Abstract: An alkali-disposable ostomy bag has a pouch with flange for attachment to the patient. The flange is formed from two discs one of which is relatively thin and alkali disposable and is permanently attached to the pouch. The other disc is thicker, with a hydrocolloid surface, and is attached with the disc on the pouch by a peel-off adhesive. After use, the bag is removed from the patient and the thicker disc is peeled off the thinner disc so that it can be disposed of. The adhesive remains on the thinner disc so that the pouch can be sealed and disposed of by adding an alkali to a wc pan.

Abstract: A wc-disposable ostomy bag has walls made of three layers. The central layer is of an alkali-soluble/water-resistant material such as carboxylated acrylic polymer and is about 100.mu. thick. The inner layer, presented to the contents of the bag, is of a water-resistant, ordor-proof material such as polyvinylidene chloride and is between about 2 and 3.mu. thick. The outer layer is a non-woven material such as formed by cellulose fibres in a binder of aqueous polyacrylate, which is broken up when wetted by an alkaline liquid.