| 摘要 |
<p>PURPOSE: To obtain a hollow molded product which is easy to mold and wherein medicine is not contaminated by fine particles by providing a specific straight- chain ethylene.α-olefin copolymer obtained by copolymerizing ethylene andα-olefin in an internal layer. CONSTITUTION: This hollow molded product preferable as a container for highly pure medicine which is indispensable to manufacture of electronic circuits such as large-sized and integrated LSIs or the like has in its internal layer a straight- chain ethylene.α-olefin copolymer obtained by copolymerizing ethylene andα-olefin having 3 to 12 carbon atoms. As this straight-chain ethylene.α-olefin copolymer, a copolymer wherein a density is 0.850 to 0.945g/cm<3> , a ratio (Mw/Mn) of an weight-average molecular weight (Mw) and a number-average molecular weight (Mn) obtained from GPC(gel permeation chromatography) is 3 or lower, and a ratio of a number of average branches of 30wt.% of a low molecular weight region with respect to that of 30wt.% of a high molecular weight region fractional by GPC is 0.8-1.2 is used.</p> |
