# US 12,767,384 B2 · Cushioning material and packaged product

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- Number: US 12,767,384 B2
- Document ID: US12767384B2
- Status: Granted
- Kind: B2
- Application number: 18/466,023
- Filed: 2023-09-13
- Published: 2024-03-21
- Granted: 2026-10-20
- Earliest claimed: 2022-09-15
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Michiko Kawaji; Makoto Furuhata
- Web page: https://patentgrep.com/patent/US12767384B2

## CPC

- B65D 5/5054: {formed by a plurality of layers contacting each other, e.g. multiple layers of corrugated cardboard}
- B32B 7/022: Mechanical properties
- B32B 29/005: {next to another layer of paper or cardboard layer}
- B32B 29/08: Corrugated paper or cardboard
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2553/02: Shock absorbing
- 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

## Abstract

Provided is a cushioning material obtained by stacking a plurality of cushioning sheets, in which the plurality of cushioning sheets include a first cushioning sheet, a second cushioning sheet having a strength stronger than that of the first cushioning sheet, and a third cushioning sheet having a strength stronger than that of the second cushioning sheet.

## Claims

### Claim 1

A cushioning material having a multilayer structure, the cushioning material comprising:
a first layer;
a second layer having a strength stronger than that of the first layer, and
a third layer having a strength stronger than that of the second layer,
the first layer including
a first flat plate portion having a flat plate shape, and
a first support portion attached to the first flat plate portion and having a corrugated shape, the first support portion including a first surface and a second surface, the first surface facing the first flat plate portion, the first surface and the second surface oppositely facing along a first direction with a first thickness defined as a distance between the first surface and the second surface along the first direction,
the second layer including
a second flat plate portion having a flat plate shape, and
a second support portion attached to the second flat plate portion and having a corrugated shape, the second support portion including a third surface and a fourth surface, the third surface facing the second flat plate portion, the third surface and the fourth surface oppositely facing along a second direction with a second thickness defined as a distance between the third surface and the fourth surface along the second direction, the second thickness being thicker than the first thickness, and
the third layer including
a third flat plate portion having a flat plate shape, and
a third support portion attached to the third flat plate portion and having a corrugated shape, the third support portion including a fifth surface and a sixth surface, the fifth surface facing the third flat plate portion, the fifth surface and the sixth surface oppositely facing along a third direction with a third thickness defined as a distance between the fifth surface and the sixth surface along the third direction, the third thickness being thicker than the second thickness,
each of the first layer, the second layer, and the third layer being a single layer,
the multilayer structure being composed of the first layer, the second layer, and the third layer, which are continuously stacked, and
in response to an external force being applied to the cushioning material, the first layer being configured to be deformed first among the first layer, the second layer, and the third layer, and the first layer, the second layer, and the third layer being deformable in an order of the first layer, the second layer, and the third layer.

### Claim 2 (depends on 1)

The cushioning material according to claim 1, wherein
the first layer is stacked between the second layer and the third layer.

### Claim 3 (depends on 1)

The cushioning material according to claim 1, wherein
the second support portion has a higher density than the first support portion, and
the third support portion has a higher density than the second support portion.

### Claim 4

A packaged product comprising:
a packaging box configured by a cushioning material having a multilayer structure; and
contents packed in the packaging box,
the cushioning material including
a first layer,
a second layer having a strength stronger than that of the first layer, and
a third layer having a strength stronger than that of the second layer,
the first layer including
a first flat plate portion having a flat plate shape, and
a first support portion attached to the first flat plate portion and having a corrugated shape, the first support portion including a first surface and a second surface, the first surface facing the first flat plate portion, the first surface and the second surface oppositely facing along a first direction with a first thickness defined as a distance between the first surface and the second surface along the first direction,
the second layer including
a second flat plate portion having a flat plate shape, and
a second support portion attached to the second flat plate portion and having a corrugated shape, the second support portion including a third surface and a fourth surface, the third surface facing the second flat plate portion, the third surface and the fourth surface oppositely facing along a second direction with a second thickness defined as a distance between the third surface and the fourth surface along the second direction, the second thickness being thicker than the first thickness, and
the third layer including
a third flat plate portion having a flat plate shape, and
a third support portion attached to the third flat plate portion and having a corrugated shape, the third support portion including a fifth surface and a sixth surface, the fifth surface facing the third flat plate portion, the fifth surface and the sixth surface oppositely facing along a third direction with a third thickness defined as a distance between the fifth surface and the sixth surface along the third direction, the third thickness being thicker than the second thickness, and
the packaging box being provided such that a cross section of the first layer in the cushioning material is visually recognizable,
each of the first layer, the second layer, and the third layer being a single layer,
the multilayer structure being composed of the first layer, the second layer, and the third layer, which are continuously stacked, and
in response to an external force being applied to the cushioning material, the first layer being configured to be deformed first among the first layer, the second layer, and the third layer, and the first layer, the second layer, and the third layer being deformable in an order of the first layer, the second layer, and the third layer.

### Claim 5

A packaged product comprising:
a packaging box;
contents packed in the packaging box; and
a cushioning material having a multilayer structure that is accommodated in the packaging box and supports the contents inside the packaging box,
the cushioning material including
a first layer,
a second layer having a strength stronger than that of the first layer, and
a third layer having a strength stronger than that of the second layer,
the first layer including
a first flat plate portion having a flat plate shape, and
a first support portion attached to the first flat plate portion and having a corrugated shape, the first support portion including a first surface and a second surface, the first surface facing the first flat plate portion, the first surface and the second surface oppositely facing along a first direction with a first thickness defined as a distance between the first surface and the second surface along the first direction,
the second layer including
a second flat plate portion having a flat plate shape, and
a second support portion attached to the second flat plate portion and having a corrugated shape, the second support portion including a third surface and a fourth surface, the third surface facing the second flat plate portion, the third surface and the fourth surface oppositely facing along a second direction with a second thickness defined as a distance between the third surface and the fourth surface along the second direction, the second thickness being thicker than the first thickness, and
the third layer including
a third flat plate portion having a flat plate shape, and
a third support portion attached to the third flat plate portion and having a corrugated shape, the third support portion including a fifth surface and a sixth surface, the fifth surface facing the third flat plate portion, the fifth surface and the sixth surface oppositely facing along a third direction with a third thickness defined as a distance between the fifth surface and the sixth surface along the third direction, the third thickness being thicker than the second thickness, and
the packaging box being provided with an opening such that a cross section of the cushioning material is visually recognizable,
each of the first layer, the second layer, and the third layer being a single layer,
the multilayer structure being composed of the first layer, the second layer, and the third layer, which are continuously stacked, and
in response to an external force being applied to the cushioning material, the first layer being configured to be deformed first among the first layer, the second layer, and the third layer, and the first layer, the second layer, and the third layer being deformable in an order of the first layer, the second layer, and the third layer.