MULTILAYER FILM, MEDICAL FLUID BAGS AND METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR STERILIZATION OF MEDICAL FLUID BAGS

摘要

PROBLEM TO BE SOLVED: To provide a multilayered film which exhibits excellent heat resistance and can keep flexibility and transparency even after high-temperature sterilization and which prevents adhesion to a cutter when forming a peripheral seal area or cutting away unnecessary parts, and to provide medical fluid bags using the film, a method for manufacturing the same, and a method for sterilization of the medical fluid bags.

SOLUTION: The multilayer film comprises the first layer (outer layer) 1 which is made of, e.g., a mixture comprising 55 to 85 wt.% of a linear polyethylene (PE-L) having a DSC melting point of 120 to 125°C and a density of 0.930 to 0.937g/cm3and 15 to 45 wt.% of a propylene homopolymer having a DSC melting point of 160 to 165°C and the second to fifth layers (inner layers) 2 to 5 which are each made of PE-L. The second and fourth layers 2 and 4 have DSC melting points of 120 to 125°C and densities of 0.910 to 0.920g/cm3, while the third layer 3 has a DSC melting point of 120 to 125°C and a density of 0.930 to 0.937g/cm3. Medical fluid bags can be made by using the multilayer film.

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