LAMINATE FILM FOR SEALING IN LIQUID

• Main Author: FUTASE KATSUNORI
• Format: Patent
• Language: English; Japanese
• Published: 18.11.2021
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; 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; DYES; 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; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PACKAGES; PACKAGING ELEMENTS; PACKING; PAINTS; PERFORMING OPERATIONS; POLISHES; STORING; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

To provide a laminate film which can be sealed in liquid regardless of the kind of an object to be packaged which is interposed in a heat-sealing part, such as an object containing a contaminant such as a solid matter, a sealing material or a highly viscous material such as an adhesive.SOLUTION: A laminate film used in sealing in liquid for heat-sealing a squeezing out position while squeezing out a liquid matter remaining between two overlapped laminate films by a pair of heat-sealing rolls and joining the laminate films includes at least a base film layer and a sealant layer. The sealant layer is composed of a highly fluid thermoplastic resin film layer as an outermost layer and a lowly fluid thermoplastic resin film layer laminated inside positioned on the side of the base film layer of the highly fluid thermoplastic resin film layer, the lowly fluid thermoplastic resin film layer has a melting point higher than that of the highly fluid thermoplastic resin film layer, and a melting point difference is 20°C or more.SELECTED DRAWING: Figure 3 【課題】固形物等の夾雑物を含むものや、シーリング材や接着剤等の高粘性材料など、ヒートシール部分に介在することとなる被包装物の種類に関係なく、液中シールすることのできるラミネートフィルムについて提案すること。【解決手段】一対のヒートシールロールによって、重なり合う２枚のラミネートフィルム間に残存している液状物を絞り出しながら該絞り出し位置をヒートシールして気密に接合する液中シールに用いられるラミネートフィルムであって、少なくともベースフィルム層とシーラント層とを具え、該シーラント層は、最外層となる高流動性熱可塑性樹脂フィルム層と、該高流動性熱可塑性樹脂フィルム層の前記ベースフィルム層側に位置する内側に積層された低流動性熱可塑性樹脂フィルム層とからなるものであって、前記低流動性熱可塑性樹脂フィルム層は、前記高流動性熱可塑性樹脂フィルム層よりも高い融点を有し、その融点差が２０℃以上であること。【選択図】図３