of the transparent card 1 of the present invention, the coating layer of the infrared absorbent-containing printing ink is coated with the oversheet or the overcoat. There is no problem that the infrared ray shielding effect is reduced by wear.
In general, it is necessary to prepare a large amount of a base material to knead an infrared absorber into a base material. However, in the transparent card of the present invention, an optional base material is required as necessary depending on the order quantity. There is convenience that can be used by coating the amount.

Here, the contents of “A ink” and “B ink” will be described with reference to FIG.
FIG. 6 shows the spectral transmittance curves of “A ink” and “B ink”, but for reference, the spectral transmittance curve of “C ink” that is conventionally used is also shown. In all cases, the ink is made into silk screen printing ink under the same conditions as in the examples described later, and after printing on the core sheet, the core sheet and the oversheet are integrated by hot-pressing and forming a transparent card. It is a measurement of. The measurement is performed using a spectrophotometer manufactured by Shimadzu Corporation. In addition, you may consider that there is no absorption by a card | curd base material.

“A ink” is an ink for silk screen printing by adding 4.0% (mass ratio) of an infrared absorber “YKR-5010” (phthalocyanine compound) manufactured by Yamamoto Kasei Co., Ltd. to a vinyl resin and a solvent. Ink. In FIG. 6, “A ink” indicates a spectral transmittance curve of curve A, and the maximum absorption wavelength region is recognized in the range of 800 nm to 900 nm.
"B-ink" is a silk screen made by adding 3.0% (mass ratio) of infrared absorber "CIR-1085" (Immonium salt) manufactured by Nippon Carlit Co., Ltd. to vinyl resin and solvent. Ink is made into printing ink. “B ink” shows a spectral transmittance curve of curve B, and the maximum absorption wavelength region is recognized in a wavelength region of 1000 nm or more, but it is not clear which point is the maximum absorption wavelength.
“C ink” is an ink for silk screen printing by adding 8.0% (mass ratio) of an infrared absorber “YKR-3080” (phthalocyanine compound) manufactured by Yamamoto Kasei Co., Ltd. to a vinyl resin and a solvent. Ink. “C ink” shows a spectral transmittance curve of curve C, and the maximum absorption wavelength region is recognized in the range of 1000 nm to 1050 nm.

It is recognized that “A ink”, “B ink”, and “C ink” all show a considerable transmittance in the visible wavelength region (approximately 400 to 760 nm). The transmittance of “B ink” is particularly excellent. Moreover, although the transmittance of any ink decreases in the near infrared of 800 nm to 1000 nm, “A ink” and “C ink” tend to have a significantly increased transmittance when exceeding 1050 nm.
In the above-mentioned application of Patent Document 3, “A ink” and “C ink” are mixed and used. However, when the wavelength exceeds 1050 nm, the transmittance increases, and an infrared sensor having a detection wavelength in this region cannot be used. There's a problem.

  Therefore, in the present invention, “B ink” is used instead of “C ink”. In the present invention, “A ink” and “B ink” can be mixed in advance and converted into a single color printing ink. However, due to mutual interference, printing is performed for each “A ink” and “B ink”. Compared with the case where it does, the tendency for the infrared absorption effect to fall was recognized. Therefore, the gist of the present invention is to print without mixing.

In the above, the immonium salt specifically has the chemical formula C ₆₆ H ₉₂ N ₈ F ₁₂ O ₈ S ₄ , and the chemical name is N, N, N ′, N′-tetrakis (p- Dibutylaminophenyl) -p-phenylenediamine-bis (bis (trifluoromethanesulfonyl) imidic acid) immonium salt. It is said that the human body does not contain hazardous components and has little impact on the environment.

Materials for the transparent core sheet and transparent oversheet include polyvinyl chloride, PET-G (copolymerized polyester resin in which a part of the ethylene glycol component in polyethylene terephthalate is substituted with cyclohexanedimethanol), and acrylonitrile-butadiene-styrene copolymer. A highly transparent resin such as resin (ABS), polypropylene, or triacetate can be used.
The thickness of the transparent core sheet is about 0.54 to 0.65 mm in the case of a single layer, and about 0.27 to 0.30 mm in the case of two layers. However, since the entire thickness of the transparent card is set to about 0.76 to 0.80 mm defined by ISO, the thickness varies depending on the thickness of the oversheet to be used.

