초록 ▼

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 prese

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.

대표청구항 ▼

[ We 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 me

[ We 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. [15.] A process for producing an antimicrobial solid material which comprises: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, anda reducing step in which a portion of said antimicrobial metal ions are reduced to an antimicrobial metal in a metal state. The process for producing an antimicrobial solid material according to claim 15, wherein the antimicrobial metal ions are applied to a porous substrate by absorbing the antimicrobial metal ions. The process for producing an antimicrobial solid material according to claim 15, wherein said reducing step is accomplished by using a step selected from the group consisting of photoirradiation, using a sacrifice oxidizer or applying thermal treatment. A process for producing an antimicrobial solid material which comprises: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, andan irradiating step to deposit an antimicrobial metal in a metal state by irradiating light to the photocatalyst layer containing the antimicrobial metal ions. A process for producing an antimicrobial solid material which comprises:a step of preparing an inorganic porous substrate,a step of forming a porous photocatalyst layer comprising TiO.sub.2 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, andan irradiating step to deposit an antimicrobial metal in a metal state by irradiating light to the photocatalyst layer containing the antimicrobial metal ions. [20.] An antimicrobial treatment method of a liquid which comprisesplacing, 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, andirradiating 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.