Processing Aid for PVC Foam Sheet LP-92 is a new ultra high molecular weight acrylic processing aid for rigid PVC and high quality foam applications. Its give the following performance properties-Low torque, faster fusion, high melt strength and expansion.
link:http://www.repolyfine.com/pvc-processing-aid/pvc-foaming-regulator/processing-aid-for-pvc-foam-sheet.html