Gel spot quality analysis of small hollow blow molded products by high density polyethylene resin
The gel spot of small hollow blow mold-ed products by high density polyethylene(HDPE)special resin was a key problem that restricted the improvement of product quality.The gel spots in small hollow HDPE special resin extrusion blow molded bottles(mainly 1-5 L machine oil bottles and antifreeze bottles)were analyzed by polarizing microscope,differential scanning calorimeter,gel chromatograph,infrared spectrometer and other in-struments,and improvement measures were pro-posed.The results showed that the gray blow molded products with color masterbatch added in HDPE special resin had high defect rate of gel spots,which was due to the poor dispersion of TiO2 to form aggre-gates,which led to uneven local stretching of HDPE in the extrusion process,resulting in gray gel spots.It was recommended to choose appropriate color masterbatch to ensure uniform dispersion of TiO2,thereby improving the quality of small hollow special resin blow molded products.
high density polyethylene resinsmall hollow blow molded productcolor masterbatchgel spotTiO2
万方数据
维普
