LAMINATE AND PACKAGING MATERIAL

• Main Authors: MATSUHISA KENJI, EJIMA YUKI, SHIOKAWA SHUNICHI
• Format: Patent
• Language: English; Japanese
• Published: 04.10.2023
• 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 laminate having excellent recyclability and heat-sealing properties.SOLUTION: There is provided a laminate obtained by laminating at least a base material layer, a first adhesive layer, an intermediate layer, a second adhesive layer and a sealant layer in this order, wherein a protective layer is provided on the outermost surface side of the base material layer, the protective layer is composed of a thermosetting resin, the base material layer, the intermediate layer and the sealant layer are composed of a polyethylene resin, the probe drop temperature on the surface of the base material layer is 180°C or more and 220°C or less, the probe drop temperature on the surface of the intermediate layer is 180°C or less and the ratio of polyethylene in the laminate is 90 mass% or more.SELECTED DRAWING: Figure 1 【課題】リサイクル適性に優れ、且つ、ヒートシール性に優れた積層体を提供すること。【解決手段】少なくとも、基材層と第一の接着剤層と中間層と第二の接着層とシーラント層とがこの順に積層された積層体において、前記基材層の最外面側に保護層が設けられ、前記保護層は、熱硬化型樹脂からなり、前記基材層と中間層とシーラント層がポリエチレン樹脂からなり、前記基材層は、基材層表面の探針降下温度が１８０℃以上２２０℃以下であり、前記中間層は、中間層表面の探針降下温度が１８０℃以下であり、前記積層体に占めるポリエチレンの割合は９０質量％以上であることを特徴とする積層体である。【選択図】図１