  Binders (resins) for converting infrared absorbers into silk screen printing inks include vinyl chloride / vinyl acetate copolymers, vinyl chloride / vinyl acetate / vinyl alcohol copolymers, and vinyl chloride / vinyl acetate / maleic. Various resins such as an acid copolymer, a fiber-based resin, an acrylic resin, a vinyl chloride / acrylate copolymer, and a bisphenol A type epoxy resin can be used. The higher the amount of the infrared absorber added, the more effective the infrared rays are absorbed. Therefore, the upper limit cannot be set in particular. However, considering the economical efficiency and difficulty in making ink, the limit is about 15 to 20%. It is done. In the case of silk screen printing, the coating is applied to a thickness of about 5 to 15 μm.

FIG. 8 is a chart in which the spectral transmittance of “A ink” according to a change in the amount of added infrared absorber is measured, FIG. 9 is a chart in which the spectral transmittance of “B ink” is measured, and FIG. And “B ink” are charts obtained by measuring the spectral transmittance of overprinting.
Each “A ink” is an ink made into an ink for silk screen printing by adding an infrared absorber “YKR-5010” (phthalocyanine compound) manufactured by Yamamoto Kasei Co., Ltd. to a vinyl resin and a solvent. , "B ink" is an ink made into an ink for silk screen printing by adding an infrared absorber "CIR-1085" (Immonium salt) made by Nippon Carlit Co., Ltd. to vinyl resin and solvent. It is.

  In either case, the ink was made into silk screen printing ink under substantially the same conditions as in the examples described later, and FIGS. 8 and 9 were printed on the core sheet, and FIG. Measured in a state after being pressed and integrated into a transparent card. The measurement is performed using a spectrophotometer manufactured by Shimadzu Corporation. In addition, you may consider that there is no absorption by a card | curd base material.

Both FIG. 8 and FIG. 9 are monochrome printing by 200 mesh silk screen printing although the amount of addition of the infrared absorber is 2.0%, 2.5%, 3.0%, 3.5%. 9 to 10 μm. FIG. 10 shows overprinting under the same conditions with the same composition.
The maximum absorption wavelength range of “A ink” is recognized to be in the range of 800 nm to 900 nm, and the maximum absorption wavelength range of “B ink” is recognized to be in the range of 1000 nm to 1150 nm, which point is the maximum absorption wavelength. Is not clear.

In the overprinting of FIG. 10, in the overprinting (T1) with the addition amount of 2.0%, the transmittance range exceeding 60% is continuously provided at the wavelength of 550 nm to 600 nm, and the overprinting of 2.5% (T2). ) Also exceeds 60%. With overprinting (T4) of 3.5%, a transmittance of approximately 50% or more is obtained in the wavelength range of 550 nm to 600 nm. Further, in the wavelength range of 800 nm to 1150 nm, all have a transmittance of 5% or less.
Therefore, it is recognized that the addition amount of 2.0% to 3.5% is an almost optimum addition amount. However, from the results of Examples to be described later, it can be confirmed that a practical transparent card can be obtained even if this range is slightly exceeded or even if the addition amount is small.

  Embodiments of the present invention will be described together with comparative examples with reference to FIGS.

(Preparation of infrared absorbent-containing printing ink "A ink")
As an infrared absorber A, a phthalocyanine compound “YKR-5010” manufactured by Yamamoto Kasei Co., Ltd. is used, mixed with a clear ink “VAHS medium” manufactured by Showa Ink Co., Ltd. together with “Hayaguchi Solvent”, and stirred. It was converted into ink for screen printing. Its composition is as follows.
<Composition of infrared absorbent-containing printing ink "A ink">
Infrared absorbent A 1 part by mass VAHS medium 54.2 parts by mass Fast-opening solvent 7.2 parts by mass (In the state of screen ink, the ratio of infrared absorbent A is 1.6% by mass)

  The “VAHS medium” is vinyl chloride / vinyl acetate / vinyl alcohol copolymer: 20 to 25% by mass, vinyl chloride / vinyl acetate / maleic acid copolymer: 5% by mass or less, cyclohexanone: 40 to 45% by mass. , Aromatic hydrocarbon mixture: 30 to 35% by mass. The composition of the “VAHS medium” takes into consideration the fusion property during hot pressing. The “quick solvent” is composed of xylene (including ethylbenzene): 55 to 65 mass%, cyclohexanone: 35 to 45 mass%.

