US4374894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin nonwovens with high wet strength retention bonded with vinyl chloride copolymers
Assignee: Goodrich Corp
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Filing: 1980-11-03
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Granted: 1983-02-22
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Expires: 2000-11-03
Abstract
Abstract A polyolefin fabric, such as polyethylene or polypropylene, having improved wet tensile strength retention is made by bonding polyolefin fibers with a latex containing at least 5% polyvinyl chloride and/or polyvinylidene chloride.
Inventors
- 👤 George J. Antlfinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:58
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/587; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T442/00; Y10T442/20; Y10T442/2861; Y10T442/291; Y10T442/2918
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
A nonwoven fabric having improved wet tensile strength retention comprising polyolefin nonwoven fibers bonded together with a binder selected from the group consisting of latexes containing polyvinyl chloride wherein vinyl chloride is copolymerized with one or more of copolymerizable monomers selected from the group consisting of vinylidene chloride, α,β-olefinically unsaturated carboxylic acids containing 3 to 5 carbon atoms; monounsaturated dicarboxylic acids containing 4 to 8 carbon atoms; esters of α,β-olefinically unsaturated monocarboxylic and dicarboxylic acids containing 4 to 20 carbon atoms; acrylamides and methacrylamides and their N-alkylol derivatives containing 3 to 20 carbon atoms selected from the group consisting of hydroxyalkyl diacetone acrylamides and methacrylamides, hydroxyalkyl acrylamides and methacrylamides, N-alkylol acrylamides and methacrylamides, and mixtures thereof; vinyl ethers containing 4 to 22 carbon atoms; vinyl ketones containing 3 to 12 carbon atoms; vinyl esters of carboxylic acids containing 4 to 22 carbon atoms; alpha olefins containing 2 to 12 carbon atoms; styrene and styrene derivatives; and mixtures thereof.
Claim 2
Dependent Claim
158 words
A nonwoven fabric having improved wet tensile strength retention comprising polyolefin nonwoven fibers bonded together with a binder selected from the group consisting of latexes containing polyvinyl chloride wherein vinyl chloride is copolymerized with one or more of copolymerizable monomers selected from the group consisting of vinylidene chloride, α,β-olefinically unsaturated carboxylic acids containing 3 to 5 carbon atoms; monounsaturated dicarboxylic acids containing 4 to 8 carbon atoms; esters of α,β-olefinically unsaturated monocarboxylic and dicarboxylic acids containing 4 to 20 carbon atoms; acrylamides and methacrylamides and their N-alkylol derivatives containing 3 to 20 carbon atoms selected from the group consisting of hydroxyalkyl diacetone acrylamides and methacrylamides, hydroxyalkyl acrylamides and methacrylamides, N-alkylol acrylamides and methacrylamides, and mixtures thereof; vinyl ethers containing 4 to 22 carbon atoms; vinyl ketones containing 3 to 12 carbon atoms; vinyl esters of carboxylic acids containing 4 to 22 carbon atoms; alpha olefins containing 2 to 12 carbon atoms; styrene and styrene derivatives; and mixtures thereof.
Claim 3
Dependent Claim
50 words
A nonwoven fabric of claim 1 wherein said fibers are selected from the group consisting of polyethylene, polypropylene, and mixtures of such fibers; and amount of polymerized vinyl chloride in said latexes is at least about 5% by weight and up to an amount where it represents a major proportion.
Claim 4
Dependent Claim
33 words
A nonwoven fabric of claim 2 wherein said binder on said fabric is in a cured condition and amount of polymerized vinyl chloride in said latexes is a minimum of 20% by weight.
Claim 5
Independent Claim
174 words
A method for making nonwoven fabric with improved wet tensile strength retention comprising contacting polyolefin fibers with a binder to adhere said fibers together, said binder is selected from the group consisting of latexes containing polyvinyl chloride wherein vinyl chloride is copolymerized with one or more of copolymerizable monomers selected from the group consisting of vinylidene chloride; α,β-olefinically unsaturated carboxylic acids containing 3 to 5 carbon atoms; monounsaturated dicarboxylic acids containing 4 to 8 carbon atoms; esters of α,β-olefinically unsaturated monocarboxylic and dicarboxylic acids containing 4 to 20 carbon atoms; α,β-olefinically unsaturated nitriles containing 3 to 5 carbon atoms; acrylamides and methacrylamides derived from acrylic and methacrylic acids and their N-alkylol derivatives containing 3 to 20 carbon atoms selected from the group consisting of hydroxyalkyl diacetone acrylamides and methacrylamides, hydroxyalkyl acrylamides and methacrylamides, N-alkylol acrylamides and methacrylamides, and mixtures thereof; vinyl ethers containing 4 to 22 carbon atoms; vinyl esters of carboxylic acids containing 4 to 22 carbon atoms; alpha olefins containing 2 to 12 carbon atoms; styrene and styrene derivatives; and mixtures thereof.
Claim 6
Independent Claim
174 words
A method for making nonwoven fabric with improved wet tensile strength retention comprising contacting polyolefin fibers with a binder to adhere said fibers together, said binder is selected from the group consisting of latexes containing polyvinyl chloride wherein vinyl chloride is copolymerized with one or more of copolymerizable monomers selected from the group consisting of vinylidene chloride; α,β-olefinically unsaturated carboxylic acids containing 3 to 5 carbon atoms; monounsaturated dicarboxylic acids containing 4 to 8 carbon atoms; esters of α,β-olefinically unsaturated monocarboxylic and dicarboxylic acids containing 4 to 20 carbon atoms; α,β-olefinically unsaturated nitriles containing 3 to 5 carbon atoms; acrylamides and methacrylamides derived from acrylic and methacrylic acids and their N-alkylol derivatives containing 3 to 20 carbon atoms selected from the group consisting of hydroxyalkyl diacetone acrylamides and methacrylamides, hydroxyalkyl acrylamides and methacrylamides, N-alkylol acrylamides and methacrylamides, and mixtures thereof; vinyl ethers containing 4 to 22 carbon atoms; vinyl esters of carboxylic acids containing 4 to 22 carbon atoms; alpha olefins containing 2 to 12 carbon atoms; styrene and styrene derivatives; and mixtures thereof.
Claim 7
Dependent Claim
36 words
A method of claim 4 wherein said fibers are selected from the group consisting of polyethylene, polypropylene, and mixtures thereof; and amount of polymerized vinyl chloride in said latex is a minimum of 20% by weight.
References Cited (Backward Citations)
US3459631A
Cited
US3922424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |