Method of forming an ostomy pouch
A method of forming an ostomy pouch comprising: providing a film to form a first cavity wall and a second cavity wall; providing a comfort material to form a comfort layer; wherein the comfort material is a woven fabric material with a hot melt adhesive coating thereon; joining the first cavity wall to the second cavity wall at a first temperature and a first pressure for a first time period; and subsequently joining a comfort layer to at least one of the first and second cavity walls at a second temperature and a second pressure for a second time period.
1. A method of forming an ostomy pouch; the method comprising:
providing a film to form a first cavity wall and a second cavity wall;
providing a comfort material to form a comfort layer; wherein the comfort material is a woven fabric material with a hot melt adhesive coating thereon;
joining the first cavity wall to the second cavity wall at a first temperature and a first pressure for a first time period; and subsequently joining a comfort layer to at least one of the first and second cavity walls at a second temperature and a second pressure for a second time period;
wherein the first temperature is less than the second temperature, the first pressure is about the same as that second pressure and the first time period is about equal to the second time period, thereby reducing the risk of damage to the comfort layer.
2. A method according to claim 1 wherein the join between the first cavity wall and second cavity wall overlaps the join between the comfort material and at least one of the first and second cavity walls.
3. A method according to claim 1 , comprising providing a second comfort layer, wherein one of the comfort layers is joined concurrently with the joining of the first and second cavity walls.
4. A method according to claim 3 wherein the comfort layer joined concurrently with the joining of the first and second cavity walls is a body facing comfort layer.
5. A method according to claim 1 , comprising providing a second comfort layer, wherein the two comfort layers are joined to the cavity walls concurrently.
6. A method according to claim 1 wherein the first and second cavity walls are joined by heat welding.
7. A method according to claim 1 wherein the one or more comfort layers are joined by heat activated adhesion.
8. A method according to claim 1 wherein the temperature and pressure are applied by at least one die.
9. A method according to claim 8 wherein temperature is applied by two dies on opposing sides of the join.
10. A method according to claim 9 wherein a different temperature is applied by each die.
11. A method according to claim 1 , further comprising arranging the comfort layer with the hot melt adhesive adjacent to the cavity wall prior to joining, wherein a portion of the hot melt adhesive remains unbonded after the comfort layer is joined to the cavity wall.
12. A method according to claim 1 , wherein the hot melt adhesive is a web comprising a mass and a plurality of voids in the mass.
13. A method according to claim 1 wherein the woven comfort material comprises polyester.
14. A method according to claim 1 wherein the hot-melt adhesive comprises ethylene-vinyl acetate (EVA).
15. A method according to claim 1 wherein the first temperature is between 100° C. and 150° C. and the second temperature is between 130° C. and 160° C.
16. A method according to claim 1 wherein the first pressure is between 2.5 bar and 2.7 bar and the second pressure is between 2.5 bar and 2.7 bar.
17. A method according to claim 1 wherein the first time period is between 500 ms and 750 ms and the second time period is between 500 ms and 750 ms.
18. A method according to claim 1 , the further comprising applying the hot melt adhesive coating to the comfort material prior to joining the comfort material to at least one of the cavity walls.
19. A method according to claim 1 , wherein the first temperature is greater than the second temperature and the first pressure is greater than the second pressure.
20. A method according to claim 19 wherein the first temperature is greater than the second temperature, the first pressure is greater than the second pressure and the first time period is equal to the second time period.