(Preparation of infrared absorbent-containing printing ink "B ink")
As an infrared absorber B, an immonium salt compound “CIR-1085” manufactured by Nippon Carlit Co., Ltd. is used, mixed with a transparent ink “VAHS medium” manufactured by Showa Ink Co., Ltd. together with a solvent methyl ethyl ketone, and stirred. Inked into printing ink. Its composition is as follows.
<Composition of infrared absorbent-containing printing ink "B ink">
Infrared absorber B 1 part by mass VAHS medium 30 parts by mass Methyl ethyl ketone (MEK) 10 parts by mass (In the state of screen ink, the proportion of infrared absorber B is 2.4% by mass)

(Printing of infrared ink containing printing ink on core sheet)
As transparent core sheets 11 and 12, two transparent PETG (non-crystalline PET copolymer) base materials ("Diafix PG-SK2" manufactured by Mitsubishi Plastics, Inc.) having a thickness of 0.28 mm are used. An alloy sheet made of polycarbonate (PC) and a copolyester having a thickness of 0.10 mm (“Diafix PG-MCT” manufactured by Mitsubishi Plastics, Inc.) was used (see FIG. 1A). The oversheets 13 and 14 have the magnetic tapes 5 and 6 temporarily pasted and transferred.

After printing the registration marks for positioning the magnetic stripe on the surface of the core sheet 11, the previously prepared infrared absorbent-containing printing ink “A ink” was printed by silk screen printing using the above-mentioned fast solvent (hereinafter, this The surface is also called “surface”.) The thickness of the infrared shielding A ink layer after drying was 9 μm.
Characters were printed on one side of the core sheet 12, and the previously prepared infrared absorbent-containing printing ink “B ink” was printed by silk screen printing using the solvent MEK (hereinafter, this side is also referred to as “back side”). ). The thickness of the infrared shielding B ink layer after drying was 9 μm.
The non-printing surfaces of the core sheet were used as surfaces to be fused later.
In addition, since it was a test card | curd, the part which can measure "A ink" and "B ink" by a single layer was left in a part of transparent card | curd.

The oversheets 13 and 14 are aligned with the registration marks of the core sheet as a reference, overlapped on the front and back surfaces of the card, and the transfer paper 7 on which the concealing layer by screen printing and the offset printing pattern 8 have been printed is applied to the surface of the oversheet 13 Then, the whole was sandwiched between mirror plates made of chrome-plated steel plates and hot-pressed (120 ° C, 38.4 kgf / cm ² , 120 seconds) to form an integrated card base (see FIG. 1 (B)). Thereafter, the base film 7f of the transfer paper was peeled and removed.

About the completed transparent card | curd of Example 1, the spectral transmittance was measured using the said spectrophotometer. The result is shown in FIG.
The spectral transmittance curve of the transparent card of the present invention coated with both “A ink” and “B ink” is indicated by a broken line T1 in FIG. The portion of the “A ink” single layer is indicated by a solid line A, and the portion of the “B ink” single layer is indicated by a solid line B. From this result, in the state of screen ink, the ratio of the infrared absorber A may be 1.6% by mass.
As indicated by the broken line T1, in the region of wavelength of 800 nm or more, the transmittance is approximately 5.0% or less, indicating good infrared light shielding characteristics. Moreover, the transmittance | permeability exceeding 60% is partially shown in the specific wavelength of the wavelength range of 550 nm to 600 nm in the visible light region, and the transmittance exceeding 50% is continuously observed in the region of wavelength 550 nm to 600 nm.

(Preparation of infrared absorbent-containing printing ink "A ink")
As an infrared absorber A, an ink obtained by mixing a phthalocyanine compound “YKR-5010” manufactured by Yamamoto Kasei Co., Ltd. with “VAHS medium” manufactured by Showa Ink Co., Ltd. and a transparent ink “VAHS medium” manufactured by Showa Ink Co., Ltd. Was mixed with “slow solvent” and stirred to make an ink into silk screen printing ink. Its composition is as follows.

<Composition of infrared absorbent-containing printing ink "A ink">
VAHS (Infrared Absorber A (with 20%)) 95.4g
VAHS Medium 359.6g
Slow mouth solvent 45.5g
Total amount of ink + solvent 500.5g
(In the state of screen ink, the proportion of infrared absorber A is 3.8% by mass.)

