POLYMER FILMS AND A PROCESS FOR THE PRODUCTION THEREOF
摘要
The present invention concerns a polyethylene composition particularly suitable for film blowing. The invention also concerns a process for the production thereof. The composition comprises a low molecular weight portion having a density of more than 960 Kg/m<3> and a high molecular weight portion. The polyethylene composition has a density of about 925-940 Kg/m<3> and a melt flow rate in the range of MFR21 from 5 to 40 g/10 min. A polyethylene film blown from the polyethylene composition exhibits a tensile strength at yield in transverse direction at least 15 MPa, a 1 % secant modulus in machine direction at least 300 MPa and in transverse direction at least 400 MPa, and a dart drop of at least 5 g/ mu m.
申请公布号
WO9941310(A1)
申请公布日期
1999.08.19
申请号
WO1999FI00101
申请日期
1999.02.10
申请人
BOREALIS POLYMERS OY;NUMMILA-PAKARINEN, AULI;MYHRE, OLE, JAN;JANSEN, BJARNE
发明人
NUMMILA-PAKARINEN, AULI;MYHRE, OLE, JAN;JANSEN, BJARNE