Film laminate with gas barrier for sterile flexible containers
First Claim
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1. A laminate film structure having sufficient flexibility, strength, heat sealability, and slip properties for producing on a packaging machine flexible containers having fitments attached thereto and capable of containing a liquid to be maintained under sterile conditions comprising:
- an inner layer constructed from polyethylene, the inner layer having a thickness of approximately 40 to 100 microns;
a gas barrier layer having a thickness of approximately 25 to 50 microns;
a core layer constructed from biaxially oriented polyamide, the core layer having a thickness of approximately 10 to 40 microns;
an outer layer constructed from polyethylene and having a thickness of approximately 40 to 100 microns, the outer layer including a slip agent and having a coefficient of friction of approximately 0.2 to about 0.4; and
three layers of an aliphatic polyurethane bonding the layers together.
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Abstract
A film laminate for flexible containers capable of containing a product to be maintained and removed under sterile conditions. The film laminate having an outside layer of linear low density polyethylene, a gas barrier layer, a core layer of polyamide, and an inside layer of linear low density polyethylene. The layers being bonded together by a polyurethane adhesive.
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Citations
34 Claims
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1. A laminate film structure having sufficient flexibility, strength, heat sealability, and slip properties for producing on a packaging machine flexible containers having fitments attached thereto and capable of containing a liquid to be maintained under sterile conditions comprising:
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an inner layer constructed from polyethylene, the inner layer having a thickness of approximately 40 to 100 microns; a gas barrier layer having a thickness of approximately 25 to 50 microns; a core layer constructed from biaxially oriented polyamide, the core layer having a thickness of approximately 10 to 40 microns; an outer layer constructed from polyethylene and having a thickness of approximately 40 to 100 microns, the outer layer including a slip agent and having a coefficient of friction of approximately 0.2 to about 0.4; and three layers of an aliphatic polyurethane bonding the layers together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 33)
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10. A film structure having sufficient flexibility, strength, heat sealability, and slip properties for producing on a packaging machine a flexible container for containing a liquid to be administered into a patient'"'"'s body comprising:
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a layer of a linear low density polyethylene copolymer for forming an outside layer of the flexible container; a layer of polyvinylidene chloride for forming a gas barrier layer; a layer of biaxially oriented nylon for forming a core layer of the flexible container; a layer of a linear low density polyethylene copolymer for forming an inside layer of the flexible container; and the layers being bonded by a polyurethane adhesive. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A flexible container capable of containing under sterile conditions a fluid or solid to be stored at temperatures above 0°
- C. having a body portion with opposed, peripherally sealed walls forming the container the walls being constructed from a laminate comprising;
an outside layer constructed from linear low density polyethylene; a gas barrier layer constructed from polyvinylidene chloride; a core layer constructed from biaxially oriented nylon; an inside layer constructed from linear low density polyethylene; and three layers of a urethane adhesive for bonding the outside, vapor barrier, core, and inside layers. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34)
- C. having a body portion with opposed, peripherally sealed walls forming the container the walls being constructed from a laminate comprising;
Specification