Closure for container
A package includes a container and a closure. The container includes a body formed to include a product-storage region adapted to store products therein and a brim coupled to the body and formed to include a mouth opening into the product-storage region. The closure is coupled to the brim of the container by melting a portion of the closure together with a portion of the brim to block access to the products stored in the product-storage region.
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 in direct contact 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,
wherein the sealant layer includes 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,
wherein an anchor bond is established 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 that causes 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 multilayer sheet when the multilayer sheet occupies a container-closing position on the brim of the container, and
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 and a polypropylene-based elastomer.
2. The container of claim 1 , wherein the melt flow rate is about 36 g/10 min measured according to ASTM D1238.
3. The container of claim 2 , wherein the polypropylene homopolymer is about 60 wt % of the sealant layer and the polypropylene-based elastomer is about 40 wt % of the sealant layer.
4. The container of claim 1 , wherein the melt flow rate is about 30 g/10 min to about 40 g/10 min measured according to ASTM D1238.
5. The container of claim 4 , wherein the melt flow rate is about 36 g/10 min measured according to ASTM D1238.
6. The container of claim 1 , wherein the polypropylene homopolymer is about 50 wt % to 100 wt % of the sealant layer.
7. The container of claim 6 , wherein the sealant layer further comprises a polypropylene-based elastomer.
8. The container of claim 7 , wherein the polypropylene-based elastomer is up to 50 wt % of the sealant layer.
9. The container of claim 8 , wherein the polypropylene-based elastomer is about 30 wt % to 40 wt % of the sealant layer.
10. The container of claim 9 , wherein the sealant layer further comprises a polypropylene-based elastomer and the polypropylene-based elastomer is about 40 wt % of the sealant layer.
11. The container of claim 10 , wherein the polypropylene-based elastomer has a melt flow rate of about 2 g/10 min measured according to ASTM D1238.
12. The container of claim 11 , wherein the melt flow rate of the polypropylene homopolymer is about 36 g/10 min measured according to ASTM D1238.
13. The container closure of claim 1 , wherein the polypropylene homopolymer has a melt flow rate is about 14 g/10 min to about 36 g/10 min measured according to ASTM D1238.
14. The container closure of claim 1 , wherein the polypropylene homopolymer is about 60 wt % of the sealant layer and the polypropylene-based elastomer is about 40 wt % of the sealant layer.
15. The container closure of claim 1 , wherein the sealant layer further comprises an anti-fog polypropylene.
16. The container closure of claim 15 , wherein the polypropylene is about 60 wt % of the sealant layer, the polypropylene-based elastomer is about 30 wt % of the sealant layer, and the anti-fog polypropylene is about 10 wt % of the sealant layer.
17. 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 in direct contact 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,
wherein the sealant layer includes 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,
wherein an anchor bond is established 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 that causes 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 multilayer sheet when the multilayer sheet occupies a container-closing position on the brim of the container, and
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 and an elastomer.
18. The container of claim 17 , wherein the elastomer is polypropylene based.
19. The container of claim 1 , wherein the polypropylene homopolymer is about 50 wt % to 100 wt % of the sealant layer.
20. A multilayer sheet comprising
a sealant layer adapted to contact a brim of a container to close an opening that opens into a interior product-storage region formed in the container,
a skin layer,
an adhesive layer located between and arranged to interconnect the skin layer and the sealant layer,
wherein the sealant layer includes 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,
wherein an anchor bond is established 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 that causes 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 multilayer sheet when the multilayer sheet occupies a container-closing position on the brim of the container, and
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 and an elastomer.