Abstract: Generally linear foamable strandular particles which are asymmetrical about a plane generally containing the longitudinal axis provide a desired curled dunnage material when heated to cause foaming. A wide variety of methods may be used to introduce the desired asymmetry.

Abstract: A process for the manufacture of profiled products by extruding in a substantially non-expanded state an expandable styrene polymer composition through a die orifice having the desired profile and subsequently passing the extruded material through a sizing member wherein it expands to the desired profile and cross-section to produce an article having a porous inner cross-section and a solid, non-foamed outer layer and wherein the styrene polymer composition employed is one containing from about 0.2 to 1.0 parts by weight of an alkaline earth metal carbonate blowing agent and from about 0.2 to 1.0 parts by weight of an organic acid per 100 parts by weight of styrene polymer.

Abstract: Cups having a sidewall made from foam sheet plastic with a fusion sealed, lapped seam, wherein the lapped seam and the sidewall immediately adjacent the lapped seam are of identical thickness, are provided with additional rigidity per unit wall thickness by compressing the foam sheet either in-line with the foam extrusion operation or up to several months after extrusion. The cup is characterized by a substantial skin on only the outer surface of the sidewall.