PACKAGING LAYERED-BODY

• Main Authors: YOSHIKAWA, Seishi, EBATA, Atsushi, MAJIMA, Kenya, SHIBATA, Kouki
• Format: Patent
• Language: English; French; Japanese
• Published: 17.03.2022
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING

A packaging layered-body 10 has a structure obtained by stacking a base film 1 and a heat seal film 5 with an adhesive layer 3 sandwiched therebetween, and is characterized in that: the base film 1 is a stretched polypropylene film; the heat seal film 5 is a propylene-based cast film; and in said propylene-based cast film, the loss tangent (tan δ) at 5°C in a dynamic viscoelasticity test measurement exceeds 0.0594 and the storage elastic modulus (E') at 110°C exceeds 1 MPa. L'invention concerne un corps stratifié d'emballage (10) qui présente une structure obtenue par empilement d'un film de base (1) et d'un film de thermoscellage (5) avec une couche adhésive (3) prise en sandwich entre eux, et qui est caractérisé en ce que : le film de base (1) est un film de polypropylène étiré ; le film de thermoscellage (5) est un film coulé à base de propylène ; et dans ledit film coulé à base de propylène, la tangente de perte (tan δ) à 5 °C dans une mesure de test de viscoélasticité dynamique dépasse 0,0594 et le module d'élasticité de stockage (E') à 110 °C dépasse 1 MPa. 基材フィルム１とヒートシールフィルム５とが接着剤層３を間に挟んで積層された構造の包装用積層体１０において、基材フィルム１が延伸ポリプロピレンフィルムであり、ヒートシールフィルム５がプロピレン系キャストフィルムであり、このプロピレン系キャストフィルムは、動的粘弾性試験測定における５℃での損失正接（ｔａｎδ）が０．０５９４を超え且つ１１０℃での貯蔵弾性率（Ｅ'）が１ＭＰａを超えていることを特徴とする。