The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 2010
Filed:
Mar. 31, 2005
Mats Bäckman, Göteborg, SE;
May-lis Andersson, Stillingsön, SE;
Carl-gustaf Ek, Västra Frölunda, SE;
Kenneth Lund, Uddevalla, SE;
Markku Vahteri, Porvoo, FI;
Mats Bäckman, Göteborg, SE;
May-Lis Andersson, Stillingsön, SE;
Carl-Gustaf Ek, Västra Frölunda, SE;
Kenneth Lund, Uddevalla, SE;
Markku Vahteri, Porvoo, FI;
Borealis Technology Oy, Porvoo, FI;
Abstract
A pressureless pipe and polymer composition for making such a pipe as well as the use of the polymer composition for pressureless pipes and supplementary parts, are disclosed. The polymer composition is characterized in that the polymer comprises a multimodal ethylene polymer including a copolymer of ethylene and a C-C&agr; -olefin comonomer; the ethylene polymer has a total density of 953-958 kg/mand a MFRof 0.2-2.0 g/10 min; the ethylene polymer has a modulus of elasticity, determined according to ISO 178 of 1300-1700 MPa; the ethylene polymer has a resistance to slow crack growth, determined according to ASTM F 1473 of more than 1.5 hrs.