| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a packaging material which includes a base material layer, an intermediate layer and a sealant layer and is excellent in pressure-resistant strength, heat-sealing strength and a foreign matter heat-sealing property and enables high-speed filling over a wide sealing temperature range from low temperature to high temperature, and to provide a liquid packaging bag using the packaging material. <P>SOLUTION: The packaging material includes the base material layer, the intermediate layer and the sealant layer, wherein an ethylene-α-olefin copolymer satisfying following conditions (a) to (c) is used as the intermediate layer; (a) density is 0.860 to 0.970 g/cm<SP POS="POST">3</SP>when measured based on JISK6992-2:1997 appendix (23°C), (b) a melt flow rate is 0.5 to 100g/10 minutes when measured based on JISK6992-2:1997 appendix (190°C and 21.18 N-load), (c) a ratio of viscosity η(Pa S) at a shear rate 60(sec<SP POS="POST">-1</SP>) to viscosity η(Pa S) at a shear rate 1,200(sec<SP POS="POST">-1</SP>) (η<SB POS="POST">60</SB>/η<SB POS="POST">1200</SB>) is within a range between 3.5 and 7.0 when measured by a capillograph at 190°C. <P>COPYRIGHT: (C)2012,JPO&INPIT |
