Process for preparing photopolymer flexographic element with melt extrusioncoated elastomeric surface layer
CA 1278663 C · Owner: Min, Joon Hong · Inventors: Min, Joon Hong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for preparing a flexographic photopolymer element by (a) passing into the nip of a calender a photopolymer composition mass comprising elastomeric binder, ethylenically unsaturated compound and photoinitiator and (b) calendering the photopolymer composition between a support and a multilayer cover element consisting essentially of a flexible cover film, optionally a flexible polymeric film e.g. a, polyamide, and a layer of elastomeric composition which is photosensitive or becomes photosensitive during or after calendering. At least the layer of elastomeric composition of the multilayer cover element is prepared by melt extrusion wherein mixing in an extruder is at 100 to 300°C. 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 January 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2008.
- 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.