Patent ID: 8460771

Claim:
A retortable container system, comprising; a polymeric container body having a base and sidewalls connected to the base forming a receptacle area, the container further having an opening; a polymeric closure adapted to seal the opening in the container and having a top portion with upper and lower surfaces; a flexible retort liner in the form of a layer, connected to the lower surface of the top portion of the closure and adapted to form a seal around the container opening, wherein the retort liner has a hardness from Shore A 50 to Shore A 80 according to ASTM D-2240, the retort liner comprising: (a) at least two styrenic block copolymers, including a first styrenic block copolymer having a melt viscosity greater than or equal to 60,000 Pa·s at a shear rate of 4.6 1/s at 230° C. and a second styrenic block copolymer having a melt viscosity less than the first styrenic block copolymer, wherein the at least two styrenic block copolymers each have at least one hard polymer block derived from at least two aromatic vinyl compound units, and at least one soft polymer block, wherein the soft polymer block includes at least one repeat unit derived from one or more of an olefin monomer and a diene monomer; a softener; one or more polyolefin (co)polymers; two or more polyolefin (co)polymers in a total amount of from about 35 to about 55 parts based on 100 total parts by weight of the styrenic block copolymer, wherein the first polyolefin (co)polymer has a melt index greater than 8 grams of polymer per 10 minutes measured according to ASTM D1238, and wherein the second polyolefin (co)polymer has a melt index from about 0.4 to 8 grams of polymer per 10 minutes measured according to ASTM D1238; and a softener.