| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multilayer film having an excellent elongation recovery rate, excellent elongation recovery force, excellent tear strength, and excellent impact strength. <P>SOLUTION: This tube-shaped ethylene resin multilayer film includes a core layer containing 50-100 wt% of ethylene resin (A) fulfilling requirements (a1), (a2) and (a3) and 0-50 wt% of ethylene resin (B) different from the ethylene resin (A) and fulfilling requirements (b1) and (b2); and two surface layers containing an ethylene-α-olefin copolymer (C) fulfilling requirements (c1), (c2) and (c3). (a1): Less than 0.1 per 1,000 carbon atoms of N<SB POS="POST">C5</SB>. (a2): At least 40 kJ/mol of Ea. (a3): Density of 900-921 kg/m<SP POS="POST">3</SP>. (b1): Vicat softening temperature of 100 °C or lower. (b2): 0.1-7g/10 mins of MFR. (c1): Less than 40 kJ/mol of Ea. (c2): 0.1-2g/10 mins of MFR. (c3): Density of 900-925 kg/m<SP POS="POST">3</SP>. <P>COPYRIGHT: (C)2013,JPO&INPIT |
