# US 11,078,000 B2 · Packaging container and method of producing same

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- Number: US 11,078,000 B2
- Document ID: US11078000B2
- Status: Granted
- Kind: B2
- Application number: 16/709,486
- Filed: 2019-12-10
- Published: 2020-05-07
- Granted: 2021-08-03
- Earliest claimed: 2017-06-13
- Assignees: Toppan Printing Co., Ltd.
- Applicants: Toppan Printing Co., Ltd.
- Inventors: Junji Kikukawa; Koichi Hotta; Megumi Watanabe
- Web page: https://patentgrep.com/patent/US11078000B2

## CPC

- B65D 75/008: {Standing pouches, i.e. "Standbeutel"}
- B31B 70/26: Folding sheets, blanks or webs
- B31B 70/64: by applying heat or pressure (to unite areas where adhesives are applied B31B70/62)
- B31B 70/79: {Coating; Impregnating; Waterproofing; Decoating}
- B32B 27/10: of paper or cardboard
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 29/002: {as the main or only constituent of a layer, which is next to another layer of the same or of a different material (next to a layer of a particular substance B32B9/06; next to a bituminous or tarry layer B32B11/06; next to a water-setting substance layer B32B13/08; next to a metal layer B32B15/12; next to a glass layer B32B17/065; next to a layer formed of natural mineral fibres or particles B32B19/046; next to a wood layer B32B21/06; next to a cellulosic plastic layer B32B23/06; next to a natural or synthetic rubber layer B32B25/06; next to a synthetic resin layer B32B27/10)}
- 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)}
- B65D 75/20: in sheets or blanks doubled around contents and having their opposed free margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
- B65D 81/24: Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants (with thermal insulation B65D81/38)
- B65D 81/3461: {Flexible containers, e.g. bags, pouches, envelopes}
- B31B 2160/102: {obtained from essentially rectangular sheets}
- B31B 2160/20: with structural provision for thickness of contents
- B31B 2170/20: having multi-layered walls, e.g. laminated or lined
- B32B 2250/02: 2 layers
- B32B 2255/12: on paper layer
- B32B 2255/20: Inorganic coating
- B32B 2255/26: Polymeric coating
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2307/71: Resistive to light or to UV
- B32B 2307/718: Weight, e.g. weight per square meter
- B32B 2307/7244: Oxygen barrier
- B32B 2307/732: Dimensional properties
- B32B 2439/40: Closed containers
- B32B 2439/70: Food 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
- B31B: MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER (making wound articles, e.g. wound tubes, B31C; combined making and filling B65B)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

A packaging container comprises a laminated sheet where at least a substrate, a barrier layer and a sealant layer are laminated together in this order, and the laminated sheet has a stiffness of 1.01 [mN·m] or less measured by a Taber stiffness tester method in accordance with JIS-P8125.

## Claims

### Claim 1

A packaging container, comprising:
a laminated sheet where at least a substrate, a barrier layer and a sealant layer are laminated together in this order,
wherein the laminated sheet has a stiffness of 1.01 mN·m or less measured by a Taber stiffness tester method in accordance with JIS-P8125, and
wherein the substrate is a substrate having a basis weight of 60 to 140 g/m2 and a thickness of 120 to 220 μm, and,
the sealant layer is a CPP film having a thickness of 30 μm or more.

### Claim 2 (depends on 1)

The packaging container of claim 1, comprising:
the laminated sheet, wherein the packaging container has a front surface portion and a rear surface portion disposed so that the sealant layers face each other, a bottom surface portion folded between the front surface portion and the rear surface portion from a first end of the front surface portion and the rear surface portion, side sealing portions having two-layered structure in which edge portions of the front surface portion and the rear surface portion in the width direction are overlapped with each other and are sealed, and a bottom surface sealing portion having four-layered structure in which edge portions of the front surface portion and the rear surface portion, and edge portions of the bottom surface portion in the width direction are overlapped with one another and are sealed,
wherein a depth of a bottom folded depth where the bottom surface portion is folded is set to 10 to 40% of a height of the side face part.

### Claim 3 (depends on 2)

The packaging container of claim 2,
wherein a point sealing having a width of 40 to 90% of a sealing width is provided at each boundary portion between the bottom surface sealing portion and the side sealing portion.

### Claim 4 (depends on 1)

The packaging container of claim 1,
wherein a blanked portion is provided at each bottom surface sealing portion at a position of 5 to 50% of the bottom folded depth from the bottom edge of the bottom surface sealing portion.

### Claim 5 (depends on 1)

The packaging container of claim 1,
wherein the substrate comprises a material containing cellulose, or a material containing resin and natural mineral.

### Claim 6 (depends on 1)

The packaging container of claim 1, wherein the CPP film has the thickness of 50.0 μm or more.

### Claim 7 (depends on 1)

The packaging container of claim 1, wherein the CPP film has the thickness of 70.0 μm or more.

### Claim 8 (depends on 1)

The method of claim 1, wherein the CPP film has the thickness of 50.0 μm or more.

