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Title:
AIR-FILTER MEDIUM
Document Type and Number:
WIPO Patent Application WO/2017/208952
Kind Code:
A1
Abstract:
A sheet-shaped air-filter medium obtained by laminating first needle-punched nonwoven fabric, which comprises core-sheath type heat-fusible short composite polyester fibers and non-core-sheath type short polyester fibers, second needle-punched nonwoven fabric, which comprises core-sheath type heat-fusible short composite polyester fibers and non-core-sheath type short polyester fibers, and spun lace nonwoven fabric comprising core-sheath type heat-fusible short composite polyester fibers and non-core-sheath type short polyester fibers, the air-filter medium having undergone thermal fusion bonding and having a sheet thickness, as measured in accordance with JIS-P-8118, of 1.6-2.3 mm, a stiffness, as measured in accordance with JIS-L-1096 8.22. method 1A (Gurley method), of 70-110 mN, and a basis weight of 240-340 g/m2. The first needle-punched nonwoven fabric, the second needle-punched nonwoven fabric, and the spun lace nonwoven fabric have respective specific basis weights. In the core-sheath type heat-fusible short composite polyester fibers of each of the first and second needle-punched nonwoven fabric and the spun lace nonwoven fabric, the polyesters corresponding to the sheaths have melting points of 100-160°C, and the polyesters corresponding to the cores have melting points of 250-260°C. The non-core-sheath type short polyester fibers of each of the first and second needle-punched nonwoven fabric and the spun lace nonwoven fabric have melting points of 250-260°C.

Inventors:
TAKAHASHI Toshikazu (Saitama Plant 500, Uchigashima, Fukaya-sh, Saitama 31, 〒3660831, JP)
UMEZU Norio (Saitama Plant 500, Uchigashima, Fukaya-sh, Saitama 31, 〒3660831, JP)
MIZUI Kazumasa (Saitama Plant 500, Uchigashima, Fukaya-sh, Saitama 31, 〒3660831, JP)
Application Number:
JP2017/019470
Publication Date:
December 07, 2017
Filing Date:
May 25, 2017
Export Citation:
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Assignee:
DYNIC CORPORATION (26 Daimon-cho, Nishikyogoku Ukyo-ku, Kyoto-sh, Kyoto 12, 〒6150812, JP)
International Classes:
B01D39/16; B32B5/02; B32B5/26; D04H1/46; D04H1/492; D04H1/55; F02M35/024
Attorney, Agent or Firm:
TAJIME & TAJIME (Room No. 201, New-Well-Ikuta Bldg. 26-28, Mita 1-chome, Tama-ku, Kawasaki-sh, Kanagawa 34, 〒2140034, JP)
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