# US 10,864,710 B2 · Film

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- Number: US 10,864,710 B2
- Document ID: US10864710B2
- Status: Granted
- Kind: B2
- Application number: 15/758,374
- Filed: 2016-09-07
- Published: 2018-08-30
- Granted: 2020-12-15
- Earliest claimed: 2015-09-09
- Assignees: Asahi Kasei Kabushiki Kaisha
- Applicants: Asahi Kasei Kabushiki Kaisha
- Inventors: Noriko Yagi; Yasuhiro Kusanose; Hiroyuki Ichino; Masahiro Fujiwara
- Web page: https://patentgrep.com/patent/US10864710B2

## CPC

- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 25/16: comprising polydienes {homopolymers} or poly-halodienes {homopolymers (B32B25/12 takes precedence)}
- B32B 27/08: of synthetic resin
- B32B 27/18: characterised by the use of special additives
- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 27/26: using curing agents
- B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers}
- C08F 293/00: Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule (on to polymers modified by introduction of unsaturated end groups C08F290/02)
- B29K 2023/12: {PP, i.e. polypropylene}
- B29K 2067/00: Use of polyesters {or derivatives thereof}, as moulding material
- B32B 2250/03: 3 layers
- B32B 2250/24: All layers being polymeric
- B32B 2250/40: Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
- B32B 2264/025: Acrylic resin particles, e.g. polymethyl methacrylate or ethylene-acrylate copolymers
- B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers
- B32B 2307/31: Heat sealable
- B32B 2307/412: Transparent
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2307/558: Impact strength, toughness
- B32B 2307/7246: Water vapor barrier
- B32B 2405/00: Adhesive articles, e.g. adhesive tapes
- B32B 2439/46: Bags
- B32B 2439/70: Food packaging
- B32B 2439/80: Medical packaging
- B32B 2457/00: Electrical equipment
- B32B 2479/00: Furniture
- B32B 2605/08: Cars
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

## Abstract

The disclosure provides a film wherein an outer layer includes a polypropylene resin, an intermediate layer includes a polypropylene resin and a hydrogenated block copolymer (a), and an inner layer includes a polypropylene resin.

## Claims

### Claim 1

A film comprising at least an outer layer, an intermediate layer, and an inner layer, wherein
the outer layer comprises a polypropylene resin,
the intermediate layer comprises a polypropylene resin and a hydrogenated block copolymer (a), and
the inner layer comprises a polypropylene resin, and wherein
a content of the vinyl aromatic compound monomer unit in the hydrogenated block copolymer (a) is 3 to 13% by mass,
the hydrogenated block copolymer (a) has a degree of hydrogenation of 90 mol %,
an amount of butylene and/or amount of propylene in the hydrogenated block copolymer (a) is 60 to 85 mol % based on 100 mol % of the conjugated diene compound unit in total,
the hydrogenated block copolymer (a) has a crystallization peak at 0 to 60° C.,
the hydrogenated block copolymer (a) has a heat quantity of crystallization of 1.0 to 8.0 J/g, and
the hydrogenated block copolymer (a) has a Shore A hardness of 25 to 55.

### Claim 2 (depends on 1)

The film according to claim 1, wherein the outer layer has a thickness of 5 to 50 μm, the intermediate layer has a thickness of 100 to 200 μm, and the inner layer has a thickness of 5 to 50 μm.

### Claim 3 (depends on 1)

The film according to claim 1, wherein
the outer layer comprises the hydrogenated block copolymer (a) and/or a hydrogenated block copolymer (b1) (provided that the block copolymer (b1) does not comprise the polymer block mainly comprising a conjugated diene compound (C)),
the hydrogenated block copolymer (b1) comprises a polymer block mainly comprising a conjugated diene compound (B1) and a polymer block mainly comprising a vinyl aromatic compound (S1),
a content of the polymer block mainly comprising a conjugated diene compound (B1) is 75 to 92% by mass, and a content of the polymer block mainly comprising a vinyl aromatic compound (S1) is 8 to 25% by mass in the hydrogenated block copolymer (b1),
a vinyl bond content before hydrogenation of the polymer block mainly comprising a conjugated diene compound (B1) is 40 to 100 mol %, and the hydrogenated block copolymer (b1) has a degree of hydrogenation of 80 mol % or more,
a content of the polypropylene resin in the outer layer is 60 to 100% by mass, and
a content of the hydrogenated block copolymer (a) and/or hydrogenated block copolymer (b1) in the outer layer is 0 to 40% by mass.

