Polymeric material for an insulated container

Patent metadata

Field	Value
Publication number	US-9783649-B2
Application number	US-201514739510-A
Country	US
Kind code	B2
Filing date	Jun 15, 2015
Priority date	Aug 31, 2011
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A formulation includes a polymeric material, a nucleating agent, a blowing, and a surface active agent. The formulation can be used to form a container.

First claim

The invention claimed is:

1. An insulative cellular non-aromatic polymeric material comprising
a first polymer material comprising at least one high melt strength polypropylene having a melting temperature of at least 163° C. (325.4° F.),
a second polymer material comprising at least one polymer selected from the group consisting of polypropylene, polyethylene, and mixtures thereof,
at least one nucleating agent selected from the group consisting of chemical nucleating agents, physical nucleating agents, and mixtures thereof, and
at least one blowing agent.

2. The insulative cellular non-aromatic polymeric material of claim 1 , wherein the first polymer material is greater than about 80% by weight of the insulative cellular non-aromatic polymeric material.

3. The insulative cellular non-aromatic polymeric material of claim 1 , wherein further comprising a colorant that is less than about 1% by weight of the insulative cellular non-aromatic polymeric material.

4. The insulative cellular non-aromatic polymeric material of claim 1 , wherein the at least one nucleating agent comprises a chemical nucleating agent that is greater than about 0.05% by weight of the insulative cellular non-aromatic polymeric material.

5. The insulative cellular non-aromatic polymeric material of claim 4 , wherein the chemical blowing agent is about 0.1% by weight of the insulative cellular non-aromatic polymeric material.

6. The insulative cellular non-aromatic polymeric material of claim 4 , wherein the at least one nucleating agent comprises a physical nucleating agent that is greater than about 0.25% by weight of the insulative cellular non-aromatic polymeric material.

7. The insulative cellular non-aromatic polymeric material of claim 4 , wherein the physical nucleating agent is less than about 2% by weight of the insulative cellular non-aromatic polymeric material.

8. The insulative cellular non-aromatic polymeric material of claim 4 , wherein the at least one nucleating agent comprises a physical nucleating agent that is less than about 2% by weight of the insulative cellular non-aromatic polymeric material.

9. The insulative cellular non-aromatic polymeric material of claim 1 , wherein the first polymer material is greater than about 82% by weight of the insulative cellular non-aromatic polymeric material.

10. The insulative cellular non-aromatic polymeric material of claim 9 , wherein the at least one nucleating agent comprises a physical nucleating agent.

11. The insulative cellular non-aromatic polymeric material of claim 1 , wherein the second polymer material is less than about 15% by weight of the insulative cellular non-aromatic polymeric material.

12. The insulative cellular non-aromatic polymeric material of claim 11 , wherein the at least one nucleating agent further comprises a chemical nucleating agent that is greater than about 0.1% by weight of the insulative cellular non-aromatic polymeric material.

13. The insulative cellular non-aromatic polymeric material of claim 1 , wherein the first polymer material is greater than about 82% by weight of the insulative cellular non-aromatic polymeric material, the second polymer material is less than about 15% by weight of the insulative cellular non-aromatic polymeric material, the at least one nucleating agent comprises a chemical nucleating agent that is about 0.1% by weight of the insulative cellular non-aromatic polymeric material and a physical nucleating agent that is in a range of about 0.25% to about 2% by weight of the insulative cellular non-aromatic polymeric material, a colorant that is about 1% by weight of the insulative cellular non-aromatic polymeric material, and further comprising a slip agent that is about 2% by weight of the insulative cellular non-aromatic polymeric material.

14. The insulative cellular non-aromatic polymeric material of claim 13 , wherein the insulative cellular non-aromatic polymeric material has a density in a range of about 0.15 g/cm 3 to about 0.19 g/cm 3 .

15. The insulative cellular non-aromatic polymeric material of claim 1 , wherein the insulative cellular non-aromatic polymeric material has a thermal conductivity to density ratio of about 0.3, wherein thermal conductivity is expressed in W/m-K at about 21° C. and density is expressed in g/cm 3 .

16. The insulative cellular non-aromatic polymeric material of claim 15 , wherein the insulative cellular non-aromatic polymeric material has a density of about 0.15 g/cm 3 to about 0.19 g/cm 3 .

17. The insulative cellular non-aromatic polymeric material of claim 15 , wherein the insulative cellular non-aromatic polymeric material has a density of about 0.155 g/cm 3 to about 0.1902 g/cm 3 .

18. The insulative cellular non-aromatic polymeric material of claim 15 , wherein the insulative cellular non-aromatic polymeric material has a density of about 0.155 g/cm 3 to about 0.182 g/cm 3 and wherein the insulative cellular non-aromatic polymeric material is an extrudate, and cells of the extrudate have a first dimension along a first axis and a second dimension along a second axis, the second axis is normal to the first axis, and wherein an average ratio of the first dimension to the second dimension is about 1.5 to about 3.0.

19. The insulative cellular non-aromatic polymeric material of claim 18 , wherein the cells of the extrudate have an average aspect ratio of between about 1.0 and about 3.0 along the first axis.

20. The insulative cellular non-aromatic polymeric material of claim 18 , wherein the cells of the extrudate have an average aspect ratio of between about 1.0 and about 2.0 along the second axis.

21. The insulative cellular non-aromatic polymeric material of claim 15 , wherein the insulative cellular non-aromatic polymeric material is an extrudate, and cells of the extrudate have a first dimension along a first axis and a second dimension along a second axis, the second axis is normal to the first axis, and wherein an average ratio of the first dimension to the second dimension is about 1.5 to about 3.0.

22. The insulative cellular non-aromatic polymeric material of claim 21 , wherein the cells of the extrudate have an average aspect ratio of between about 1.0 and about 2.0 along the second axis.

23. The insulative cellular non-aromatic polymeric material of claim 22 , wherein the first polymer crystal domain size is less than about 200 angstroms.

24. The insulative cellular non-aromatic polymeric material of claim 15 , wherein the second polymer material comprises at least one of a polypropylene copolymer and a polypropylene homopolymer.

25. The insulative cellular non-aromatic polymeric material of claim 1 , wherein the insulative cellular non-aromatic polymeric is an extrudate having a thermal conductivity to density ratio of about 0.3, wherein thermal conductivity is expressed in W/m-K at about 21° C. and density is expressed in g/cm 3 and the extrudate having a tear resistance of between about 2 grams-force/mil thickness to about 3.5 grams-force/mil thickness according to ASTM D1922-93 with a tear radius of about 1.7 inches.

26. The insulative cellular non-aromatic polymeric material of claim 25 , wherein the extrudate has a thickness of about 0.089 inches.

27. The insulative cellular non-aromatic polymeric material of claim 25 , wherein the extrudate has a density of about 0.155 g/cm 3 to about 0.1902 g/cm 3 .

28. The insul

Assignees

• Berry Plastics Corp

Inventors

• Leser Chris K
• Driskill Philip A
• Wallace Charles T
• Euler John B
• Paladino Jason J
• Maravich Milan C
• Davis Daniel O
• Mann Jeffrey A
• Bowlds Randy A
• Contrada Svetlana I

Classifications

• C08L23/10 Primary

  Homopolymers or copolymers of propene · CPC title

• C08L23/08

  Copolymers of ethene (C08L23/16 takes precedence) · CPC title

• C08L23/12 Primary

  Polypropene · CPC title

• B29D22/00

  Producing hollow articles (tubular articles B29D23/00; pneumatic tyres B29D30/00) · CPC title

• C08J9/08

  developing carbon dioxide · CPC title