Ostomy appliance

Patent metadata

Field	Value
Publication number	US-9289322-B2
Application number	US-201113995955-A
Country	US
Kind code	B2
Filing date	Dec 20, 2011
Priority date	Dec 22, 2010
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

An ostomy appliance comprising an adhesive wafer for attachment to the body, the wafer comprising a skin facing surface and a non skin-facing surface, the non skin-facing surface being provided with a backing layer, the skin facing surface of the wafer comprises a central area comprising a substantially non-absorbent protective adhesive, an intermediate area surrounding the central area, said area comprising a substantially non-absorbent soft adhesive, and an edge area surrounding the intermediate area, said edge area comprising a substantially non-absorbent protective adhesive.

First claim

The invention claimed is:

1. An ostomy appliance comprising an adhesive wafer for attachment to the body,
the wafer comprising:
a central aperture for accommodating a stoma;
a protective adhesive layer comprising a substantially non-absorbent adhesive, a skin facing surface, a non skin-facing surface, and an aperture substantially corresponding in shape to that of the central aperture of the wafer, the non-absorbent protective adhesive provided in an edge area, an intermediate area, and a central area of the wafer, the central area adjacent to the central aperture of the wafer, wherein substantially all of the non skin-facing surface of the protective adhesive layer is covered by a backing layer; the skin facing surface of the wafer comprises
a soft adhesive layer comprising a substantially non-absorbent soft adhesive provided in said intermediate area of the wafer surrounding the central area of the wafer; wherein a peel strength of the soft adhesive of the soft adhesive layer is less than a peel strength of the protective adhesive of the protective adhesive layer provided in the central area or the edge area of the wafer, and the soft and protective adhesives are not hydrocolloid adhesives; and
an absorbent layer located at a central or intermediate portion of the skin-facing surface of the protective adhesive layer between the protective adhesive layer and the soft adhesive layer;

wherein portions of the soft adhesive layer cover both a portion of an outer edge area of the skin-facing side of the absorbent layer and a portion of the skin facing side of the protective adhesive layer peripheral to the outer edge area of the absorbent layer.

2. The appliance according to claim 1 , wherein the soft adhesive comprises a cross-linked adhesive.

3. The appliance according to claim 1 , wherein the soft adhesive is silicone based.

4. The appliance according to claim 1 , wherein the protective adhesive is selected from the group of synthetic homo-, co- or block- copolymers, polyacrylate and copolymerisates thereof, polyurethane, silicone, polyisobutylene, polyvinyl ether and natural or synthetic resins or mixtures.

5. The appliance according to claim 1 , wherein soft adhesive has peel force above 0.5 N/25 mm on steel.

6. The appliance according to claim 1 , wherein soft adhesive has peel force from 1 N/25 mm to 10 N/25 mm on steel.

7. The appliance according to claim 1 , wherein the protective adhesive has peel force above 2 N/25 mm on steel.

8. The appliance according to claim 1 , wherein the protective adhesive has peel force from 3 N/25 mm to 20 N/25 mm.

9. The appliance according to claim 1 , wherein the soft adhesive layer is provided with a plurality of holes.

10. The appliance according to claim 1 , wherein the intermediate area constitutes at least 50% of the skin-facing surface.

11. The appliance according to claim 1 , further comprising a detachable collecting pouch that is attachable to the non skin-facing surface of the adhesive wafer.

12. The appliance according to claim 11 , wherein the collecting pouch is integrated with the wafer.

13. An adhesive wafer for attaching an ostomy appliance to a body, the wafer comprising:
a central aperture for accommodating a stoma;
a protective adhesive layer comprising a substantially non-absorbent adhesive, a skin facing surface, a non skin-facing surface, and an aperture substantially corresponding in shape to that of the central aperture of the wafer, the non-absorbent protective adhesive provided in an edge area, an intermediate area, and a central area of the wafer, the central area adjacent to the central aperture of the wafer, wherein substantially all of the non skin-facing surface of the protective adhesive layer is covered by a backing layer;
a soft adhesive layer comprising a substantially non-absorbent soft adhesive provided in the intermediate area of the wafer surrounding the central area of the wafer; wherein the soft adhesive of the soft adhesive layer has a complex modulus G* of less than 100kPa measured at 32° C. and 1 Hz; and , and the soft and protective adhesives are not hydrocolloid adhesives; and
an absorbent layer disposed at an intermediate portion of the skin-facing surface of the protective adhesive layer between the protective adhesive layer and the soft adhesive layer;

wherein portions of the soft adhesive layer cover both a portion of an outer edge area of the skin-facing side of the absorbent layer and a portion of the skin facing side of the protective adhesive layer peripheral to the outer edge area of the absorbent layer.

14. The adhesive wafer according to claim 13 , wherein the soft adhesive has a complex modulus G* of between about 1 kPa and about 30 kPa measured at 32° C. and 1 Hz.

15. An adhesive wafer for attaching an ostomy appliance to a body, the wafer comprising:
a central aperture for accommodating a stoma;
a protective adhesive layer comprising a substantially non-absorbent adhesive, a skin facing surface, a non skin-facing surface, and an aperture substantially corresponding in shape to that of the central aperture of the wafer, the non-absorbent protective adhesive provided in an edge area, an intermediate area, and a central area of the wafer, the central area adjacent to the central aperture of the wafer, wherein substantially all of the non skin-facing surface of the protective adhesive layer is covered by a backing layer;
a soft adhesive layer comprising a substantially non-absorbent soft adhesive provided in the intermediate area of the wafer surrounding the central area of the wafer; wherein the soft and protective adhesives are not hydrocolloid adhesives; and
an absorbent layer located at an intermediate portion of the skin-facing surface of the protective adhesive layer between the protective adhesive layer and the soft adhesive layer;

wherein portions of the soft adhesive layer cover both a portion of an outer edge area of the skin-facing side of the absorbent layer and a portion of the skin facing side of the protective adhesive layer peripheral to the outer edge area of the absorbent layer.

16. The adhesive wafer according to claim 15 , wherein the absorbent layer consists of an absorbent material or mixtures of absorbent materials.

Assignees

• Lam Peter Kwok Hing
• Coloplast As

Inventors

• Lam Peter Kwok Hing

Classifications

• A61F5/443 Primary

  having {adhesive seals for securing to the body, e.g. of} hydrocolloid type seals, e.g. gels, starches, karaya gums · CPC title

• A61L24/001

  Use of materials characterised by their function or physical properties · CPC title

• C08L83/04

  Polysiloxanes · CPC title

• A61L24/046

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds (A61L24/043 takes precedence) · CPC title

• A61L24/06

  obtained by reactions only involving carbon-to-carbon unsaturated bonds {(A61L24/043, A61L24/046 take precedence)} · CPC title