Laminated battery separator material
AssigneeBBA Nonwoven Simpsonville, Inc.
InventorsLarry L. Kinn, Clement J. Haley, Gregory N. Henning
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Abstract
A nonwoven material having a laminated construction and including a first layer of nonwoven fibers defining a first surface of the material; a second layer of nonwoven fibers defining the opposite surface of the material; and a third layer of nonwoven fibers located between the first and second layers. The layers are bonded together to form a laminate. At least one of the nonwoven layers comprises a nonwoven web of meltblown fibers. Additionally, one or more of the layers has been rendered permanently hydrophilic by forming the nonwoven web from meltspun fibers of a normally hydrophobic polymer having a hydrophilic melt additive incorporated therein.
Claims25
A laminated nonwoven material comprising:
- a first layer of nonwoven fibers defining a first outer surface of the laminate;
- a second layer of nonwoven fibers defining the opposite outer surface of the laminate;
- and
- a third layer of nonwoven fibers located between said first and second layers, the layers being bonded together to form a laminate,
- at least one of said first, second and third layers comprising a nonwoven web of meltblown fibers, and
- at least one of said first, second and third layers comprising fibers of a normally hydrophobic polymer having a hydrophilic melt additive incorporated therein.
A laminated nonwoven material comprising:
- a first layer formed of meltblown nonwoven fibers defining a first surface of the laminate;
- a second layer formed of nonwoven fibers defining the opposite surface of the laminate;
- and
- an intermediate third layer of wetlaid nonwoven fibers located between said first and second layers and bonded to said first and second layers to form a laminate,
- at least one of said first and third layers comprising permanently hydrophilic fibers formed of a normally hydrophobic polypropylene polymer having a hydrophilic melt additive incorporated therein.
Dependencies are inferred from the claim text.