Method of forming an ostomy pouch
AssigneeConvatec Limited
InventorsKevin Evans, Mark Jones
Life of this patent
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Abstract
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.
Claims24
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 greater than the second temperature;
- and/or the first pressure is greater than the second pressure;
- and/or the first time period is greater than the second time period.
A method according to any preceding claim wherein the method further comprises providing a second comfort layer.
A method according to any preceding claim wherein the first and second cavity walls are joined by heat welding.
A method according to any preceding claim wherein the one or more comfort layers are joined by heat activated adhesion.
A method according to any preceding claim wherein the temperature and pressure are applied by at least one die.
A method according to any preceding claim, the method further comprising arranging the or each comfort layer with the hot melt adhesive adjacent to the cavity wall prior to joining.
A method according to any preceding claim wherein the hot melt adhesive is a web comprising a mass and a plurality of voids in the mass.
A method according to any preceding claim wherein the woven comfort material comprises polyester.
A method according to any preceding claim wherein the hot-melt adhesive comprises ethylene-vinyl acetate (EVA).
A method according to any preceding claim 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.
A method according to any preceding claim wherein the first time period is between 500 ms and 750 ms and the second time period is between 500 ms and 750 ms.
A method according to any preceding claim, the method 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.
A method according to any preceding claim wherein the first temperature is greater than the second temperature and the first pressure is greater than the second pressure.
Dependencies are inferred from the claim text.