Film laminate 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 a flexible container for containing a liquid to be administered into a patient'"'"'s body comprising:
- a layer of a linear low density polyethylene for forming an outside layer of the flexible container;
a layer of biaxially oriented nylon for forming a core layer of the flexible container;
a layer of a linear low density polyethylene for forming an inside layer of the flexible container; and
the outside layer and inside layer being bonded to the core layer by separate layers of polyurethane adhesive.
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Abstract
A film laminate for flexible containers capable of containing a product to be maintained and accessed under sterile conditions. The laminate having an outside layer of linear low density polyethylene, a core layer of nylon, an inside layer of linear low density polyethylene and two layers of a polyurethane adhesive for bonding the layers.
177 Citations
32 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 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 for forming an outside layer of the flexible container; a layer of biaxially oriented nylon for forming a core layer of the flexible container; a layer of a linear low density polyethylene for forming an inside layer of the flexible container; and the outside layer and inside layer being bonded to the core layer by separate layers of polyurethane adhesive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A flexible container capable of containing a fluid or solid under sterile conditions having a body portion with opposed, perpherally sealed walls forming the container the walls being constructed from a five layer laminate comprising:
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an outside layer constructed from linear low density polyethylene; a core layer constructed from a biaxially oriented polyamide; an inside layer constructed from linear low density polyethylene; and two layers of a urethane adhesive bonding the inside and outside layers to the core layer on opposed sides thereof. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A laminate film structure having sufficient flexibility, strength, heat sealability, and slip properties for producing in 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 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 two layers of an aliphatic polyurethane bonding the inner and outer layers to the core layer. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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32. 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 frozen product 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 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; two layers of an aliphatic polyurethane bonding the inner and outer layers to the core layer; and the glass transition state of the laminate film structure being less than -25°
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Specification