BARRIER THERMOPLASTIC RESIN MOLDED BODY AND PACKAGING MATERIAL USING THE SAME

• Main Authors: FUJII ASAKO, ASAMA HIDEO, SAKIYAMA TETSUZO, KONUMA KENTA
• Format: Patent
• Language: English; Japanese
• Published: 25.11.2022
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; 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; GENERAL PROCESSES OF COMPOUNDING; HANDLING THIN OR FILAMENTARY MATERIAL; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

To provide a thermoplastic resin molded body satisfying both of oxygen barrier properties and water vapor barrier properties.SOLUTION: The is provided a resin molded body which contains an ethylene-vinyl alcohol copolymer (EVOH) as a dispersion phase in a base phase containing at least a polyolefin-based thermoplastic resin, wherein the dispersion phase is formed in a flat shape in the thickness direction of the resin molded body and is arranged so as to overlap in the molding direction and in the molding width direction and an average value of dave. of a distance d in the thickness direction between a plurality of the dispersion phases and an average value Save. of an area S of a dispersion unit consisting of the base phase and the dispersion phase in an arbitrary thick cross-section in the molding direction and in the width direction have a relationship satisfying the expression: dave./(Save.^0.5)≤0.1.SELECTED DRAWING: Figure 1 【課題】酸素バリア性、および水蒸気バリア性を両立する熱可塑性樹脂成形体を提供する。【解決手段】樹脂成形体は、少なくともポリオレフィン系熱可塑性樹脂を含むベース相中に、分散相としてエチレン-ビニルアルコール共重合体（ＥＶＯＨ）を含む樹脂成形体であって、前記分散相が、前記樹脂成形体の厚み方向に対して扁平状に形成され、成形方向および成形幅方向に重なりをもって配置されており、成形方向及び幅方向の任意の厚み断面における、複数の前記分散相間の厚み方向距離ｄの平均値ｄave.と、前記ベース相及び前記分散相からなる分散ユニットの面積Ｓの平均値Ｓave.とが、ｄave./（Ｓave.＾０．５）≦０．１を満たす関係にある。【選択図】図１