  The composition of “VAHS medium” is the same as in Example 1. The “slow solvent” is composed of xylene (including ethylbenzene): 35 to 45% by mass and cyclohexanone: 55 to 65% by mass.

(Preparation of infrared absorbent-containing printing ink "B ink")
As an infrared absorber B, an ink obtained by mixing an immonium salt compound “CIR-1085” manufactured by Nippon Carlit Co., Ltd. with “VAHS Medium” manufactured by Showa Ink Co., Ltd. and a transparent ink “VAHS Medium” manufactured by Showa Ink Co., Ltd. Were mixed with the solvent methyl ethyl ketone and stirred to make ink into silk screen printing ink. Its composition is as follows.

<Composition of infrared absorbent-containing printing ink "B ink">
VAHS (Infrared Absorber B (with 5%)) 350.0g
VAHS medium 112.5g
Methyl ethyl ketone (MEK) 37.5g
Total amount of ink + solvent 500.0g
(In the state of the screen ink, the proportion of the infrared absorbent B is 3.5% by mass.)

(Printing of infrared ink containing printing ink on core sheet)
As transparent core sheets 11 and 12, two transparent PETG (amorphous PET copolymer) base materials ("Diafix PG-SK2" manufactured by Mitsubishi Plastics, Inc.) having a thickness of 0.28 mm are used. An alloy sheet (“Diafix PG-MCT” manufactured by Mitsubishi Plastics, Inc.) made of polycarbonate (PC) having a thickness of 0.10 mm and a copolymerized polyester was used (see FIG. 1A). The oversheets 13 and 14 have the magnetic tapes 5 and 6 temporarily pasted and transferred.

  After printing a registration mark for positioning the magnetic stripe on the surface of the core sheet 11, the entire surface is printed by 200 mesh silk screen printing with the previously prepared infrared absorbent-containing printing ink "A ink" using the slow-release solvent. did. The thickness of the infrared shielding A ink layer after drying was 10 μm. Subsequently, the infrared absorbent-containing printing ink “B ink” previously prepared on the “A ink” printed surface of the core sheet 11 was printed by 200-mesh silk screen printing using the solvent MEK. The thickness of the infrared shielding B ink layer after drying was 9 μm.

The core sheet 12 and the oversheets 13 and 14 are aligned with respect to the registration mark of the core sheet, and are superimposed on the front and back surfaces of the card. Is placed on the surface side of the oversheet 13 and the whole is sandwiched between mirror plates made of chrome-plated steel plates and hot-pressed (120 ° C, 38.4 kgf / cm ² , 120 seconds) to form an integrated card. A substrate was formed (see FIG. 3). Thereafter, the base film 7f of the transfer paper was peeled and removed.

  About the transparent card | curd of the completed Example, the spectral transmission factor was measured using the said spectrophotometer. As a result, a curve T4 in FIG. 10 was obtained.

(Comparative example)
(Preparation of printing ink containing infrared absorber)
Infrared absorbent A, infrared absorbent C, and “quick solvent” were mixed and stirred into the “VAHS medium”, and ink was made into silk screen printing ink. Its composition is as follows. The infrared absorber C refers to an infrared absorber “YKR-3080” (phthalocyanine compound) manufactured by Yamamoto Kasei Co., Ltd.

<Infrared absorber-containing printing ink composition>
Infrared absorbent A 15 parts by mass Infrared absorbent C 50 parts by mass VAHS medium 570 parts by mass

  The contents of “VAHS medium” and “fast solvent” are the same as those in the example. In the above composition, the proportion of the infrared absorber A is 2.3 mass%, and the proportion of the infrared absorber C is 7.7 mass%.

The same card substrate as that used in the example was used, and printing was performed on the entire surface of the core sheet 11 using the above-described infrared absorbent-containing printing ink. The thickness of the dried infrared absorber (A + C mixed) ink layer was 16 μm. Thereafter, the core sheet 12, the oversheets 13 and 14, and the transfer paper 7 were integrated under the same conditions as in the example, and hot-pressed under the same conditions as in the example to complete the transparent card of the comparative example.
About the completed transparent card | curd of the comparative example, the spectral transmittance was measured using the said spectrophotometer. The result is as shown in FIG.

