JPH1128782A - Antifungus and antibacterial article and transfer sheet for its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a good antifungues and antibacterial effect even by reduc ing a use amount of an antifungus and antibacterial agent. SOLUTION: An antifugues and antibacterial layer 3 containing an antifugues agent and/or an antibacterial agent is formed, in a reticular pattern, on a surface of an article 6. The antifungus and antibacterial layer is formed on a surface of the article 6 by forming directly on the surface of the article 6 by printing, or forming the layer 3 containing at least the antifungus agent and/or the antibacterial agent as the transfer layer 1 in a reticular shape, on one side surface of a releasable carrier sheet 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various articles having antibacterial and antifungal properties and a transfer sheet used for producing the articles.

[0002]

2. Description of the Related Art In recent years, it has been practiced to increase the commercial value of various articles used by humans by imparting antibacterial and antifungal properties to the articles. In order to impart antibacterial and antifungal properties to an article in this way, a method is employed in which the article is uniformly applied to the entire surface of the article using a paint to which an antibacterial agent or an antifungal agent is added.

[0003]

However, the above method requires a large amount of expensive antibacterial and antifungal agents, and the surface of the article becomes cloudy due to the addition of the antibacterial and antifungal agents, and the window material is not used. In the case of transparent articles such as those described above, there is a problem that the transparency is reduced.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide a good antibacterial and antifungal effect even when the amount of the antibacterial and antifungal agent used is reduced. An object of the present invention is to provide an antibacterial / antifungal article having the same and a transfer sheet used for the production thereof.

[0005]

In order to achieve the above-mentioned object, an antibacterial / antifungal article according to the present invention has an antibacterial / antifungal layer containing an antibacterial agent and / or an antifungal agent on the surface thereof in a mesh form. Characterized by the following pattern.

[0006] The antibacterial / antifungal article having the above structure is characterized in that a layer containing at least an antibacterial agent and / or an antifungal agent is formed as a transfer layer on one side of a release carrier sheet. It is manufactured using a transfer sheet.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As an antibacterial agent or an antifungal agent, the following commercially available agents can be used. Antibacterial Ag ⁺ , Cu ²⁺ , Zn ²⁺ , Hg ⁺ , Ni ²⁺ ,
Metal ions such as Cd ²⁺ (in particular, Ag ⁺ is harmless to the human body and has a long lasting effect, and is therefore desirable from the viewpoint of safety and performance). Zeolite, apatite, glass, silica gel, phosphate, zirconium phosphate, etc. (Ex. Especially zeolite and zirconium phosphate with high track record and high reliability) supported ion-exchangeably.
3-54013, JP-A-4-300975, JP-A-2529574 and the like). The metal ion content is 0.1 to 15% by weight in the case of Ag ⁺ , Cu ²⁺
Alternatively, in the case of Zn ^2+, the content is preferably 0.1 to 8% by weight. In the above, an antibacterial ion obtained by further adding an ammonium ion to a metal ion (Japanese Patent Publication No. 4-286)
No. 46, Japanese Patent No. 2529574, etc.). Organic compounds having antibacterial properties, for example, sulfa agents such as P-aminobenzenesulfonamide, sulfathiazole, sulfapyridine, and sulfadiazine; dithiocarbamates such as dimethyldithiocarbamate and ethylenebisdithiocarbamate; 2- ( 2-furyl) -3-
(5-nitro-2furyl) acrylamide and the like. Trimethoxysilylpropyl octadecyl ammonium chloride having antibacterial and antifungal properties, 10,10 '
-Oxybisphenoxyarsine, 2- (4-thiazolyl) -benzimidazole, bis (2-viridylthio-
1-oxide) zinc, 2-N-octyl-4-isothiazolin-3-one, 2,3,5,6-cytochloro-4-
(Methylthio) -phthalimide, N- (fluorodichloromethylthio) florimide, griseofulvin, tricomycin, amphotericin B and the like. Antibiotics, for example, phenoxymethyl penicillin, penicillins such as dicloxacillin, cephalothin, cephalosporins such as cefazolin, streptomycin sulfate,
Streptomycin such as paromomycin (sulfate), erythromycin such as erythromycin and josamycin, tetracycline such as tetracycline and lolitetracycline nitrate, chloramphenicol, and chloramphenicol such as thiamphenicol aminoacetic acid ester hydrochloride. Fine particles of anatase-type titanium dioxide or those obtained by supporting the same on an inorganic porous material such as zeolite or silicagen. These are excited by light to generate oxygen radicals and hydroxyl radicals from surrounding water molecules and oxygen molecules, and decompose molds and bacteria by the reaction of these radicals.

