Process for making a carbon nanotubes / ultra-high molar mass polyethylene composite fibre
CA 2574128 C · Owner: Dsm Ip Assets B.V. · Inventors: Marissen, Roelof; Van Der Werff, Harm; Yu, Tongxi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for making a carbon nanotubes / ultra-high molar mass polyethylene (CNTs/UHPE) composite fibre comprising the steps of a) pre-treating CNTs with an acidic aqueous solution; b) making a composition containing pre-treated CNTs dispersed in a solution of UHPE in a spin solvent; and c) spinning the composition obtained into fibres; wherein step b) comprises making a dispersion of pre-treated CNTs in an alcohol and mixing , this dispersion with a mixture of UHPE and spin solvent. With this process CNTs/UHPE composite fibres showing improved tensile properties are obtained at relatively low CNTs content. A further advantage is that no or hardly any …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 14, 2005 and granted October 9, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.