| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a medical vessel made of a polyethylene having excellent hygienic property and flexibility without losing transparency even after subjected to a sterilization and further without inducing wrinkle or deformation, and to obtain the polyethylene for the medical vessel. SOLUTION: This polyethylene is a copolymer of ethylene and a 3-12Cα- olefin, and has 0.915-0.940g/cm<3> density, 0.1-10.0g/10min melt flow rate MFR (g/10min)} at 190 deg.C under 2.16kg load, and in which the weight ratio of a decane-soluble component fraction (W) and density (d) at a room temperature satisfy the formula: W<80×exp -100(d-0.88)}+0.1, and a flow index FI (sec<-1> )} defined by shearing rate when shearing stress of a molten polymer at 190 deg.C reaches 2.4×10<6> dyne/cm<2> and the MFR satisfy: FI>75×MFR, and a melt tension (MT (g)} at 190 deg.C and the MFR satisfy: 5.5×MFR<-0.65> >MT >2.2×MFR<-0.84> .</p> |
