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Title:
MULTILAYER FILM
Document Type and Number:
WIPO Patent Application WO/2024/070720
Kind Code:
A1
Abstract:
The present invention provides a multilayer film which has improved appearance (particularly, with fewer wrinkles), specifically, a multilayer film which is improved in terms of the degree of occurrence of wrinkles, thereby having fewer wrinkles.　This multilayer film comprises: an unstretched polypropylene film which contains a propylene polymer that satisfies requirements (i) to (iii); and an inorganic oxide layer which is in contact with the film.　(i) The melt flow rate (MFR) as measured at 230°C under a load of 2.16 kgf is within the range of 3 g/10 minutes to 25 g/10 minutes. (ii) The ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) as determined by GPC is within the range of 6 to 15. (iii) The ratio (Mz/Mn) of the Z-average molecular weight (Mz) to the number average molecular weight (Mn) as determined by GPC is within the range of 40 to 150.

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Inventors:
MURAKAMI TOMOYA (JP)
BIRUKAWA JUN (JP)
OKAWA TOMOYA (JP)
Application Number:
PCT/JP2023/033477
Publication Date:
April 04, 2024
Filing Date:
September 14, 2023
Export Citation:
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Assignee:
PRIME POLYMER CO LTD (JP)
International Classes:
B32B27/32; B32B9/00; B65D65/02; B65D65/40
Foreign References:
JP2022088132A2022-06-14
JP2021191842A2021-12-16
JP2015124272A2015-07-06
JP2006143975A2006-06-08
JP2018176605A2018-11-15
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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