Laminated packaging material for paper container

  • US 6,974,612 B1
  • Filed: 01/25/2000
  • Issued: 12/13/2005
  • Est. Priority Date: 01/27/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A packaging material for making paper containers having an interior comprising at least a thermoplastic material outermost layer, a paper substrate layer, a barrier layer, and a thermoplastic material innermost layer in such order, the innermost layer being adapted to be located closer to the interior of the paper container than the outermost layer when the packaging material is formed into the paper container,the thermoplastic material innermost layer containing at least a linear low density polyethylene which has an average density of 0.900 g/mL–

  • 0.915 g/mL, a peak melting point of 88°

    C. to 103°

    C., a melt flow index of 5 dg/min–

    20 dg/min, a swelling ratio of 1.4–

    1.6, and a layer thickness of 20–

    50-micrometer.

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