Reprapper Polypropylene PP Filament, Semi-Flexible Ultra Tough 1.75mm 3D Printer Filament for 3D Printing (± 0.03mm) 2.2lb (1kg), 5pcs Build Sheet

The Reprapper Polypropylene PP Filament has garnered a mixed reception among its users, primarily highlighting its challenges as a specialized material for 3D printing. While it is noted for being semi-flexible and offering a degree of toughness, several reviewers have pointed out significant issues regarding adhesion and warping during the printing process. Specific structural shapes tend to exhibit pronounced curling or warping, which can compromise the integrity of prints, particularly with flat objects. In some cases, users have managed to resolve adhesion issues by utilizing specific adhesive tapes on the print bed, although this workaround suggests foundational issues with the filament's compatibility with standard printing setups. Furthermore, there are concerns regarding the quality of the filament itself. Reports indicate that it can contain metal contaminants, leading to severe clogging in nozzle systems like Bondtech BiMetal CHT nozzles. This not only results in additional costs due to the need for replacement parts but also erases trust in the filament’s reliability. Users expecting a performance in line with traditional injection-molded PP might find this filament too soft for their needs, making it less effective for prototyping or testing applications where precision and durability are paramount. Overall, while the Reprapper PP Filament may offer some advantages for certain specific applications, an array of complications—including significant print failures due to adhesion issues and detrimental effects on high-quality nozzles—highlights potential risks for those looking to incorporate it into their 3D printing processes. **