JP3438452B2 - Antibacterial card - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cards such as cash cards, members' cards, credit cards, and medical examination cards, and more particularly to cards with an antibacterial function.

[0002]

2. Description of the Related Art As a card of this type, for example, a card base material made of a synthetic resin such as polyvinyl chloride, a magnetic stripe provided at an arbitrary portion of the card body, and a front surface side and a back surface side of the card base material. It is known that an outermost surface layer or outermost surface layer formed of a coating layer or a resin layer provided on the side of the main part is constituted, and the above-mentioned various names are given according to the use.

In recent years, cards have come to be used in medical institutions such as hospitals, and there is a concern that the causative bacteria of infectious diseases such as methicillin-resistant Staphylococcus aureus may be transmitted through the cards. It was Therefore, an antibacterial card using an antibacterial agent containing silver as an active ingredient (silver-based antibacterial agent) has been developed and used. Usually, the silver-based antibacterial agent is added to the coating layer or the resin layer provided on the front surface side and the back surface side of the card substrate.

[0004]

As described above, although a card containing a silver-based antibacterial agent has an antibacterial function, it may be discolored by light or depending on the manufacturing method and material composition of the card.
May not have sufficient antibacterial function.

The present invention has been made by paying attention to such problems, and its problem is that the card itself does not have a complicated structure, is not discolored, and is manufactured by any manufacturing method and material. The purpose is to provide cards with antibacterial functions.

[0006]

In the antibacterial card according to claim 1, at least one of the outermost surface layer and the outermost surface layer of the card has an organic antibacterial agent in a phosphate having a layered structure. 0.1 to 10% by weight of the retained antibacterial powder,
Preferably, the resin layer is kneaded at a compounding ratio of 0.2 to 0.5% by weight .

A detailed description will be given below with reference to the drawings. Figure 1
(A)-(B) respectively show the top view of the antibacterial card which materialized the invention of Claim 1, and its BB sectional drawing. That is, the antibacterial card 1 includes a card substrate 11 made of a white polyvinyl chloride resin, a printed layer 12 provided on the front and back surfaces of the card substrate 11, and a printed layer 12 of the printed layer 12.
Resin layers (outermost surface layer and outermost surface layer) 13 and 14 in which an antibacterial powder in which an organic antibacterial agent is held in a phosphate having a layered structure are kneaded are laminated on the outermost surface side and the rear surface side of There is.

Here, the resin layer prepared by kneading an antibacterial powder in which an organic antibacterial agent is held in a phosphate having a layered structure will be described in detail.

Examples of the organic antibacterial agents include quaternary ammonium ions obtained by ionizing a quaternary ammonium salt having an antibacterial function (claim 4). The quaternary ammonium ion is a monovalent cation in which four carbon bonds are directly bonded to a nitrogen atom, and examples thereof include alkyltrimethylammonium ion, dialkyldimethylammonium ion, alkyldimethylbenzylammonium ion, alkylpyridinium ion. And the like, and compounds having an alkyl group having 8 to 18 carbon atoms. Among them, alkyldimethylbenzylammonium ion (also known as benzalkonium ion) and alkylpyridinium ion are preferable from the viewpoint of antibacterial property. Furthermore, examples of other organic antibacterial agents include thiazole compounds.

The phosphate having a layered structure is represented by the general formula M (HPO ₄ ) ₂ .nH ₂ O (where M is trivalent or tetravalent).
It is a valent metal and n = 0 to 2). Specifically, zirconium phosphate, titanium phosphate, aluminum phosphate, aluminum tripolyphosphate and the like can be mentioned. Among them, aluminum tripolyphosphate is preferable. Incidentally, two or more kinds of phosphates may be mixed and used.

By stirring such a phosphate together with an organic antibacterial agent in a solution, a hydrogen phosphate group (HPO ₄
Ion exchange occurs between the protons of ^2- ) and the quaternary ammonium ions, etc., and an antibacterial powder in which a phosphate having a layered structure holds an organic antibacterial agent between the layers is obtained. Since this phosphate firmly holds the organic antibacterial agent, the antibacterial function lasts as compared with the case where the organic antibacterial agent is used alone. Further, the antibacterial function is superior to that of the antibacterial zeolite which also has the antibacterial function.

