# US 8,784,958 B2 · Multilayer film and container

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- Number: US 8,784,958 B2
- Document ID: US8784958B2
- Status: Granted
- Kind: B2
- Application number: 12/528,305
- Filed: 2008-02-18
- Published: 2010-06-10
- Granted: 2014-07-22
- Earliest claimed: 2007-02-23
- Assignees: Otsuka Pharmaceutical Factory, Inc.
- Applicants: Fujio Inoue; Isamu Tateishi; Yasushi Morimoto
- Inventors: Fujio Inoue; Isamu Tateishi; Yasushi Morimoto
- Web page: https://patentgrep.com/patent/US8784958B2

## CPC

- A61J 1/2093: {Containers having several compartments for products to be mixed}
- B32B 27/08: of synthetic resin
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B65D 65/40: Applications of laminates for particular packaging purposes {(B65D1/0215, B65D1/28, B65D3/22, B65D5/0281, B65D5/563, B65D9/30, B65D29/02, B65D31/02, B65D75/26, B65D77/2024, B65D81/1275, B65D81/3811, B65D81/3823, B65D81/3834, B65D81/3846, B65D81/3858, B65D81/3874, B65D81/3886, B65D81/3897 take precedence; laminates per se or laminated packages characterised by the composition or)}
- A61J 1/10: Bag-type containers
- A61J 1/2024: {having peelable seals}
- A61M 2207/00: Methods of manufacture, assembly or production
- B32B 2250/05: 5 or more layers
- B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers
- B32B 2307/306: Resistant to heat
- B32B 2307/412: Transparent
- B32B 2307/558: Impact strength, toughness
- B32B 2307/748: Releasability
- B32B 2439/00: Containers; Receptacles
- B32B 2439/80: Medical packaging
- Y10T 428/13: Hollow or container type article [e.g., tube, vase, etc.]
- Y10T 428/1303: Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
- Y10T 428/1352: Polymer or resin containing [i.e., natural or synthetic]
- Y10T 428/1359: Three or more layers [continuous layer]
- Y10T 428/139: Open-ended, self-supporting conduit, cylinder, or tube-type article
- Y10T 428/2495: Thickness [relative or absolute]
- Y10T 428/31913: Monoolefin polymer
- Y10T 428/31924: Including polyene monomers
- A61J: CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

In a multilayer film including a first layer (1), a second layer (2), a third layer (3), a fourth layer (4) and a fifth layer (5) stacked in this order, the first layer (1) is composed of a propylene-ethylene random copolymer and/or a polypropylene homopolymer, and the second layer (2) and the fourth layer (4) are each composed of a mixture of a propylene-ethylene random copolymer and an α-olefin elastomer. The third layer (3) is composed of a mixture of a polycycloolefin and polyethylene, and the fifth layer (5) is composed of a mixture containing a polypropylene homopolymer and a propylene-ethylene random copolymer in a weight ratio of 90:10 to 10:90. A container is formed of the multilayer film with an outer layer and an inner layer thereof being defined by the first layer (1) and the fifth layer (5), respectively.

## Claims

### Claim 1

A multilayer film comprising:
a first layer;
a second layer provided on the first layer;
a third layer provided on the second layer;
a fourth layer provided on the third layer; and
a fifth layer provided on the fourth layer;
wherein
the first layer comprises a propylene-ethylene random copolymer having a melt flow rate not less than 0.5 g/10 minutes and not greater than 10 g/10 minutes as measured at 230° C.;
the second layer and the fourth layer each comprise a mixture of a propylene-ethylene random copolymer and an α-olefin elastomer;
the third layer comprises a mixture of a polycycloolefin and a polyethylene; and
the fifth layer comprises a mixture containing a polypropylene homopolymer having a melt flow rate not less than 0.5 g/10 minutes and not greater than 5 g/10 minutes as measured at 230° C. and a propylene-ethylene random copolymer having a melt flow rate not less than 0.5 g/10 minutes and not greater than 10 g/10 minutes as measured at 230° C. in a weight ratio of 90:10 to 10:90 and;
the propylene-ethylene random copolymer in the second layer and the fourth layer is a mixture of a low-MFR propylene-ethylene random copolymer having a melt flow rate not less than 0.5 g/10 minutes and less than 5 g/10 minutes as measured at 230° C. and a high-MFR propylene-ethylene random copolymer having a melt flow rate not less than 5 g/10 minutes and not greater than 10 g/10 minutes as measured at 230° C.

### Claim 2 (depends on 1)

The multilayer film according to claim 1, wherein the mixture for the third layer contains the polycycloolefin in a proportion of 50 to 95% by weight based on the total weight thereof.

### Claim 3 (depends on 1)

The multilayer film according to claim 1, wherein the mixture for the second layer and the fourth layer contains the α-olefin elastomer in a proportion of 30 to 60% by weight based on the total weight thereof.

### Claim 4 (depends on 1)

The multilayer film according to claim 1, wherein a thickness of the second layer is not less than 0.8 times a thickness of the fourth layer.

### Claim 5 (depends on 4)

The multilayer film according to claim 4, wherein the thickness of the second layer is not greater than 1.2 times the thickness of the fourth layer.

### Claim 6 (depends on 1)

The multilayer film according to claim 1, wherein a total thickness of the second layer and the fourth layer is not less than 50% of a thickness of the multilayer film.

### Claim 7

A container formed of a multilayer film including a first layer, a second layer provided on the first layer, a third layer provided on the second layer, a fourth layer provided on the third layer, and a fifth layer provided on the fourth layer, wherein
the first layer comprises a propylene-ethylene random copolymer having a melt flow rate not less than 0.5 g/10 minutes and not greater than 10 g/10 minutes as measured at 230° C.,
the second layer and the fourth layer each comprise a mixture of a propylene-ethylene random copolymer and an α-olefin elastomer,
the third layer comprises a mixture of a polycycloolefin and a polyethylene,
the fifth layer comprises a mixture containing a polypropylene homopolymer having a melt flow rate not less than 0.5 g/10 minutes and not greater than 5 g/10 minutes as measured at 230° C. and a propylene-ethylene random copolymer having a melt flow rate not less than 0.5 g/10 minutes and not greater than 10 g/10 minutes as measured at 230° C. in a weight ratio of 90:10 to 10:90,
the propylene-ethylene random copolymer contained in the second layer and the fourth layer is a mixture of a low-MFR propylene-ethylene random copolymer having a melt flow rate not less than 0.5 g/10 minutes and less than 5 g/10 minutes as measured at 230° C. and a high-MFR propylene-ethylene random copolymer having a melt flow rate not less than 5 g/10 minutes and not greater than 10 g/10 minutes as measured at 230° C., and
the first layer and the fifth layer respectively serve as an outer layer and an inner layer of the container.