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Protective multilayer laminate for covering an electrochemical device

  • US 5,445,856 A
  • Filed: 11/10/1993
  • Issued: 08/29/1995
  • Est. Priority Date: 11/10/1993
  • Status: Expired due to Fees
First Claim
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1. A laminate, for use as a protective, insulating covering or wrap for an electrochemical battery or cell, the laminate capable of inhibiting transport of electricity, oxygen, and water therethrough which comprises:

  • a. a first layer which is a polymeric metal-containing ionomeric cross-linked ethylene-acrylic copolymer, said layer forming a heat seal when two portions of the laminate are heat sealed together to form said covering or wrap;

    b. a second layer which is a metal foil layer;

    c. a third layer which is a polymeric layer of a polymeric amide or a polyester;

    d. a fourth layer which is a polymeric adhesive polyethylene layer between the metal foil layer and the third layer;

    e. each of said polymeric layers being essentially devoid of hydroxide pendent groups;

    f. an oxygen scavenger incorporated in one of said polymeric layers or disposed between layers of the laminate; and

    g. said first layer being on one side of said second layer and said third layer being on the other side of said second layer.

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