Title:
PROCESS FOR PRODUCTION OF POLYLACTIC ACID-BASED AIR-THROUGH NONWOVEN FABRIC, AND POLYLACTIC ACID-BASED AIR-THROUGH NONWOVEN FABRIC
Document Type and Number:
WIPO Patent Application WO/2011/118292
Kind Code:
A1
Abstract:
Disclosed is a process for producing an air-through nonwoven fabric, which comprises the steps of: forming a web that comprises composite fibers each comprising a first polylactic acid and a second polylactic acid having a lower melting point than that of the first polylactic acid; subjecting the web to a first air-through treatment at a temperature (T1) that is higher than the glass transition temperature of the second polylactic acid and is lower than the melting point of the second polylactic acid; and subjecting the web that has been subjected to the first air-through treatment to a second air-through treatment at a temperature (T2) that is equal to or higher than a temperature lower by -5˚C than the melting point of the second polylactic acid and is equal to or lower than a temperature that is higher by 15˚C than the melting point of the second polylactic acid for the purpose of producing the air-through nonwoven fabric. The process is characterized in that the air-through nonwoven fabric has a degree of crystallinity of 44 to 68%.
Inventors:
YOSHIDA, Masaki (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, 〒7691602, JP)
吉田 正樹 (〒02 香川県観音寺市豊浜町和田浜１５３１－７ユニ・チャーム株式会社テクニカルセンター内 Kagawa, 〒7691602, JP)
MIZUTANI, Satoshi (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, 〒7691602, JP)
水谷 聡 (〒02 香川県観音寺市豊浜町和田浜１５３１－７ユニ・チャーム株式会社テクニカルセンター内 Kagawa, 〒7691602, JP)
吉田 正樹 (〒02 香川県観音寺市豊浜町和田浜１５３１－７ユニ・チャーム株式会社テクニカルセンター内 Kagawa, 〒7691602, JP)
MIZUTANI, Satoshi (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, 〒7691602, JP)
水谷 聡 (〒02 香川県観音寺市豊浜町和田浜１５３１－７ユニ・チャーム株式会社テクニカルセンター内 Kagawa, 〒7691602, JP)
Application Number:
JP2011/053307
Publication Date:
September 29, 2011
Filing Date:
February 09, 2011
Export Citation:
Assignee:
UNICHARM CORPORATION (182 Shimobun, Kinsei-cho Shikokuchuo-sh, Ehime 11, 〒7990111, JP)
ユニ・チャーム株式会社 (〒11 愛媛県四国中央市金生町下分１８２番地 Ehime, 〒7990111, JP)
YOSHIDA, Masaki (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, 〒7691602, JP)
吉田 正樹 (〒02 香川県観音寺市豊浜町和田浜１５３１－７ユニ・チャーム株式会社テクニカルセンター内 Kagawa, 〒7691602, JP)
MIZUTANI, Satoshi (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, 〒7691602, JP)
ユニ・チャーム株式会社 (〒11 愛媛県四国中央市金生町下分１８２番地 Ehime, 〒7990111, JP)
YOSHIDA, Masaki (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, 〒7691602, JP)
吉田 正樹 (〒02 香川県観音寺市豊浜町和田浜１５３１－７ユニ・チャーム株式会社テクニカルセンター内 Kagawa, 〒7691602, JP)
MIZUTANI, Satoshi (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, 〒7691602, JP)
International Classes:
D04H1/54
Attorney, Agent or Firm:
AOKI, Atsushi et al. (SEIWA PATENT & LAW, Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chome, Minato-k, Tokyo 23, 〒1058423, JP)
Claims:
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