Surgery – Respiratory method or device – Ozone or ion generation
Patent
1980-03-31
1981-12-08
McCamish, Marion
Surgery
Respiratory method or device
Ozone or ion generation
264 75, 428198, 428288, 428292, 428296, D04H 158
Patent
active
043042341
ABSTRACT:
Spun, non-woven fabrics from bonded polyolefin filaments deposited in a random fashion and comprising individual filaments and filament groups of at least two parallelized individual filaments, and at least a portion of the individual filaments and filament groups are modified by polar groups in ethylene oxide and/or propylene oxide adducts, added in the nature of fibrillae on the filament or filament group surfaces or by surface treatment thereof with ethylene oxide adducts of propylene oxide block polymers with at least 20% by weight of ethylene oxide; and processes for the production of such spun, non-woven fabrics wherein the polyolefin filaments are extruded from a multiplicity of spinnerets, which are then deposited in random fashion as a mixed fleece of individual and groups of parallelized filaments and wherein, during or after extrusion, adducts of the propylene oxide and/or of the ethylene oxide are added to the filaments and/or filament groups, after which the mixed fleece thus produced is bonded by autogenous bonding.
REFERENCES:
patent: 3509009 (1970-04-01), Hartmann
patent: 3554854 (1971-01-01), Hartmann
patent: 4107374 (1978-08-01), Kusunose
Carl Freudenberg
McCamish Marion
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