A multi-layered pipe of arbitrary length and cross-section is produced by
co-extrusion of a segmented thermoplastic copolyester elastomer (COPE)
outer body over the exterior surface of an annular tubular core of
CPVC/PVC having a wall thickness, measured in the radial direction, in
the range from about 0.95 mm (38 mils) to about 1.375 mm (55 mils). The
COPE is cohesively bonded to the annular core coextensively with
essentially the entire length of the pipe. Though the COPE is easily
degraded in contact with water, and CPVC and blends of CPVC with less
than 25% by weight of PVC are typically rigid when extruded as pipe, a
laminated pipe of COPE and CPVC/PVC with the specified wall thickness and
overall dimensions which in the laminated pipe satisfy an applicable
plumbing code (SDR-11 in the U.S.) has essentially the same performance
characteristics as commercially available CPVC pipe which is a monolayer
and not a laminate.