| 摘要 |
<p>PCT No. PCT/GB93/00232 Sec. 371 Date Sep. 16, 1994 Sec. 102(e) Date Sep. 16, 1994 PCT Filed Feb. 4, 1993 PCT Pub. No. WO93/14722 PCT Pub. Date Aug. 5, 1993.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> |
