Polyolefin nonwovens with high wet strength retention bonded with vinyl chloride copolymers
AssigneeThe B. F. Goodrich Company
InventorGeorge J. Antlfinger
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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.
Claims5
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, .alpha.,.beta.-olefinically unsaturated carboxylic acids containing 3 to 5 carbon atoms;
- monounsaturated dicarboxylic acids containing 4 to 8 carbon atoms;
- esters of .alpha.,.beta.-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.
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;
- .alpha.,.beta.-olefinically unsaturated carboxylic acids containing 3 to 5 carbon atoms;
- monounsaturated dicarboxylic acids containing 4 to 8 carbon atoms;
- esters of .alpha.,.beta.-olefinically unsaturated monocarboxylic and dicarboxylic acids containing 4 to 20 carbon atoms;
- .alpha.,.beta.-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.
Dependencies are inferred from the claim text.