Bag-on-valve assembly

• US 8,119,211 B1
• Filed: 01/28/2009
• Issued: 02/21/2012
• Est. Priority Date: 01/28/2009
• Status: Active Grant

• Current Assignee: Bemis Company Incorporated (Amcor Plc)
• Original Assignee: Curwood Incorporated (Amcor Plc)
• Inventors: Taylor, Nathan Edward, Nettekoven, John Kenneth
• Primary Examiner(s): PATTERSON, MARC A
• Application Number:
  US12/361,465
• Time in Patent Office: 1,119 Days
• Field of Search: 428/34.1, 428/34.2, 428/35.2, 428/35.7, 428/35.9, 428/36.9
• US Class Current: 428/35.2
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/31 Heat sealable
• CPC Class Codes: B32B 2307/7244 Oxygen barrier
• CPC Class Codes: B32B 2307/7246 Water vapor barrier
• CPC Class Codes: B32B 2439/00 Containers; Receptacles closures therefor B32B2435/00
• CPC Class Codes: B32B 2439/46 Bags
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/327 comprising polyolefins obtained by a metallocene or single-site catalyst
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: Y10T 428/13 Hollow or container type article [e.g., tube, vase, etc.]
• CPC Class Codes: Y10T 428/1303 Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
• CPC Class Codes: Y10T 428/1334 Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/1359 Three or more layers [continuous layer]
• CPC Class Codes: Y10T 428/139 Open-ended, self-supporting conduit, cylinder, or tube-type article

Abstract

The present invention is directed to a bag-on-valve assembly comprising a valve stem and a flexible bag which is affixed to the valve stem and encapsulates a portion of said valve stem therein. The bag comprises a sealable thermoplastic film which is free of foil and is adapted to have an Tensile Energy to Break value of at least 150 in*ft-lbs in both the machine direction and transverse directions.

Claims

1. A bag-on-valve assembly for containing a product to be dispensed from a aerosol container comprising:

a) a valve stem;

b) a flexible bag affixed to said valve stem and encapsulating a portion of said valve stem therein;

wherein said bag comprises a sealable thermoplastic film which is free of metallic foil;

c) wherein said film is adapted to have a tensile energy to break value of at least 150 inch-pounds-force per cubic inch in both the machine direction and transverse directions as measured in accordance with ASTM D 882-83; and

d) wherein when said bag-on-valve assembly is actuated said product is dispensed from said bag through said valve stem.

2. The bag-on-valve assembly according to claim 1, wherein said film has a Slow Rate Penetration Resistance value greater than 21 Newtons.

3. The bag-on-valve assembly according to claim 1, wherein said film has a Slow Rate Penetration Resistance value greater than 24 Newtons.

4. The bag-on-valve assembly according to claim 1, wherein said film has a Tensile Peak Load value of at least 22 pound-force.

5. The bag-on-valve assembly according to claim 1, wherein said film has a Tensile Peak Load value of at least 25 pound-force.

6. The bag-on-valve assembly according to claim 1, wherein said film has a Tensile Modulus value of at least 70,000 pounds/square inch in both the machine and transverse directions.

7. The bag-on-valve assembly according to claim 1, wherein said film has an overall thickness of greater than 3.0 mils.

8. The bag-on-valve assembly according to claim 1, wherein said film has an overall thickness of greater than 4.0 mils.

9. The bag-on-valve assembly according to claim 1, wherein said film further comprises a heat-sealable layer having a thickness of 3.0 mils or less whereby said bag is heat sealed to said valve stem.

10. The bag-on-valve assembly according to claim 1, wherein said film comprises at least one layer of nylon.

11. The bag-on-valve assembly according to claim 10, wherein said nylon is a nylon blend.

12. The bag-on-valve assembly according to claim 1, wherein said film comprises at least two layers of nylon.

13. The bag-on-valve assembly according to claim 1, wherein said film comprises at least three layers of nylon.

14. The bag-on-valve assembly according to claim 1, wherein said film comprises at least two layers of nylon in direct contact with a layer of barrier material.