Then, the above antibacterial powder is mixed with vinyl chloride,
0.1 wt% to thermoplastic resin such as vinyl acetate
10% by weight, more preferably 1% by weight to 5% by weight is added and kneaded, and the mixture is extruded into a film to obtain a resin layer in which an antibacterial powder holding an organic antibacterial agent in a phosphate having a layered structure is kneaded. be able to.

Although the magnetic stripe 15 is embedded in the resin layer in FIG.
No. 5 has no antibacterial function. Therefore, in a preferred embodiment, it is desirable that the magnetic layer forming the magnetic stripe 15 contains antibacterial powder. The magnetic stripe is usually composed of a magnetic layer made of magnetic powder and a binder and a strip-shaped film supporting the magnetic layer. However, the antibacterial powder may be dispersed together with the magnetic powder in the magnetic layer. Further, a magnetic stripe not having the above-mentioned strip-shaped film can be applied, and in this case as well, a configuration may be adopted in which the magnetic powder and the antibacterial powder are dispersed in the magnetic layer.

In the present invention, constituent materials other than the above-mentioned antibacterial powder (for example, card base material forming the main part of a card, ink, magnetic stripe, etc.) are the materials of this kind applied in the prior art. Is applicable as is.

[0015]

Next, in the antibacterial card according to claim 2, at least one of the outermost surface layer and the outermost surface layer of the card has a layered structure of an organic antibacterial agent. 0.1 to 10 weight of antibacterial powder held in acid salt
%, More preferably from 0.2 to 0.5% by weight, which is a coating resin layer mixed in.

FIG. 2 shows an example of the structure of an antibacterial card embodying the invention of claim 2. That is,
The antibacterial card shown in FIG. 2 includes a card base material 11 made of a white polyvinyl chloride resin, printing layers 12 and 12 ′ provided on both sides of the card base material 11, and the printing layer 1
The resin layers (sheets of polyvinyl chloride resin, etc.) 13 and 14 laminated on the front and back surfaces of 2 and 12 ′, the magnetic stripe 15 embedded in the resin layer 13, and the resin layers 13 and 14 and the resin layer 13 A coating layer (outermost surface layer and outermost surface layer) 16 mixed with an antibacterial powder having an organic antibacterial agent provided on a buried magnetic stripe 15 in a phosphate having a layered structure and its main part Is configured.

Here, the coating layer is a transparent resin capable of forming a film, an antibacterial powder, and a resistance improver for improving abrasion resistance, chemical resistance, and water resistance, which is added as necessary,
A coating liquid for coating containing a pigment, a dye, an antistatic agent, etc. is prepared, and then coated on a card substrate, a resin layer or a printing layer and dried to form the coating liquid.

As the transparent resin capable of forming a film, nitrocellulose, ethyl cellulose, ethyl hydroxyethyl cellulose, maleic acid resin, rosin ester, chlorinated rubber, cyclized rubber, acrylic resin, vinyl chloride resin, vinyl acetate copolymer resin, Polyester resin, urethane resin,
Polyamide resin, alkyd resin, linseed oil wax, modified phenol resin, epoxy resin, urea resin, melamine resin, reactive acrylic emulsion photopolymerizable low polymer,
Examples thereof include thermoplastic resins such as photopolymerizable monomers, thermosetting resins, and ultraviolet curable resins.

The antibacterial powder is the same as the above antibacterial powder, but 0.1% by weight based on the coating liquid for coating.
10 to 10% by weight, more preferably 1 to 5% by weight.

The resistance improver is a substance added to improve resistance such as abrasion resistance, chemical resistance, and water resistance of the coating layer, and specifically, carnauba wax, wood wax, and beeswax. , Anhydrous lanolin, paraffin wax, microcrystalline wax, montan wax, ozokerite, polyethylene wax, polytetrafluoroethylene, fatty acid amide, silicone and the like. Among them, polytetrafluoroethylene and silicon are effective in improving the resistance even in a small amount.

Since the coating layer is very thin, it may be peeled off by scratching or the like. Therefore, it goes without saying that the resin layers 13 and 14 may be formed of resin layers in which antibacterial powder is kneaded, depending on the application of the antibacterial card.

