Non-oriented polyster films for lidding stock with modified heat seal layer
CA 1314124 C · Owner: Reynolds Consumer Products, Inc. · Inventors: Winter, John P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coextruded heat sealable film made with nonoriented polyester and a heat seal layer comprising about 50% to about 80% of a copolyester and about 20% to about 52% of an olefin polymer is disclosed. In one preferred embodiment the polyester base layer includes from about 1% to about 5% of a polyolefin LLDPE being, preferred; and in another preferred embodiment the polyester base layer comprises a resin which in a nonoriented film form has a tensile strength of 7,000 psi or more. The heat sealable film can be laminated with aluminum foil, paper, etc. to form a composite which is heat sealable, useful in pouches and lidding stock. The heat seal layer using about 30% to about 40% LLDPE as 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.