NON-STRETCHED MULTILAYER FILM

• Main Authors: KAWAMURA SHIGEO, TAJIMA TOMOKI, KURAMOTO NAOHIKO, KURIMOTO MASAFUMI, OGAWA YUICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 11.11.2021
• 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 non-stretched multilayer film which is a non-stretched multilayer film excellent in suitability for high-speed automatic bag-making, imparts to a package formed from the film, both anti-slippage and easiness of introduction of contents, and is also excellent in transparency and flexibility.SOLUTION: A non-stretched multilayer film comprises an outermost layer (A), at least one intermediate layer (B), and an outermost layer (C) as a seal layer which are laminated in this order. The non-stretched multilayer film is such that: the outermost layer (A) and the outermost layer (C) are layers containing a polypropylene resin as the main components; the intermediate layer (B) is a layer containing 100 pts.mass of a polyethylene resin, and 5-35 pts.mass of a polypropylene resin; a dynamic friction coefficient A of the surfaces of the outermost layer (A) is 0.60-1.00; a dynamic friction coefficient C of the surfaces of the outermost layer (C) is 0.30-1.00; and a difference between the dynamic friction coefficient A and the dynamic friction coefficient C (the dynamic friction coefficient A-the dynamic friction coefficient C) is 0±0.3.SELECTED DRAWING: None 【課題】高速自動製袋適性が良好な無延伸多層フィルムであって、該フィルムから形成された包装体が難滑性と内容物の導入のし易さを兼ね備え、加えて透明性及び柔軟性にも優れる無延伸多層フィルムを提供することを目的とする。【解決手段】最外層（Ａ）、少なくとも１層の中間層（Ｂ）、及びシール層である最外層（Ｃ）がこの順に積層された無延伸多層フィルムであって、前記最外層（Ａ）及び最外層（Ｃ）は、ポリプロピレン系樹脂を主成分として含む層であり、前記中間層（Ｂ）は、ポリエチレン系樹脂１００質量部と、ポリプロピレン系樹脂５〜３５質量部とを含む層であり、前記最外層（Ａ）の表面同士の動摩擦係数Ａが０．６０〜１．００であり、前記最外層（Ｃ）の表面同士の動摩擦係数Ｃが０．３０〜１．００であり、前記動摩擦係数Ａと動摩擦係数Ｃとの差（動摩擦係数Ａ−動摩擦係数Ｃ）が、０±０．３である、無延伸多層フィルム。【選択図】なし