| 摘要 |
<p>PURPOSE: To give heat resistance and oil resistance to a laminated body by a structure wherein the laminated body is made respectively of a specified sealing layer, an adjacent layer, an intermediate layer and a base material layer from inside in the order named under the condition that the melt index of the sealing layer is larger by a specified value than that of the intermediate layer and the ply separation strength between the sealing layer and the adjacent layer is weaker than that between the adjacent layer and the intermediate layer and is of a specified separation strength value. CONSTITUTION: This laminated body consists from inside of at least four of more layers or a polypropylene sealing layer having the melting point of 160 deg.C or higher as the first layer, an adjacent layer made of a mixture of 20-90wt.% of polypropylene and 80-10wt.% of 4-methylpentene-1 as the second layer, an intermediate layer made of polypropylene having the melting point of 160 deg.C or higher and the melt index of 0.5-30 as the third layer and polypropylene base material layer having the melting point of 160 deg.C or higher and the melt index of 0.01-4 as the outermost layers. The melt index of the sealing layer is 1.1 or more times as high as that of the intermediate layer and the ply separation strength between the sealing layer and the adjacent layer is set to be weaker than that between the adjacent layer and the intermediate layer and the separation strength is set to be 0.2-2.5kg/15mm under the pulling speed of 300mm/min.</p> |
