High molecular weight polyethylene
AssigneeTeijin Aramid B.V.
InventorsSanjay Rastogi, Sara Ronca, Giuseppe Forte, Hendrik Jacob Tjaden
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Abstract
The present invention pertains to a polyethylene polymer characterized by the following properties: A number average molecular weight Mn of at least 2.0*105 g/mol, a weight average molecular weight of at least 2.0*106 g/mol, a Mw/Mn ratio of above 6, and a strain hardening slope of below 0.10 N/mm at 135° C. It has been found that a polymer with these properties have be converted through solid state processing into films and fibers with good properties. A solid state processing process, films and fibers, and their use are also claimed.
Claims19
A polyethylene film or fiber comprising a polyethylene polymer, wherein
- the film or fiber have a tensile strength of at least 1.0 GPa, a tensile modulus of at least 40 GPa, and a tensile energy-to-break of at least 15 J/g, and
- the polyethylene polymer has a number average molecular weight Mn of at least 2.0*105 g/mol, a weight average molecular weight Mw of at least 2.0*106 g/mol, a Mw/Mn ratio of at least 10, and a strain hardening slope of below 0.10 N/mm at 135° C.
Dependencies are inferred from the claim text.