... 1000mm width3. white OE level 4. for air filter Heat melt filter non-woven, is applicable for automotive environmental protection ... Squaremeters.•2003, Research and Development Automotive air filter material,and Establied Retop Filter Materials Co., LTD •2004, Started manufacturing ... Carbon Non Wovens. •2010, Became the complete Automotive Filter non woven supplier in China •2011, Relocated to Tangxia ...