# US 11,077,998 B2 · Packaging bag and manufacturing method therefor

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- Number: US 11,077,998 B2
- Document ID: US11077998B2
- Status: Granted
- Kind: B2
- Application number: 16/478,636
- Filed: 2018-01-18
- Published: 2019-11-14
- Granted: 2021-08-03
- Earliest claimed: 2017-01-20
- Assignees: Kyodo Printing Co., Ltd.
- Applicants: Kyodo Printing Co., Ltd.
- Inventors: Atsushi Yasuda; Yuki Narita; Masa Inoue
- Web page: https://patentgrep.com/patent/US11077998B2

## CPC

- 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)}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/085: comprising polyolefins
- B32B 15/09: comprising polyesters
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- B32B 27/18: characterised by the use of special additives
- B32B 27/30: comprising vinyl {(co)polymers; comprising acrylic (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B65D 81/264: {for absorbing liquids}
- B65D 81/266: {for absorbing gases, e.g. oxygen absorbers or desiccants (B65D51/244, B65D51/30 take precedence)}
- A61J 1/10: Bag-type containers
- A61J 1/1468: {Containers characterised by specific material properties}
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/20: Inorganic coating
- B32B 2255/26: Polymeric coating
- B32B 2264/10: Inorganic particles
- B32B 2264/102: Oxide or hydroxide
- B32B 2264/1021: Silica
- B32B 2264/302: Average diameter in the range from 100 nm to 1000 nm
- B32B 2264/303: Average diameter greater than 1µm
- B32B 2307/31: Heat sealable
- B32B 2307/412: Transparent
- B32B 2307/518: bi-axially
- B32B 2307/72: Density
- B32B 2307/7244: Oxygen barrier
- B32B 2307/74: Oxygen absorber
- B32B 2439/46: Bags
- B32B 2439/80: Medical packaging
- 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
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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

## Abstract

A packaging bag 100 having a heat-sealed part at an end and thereby formed into a bag shape, wherein the heat-sealed part 110 has an oxygen absorption layer 10, a water-vapor absorption layer 20, and a barrier layer 30, and wherein the oxygen absorption layer 10 contains an oxygen-deficient cerium oxide 11.

## Claims

### Claim 1

A packaging bag having on an edge thereof a heat seal part with which the packaging bag is formed into a bag shape, said packaging bag comprising:
an oxygen absorbing laminate film comprising a barrier layer and an oxygen absorbing layer, wherein the oxygen absorbing layer comprises an oxygen-deficient cerium oxide, and
a water vapor absorbing laminate film comprising a barrier layer and a water vapor absorbing layer,
wherein the oxygen absorbing laminate film and the water vapor absorbing laminate film are arranged opposite to each other so that the oxygen absorbing layer and the water vapor absorbing layer are located inwardly such that neither the oxygen absorbing layer nor the water vapor absorbing layer faces the interior of the packaging bag via the other absorbing layer, and
wherein edges of the oxygen absorbing laminate film and the water vapor absorbing laminate film are heat-sealed to form the heat seal part and thereby form a bag shape.

### Claim 2 (depends on 1)

The packaging bag according to claim 1, wherein the water vapor absorbing layer comprises a zeolite.

### Claim 3 (depends on 1)

The packaging bag according to claim 1, wherein the heat seal part comprises a barrier layer, an oxygen absorbing layer, a water vapor absorbing layer, and a barrier layer in this order.

### Claim 4 (depends on 1)

The packaging bag according to claim 1, wherein the heat seal part includes a layer having an easy-peel function.

### Claim 5 (depends on 1)

The packaging bag according to claim 1, wherein a skin layer is included on one surface or both surfaces of the oxygen absorbing layer.

### Claim 6 (depends on 1)

The packaging bag according to claim 1, wherein a skin layer is included on one surface or both surfaces of the water vapor absorbing layer.

### Claim 7 (depends on 1)

A method for manufacturing the packaging bag according to claim 1, comprising:
preparing an oxygen absorbing laminate film comprising a barrier layer and an oxygen absorbing layer, and a water vapor absorbing laminate film comprising a barrier layer and a water vapor absorbing layer,
arranging the oxygen absorbing laminate film and the water vapor absorbing laminate film opposite each other so that the oxygen absorbing layer and the water vapor absorbing layer are located inwardly, and
heat sealing the edges of the oppositely-arranged oxygen absorbing film and water vapor absorbing film to form a heat seal part and thereby form a bag shape.

### Claim 8 (depends on 7)

The method according to claim 7, wherein the water vapor absorbing layer comprises a zeolite.

### Claim 9 (depends on 7)

The method according to claim 7, wherein the heat seal part includes a layer having an easy-peel function.

### Claim 10 (depends on 1)

A contents-containing packaging bag, comprising the packaging bag according to claim 1, and
contents which are sealed in the packaging bag.

### Claim 11 (depends on 10)

The contents-containing packaging bag according to claim 10, wherein the contents are foodstuffs, a medicine, a medical equipment, medical instruments, electronic components, precision machines, and recording materials.

### Claim 12 (depends on 11)

The contents-containing packaging bag according to claim 11, wherein the contents are a pharmaceutical or a medical instrument.

### Claim 13 (depends on 1)

The packaging bag according to claim 1, wherein
the oxygen absorbing laminate film comprises, in this order, a surface resin layer, the barrier layer, a first skin layer, the oxygen absorbing layer, and a second skin layer,
the water vapor absorbing laminate film comprises, in this order, a surface resin layer, the barrier layer, a first skin layer, the water vapor absorbing layer, and a second skin layer, and
wherein, at the heat seal part, the second skin layer of the oxygen absorbing laminate film is in contact with the second skin layer of the water vapor absorbing laminate film.

### Claim 14 (depends on 1)

The packaging bag according to claim 1, wherein
the oxygen absorbing laminate film comprises, in this order, a surface resin layer, the barrier layer, a first skin layer, the oxygen absorbing layer, and a second skin layer,
the water vapor absorbing laminate film comprises, in this order, a surface resin layer, the barrier layer, a first skin layer, the water vapor absorbing layer, a second skin layer, and an easy peel layer, and
wherein, at the heat seal part, the second skin layer of the oxygen absorbing laminate film is in contact with the easy peel layer of the water vapor absorbing laminate film.