Title:
HYDROPHILIC FILM AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JP2744760
Kind Code:
B2
Abstract:
PURPOSE: To obtain the film which is useful as a packaging material for medicine, agrochemical, etc., because of its high mechanical properties, water resistance, handleability, and stability at elevated humid temperature by using a resin containing polydioxolane of a specific molecular weight and has a specific crystallnity and spherulite size.
CONSTITUTION: A film which contains polydioxolane and has a number-average molecular weight of 50,000 to 500,000 according to the size exclusion chromatography, a crystallinity of 25 to 75% measured according to the wide angle X-ray diffraction and less then 500μm spherulite size measured with a polarization microscope. The film is obtained by extruding a resin containing polydioxolane into a film at the output temperature of 50 to 200°C and cooling it at -10 to 30°C for 2 seconds to 5 minutes.
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Inventors:
Takashi Namba
Hiroya Kobayashi
Kenji Minami
Hiroya Kobayashi
Kenji Minami
Application Number:
JP5361394A
Publication Date:
April 28, 1998
Filing Date:
March 24, 1994
Export Citation:
Assignee:
Nippon Shokubai Co., Ltd.
International Classes:
C08J5/18; B29C47/00; C08G65/02; C08G65/06; C08G65/08; B29K71/00; B29L7/00; (IPC1-7): C08J5/18; B29C47/00; C08G65/06
Domestic Patent References:
| JP741533A | ||||
| JP741532A |