PACKAGING MATERIAL FILM, PACKAGING MATERIAL, PACKAGING BAG, AND PACKAGE BODY
The present disclosure relates to a packaging material film including a first resin layer that contains a polyolefin resin and fillers. In a first embodiment, protrusions are formed on a surface of the first resin layer by the fillers, and a water sliding angle at room temperature of an oil film on the surface of the first resin layer is 20° or less. In a second embodiment, a ratio Y/X of a surface area ratio Y of a surface of the first resin layer with respect to an arithmetic mean height Sa X μm of the surface of the first resin layer is 0.4 to 8.0 μm −1 .
1 . A packaging material film comprising:
a first resin layer containing a polyolefin resin and fillers,
wherein
protrusions are formed on a surface of the first resin layer by the fillers, and
a water sliding angle at room temperature of an oil film on the surface of the first resin layer is 20° or less as measured by a measurement method including,
a) A packaging bag, which is formed by using a packaging material including a substrate and the packaging material film provided on the substrate such that the first resin layer is disposed on an inner side thereof, is provided.
b) A package body including the packaging bag and an oil-in-water dispersion-type content enclosed in the packaging bag is prepared.
c) The package body is subjected to a retort treatment and a boiling treatment.
d) A water sliding angle at room temperature on an oil film formed on a surface of the first resin layer is measured using a contact angle meter under conditions of a liquid amount of 20 μL and a speed of 90°/min.
2 . The packaging material film according to claim 1 , wherein an amount of the oil film is 0.2 to 1.2 g/200 cm 2 .
3 . A packaging material film comprising:
a first resin layer containing a polyolefin resin and fillers,
wherein a ratio Y/X of a surface area ratio Y of a surface of the first resin layer with respect to an arithmetic mean height Sa X μm of the surface of the first resin layer is 0.4 to 8.0 μm −1 .
4 . The packaging material film according to claim 3 , wherein a projected area ratio of protrusions formed by the fillers on the surface of the first resin layer is 8 to 45%.
5 . The packaging material film according to claim 1 , wherein the fillers include a porous filler.
6 . The packaging material film according to claim 1 , wherein the first resin layer further contains an elastomer component.
7 . A packaging material comprising:
a substrate; and
a packaging material film provided on the substrate,
wherein the packaging material film is composed of the packaging material film according to claim 1 , and
a surface of the first resin layer of the packaging material film on a side opposite to the substrate is exposed.
8 . A packaging bag for containing an oil-in-water dispersion-type content,
the packaging bag being formed using the packaging material according to claim 7 , the first resin layer being disposed on an inner side thereof.
9 . A package body comprising:
the packaging bag according to claim 8 ; and
an oil-in-water dispersion-type content enclosed in the packaging bag.
10 . The packaging material film according to claim 3 , wherein the fillers include a porous filler.
11 . The packaging material film according to claim 3 , wherein the first resin layer further contains an elastomer component.
12 . A packaging material comprising:
a substrate; and
a packaging material film provided on the substrate,
wherein the packaging material film is composed of the packaging material film according to claim 3 , and
a surface of the first resin layer of the packaging material film on a side opposite to the substrate is exposed.
13 . A packaging bag for containing an oil-in-water dispersion-type content,
the packaging bag being formed using the packaging material according to claim 12 , the first resin layer being disposed on an inner side thereof.
14 . A package body comprising:
the packaging bag according to claim 13 ; and
an oil-in-water dispersion-type content enclosed in the packaging bag.