Further, FIG. 3 shows another structural example of the antibacterial card embodying the invention of claim 2, which is a design property called an overprint card printed on a magnetic stripe. It is an excellent card composition.

That is, the antibacterial card shown in FIG.
Card substrate 11 made of white polyvinyl chloride resin, etc.
And the resin layer 1 laminated on the front and back surfaces of the card base material 11.
3, 14, a magnetic stripe 15 embedded in the resin layer 13, a printing layer 17 provided on both sides of the resin layers 13 and 14, and an organic antibacterial agent provided on both sides of each printing layer 17. The main part is composed of the coating layer 16 in which the antibacterial powder held in phosphate having a layered structure is mixed. In addition, depending on the application of the antibacterial card, the printing layer 17 may be formed of ink containing antibacterial powder. In the antibacterial card shown in FIG. 4, the back surface of the antibacterial card shown in FIG. 3 has a resin layer 14 in which antibacterial powder is kneaded.

The structure described in claim 2 has an antibacterial function without adopting a complicated structure such as mixing antibacterial powder in the magnetic layer forming the magnetic stripe 15 as in the structure described in claim 1. Cards with magnetic stripes can be manufactured.

Next, in the antibacterial card according to claim 3, at least one of the outermost surface layer and the outermost surface layer of the card is an antibacterial agent in which an organic antibacterial agent is held in a phosphate having a layered structure. 0.1 to 10% by weight of the crystalline powder , more preferably
It is a printing resin layer mixed in a mixing ratio of 0.2 to 0.5% by weight .

FIG. 5 shows an example of the structure of an antibacterial card embodying the invention of claim 3. That is,
The antibacterial card shown in FIG. 5 includes a card substrate 11 made of white polyvinyl chloride resin and the like, and the card substrate 11
Of the resin layers 13 and 14 laminated on the front and back surfaces, the magnetic stripe 15 embedded in the resin layer 13, and the resin layer 1
A printing layer (outermost surface layer) 17 made of ink mixed with antibacterial powder in which an organic antibacterial agent is held in a phosphate having a layered structure and provided on both surfaces of Nos. There is.

The printing layer mixed with the antibacterial powder is an ink containing a colorant composed of a pigment or a dye, an antibacterial powder, a resin binder (binder) and a dispersant added as necessary, and a screen. It is a layer in which a printing pattern is formed by a printing method, an offset printing layer, or the like.

Further, depending on the use of the antibacterial card, the resin layers 13 and 14 may be composed of resin layers in which antibacterial powder is kneaded.

The configuration according to claim 3 does not require the coating layer 16 as in the configuration according to claim 2, so that the number of manufacturing steps is reduced.

[0030]

According to the antibacterial card of the present invention, at least one of the outermost surface layer and the outermost surface layer of the card has an organic antibacterial agent, especially a quaternary ammonium ion ( 0.1 to 10% by weight, more preferably, an antibacterial powder obtained by retaining claim 4) in a phosphate having a layered structure.
Has a layer kneaded at a blending ratio of 0.2 to 0.5% by weight, so that it becomes possible to impart an antibacterial function to the card. Further, an antibacterial powder in which an organic antibacterial agent is held in a phosphate having a layered structure is more effective than other antibacterial powders.
Excellent antibacterial function and no discoloration of the card due to light.

According to the antibacterial card of the second aspect of the invention, at least one of the outermost surface layer and the outermost surface layer of the card is a phosphate having a layered structure of an organic antibacterial agent. Since it has a coating layer mixed with antibacterial powder held in, it has a magnetic stripe with an antibacterial function without taking a complicated structure such as mixing the antibacterial powder in the magnetic layer forming the magnetic stripe. Cards can be manufactured.

Furthermore, according to the antibacterial card of the third aspect of the present invention, at least one of the outermost surface layer and the outermost surface layer of the card is a phosphoric acid having a layered structure of an organic antibacterial agent. Since the printing layer is mixed with the antibacterial powder held in the salt, it is not necessary to provide the coating layer, and the number of manufacturing steps is reduced.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

Example 1 As shown in FIGS. 1 (A) and 1 (B), an antibacterial card 1 according to this example is provided with a card base material 11 made of a white polyvinyl chloride resin and the front and back surfaces thereof. The card substrate 11 is composed of a printing layer 12 made of a normal printing ink, and benzalkonium (quaternary ammonium salt / organic antibacterial Antibacterial powder holding zirconium phosphate (phosphate) having a layered structure is melt-kneaded with vinyl chloride resin and extruded to a thickness of 0.1 mm,
A resin layer was created. The resin layers 13 and 14 were laminated on the card substrate 11, and a magnetic stripe 15 was embedded in the resin layer 13.