The spectral transmittance curve of the transparent card of the comparative example using a mixture of “infrared absorber A” and “infrared absorber C” is indicated by a broken line T2 in FIG.
As indicated by the broken line T2, the transmittance is approximately 5% or less in the wavelength range of 800 nm to 1000 nm, but the transmittance is increased above 1000 nm. Further, the visible light region has a transmittance slightly exceeding 40% in a part of the region having a wavelength of 550 nm to 600 nm, but does not have a transmittance exceeding 50%. For this reason, when the card is visually recognized, it becomes a translucent state.

The print area of the “infrared absorbent A” with the single ink and the print area of the “infrared absorbent C” with the single ink cannot be obtained with the transparent card of the comparative example. The curves are shown by a solid line A and an alternate long and short dash line C in FIG.
The single ink of “infrared absorber A” uses the same “VAHS medium” and “fast solvent” as in the examples, so that the ratio of infrared absorber A in the printing ink is 3.0% by mass. In the same manner, the single ink of “infrared absorbent C” is adjusted so that the ratio of the infrared absorbent C is 10.0% by mass.

  As is clear from the above examples and comparative examples, in the examples, the light transmittance in the visible light region is superior to the transparent card of the comparative example, which is a conventional example, and thereby a transparent card with excellent visual transparency. Can be realized. Further, in the infrared region, the infrared transmittance is not increased by 5.0% or more in the wavelength range of 800 nm to 1150 nm, and it is clear that any infrared sensor can be handled.

It is a figure which shows the layer structure of 1st Embodiment of the transparent card | curd of this invention. It is a figure which shows the layer structure of 2nd Embodiment. It is a figure which shows the layer structure of the same 3rd Embodiment. It is a figure which shows the layer structure of the same 4th Embodiment. It is a top view of the transparent card of a 2nd embodiment. It is a figure which shows the spectral transmittance curve of each infrared rays absorption ink. It is the chart which measured the spectral transmittance of the transparent card of the present invention. It is the chart which measured the spectral transmittance of "A ink" by change of the amount of addition of an infrared absorber. It is the chart which measured the spectral transmittance of "B ink" by change of the amount of addition of an infrared absorber. It is the chart which measured the spectral transmittance of "A ink" and "B ink" overprinting. It is the chart which measured the spectral transmittance of the conventional transparent card | curd.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transparent card 2a, 2b Full-surface printing with infrared absorbing material containing printing ink 3 Transparent infrared light shielding pattern 3a, 3b Pattern printing with infrared absorbing material containing printing ink 4 IC module contact terminal 5,6 Magnetic tape 7 Transfer paper 8 Picture 9 Background pattern 11,12 Transparent core sheet 13,14 Transparent oversheet

Claims (15)