[0008] In addition, amino acid metal soap, metal phosphate and the like can be used. In addition, as natural antibacterial and antifungal agents, chitin and chitosan, components of crab shell, hinokitiol, components of cypress and hiba, and bamboo components, and tea leaves (mainly catechin) are used. Stuff, wasabi,
Those using ingredients of mustard and the like can be mentioned.

When the antibacterial and antifungal agent is a solid, the particle size is 10
A film having a size of not more than μm, preferably 0.01 to 5 μm is used.

[0010] If these antibacterial agents or antifungal agents have printing and film forming properties (possibility of solidification) by themselves, it is possible to form a mesh pattern by printing or the like by itself. Usually, it is used as a form of ink containing an antibacterial agent and an antifungal agent in a pattern forming step such as printing.

The antibacterial and antifungal ink comprises a mixture of the above antibacterial agent or antifungal agent and a binder resin. As the binder resin in this case, a two-component curable polyurethane resin,
Thermosetting resin such as unsaturated polyester resin, epoxy resin, melamine resin, polysiloxane resin, acrylic resin, vinyl acetate resin, vinyl chloride vinyl acetate copolymer, cellulose resin, thermoplastic polyester, carbon fluoride resin , A thermoplastic resin such as chlorinated polyolefin, or a UV or electron beam curable resin made of a prepolymer or monomer of a polyfunctional acrylate. The amount of the antibacterial or antifungal agent added to the binder resin is usually 1
About 50% by weight. If it is less than 1%, the antibacterial and antifungal effects are insufficient, and if it exceeds 50%, the effect of the addition generally becomes saturated, the pattern forming property is reduced by printing due to thickening, and the pattern (ink film) It is not preferable in that the strength is reduced and the material cost is increased.

In particular, the anatase-type titanium dioxide antibacterial and antifungal agents have an action of decomposing organic substances by radicals generated by photoexcitation. As the binder resin to be added, a fluorine resin such as carbon fluoride (polyvinylidene fluoride, polyvinyl fluoride, etc.) which is hardly decomposed by radicals, or a silicon resin such as a polysiloxane resin is preferable.

As a mesh pattern, FIG.
Various lattice patterns as shown in (e) are used. Then, the line spacing of the mesh made of the antibacterial / antifungal layer a is 1
Printing is performed so as to be 10 to 10 mm, preferably 2 to 5 mm. If the line interval is 1 mm or less, the printing area increases and the cost increases. Conversely, if the line interval is 10 mm or more, the antibacterial and antifungal effect is out of reach, so that bacteria may propagate in some places. Further, the line width of the mesh is preferably 0.5 to 10 mm. The area coverage of the article surface of the layer containing the antibacterial agent / antifungal agent is 15 to 75%. The film thickness is about 1 to 100 μm.

The article referred to in the present invention is a flat plate, a curved curved plate, or a three-dimensional molded article having various shapes. Examples of the material for the article include polyolefins such as polyethylene, polypropylene, and olefin-based thermoplastic elastomers, thermoplastic polyesters such as polyethylene terephthalate and polybutylene terephthalate, acrylic resins, polycarbonate resins, polyvinyl chloride resins, polystyrene, and AB.
S, phenolic resin, epoxy resin, urea resin, synthetic resin such as urethane resin, iron, copper, metal such as aluminum,
Ceramics such as glass and ceramics, wood veneer, wood plywood,
Wood materials such as wood fiber board (MDF and the like) and particle board are exemplified. In addition, non-woven fabric or paper is impregnated with a thermo-setting resin such as melamine resin or diallyl phthalate resin and molded and hardened by hot pressing. FR impregnated with resin etc. and hardened by hot press
P or the like may be used.

