FILM FOR PACKING MATERIAL, PACKING MATERIAL AND PACKAGE

• Main Author: SAKIYAMA TETSUZO
• Format: Patent
• Language: English; Japanese
• Published: 30.08.2018
• 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

PROBLEM TO BE SOLVED: To provide a film for packing material with good property of low temperature heat seal while having good slippage and blocking resistance during processing without addition of anti-blocking agent or lubricant, and a packing material using the film for packing material and a package.SOLUTION: A film for packing material 5 has a sealant film 3 (the first layer 3) with thermoplastic resin as main resin, and a first uneven shape 1 formed all over the surface of the sealant film 3 and a second uneven shape 2, formed on the first uneven shape 1, whose average roughness is smaller than the first uneven shape 1. The surface of said sealant film 3 has an arithmetic average roughness Ra between 0.5 μm and 2.0 μm and its ten-point average roughness Rz is between 4.0 μm and 12.0 μm.SELECTED DRAWING: Figure 1 【課題】アンチブロッキング剤や滑剤を入れることなく、加工工程での良好な滑り性、耐ブロッキング性を有するとともに、低温ヒートシール性が良好である包装材用フィルム、および包装材用フィルムを用いた包装材、包装体を提供する。【解決手段】包装材用フィルム５は、熱可塑性樹脂を主樹脂としたシーラントフィルム３（第一層３）を有し、シーラントフィルム３の表面全面に形成された第１の凹凸形状１と、第１の凹凸形状１の上に形成され且つ第１の凹凸形状１よりも平均粗さが小さな第２の凹凸形状２と、を備え、前記シーラントフィルム３の表面は、算術平均粗さＲａが０．５μｍ以上２．０μｍ以下であり、十点平均粗さＲｚが４．０μｍ以上１２．０μｍ以下である。【選択図】図１