UST901007I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST901007I4 UST901007I4 US901007DH UST901007I4 US T901007 I4 UST901007 I4 US T901007I4 US 901007D H US901007D H US 901007DH US T901007 I4 UST901007 I4 US T901007I4
- Authority
- US
- United States
- Prior art keywords
- solution
- solvent
- substrate
- polymer
- coated
- 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
Definitions
- a process for making vapor-permeable, microporous sheet materials by (a) preparing a solution of polymeric material in an organic solvent, (b) applying the polymeric solution to a fibrous substrate to produce a substrate coated with a layer of polymer solution, (c) bathing the coated substrate with a mixture of solvent and non-solvent that is at least partially miscible with said solvent for the polymer in the solution in (a) to produce a microporous polymer layer on the substrate, and (d) removing substantially all of the solvent and non-solvent from the microporous polymer layer, wherein a wetting liquid is applied to the substrate side of the coated substrate during the bathing step (c).
- the substrate is typically a non-woven fabric containing a solidified polymeric impregnant having a porous moisture-permeable structure.
- the wetting solution is water or an aqueous solution with a water miscible organic solvent preferably with a wetting agent selected from the group consisting of alkyl phenoxy-polyethoxy alcohols, sodium N-methyl- N-oleoyl taurate, polyethylene oxy-derivatives and polyoxyethylated alcohols.
- the polymer solution is preferably a dispersion of a mixture of polyurethane and polyvinyl chloride.
Abstract
A PROCESS FOR MAKING VAPOR-PERMEABLE, MICROPOROUS SHEET MATERIALS BY (A) PREPARING A SOLUTION OF POLYMERIC MATERIAL IN AN ORGANIC SOLVENT, (B) APPLYING THE POLYMERIC SOLUTION TO A FIBROUS SUBSTRATE TO PRODUCE A SUBSTRATE COATED WITH A LAYER OF POLYMER SOLUTION, (C) BATHING THE COATED SUBSTRATE WITH A MIXTURE OF SOLVENT AND NON-SOLVENT THAT IS AT LEAST PARTIALLY MISCIBLE WITH SAID SOLVENT FOR THE POLYMER IN THE SOLUTION IN (A) TO PRODUCE A MICROPOROUS POLYMER LAYER ON THE SUBSTRATE, AND (D) REMOVING SUBSTANTIALLY ALL OF THE SOLVENT AND NON-SOLVENT FROM THE MCROPOROUS POLYMER LAYER, WHEREIN A WETTING LIQUID IS APPLIED TO THE SUBSTRATE SIDE OF THE COATED SUBSTRATE DURING THE BATHING STEP (C). THE SUBSTRATE IS TYPICALLY A NON-WOVEN FABRIC CONTAINING A SOLIDIFIED POLYMERIC IMPREGNANT HAVING A POROUS MOISTURE-PERMEABLE STRUCTURE. THE WETTING SOLUTION IS WATER OR AN AQUEOUS SOLUTION WITH A WATER MISCIBLE ORGANIC SOLVENT PREFERABLY WITH A WETTING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKYL PHENOXY-POLYETHOXY ALCOHOLS, SODIUM N-METHYLN-OLEOYL TAURATE, POLYETHYLENE OXY-DERIVATIVES AND POLYOXYETHYLATED ALCOHOLS. THE POLYMER SOLUTION IS PREFERABLY A DISPERSION OF A MIXTURE OF POLYURETHANE AND POLYVINYL CHLORIDE.
Description
Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public-for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Otlice makes no assertion as to the novelty of the disclosed subject matter;
PUBLISHED AUG. 1, 1972 01,007 PROCESS FOR MAKING SMOOTH VAPOR- PERMEABLE MICROPOROUS SHEET MATERIALS Tirunillayi S. Govindan, Madison, Tenn, assignor to E. l. du Pont de Nemours and Company, Wilmington, Del. Continuation of abandoned application Ser. No. 805,880, Mar. 10, 1969. This application May 27, 1971, Ser.
lint. Cl. B44d 1/44 US. Cl. 117-63 No Drawing. 13 Pages Specification A process for making vapor-permeable, microporous sheet materials by (a) preparing a solution of polymeric material in an organic solvent, (b) applying the polymeric solution to a fibrous substrate to produce a substrate coated with a layer of polymer solution, (c) bathing the coated substrate with a mixture of solvent and non-solvent that is at least partially miscible with said solvent for the polymer in the solution in (a) to produce a microporous polymer layer on the substrate, and (d) removing substantially all of the solvent and non-solvent from the microporous polymer layer, wherein a wetting liquid is applied to the substrate side of the coated substrate during the bathing step (c). The substrate is typically a non-woven fabric containing a solidified polymeric impregnant having a porous moisture-permeable structure. The wetting solution is water or an aqueous solution with a water miscible organic solvent preferably with a wetting agent selected from the group consisting of alkyl phenoxy-polyethoxy alcohols, sodium N-methyl- N-oleoyl taurate, polyethylene oxy-derivatives and polyoxyethylated alcohols. The polymer solution is preferably a dispersion of a mixture of polyurethane and polyvinyl chloride.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14762871A | 1971-05-27 | 1971-05-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
UST901007I4 true UST901007I4 (en) | 1972-08-01 |
Family
ID=22522283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US901007D Pending UST901007I4 (en) | 1971-05-27 | 1971-05-27 | Defensive publication |
Country Status (1)
Country | Link |
---|---|
US (1) | UST901007I4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6261674B1 (en) | 1998-12-28 | 2001-07-17 | Kimberly-Clark Worldwide, Inc. | Breathable microlayer polymer film and articles including same |
-
1971
- 1971-05-27 US US901007D patent/UST901007I4/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6261674B1 (en) | 1998-12-28 | 2001-07-17 | Kimberly-Clark Worldwide, Inc. | Breathable microlayer polymer film and articles including same |
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