| 摘要 |
<p>An ostomy filter for colostomy and ileostomy bags is gas-permeable to allow venting, and liquid-impermeable to prevent leakage. It includes a hydrogen sulphide adsorbent to remove smells. The filter comprises 9 to 50 % by weight of particles of unsintered granular polytetrafluoroethylene (PTFE), 30 to 82 % by weight of particles of comminuted sintered expanded porous PTFE, and 9 to 30 % by weight of particulate water-insoluble H2S adsorbent. The particles are fused together by baking at elevated temperature to form a gas-permeable liquid-impermeable network. The comminuted sintered expanded porous PTFE is preferably formed by comminuting uniaxially expanded PTFE fibre.</p> |
