Abstract: Process for forming an annular member by extruding a thermoplastic profiled strip at an elevated temperature. Prior to cooling the strip, the still-molten ends undergo in-line compression molding to form an annular member having a joint section. The cross-section of the annular member is continuous in the joint section and the remainder of the body. Preferably, the extrudate may contain a thermoplastic elastomer, more preferably a thermoplastic vulcanizate formed by a dynamic vulcanization process. During the extrusion and compression molding processes, the extrudate may be supported on a rotatable turntable, or alternately on a rotatable molding cylinder.

Abstract: In a process for forming low-density foamed articles, a blend of foamable thermoplastic material and physical foaming agent concentrate is mixed and melted and expanded to form an extruded foam article.

Abstract: A tapered stepped land having a choked funnel section which terminates in a lateral longitudinal section results in the formation of a foamed extrudate of a vulcanized blend of polyolefin and rubber which is a mass of closed cells having a specific gravity in the range from about 0.1 to 0.5 and the cells are sheathed in a dense non-porous, smoothly continuous skin which is formed integrally with the extrudate. The dense skin makes it possible to deposit a thin slip-coating of a low friction material longitudinally upon a chosen portion of the surface. An extruded weatherseal for the glass of an automobile's window has the slip-coating deposited as a thin film on a contacting strip of a surface which is in contact with the glass.