The method of forming a network pattern of an antibacterial / antifungal layer on the surface of the article is not particularly limited, but in practice, any of the following methods is typical. A mesh pattern is printed directly on a desired portion of the article surface by a known printing method such as gravure printing, offset printing, gravure offset printing, silk screen printing, letterpress (letterpress) printing, or the like. At that time, a plate on which a desired network pattern is made is used, and the ink containing the antibacterial and antifungal agent is transferred from the plate onto the article into the network pattern. By the printing method described above, a transfer sheet is formed in which a network pattern of an ink containing an antibacterial and antifungal agent is formed on a carrier sheet so as to be peelable. Then, the network pattern of the antibacterial / antifungal layer is transferred from the transfer sheet onto the article. This method is effective when the surface of the article is rough, ink-absorptive, uneven, or easily deteriorated by a solvent in the ink, so that direct printing is difficult.
The mesh pattern layer containing the antibacterial and antifungal agent is positioned so as to be the outermost surface of the transfer layer after transfer.

FIG. 2 is a cross-sectional view showing a configuration example of the transfer sheet. As shown in FIG. 2, the transfer sheet 1 has a releasable carrier sheet 2 having an antibacterial / antifungal layer 3 on one side in a mesh form. A resin layer 4 is formed on the entire surface so as to cover it, and an adhesive layer 5 is provided outside the resin layer 4. In order to transfer the antibacterial / antifungal layer 4 onto an article by the transfer sheet 1,
As shown in FIG. 3, the transfer sheet 1 is pressed against the surface of the article so that the adhesive layer 5 is on the side of the article 6, and after applying a predetermined heat pressure, the carrier sheet 1 is peeled off and meshed with the resin layer 4. The antibacterial / antifungal layer 3 is left on the surface of the article 6 as a transfer layer.

The carrier sheet 2 includes a polyethylene film, a polypropylene film, a polyvinyl chloride film, a polyvinylidene chloride film, a polyvinyl alcohol film, a polyethylene terephthalate film, a nylon film, an ethylene vinyl acetate copolymer film, an ethylene vinyl alcohol copolymer. Films, plastic films such as ionomers, and coated papers such as polyolefin-coated paper and silicone resin-coated paper can be used.

Further, if necessary, a release layer may be provided to promote the release property between the carrier sheet and the transfer layer. As the release layer, a release agent such as a fluororesin, various waxes, silicone, and melamine resin alone, or a coating of a coating obtained by adding these to a known vehicle such as an acrylic resin, a cellulose resin, or a vinyl resin is used. It is formed by a film.

An adhesive layer is provided if necessary. As the adhesive, those known in the field of the transfer sheet, for example, acrylic resin, vinyl chloride-vinyl acetate copolymer, polyamide, polyester resin and the like are used.

A decorative layer is provided if necessary. Examples of the decoration layer include a pattern printing layer and a metal thin film layer. These may be formed by known materials and means. However, the decorative layer is positioned so as not to cover the surface of the antibacterial / antifungal layer (the surface after transfer).

The decorative layer and the adhesive layer may not be provided at the time of preparing the transfer sheet, and may be laminated on the article or the transfer sheet at the time of transfer.

The article of the present invention can be used for various purposes. For example, building interior materials such as walls, floors and ceilings, furniture such as partitions, furniture, vehicle interior materials such as automobiles and trains, household equipment such as kitchens, bathtubs and bathrooms, television receivers, and home appliances such as refrigerators It is used by being laminated on the surface of containers such as cabinets, bags and boxes of products. In particular, from the viewpoint of antibacterial and antifungal properties,
It is suitable for hospitals, cafeterias, bathroom interiors, food-related containers, kitchens, bathtubs and the like.

