The continuous extrusion of micro-textured isotactic polypropylene (i-PP) film and its tribological properties are reported. As analyzed by scanning electron microscopy, a rectangular-semicircular micro-patterned die successfully produced extruded cast-films with hill-like micro-texture. Such films displayed static and kinetic coefficients of friction (COF s and COF k ) values of 0.247 6 0.028 and 0.245 6 0.003, respectively, for a steel fixture sliding along the micro-texture of the film. The equivalent COF s and COF k values for non-textured (NT) films were 0.369 6 0.036 and 0.340 6 0.024, respectively, confirming that textured films displayed a reduction in COF of about 30%. For textured and NT films sliding on textured films, the COF k values were even lower at 0.161 6 0.013 and 0.113 6 0.004, which represents about 20-40% reduction as compared with that for the NT-NT counterparts. Films coated with a silicone lubricant displayed COF s and COF k values of 0.334 6 0.042 and 0.099 6 0.012, respectively, for NT films sliding over lubricated NT films, and 0.426 6 0.031 and 0.063 6 0.006, respectively, for textured films sliding over lubricated textured films. The COF k values for textured/non-lubricated films approach those of NT/lubricated films, indicating that micro-textured polypropylene films may be used in environmentally sensitive applications where lubricants and fluorinated additives may not be used for reducing friction.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.