Substrates having a functional capability
AssigneeImerys Minerals Limited
InventorsTarquin CROUCH, Michael BIRD
Life of this patent
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Abstract
A surface-mineralized substrate having an enhanced functional capability, for example, enhanced antibacterial activity, a method of making the surface-mineralized substrate, and an article of manufacture, for example, packaging for fresh produce, comprising or formed from or of the surface-mineralized substrate.
Claims22
A surface-mineralized substrate having enhanced antibacterial activity, the substrate comprising an inorganic particulate material embedded in a surface region thereof and/or attached to a surface thereof, wherein the inorganic particulate material has an antibacterial capability, wherein the surface-mineralized substrate has an antibacterial activity enhancement factor (AAEF) of at least 1.5,
- wherein AAEF=R/W, where
- R is the antibacterial activity of the surface-mineralized substrate according to ISO 22196:2007 for Pseudomonas aeruginosa, and
- W is the % by weight of inorganic particulate material embedded in the surface region and/or attached to the surface of the surface-mineralized substrate, based on the total weight of the surface mineralized substrate.
A surface-mineralized substrate having enhanced antibacterial activity, the substrate comprising an inorganic particulate material embedded in a surface region thereof and/or attached to a surface thereof, wherein the inorganic particulate material has an antibacterial capability, and wherein the surface-mineralized substrate has an antibacterial activity, R, of at least about 2.0 according to ISO 22196:2007 for Pseudomonas aeruginosa when the substrate comprises no more than about 3.0% by weight of inorganic particulate material in the surface region thereof and/or attached to the surface thereof, based on the total weight of the surface-mineralized substrate.
(canceled)
A method of manufacture comprising applying an inorganic particulate material having an antibacterial capability to the surface of a substrate,
- wherein the substrate has a surface region which is embeddable with the inorganic particulate material and/or a surface to which the inorganic particulate material is attachable, and
- wherein the inorganic particulate becomes embedded in the surface region of the substrate and/or attached to the surface of the substrate upon further processing to form a surface-mineralized substrate, and
- wherein the surface-mineralized substrate has an antibacterial activity enhancement factor (AAEF) of at least 1.5,
- wherein AAEF=R/W, where
- R is the antibacterial activity of the surface-mineralized substrate according to ISO 22196:2007 for Pseudomonas aeruginosa, and
- W is the % by weight of inorganic particulate material embedded in the surface region and/or attached to the surface of the surface-mineralized substrate, based on the total weight of the surface mineralized substrate.
Dependencies are inferred from the claim text.