Invention Grant
US09266046B2 Mixed-fiber nonwoven fabric, laminated sheet and filter, and process for producing mixed-fiber nonwoven fabric
有权
混合纤维无纺布，层叠片材和过滤器，以及混纺纤维无纺布的制造方法
- Patent Title: Mixed-fiber nonwoven fabric, laminated sheet and filter, and process for producing mixed-fiber nonwoven fabric
- Patent Title (中): 混合纤维无纺布，层叠片材和过滤器，以及混纺纤维无纺布的制造方法
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Application No.: US14364109Application Date: 2012-12-14
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Publication No.: US09266046B2Publication Date: 2016-02-23
- Inventor: Akito Kuroda , Yuji Iyama , Yoshikazu Yakake
- Applicant: TORAY INDUSTRIES, INC.
- Applicant Address: JP Tokyo
- Assignee: Toray Industries, Inc.
- Current Assignee: Toray Industries, Inc.
- Current Assignee Address: JP Tokyo
- Agency: RatnerPrestia
- Priority: JP2011-275507 20111216
- International Application: PCT/JP2012/082445 WO 20121214
- International Announcement: WO2013/089213 WO 20130620
- Main IPC: B01D46/00
- IPC: B01D46/00 ; B01D39/16 ; B03C3/28 ; D04H3/016 ; D04H3/153 ; D04H3/16 ; D04H1/4382 ; D04H1/56 ; D04H13/00
Abstract:
Provided are a mixed-fiber nonwoven fabric suitable for air filters and a filter medium using the mixed-fiber nonwoven fabric. The nonwoven fabric includes at least two types of fibers having different melting points, which fibers are low melting point fibers made of a polyolefin resin component A, and high melting point fibers made of a high melting point resin component B having a higher melting point than that of the polyolefin resin component A. The number average fiber diameter of the high melting point fibers is larger than that of the low melting point fibers. At least one high melting point fiber having a fiber diameter of 20 μm to 100 μm is present per 1.00 mm of the length of the cross section of the nonwoven fabric. The number average fiber diameter of all fibers constituting the nonwoven fabric falls within the range of 0.3 μm to 10 μm.
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