Thermoformable laminate
AssigneeW. R. Grace & Co., Cryovac Div.
InventorsGeorge D. Wofford, Jack L. Shriver, Jr.
Life of this patent
Estimating the term…
Abstract
A thermoformable polymeric laminate with good optical properties, extended shelf life, and memory characteristics comprises a core layer comprising an oxygen barrier material; a polyamide layer disposed on each surface respectively of the core layer, the polyamide having controlled crystallinity; a sealant layer; an outer layer comprising a moisture barrier material; and an intermediate layer disposed between the polyamide layer and each of the sealant layer and outer layer respectively, and comprising an anhydride grafted polyolefin.
Claims8
A thermoformable polymeric laminate comprising:
- (a) a core layer comprising an oxygen barrier material;
- (b) a polyamide layer disposed on each surface respectively of the core layer, the polyamide including a nucleating agent;
- (c) an outer sealant layer;
- (d) a second outer layer comprising a moisture barrier material;
- and
- (e) an intermediate layer disposed between the polyamide layer and each of the sealant layer and second outer layer respectively, and comprising an anhydide grafted polyolefin.
The sealant layer according to claim 5 further comprising a small amount of an antiblock agent.
Dependencies are inferred from the claim text.