Re-usable, cleanable filter with porous support - carrying open structure layer removing solid or liq. particles, esp. for air purification

摘要

A filter consists of (a) a support, pref. porous, on which there is formed or applied (b) a coating or film of open structure by which solid or liq. particles are removed from a fluid passed through the support. The support is pref. formed from compressed glass fibres and/or ceramic fibres and/or C fibres and/or metal fibres. The coating layer may be formed separately and then bonded or attached to the support, or esp. a substance in soln. or as a liq. may be applied to the support, followed by evapn. of the solvent and/or polymerisation of the coating layer. The substance may be organic, esp. a synthetic and/or inorganic. Claimed substances are Na and/or K water glass and/or silicones and/or 'Teflon'.