NON-WOVEN FIBRE FABRIC AND METHOD OF MAKING THE FABRIC

摘要

Non-woven fibre 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 fibre fabric through which wall portions (12) air can pass and 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 fibres. A preferred blend consists of 50 % by weight polyimide fibres and 50 % by weight aramid fibres, but may include glass fibres, polytetrafluoroethylene fibres, or others and may optionally include an amount of heat activated fibres having a relatively high melting point for example, polyphenylene sulphide fibres.