Title of Invention

POLYMER FILMS AND A PROCESS FOR THE PRODUCTION THEREOF

Abstract 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.
Full Text

Documents:


Patent Number 203218
Indian Patent Application Number IN/PCT/2000/00190/KOL
PG Journal Number 10/2007
Publication Date 09-Mar-2007
Grant Date 09-Mar-2007
Date of Filing 03-Aug-2000
Name of Patentee BOREALIS POLYMERS OY
Applicant Address P.O.BOX 330,FIN-06101,PORVOO
Inventors:
# Inventor's Name Inventor's Address
1 NUMMILA-PAKARINEN AULI ROVIOVUORENKATU 12 FIN-06100 PORVOO
2 MYHRE OLE JAN SMEDKASVEIJEN 46 N-3919 PORSGUNN
3 JANSEN BJARNE MORADIA 65, BAIRRO DOS 350 FOGO SP-7500 SANTO ANDRE PORTUGAL
PCT International Classification Number C 08F 10/02
PCT International Application Number PCT/FI99/00101
PCT International Filing date 1999-02-10
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 980308 1998-02-10 Finland