TH47554A - Molded antimicrobial agents and the processes by which they are manufactured. - Google Patents

Abstract

DC60 (14/07/42) This invention relates to molded antimicrobial material consisting of an infiltrated antimicrobial agent formed as a free phase at 0.01 microns or greater in diameter in the molded material. It is desirable that the antimicrobial agent be a pyridine-based antimicrobial agent with a molecular weight of 200 to 700 and an inorganic/organic value of 0.3 to 1, and that 50% or more of the antimicrobial agent is infiltrated at a depth of 0.5, preferably 1 micron or greater, from the surface of the molded material, or that 30% or more of the antimicrobial agent is infiltrated at a depth of 2 microns or greater from the surface of the molded material. It is also desirable that the molded material be a fiber with a surface area used per 1 g of fiber in 0.1 m² or greater, and that the synthetic fiber is a dyed antimicrobial fiber product. The molded antimicrobial substance of this invention can be obtained, for example, by immersing the fiber product in a dyeing liquid containing a pyridine-based antimicrobial substance with a molecular weight of 200 to 700, an inorganic/organic property value of 0.3 to 1.4, and an average particle size of 2 microns or less, and simultaneously treating it with dyeing under pressure; or by applying the liquid containing the pyridine-based antimicrobial substance with a molecular weight of 200 to 700, an inorganic/organic property value of 0.3 to 1.4, and an average particle size of 2 microns or less to the fiber product by extrusion, spraying, and heat treatment at 160 to 200 °C in dry or wet conditions. This invention, as described above, can provide a molded antimicrobial substance exhibiting excellent antimicrobial activity and superior industrial wash resistance. This invention relates to molded antimicrobial material consisting of an infiltrated antimicrobial agent formed as a free phase of 0.01 μm or greater in shorter diameters within the molded material. It is desirable that the antimicrobial agent be a pyridine-based antimicrobial with a molecular weight of 200 to 700 and an inorganic/organic property value of 0.3 to 1, and that 50% or more of the antimicrobial agent is infiltrated to a depth of 0.5, preferably 1 μm or greater, from the surface of the molded material, or that 30% or more of the antimicrobial agent is infiltrated to a depth of 2 μm or greater from the surface of the molded material. It is also desirable that the molded material be a fiber with a surface area used per 1 g of fiber in 0.1 m² or greater, and that the synthetic fiber is a dyed antimicrobial fiber product. The molded antimicrobial material of the invention can be exemplified by immersing the fiber product in a dyeing liquid containing Antimicrobial agents based on pyridine with a molecular weight of 200 to 700, inorganic/organic properties of 0.3 to 1.4, and an average particle size of 2 μm or less, can be simultaneously treated with dyes under pressure or with liquids containing the pyridine-based antimicrobial agent with a molecular weight of 200 to 700, inorganic/organic properties of 0.3 to 1.4, and an average particle size of 2 μm or less, of the fiber product by extrusion, spraying, and heat treatment at 160 to 200°C in dry or wet conditions. This invention, as described above, can provide molded antimicrobial agents exhibiting excellent antimicrobial activity and superior industrial wash resistance.

Claims (22)

1. Molded antimicrobial objects containing an infiltrated antimicrobial agent that forms a free phase of 0.01 μm or more in diameter within the molded object. 2. Molded antimicrobial substances in accordance with claim 1, where the antimicrobial substance is pyridine-based. 3. Molded antimicrobial substances in accordance with claim 1, whereby the antimicrobial substance shall have an inorganic/organic property value of 0.3 to 1.4. 4. Molded antimicrobial substances in accordance with claim 1, where the molecular weight of the antimicrobial substance is 200 to 700. 5. Molded antimicrobial material, in accordance with claim 1, where the molded material is a fiber. 6. Molded antimicrobial objects, in accordance with claim 1, whereby 50% or more of the antimicrobial agent is penetrated to a depth of 1 μm or more from the surface of the molded object. 7. Molded antimicrobial objects, in accordance with claim 1, whereby 30% or more of the antimicrobial agent is penetrated to a depth of 2 μm or more from the surface of the molded object. 8. Molded antimicrobial substances, in accordance with Requisition 1, whereby at least one pyridine-based antimicrobial substance shall be selected from 2-chloro-6-trichloromethylpyridine, 2-chloro-4-trichloromethyl-6-methoxypyridine, 2-chloro-4-trichloro-methyl-6-(2-furylmethoxy)pyridine, di(4-chlorophenyl)pyridine-methanol, 2,3,5-trichloro-4-(n-propylsulfonyl)pyridine, 2-pyridylthiol-1-oxide zinc, and di(2-pyridylthiol-1-oxide). 9. Molded antimicrobial substances in accordance with claim 1, whereby the pyridine-based antimicrobial substance is 2-pyridylthiol-1-oxide zinc. 10. Molded antimicrobial items in accordance with claim 5, where a pyridine-based antimicrobial agent is infiltrated into synthetic fibers. 11. Molded antimicrobial items in accordance with claim 5, where the synthetic fiber is polyester. 12. Molded antimicrobial items in accordance with claim 5, where synthetic fibers are dyed with dispersed dyes. 13. Molded antimicrobial items in accordance with claim 5, where synthetic fibers are dyed with acidic dyes. 14. Molded antimicrobial items in accordance with claim 5, where synthetic fibers are dyed with cationic dyes. 15. Molded antimicrobial agents in accordance with claim 5, where a pyridine-based antimicrobial agent is circularly diffused near the surface of the synthetic fiber within the fiber. 16. Molded antimicrobial agents, in accordance with claim 5, where a pyridine-based antimicrobial agent is branched to spread from the surface to the interior of the synthetic fibers, within the fibers. 17. Molded antimicrobial items, in compliance with claim 5, where the antimicrobial activity value is measured in accordance with the microbial control evaluation method (standard test method), are specified by SEK (New Function Evaluation Conference For Fiber Goods) as 2.2 or greater until now, after industrial washing at 12 minutes/cycle at 80°C x 50 times with a washing liquid containing surfactants. 18. The process for manufacturing molded antimicrobial objects consists of a step of immersion of the molded object in a resin liquid containing a pyridine-based antimicrobial agent with a molecular weight of 200 to 700, an inorganic/organic property value of 0.3 to 1.4, and an average particle size of 2 μm or less, and colorants, and heat treatment at 90 to 160 °C. 19. A process for the manufacture of molded antimicrobial items in accordance with claim 18, where the dry heat treatment is achieved at 160 to 200 °C after heat treatment in aqueous solution. 20. The process for manufacturing molded antimicrobial objects consists of steps involving the application of pyridine-based antimicrobial agents with a molecular weight of 200 to 700, an inorganic/organic coefficient of 0.3 to 1.4, and an average particle size of 2 μm or less, to molded resin objects by compression or spraying, and subsequent heat treatment at 160 to 200 °C in dry or wet conditions. 21. A process for the production of molded antimicrobial substances in accordance with claim 18, where pyridine-based antimicrobial substances are formed into colloidal granules. 22. The process for the manufacture of molded antimicrobial agents in accordance with claim 21, whereby pyridine-based antimicrobial agents are made into colloids by water and the products of formalin condensation.