Title:
SODIUM BENZOATE AS NUCLEATING AGENT FOR MONOAXIALLY ORIENTED POLYPROPYLENE FILM
Document Type and Number:
Japanese Patent JP3456667
Kind Code:
B2
Abstract:
PURPOSE: To decrease the shrinkage of a monoaxially oriented polypropylene film and increase the crystallinity thereof.
CONSTITUTION: This invention relates to 1) polypropylene contg. sodium benzoate in a concn. of 1,000 ppm or lower, 2) a monoaxially oriented polypropylene film contg. sodium benzoate, and 3) a process for preparing a monoaxially oriented polypropylene film comprising (1) mixing sodium benzoate at a level of 1,000 ppm into polypropylene, (2) plasticizing the resultant mixture in an extruder, (3) extruding the mixture through a flat sheet die, (4) quenching the resultant polypropylene sheet, and (5) stretching the sheet at the m.p. of polypropylene or lower in the machine direction by a stretching ratio of at least about 4:1.
Inventors:
Likuo Sun
Application Number:
JP3523294A
Publication Date:
October 14, 2003
Filing Date:
February 09, 1994
Export Citation:
Assignee:
FINA TECHNOLOGY, INCORPORATED
International Classes:
B29C55/06; B29D7/01; C08J5/18; C08K5/09; C08K5/098; C08L23/12; B29K23/00; (IPC1-7): C08J5/18; B29C55/06; B29D7/01; C08K5/098; C08L23/12
Domestic Patent References:
| JP55148127A | ||||
| JP1292047A | ||||
| JP3195751A | ||||
| JP63199742A | ||||
| JP1306448A |
Attorney, Agent or Firm:
Heikichi Odashima
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