It consists of a card in which a transparent oversheet is laminated on the outer surface of a transparent core sheet, and an infrared absorbent-containing printing ink having a maximum absorption range at a wavelength of 800 nm to 900 nm is coated on the entire surface of one of the transparent core sheets, A transparent card characterized in that the other surface of the sheet is coated with an infrared absorbent-containing printing ink having a maximum absorption range in a wavelength region of 1000 nm or more, and the transparent oversheet is laminated on the coated surface side. . It consists of a card in which a transparent oversheet is laminated on the outer surface of a transparent core sheet, and an infrared absorbent-containing printing ink having a maximum absorption range at a wavelength of 800 nm to 900 nm is applied to one surface of the transparent core sheet, and the other surface of the transparent core sheet In addition, an infrared absorber-containing printing ink having a maximum absorption range at a wavelength of 1000 nm or more is applied so that both coating positions overlap at least a part of the light transmission measurement region of the card specified by JISX6305. The transparent card | curd characterized by laminating | stacking the said transparent oversheet on the said coating surface side. It consists of a card in which a transparent oversheet is laminated on the outer surface of the transparent core sheet. On the surface of one of the transparent core sheets, an infrared absorbent-containing printing ink having a maximum absorption range at a wavelength of 800 nm to 900 nm and a maximum at a wavelength of 1000 nm or more. A transparent card comprising an infrared absorber-containing printing ink having an absorption region, which is applied over the entire surface, and the transparent oversheet is laminated on the coated surface side. It consists of a card in which a transparent oversheet is laminated on the outer surface of the transparent core sheet. On the surface of one of the transparent core sheets, an infrared absorbent-containing printing ink having a maximum absorption range at a wavelength of 800 nm to 900 nm and a maximum at a wavelength of 1000 nm or more. Infrared absorbent-containing printing ink having an absorption region is applied so that both coating positions overlap at least part of the light transmittance measurement region of the card specified by JISX6305, and the transparent surface is coated with the transparent A transparent card characterized by laminating oversheets. When the spectral transmittances of both infrared absorber-containing printing ink coating portions are measured, a portion having a spectral transmittance of 60% or more is present in a wavelength region of 550 nm to 600 nm. The transparent card according to claim 1. When the spectral transmittance of both infrared absorbing agent-containing printing ink coating portions is measured, a portion having a spectral transmittance of 50% or more is continuously provided in a wavelength region of 550 nm to 600 nm. The transparent card according to any one of claims 1 to 4. The spectral transmittance measured by a spectrophotometer over a wavelength range of 800 nm to 1150 nm in a light transmittance measurement region of a card defined by JIS X6305 is 5.0% or less, wherein any one of claims 1 to 4 is characterized. The transparent card according to claim 1. The transparent core sheet is composed of a two-layer core sheet, and a transparent oversheet laminated surface of one transparent core sheet is coated with an infrared absorbent-containing printing ink having a maximum absorption range at a wavelength of 800 nm to 900 nm. The infrared absorber-containing printing ink having a maximum absorption region in a wavelength region of 1000 nm or more is applied to the transparent oversheet laminated surface of the transparent core sheet. The transparent card according to item. Infrared absorbent-containing printing ink having a maximum absorption region in a wavelength region of 1000 nm or more on one surface of the transparent core sheet, comprising a card having a transparent oversheet laminated or coated with an overcoat on the outer surface of the transparent core sheet. The entire surface or part of the coating is applied, and the other one surface of the transparent core sheet is coated with the infrared absorbent-containing printing ink having the maximum absorption range at a wavelength of 800 nm to 900 nm on the whole or part thereof, and the coated surface side A transparent card, wherein the transparent oversheet is laminated or an overcoat is applied thereto. The infrared absorber-containing printing ink having a maximum absorption range at a wavelength of 800 nm to 900 nm is a silk screen printing ink containing a phthalocyanine compound in a range of 2.0% by mass to 3.5% by mass. The transparent card according to any one of claims 1 to 9. The infrared absorber-containing printing ink having a maximum absorption region in a wavelength region of 1000 nm or more is an ink for silk screen printing containing an immonium salt compound in a range of 2.0% by mass to 3.5% by mass. The transparent card according to claim 1, wherein the transparent card is a card. An infrared absorbent-containing printing ink having a maximum absorption range at a wavelength of 800 nm to 900 nm is applied to one surface of the transparent core sheet, and a maximum absorption range is set to a wavelength range of 1000 nm to 1150 nm on the other surface of the transparent core sheet. After coating with the infrared absorbent containing printing ink having, a transparent oversheet is laminated on both sides of the infrared absorbent containing printing ink coated surface of the core sheet, and hot-pressing into an integrated card substrate A method for producing a transparent card. An infrared absorber-containing printing ink having a maximum absorption range at a wavelength of 800 nm to 900 nm is applied to the surface of 1 of the transparent core sheet, and then the infrared ray having a maximum absorption range at a wavelength range of 1000 nm to 1150 nm is applied to the ink coating surface. After further coating with absorbent-containing printing ink, a transparent oversheet is laminated on the coated surface of the transparent core sheet with the infrared absorbent-containing printing ink and the non-printed surface of the transparent core sheet. A method for producing a transparent card, characterized in that a card substrate is used. The infrared absorbent-containing printing ink having a maximum absorption range in the wavelength range of 800 nm to 900 nm is a silk screen printing ink containing a phthalocyanine compound in a range of 2.0 to 3.5% by mass. The method for producing a transparent card according to claim 12 or 13. The infrared absorber-containing printing ink having a maximum absorption range in the wavelength range of 1000 nm to 1150 nm is an ink for silk screen printing containing an immonium salt compound in a range of 2.0 to 3.5% by mass. The method for producing a transparent card according to claim 12 or 13, characterized in that the transparent card is produced.

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