The compounding ratio of the organic antibacterial powder in the resin layers 13 and 14 was 0.2% by weight.

[Test Method for Antibacterial Property] Next, an antibacterial property evaluation test was conducted on the antibacterial card according to this example by the following method.

First, the antibacterial card was added to Escherichia coli (Escherichi
0.2 ml of bacterial solution of a coli IFO 3301) was inoculated, and a polyethylene film was adhered thereto, and stored at 35 ° C., and after 24 hours of storage, surviving bacteria were recovered by SCDLP medium [Nippon Pharmaceutical Co., Ltd.]. Washed out. The viable cell count of this wash-out solution was measured by the agar plate culture method (35 ° C., 2 days) using a cell count measuring medium, and converted into the viable cell count per card.

As a control, the same amount of the bacterial solution as that inoculated on the antibacterial curd was inoculated into a petri dish and tested in the same manner, and the measurement at the start of storage was performed by the control.

For comparison, a card having the same structure as in Example 1 was prepared except that no antibacterial powder was added (Comparative Example 1), and this card was also inoculated with the same bacterial solution. The same test was performed. The results are shown in Table 1.

[Test Method for Discoloration by Ultraviolet Irradiation] Next, the antibacterial card according to this example was tested for discoloration by ultraviolet irradiation by the following method.

The antibacterial card was irradiated with ultraviolet rays generated by a xenon lamp for 50 hours and 100 hours, and the discolored state was visually evaluated.

For comparison, a card having the same structure as in Example 1 was prepared except that a silver-based antibacterial agent was added (Comparative Example 2), and the same test was carried out on this card. The results are shown in Table 1.

[Example 2] Example 1 except that the compounding ratio of the antibacterial powder in the resin layers 13 and 14 was 0.3% by weight.
It is almost the same as the antibacterial card according to.

The same antibacterial liquid was inoculated to the antibacterial curd according to this example, and the same test was conducted. The results are shown in Table 1.

[Example 3] Example 1 except that the compounding ratio of the antibacterial powder in the resin layers 13 and 14 was 0.5% by weight.
It is almost the same as the antibacterial card according to.

Then, the antibacterial card according to this example was also inoculated with the same bacterial solution and the same test was conducted. The results are shown in Table 1.

[0047]

[Table 1]

"Control": A petri dish was inoculated with the same amount of the bacterial solution as that inoculated into the curd. “*”: Not tested.

"Antibacterial Evaluation Test" Usually, if the number of inoculated live bacteria is reduced by 2 orders after 24 hours, it is judged that an antibacterial function is present. Therefore, it can be confirmed that the antibacterial card according to each example has a sufficient antibacterial function.

The "discoloration test by irradiation of ultraviolet rays" was visually evaluated in three stages:-: no discoloration, +: slight discoloration, and ++: obvious discoloration.

[Embodiment 4] The antibacterial card according to this embodiment is provided with a printing layer 17 'made of ordinary printing ink on the back side thereof and made of a white polyvinyl chloride resin as shown in FIG. Card base material 11 and the printed layer 17 '
A resin layer (polyvinyl chloride resin) 14 provided on the surface and kneaded with 0.2% by weight of the same antibacterial powder as in Example 1;
A resin layer (made of polyvinyl chloride resin) 13 provided on the front surface side of the card substrate 11 and having a magnetic stripe 15 on a part thereof and not mixed with the antibacterial powder, and a surface of the resin layer 13 A printing layer 17 which is provided and is made of ordinary printing ink, and an acrylic coating layer 17 which is provided on the surface of the printing layer 17 and in which 0.2% by weight of the above-mentioned antibacterial powder is mixed, constitute a main part thereof. ing.

