PE系列的三层共挤自粘膜配方问题,现将有关配方设置和注意事项发表如下(注意:此贴是网上查找的,实际效果还待实践);

      1,外层:          C6/C8LLDPE                 80KG;

                            mLLDPE                        20KG;

                            PIB                             2 --4KG.

 

      2,中层:         EVA                             60kg

                           C6/C8LLDPE               40KG;

 

      3,内层:            C6/C8LLDPE            80KG;

                               LDPE                         20KG;

                               防雾剂                       1.5kg.

      4,层次比例为30/40/30,分别为自粘层,过渡层和内层防结露层.

      5,配方中增粘剂(PIB)及防雾剂,应分别制成母料后加入.

      6,工艺条件:

              挤出机的长径比为                                       25-28;

              挤出机加热温度                     加热段          150度;

                                                              塑化段          180-190 度;

                                                             计量段             200-210度;

             摸头加热温度                                              210-220度;

             口模间隙                                                      1.2-1.5mm;

             吹涨比                                                           2.5-3;

             膜卷贮藏温度                                               10-40度;

注意事项:晶点问题和不透明问题和螺杆转速和口模加热温度有关,一要将转速逐步提高到60-70左右,口摸加热温度保证在200以上调整.
 


 

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