Patent ID: 8474368

Claim:
A single use processing cup for brewing beverages comprising: a unitary molded multilayer thermoplastic polymeric cup defined by a continuous sidewall portion integral with a bottom portion and having an interior surface layer, an exterior surface layer and at least one intermediate layer, said cup having a top opening defined by a continuous perimeter flange integral with an upper edge portion of said continuous sidewall and located distally from said bottom portion; wherein said cup is formed from polymeric materials comprising a seven layer blown film laminated to a three layer cast sheet; wherein said blown film comprises, in sequential order, a first layer of polyethylene, a second layer of polyethylene, a third layer of anhydride modified polyethylene, a fourth layer of ethylene vinyl alcohol copolymer, a fifth layer of anhydride modified polyethylene, a sixth layer of ethylene vinyl acetate copolymer, a seventh layer of polystyrene; wherein at least one layer of the three layer cast sheet comprises a high impact polystyrene, a styrenic homopolymer or copolymer, or blends thereof and having from 20 to 50% by weight of calcium carbonate incorporated therein based upon the total weight of the at least one layer of the three layer cast sheet; wherein the incorporation of calcium carbonate in the polymeric material provides an average puncture force required to pierce the bottom of the cup less than required for a cup made from the same polymeric material without the calcium carbonate.