DLA Piper LLP (US)
Polypropylene film and laminated material thereof
A polypropylene film comprising 70-90 wt. % polymer (a), 2-10 wt. % polymer (b), 2-10 wt. % polymer (c) and 3-20 wt. % polymer (d) and having a haze of 8-30% (wherein the polymer (a) is a block copolymer prepared by producing a polymer part (component a1) by polymerizing in a first step monomers composed mainly of propylene in the absence of an inert solvent and producing an ethylene/propylene copolymer part (component a2) in a second step by polymerization subsequently carried out in a gas phase; the polymer (b) is an ethylene-based polymer having a density of 0.91-0.97 g/cm3 and a melt flow rate of 5-30 g/10 min; the polymer (c) is an ethylene/α-olefin random copolymer having a density of 0.86-0.90 g/cm3 and a melt flow rate of 0.3-5 g/10 min; and the polymer (d) comprises two or more propylene-based polymers different in molecular weight from each other).
Toray Advanced Film Co., Ltd. Sumitomo Chemical Company Limited
C B C B C Y Y B B C C C Y Y C B C C Y Y B C C B C B C C B C
C09J B32B C08F B32B C08L Y10T Y10T B32B B32B C08L C08F C08L Y10T Y10T C08J B32B C08L C08J Y10T Y10T B32B C08L C08L B32B C08L B32B C08L C08L B32B C08L
inventional additional inventional additional inventional additional additional additional additional additional inventional additional additional additional inventional inventional additional additional additional additional inventional inventional additional additional additional inventional additional additional inventional inventional
Masanori Yoichi Kouji Hiroshi
Takeuchi Matsuura Kataoka Nozawa