초록 ▼

A multilayer film is provided in the form of an extruded sheet for food wrapping and cooking procedures. The film is made up of alternating layers of a first generally ductile material and a second generally brittle material. Upon wrapping a food item or container, the film exhibits dead fold and/or

A multilayer film is provided in the form of an extruded sheet for food wrapping and cooking procedures. The film is made up of alternating layers of a first generally ductile material and a second generally brittle material. Upon wrapping a food item or container, the film exhibits dead fold and/or twistability characteristics. In one embodiment, the materials of the film are chosen to have softening points above about 450 degrees F. so that the film can be used in conventional ovens.

대표청구항 ▼

A multilayer film comprising at least 25 alternating layers of a first material and a second material, said first material comprising a ductile polymeric material having at least one distinct yield point, and wherein said first material is selected from the group consisting of polycarbonate, polyole

A multilayer film comprising at least 25 alternating layers of a first material and a second material, said first material comprising a ductile polymeric material having at least one distinct yield point, and wherein said first material is selected from the group consisting of polycarbonate, polyolefin, and nylon, said second material comprising a brittle polymeric material capable of fracturing upon the application of tensile stress and wherein said second material is selected from the group consisting of polystyrene, styrene-acrylonitrile copolymer, and poly (vinyl chloride), and the number of alternating layers being sufficient to cause said film to exhibit dead fold, creasing, and/or twistability characteristics.