USE OF BOTTLE RECYCLATE IN RIGID PVC FOAM

It has been demonstrated that recycled PVC bottle material from the Re prise Technologies plant can be used successfully in Ca/Zn stabilized PVC-U foam formulations to produce profile of saleable quality. Increa sing amounts of bottle recyclate had no significant effect on gelation time, melt theology or plate-out characteristics and gave rise to an improvement in thermal stability. Foam blends were extruded on a produ ction-scale co-extrusion line to produce profile of good surface finis h and low foam density. Using up to 100% PVC bottle recyclate did not affect the density, cell structure or impact properties of the co-extr uded foam profile.