| 摘要 |
PROBLEM TO BE SOLVED: To provide a molding that excels in rigidity and transparency and is also excellent in heat sealing characteristics.SOLUTION: A molding is obtained by molding a polypropylene system laminated sheet that comprises at least a double-layered structure that uses for a first layer, a propylene-ethylene block copolymer (A) that fulfills the following condition, and uses a composition that combines 0.01-1 pts.wt. of a nucleating agent to 100 pts.wt. of a polypropylene resin (B) of a melting point 145°C or more for a second layer. (A-i) The propylene-ethylene block copolymer is obtained by using a metallocene catalyst, and by polymerizing sequentially in a first process, 30-95 wt.% of propylene ethylene random copolymer component (A1) of 0.3-7 wt.% ethylene content, and in a second process, 70-5 wt.% of the propylene ethylene random copolymer component (A2) that contains 3-20 wt.% or more of the ethylene than the component (A1). (A-ii) The melt flow rate is 0.1-30 g/10 minute. (A-iii) In a temperature-loss tangent (tanδ) curve obtained by a solid viscoelasticity measurement, the tanδ curve has a single peak at 0°C or less. |
