Title:
METHOD FOR PRODUCING POLYOLEFIN RESIN FILM
Document Type and Number:
WIPO Patent Application WO/2023/176482
Kind Code:
A1
Abstract:
[Problem] To provide an environmentally friendly polyolefin resin film which, as a product, fluctuates little in biomass ratio, has few defects, and thereby gives packaging materials with a low reject rate. [Solution] A method for producing a polyolefin resin film, the method comprising: a step in which masterbatch pellets comprising plant-derived, linear, low-density polyethylene and a polypropylene homopolymer and/or a propylene/α-olefin random copolymer are transferred to a mixing hopper; a step in which the mixed pellets are transferred to a standby hopper and then to an extruder; a step in which the mixed pellets are melt-kneaded with the extruder; and a step in which a molten resin sheet is extruded from the extruder and cooled with a cooling roll to form an unstretched sheet.
Inventors:
TOMATSU WAKATO (JP)
ENDO TAKURO (JP)
ENDO TAKURO (JP)
Application Number:
PCT/JP2023/007839
Publication Date:
September 21, 2023
Filing Date:
March 02, 2023
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C08J3/22; B29B7/60; B29C31/02; B29C48/285; B29C48/305; C08J5/18; C08L23/00; C08L23/06; C08L23/12; C08L23/14
Domestic Patent References:
| WO2016152835A1 | 2016-09-29 |
Foreign References:
| JP2020032727A | 2020-03-05 | |||
| JP2003261718A | 2003-09-19 | |||
| JP2011252082A | 2011-12-15 | |||
| JP2011037453A | 2011-02-24 |
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