Pressure-sensitive pvc cover strip
AssigneeCarlisle Intangible Company
InventorMichael J. Scanish
Life of this patent
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Abstract
A PVC-based cover strip designed to bond to non-PVC materials as well as PVC materials includes a PVC layer coated with a barrier effective to prevent migration of plasticizers from the PVC layer. The barrier layer, in turn, is coated with a primer and subsequently a pressure-sensitive adhesive. The barrier layer is generally a polar polymer, such as acrylonitrile rubber which resists migration of phthalate plasticizers. The pressure-sensitive adhesive layer is a pressure-sensitive adhesive suitable for use in roofing applications.
Claims17
A PVC cover strip for sealing a transition from a metal facia strip to a PVC membrane on a roof, the PVC cover strip comprising:
- a PVC layer having a first surface and a second surface, the first surface configured to be exposed to weather;
- a barrier layer coating the second surface, the barrier layer being effective to prevent chemical migration from the PVC layer from passing through the barrier layer;
- a primer layer coating the barrier layer and defining opposing edges across a width;
- and
- a pressure-sensitive adhesive layer coating the primer layer and extending from one edge of the primer layer to an opposing edge of the primer layer to bond to each of the metal facia strip and to the PVC membrane.
A method of manufacturing a PVC cover strip comprising:
- applying a barrier layer to a PVC layer;
- the barrier layer being effective to prevent chemical migration from the PVC layer from passing through the barrier layer;
- allowing the barrier layer to set;
- coating the set barrier layer with a primer layer;
- allowing the primer layer to set;
- and
- laminating the set primer layer with a pressure-sensitive adhesive layer and a release sheet,
- wherein following laminating, the pressure-sensitive adhesive layer extends from one edge of the primer layer to an opposing edge of the primer layer.
Dependencies are inferred from the claim text.