Title:
INJECTION-MOLDED THERMOPLASTIC SATURATED NORBORNENE RESIN, SUBSTRATE OF INFORMATION MEDIUM ELEMENT MADE THEREFROM, AND INFORMATION MEDIUM ELEMENT
Document Type and Number:
WIPO Patent Application WO/1993/003906
Kind Code:
A1
Abstract:
An injection-molded article which is made from a thermoplastic saturated norbornene resin having a number-average molecular weight of 10,000 to 80,000 in terms of a standard polystyrene as determined by gel permeation chromatography using toluene as the solvent and which has a thin-wall part with a width of 20 mm or above and a thickness of 700 mum or less along the direction of flow from the gate. The above resin provides a thin-wall molding with a given shape, a given quality and a thickness of 700 mum or less. When the thin-wall part is a sheet, it is also possible to obtain a sheet which is reduced in an unevenness of the thickness. Further it is possible to obtain a molding excellent in surface smoothness by using a well polished mold.
Inventors:
TAKAHASHI NOBUKAZU (JP)
KOHARA TEIJI (JP)
NATSUUME TADAO (JP)
KOHARA TEIJI (JP)
NATSUUME TADAO (JP)
Application Number:
PCT/JP1992/001027
Publication Date:
March 04, 1993
Filing Date:
August 11, 1992
Export Citation:
Assignee:
NIPPON ZEON CO (JP)
International Classes:
B29C45/00; G02F1/1333; G11B7/24; G11B7/24012; G11B7/24033; G11B7/24047; G11B7/2433; G11B7/253; G11B7/2533; (IPC1-7): B29C45/00; C08F32/08; C08L45/00
Foreign References:
| JPS61188444A | 1986-08-22 | |||
| JPS62181323A | 1987-08-08 | |||
| JPH0229308A | 1990-01-31 |
Other References:
See also references of EP 0600086A4
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