24/06/2005 - Controller General of Patents, Designs, and Trade Marks

(21) Application No.IN/PCT/2002/00196/DEL A (22) Date of Application: 18/02/2002
(54) Title of the invention: “PROCESS FOR THE PREPARATION OF AT LEAST 2L
VOLUME POLYETHYLENE CONTAINER”.
(51) International Classification 7 :
B 29C 49/00
(30) Priority Data :
(31) Document No.:9919718.8 (32)
Date :19/08/1999.
(33) Name of convention country :
UK
(066) Filed U/s 5(2) : NIL
(61) Patent of addition to application
No. : NA
(62) Filed on : NA
(63) Divisional to Application No.
:NIL
(64) Filed on : NA
(71) Name of the applicant:
BOREALIS TECHNOLOGY OY,
Address of the Applicant:
FIN-06101 Porvo, FINLAND.
(72) Name of the Inventor:
NILSEN, JORUNN
EGGEN, SVEIN
THORN, LARS
BAANN, HEGE VALE
(57) Abstract:
A process for the preparation of at least 2L volume polyethylene container which process
comprises blow moulding a bimodal HDPE, wherein said HDPE contains an ethylene
homopolymer and an ethylene copolymer, said bimodal HDPE having the following
characteristics:
a density of 940 to 970kg/m 3
a weight average molecular weight of 200000to 450000D;
a number average molecular weight of 6000to 20000D;
a molecular weight distribution of 15 to 55;
MFR21 of 2 to 12g/10min;
Tensile modulus at least 900 mPa ;and
A comonomer content of 0.5 to 10 wt%.
18095