Gas barrier film
AssigneeToppan Printing Co., Ltd.
InventorsJunichi Kaminaga, Sayaka Hoshi, Yuki Omura, Seiya Suzuki, Yoshiki Koshiyama
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Abstract
A gas barrier film including a substrate film containing a resin, and a gas barrier layer that has oxygen barrier properties and is in contact with at least one surface of the substrate film, a surface of the gas barrier layer has a flat portion, and a plurality of protrusions that protrude from the flat portion. The number of protrusions that satisfy the following formula (1) is 0 to 200 per mm2, and the number of protrusions that satisfy the following formula (2) is 20 or more per mm2; d×2≤f(1); and 0.2≤f<d×2(2), where d represents a thickness (μm) of the gas barrier layer, and f represents a height (μm) of each of the plurality of protrusions.
Claims16
A gas barrier film, comprising:
- a substrate film containing a resin;
- and
- a gas barrier layer that has oxygen barrier properties and is located in contact with at least one surface of the substrate film, wherein:
- a surface of the gas barrier layer has
- a flat portion, and
- a plurality of protrusions that protrude from the flat portion;
- and
- the number of protrusions that satisfy the following formula (1) is 0 to 100 per mm2, and
- the number of protrusions that satisfy the following formula (2) is 20 to 200 per mm2:
- d×2≤f (1);
- and
- 0.2≤f<d×2 (2),
- where d represents a thickness (μm) of the gas barrier layer, and f represents a height (μm) of each of the plurality of protrusions.
A gas barrier film, comprising:
- a substrate film containing a resin;
- and
- a gas barrier layer which is an oxygen barrier film formed by a wet coating method and is located in contact with at least one surface of the substrate film, wherein:
- the surface of the substrate film that is in contact with the gas barrier layer has a flat portion and a plurality of protrusions that protrude from the flat portion;
- and
- in a randomly selected region of 0.66 mm2 or more on the surface of the substrate film in contact with the gas barrier layer, measuring a height of each of the plurality of protrusions by using a 3D measurement laser microscope, a thickness t(μm) of the gas barrier layer satisfies the following formula (3):
- 0.25×h+0.15≤t≤0.8×h (3),
- where h represents an average height (μm) of protrusions having a height of 0.3 μm to 1.5 μm.
Dependencies are inferred from the claim text.