Container carrier

Patent metadata

Field	Value
Publication number	US-11845599-B2
Application number	US-202016741149-A
Country	US
Kind code	B2
Filing date	Jan 13, 2020
Priority date	Jan 14, 2019
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

A flexible carrier for carrying a plurality of containers, such as soft drink and other beverage containers, is formed from a polymer composition which provides the carrier with improved recovery, tensile strength and tear resistance. The polymer composition includes about 40-60% by weight of a low density ethylene polymer having a density of about 0.910-0.950 grams/cm3 and about 40-60% by weight of a post-consumer recycled product blend of low density polyethylene polymer and linear low density polyethylene polymer.

First claim

The invention claimed is:

1. A flexible carrier for carrying a plurality of containers, consisting of a flexible sheet, the flexible sheet including a plurality of primary apertures having only convex edges formed in the sheet for receiving portions of the containers by stretching the flexible carrier surrounding the primary apertures around the containers and allowing the flexible carrier surrounding the primary apertures to recover, thereby providing a tight engagement with the containers within the primary apertures, the flexible sheet comprising a polymer composition which includes:
about 30-80% by weight of a branched low density polyethylene polymer including about 80 to 99.5% by weight ethylene and 0.5 to about 20% by weight of a carbon monoxide comonomer, the branched low density polyethylene polymer having a density of about 0.910 to 0.935 grams/cm 3 and a melt flow rate of about 0.2 to about 3.0 crams/10 min and prepared using a high pressure polymerization process;
about 20-70% by weight of a post-consumer recycled product blend that includes about 45% to about 53% by weight of a post-consumer recycled low density polyethylene polymer and about 38% to about 45% by weight of a post-consumer recycled linear low density polyethylene polymer, the post-consumer recycled product blend including at least about 90% combined weight of the post-consumer recycled low density polyethylene polymer and the post-consumer recycled linear low density polyethylene polymer and the blend having a density of about 0.920 to about 0.935 grams/cm 3 and a melt flow rate of about 0.5 to about 1.5 grams/10 min; and
optionally, about 0-10% by weight of other additives;
wherein the flexible carrier is capable of receiving and carrying from four to twelve of the containers in tight engagement within the primary apertures without breakage of the flexible carrier or loss of the containers.

2. The flexible carrier of claim 1 , wherein the branched low density polyethylene polymer further comprises another alpha-olefin comonomer.

3. The flexible carrier claim 2 , wherein the alpha-olefin comonomer comprises at least one of Propylene, Butene, Hexene and Styrene.

4. The flexible carrier of claim 1 further comprising an additive that results in photodegradability.

5. The flexible carrier of claim 1 , comprising not less than four and not more than eight of the primary apertures.

6. The flexible carrier of claim 1 , wherein the branched low density polyethylene polymer has a density of about 0.920-0.935 grams/cm3.

7. The flexible carrier of claim 1 , wherein the other additives comprise a single-site catalyzed ethylene-alpha olefin copolymer plastomer having a density of about 0.850-0.905 grams/cm3.

8. The flexible carrier of claim 7 , wherein the single-site catalyzed ethylene-alpha olefin copolymer plastomer comprises an alpha-olefin comonomer having 3-12 carbon atoms.

9. The flexible carrier of claim 8 , wherein the alpha-olefin comonomer has 4-8 carbon atoms.

10. The flexible carrier of claim 1 , wherein the polymer composition comprises about 40-60% by weight of the branched low density polyethylene polymer and about 40-60% by weight of the post-consumer recycled product blend, without substantial loss of mechanical properties from a flexible carrier without post-consumer recycled product.

11. The flexible carrier of claim 1 , wherein the branched low density polyethylene polymer comprises about 0.5 to about 10% by weight of the carbon monoxide comonomer.

