Polyamide release film for sheet molding compound
CA 1162012 A · Owner: Sacks, William · Inventors: Bollen, P. Stuart; Degrassi, Alfieri; Sacks, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a polyamide film of low crystallinity suitable for use in the manufacture of sheet molding compound (SMC). The sheet is produced from a blend comprising a polyamide selected from the group consisting of polyepsiloncaprolactam, polyhexamethylene adipamide or mixtures thereof, and about 10 to 30 wt.% based on the total weight of said blend of a polyolefin, compound, or copolymer thereof such as ethylene-vinyl, acetate copolymer. The film has d tear strength of at least about 400 grams in the longitudinal direction is measured by ASTM D-1004-66.
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
- Granted February 14, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 14, 2001.
- 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.