Shanghai Daoqin Plastics Co., Ltd.

         polypropylene (PP) (PP) is types semi crystallization type polymer, tool has excellent force property can, to application. in PP more type in α晶 type is most Common and most stability type, is this type of type dimensions large, 导致PP transparent property can relatively 差. another, PP链 structure in carbon for oxygen relatively is 敏感, easy oxidation formed 自由基, in light or hot processing 时PP products easy 发黄. this defect made PP in transparent material field/area application. in addition PP as is packaging materials 时往往 also need tool has excellent anti-aging property can, ensure product quality. therefore in improve/increase PP transparent property meanwhile, maintain material anti-aging property can is important.

         currently, improve/increase PP transparent property methods main/primary is add nucleating agent. high active property nucleating agent main/primary 包括取代芳基 has machine acid type and alcohol type has machine nucleating agent. although market upper nucleating agent types type more, main/primary also is increase 透, reinforcement type nucleating agent is 主. mono add nucleating agent PP不足以 meet/satisfy transparent products types type day increase more demand, has multiple add property can modified PP research research 人员青睐. large and other through dispersant, antioxidant, research composite/compounding additives for iPP/ nucleating agent NA–11 (NiPP)材 material anti-aging property can, transparent property and crystallization is effect/influence, discussion its in PP modified in function.

         main/primary Raw Materials

        iPP: T30S, China 石油兰州石化 company;

         nucleating agent: NA–11, Japan ADEKA company;

         antioxidant: 1010, 168, BASF company;

        复配 antioxidant: B215, BASF company;

         dispersant: di hard acid amine (EBS), pure degree >95%, 苏州联胜 chemical has company;

         dispersant: polyethylene (PE) (PE) wax (CH–10), 广州顺德亚宇 plastics additives 厂.

         sample made 备

         will 0.2份 nucleating agent, 0.5份 antioxidant, 0.1份 dispersant and 100份iPP粒 material in high speed mixed combined machine in uniform mixed combined. in di screw extrusion machine in extrusion pelletizing, extrusion machine screw temperature degree: Ⅰ区170℃, Ⅱ区175℃, Ⅲ区180℃, Ⅳ区185℃, Ⅴ区190℃, Ⅵ区195℃, Ⅶ区200℃, Ⅷ区215℃, machine temperature degree 210℃. screw speed is 200 r/min.

         will extrusion iPP粒 material in gas in drying 48 h, in injection molding machine in injection molding, injection molding process parameters is: injection temperature degree 200, 190, 180℃, injection speed rate 95%, injection molding pressure 50%, cooling time 20 s. injection molding standards force property can Sample used for force property can testing, injection molding transparent sheet/plate used for degree testing, transparent sheet/plate dimensions is 50 mm×50 mm×1 mm.

         property can summary

        (1)添 add EBS as is dispersant 时, NiPP材 material degree increase 34.8%, heavy effect/influence material transparent property can. versus ratio EBS, PE wax as is dispersant 时, NiPP材 material degree increase 7.4%, and NiPP材 material force property can maintain relatively good.

        (2)三 types antioxidant for NiPP材 material crystallization property can effect/influence relatively small. add antioxidant 1010 for NiPP材 material optical property can effect/influence most heavy, antioxidant 168次之, composite/compounding antioxidant B215 most small. 经 35 d hot oxygen aging rear, add antioxidant 1010 NiPP材 material anti-aging can force most good, composite/compounding antioxidant B215次之, antioxidant 168 most 差.

        (3) selection dispersant PE wax, antioxidant B215 and has machine acid salt nucleating agent NA–11组 formed composite/compounding modifier, not only can maintain NiPP材 material transparent property can, also can its excellent anti-aging property can. NiPP/ PE wax /B215材 material degree is 15.0%, light transmittance is 67.2%, 经 35 d hot oxygen aging rear material tensile strength maintain rate is 83.75%, flexural strength maintain rate is 81.36%, notched impact strength maintain rate is 72.32%.