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公开(公告)号：US20190091626A1
公开(公告)日：2019-03-28
申请号：US16094833
申请日：2017-04-20
Applicant: 3M INNOVATIVE PROPERTIES COMPANY , DMF MEDICAL INCORPORATED
Inventor： Ina Voigt , Wolfgang Ansorge , Florentin Wilfart , Michael Schmidt , Jan Haelssig
Abstract: Hydrophobic poly(4-methyl-1-pentene) hollow fiber membrane for retention of anesthetic agents with an inner and an outer surface and between inner and outer surface an essentially isotropic support layer with a sponge-like, open-pored, microporous structure free of macrovoids and adjacent to this support layer on the outer surface a dense separation layer with a thickness between 1.0 and 3.5 μm. The membrane has a porosity in the range of greater than 35% to less than 50% by volume and a permeance for CO2 of IN 20-60 mol/(h·m2·bar), a gas separation factor α(CO2/N2) of at least 5 and a selectivity CO2/anesthetic agents of at least 150. The process of for producing this membrane is based on a thermally induced phase separation process in which process a homogeneous solution of a poly(4-methyl-1-pentene) in a solvent system containing components A and B is formed, wherein component A is a strong solvent and component B a weak non-solvent for the polymer component. After formation of a hollow fiber the hollow fiber is cooled in a liquid cooling medium to form a hollow fiber membrane. The concentration of the polymer component in the solution may be in the range from 42.5 to 45.8 wt.-% and the hollow fiber leaving the die runs through a gap between die and cooling medium with a gap length in the range of 5-30 mm.
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公开(公告)号：US20210170328A1
公开(公告)日：2021-06-10
申请号：US17154878
申请日：2021-01-21
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Ina Voigt , Wolfgang Ansorge , Florentin Wilfart , Michael Schmidt , Jan Haelssig
Abstract: Hydrophobic poly(4-methyl-1-pentene) hollow fiber membrane for retention of anesthetic agents with an inner and an outer surface and between inner and outer surface an essentially isotropic support layer with a sponge-like, open-pored, microporous structure free of macrovoids and adjacent to this support layer on the outer surface a dense separation layer with a thickness between 1.0 and 3.5 μm. The membrane has a porosity in the range of greater than 35% to less than 50% by volume and a permeance for CO2 of 20-60 mol/(h·m2·bar), a gas separation factor α(CO2/N2) of at least 5 and a selectivity CO2/anesthetic agents of at least 150.
The process for producing this membrane is based on a thermally induced phase separation process in which process a homogeneous solution of a poly(4-methyl-1-pentene) in a solvent system containing components A and B is formed, wherein component A is a strong solvent and component B a weak non-solvent for the polymer component. After formation of a hollow fiber the hollow fiber is cooled in a liquid cooling medium to form a hollow fiber membrane. The concentration of the polymer component in the solution may be in the range from 42.5 to 45.8 wt.-% and the hollow fiber leaving the die runs through a gap between die and cooling medium with a gap length in the range of 5-30 mm.-
公开(公告)号：US10926214B2
公开(公告)日：2021-02-23
申请号：US16094833
申请日：2017-04-20
Applicant: 3M INNOVATIVE PROPERTIES COMPANY , DMF MEDICAL INCORPORATED
Inventor： Ina Voigt , Wolfgang Ansorge , Florentin Wilfart , Michael Schmidt , Jan Haelssig
Abstract: Hydrophobic poly(4-methyl-1-pentene) hollow fiber membrane for retention of anesthetic agents with an inner and an outer surface and between inner and outer surface an essentially isotropic support layer with a sponge-like, open-pored, microporous structure free of macrovoids and adjacent to this support layer on the outer surface a dense separation layer with a thickness between 1.0 and 3.5 μm. The membrane has a porosity in the range of greater than 35% to less than 50% by volume and a permeance for CO2 of 20-60 mol/(h·m2·bar), a gas separation factor α(CO2/N2) of at least 5 and a selectivity CO2/anesthetic agents of at least 150. The process for producing this membrane is based on a thermally induced phase separation process in which process a homogeneous solution of a poly(4-methyl-1-pentene) in a solvent system containing components A and B is formed, wherein component A is a strong solvent and component B a weak non-solvent for the polymer component. After formation of a hollow fiber the hollow fiber is cooled in a liquid cooling medium to form a hollow fiber membrane. The concentration of the polymer component in the solution may be in the range from 42.5 to 45.8 wt.-% and the hollow fiber leaving the die runs through a gap between die and cooling medium with a gap length in the range of 5-30 mm.
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