COMPOSITE FILM, LID MATERIAL, AND LIDDED CONTAINER CONTAINING CONTENT

• Main Authors: SHINSHI SAYURI, ASAMI KEISUKE, TANIGAWA RYOJI, FUCHITA TAIJI
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2023
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; TRANSPORTING

To provide: a composite film that suppresses occurrence of a defect such as tearing and hole residue during peeling to form openings in a lid material that can form an opening at a partially peeled part before being completely unsealed, and achieves peel strength that enables reliable peeling; a lid material formed from the composite film; and a lidded container containing contents.SOLUTION: The composite film forming a lid material is a laminate configured to include a base material layer, an easily peelable resin layer, and a polyester film layer in this order, and include a core layer and a seal layer as the easily peelable resin layer, with one surface being the seal layer placed in contact with the polyester film layer.SELECTED DRAWING: Figure 1 【課題】全開封する前に部分剥離部において開孔を形成できる蓋材において、開孔を形成するための剥離の際に破れや孔残り等の不具合の発生を抑制し、確実な剥離が可能な剥離強度を実現する複合フィルム、当該複合フィルムから形成される蓋材、及び内容物入り蓋付容器を提供する。【解決手段】蓋材を形成する複合フィルムを、基材層、易剥離性樹脂層、及びポリエステルフィルム層がこの順で含まれる構成とし、易剥離性樹脂層として、コア層とシール層とを含む積層体であり、一方の表面がシール層であるものを用い、シール層をポリエステルフィルム層と接するように配置する。【選択図】図１