Method for the manufacture of polyolefin film from blends of polyolefins
CA 1314345 C · Owner: Kelly, Peter Yates · Inventors: Kelly, Peter Yates
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the manufacture of film from blends of polyolefins is disclosed. The blend is comprised of a polyethylene and up to 20% by weight of the blend of a polyethylene grafted with 0.5 to 2.0% by weight of an ethylenically unsaturated carboxylic acid or anhydride, especially maleic anhydride. The polyethylene may be a homopolymer of ethylene or a copolymer of ethylene and a C4 - C10 hydrocarbon alpha-olefin, especially so-called linear low density polyethylene. The addition of graft polyethylene results in increased melt strength of the polyethylene, and thus higher production rates, while substantially retaining properties, especially tear strength and optical properties, of the …
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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
- Granted March 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 9, 2010.
- 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.