Production and Characterization of Doum Palm Shell-Recycled Low-Density Polyethylene Composite as an Alternative Material for the Production of Crash Helmet. MJCEHS [Internet]. 2026 Sep. 13 [cited 2026 Sep. 18];1(1). Available from: https://mjcehs.maaun.edu.ne/journal/index.php/app/article/view/5