Dear researcher,
I do blown film extrusion of (HDPE / LDPE / LLDPE), and I would like to increase its the dart impact. how can we reach a value of 150g/mil?
What additives we can use to achieve that value?
What parameters in the extrusion process can we change to achieve our goal?
Thank you
Dear F. Madidi, the following documents provide major influencing factors on the dart impact. My Regards
https://www.researchgate.net/publication/244975927_Dart_Impact_Testing_of_Polyethylene_Film_Mechanical_Interpretation_and_Model
https://doi.org/10.1177/8756087911434184
https://data.epo.org/publication-server/rest/v1.0/publication-dates/20180523/patents/EP2984126NWB1/document.pdf
https://doi.org/10.1016/j.matlet.2019.126689
This property is strongly related to SCB and LCB issues of polyethylenes as well as many other solid-state properties. Thus, you should think about chemical and segmental features of base polymer rather than additive(s) and/or processing conditions. Blending with alpha-olefin copolymers would help to improve dart impact.
Good luck.
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