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Millad NX 8000E for blow molding
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Millad NX 8000 for blow molding is a clarifying additive for polypropylene (PP) tailored for use in the extrusion blow molding (EBM) process. It has been designed to provide a step change in optical properties with standard Ziegler-Natta polypropylene EBM resins, enabling PP to replace more expensive, less functional, or difficult to process materials. The performance of Millad NX 8000 for blow molding can be optimized by finetuning the rheology of the PP base grade. This leads to PP bottles having outstanding clarity and superb gloss inside and out, lower haze, and a low yellowness index. Benefits:
In blow molding, the high clarity of NX UltraClear PP makes this material an innovative replacement for polycarbonate in baby bottles and an attractive alternative to polyethylene terephthalate (PET) in personal-care bottles and detergent bottles. NX UltraClear PP makes it is possible to integrate handles, include soft-touch properties, and create complex, eye-catching designs in a blow-molded bottle that is also easier and faster to empty than other solutions.
How Millad® NX® 8000 Works
Normal PP
As the polypropylene crystallizes from the melt, complex macro-structures known as spherulites form. These are responsible for scattering light and their size dictates the polymer’s optical and physical characteristics.
Nucleated PP
To improve clarity, the spherulite size must be reduced. Insoluble nucleating agents are used, but their effectiveness is limited as the nucleator itself causes a haze and their insolubility leads to non-uniform dispersion.
Clarified PP
Millad NX 8000, clarifying agent solubilizes in the molten polypropylene and precipitates from the melt upon cooling, to form a fibrous network whose surface becomes the nucleation site for the PP. This surface creates a very high nucleation density, forming tiny crystallites that are too small to scatter light. The fibers themselves are also too small to scatter light.
Why choose Millad NX 8000?
Traditional clarifiers require a minimum temperature of around 220°C before they will dissolve in PP. At this temperature, the fibrous network is not properly formed, preventing high transparency. Millad NX 8000 has improved solubility characteristics in PP which allow processing at lower temperatures. This creates a broader, more robust processing window and a dramatic improvement in the clarity of polypropylene.