# US 10,118,738 B2 · Layer separating container

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- Number: US 10,118,738 B2
- Document ID: US10118738B2
- Status: Granted
- Kind: B2
- Application number: 14/917,996
- Filed: 2014-09-18
- Published: 2016-08-04
- Granted: 2018-11-06
- Earliest claimed: 2013-09-27
- Assignees: Kyoraku Co., Ltd.
- Applicants: Kyoraku Co., Ltd.
- Inventors: Shinsuke Taruno
- Web page: https://patentgrep.com/patent/US10118738B2

## CPC

- B65D 35/14: with linings or inserts
- B05B 11/026: {Membranes separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container}
- B05B 11/048: {characterised by the container, e.g. this latter being surrounded by an enclosure, or the means for deforming it (B05B11/041, B05B11/046 take precedence)}
- B32B 1/00: Layered products having a non-planar shape
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- B32B 2323/10: Polypropylene
- B32B 2439/02: Open containers
- 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
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

Provided is a delamination container that smoothly peels an inner layer from an outer layer in a body and can prevent the peel of an inner layer from an outer layer at an opening. A delamination container includes a body configured to contain contents and an opening through which the contents from the body are discharged. The body and the opening each include an outer layer and an inner layer. The inner layer peels from the outer layer and shrinks with a reduction in the contents. The inner layer includes, as an outermost layer, a layer having a standard peel strength of about 7 to 12 g/15 mm.

## Claims

### Claim 1

A delamination container having laminated outer and inner layers, comprising:
a body configured to contain contents; and
an opening through which the contents from the body are discharged, wherein
the outer layer comprises a body outer layer at the body and an opening outer layer at the opening,
the inner layer comprises a body inner layer at the body and an opening inner layer at the opening,
the inner layer peels from the outer layer and shrinks with a reduction in the contents,
the inner layer comprises a plurality of layers including an inner surface layer, a bonding layer, and an outermost layer, wherein the outermost layer is an ethylene-vinyl alcohol copolymer layer having a standard peel strength of 7 to 12 g/15 mm, and
the standard peel strength is a peel strength measured when the inner layer is peeled from the outer layer for a first time.

### Claim 2 (depends on 1)

The delamination container of claim 1, wherein the ethylene-vinyl alcohol copolymer layer has the property of oxygen absorption.

### Claim 3 (depends on 1)

The delamination container of claim 1, wherein the ethylene-vinyl alcohol copolymer layer has an ethylene content of 30 mol % or less.

### Claim 4 (depends on 1)

The delamination container of claim 1, wherein the outer layer comprises a plurality of layers including a polypropylene layer as an innermost layer.