15. The bag-on-valve assembly according to claim 14, wherein said film has an oxygen transmission rate of 10 cm/100 inch²/24 hr or less as measured at 23°

C. and 80% relative humidity.

23. The bag-on-valve assembly according to claim 11, wherein said film further comprises at least two layers of nylon.

16. A bag-on-valve assembly for containing a product to be dispensed from an aerosol container comprising:

a) a valve stem;

b) a flexible bag heat-sealed to said valve stem and encapsulating a portion of said valve stem therein;

wherein said bag comprises a multilayer heat-sealable thermoplastic film which is free of metallic foil and has an overall film thickness greater than 3.0 mils;

wherein said film comprises a heat-sealable layer having a thickness of 3.0 mils or less and at least one layer of nylon;

c) wherein said film is adapted to have an Tensile Energy to Break value of at least 150 inch-pounds-force per cubic inch in both the machine direction and transverse directions as measured in accordance with ASTM D 882-83;

d) wherein when said bag-on-valve assembly is actuated said product is dispensed from said bag through said valve stem.

17. The bag-on-valve assembly according to claim 16, wherein said film has an overall film thickness greater than 4.0 mils.

18. The bag-on-valve assembly according to claim 16, wherein said film has a Slow Rate Penetration Resistance value greater than 21 Newtons.

19. The bag-on-valve assembly according to claim 16, wherein said film has a Slow Rate Penetration Resistance value greater than 22 Newtons.

20. The bag-on-valve assembly according to claim 16, wherein said film has a Tensile Peak Load value of at least 22 pound-force.

21. The bag-on-valve assembly according to claim 16, wherein said film has a Tensile Peak Load value of at least 25 pound-force.

22. The bag-on-valve assembly according to claim 16, wherein said film has a Tensile Modulus value of at least 100,000 pounds/square inch in both the machine and transverse directions.

24. The bag-on-valve assembly according to claim 16, wherein said film comprises at least three layers of nylon.

25. The bag-on-valve assembly according to claim 16, wherein at one of said layers of nylon is a nylon blend.

26. The bag-on-valve assembly according to claim 16, wherein said film further comprises at least two layers of nylon in direct contact with a layer of barrier material.

27. The bag-on-valve assembly according to claim 26, wherein said film has an oxygen transmission rate of 10.0 cm³/100 inch²/24 hr or less as measured at 23°

C. and 80% relative humidity.

28. A bag-on-valve assembly for containing a product to be dispensed from an aerosol container comprising:

a) a valve stem;

b) a flexible bag heat-sealed to said valve stem and encapsulating a portion of said valve stem therein;

wherein said bag comprises a multilayer thermoplastic oxygen barrier film which is free of metallic foil and has an overall film thickness greater than 4.0 mils;

wherein said film comprises a heat-sealable layer having a thickness of 3.0 mils or less and at least two layers of nylon in direct contact with a layer of ethylene/vinyl alcohol copolymer;

c) wherein said film is adapted to have an oxygen transmission rate of 10.0 cm³/100 in²/24 hr or less as measured at 23°

C. and 80% relative humidity and Tensile Energy to Break value of at least 150 inch-pounds-force per cubic inch in both the machine direction and transverse directions as measured in accordance with ASTM D 882-83;

d) wherein when said bag-on-valve assembly is actuated said product is dispensed from said bag through said valve stem.

29. The bag-on-valve assembly according to claim 28, wherein said film has a Slow Rate Penetration Resistance value greater than 24 Newtons.

30. The bag-on-valve assembly according to claim 28, wherein said film has a Tensile Peak Load value of at least 25 pound-force.

31. The bag-on-valve assembly according to claim 28, wherein said film has a Tensile Modulus value of at least 100,000 pounds/square inch in both the machine and transverse directions.

32. The bag-on-valve assembly according to claim 28, wherein said film further comprises at least three layers of nylon.

33. The bag-on-valve assembly according to claim 28, wherein said film has a Slow Rate Penetration Resistance value greater than 24 Newtons.

34. The bag-on-valve assembly according to claim 28, wherein said film has a Tensile Peak Load value of at least 25 pound-force.

35. The bag-on-valve assembly according to claim 28, wherein at least one of said nylon layers is a nylon blend.