# US 11,305,928 B2 · Packaging bag > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,305,928 B2 - Document ID: US11305928B2 - Status: Granted - Kind: B2 - Application number: 16/015,304 - Filed: 2018-06-22 - Published: 2018-10-18 - Granted: 2022-04-19 - Earliest claimed: 2015-12-24 - Assignees: Toppan Printing Co., Ltd. - Applicants: Toppan Printing Co., Ltd. - Inventors: Misao Nishigaki; Eriko Nagata - Web page: https://patentgrep.com/patent/US11305928B2 ## CPC - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B65D 81/022: {Containers made of shock-absorbing material (B65D81/03 takes precedence; for thermal insulating purposes B65D81/3813)} - B32B 3/02: characterised by features of form at particular places, e.g. in edge regions {(non-uniform thickness B32B3/263)} - B32B 3/04: characterised by {at least one} layer folded at the edge, e.g. over another layer {; characterised by at least one layer enveloping or enclosing a material} - B32B 3/28: characterised by a layer comprising a deformed thin sheet {, i.e. the layer having its entire thickness deformed out of the plane}, e.g. corrugated, crumpled (B32B29/08 takes precedence) - B32B 5/18: characterised by features of a layer {of} foamed material - B32B 7/022: Mechanical properties - B32B 7/04: Interconnection of layers - B32B 27/065: {of foam} - B32B 27/08: of synthetic resin - B32B 27/20: using fillers, pigments, thixotroping agents - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B32B 27/36: comprising polyesters - B65D 75/5805: {for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness} - B65D 75/5816: {for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion} - B65D 81/027: {double-walled (for thermal insulating purposes B65D81/3818, B65D81/383)} - B65D 81/03: Wrappers or envelopes with shock-absorbing properties, e.g. bubble films {(for thermal insulating purposes B65D81/3888)} - B32B 2250/03: 3 layers - B32B 2250/04: 4 layers - B32B 2250/24: All layers being polymeric - B32B 2266/025: Polyolefin - B32B 2307/4026: within the layer by addition of a colorant, e.g. pigments, dyes - B32B 2307/518: bi-axially - B32B 2307/546: Flexural strength; Flexion stiffness - B32B 2307/558: Impact strength, toughness - B32B 2307/7265: Non-permeable - B32B 2307/732: Dimensional properties - B32B 2307/744: Non-slip, anti-slip - B32B 2439/46: Bags - B32B 2553/00: Packaging equipment or accessories not otherwise provided for - 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 ## Abstract A packaging bag is a packaging bag made of a laminate formed in a bag shape which is in a rectangular shape in plan view, the laminate being composed of a sheet-shaped substrate made of a resin, a cushioning material made of a foamed resin sheet laminated on an inner side relative to the substrate, and a sealant layer laminated on an inner side relative to the cushioning material. The packaging bag includes a seal section in which the sealant layers are sealed to each other on one end edge in a flow direction (MD direction) of the foamed resin sheet, the seal section extending in a direction perpendicular to the flow direction of the foamed resin sheet, wherein a notch is formed in the seal section to be oriented to the other end edge in the flow direction of the foamed resin sheet. ## Claims ### Claim 1 A packaging bag, comprising: a laminate having a rectangular shape in plan view, the laminate being composed of a sheet-shaped substrate made of a resin, a cushioning material made of a foamed resin sheet laminated on an inner side relative to the substrate, and a sealant layer laminated on an inner side relative to the cushioning material, the laminate includes in a first direction, which is a direction perpendicular to a flow direction of the foamed resin, a first edge and a second edge, which is opposite to the first edge in the first direction, the sealant layer comprises in the first direction a first edge at the first edge of the laminate, a second edge at the second edge of the laminate and a non-edge portion between the first edge and the second edge of the sealant layer in the first direction; the laminate is folded so that the non-edge portion of the sealant layer faces an inner space of the packaging bag and so that the first edge and the second edge of the laminate form a first seal section extending in the flow direction of the foamed resin sheet, the first seal section is at a center of the packaging bag in the first direction; wherein in the first seal section, the first edge and the second edge of the sealant layer are abutted to each other and thermally sealed to each other in the flow direction, wherein the sealant layer further comprises a third edge, which is perpendicular to the first edge and the second edge, the third edge comprises a first edge portion and a second edge portion, which are sealed to each other to form a second seal portion of the laminate, the second seal portion being perpendicular to the first seal portion; wherein the second seal section comprises a Y notch oriented in the flow direction of the foamed resin sheet and wherein an expansion ratio of the foamed resin sheet is in a range of 18 to 32 times. ### Claim 2 (depends on 1) The packaging bag of claim 1, wherein the sealant layer includes a colored pigment. ### Claim 3 (depends on 2) The packaging bag of claim 2, wherein the sealant layer includes 1 to 10 wt. % of the colored pigment. ### Claim 4 (depends on 1) The packaging bag of claim 1, wherein the sealant layer is substantially made of LLDPE. ### Claim 5 (depends on 1) The packaging bag of claim 1, wherein the cushioning material has a thickness in a range of 1 to 5 mm. ### Claim 6 (depends on 5) The packaging material of claim 5, wherein the cushioning material is a foam polyethylene or a foam polypropylene.