×

Film laminate with gas barrier for sterile flexible containers

  • US 4,692,361 A
  • Filed: 09/28/1984
  • Issued: 09/08/1987
  • Est. Priority Date: 09/28/1984
  • Status: Expired due to Term
First Claim
Patent Images

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.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×