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Patent Searching and Data


Title:
PRODUCTION METHOD FOR FILTER MEDIUM, FILTER MEDIUM, AND RESPIRATOR
Document Type and Number:
WIPO Patent Application WO/2019/155558
Kind Code:
A1
Abstract:
A production method for a filter medium that has a total thickness of 0.05–0.4 mm, the production medium including, in order: a nanofiber layering step in which nanofibers that have an average fiber diameter of 100–400 nm are layered to a basis weight of 0.05–0.2 g/m2 on one surface of a first nonwoven fabric 12 that is a spunbond nonwoven fabric that has a basis weight of 10–50 g/m2 to form a second nonwoven fabric 14; and an adhesion step in which a third nonwoven fabric 16 that is an electret meltblown nonwoven fabric that has a basis weight of 5–30 g/m2 is adhered. A filter medium 10 and a respirator 100 that uses the filter medium 10. This production method for a filter medium makes it possible to achieve weight and thickness reduction but maintain high collection performance and, compared to conventional filter medium production methods, makes it possible to produce a filter medium 10 that is less prone to damage and deterioration.

Inventors:
WATANABE, Kei (SHINSHU UNIVERSITY Faculty of Textile Science and Technology, 3-15-1, Tokida, Ueda-sh, Nagano 67, 〒3868567, JP)
OHSAWA, Osamu (SHINSHU UNIVERSITY Faculty of Textile Science and Technology, 3-15-1, Tokida, Ueda-sh, Nagano 67, 〒3868567, JP)
Application Number:
JP2018/004243
Publication Date:
August 15, 2019
Filing Date:
February 07, 2018
Export Citation:
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Assignee:
NAFIAS INC. (Faculty of Textile Science and Technology 3-15-1, Tokida,Ueda-sh, Nagano 67, 〒3868567, JP)
International Classes:
B01D39/16; A41D13/11
Foreign References:
JP2017031530A2017-02-09
JP2013022569A2013-02-04
JP2012223674A2012-11-15
JP2014226184A2014-12-08
JP2009544468A2009-12-17
JP2017031515A2017-02-09
JP6172924B22017-08-02
Attorney, Agent or Firm:
MEBUKI IP LAW FIRM et al. (1037-5, Kobuchisawa-cho Hokuto-sh, Yamanashi 44, 〒4080044, JP)
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