[0023]

【Example】

(Example) A biaxially stretched polyester film having a matte surface (thickness: 26 µm, manufactured by Toray) was used as a carrier sheet.
Then, using an ink obtained by adding a solid content ratio of 10% by weight to an acrylic resin binder with an inorganic antibacterial agent (average particle size: 0.5 mm, manufactured by Toa Gosei Chemical Industry Co., Ltd.) carrying silver ions on phosphate, a 1 mm line was used. Fig. 1 in which linear patterns of width are arranged at 5 mm intervals (period) in the vertical and horizontal directions and are orthogonal to each other
A mesh pattern of a square lattice as shown in (a) was gravure printed to a thickness of 2 μm to form an antibacterial / antifungal layer. Next, using the acrylic ink to which no antimicrobial agent was added, gravure printing was performed on the entire surface so that the coating amount after drying was 2 g / m ² to form a resin layer. Subsequently, using a mixture of an acrylic resin and a vinyl chloride-vinyl acetate copolymer as a binder, using a coloring ink to which a pigment mainly composed of a red stem is added, a wood grain pattern is printed by gravure printing, and a decorative layer is formed. did. Finally, an adhesive layer was formed by laminating a vinyl chloride-vinyl acetate copolymer resin by drying at a rate of 1 g / m ² by a gravure printing method to obtain a transfer sheet of the present invention.

Comparative Example 1 The same polyester film as in the example was used as a carrier sheet. Then, the same inorganic antibacterial agent as in the example was added to the acrylic resin binder at a solid content ratio of 10%.
Gravure printing was performed uniformly over the entire surface of the carrier sheet using the ink added in an amount of 2% by weight so that the coating amount after drying was 2 g / m ² . Thereafter, a decorative layer and an adhesive layer were formed in the same manner as in the example to obtain a transfer sheet.

Comparative Example 2 The same polyester film as in the example was used as a carrier sheet. Then, using an ink in which the same inorganic antibacterial agent as in the example was added to the binder of the acrylic resin at a solid content ratio of 1% by weight, the gravure was uniformly applied to the entire surface of the carrier sheet so that the coating amount after drying was 2 g / m ^2. Printed. Thereafter, a decorative layer and an adhesive layer were formed in the same manner as in the example to obtain a transfer sheet.

Comparative Example 3 The same polyester film as in the example was used as a carrier sheet. Then, gravure printing was performed uniformly over the entire surface of the carrier sheet using an ink in which no antibacterial agent was added to the binder of the acrylic resin so that the coating amount after drying was 2 g / m ² . Thereafter, a decorative layer and an adhesive layer were formed in the same manner as in the example to obtain a transfer sheet.

(Evaluation) Each of the transfer sheets obtained above was transferred to an ABS plate having a thickness of 2 mm to prepare a test evaluation sample. Table 1 shows the evaluation results using these samples. In Table 1, the antibacterial activity A is for Escherichia coli, and the number of bacteria to be inoculated was initially set at 10 ⁵ , and the number of bacteria after 24 hours at 25 ° C. was measured. The antibacterial activity B was against Staphylococcus aureus. The initial number of inoculated bacteria was 10 ⁷ and the number of bacteria after 24 hours at 25 ° C. was measured.

[0028]

[Table 1]

[0029]

As described above, the present invention provides good antibacterial and antifungal properties by forming an antibacterial and antifungal layer containing an antibacterial agent and / or an antifungal agent on the surface of an article in a network pattern. Since the amount of the antibacterial and antifungal agent used can be reduced while having an antifungal effect, it is possible to prevent a decrease in surface physical properties of the article and to reduce the cost.

[Brief description of the drawings]

FIG. 1 is a pattern diagram showing an example of a mesh pattern.

FIG. 2 is a cross-sectional view illustrating a configuration example of a transfer sheet.

FIG. 3 is a perspective view illustrating a transfer state of a transfer sheet.

[Description of Signs] a Antibacterial / antifungal layer 1 Transfer sheet 2 Carrier sheet 3 Antibacterial / antifungal layer 4 Resin layer 5 Adhesive layer 6 Article

Claims (2)

[Claims] 1. An antibacterial / antifungal article characterized in that an antibacterial / antifungal layer containing an antibacterial agent and / or an antifungal agent is formed in a net-like pattern on the surface. 2. A transfer sheet characterized in that a layer containing at least an antibacterial agent and / or an antifungal agent is formed as a transfer layer on one side of a release carrier sheet in a mesh form.