We will be talking about Hubercarb® W4 calcium carbonate next week at Composites 2013. Be sure and stop by booth 633 to learn more.
W4 is milled from a unique micritic limestone ore. This soft and virtually silica-free ore also mills to a more spherical shape than conventional marble sources, which grind to rhombohedral forms. This provides for maximum particle packing and minimizes glass breakage during processing and molding operations.
W4 Morphology (Click on the Micrographs to Enlarge)
Look at the micrographs for Competitor A and Competitor B as they illustrate the sharp edges inherent in such crystal forms. In comparison, Hubercarb W4 mills to a more spherical form with far less sharp edges that can break glass fibers and introduct stress concentration points in the final product. Click on the micrographs to enlarge.
For more information on W4, Contact Us!