Medical articles using miscible composition
Assignee3M Innovative Properties Company
InventorsDAVID R. HOLM, DONG-WEI ZHU
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Abstract
Provided is a medical article with improved moisture vapor transmission rate of the pressure sensitive adhesive layer with a miscible composition. The medical article has a backing, a pressure sensitive adhesive layer with acid-functional groups or basic-functional groups, an MVTR-modifying composition that is basic when the PSA comprises an acidic-functional group or is acidic when the PSA comprises a basic-functional group, and a filtration layer disposed between the MVTR-modifying layer and the PSA layer. The MVTR-modifying composition is miscible with the PSA, and contact between the MVTR-modifying composition and the PSA causes an acid-base reaction to form a poly-salt and increase moisture permeability of at least a portion of the PSA layer.
Claims20
A medical article comprising:
- a backing having a first major surface and a second major surface;
- a PSA layer disposed on at least a portion of the first major surface of the backing, wherein the PSA layer comprises a PSA comprising acid-functional groups or basic-functional groups;
- an MVTR-modifying layer comprising an MVTR-modifying composition that is basic when the PSA comprises an acidic-functional group or is acidic when the PSA comprises a basic-functional group;
- and
- a filtration layer disposed between the MVTR-modifying layer and the PSA layer;
- wherein the MVTR-modifying composition is miscible with the PSA, and contact between the MVTR-modifying composition and the PSA causes an acid-base reaction to form a poly-salt and increase moisture permeability of at least a portion of the PSA layer.
A medical article comprising:
- a backing having a first major surface and a second major surface;
- a PSA layer disposed on at least a portion of the first major surface of the backing, wherein the PSA layer comprises a PSA comprising acid-functional groups or basic-functional groups;
- an MVTR-modifying layer comprising an MVTR-modifying composition that is basic when the PSA comprises an acidic-functional group or is acidic when the PSA comprises a basic-functional group, wherein the MVTR-modifying composition is miscible with the PSA;
- a filtration layer disposed between the MVTR-modifying layer and the PSA layer;
- and
- ionic groups non-uniformly distributed throughout the PSA layer, wherein the ionic groups are formed from a reaction of the PSA functional groups and the MVTR-modifying composition.
Dependencies are inferred from the claim text.