Nonwoven fabric for filters
AssigneeToray Industries, Inc.
InventorsNobuyuki Takano, Masashi Ito, Makoto Nishimura
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Abstract
This invention relates to a nonwoven fabric for filters, in which a melt blown nonwoven fabric formed of polybutylene terephthalate or polypropylene terephthalate fibers with an average fiber diameter of 1 to 8 μm and a spunbonded nonwoven fabric formed of polyester-based fibers with an average fiber diameter of 10 to 30 μcm are laminated for integration.
Claims7
A nonwoven fabric for filters in which a melt blown nonwoven fabric formed of fibers with an average fiber diameter of 1-8 μm and a spunbonded nonwoven fabric formed of core-sheath fibers with an average fiber diameter of 10 to 30 μm are laminated for integration, wherein the fibers of the melt blown nonwoven fabric and a sheath component of the core-sheath fibers of the spunbonded nonwoven fabric contain polybutylene terephthalate while a core component of the core-sheath fibers of the spunbonded nonwoven fabric contains polyethylene terephthalate, wherein the polymer composition of the sheath component of the core-sheath fibers of the spunbonded nonwoven fabric is the same as the polymer composition of the fibers of the melt blown nonwoven fabric.
Dependencies are inferred from the claim text.