Enclosure ventilation filter and assembly method

An ostomy filter and an ostomy bag comprising:

• an ostomy bag defining a stoma opening and a vent opening;
• and
• an ostomy filter attached to the ostomy bag to cover the vent opening, the ostomy filter comprising:
• a bag side and a side opposite from the bag side, wherein the bag side of the ostomy filter is secured to the ostomy bag;
• a first layer which is gas permeable and liquid impermeable;
• and
• an adsorbent layer of adsorbent particles;
• wherein the bag side of the ostomy filter comprises:
• an adhesive zone in which adhesive is present, the adhesive zone having an outer adhesive perimeter and an inner adhesive perimeter, wherein the inner adhesive perimeter surrounds an exit opening, wherein the adhesive attaches the ostomy filter and the ostomy bag at the adhesive zone;
• and
• a weld area surrounding the adhesive zone, where the filter assembly is heat-sealable to the ostomy bag at the weld area, wherein the ostomy filter is attached by heat seal to the ostomy bag at the weld area.

A system of filter assemblies for an enclosure and a release liner, comprising:

• a release liner;
• and
• a plurality of filter assemblies located on the release liner, each filter assembly comprising:
• an enclosure side and a side opposite from the enclosure side;
• a first layer which is gas permeable;
• and
• an adsorbent layer comprising adsorbent particles;
• wherein the enclosure side of the filter assembly comprises:
• an adhesive zone in which adhesive is present having an outer adhesive perimeter;
• a weld area surrounding at least a portion of the adhesive zone, where the filter assembly is heat-sealable to the enclosure at the weld area.

A filter assembly for an enclosure, comprising:

• an enclosure side and a side opposite from the enclosure side;
• a first layer which is gas permeable;
• and
• an adsorbent layer comprising adsorbent particles;
• wherein the enclosure side of the filter assembly comprises:
• an adhesive zone in which adhesive is present having an outer adhesive perimeter;
• a weld area surrounding at least a portion of the adhesive zone, where the filter assembly is heat-sealable to the enclosure at the weld area.