Blow-moulding of ostomy bags

• US 20150265454A1
• Filed: 10/22/2013
• Published: 09/24/2015
• Est. Priority Date: 10/23/2012
• Status: Active Grant

• Current Assignee: Coloplast A/S
• Original Assignee: Coloplast A/S
• Inventors: Oeelund, Jakob
• Granted Patent: US 10,105,254 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61F 5/44 Devices worn by the patient for reception of urine, faeces, catamenial or other discharge; Portable urination aidsabsorbent pads, e.g. sanitary towels, A61F13/15; drainage appliances for wounds A61M27/00; emptying devices for urine bags B65B69/0016; Colostomy devices adhesives for colostomy devices A61L24/00; materials for colostomy devices A61L28/00
• CPC Class Codes: A61F 5/4404 Details or parts
• CPC Class Codes: A61F 5/443 having adhesive seals for securing to the body, e.g. of hydrocolloid type, e.g. gels, starches, karaya gums adhesives or sealing pads therefor A61L24/00
• CPC Class Codes: B29C 2049/023 using inherent heat of the preform, i.e. 1 step blow moulding
• CPC Class Codes: B29C 2049/2017 outside the article
• CPC Class Codes: B29C 2949/0715 the preform having one end closed
• CPC Class Codes: B29C 45/0055 Shaping
• CPC Class Codes: B29C 45/1684 Injecting parison-like articles B29C45/1625, B29C45/1643 and B29C45/1646 take precedence
• CPC Class Codes: B29C 49/06 Injection blow-moulding
• CPC Class Codes: B29C 49/20 of articles having inserts or reinforcements ; Handling of inserts or reinforcements
• CPC Class Codes: B29C 49/24 Lining or labelling
• CPC Class Codes: B29L 2031/7148 Blood bags, medical bags

Abstract

An ostomy collecting bag is provided. The collecting bag has a continuous wall with a curvature instead of sealed edges. The collecting bag is truly three-dimensional. The collecting bag may be obtained by injection blow-moulding or extrusion blow-moulding. Methods of producing an ostomy collecting bags by either injection blow-moulding or extrusion blow-moulding is also provided. In injection blow-moulding, a pre-form is injection moulded and subsequently the pre-form is blow-moulded into an ostomy collecting bag. In extrusion blow-moulding, a tube is extruded and subsequently blow-moulded into an ostomy collecting bag. The ostomy collecting bag can thus be made without seals at the edges, which provides a more flexible collecting bag with a larger interior volume.

Claims

1. A collecting bag for use in an ostomy appliance, where the collecting bag comprises a generally continuous foil material defining a continuous wall of the collecting bag, with a front of the wall facing away from the user and a rear of the wall facing the user, where the transition between the front of the wall and the rear of the wall is smooth and defines a rounded curvature.

4. The collecting bag as claimed in claim 1 that is obtained by injection blow-moulding.

5. The collecting bag as claimed in claim 1 that is obtained by extrusion blow-moulding.

6. The collecting bag as claimed in any of the preceding claims, wherein the collecting bag is provided with a waste inlet opening.

7. The collecting bag as claimed in any of the preceding claims, wherein the thickness of the wall of the collecting bag is between 50 μ

m and 200 μ

m.

8. The collecting bag as claimed in any of the preceding claims, wherein the collecting bag is soft and flexible.

9. The collecting bag as claimed in any of the preceding claims, wherein the wall of the collecting bag has a tensional modulus of between 50 N/mm² and 500 N/mm², preferably between 100 N/mm² and 150 N/mm².

10. The collecting bag as claimed in any of the preceding claims, wherein the collecting bag is designed so that it provides a better fit to the body of the user.

11. The collecting bag as claimed in any of the preceding claims, comprising a variation in the rigidity over the wall of the collecting bag.

12. The collecting bag as claimed in claim 11, wherein the front of the wall of the bag is more rigid than the rear of the wall of the bag.

13. The collecting bag as claimed in any of the preceding claims, wherein the thickness of the wall of the collecting bag varies.

14. The collecting bag as claimed in any of the preceding claims, wherein the collecting bag is provided with a ribbed structure.

15. The collecting bag according to claim 14, wherein the bag that is expandable when filled.

16. The collecting bag according to claim 14 or 15, wherein the ribs are provided as alternating ribs and grooves extending transversely across the collecting bag.

17. The collecting bag according to claim 14 or 15, wherein the ribs are provided as alternating ribs and grooves extending longitudinally along the collecting bag.

18. The collecting bag as claimed in any of the preceding claims, wherein at least part of the collecting bag is provided with flex-zones.

19. An ostomy appliance comprising a collecting bag according to any of the preceding claims and a wafer attachable to a user.

20. A one-piece ostomy appliance comprising a collecting bag as claimed in any of claims 1 to 19 and attachment means in form of a wafer directly attached to the collecting bag and adapted for directly adhering to the abdominal surface of a user.

21. A two-piece ostomy appliance comprising a collecting bag as claimed in any of claims 1 to 19 and attachment means in form of coupling means adapted for releasably coupling to matching coupling means positioned at a wafer that in turn may be adhered to the abdominal surface of a user.

2. A collecting bag for use in an ostomy appliance wherein the collecting bag is obtained by injection blow-moulding.

3. A collecting bag for use in an ostomy appliance that is obtained by extrusion blow-moulding.

22. A method of producing an ostomy collecting bag comprising the steps of

a). Injection moulding a pre-form

b). Inserting the pre-form into a blow-moulding machine

c). Blow-moulding the ostomy collecting bag

23. The method according to claim 22, further including inserting a filter into the mould prior to injection moulding the pre-form.

24. The method according to any of claim 22 or 23, wherein the blow-moulding mould is provided with a net-structure or a ribbed structure in the surface of the blow-moulding mould.

25. The method according to any of claims 22 to 24, further including inserting attachment means into the mould prior to injection moulding the pre-form.

26. The method according to any of claims 22 to 25, wherein a cover layer is inlayed in the blow-moulding mould prior to blow-moulding the collecting bag.

27. The method according to any of claims 22 to 26, wherein the pre-form is moulded in a two-component moulding so that one part of the pre-form is provided by one type of material and the other is provided of another type of material.

28. A method of producing a collecting bag for use in an ostomy appliance comprising the steps of

a). Extruding an endless tube

b). Inserting a length of the tube into a blow-moulding machine

c). Blow-moulding the collecting bag in a blow-moulding mould

29. The method according to claim 28, wherein the blow-moulding mould is provided with a net-structure or a ribbed structure in the surface of the blow-moulding mould.

30. The method according to any of claim 28 or 29, further includes inserting attachment means into the mould prior to blow-moulding the collecting bag.

31. The method according to any of claims 28 to 30, wherein a cover layer is inlayed in the blow-moulding mould prior to blow-moulding the collecting bag.