Title:
スパンボンド不織布およびその製造方法
Document Type and Number:
Japanese Patent JP6915547
Kind Code:
B2
Abstract:
The present invention provides a spunbonded nonwoven fabric, which has a superior membrane formability of not allowing, at the time of casting of a resin solution, a bleed-through of the resin solution due to excessive permeation, a peel-off of a membrane substance, or any other defect such as nonuniform membrane or pin hole due to fluffing of the support, and further exhibits membrane bondability that is strong enough to prevent the membrane substance from peeling off after membrane formation, and a production method for the spunbonded nonwoven fabric. The spunbonded nonwoven fabric of the present invention is a spunbonded nonwoven fabric composed of thermoplastic fibers. In this spunbonded nonwoven fabric, the thermoplastic fiber is a conjugate fiber in which a low-melting polymer having a melting point lower by 10 to 140°C than that of a high-melting polymer is provided around the high-melting polymer, the spunbonded nonwoven fabric has a non-pressure bonding portion having an apparent density of 0.20 to 0.60 g/cm, when a length of a long axis of a fiber cross section of the non-pressure bonding portion is a and a length of a short axis thereof is b, a fiber flatness a/b is 1.5 to 5, and an air permeability satisfies the following [formula 1].
Inventors:
Daiki Shimada
Yuki Ikejiri
Youhei Nakano
Yuki Ikejiri
Youhei Nakano
Application Number:
JP2017558753A
Publication Date:
August 04, 2021
Filing Date:
August 25, 2017
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
D04H3/147; B01D69/10; D04H3/011
Domestic Patent References:
| JP2011005455A | ||||
| JP2013071106A |
Foreign References:
| WO2009017086A1 | ||||
| WO2015046215A1 | ||||
| WO2013125583A1 | ||||
| US5498468 |