UST103601I4 - Process for preparation of microporous membranes of controlled flow characteristics - Google Patents
Process for preparation of microporous membranes of controlled flow characteristics Download PDFInfo
- Publication number
- UST103601I4 UST103601I4 US06/446,832 US44683282A UST103601I4 US T103601 I4 UST103601 I4 US T103601I4 US 44683282 A US44683282 A US 44683282A US T103601 I4 UST103601 I4 US T103601I4
- Authority
- US
- United States
- Prior art keywords
- membrane
- film
- drying
- preparation
- flow characteristics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0095—Drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/56—Polyamides, e.g. polyester-amides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
- B29C67/202—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored comprising elimination of a solid or a liquid ingredient
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/62—Processes of molding porous films
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249978—Voids specified as micro
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31725—Of polyamide
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
A dimensionally stabilized microporous polyamide membrane having enhanced flow characteristics comprised of a film forming organic polymeric material of low shrinkage prepared by drying the membrane, under conditions of restraint in the plane of the membrane to minimize the shrinkage until the membrane is essentially in a dried condition. A process is also described for preparing a microporous membrane designed to enhance incorporation and retention of a charge modifying resin for use as a charge modified filter media. The process comprises preparing a dope solution of a film forming polymer in a solvent system, directly casting the solution under the surface of a quenching medium comprising a non-solvent system for the polymer for a time sufficient to form micropores in the film, and drying the film while controlling the planar dimensions of the film during the drying.
The foregoing process is particularly useful in the preparation of a charge modified membrane of enhanced electrokinetic capture potential in the filtration of charged submicronic contaminants from aqueous liquids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/446,832 UST103601I4 (en) | 1981-12-28 | 1982-12-03 | Process for preparation of microporous membranes of controlled flow characteristics |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US33477181A | 1981-12-28 | 1981-12-28 | |
| US06/446,832 UST103601I4 (en) | 1981-12-28 | 1982-12-03 | Process for preparation of microporous membranes of controlled flow characteristics |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US33477181A Continuation | 1981-12-28 | 1981-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST103601I4 true UST103601I4 (en) | 1983-11-01 |
Family
ID=26989376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/446,832 Pending UST103601I4 (en) | 1981-12-28 | 1982-12-03 | Process for preparation of microporous membranes of controlled flow characteristics |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST103601I4 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4673504A (en) | 1980-10-27 | 1987-06-16 | Cuno Inc. | Charge modified microporous membrane |
| US4708803A (en) | 1980-10-27 | 1987-11-24 | Cuno Incorporated | Liquid filtration using hydrophilic cationic isotropic microporous nylon membrane |
| US4711793A (en) | 1980-10-27 | 1987-12-08 | Cuno Incorporated | Process for charge modifying a microphorous membrane |
| US20100155323A1 (en) * | 2008-12-23 | 2010-06-24 | Weiss Douglas E | Functionalized nonwoven article |
| US8329034B2 (en) | 2009-06-23 | 2012-12-11 | 3M Innovative Properties Company | Functionalized nonwoven article |
| US8377672B2 (en) | 2010-02-18 | 2013-02-19 | 3M Innovative Properties Company | Ligand functionalized polymers |
| US8435776B2 (en) | 2010-03-03 | 2013-05-07 | 3M Innovative Properties Company | Ligand functionalized polymers |
| US8586338B2 (en) | 2008-05-30 | 2013-11-19 | 3M Innovative Properties Company | Ligand functionalized substrates |
| US8652582B2 (en) | 2008-05-30 | 2014-02-18 | 3M Innovative Properties Company | Method of making ligand functionalized substrates |
-
1982
- 1982-12-03 US US06/446,832 patent/UST103601I4/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4708803A (en) | 1980-10-27 | 1987-11-24 | Cuno Incorporated | Liquid filtration using hydrophilic cationic isotropic microporous nylon membrane |
| US4711793A (en) | 1980-10-27 | 1987-12-08 | Cuno Incorporated | Process for charge modifying a microphorous membrane |
| US4673504A (en) | 1980-10-27 | 1987-06-16 | Cuno Inc. | Charge modified microporous membrane |
| US8846203B2 (en) | 2008-05-30 | 2014-09-30 | 3M Innovative Properties Company | Method of making ligand functionalized substrates |
| US10017461B2 (en) | 2008-05-30 | 2018-07-10 | 3M Innovative Properties Company | Method of making ligand functionalized substrates |
| US9650470B2 (en) | 2008-05-30 | 2017-05-16 | 3M Innovative Properties Company | Method of making ligand functionalized substrates |
| US8586338B2 (en) | 2008-05-30 | 2013-11-19 | 3M Innovative Properties Company | Ligand functionalized substrates |
| US8652582B2 (en) | 2008-05-30 | 2014-02-18 | 3M Innovative Properties Company | Method of making ligand functionalized substrates |
| US20100155323A1 (en) * | 2008-12-23 | 2010-06-24 | Weiss Douglas E | Functionalized nonwoven article |
| US8328023B2 (en) | 2008-12-23 | 2012-12-11 | 3M Innovative Properties Company | Functionalized nonwoven article |
| US8329034B2 (en) | 2009-06-23 | 2012-12-11 | 3M Innovative Properties Company | Functionalized nonwoven article |
| US9259689B2 (en) | 2009-06-23 | 2016-02-16 | 3M Innovative Properties Company | Functionalized nonwoven article |
| US8945896B2 (en) | 2010-02-18 | 2015-02-03 | 3M Innovative Properties Company | Ligand functionalized polymers |
| US9296847B2 (en) | 2010-02-18 | 2016-03-29 | 3M Innovative Properties Company | Ligand functionalized polymers |
| US8377672B2 (en) | 2010-02-18 | 2013-02-19 | 3M Innovative Properties Company | Ligand functionalized polymers |
| US8435776B2 (en) | 2010-03-03 | 2013-05-07 | 3M Innovative Properties Company | Ligand functionalized polymers |
| US9758547B2 (en) | 2010-03-03 | 2017-09-12 | 3M Innovative Properties Company | Ligand functionalized polymers |
| US10005814B2 (en) | 2010-03-03 | 2018-06-26 | 3M Innovative Properties Company | Ligand functionalized polymers |
| US10526366B2 (en) | 2010-03-03 | 2020-01-07 | 3M Innovative Properties Company | Ligand functionalized polymers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STCF | Information on status: patent grant |
Free format text: PATENTED CASE |