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US 5,178,495 AGranted
Polymeric film with biocide
AssigneeReef Industries, Inc.
InventorWilliam D. Cameron
Life of this patent
Estimating the term…
Abstract
A multi-ply film has been developed that includes a biocide in at least one of the film layers. The multi-ply film with the biocide can be used to construct water containment facilities for drinking water, fish farms and industrial use and can be used as a covering for water tanks or equipment in environments that promote microbial growth. The biocide inhibits microbial growth at the surface of the film.
Claims27
A polymeric multi-ply film comprising
- at least two layers of thermoplastic forming a multi-ply film;
- at least one of said layers including a biocide in a sufficient amount for biocidal activity;
- said biocide mixed with the thermoplastic prior to extrusion of the sheet;
- and
- said biocide effectively retarding microbial growth at the surface of the layer of the sheet containing the biocide.
2 more elements
A polymeric multi-ply film comprising
- a co-extruded thermoplastic with three co-extruded layers that form a single sheet of thermoplastic;
- a main inner layer of said co-extruded thermoplastic sheet;
- a lamination layer of a polymer or mixtures of polymers capable of heat lamination contiguous to said main inner layer;
- a seal layer contiguous to said inner layer and opposite to said lamination layer;
- two sheets of said co-extruded thermoplastic with the seal layer of at least one sheet mixed with biocide prior to co-extrusion of said sheet of thermoplastic and said sheets heat laminated with the lamination layers facing each other and said sheets oriented in a nonlinear manner;
- and
- said biocide effectively retarding microbial growth at the surface of the seal layer containing the biocide.
4 more elements
A polymeric multi-ply film comprising
- two sheets of co-extruded thermoplastic each with two co-extruded layers that form a single sheet of thermoplastic;
- a lamination layer forming one of the layers of said co-extruded thermoplastic sheet that is capable of heat lamination;
- a main layer opposite said lamination layer of a thermoplastic mixed with said biocide prior to co-extrusion of said sheet of thermoplastic;
- said two sheets of co-extruded thermoplastic heat laminated with the lamination layers facing each other with said sheets oriented in a nonlinear manner;
- and
- said biocide effectively retarding microbial growth at the surface of the layers containing the biocide.
3 more elements
A polymeric multi-ply film comprising
- two sheets of co-extruded thermoplastic with three co-extruded layers that form a single sheet of thermoplastic;
- main inner layer of said co-extruded thermoplastic;
- a lamination layer of a polymer or mixtures of polymers capable of heat lamination contiguous to said main inner layer;
- a seal layer opposite said lamination layer and contiguous to said main inner layer of a thermoplastic;
- an additional sheet of co-extruded thermoplastic with three co-extruded layers of an inner layer and two lamination layers capable of heat lamination on either side of the inner layer;
- said additional sheet of co-extruded thermoplastic heat laminated to the two co-extruded thermoplastic sheets having the seal layer such that the seal layers face outward and the sheet with two lamination layers is sandwiched in between;
- said sheets oriented one to another in a nonlinear arrangement with respect to each contiguous sheet;
- at least one of said seal layers mixed with a biocide prior to co-extrusion of said sheet of thermoplastic;
- and
- said biocide effectively retarding microbial growth at the surface of the seal layers containing the biocide.
7 more elements
A polymeric multi-ply film comprising
- two sheets of co-extruded thermoplastic with three co-extruded layers that form a single sheet of thermoplastic;.
- a main inner layer of said co-extruded thermoplastic;
- a lamination layer of a polymer or mixture thereof capable of heat lamination contiguous to said main inner layer;
- a seal layer opposite said lamination layer and contiguous to said main inner layer of a thermoplastic;
- said two sheets of co-extruded thermoplastic heat laminated with the lamination layers facing each other and said sheets oriented in a nonlinear manner to form a reinforced laminate;
- at least two reinforced laminate layers further laminated together with an extrusion coating to form a multi-ply film;
- a biocide mixed with the thermoplastic prior to extrusion in at least one of the seal layers;
- and
- said biocide in a effective amount to retard microbial growth at the surface of the film.
6 more elements
Dependencies are inferred from the claim text.