12. A flexible carrier for carrying a plurality of containers, consisting of a flexible sheet, the flexible sheet including a plurality of primary apertures having only convex edges formed in the sheet for receiving portions of the containers by stretching the flexible carrier surrounding the primary apertures around the containers and allowing the flexible carrier surrounding the primary apertures to recover, thereby providing a tight engagement with the containers within the primary apertures, the flexible sheet comprising a polymer composition which includes:
about 40-60% by weight of a branched low density polyethylene polymer including about 80 to 99.5% by weight ethylene and 0.5 to about 20% by weight of a carbon monoxide comonomer, the branched low density polyethylene polymer having a density of about 0.910 to 0.935 grams/cm 3 and a melt flow rate of about 0.2 to about 3.0 grams/10 min and prepared using a high pressure polymerization process;
about 40-60% by weight of a post-consumer recycled product blend that includes about 45% to about 53% by weight of a post-consumer recycled low density polyethylene polymer and about 38% to about 45% by weight of a post-consumer recycled linear low density polyethylene polymer, the post-consumer recycled product blend including at least about 90% combined weight of the post-consumer recycled low density polyethylene polymer and the post-consumer recycled linear low density polyethylene polymer and the blend having a density of about 0.920 to about 0.935 grams/cm 3 and a melt flow rate of about 0.5 to about 1.5 grams/10 min; and
optionally, about 0-10% by weight of other additives;
wherein the flexible carrier is capable of receiving and carrying from four to twelve of the containers in tight engagement within the primary apertures without breakage of the flexible carrier or loss of the containers.

13. The flexible carrier of claim 12 , wherein the branched low density polyethylene polymer comprises about 0.5-10% by weight of the carbon monoxide comonomer.

14. A flexible carrier for carrying a plurality of containers, consisting of a flexible sheet, the flexible sheet including a plurality of primary apertures having only convex edges formed in the sheet for receiving portions of the containers by stretching the flexible carrier surrounding the primary apertures around the containers and allowing the flexible carrier surrounding the primary apertures to recover, thereby providing a tight engagement with the containers within the primary apertures, the flexible sheet comprising a polymer composition which includes:
about 40-60% of a branched low density polyethylene polymer including about 80 to 99.5% by weight of ethylene and 0.5 to about 20% by weight of a carbon monoxide comonomer, the branched low density polyethylene polymer having a density of about 0.910 to 0.935 grams/cm 3 and a melt flow rate of about 0.2 to about 3.0 grams/10 min and prepared using a high pressure polymerization process;
about 40-60% by weight of a post-consumer recycled product blend of that includes about 45% to about 53% by weight of a post-consumer recycled low density polyethylene polymer and about 38% to about 45% by weight of a post-consumer recycled linear low density polyethylene polymer, the post-consumer recycled product blend including at least about 90% combined weight of the post-consumer recycled low density polyethylene polymer and the post-consumer recycled linear low density polyethylene polymer and the blend having a density of about 0.920 to about 0.935 grams/cm 3 and a melt flow rate of about 0.5 to about 1.5 grams/10 min; and
optionally, about 0-10% by weight of other additives;
wherein the flexible carrier is capable of receiving and carrying from four to ten of the containers in tight engagement within the primary apertures without breakage of the flexible carrier or loss of the containers.

15. The flexible carrier of claim 14 , wherein the branched low density polyethylene polymer has a density of about 0.925-0.931 grams/cm 3 .

16. The flexible carrier of claim 14 , wherein the branched low density polyethylene polymer

Assignees

• Illinois Tool Works

Inventors

• Samaras Peter L
• Slovik Rachell L
• Van Tholen Patrick R

Classifications

• B65D71/504 Primary

  the element being formed from a flexible sheet provided with slits or apertures intended to be stretched over the articles and adapt to the shape of the article · CPC title

• C08K5/01

  Hydrocarbons {(C08K5/0091 takes precedence)} · CPC title

• C08L23/06

  Polyethylene · CPC title

• C08L23/0815

  with aliphatic 1-olefins containing one carbon-to-carbon double bond · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title