Title:
NONWOVEN FABRIC AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/176786
Kind Code:
A1
Abstract:
The present invention provides a nonwoven fabric that is biodegradable and has a good pleat retaining property, and an application thereof. The present invention relates to a nonwoven fabric comprising at least one fiber layer (I) which contains a polylactic acid polymer and which has an average fiber diameter of 10-30 μm, wherein in polarized Raman spectroscopy of the fiber layer (I), the value I// / I⊥, which is the ratio of the peak intensity I// at 872 cm-1 of a Raman spectrum measured with polarized light parallel to a fiber axis, to the peak intensity I at 872 cm-1 of a Raman spectrum measured with polarized light perpendicular to the fiber axis, is not more than 1.80. The present invention also relates to a filter material comprising the nonwoven fabric, and a filter for foods, an air filter, and a mask which each comprise the filter material.
Inventors:
NAKANISHI YASUO (JP)
FUJIMOTO YUYA (JP)
FUKUNAGA AKIHISA (JP)
SHIOTA EIJI (JP)
FUJIMOTO YUYA (JP)
FUKUNAGA AKIHISA (JP)
SHIOTA EIJI (JP)
Application Number:
PCT/JP2023/009670
Publication Date:
September 21, 2023
Filing Date:
March 13, 2023
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
D04H3/16; A41D13/11; B01D39/16; B32B5/26; B32B27/02; D01D5/08; D01F6/62; D04H3/011; D04H3/14
Domestic Patent References:
| WO2023032763A1 | 2023-03-09 |
Foreign References:
| JP2017214662A | 2017-12-07 | |||
| CN109580586A | 2019-04-05 | |||
| JP2017210689A | 2017-11-30 | |||
| JP2003299924A | 2003-10-21 | |||
| JPH0995848A | 1997-04-08 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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