Antimicrobial solid material, process for producing the same, and method of utilizing the same
First Claim
1. An antimicrobial solid material which comprises (1) metal ions selected from the group consisting of silver ions, copper ions and zinc ions, as antimicrobial metal ions;
- and (2) a metal selected from the group consisting of silver, copper and zinc, as an antimicrobial metal in a metal state.
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Accused Products
Abstract
An antimicrobial solid material having a satisfactory antimicrobial activity for a long term against sewage in any form of circulating, static and flowing waters or contacting portions thereof and a utilizing method thereof are provided. An antimicrobial solid material as one embodiment of the present invention comprises both of an antimicrobial metal ion and an antimicrobial metal in a metal state. In general, it is believed that antimicrobial metal ions have a potent antimicrobial effect when they exist in a liquid to be treated with a certain concentration or more, but they are rapidly released and exhausted so that their antimicrobial effects cannot last long. On the other hand, it is believed that the antimicrobial metal in a metal state does not have a prompt effect, but exhibits a certain bacteriostatic and fungistatic effect continuously for a long term. Therefore, the antimicrobial solid material containing both of the antimicrobial metal ions and the antimicrobial metal in a metal state thereof has both of a potent initial antimicrobial activity and an enduring bacteriostatic and fungistatic activity.
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Citations
34 Claims
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1. An antimicrobial solid material which comprises (1) metal ions selected from the group consisting of silver ions, copper ions and zinc ions, as antimicrobial metal ions;
- and (2) a metal selected from the group consisting of silver, copper and zinc, as an antimicrobial metal in a metal state.
- View Dependent Claims (14, 24, 26)
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2. An antimicrobial solid material which comprises a mixed layer having (1) metal ions selected from the group consisting of silver ions, copper ions and zinc ions, as antimicrobial metal ions, and (2) a metal selected from the group consisting of silver, copper and zinc, as an antimicrobial metal in a metal state.
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3. An antimicrobial solid material which comprises (1) metal ions selected from the group consisting of silver ions, copper ions and zinc ions, as antimicrobial metal ions, and (2) a metal selected from the group consisting of silver, copper and zinc, as an antimicrobial metal in a metal state, said antimicrobial solid material being supported on a substrate.
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4. An antimicrobial solid material which comprises a mixed layer having (1) metal ions selected from the group consisting of silver ions, copper ions and zinc ions, as antimicrobial metal ions, and (2) a metal selected from the group consisting of silver, copper and zinc, as an antimicrobial metal in a metal state, said mixed layer being supported on a substrate.
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5. An antimicrobial solid material which comprises:
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a substrate, an antimicrobial metal ion layer comprising metal ions selected from the group consisting of silver ions, copper ions and zinc ions, said antimicrobial metal ion layer being fixed on said substrate, and an antimicrobial metal layer in a metal state comprising a metal selected from the group consisting of silver, copper and zinc, said antimicrobial metal layer being fixed on said antimicrobial metal ion layer and is being permeable to said antimicrobial metal ions.
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6. An antimicrobial solid material which comprises:
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a substrate, an antimicrobial metal ion layer comprising metal ions selected from the group consisting of silver ions, copper ions, and zinc ions, fixed on said substrate, and a mixed layer having (1) metal ions selected from the group consisting of silver ions, copper ions and zinc ions, as antimicrobial metal ions, and (2) a metal selected from the group consisting of silver, copper and zinc, as an antimicrobial metal in a metal state, said mixed layer being fixed on said antimicrobial metal ion layer.
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7. An antimicrobial solid material which comprises:
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a substrate, an antimicrobial metal ion layer comprising metal ions selected from the group consisting of silver ions, copper ions and zinc ions, fixed on said substrate, and an ion release-suppressing layer comprising particles of photocatalyst and metal in a metal state, through which said antimicrobial metal ions fixed to part of gaps between said particles are permeable, said ion release-suppressing layer being fixed on said antimicrobial metal ion layer and inhibiting elution of said metal ions. - View Dependent Claims (9, 25, 27, 34)
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8. An antimicrobial solid material which comprises:
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a substrate, an antimicrobial metal ion layer comprising metal ions selected from the group consisting of silver ions, copper ions and zinc ions, fixed on said substrate, and an ion release-suppressing layer comprising (1) metal ions selected from the group consisting of silver ions, copper ions and zinc ions, as antimicrobial metal ions, (2) particles of photocatalyst and (3) an antimicrobial metal in a metal state, through which said antimicrobial metal ions fixed to part of gaps between said particles are permeable, said ion release-suppressing layer being fixed on said antimicrobial metal ion layer.
