US4268546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making non-woven fabrics from synthetic fibers
Assignee: Dow Chemical Co
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Filing: 1980-06-25
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Granted: 1981-05-19
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Expires: 2000-06-25
Abstract
Abstract Non-woven fabrics are prepared from synthetic fibers by impregnating the fibers with a liquid binder system containing a polymer of from 35 to 60 weight percent of a hard monomer, 0 to 45 weight percent of butadiene or isoprene, 10 to 50 weight percent of an acrylate having from 1 to 8 carbon atoms in the ester portion and 1 to 5 weight percent of an ethylenically unsaturated mono- or dicarboxylic acid.
Inventors
- 👤 James E. Schwartz
- 👤 Kent B. McReynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:22
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/587; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2861; Y10T442/2885
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
A method for making non-woven fabrics having a soft, cloth-like feel from synthetic fibers in which a polymer in the form of an aqueous dispersion is incorporated into a web of synthetic fibers, water is removed and the retained polymeric binder is cured which comprises impregnating the synthetic fibers with an aqueous binder system containing a polymer, the solids of which consist essentially of from 35 to 60 weight percent of a hard monomer, 0 to 45 weight percent of butadiene or isoprene, 10 to 50 weight percent of an acrylate ester having from 1 to 8 carbon atoms in the ester portion and 1 to 5 weight percent of an ethylenically unsaturated mono- or dicarboxylic acid.
Claim 2
Independent Claim
117 words
A method for making non-woven fabrics having a soft, cloth-like feel from synthetic fibers in which a polymer in the form of an aqueous dispersion is incorporated into a web of synthetic fibers, water is removed and the retained polymeric binder is cured which comprises impregnating the synthetic fibers with an aqueous binder system containing a polymer, the solids of which consist essentially of from 35 to 60 weight percent of a hard monomer, 0 to 45 weight percent of butadiene or isoprene, 10 to 50 weight percent of an acrylate ester having from 1 to 8 carbon atoms in the ester portion and 1 to 5 weight percent of an ethylenically unsaturated mono- or dicarboxylic acid.
Claim 3
Dependent Claim
10 words
Method of claim 1 wherein the hard monomer is styrene.
Claim 4
Dependent Claim
40 words
Method of claim 2 wherein the binder comprises from about 40 to 45 weight percent styrene, about 20 to 40 weight percent butadiene, about 15 to 35 weight percent butyl acrylate and about 2 to 4 weight percent itaconic acid.
Claim 5
Dependent Claim
11 words
Method of claim 3 wherein the synthetic fiber is a polyester.
Claim 6
Dependent Claim
10 words
Method of claim 3 wherein the synthetic fiber is polypropylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |