Polymeric material for container

Patent metadata

Field	Value
Publication number	US-9937652-B2
Application number	US-201615059995-A
Country	US
Kind code	B2
Filing date	Mar 3, 2016
Priority date	Mar 4, 2015
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

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. An insulative cellular non-aromatic polymeric material comprising
about 50% to about 99.9% by weight of high density polyethylene (HDPE) base resin,
up to about 1% by weight of a chemical blowing agent,
up to about 15% by weight of a nucleating agent, and
a physical blowing agent,
wherein the insulative cellular non-aromatic polymeric material has a density of about 0.2 g/cm 3 to about 0.9 g/cm 3 .

2. The insulative cellular non-aromatic polymeric material of claim 1 , further comprising a low density polyethylene (LDPE) base resin.

3. The insulative cellular non-aromatic polymeric material of claim 2 , wherein the LDPE base resin is up to about 50% by weight of the insulative cellular non-aromatic polymeric material.

4. The insulative cellular non-aromatic polymeric material of claim 3 , wherein the LDPE base resin is about 10% to about 30% by weight of the insulative cellular non-aromatic polymeric material.

5. The insulative cellular non-aromatic polymeric material of claim 4 , wherein the LDPE base resin is about 20% by weight of the insulative cellular non-aromatic polymeric material.

6. The insulative cellular non-aromatic polymeric material of claim 4 , wherein the chemical blowing agent comprises citric acid and is about 0.1% to about 0.5% by weight of the insulative cellular non-aromatic polymeric material.

7. The insulative cellular non-aromatic polymeric material of claim 3 , wherein the HDPE base resin comprises a copolymer.

8. The insulative cellular non-aromatic polymeric material of claim 7 , wherein the physical blowing agent is introduced at a rate between about 0.01 kg/h and about 0.6 kg/h.

9. The insulative cellular non-aromatic polymeric material of claim 8 , wherein the physical blowing agent is introduced at a rate of about 0.03 kg/h.

10. The insulative cellular non-aromatic polymeric material of claim 2 , wherein the nucleating agent is about 0.5% to about 5% by weight of the insulative cellular non-aromatic polymeric material.

11. The insulative cellular non-aromatic polymeric material of claim 1 , wherein the HDPE base resin is about 60% to about 99% by weight of the insulative cellular non-aromatic polymeric material.

12. The insulative cellular non-aromatic polymeric material of claim 11 , wherein the HDPE base resin is about 80% by weight of the insulative cellular non-aromatic polymeric material.

13. The insulative cellular non-aromatic polymeric material of claim 12 , wherein the chemical blowing agent is about 0.1% by weight of the insulative cellular non-aromatic polymeric material.

14. The insulative cellular non-aromatic polymeric material of claim 13 , wherein the nucleating agent is talc and is about 1% by weight of the insulative cellular non-aromatic polymeric material.

15. The insulative cellular non-aromatic polymeric material of claim 1 , wherein the nucleating agent is talc and is about 0.5% to about 5% by weight of the insulative cellular non-aromatic polymeric material and the chemical blowing agent comprises citric acid and is about 0.1% to about 0.5% by weight of the insulative cellular non-aromatic polymeric material.

16. The insulative cellular non-aromatic polymeric material of claim 1 , wherein the density of the insulative cellular non-aromatic polymeric material is about 0.25 g/cm 3 to about 0.4 g/cm 3 .

17. The insulative cellular non-aromatic polymeric material of claim 16 , wherein the density of the insulative cellular non-aromatic polymeric material is about 0.35 g/cm 3 .

18. An insulative cellular non-aromatic polymeric material comprising
a base resin blend including a high density polyethylene (HDPE) base resin and a low density polyethylene (LDPE) base resin,
a chemical blowing agent,
a nucleating agent, and
a physical blowing agent,
wherein the insulative cellular non-aromatic polymeric material has a density of about 0.2 g/cm 3 to about 0.5 g/cm 3 .

19. The insulative cellular non-aromatic polymeric material of claim 18 , wherein the LDPE base resin is up to about 50% by weight of the base resin blend.

20. The insulative cellular non-aromatic polymeric material of claim 19 , wherein the LDPE base resin is about 10% to about 30% by weight of the base resin blend.

21. The insulative cellular non-aromatic polymeric material of claim 20 , wherein the LDPE base resin is about 20% by weight of the base resin blend.

22. The insulative cellular non-aromatic polymeric material of claim 19 , wherein the insulative cellular non-aromatic polymeric material further comprises regrind.

23. The insulative cellular non-aromatic polymeric material of claim 22 , wherein the regrind is up to about 50% by weight of the insulative cellular non-aromatic polymeric material.

24. The insulative cellular non-aromatic polymeric material of claim 23 , wherein the regrind is up to about 30% by weight of the insulative cellular non-aromatic polymeric material.

25. The insulative cellular non-aromatic polymeric material of claim 24 , wherein the physical blowing agent is up to about 0.2% of the insulative cellular non-aromatic polymeric material.

26. The insulative cellular non-aromatic polymeric material of claim 19 , wherein the HDPE base resin is about 50% to about 90% by weight of the base resin blend.

27. The insulative cellular non-aromatic polymeric material of claim 26 , wherein the HDPE base resin is about 80% by weight of the base resin blend.

28. The insulative cellular non-aromatic polymeric material of claim 27 , wherein the physical blowing agent is about 0.1% to about 0.3% of the insulative cellular non-aromatic polymeric material.

29. The insulative cellular non-aromatic polymeric material of claim 28 , wherein the physical blowing agent is N 2 gas.

Assignees

• Berry Plastics Corp

Inventors

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

Classifications

• B29C2949/0715

  the preform having one end closed · CPC title

• C08J2323/08

  Copolymers of ethene (C08J2323/16 takes precedence) · CPC title

• B32B2307/4026

  within the layer by addition of a colorant, e.g. pigments, dyes · CPC title

• B32B27/306

  comprising vinyl acetate or vinyl alcohol (co)polymers · CPC title

• B32B2439/70

  Food packaging · CPC title