Polymeric material for container

Patent metadata

Field	Value
Publication number	US-12145303-B2
Application number	US-202017075183-A
Country	US
Kind code	B2
Filing date	Oct 20, 2020
Priority date	Mar 4, 2015
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

A formulation for producing a polymeric material including high-density polyethylene, a chemical blowing agent, and other optional components is described.

First claim

The invention claimed is:

1. A container comprising:
a floor and
a container wall extending away from the floor, and the container wall and the floor cooperate to form an interior product storage region,
wherein the container wall is formed of a multi-layer material including a first layer of an insulative cellular non-aromatic polymeric material comprising high density polyethylene and a second layer comprising high density polyethylene and in contact with an outer surface of the first layer to locate the insulative cellular non-aromatic polymeric material between the second layer and the interior product-storage region,
wherein the first layer is extruded and the second layer is extruded on the first layer to cause the first layer and the second layer to contact one another,
wherein the container has a density less than about 0.4 g/cm 3 .

2. The container of claim 1 , wherein the first layer and the second layer are extruded together.

3. The container of claim 1 , wherein the second layer is about 5 mils to about 26 mils thick.

4. The container of claim 3 , wherein the container has an average collapse force in a range of about 50 pounds-Force to about 400 pounds-Force.

5. The container of claim 4 , wherein the container survives top load forces of 115 pounds-Force to about 170 pounds-Force.

6. The container of claim 3 , wherein the first layer is about 14 mils to about 130 mils thick.

7. A container comprising:
a floor and
a container wall extending away from the floor, and the container wall and the floor cooperate to form an interior product storage region,
wherein the container wall is formed of a multi-layer material including a first layer of an insulative cellular non-aromatic polymeric material comprising high density polyethylene and a second layer arranged to locate the insulative cellular non-aromatic polymeric material between the second layer and the interior product-storage region, and
wherein the insulative cellular non-aromatic polymeric material comprises regrind of previously prepared containers.

8. The container of claim 7 , wherein the regrind is free of aromatic material.

9. A method of producing a container, the method comprising:
extruding a first layer of an insulative cellular non-aromatic polymeric material comprising high density polyethylene,
extruding a second layer onto an outer surface of the first layer to contact the first layer to form a multilayer material, the second layer comprising high-density polyethylene, and
forming a container from the multilayer material,
wherein the container has a floor, a container wall extending away from the floor and the container wall and the floor cooperate to form an interior product storage region,
wherein the container has a density less than about 0.4 g/cm 3 .

10. The method of claim 9 , wherein the second layer is about 5 mils to about 26 mils thick.

11. The method of claim 10 , wherein the container has an average collapse force of in a range of about 50 pounds-Force to about 400 pounds-Force.

12. The method of claim 11 , wherein the container survives top load forces of 115 pounds-Force to about 170 pounds-Force.

13. The method of claim 9 , wherein the container has an average collapse force of in a range of about 50 pounds-Force to about 400 pounds-Force.

Assignees

• Berry Plastics Corp

Inventors

• Sun David Dezhou
• Driskill Philip A
• Cain Tony
• Marret Diane E
• Wilson Debra R
• Ponrathnam Timothy

Classifications

• B29C49/0411

  Means for defining the wall or layer thickness · CPC title

• B29C49/22

  using multilayered preforms or parisons · CPC title

• B29C49/04

  Extrusion blow-moulding · CPC title

• B29C49/48

  Moulds · CPC title

• B29L2031/7126

  large, e.g. for bulk storage · CPC title