Document Abstract
ANTEC Papers: 2003
Plasma Modified Polyolefin Powders For Rotational Molding
D. Boersch, Dr. Axel Pfitzmann, Dr. Peter Knoth
Reliable sources estimate that about 75% of moulded polyolefin technical parts need an upgraded surface appearance. Those surfaces have to be lacquered, dyed, glued, coated, or printed. Also, polyolefin resins offering better adhesion to PU foams are requested. The ARPLAS process offers improvements in quality, economics, and flexibility. This plasma-process modifies the chemical structure of the polyolefin powder surface in such a way, that non-polar, hydrophobic materials become polar, hydrophilic materials, which can be lacquered, coated , and foamed without any other additives. The modification of the plastic powder is achieved by implantation of functional groups into the polyolefin molecules. Characteristics of the material, i.e. impact strength, ESCR, and other major specifications remain unchanged as well as processing compared to traditional materials. The presentation provides a better understanding of what “plasma modification” is all about. The new ARPLAS technology offers moulders new application possibilities, opens up new market sectors, and reduces adhesion problems. If serious sticking/adhesive problems are to be solved, the use of ARPLAS treated powders make sense. This is also true if an acceptable paint coating is to be applied or a strong bond is to be made with PU foam.