| 摘要 |
PCT No. PCT/GB95/02337 Sec. 371 Date Apr. 4, 1997 Sec. 102(e) Date Apr. 4, 1997 PCT Filed Oct. 3, 1995 PCT Pub. No. WO96/11293 PCT Pub. Date Apr. 18, 1996Non-woven fiber fabrics are described, suitable for use in self-supporting dust filter units having at least one passage (10) defined by wall portions (12) made from air permeable fiber fabric through which wall portions (12) air can pass a d be drawn off along the passage (10) but which prevent the passage therethrough of dust and/or other debris carried by the air. The non-woven fabrics are blends of high temperature resistant fibers. A preferred blend consists of 50% by weight polyimide fibers and 50% by weight aramid fibers, but may include glass fibers, polytetrafuoroethylene fibers, or others and may optionally include an amount of heat activated fibers having a relatively high melting point for example, polyphenylene sulphide fibers. |
