Extensible dressings

Patent metadata

Field	Value
Publication number	US-12268576-B2
Application number	US-201815950341-A
Country	US
Kind code	B2
Filing date	Apr 11, 2018
Priority date	Apr 11, 2017
Publication date	Apr 8, 2025
Grant date	Apr 8, 2025

Abstract

The present invention relates to dressings such as bandages or tapes having improved extensibility and conformability to human skin and joints.

First claim

What is claimed is:

1. An adhesive bandage comprising:
(a) a dressing comprising a layer of material comprising a laminate having a nonwoven layer comprising polyester fibers and a nonstick, high density polyethylene net, the layer of material having a plurality of material free regions, wherein:
(i) the material free regions are in the form of curvilinear sigmoid pattern units, the curvilinear sigmoidal pattern units having dimensions and oriented and arranged in a regular array such that the layer of material has a Stretchability Testxy extension in at least one of a 45° diagonal direction of at least 1125% more than the same layer of material without material free regions when applying a force of from 0.2 kgf along such 45° diagonal direction of the layer of material; and
(ii) the curvilinear sigmoidal pattern units have a width w and a length I, and further wherein the length I of the curvilinear sigmoidal pattern unit is from 1 to 6 times the width w of the curvilinear sigmoidal pattern unit; and

(b) a backing layer comprising an elastomeric film having an adhesive disposed on a major surface thereof and being adhered to the nonwoven layer of the laminate;
wherein, upon application of the adhesive bandage to a user's skin in a substantially unstressed condition, the dressing is capable of stretching with the skin during use to minimize detachment of the dressing therefrom.

2. The adhesive bandage of claim 1 , wherein the material free regions are cuts or slits in the layer of material.

3. The adhesive bandage of claim 1 , wherein the curvilinear sigmoidal pattern units are non-intersecting and arranged adjacent to one another to form one or more linear rows.

4. The adhesive bandage of claim 3 , wherein the linear rows are parallel to each other.

5. The adhesive bandage of claim 1 , wherein each curvilinear sigmoidal pattern unit has a top and further wherein the bottom of any curvilinear sigmoidal pattern unit in a row is aligned with the top and bottom of the other curvilinear sigmoidal pattern units in that row.

6. The adhesive bandage of claim 1 , wherein the length/of at least one curvilinear sigmoidal pattern unit is oriented perpendicular to the length/of an adjacent curvilinear sigmoidal pattern unit.

7. The adhesive bandage of claim 6 , wherein the length l of each curvilinear sigmoidal pattern unit in a row is oriented perpendicular to the length l of its adjacent curvilinear sigmoidal pattern unit in the row.

8. The adhesive bandage of claim 1 , wherein the surface density of curvilinear sigmoidal pattern units per square inch of the surface of the layer of material is from 10 pattern units/in 2 to 14 pattern units/in 2 of the surface of the layer of material.

9. The adhesive bandage of claim 1 , wherein the layer of material has a Stretchability Testxy extension in at least one of the 45° diagonal directions of at least 1725% more than the same layer of material without material free regions, when applying a force of from 0.3 kgf along such 45° diagonal direction of the layer of material.

10. The adhesive bandage of claim 1 , wherein the layer of material has a Stretchability Testxy extension in at least one of the 45° diagonal directions of at least 1650% more than the same layer of material without material free regions, when applying a force of from 0.4 kgf along such 45° diagonal direction of the layer of material.

11. The adhesive bandage of claim 1 , wherein the layer of material has a Stretchability Testxy extension in at least one of the longitudinal or transverse directions of at least 100% more than the same layer of material without material free regions, when applying a force of from 0.1 kgf along such longitudinal or transverse direction of the layer of material.

12. The adhesive bandage of claim 1 , wherein the layer of material has a Stretchability Testxy extension in at least one of the longitudinal or transverse directions of at least 150% more than the same layer of material without material free regions, when applying a force of from 0.2 kgf along such longitudinal or transverse direction of the layer of material.

13. The adhesive bandage of claim 1 , wherein the layer of material has a Stretchability Testxy extension in at least one of the longitudinal or transverse directions of at least 425% more than the same layer of material without material free regions when applying a force of from 0.3 kgf along such longitudinal or transverse direction of the layer of material.

14. The adhesive bandage of claim 11 , wherein the layer of material has a Stretchability Testxy extension in the other longitudinal or transverse direction of at least 75% more than the same layer of material without material free regions when applying a force of from 0.1 kgf along such other longitudinal or transverse direction of the layer of material.

15. The adhesive bandage of claim 12 , wherein the layer of material has a Stretchability Testxy extension in the other longitudinal or transverse direction of at least 150% more than the same layer of material without material free regions when applying a force of from 0.2 kgf along such other longitudinal or transverse direction of the layer of material.

16. The adhesive bandage of claim 1 , wherein the layer of material has a Stretchability Testz extension of at least 1 mm to 8 mm away from the xy-plane of the layer of material when applying a force of 0.5 kgf along the z direction of the layer of material.

17. The adhesive bandage of claim 1 wherein the backing layer comprises a polyurethane film.

18. The adhesive bandage of claim 17 wherein the backing layer further comprises a woven fabric.

19. The adhesive bandage of claim 1 wherein the wherein the length l of the curvilinear sigmoidal pattern unit is from 2.5 to 6 times the width w of the curvilinear sigmoidal pattern unit.

Assignees

• Johnson & Johnson Consumer Inc
• Kenvue Brands Llc

Inventors

• Caneppele Leonardo
• Narcizo Andre
• Oriani Paulo Cesar De Godoy
• Rizzo Carmine
• Santos Andre Luiz

Classifications

• A61L15/26

  Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof {(A61L15/225 takes precedence)} · CPC title

• A61F13/0243

  characterised by the properties of the skin contacting layer, e.g. air-vapor permeability · CPC title

• A61F13/0206

  with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings · CPC title

• A61F13/01038

  Flexibility, stretchability or elasticity · CPC title

• A61F13/01025 Primary

  made of a single layer · CPC title