Patent ID: 9156972
Filing Date: 2015-10-13
Classification: C08J,C08L,Y10T

Abstract:
1. A retort pouch comprising: a first sheet and an opposing second sheet, each sheet comprising (A) from 90 to 98 percent by weight of a coupled impact propylene copolymer comprising from 3 to 11 percent by weight of units derived from ethylene based on the total weight of the impact propylene copolymer and comprising a propylene homopolymer continuous phase and an elastomeric phase comprising an ethylene-propylene copolymer, and (B) from 2 to 10 percent by weight of a propylene-ethylene copolymer having from 3.5 to 7.0 percent by weight of units derived from ethylene, the blend having a melt flow rate from 0.1 to 2.5 grams/10 minutes as measured in accordance with ASTM D1238 condition L; a barrier layer located between the outer layer and the seal layer, the barrier layer selected from the group consisting of nylon, polyvinyl chloride, ethylene vinyl alcohol, polyethylene, polypropylene, aluminum foil, metallized nylon, and metallized polyester; and a heat seal along a common periphery of the first sheet and the second sheet; wherein the innermost seal layer is bonded directly to the barrier layer by an adhesive layer, and wherein the retort pouch is wrinkle-free post retort and has an average Ra value less than 0.480 (Gausian, 2.5 mm filter), wherein the retort pouch is retorted at 130° C. for 30 minutes.