Acrylate copolymeric fibers
Assignee3M Innovative Properties Company
InventorsEugene G. Joseph, Ashish Khandpur, Kenneth C. Williams, Anthony R. Clanton, Steven C. Stickels, Randy A. Hoff
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Abstract
The present invention provides fibers and products produced therefrom, including nonwoven webs and adhesive articles. The fibers, which can be multilayer fibers, include a pressure-sensitive adhesive composition comprising an acrylate copolymer comprising copolymerized monomers comprising at least one monofunctional alkyl (meth)acrylate monomer and at least one monofunctional free-radically copolymerizable reinforcing monomer having a homopolymer glass transition temperature higher than that of the alkyl (meth)acrylate monomer.
Claims53
A pressure-sensitive adhesive fiber comprising a pressure-sensitive adhesive composition comprising a crosslinked melt-processable acrylate copolymer as a structural component of the fiber, wherein the crosslinked melt-processable acrylate copolymer comprises copolymerized monomers comprising at least one monofunctional alkyl (meth)acrylate monomer, at least one monofunctional free-radically copolymerizable reinforcing monomer having a homopolymer glass transition temperature higher than that of the alkyl (meth)acrylate monomer, and a crosslinking agent;
- wherein the crosslinking agent crosslinks subsequent to fiber formation.
A pressure-sensitive adhesive fiber which is in the form of a multilayer fiber comprising at least a first layer comprising a pressure-sensitive adhesive composition comprising an acrylate copolymer as a structural component of the fiber, wherein the acrylate copolymer comprises copolymerized monomers comprising at least one monofunctional alkyl (meth)acrylate monomer and at least one monofunctional free-radically copolymerizable reinforcing monomer having a homopolymer glass transition temperature higher than that of the alkyl (meth)acrylate monomer.
A nonwoven web comprising pressure-sensitive adhesive fibers;
- wherein the fibers comprise a pressure-sensitive adhesive composition comprising a crosslinked melt-processable acrylate copolymer as a structural component of the fibers;
- wherein the crosslinked melt-processable acrylate copolymer comprises copolymerized monomers comprising at least one monofunctional alkyl (meth)acrylate monomer, at least one monofunctional free-radically copolymerizable reinforcing monomer having a homopolymer glass transition temperature higher than that of the alkyl (meth)acrylate monomer, and a crosslinking agent;
- wherein the crosslinking agent crosslinks subsequent to fiber formation.
An adhesive article comprising a backing and a layer of a nonwoven web laminated to at least one major surface of the backing;
- wherein the nonwoven web comprises pressure-sensitive adhesive fibers;
- wherein the fibers comprise a pressure-sensitive adhesive composition comprising a crosslinked melt-processable acrylate copolymer as a structural component of the fibers;
- wherein the crosslinked melt-processable acrylate copolymer comprises copolymerized monomers comprising at least one monofunctional alkyl (meth)acrylate monomer, at least one monofunctional free-radically copolymerizable reinforcing monomer having a homopolymer glass transition temperature higher than that of the alkyl (meth)acrylate monomer, and a crosslinking agent;
- wherein the crosslinking agent crosslinks subsequent to fiber formation.
An adhesive article comprising a backing and a layer of nonwoven web laminated to at least one major surface of the backing;
- wherein the nonwoven web comprises pressure-sensitive adhesive fibers;
- wherein each fiber is in the form of a multilayer fiber comprising at least a first layer comprising a pressure-sensitive adhesive composition comprising an acrylate copolymer as a structural component of the fibers;
- wherein the acrylate copolymer comprises copolymerized monomers comprising at least one monofunctional alkyl (meth)acrylate monomer and at least one monofunctional free-radically copolymerizable reinforcing monomer having a homopolymer glass transition temperature higher than that of the alkyl (meth)acrylate monomer.
A pressure-sensitive adhesive fiber comprising a pressure-sensitive adhesive composition comprising a crosslinked acrylate copolymer as a structural component of the fiber;
- wherein the crosslinked acrylate copolymer comprises copolymerized monomers comprising at least one monofunctional alkyl (meth)acrylate monomer, at least one monofunctional free-radically copolymerizable reinforcing monomer having a homopolymer glass transition temperature higher than that of the alkyl (meth)acrylate monomer, and a crosslinking agent;
- wherein the crosslinking agent crosslinks subsequent to fiber formation;
- and further wherein the pressure-sensitive adhesive composition includes at least one secondary melt processable polymer or copolymer selected from the group of a polyolefin, a polystyrene, a polyurethane, a polyester, a polyamide, a styrenic block copolymer, an epoxy, a vinyl acetate, and mixtures thereof.
A nonwoven web comprising pressure-sensitive adhesive fibers;
- wherein the fibers comprise a pressure-sensitive adhesive composition comprising a crosslinked acrylate copolymer as a structural component of the fibers;
- wherein the crosslinked acrylate copolymer comprises copolymerized monomers comprising at least one monofunctional alkyl (meth)acrylate monomer, at least one monofunctional free-radically copolymerizable reinforcing monomer having a homopolymer glass transition temperature higher than that of the alkyl (meth)acrylate monomer, and a crosslinking agent;
- wherein the crosslinking agent crosslinks subsequent to fiber formation;
- and further wherein the pressure-sensitive adhesive composition further includes at least one secondary melt processable polymer or copolymer selected from the group of a polyolefin, a polystyrene, a polyurethane, a polyester, a polyamide, a styrenic block copolymer, an epoxy, a vinyl acetate, and mixtures thereof.
Dependencies are inferred from the claim text.