BARRIER LAMINATE, PACKAGING PRODUCT, AND MANUFACTURING METHOD OF BARRIER LAMINATE

• Main Author: YOKOKAWA YUKA
• Format: Patent
• Language: English; Japanese
• Published: 23.06.2022
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; 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; DIFFUSION TREATMENT OF METALLIC MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING

To provide a barrier laminate excellent in adhesion of a barrier coat layer and an acid modified polyolefin layer.SOLUTION: A barrier laminate includes a paper substrate layer, a barrier layer, and a sealant layer in this order, and further includes an acid modified polyolefin layer between the paper substrate layer and the barrier layer or between the barrier layer and the sealant layer. In a barrier film, the barrier layer includes a base material film, a first inorganic oxide vapor-deposited layer, and a barrier coat layer in this order. The barrier coat layer is a cured film of a hydrolyzed product of metalalkoxide and a water-soluble polymer. When a surface of the barrier coat layer is measured by X-ray photoelectron spectroscopy (XPS), a ratio (M/C) of metal atoms (M) and carbon atoms (C) is 1.35 or less. The barrier coat layer has a thickness of 155 nm or more. The acid modified polyolefin layer abuts on the barrier coat layer.SELECTED DRAWING: Figure 1 【課題】バリアコート層と、酸変性ポリオレフィン層との密着性に優れるバリア積層体の提供。【解決手段】本発明は、紙基材層と、バリア層と、シーラント層とをこの順に備え、且つ、前記紙基材層と前記バリア層との間、及び前記バリア層と前記シーラント層との間のいずれか一方の間に酸変性ポリオレフィン層を備える、バリア積層体であって、前記バリア層が、基材フィルムと、第１無機酸化物蒸着層と、バリアコート層とをこの順に備える、バリアフィルムであり、前記バリアコート層が、金属アルコキシドの加水分解生成物と水溶性高分子との硬化膜であり、前記バリアコート層の表面をＸ線光電子分光法（ＸＰＳ）により測定したときに、金属原子（Ｍ）と炭素原子（Ｃ）との比（Ｍ／Ｃ）が、１．３５以下であり、前記バリアコート層の厚さが、１５５ｎｍ以上であり、前記酸変性ポリオレフィン層は、前記バリアコート層と接する、バリア積層体である。【選択図】図１