WE CLAIM:
1. A sealant film comprising:
a first layer, which contains a propylene homopolymer (A), a
5 propylene-ethylene random copolymer (B), and an ethylene-α-olefin
copolymer elastomer (C1),
wherein a content of the ethylene-α-olefin copolymer elastomer
(C1) is 5.0 to 11.5 parts by mass with respect to a total amount of 100
parts by mass of the propylene homopolymer (A) and the
10 propylene-ethylene random copolymer (B).
The sealant film according to Claim 1, wherein a mass ratio of a
content of the propylene homopolymer (A) to a content of the
propylene-ethylene random copolymer (B) is 0.40 to 0.95.
15
A sealant film comprising:
a first layer, which contains a propylene homopolymer (A), a
propylene-ethylene random copolymer (B), and a
propylene-ethylene-α-olefin copolymer elastomer (C2),
20 wherein a content of the propylene-ethylene-α-olefin copolymer
elastomer (C2) is 5.0 to 14.5 parts by mass with respect to a total
amount of 100 parts by mass of the propylene homopolymer (A) and the
propylene-ethylene random copolymer (B).
25 The sealant film according to Claim 3, wherein a mass ratio of a
content of the propylene homopolymer (A) to a content of the propylene-ethylene random copolymer (B) is 0.10 to 0.95.
A sealant film comprising:
a first layer, which contains a propylene homopolymer (A), a
5 propylene-ethylene random copolymer (B), and a propylene-α-olefin
copolymer elastomer (C3),
wherein a content of the propylene-α-olefin copolymer
elastomer (C3) is 5.0 to 25.0 parts by mass with respect to a total
amount of 100 parts by mass of the propylene homopolymer (A) and the
10 propylene-ethylene random copolymer (B).
The sealant film according to Claim 5, wherein a mass ratio of a
content of the propylene homopolymer (A) to a content of the
propylene-ethylene random copolymer (B) is 0.12 to 0.95.
15
The sealant film according to any one of Claims 1 to 6,
comprising:
the first layer; and
a second layer, which contains a propylene-ethylene block
20 copolymer (D) and an ethylene-propylene copolymer elastomer (E).
The sealant film according to Claim 7, comprising, in the
following order:
the first layer;
25 the second layer; and
a third layer, which contains the propylene homopolymer (A) and the propylene-ethylene random copolymer (B).
The sealant film according to Claim 7 or 8, wherein the second
layer contains 90% to 50% by mass of the propylene-ethylene block
5 copolymer (D) and 10% to 50% by mass of the ethylene-propylene
copolymer elastomer (E).
The sealant film according to any one of Claims 7 to 9, wherein
a thickness of the second layer is 20 μm or more.