Tear resistant heat sealable packaging structure

Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers

Reexamination Certificate

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C428S483000, C428S511000, C428S520000

Reexamination Certificate



A tear resistant laminated comprised of a paper or paperboard substrate, and adhesive layer, a tear resistant layer secured to the adhesive layer, and a heat-sealable material. The tear resistant material has a a tear strength as measured by the Elmendorf tear propagation test of at least about 300 grams of force in both machine and cross direction.

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