Title:
POLYOLEFIN FILM, AND RELEASE FILM
Document Type and Number:
Japanese Patent JP2020203486
Kind Code:
A
Abstract:
To provide a polyolefin film excellent in releasing property and quality.SOLUTION: A polyolefin film is provided which has laminated configuration composed of at least a surface layer and an inner layer on both sides, and in which at least one surface layer contains at least one of a polypropylene resin having a melting point of 50°C or higher and 135°C or lower and a polypropylene resin having a melt flow rate measured at 230°C and a load of 21.18 N of 5 g/10 min or more and 30 g/10 min or less, the inner layer is a stretched film containing a polyolefin resin having a melting point of 155°C or higher as a main component, at least one surface (surface A) of the polyolefin film has average roughness Sa of 65-600 nm, the surface A has a peak height of Sp and a valley depth Sv and has a value Sp/Sv of 2.5 or less, Sp/Sv being a ratio of the peak height Sp to the valley depth Sv, and the polyolefin film has a haze of 30% or less.SELECTED DRAWING: None
Inventors:
OKADA KAZUMA
OKURA MASATOSHI
YAMANAKA KOHEI
OKURA MASATOSHI
YAMANAKA KOHEI
Application Number:
JP2020137991A
Publication Date:
December 24, 2020
Filing Date:
August 18, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
B32B27/32; B32B27/00
Domestic Patent References:
| JP2018141122A | 2018-09-13 | |||
| JP2015107612A | 2015-06-11 | |||
| JPH07214660A | 1995-08-15 | |||
| JPH01230641A | 1989-09-14 |
Foreign References:
| WO2018147355A1 | 2018-08-16 | |||
| WO2018147334A1 | 2018-08-16 | |||
| WO2017077752A1 | 2017-05-11 |
Attorney, Agent or Firm:
Sakai International Patent Office