PE高压塑料造粒比较广泛，大多分为一级和二级，有的厂家用的是一级料，也有的厂家想降低成本选择二级料，可想而知二级料成产出来的产品亮度会差一点，怎么才能达到一级料的亮度。塑料助剂专家建议添加光亮剂，有很多厂家选择比较低端的光亮剂，低端的添加量比较大，从成本上也是增加了不少，还有一个缺陷就是和PE塑料相溶性差，在热熔的时候光亮剂都是浮在表面，冷却之后也是一样，表现出来的现象就是手指一划会出现白痕，给用户造成很大的困扰。通过很多厂家的反馈回来的结果是二级料生产的时候添加升级版粉末可以达到一级料的效果，有的可以达到全新料的效果。用在造粒上效果比较好，操作简单，不改变生产工艺，和原材料均匀搅拌就可以，为了防止光亮剂沉底，可以适当的配合一点工业白油，这样分散效果好。在热熔条件下有很好的流动性，对色粉也有很好的流动性，亮度可以提升两倍以上，出来的产品亮度像镜子一样。
PE high-pressure plastics granulation is more extensive, mostly divided into first-class and second-class, some manufacturers use first-class materials, some manufacturers want to reduce costs and choose second-class materials, it can be imagined that the product produced by the second-class materials will be less brightness, how to achieve the brightness of first-class materials. Plastic additives experts recommend adding brighteners, many manufacturers choose relatively low-end brighteners, low-end additives are relatively large, from the cost is also increased a lot, there is also a defect is poor compatibility with PE plastics, brighteners are floating on the surface when hot melting, after cooling, the same phenomenon is that the finger scratches will appear white marks, to users. It causes a lot of trouble. The result of feedback from many manufacturers is that adding upgraded powder in the production of secondary materials can achieve the effect of primary materials, and some can achieve the effect of new materials. It can be used in granulation with good effect, simple operation, no change in production process, and even mixing with raw materials. In order to prevent brightener from sinking, it can be properly combined with a little industrial white oil, so that the dispersion effect is good. It has good fluidity under hot-melt conditions and good fluidity for toner. Its brightness can be increased more than twice. The brightness of the product is like a mirror.