以低密度聚乙烯（LLDPE）为基质的黑色母，采用国产220型炭黑。所以杂质少，适用于性能较低的薄膜，在挤出成型时也赋予制品优良的着色效果。

Low density polyethylene (LLDPE) as a substrate for the black mother, using the domestic type 220 carbon black pigment. Therefore,fewer impurities,applicable to lower performance in the film,extruding also give products excellent color effect.