Title:
【発明の名称】無方向性ポリプロピレンフィルムの製造方法
Document Type and Number:
Japanese Patent JP2510654
Kind Code:
B2
Abstract:
PURPOSE:To obtain a nondirectional polypropylene film where molecular orientation is not generated, by a method wherein at the time of cooling with a cooling roll, molten polypropylene resin is pressed with a press roll through a supporting belt and sent out under an orientationless state. CONSTITUTION:Polypropylene resin is charged into a T die, melted, extruded downwise and sent to a cooling roll 2 by placing on the surface of a supporting belt 5. Molten polypropylene resin sent to the cooling roll 2 is pressed against the cooling roll 2 by a press roll 3 arranged by facing on the cooling roll 2 through a supporting belt 4 and cooled and a polypropylene film 6 is formed. This polypropylene film 6 is cooled by the cooling roll 2 under orientationless state through the supporting belt 5 and sent out through the cooling roll 2 under the orientationless state. Therefore, molecular orientation is not generated on the manufactured polypropylene film 6, nondirectional polypropylene film is made and becomes structure which is apt to out off bidirectionally such as a longitudinal direction and a direction meeting at right angles with the same.
More Like This:
| WO/2012/120260 | HYDROLYSIS RESISTANT POLYESTER FILMS |
Inventors:
OOSHIMA SHIGEYUKI
KUGE RAIZO
MOGI YOSHIJI
KUGE RAIZO
MOGI YOSHIJI
Application Number:
JP2940088A
Publication Date:
June 26, 1996
Filing Date:
February 10, 1988
Export Citation:
Assignee:
HOSOKAWA YOKO KK
International Classes:
B29C48/08; B29C48/355; B29K23/00; B29L7/00; (IPC1-7): B29C47/88; B29C47/34
Domestic Patent References:
| JP56121736A | ||||
| JP6360726A |
Attorney, Agent or Firm:
Kazuo Sato (2 outside)