### Claim 4 (depends on 1)

The film according to claim 1, wherein
the inner layer comprises the hydrogenated block copolymer (a) and/or the hydrogenated block copolymer (b1) (provided that the block copolymer (b1) does not comprise the polymer block mainly comprising a conjugated diene compound (C)),
the hydrogenated block copolymer (b1) comprises a polymer block mainly comprising a conjugated diene compound (B1) and a polymer block mainly comprising a vinyl aromatic compound (S1),
a content of the polymer block mainly comprising a conjugated diene compound (B1) is 75 to 92% by mass and a content of the polymer block mainly comprising a vinyl aromatic compound (S1) is 8 to 25% by mass in the hydrogenated block copolymer (b1),
a vinyl bond content before hydrogenation of the polymer block mainly comprising a conjugated diene compound (B1) is 40 to 100 mol %, and the hydrogenated block copolymer (b1) has a degree of hydrogenation of 80 mol % or more,
a content of the polypropylene resin in the inner layer is 50 to 95% by mass, and
a content of the hydrogenated block copolymer (a) and/or hydrogenated block copolymer (b1) in the inner layer is 5 to 50% by mass.

### Claim 5 (depends on 1)

The film according to claim 1, wherein the hydrogenated block copolymer (a) comprises two or more of the polymer blocks mainly comprising a conjugated diene compound (B) in a molecule, and a content of a polymer block (B-1) present at a terminal of the hydrogenated block copolymer (a) of the polymer blocks mainly comprising a conjugated diene compound (B) is 1 to 10% by mass in the hydrogenated block copolymer (a).

### Claim 6 (depends on 1)

The film according to claim 1, wherein
the outer layer further comprises a hydrogenated block copolymer (b2),
the hydrogenated block copolymer (b2) comprises a polymer block mainly comprising a conjugated diene compound (B2) and a polymer block mainly comprising a vinyl aromatic compound (S2),
a content of the polymer block mainly comprising a conjugated diene compound (B2) is 75 to 92% by mass and a content of the polymer block mainly comprising a vinyl aromatic compound (S2) be 8 to 25% by mass in the hydrogenated block copolymer (b2),
a vinyl bond content before hydrogenation of the polymer block mainly comprising a conjugated diene compound (B2) is 62 to 100 mol %, and the hydrogenated block copolymer (b2) has a degree of hydrogenation of 80 mol % or more, and
the hydrogenated block copolymer (b2) comprises
two or more of the polymer blocks mainly comprising a conjugated diene compound (B2) in a molecule, and a content of a polymer block (B-2) present at a terminal of the hydrogenated block copolymer (b2) of the polymer block mainly comprising a conjugated diene compound (B2) is 1 to 10% by mass in the hydrogenated block copolymer.

### Claim 7 (depends on 1)

The film according to claim 1, wherein
the inner layer further comprises a hydrogenated block copolymer (b2),
the hydrogenated block copolymer (b2) comprises a polymer block mainly comprising a conjugated diene compound (B2) and a polymer block mainly comprising a vinyl aromatic compound (S2),
a content of the polymer block mainly comprising a conjugated diene compound (B2) is 75 to 92% by mass, and a content of the polymer block mainly comprising a vinyl aromatic compound (S2) is 8 to 25% by mass in the hydrogenated block copolymer (b2),
a vinyl bond content before hydrogenation of the polymer block mainly comprising a conjugated diene compound (B2) is 62 to 100 mol %, and the hydrogenated block copolymer (b2) has a degree of hydrogenation of 80 mol % or more, and
the hydrogenated block copolymer (b2) comprises
two or more of the polymer blocks mainly comprising a conjugated diene compound (B2) in a molecule, and a content of a polymer block (B-2) present at a terminal of the hydrogenated block copolymer (b2) of the polymer block mainly comprising a conjugated diene compound (B2) is 1 to 10% by mass in the hydrogenated block copolymer.

### Claim 8 (depends on 1)

The film according to claim 1, wherein the hydrogenated block copolymer (a) has a weight average molecular weight (Mw) of 100,000 to 300,000.

### Claim 9 (depends on 1)

The film according to claim 1, wherein the hydrogenated block copolymer (a) has a weight average molecular weight (Mw) of 100,000 to 300,000, and a ratio of a weight average molecular weight (Mw) to a number average molecule weight (Mn) of the hydrogenated block copolymer (a), (Mw)/(Mn), is 1.01 to 1.30.

### Claim 10 (depends on 1)

The film according to claim 1, wherein an integrated amount of elution at −20° C. or less measured by cross-fractionation chromatography (CFC) is 0.1% or more and less than 40% based on the total integrated amount of elution, an integrated amount of elution in the range of more than −20° C. and less than 60° C. is 20% or more and less than 95% based on the total integrated amount of elution, and an integrated amount of elution in the range of 60° C. or more and 150° C. or less is 5% or more and less than 70% based on the total integrated amount of elution.

### Claim 11 (depends on 1)

The film according to claim 1, wherein the molecular weight distribution (Mw/Mn) of an eluted component in the range of 10° C. or more and less than 60° C. measured by cross-fractionation chromatography (CFC) is 1.05 or more and 1.50 or less.