| 主权项 |
1. A package comprising
a container formed to include an interior product-storage region and a brim arranged to surround an opening that opens into the interior product-storage region and a multilayer sheet including a sealant layer mated with the brim of the container to close the opening that opens into the interior product-storage region formed in the container, a skin layer, an adhesive layer interposed between and arranged to interconnect the sealant layer and the skin layer, the sealant layer including a removable portion adapted to mate with the brim of the container and separate therefrom during removal of the multilayer sheet from the brim and a leave-behind portion adapted to separate from the adhesive layer and the removable portion of the sealant layer to expose a portion of the adhesive layer during removal of the multilayer sheet from the brim and to remain in a stationary position on the brim of the container after removal of a pad comprising the skin layer, adhesive layer, and the removable portion of the multilayer sheet, and sealant-layer bond means for establishing an anchor bond between the leave-behind portion of the sealant layer and a mating portion of the brim of the container that has a bond strength that is greater than an interfacial bond strength of a releasable bond between the leave-behind portion of the sealant layer and a mating portion of the adhesive layer to cause the leave-behind portion of the sealant layer to break away from the adhesive layer due to cohesive bond failure to expose a portion of the adhesive layer and to separate from the removable portion of the sealant layer in response to application of a peeling force to the membrane sheet when the membrane sheet occupies a container-closing position on the brim of the container, wherein the sealant layer comprises a polypropylene homopolymer having a melt flow rate of about 12 g/10 min to about 40 g/10 min measured according to ASTM D1238. |
