Multi-layer web of film having a gas barrier

• US 5,098,202 A
• Filed: 05/11/1989
• Issued: 03/24/1992
• Est. Priority Date: 05/11/1989
• Status: Expired due to Term

• Current Assignee: Baxter International Inc.
• Original Assignee: Baxter International Inc.
• Inventors: Rosenbaum, Larry A.
• Primary Examiner(s): SLUBY, PATRICIA
• Application Number:
  US07/350,372
• Time in Patent Office: 1,048 Days
• Field of Search: 428/518, 428/520, 428/483, 428/215, 428/414, 428/36.7, 604/403, 604/408, 383/109, 383/113, 383/67
• US Class Current: 383/67
• CPC Class Codes: B32B 2250/05 5 or more layers
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 2307/7242 Non-permeable
• CPC Class Codes: B32B 2327/00 Polyvinylhalogenides
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: Y10T 428/1383 Vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit is sandwiched between layers [continuous layer]
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/31797 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/3192 Next to vinyl or vinylidene chloride polymer
• CPC Class Codes: Y10T 428/31928 Ester, halide or nitrile of addition polymer

Abstract

A web of film capable of being constructed into a flexible container is provided. The web of film comprises: a first layer of polyester; a second layer of polyvinyl chloride that does not include a DEHP plasticizer or epoxidized oil; a third gas barrier layer; a fourth layer of polyvinyl chloride that does not include a plasticizer; and a fifth layer of polyester. A container made from the film is also provided.

Claims

1. A web of film for producing flexible containers comprising:

a first layer of polyester;

a second layer of polyvinyl chloride that does not include a diethylhexylphthalate plasticizer or epoxidized oil;

a third gas barrier layer of polyvinylidene chloride;

a fourth layer of a polyvinyl chloride that does not include a plasticizer; and

a fifth layer of polyester.

2. The web of film of claim 1 wherein the polyvinyl chloride layers include an ethylene-vinyl acetate copolymer as a plasticizer.

3. The web of film of claim 1 wherein the polyester layers include a polycyclohexanedimethylcyclohexane di-carboxylate elastomer.

4. The web of film of claim 1:

the first layer has a thickness of approximately 0.0002 to about 0.0020 inches;

the second layer has a thickness of approximately 0.0020 to about 0.0110 inches;

the third layer has a thickness of approximately 0.0005 to about 0.004 inches;

the fourth layer has a thickness of approximately 0.0020 to about 0.0110 inches; and

the fifth layer has a thickness of approximately 0.0002 to about 0.0020 inches.

5. The web of film of claim 1 wherein the film has an overall thickness of approximately 0.005 inches to about 0.030 inches.

6. The web of film of claim 1 wherein the first, second, fourth, and fifth layers do not include epoxidized oil.

7. The web of film claim 1 wherein the gas barrier layer is polyvinylidene chloride.

8. A web of film for producing flexible medial containers comprising:

a first layer of polyester;

a second layer of polyvinyl chloride that does not include a diethylhexylphthalate plasticizer or epoxidized oil;

a third gas barrier layer of polyvinylidene chloride;

a fourth layer of polyvinyl chloride that does not include a diethylhexylphthalate plasticizer or epoxidized oil; and

a fifth layer of polyester.

9. The web of film of claim 8 wherein the polyvinyl chloride layers include an ethylene-vinyl acetate copolymer as a plasticizer.

10. The web of film of claim 8 wherein the polyester layers include a polycyclohexanedimethylcyclohexane di-carboxylate elastomer.

11. The web of film of claim 8:

the first layer has a thickness of approximately 0.00020 to about 0.0020 inches;

the second layer has a thickness of approximately 0.0020 to about 0.0110 inches;

the third layer has a thickness of approximately 0.0005 to about 0.004 inches;

the fourth layer has a thickness of approximately 0.0020 to about 0.0110 inches; and

the fifth layer has a thickness of approximately 0.00020 to about 0.0020 inches.

12. The web of film of claim 8 wherein the film has an overall thickness of approximately 0.005 inches to about 0.030 inches.

13. The web of film of claim 8 wherein the first, second, fourth, and fifth layers do not include epoxidized oil.

14. A flexible medical container having a body portion with opposed, sealed walls forming the container for containing fluids or solids that can be introduced into a patient body, the walls being constructed from a web of film comprising:

a first layer of polyester;

a second layer of polyvinyl chloride including an ethylene-vinyl acetate copolymer;

a third layer of a material that provides a gas barrier;

a fourth layer of a polyvinyl chloride including an ethylene-vinyl acetate copolymer; and

a fifth layer of polyester.

15. The web of film of claim 14 wherein the polyester layers include a polycyclohexanedimethylcyclohexane di-carboxylate elastomer.

16. The web of film of claim 14:

the first layer has a thickness of approximately 0.00020 to about 0.0020 inches;

the second layer has a thickness of approximately 0.0020 to about 0.0110 inches;

the third layer has a thickness of approximately 0.0005 to about 0.004 inches;

the fourth layer has a thickness of approximately 0.0020 to about 0.0110 inches; and

the fifth layer has a thickness of approximately 0.00020 to about 0.0020 inches.

17. The web of film of claim 14 wherein the film has an overall thickness of approximately 0.005 inches to about 0.030 inches.

18. The web of film of claim 14 wherein the first, second, fourth, and fifth layers do not include epoxidized oil.

19. The web of film of claim 14 wherein the material that provides a gas barrier is polyvinylidene chloride.

20. The flexible container of claim 14 including a fitment secured to a wall of the container providing a means for accessing the fluid or solid contained by the container.