Resin composition for producing a film and method for producing a film by using the same
CA 2044271 C · Owner: Mitsui Chemicals, Incorporated · Inventors: Matsunaga, Takashi; Nishimura, Toshihiro; Inoue, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A resin composition for producing a film is provided. The composition comprises (A) a high-density polyethylene having predetermined melt flow rate, density and melt tension, (B) a propylene-based polymer having predetermined melt flow rate, (C) talc, (D) CaO and/or MgO and (E) a, surface active agent. The resin compositions is readily formable into a film having excellent strength and water resistance as well as paper-like texture and rigidity. A method for producing a film by blown-film extrusion from such a resin composition is also provided. In this method both ratio of diameter of the resulting bubble to minimum diameter of the bubble and ratio of length in machine direction 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
- Filed November 15, 1990 and granted September 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2012.
- 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
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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.