Multilayer sheet with one layer easily peelable from another
AssigneeSiamp Cedap
InventorsFrancis Pinsolle, Vincent Chaupin
Life of this patent
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Abstract
Multilayer sheet for making containers with lid closed by sealing. The upper layer 7 is comprised of an heterogeneous mixture of two products having different coefficients of viscosity, the most fluid product being compatible with the lower layer 8 of the lid. Removal of the lid leads to tearing of the upper layer 7 by decohesion.
Claims6
Plastic multilayer sheet for a sealable container having a lid, said sheet being of multiple layers and having an upper layer for sealing to a lower layer, said sheet upper layer being a composite layer comprising an heterogeneous mixture of two materials with different viscosities, the more fluid material forming on the surface to be sealed to the lower lid layer a quasi-continuous film such that after sealing with the lid, said upper composite layer is torn through its thickness by decohesion upon removal of the lid.
Dependencies are inferred from the claim text.