A gravity flow carbon block filter comprising approximately 20-90 wt % activated carbon particles having a mean particle size in the range of approximately 90-220 μm, and approximately 10-50 wt % low melt index polymeric material. The low melt index polymeric material can have a melt index less than...http://www.google.com.hk/patents/US20060000763?utm_source=gb-gplus-share專利 US20060000763 - Gravity flow carbon block filter
