The reason for discoloration of pellet which was produced by gas phase technique in LLDPE unit was analyzed in this paper.

• 分析了气相法生产线性低密度聚乙烯(LLDPE)装置粒料颜色变黄的原因,从工艺条件、造粒设备、添加剂等几方面提出了改进措施。