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10. An antimicrobial solid material which comprises:
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a substrate, an antimicrobial metal ion layer comprising metal ions selected from the group consisting of silver ions, copper ions and zinc ions, fixed on said substrate, a photocatalyst layer fixed on said antimicrobial metal ion layer, and a mixed layer comprising, metal ions selected from the group consisting of silver ions, copper ions and zinc ions, and metal in a metal state, said mixed layer being fixed on said photocatalyst layer. - View Dependent Claims (32, 33)
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11. An antimicrobial solid material which comprises a substrate, a deep-layer antimicrobial metal ion layer supported on the substrate, an ion release-suppressing layer containing an antimicrobial metal in a metal state fixed on said antimicrobial metal ion layer, and a surface-layer antimicrobial metal ion layer supported on said ion release-suppressing layer.
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12. An antimicrobial solid material which comprises both silver ions and copper ions as antimicrobial metal ions, and both silver and copper as antimicrobial metals in a metal state.
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13. An antimicrobial solid material which comprises:
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a substrate, an antimicrobial metal ion layer comprising silver ions and copper ions, said metal ion layer being fixed on said substrate, and an ion release-suppressing layer comprising particles of photocatalyst and metal in a metal state, through which said antimicrobial metal ions fixed to part of gaps between said particles permeable, said ion release-suppressing layer being fixed on said antimicrobial metal ion layer and suppressing release of said metal ions.
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15. A process for producing an antimicrobial solid material which comprises:
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an ion applying step in which metal ions selected from the group consisting of silver ions, copper ions and zinc ions, as antimicrobial metal ions, are applied on the surface of a substrate, and a reducing step in which a portion of said antimicrobial metal ions are reduced to an antimicrobial metal in a metal state. - View Dependent Claims (16, 17)
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18. A process for producing an antimicrobial solid material which comprises:
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a photocatalyst layer forming step for forming a porous photocatalyst layer on the surface of a porous substrate, a soaking step to absorb antimicrobial metal ions to the substrate to which said photocatalyst layer is formed, and an irradiating step to deposit an antimicrobial metal in a metal state by irradiating light to the photocatalyst layer containing the antimicrobial metal ions.
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19. A process for producing an antimicrobial solid material which comprises:
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a step of preparing an inorganic porous substrate, a step of forming a porous photocatalyst layer comprising TiO2 on said substrate by coating a titanium oxide sol to said substrate and then baking, a step of dipping the substrate to which the photocatalyst layer is formed in a solution containing antimicrobial metal ions, and an irradiating step to deposit an antimicrobial metal in a metal state by irradiating light to the photocatalyst layer containing the antimicrobial metal ions.
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20. An antimicrobial treatment method of a liquid which comprises
placing, in a liquid to be treated, an antimicrobial solid material having a substrate, an antimicrobial metal ion layer fixed to the substrate, and an ion release-suppressing layer fixed on said antimicrobial metal ion layer and containing metal in a metal state, and irradiating light containing an ultraviolet ray to said antimicrobial solid material to control a released amount of antimicrobial metal ions to the liquid to be treated by controlling deposition of the metal in a metal state at the surface of the antimicrobial solid material.
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28. An antimicrobial solid material which comprises:
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a layer comprising a substance having a photocatalytic function fixed on the surface of a substrate, and an initially effective antimicrobial agent and an enduringly effective antimicrobial agent supported on said layer.
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29. An antimicrobial solid material which comprises:
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a substrate, a first layer, comprising an initially effective antimicrobial agent, fixed on said substrate, and a second layer, comprising an enduringly effective antimicrobial agent and a substance having a photoctalytic function, fixed on said first layer.
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30. An antimicrobial solid material which comprises:
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a storage portion of an antimicrobial component, and a suppressing layer containing a photocatalytic function, which inhibits elution of the antimicrobial component from said storage portion.
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31. An antimicrobial solid material which comprises:
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a substrate, a first layer comprising a storage portion of an antimicrobial component and a portion which inhibits elution of the antimicrobial component from said storage portion, fixed on said substrate, and a surface layer which releases the antimicrobial component fixed on the first layer.
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Specification