HOLLOW FILAMENT ENCAPSULATING THEREIN ENZYME, MICROORGANISM OR BOTH AND PREPARATION THEREOF

摘要

1422854 Encapsulated enzymes and microorganisms ASAHI KASEI KOGYO KK 1 Aug 1973 [4 Aug 1972] 36612/73 Heading B8C [Also in Divisions C3 and C6] " Fixed " preparations containing enzymes and/or microorganisms comprise a solution or suspension of the said materials contained within a hollow filament (with open or closed ends) of a water-permeable polymer selected from: polyacrylonitrile, polymethacrylonitrile, cellulose acetate, cellulose acetate phthalate, hydroxypropyl methyl cellulose phthalate, hydroxypropyl methyl cellulose trimellitate, vinyl chloride-vinyl acetate copolymer, polyurethane, polysulphone and copolymers containing any of these as principal components. The water-permeability of the polymer is preferably at least 0À1 ml./cm.2 min. atm. and the external and internal diameters of the filament should be from 0À1 to 1-5 mm. and from 0À06 to 1À3 mm. respectively. The filled filaments may be prepared by concentric extrusion of a solution of the wall material and fill material into a precipitating bath for the polymer.