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US 4,284,681 AGranted
Composite sheet material
AssigneeDycem Limited
InventorsJames N. Tidmarsh, Gerald N. Swift
Life of this patent
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AssigneeDycem Limited
InventorsJames N. Tidmarsh, Gerald N. Swift
Estimating the term…
A composite material comprising a layer of highly-plasticised polyvinylchloride, comprising 15 to 45% of polyvinylchloride and 55 to 85% by weight of a plasticiser, a fibrous backing, and an intermediate layer of a polymeric material between the polyvinylchloride layer and the backing, which material at least reduces the migration of plasticiser from the highly-plasticised polyvinylchloride layer to or through the backing. This material can be bonded using an adhesive to the walls, floor, and/or ceiling of a room which is to be kept free of dust and/or bacteria, e.g. an operating theatre or computer room. The dust and/or bacteria adhere to the exposed surface of the highly plasticised PVC layer, from which they can be removed by washing. The highly plasticised PVC layer also has valuable anti-slip properties.
A composite material comprising a layer of highly-plasticised polyvinylchloride, comprising 15 to 45% of polyvinylchloride and 55 to 85% by weight of a plasticiser, a fibrous backing, and an intermediate barrier layer of a non-foamed polymeric material between the highly-plasticised polyvinylchloride layer and the backing and bonded to both, which material acts as a barrier to the migration of plasticiser from the highly-plasticised polyvinylchloride layer to or through the backing.
A composite sheet material comprising bonded together in sequence:
Dependencies are inferred from the claim text.