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US 2026/0233502 A1Published application
Packaging bag and packaging multilayer film to be used for producing the packaging bag
AssigneeToyo Seikan Group Holdings, Ltd.
InventorsKenya Majima, Seishi Yoshikawa, Koki Shibata, Atsushi Ebata
Life of this patent
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Abstract
In a packaging bag (10) including multilayer films for packaging (5) including a heat-sealable resin layer (3) on a surface and formed by bonding two of the heat-sealable resin layers (3) of the multilayer films for packaging (5), oriented crystals are present in a seal portion (7) formed by bonding the heat-sealable resin layers (3).
Claims10
A packaging bag, comprising
- multilayer films for packaging including a heat-sealable resin layer on a surface, the packaging bag being formed by bonding two of the heat-sealable resin layers of the multilayer films for packaging, wherein
- oriented crystals are present in a seal portion formed by bonding the heat-sealable resin layers,
- the multilayer films for packaging include a stretched film for reinforcing strength for allowing the oriented crystals to be present in the seal portion, and
- the stretched film for reinforcing strength contains an olefin resin and a reinforcing resin having a melting point higher than a melting point of the olefin resin.
1 more element
Dependencies are inferred from the claim text.