Pressure-sensitive adhesives having microstructured surfaces
Assignee3M Innovative Properties Company
InventorsMieczyslaw H. Mazurek, Robert K. Galkiewicz, Gerald M. Benson
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Abstract
The invention provides pressure-sensitive adhesive (PSA) coated articles, including tapes and transfer coatings, having microstructured surfaces and methods of making pressure-sensitive adhesive articles bearing such microstructured surfaces. The performance properties of the pressure-sensitive adhesive articles can be tailored by independently varying the microstructure and the rheological properties of the pressure-sensitive adhesive.
Claims26
A coated substrate comprising a substrate coated on at least one side with a continuous layer of an unfilled pressure-sensitive adhesive, the pressure sensitive adhesive having a microstructured surface, wherein the microstructured surface of the pressure-sensitive adhesive comprises a series of features, each of the features having a height of about 2.5 to about 375 micrometers, and wherein at least two of three dimensions of each feature selected from the group consisting of (i) length, (ii) width, and (iii) depth or height are microscopic, wherein “microscopic” refers to features of small enough dimensions so as to require an optic aid to the naked eye when viewed from any plane of view to determine its shape.
Dependencies are inferred from the claim text.