Semi-interpenetrating network polymer backsheet bandage

• US 4,832,009 A
• Filed: 12/23/1987
• Issued: 05/23/1989
• Est. Priority Date: 12/23/1987
• Status: Expired due to Term

• Current Assignee: Bio Med Sciences Incorporated (Uluru Inc.)
• Original Assignee: Bio Med Sciences Incorporated (Uluru Inc.)
• Inventors: Dillon, Mark E.
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): PREBILIC, PAUL B
• Application Number:
  US07/137,418
• Time in Patent Office: 517 Days
• Field of Search: 128/155, 128/156, 128/DIG. 21, 604/304, 604/307, 106/176, 428/172, 523/111, 424/443, 424/447
• US Class Current: 602/58
• CPC Class Codes: A61F 13/0203 with fluid retention members
• CPC Class Codes: A61F 13/023 wound covering film layers without a fluid retention layer
• CPC Class Codes: A61F 2013/00846 with transparent or translucent part
• CPC Class Codes: A61F 2013/00863 with pores
• CPC Class Codes: A61L 15/225 Mixtures of macromolecular compounds
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: Y10T 428/24612 Composite web or sheet

Abstract

An improved bandage comprises a backing sheet constructed of a semi-interpenetrating polymer network. Use of a semi-interpenetrating polymer network allows for an extremely desirable combination of gas permeability and hydrostatic resistance. This construction of backing sheet provides for suitable vapor permeability and sufficient water impermeability because the pores therein are of a colloidal size range and the surface tension thereof results in the backing material being hydrophobic.

Claims

1. A bandage comprising:

a backing sheet comprising a gas permeable, water impermeable membrane which consists essentially of a semi-interpenetrating polymer network; and

a fastening means whereby said bandage is affixed to an affected area to a patient.

2. A bandage as recited in claim 1 in which said semi-interpenetrating polymer network comprises fibrillated polytetrafluoroethylene and crosslinked polyorganosiloxane.

3. A bandage as recited in claim 1 in which said fastening means consists of a pressure sensitive adhesive.

4. A bandage as recited in claim 1 in which said backing sheet is waterproof up to 200 psi.

5. A bandage as recited in claim 1 in which said backing sheet is transparent.

6. A bandage as recited in claim 1 in which said backing sheet is translucent.

7. A bandage comprising:

a backing sheet comprising a gas permeable water impermeable membrane which consists essentially of a semi-interpenetrating polymer network;

a fastening means for affixing said bandage to an affected area of a patient; and

an absorbent means for absorbing discharge from the affected area.

8. A bandage as recited in claim 7 in which said semi-interpenetrating polymer network comprises fibrillated polytetrafluoroethylene and crosslinked polyorganosiloxane.

9. A bandage as recited in claim 7 wherein said absorbant means consists of gauze.

10. A bandage as recited in claim 7 in which said fastening means consists of a pressure sensitive adhesive.

11. A bandage as recited in claim 7 in which said backing sheet is waterproof up to 200 psi.

12. A bandage as recited in claim 7 in which said backing sheet is transparent.

13. A bandage as recited in claim 7 in which said backing sheet is translucent.