### Claim 9 (depends on 1)

The method of claim 1, wherein the CPP film has the thickness of 70.0 μm or more.

### Claim 10

A packaging container produced by a method of producing a packaging container, comprising:
a step of preparing a laminated sheet including a substrate, a barrier layer and a sealant layer laminated together in this order, wherein the laminated sheet is formed in a rectangle having a first direction and a second direction perpendicular to each other, and a front surface portion, a first area and a second area of a bottom surface portion, and a rear surface portion are defined and formed in this order along the first direction;
a step of folding the laminated sheet in half so that the folded sealant layers face each other, and the front surface portion and the rear surface portion, and the first area and the second area of the bottom surface portion are respectively overlapped with each other;
a step of forming a blanked portion at both edges of the first area and the second area in the second direction of the first area and the second area by removing part of the both edges of the first area and the second area with the first area and the second area of the bottom surface portion being overlapped with each other;
a step of folding the first area and the second area inside between the front surface portion and the rear surface portion such that the blanked portions of each of the first area and the second area face each other, and the first area and the second area are overlapped with each other; and,
a step of sealing each sealant layer of the front surface portion and the rear surface portion, each sealant layer of the front surface portion and the first area of the bottom surface portion, each sealant layer of the rear surface portion and the second area of the bottom surface portion, and each sealant layer of the front surface portion and the rear surface portion through each of the blanked portions of the first area and the second area at both end portions of the front surface portion and the rear surface portion in the second direction, wherein the substrate is a substrate having a basis weight of 60 to 140 g/m2 and a thickness of 120 to 220 μm, and,
each sealant layer is a CPP film having a thickness of 30 μm or more.

### Claim 11 (depends on 10)

A packaging container produced by the method of producing a packaging container of claim 10,
further comprising a step of sealing each sealant layer of the front surface portion and the first area of the bottom surface portion, each sealant layer of the front surface portion, and each sealant layer of the rear surface portion and the second area of the bottom surface portion at both end portions of the front surface portion and the rear surface portion in the second direction with the first area and the second area of the bottom surface portion being overlapped with each other.

### Claim 12 (depends on 10)

The packaging container produced by the method of producing a packaging container of claim 10,
further comprising a step of sealing part of the sealant layers of a double-layered region in which the front surface portion and the rear surface portion are overlapped with each other and a quadruple-layered region in which the front surface portion, the rear surface portion, and the first area and the second area of the bottom surface portion are overlapped with one another, at both end portions of the front surface portion and the rear surface portion in the second direction.

### Claim 13 (depends on 10)

The packaging container of claim 10, wherein the CPP film has the thickness of 50.0 μm or more.

### Claim 14 (depends on 10)

The packaging container of claim 10, wherein the CPP film has the thickness of 70.0 μm or more.

### Claim 15

A method of producing a packaging container, comprising the steps of:
a step of preparing a laminated sheet including a substrate, a barrier layer and a sealant layer laminated together in this order, wherein the laminated sheet is formed in a rectangle having a first direction and a second direction perpendicular to each other, and a front surface portion, a first area and a second area of a bottom surface portion, and a rear surface portion are defined and formed in this order along the first direction;
a step of folding the laminated sheet in half so that the folded sealant layers face each other, and the front surface portion and the rear surface portion, and the first area and the second area of the bottom surface portion are respectively overlapped with each other;
a step of forming a blanked portion at both edges of the first area and the second area in the second direction of the first area and the second area by removing part of the both edges of the first area and the second area with the first area and the second area of the bottom surface portion being overlapped with each other;
a step of folding the first area and the second area inside between the front surface portion and the rear surface portion such that the blanked portions of each of the first area and the second area face each other, and the first area and the second area are overlapped with each other; and,
a step of sealing each sealant layer of the front surface portion and the rear surface portion, each sealant layer of the front surface portion and the first area of the bottom surface portion, each sealant layer of the front surface portion and the second area of the bottom surface portion, and each sealant layer of the front surface portion and the rear surface portion through each of the blanked portions of the first area and the second area at both end portions of the front surface portion and the rear surface portion in the second direction, wherein the substrate is a substrate having a basis weight of 60 to 140 g/m2 and a thickness of 120 to 220 μm, and,
each sealant layer is a CPP film having a thickness of 30 μm or more.

### Claim 16 (depends on 15)

The method of producing the packaging container of claim 15,
further comprising a step of sealing each sealant layer of the front surface portion and the first area of the bottom surface portion, each sealant layer of the front surface portion, and each sealant layer of the rear surface portion and the second area of the bottom surface portion at both end portions of the front surface portion and the rear surface portion in the second direction with the first area and the second area of the bottom surface portion being overlapped with each other.

### Claim 17 (depends on 15)

The method of producing the packaging container of claim 15,
further comprising a step of sealing part of the sealant layers of a double-layered region in which the front surface portion and the rear surface portion are overlapped with each other and a quadruple-layered region in which the front surface portion, the rear surface portion, and the first area and the second area of the bottom surface portion are overlapped with one another, at both end portions of the front surface portion and the rear surface portion in the second direction.