Patents Assigned to Cobelplast N.V.S.A.
  • Thermoformable, multi-layer plastic sheet having gas barrier properties
    Patent number: 4681797
    Abstract: A thermoformable, multi-layer plastic sheet with gas barrier properties is disclosed having an inner gas barrier layer, a glue layer applied to either side of the gas barrier layer and layers of a polyolefin composition bonded to the glue layers. To increase the tensile strength of the sheet during heating for the purpose of thermoforming, a second polyolefin layer is bonded to at least one of the two polyolefin layers, the second polyolefin layer having a lower melt index than the layer of the polyolefin composition beneath it.
    Type: Grant
    Filed: September 19, 1985
    Date of Patent: July 21, 1987
    Assignee: Cobelplast N.V.S.A.
    Inventor: Augustinus E. M. Van Iseghem