Title:
NONWOVEN FABRIC OF POLYLACTATE-BASED FILAMENT AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3938950
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a polylactate-based filament nonwoven fabric decomposable in natural environment and having excellent flexibility while keeping mechanical strength and dimensional stability sufficient for practical use.
SOLUTION: This polylactate-based filament nonwoven fabric is produced by using a polylactate-based polymer having a melt flow rate of 1-100g/10min measured in conformity to ASTM D-1238(E) at 190°C, melting the polymer at a temperature between (Tm+15)°C and (Tm+50)°C (Tm is the melting point of the polymer), extruding the molten polymer through a spinneret, depositing the extruded fibers on a moving collection face with a sucking apparatus under opening the fibers to form a web, subjecting the web to partial heat-bonding treatment to form temporarily heat-bonded points and performing a three- dimensional interlocking treatment to release at least a part of the constituent filaments at the temporarily heat-bonded point and three-dimensionally interlock the constituent filaments including the partially released fibers to integrate the fibers as a whole.
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Inventors:
Koichi Nagaoka
Fumio Matsuoka
Naoji Ichinose
Fumio Matsuoka
Naoji Ichinose
Application Number:
JP25607995A
Publication Date:
June 27, 2007
Filing Date:
October 03, 1995
Export Citation:
Assignee:
UNITIKA LTD.
International Classes:
D01F6/84; D04H3/00; D04H5/00; (IPC1-7): D04H3/00; D01F6/84; D04H5/00
Domestic Patent References:
| JP7133511A | ||||
| JP3146757A | ||||
| JP6240553A | ||||
| JP7227338A | ||||
| JP734369A |
Attorney, Agent or Firm:
Yohei Harada
Takao Itagaki
Yoshihiro Morimoto
Takao Itagaki
Yoshihiro Morimoto