Title:
PRODUCTION METHOD FOR FILTER MEDIUM, FILTER MEDIUM, AND RESPIRATOR
Document Type and Number:
WIPO Patent Application WO/2019/156157
Kind Code:
A1
Abstract:
A production method for a filter medium that has a total thickness of 0.05–0.4 mm, the production method 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 a meltblown nonwoven fabric that has a basis weight of 5–30 g/m2 is adhered. A filter medium 10 that is produced by means of the production method for a filter medium; 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 (JP)
OHSAWA OSAMU (JP)
OHSAWA OSAMU (JP)
Application Number:
PCT/JP2019/004393
Publication Date:
August 15, 2019
Filing Date:
February 07, 2019
Export Citation:
Assignee:
NAFIAS INC (JP)
International Classes:
B01D39/16; A41D13/11; F01N3/022; F02M37/34
Foreign References:
| JP2017031530A | 2017-02-09 | |||
| JP2017101342A | 2017-06-08 | |||
| JP2014223227A | 2014-12-04 | |||
| JP2014226184A | 2014-12-08 | |||
| JP3101212U | 2004-06-10 | |||
| JP2009544468A | 2009-12-17 | |||
| JP2017031515A | 2017-02-09 | |||
| JP6172924B2 | 2017-08-02 |
Attorney, Agent or Firm:
MEBUKI IP LAW FIRM et al. (JP)
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