Article having a surface showing adhesive properties
First Claim
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1. An adhesive element comprising an adhesive layer, the adhesive layer comprising at least:
- a first zone comprising a first surface associated with a first set of surface properties and at least one second zone comprising a second surface constituting at least a part of the surface of the adhesive element, the second surface being associated with a second set of surface properties, the second set of surface properties differing from the first set of surface properties, wherein material as present in the second surface is obtainable by a heat treatment of material in the first surface, said material comprising a pressure sensitive adhesive composition.
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Abstract
It is an object of the invention to provide an adhesive element having an adhesive surface showing adhesive properties for adhering to a substrate wherein at least a part of the surface has been treated, resulting in alteration of the surface properties of the heat treated part of the surface. By heat treatment it is possible to provide an adhesive surface having parts showing different colour, water absorption properties, and/or adhesive properties.
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Citations
20 Claims
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1. An adhesive element comprising an adhesive layer, the adhesive layer comprising at least:
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a first zone comprising a first surface associated with a first set of surface properties and at least one second zone comprising a second surface constituting at least a part of the surface of the adhesive element, the second surface being associated with a second set of surface properties, the second set of surface properties differing from the first set of surface properties, wherein material as present in the second surface is obtainable by a heat treatment of material in the first surface, said material comprising a pressure sensitive adhesive composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of producing an adhesive element comprising an adhesive layer, the adhesive layer comprising at least a first zone having a first surface associated with a first set of surface properties and at least one second zone having a second surface constituting at least a part of the adhesive surface of the adhesive element, the second surface being associated with a second set of surface properties differing from the first set of surface properties, wherein material as present in the second surface is obtainable by a heat treatment of material in the first surface, said material comprising a pressure sensitive adhesive composition, said method comprising the steps of:
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providing an adhesive element comprising an adhesive layer, selecting a heat source, locating the adhesive layer and the heat source in a relationship enabling a heat treatment of the second surface of the adhesive layer, and heat treating the second surface with the selected heat source for a sufficient time for obtaining the second set of properties. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification