CA1131862A - Solvent stretch process for preparing microporous films from precursor films of controlled crystalline structure - Google Patents
Solvent stretch process for preparing microporous films from precursor films of controlled crystalline structureInfo
- Publication number
- CA1131862A CA1131862A CA352,780A CA352780A CA1131862A CA 1131862 A CA1131862 A CA 1131862A CA 352780 A CA352780 A CA 352780A CA 1131862 A CA1131862 A CA 1131862A
- Authority
- CA
- Canada
- Prior art keywords
- film
- polymer
- nucleating agent
- precursor film
- melt index
- 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.)
- Expired
Links
- 239000002243 precursor Substances 0.000 title claims abstract description 72
- 239000002904 solvent Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 229920000642 polymer Polymers 0.000 claims abstract description 98
- 238000000034 method Methods 0.000 claims abstract description 63
- 239000002667 nucleating agent Substances 0.000 claims abstract description 39
- 239000000155 melt Substances 0.000 claims abstract description 28
- 238000009826 distribution Methods 0.000 claims abstract description 27
- 229920001519 homopolymer Polymers 0.000 claims abstract description 21
- 230000000877 morphologic effect Effects 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 44
- -1 polytetra-fluoroethylene Polymers 0.000 claims description 36
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- 230000008961 swelling Effects 0.000 claims description 22
- 239000004698 Polyethylene Substances 0.000 claims description 21
- 229920000573 polyethylene Polymers 0.000 claims description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 230000006872 improvement Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 239000012704 polymeric precursor Substances 0.000 claims description 6
- 229940058401 polytetrafluoroethylene Drugs 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000003125 aqueous solvent Substances 0.000 claims description 2
- 229920006254 polymer film Polymers 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 4
- 150000001991 dicarboxylic acids Chemical class 0.000 claims 4
- 150000002763 monocarboxylic acids Chemical class 0.000 claims 4
- 239000005909 Kieselgur Substances 0.000 claims 2
- 239000004408 titanium dioxide Substances 0.000 claims 2
- 239000002952 polymeric resin Substances 0.000 abstract description 5
- 229920003002 synthetic resin Polymers 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 168
- 230000035699 permeability Effects 0.000 description 31
- 229920005989 resin Polymers 0.000 description 25
- 239000011347 resin Substances 0.000 description 25
- 206010042674 Swelling Diseases 0.000 description 18
- 238000001125 extrusion Methods 0.000 description 14
- 229920013716 polyethylene resin Polymers 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 241000446313 Lamella Species 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 7
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 229960002415 trichloroethylene Drugs 0.000 description 6
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 6
- 229920006372 Soltex Polymers 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- CBQYNPHHHJTCJS-UHFFFAOYSA-N Alline Chemical compound C1=CC=C2C3(O)CCN(C)C3NC2=C1 CBQYNPHHHJTCJS-UHFFFAOYSA-N 0.000 description 4
- 230000006911 nucleation Effects 0.000 description 4
- 238000010899 nucleation Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 238000002459 porosimetry Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1 -dodecene Natural products CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- SUWJESCICIOQHO-UHFFFAOYSA-N 4-methylhex-1-ene Chemical compound CCC(C)CC=C SUWJESCICIOQHO-UHFFFAOYSA-N 0.000 description 1
- WNEYWVBECXCQRT-UHFFFAOYSA-N 5-methylhept-1-ene Chemical compound CCC(C)CCC=C WNEYWVBECXCQRT-UHFFFAOYSA-N 0.000 description 1
- JIUFYGIESXPUPL-UHFFFAOYSA-N 5-methylhex-1-ene Chemical compound CC(C)CCC=C JIUFYGIESXPUPL-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- PXXNTAGJWPJAGM-VCOUNFBDSA-N Decaline Chemical compound C=1([C@@H]2C3)C=C(OC)C(OC)=CC=1OC(C=C1)=CC=C1CCC(=O)O[C@H]3C[C@H]1N2CCCC1 PXXNTAGJWPJAGM-VCOUNFBDSA-N 0.000 description 1
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 1
- MWRWFPQBGSZWNV-UHFFFAOYSA-N Dinitrosopentamethylenetetramine Chemical compound C1N2CN(N=O)CN1CN(N=O)C2 MWRWFPQBGSZWNV-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 102100021337 Gap junction alpha-1 protein Human genes 0.000 description 1
- 101000894966 Homo sapiens Gap junction alpha-1 protein Proteins 0.000 description 1
- 241000845077 Iare Species 0.000 description 1
- 241000489861 Maximus Species 0.000 description 1
- 101100166829 Mus musculus Cenpk gene Proteins 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 241001282736 Oriens Species 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 150000001241 acetals Chemical class 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- FRCHCYFLGZRELU-UHFFFAOYSA-N butan-2-one;cyclohexanone Chemical compound CCC(C)=O.O=C1CCCCC1 FRCHCYFLGZRELU-UHFFFAOYSA-N 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- GPUADMRJQVPIAS-QCVDVZFFSA-M cerivastatin sodium Chemical compound [Na+].COCC1=C(C(C)C)N=C(C(C)C)C(\C=C\[C@@H](O)C[C@@H](O)CC([O-])=O)=C1C1=CC=C(F)C=C1 GPUADMRJQVPIAS-QCVDVZFFSA-M 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229940069096 dodecene Drugs 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229940052308 general anesthetics halogenated hydrocarbons Drugs 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- JCYWCSGERIELPG-UHFFFAOYSA-N imes Chemical class CC1=CC(C)=CC(C)=C1N1C=CN(C=2C(=CC(C)=CC=2C)C)[C]1 JCYWCSGERIELPG-UHFFFAOYSA-N 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 230000005865 ionizing radiation Effects 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 125000005704 oxymethylene group Chemical group [H]C([H])([*:2])O[*:1] 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920000412 polyarylene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005638 polyethylene monopolymer Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- BALXUFOVQVENIU-KXNXZCPBSA-N pseudoephedrine hydrochloride Chemical compound [H+].[Cl-].CN[C@@H](C)[C@@H](O)C1=CC=CC=C1 BALXUFOVQVENIU-KXNXZCPBSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- CMXPERZAMAQXSF-UHFFFAOYSA-M sodium;1,4-bis(2-ethylhexoxy)-1,4-dioxobutane-2-sulfonate;1,8-dihydroxyanthracene-9,10-dione Chemical compound [Na+].O=C1C2=CC=CC(O)=C2C(=O)C2=C1C=CC=C2O.CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC CMXPERZAMAQXSF-UHFFFAOYSA-M 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229940095068 tetradecene Drugs 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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
- B01D67/0002—Organic membrane manufacture
- B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
- B01D67/0025—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching
- B01D67/0027—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching by stretching
-
- 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
- B01D71/26—Polyalkenes
- B01D71/261—Polyethylene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
-
- 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
- Y10S264/47—Processes of splitting film, webs or sheets
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US044,805 | 1979-06-01 | ||
| US06/044,805 US4255376A (en) | 1979-06-01 | 1979-06-01 | Solvent stretch process for preparing microporous films from precursor films of controlled crystalline structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1131862A true CA1131862A (en) | 1982-09-21 |
Family
ID=21934431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA352,780A Expired CA1131862A (en) | 1979-06-01 | 1980-05-27 | Solvent stretch process for preparing microporous films from precursor films of controlled crystalline structure |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4255376A (cg-RX-API-DMAC7.html) |
| JP (1) | JPS5620035A (cg-RX-API-DMAC7.html) |
| CA (1) | CA1131862A (cg-RX-API-DMAC7.html) |
| DE (1) | DE3020372C2 (cg-RX-API-DMAC7.html) |
| FR (1) | FR2457761A1 (cg-RX-API-DMAC7.html) |
| GB (1) | GB2051665B (cg-RX-API-DMAC7.html) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2150881A (en) * | 1983-11-23 | 1985-07-10 | Bcl Ltd | Decorative packaging films |
| US5110326A (en) * | 1985-07-31 | 1992-05-05 | Celanese Corporation | Immobilized liquid membrane |
| ZA865173B (en) * | 1985-07-31 | 1987-03-25 | Celanese Corp | Immobilized liquid membrane |
| NZ218971A (en) * | 1986-01-21 | 1989-05-29 | Mitsui Toatsu Chemicals | Porous polyolefin films and their preparation |
