| 摘要 |
<p>A laminate characterized by consisting of at least 4 layers and having (A) a seal layer which is a polypropylene having a melting point of at least 160 DEG C as the first layer which is the innermost layer, (B) an adjacent layer consisting of a mixture of 20 to 90% by weight of a polypropylene and 80 to 10% by weight of a 4-methylpentene-1 resin as the second layer, (C) an intermediate layer consisting of a polypropylene having a melting point of at least 160 DEG C and a melt index of 0.5 to 30 as the third layer and (D) a substrate layer consisting of a polypropylene having a melting point of at least 160 DEG C and a melt index of 0.01 to 4 as the outermost layer, wherein the melt index of the seal layer (A) is at least 1.1 times the melt index of the intermediate layer (C), the melt index of the intermediate layer (C) is greater than the melt index of the substrate layer (D), the interlaminar peel strength between (A) and (B) is weaker than the interlaminar peel strength between (B) and (C), and the interlaminar peel strength between (A) and (B) is 0.2 to 2.5 kg/15 mm (drawing speed: 300 mm/min).</p> |