Then, the antibacterial card according to this example was inoculated with the same bacterial solution as in Example 1 and the same test was conducted. The results are shown in Table 2. For comparison,
A card having the same structure as that of Example 4 was prepared except that no antibacterial powder was added (Comparative Example 3), and the same test was carried out by inoculating the same bacterial solution on this card. Also,
A card having the same structure as that of Example 4 except that a silver-based antibacterial agent was added was prepared (Comparative Example 4), and the same test was performed on this card. The results are also shown in Table 2.

[Embodiment 5] This is substantially the same as the antibacterial card according to Embodiment 4 except that the compounding ratio of the antibacterial powder in the acrylic coating layer 17 is 0.5% by weight.

The same antibacterial liquid was inoculated on the antibacterial card according to this example, and the same test was conducted. The results are shown in Table 2.

[0055]

[Table 2]

The evaluation test is the same as in Examples 1 to 3.

[0057]

According to the antibacterial card according to the present invention, at least one of the outermost surface layer and the outermost surface layer of the card has a layered structure of an organic antibacterial agent. Since the card is provided with the layer in which the antibacterial powder held in the acid salt is kneaded, the card can be provided with the antibacterial function. In addition, an organic antibacterial agent, in particular, an antibacterial powder in which a quaternary ammonium ion (claim 4) is held in a phosphate having a layered structure is superior in antibacterial function to other antibacterial powders and discolored by light. Therefore, a card with any manufacturing method and structure can provide a sufficient antibacterial function.

According to the antibacterial card of the second aspect of the present invention, at least one of the outermost surface layer and the outermost surface layer of the card is a phosphate having a layered structure of an organic antibacterial agent. Since it has a coating layer mixed with antibacterial powder held in, it has a magnetic stripe with an antibacterial function without taking a complicated structure such as mixing the antibacterial powder in the magnetic layer forming the magnetic stripe. Cards can be manufactured.

Furthermore, according to the antibacterial card of the third aspect, at least one of the outermost surface layer and the outermost surface layer of the card is a phosphoric acid having a layered structure of an organic antibacterial agent. Since the printing layer is mixed with the antibacterial powder held in salt, it is not necessary to provide a coating layer, and the number of manufacturing steps is reduced.

[0060]

[Brief description of drawings]

FIG. 1 (A) is a plan view showing an example of an antibacterial card according to the present invention, and FIG. 1 (B) is a sectional view taken along the line BB of FIG. 1 (A).

FIG. 2 is a cross-sectional view showing another example of the antibacterial card according to the present invention.

FIG. 3 is a cross-sectional view showing another example of the antibacterial card according to the present invention.

FIG. 4 is a cross-sectional view showing another example of the antibacterial card according to the present invention.

FIG. 5 is a cross-sectional view showing another example of the antibacterial card according to the present invention.

[Explanation of symbols]

1 Antibacterial card 11 Card base material 12 printing layers 13 Resin layer 14 Resin layer 15 magnetic stripe 16 coating layer 17 printing layers

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI B42D 15/00 341 B42D 15/00 341B G11B 5/80 G11B 5/80 (56) Reference JP-A-5-124806 (JP, JP, A) Registered utility model 3011929 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B42D 1/00-15/10 A61L 2/16

Claims (4)

(57) [Claims] 1. An antibacterial powder in which at least one of the outermost surface layer and the outermost surface layer of a card holds an organic antibacterial agent in a phosphate having a layered structure in an amount of 0.1 to 10% by weight,
More preferably , the antibacterial card is a resin layer kneaded at a blending ratio of 0.2 to 0.5% by weight . 2. At least one of the outermost surface layer and the outermost surface layer of the card contains 0.1 to 10% by weight of antibacterial powder in which an organic antibacterial agent is held in a phosphate having a layered structure ,
More preferably , the antibacterial card is a coating resin layer mixed in a blending ratio of 0.2 to 0.5% by weight . 3. At least one of the outermost surface layer and the outermost surface layer of the card contains 0.1 to 10% by weight of antibacterial powder in which an organic antibacterial agent is held in a phosphate having a layered structure ,
More preferably , the antibacterial card is a printing resin layer mixed in a mixing ratio of 0.2 to 0.5% by weight . 4. The organic antibacterial agent is a quaternary ammonium ion, as claimed in any one of claims 1 to 3.
The antibacterial card described in the item .