| US4726989A (en) * | 1986-12-11 | 1988-02-23 | Minnesota Mining And Manufacturing | Microporous materials incorporating a nucleating agent and methods for making same |
| US4861644A (en) * | 1987-04-24 | 1989-08-29 | Ppg Industries, Inc. | Printed microporous material |
| US4833172A (en) * | 1987-04-24 | 1989-05-23 | Ppg Industries, Inc. | Stretched microporous material |
| US4968464A (en) * | 1987-04-30 | 1990-11-06 | Kohjin Co., Ltd. | Process for producing a porous resin film |
| US5013439A (en) * | 1988-05-12 | 1991-05-07 | Hoechst Celanese Corporation | Microporous membranes having increased pore densities and process for making the same |
| US5248461A (en) * | 1989-01-13 | 1993-09-28 | Stamicarbon B.V. | Process of making microporous films of UHMWPE |
| NL8900078A (nl) * | 1989-01-13 | 1990-08-01 | Stamicarbon | Microporeuze folien van ultrahoogmoleculair polyetheen. |
| US5080954A (en) * | 1989-06-06 | 1992-01-14 | Armstrong World Industries, Inc. | Surface covering with inverse spherulite patterns |
| ATE170091T1 (de) * | 1992-03-20 | 1998-09-15 | Monsanto Co | Extraktion organischer verbindungen aus wässrigen lösungen |
| US5507949A (en) * | 1992-03-20 | 1996-04-16 | Monsanto Company | Supported liquid membrane and separation process employing same |
| US5366833A (en) * | 1993-03-22 | 1994-11-22 | Shaw Joel F | Security documents |
| US6179939B1 (en) | 1997-05-12 | 2001-01-30 | Kimberly-Clark Worldwide, Inc. | Methods of making stretched filled microporous films |
| US6162360A (en) * | 1997-12-29 | 2000-12-19 | Monsanto Company | Membrane process for making enhanced flavor fluids |
| US6579343B2 (en) * | 2001-03-30 | 2003-06-17 | University Of Notre Dame Du Lac | Purification of gas with liquid ionic compounds |
| US20040135278A1 (en) * | 2001-05-16 | 2004-07-15 | Kazuo Akaishi | Method for producing polyolefin porous film |
| US6812314B2 (en) * | 2001-10-17 | 2004-11-02 | University Of Florida | Thermally responsive polymer materials and uses thereof |
| US7105089B2 (en) * | 2003-03-13 | 2006-09-12 | 3M Innovative Properties Company | Liquid—liquid extraction system and method |
| US7122709B2 (en) * | 2003-03-13 | 2006-10-17 | 3M Innovative Properties Company | Method for obtaining ethanol |
| US7338692B2 (en) | 2003-09-12 | 2008-03-04 | 3M Innovative Properties Company | Microporous PVDF films |
| US7794593B2 (en) * | 2005-11-30 | 2010-09-14 | 3M Innovative Properties Company | Cross-flow membrane module |
| US9951008B2 (en) | 2009-11-03 | 2018-04-24 | University Of Notre Dame Du Lac | Ionic liquids comprising heteraromatic anions |
| WO2013090061A1 (en) | 2011-12-14 | 2013-06-20 | 3M Innovative Properties Company | Methods of producing butanol from non-cellulosic biomass |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3903324A (en) * | 1969-12-30 | 1975-09-02 | Ibm | Method of changing the physical properties of a metallic film by ion beam formation |
| US3839240A (en) * | 1971-03-18 | 1974-10-01 | Celanese Corp | High melt index microporous films |
| US3839516A (en) * | 1971-06-25 | 1974-10-01 | Res Triangle Inst | Process for the preparation of opencelled microporous films |
| US3738904A (en) * | 1971-06-28 | 1973-06-12 | Du Pont | Filled biaxially oriented polymeric film |
| US3862030A (en) * | 1972-12-13 | 1975-01-21 | Amerace Esna Corp | Microporous sub-micron filter media |
| FR2246587B1 (cg-RX-API-DMAC7.html) * | 1973-10-03 | 1978-08-11 | Nat Res Dev |
-
1979
- 1979-06-01 US US06/044,805 patent/US4255376A/en not_active Expired - Lifetime
-
1980
- 1980-05-27 CA CA352,780A patent/CA1131862A/en not_active Expired
- 1980-05-29 DE DE3020372A patent/DE3020372C2/de not_active Expired - Lifetime
- 1980-05-30 FR FR8012140A patent/FR2457761A1/fr active Granted
- 1980-05-30 JP JP7157180A patent/JPS5620035A/ja active Granted
- 1980-05-30 GB GB8017737A patent/GB2051665B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2051665B (en) | 1983-03-09 |
| DE3020372C2 (de) | 1994-03-10 |
| DE3020372A1 (de) | 1980-12-11 |
| FR2457761A1 (fr) | 1980-12-26 |
| JPS5620035A (en) | 1981-02-25 |
| GB2051665A (en) | 1981-01-21 |
| JPH021174B2 (cg-RX-API-DMAC7.html) | 1990-01-10 |
| US4255376A (en) | 1981-03-10 |
| FR2457761B1 (cg-RX-API-DMAC7.html) | 1983-01-21 |
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