Abstract: A new and improved tier sheet comprises a three-layer laminated extrusion comprising outer layers of a suitable polypropylene homopolymer, and an inner core layer comprising a suitable polypropylene copolymer blended with a suitable elastomer selected from the group comprising SANTOPRENE®, KRATON®; ethyl vinyl acetate (EVA), and a thermoplastic olefin (TPO).

Abstract: An air damper includes a main housing having an interior wall defining an inner chamber, a piston disposed within the inner chamber, and an arch-shaped gasket member connected to the piston. The arch-shaped gasket member includes an annular rim that sealingly engages the interior wall of the housing.

Abstract: Thermal breaker or thermal barrier structures are disclosed for use in connection with roof decking assemblies wherein the thermal breaker or thermal barrier structures effectively prevent the respective transmission of heating gradients from the interior or exterior building environments to the exterior or interior building environments by thermal conductivity so as to render buildings more energy efficient.

Abstract: A novel shrinkable monolayer film that may be produced as a film or a tube, as in a food casing. This newly disclosed film is a blend of a polyamide base, a novel polyvinyl alcohol and optionally, an antiblocking agent.