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US 10,207,212 B2Granted
Filter material
AssigneeAsahi Kasei Fibers Corporation
InventorsHideaki Fujii, Yoshiyuki Tadokoro, Satoru Tezuka, Kiyoshi Miyaji, Tatsuya Ogawa, Saori Tanaka
Life of this patent
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Abstract
Provided is a filter material which can enhance the particle holding capacity of a filter while keeping the particle capture efficiency thereof and which thus ensures a prolonged filter life. The present invention pertains to a filter material comprising a spun lace nonwoven fabric which contains a thermoplastic synthetic filament nonwoven fabric as the intermediate layer.
Claims9
A filter material for vehicle fuel, comprising a spun lace nonwoven fabric which contains a thermoplastics synthetic filament nonwoven fabric as an intermediate layer,
- wherein the thermoplastic synthetic filament nonwoven fabric as the intermediate layer is treated with a hydrophilic agent and is a spunbond nonwoven fabric having a fiber diameter of 5 to 30 μm and a basis weight of 20 to 160 g/m2, and a layer on one side of the spunbond nonwoven fabric is composed of staple fibers with a fiber diameter of 2 to 15 μm and a basis weight of 30 to 100 g/m2, while a layer on a second side is composed of staple fibers with a fiber diameter of 7 to 25 μm and a basis weight of 50 to 200 g/m2,
- wherein the fiber diameter of the staple fibers used in the layer on the one side is smaller than the fiber diameter of the staple fibers used in the layer on the second side, and
- wherein the spun lace nonwoven fabric is a nonwoven fabric having the staple fibers formed into a web and the fibers tangled with the spunbond nonwoven fabric, by a high-pressure water jet of a high-pressure columnar stream.
Dependencies are inferred from the claim text.