Adherence enhancing coating for plastic surfaces
AssigneeGradientech AB
InventorTobias KAMF
Life of this patent
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Abstract
A surface coating method comprises heating a coating solution comprising a gelling agent, at least one sulfate salt and water to a temperature above the melting temperature of the gelling agent but below 100 #C. The heated coating solution is applied onto a plastic surface (12). The coating solution is dried on the plastic surface (12) to obtain a pre-coated plastic surface, onto which a liquid hydrogel is applied. The liquid hydrogel is solidified to form a solid hydrogel (30) adhering to the pre-coated plastic surface. The surface coating (20) enhances the adherence between the solid hydrogel (30) and the plastic surface (12).
Claims42
-30. (canceled)
A surface coating method comprising:
- heating a coating solution comprising a gelling agent, at least one sulfate salt and water to a temperature above the melting temperature of the gelling agent but below 100° C.;
- applying the heated coating solution onto a plastic surface;
- drying the coating solution on the plastic surface to obtain a pre-coated plastic surface;
- applying a liquid hydrogel onto the pre-coated plastic surface;
- and
- solidifying the liquid hydrogel to form a solid hydrogel adhering to the pre-coated plastic surface.
A plastic article comprising:
- at least one pre-coated plastic surface obtainable by drying a heated coating solution applied onto at least one plastic surface of the plastic article and comprising a gelling agent, at least one sulfate salt and water, wherein the heated coating solution is heated to a temperature above the melting temperature of the gelling agent but below 100° C.;
- and
- a solid hydrogel on and adhering to the at least one pre-coated plastic surface.
A plastic article comprising at least one pre-coated plastic surface obtainable by drying a heated coating solution applied onto at least one plastic surface of the plastic article and comprising, preferably consisting of:
- a gelling agent at a concentration selected within an interval of from 0.05 to 0.50% w/w;
- at least one sulfate salt at a concentration selected within an interval of from 0.25 to 2.00% w/w;
- and
- water, wherein the heated coating solution is heated to a temperature above the melting temperature of the gelling agent but below 100° C.
An adherence enhancing coating solution for a plastic surface comprising:
- at least one sulfate salt at a concentration selected within an interval of from 0.25 to 2.00% w/w;
- a gelling agent at a concentration selected within an interval of from 0.05 to 0.50% w/w;
- and
- water.
Dependencies are inferred from the claim text.