Preperse PP-S grade is a group of organic pigment preparations recommended for coloring polypropylene applications request outstanding performance of dispersion that presented by filter pressure value (FPV). For example, Preperse PP-S grade can be used in mono masterbatch of polypropylene filament and fiber, which requires minimum FPV below 1.0 bar/g under a testing condition of 1400 mesh filter.
Preperse PP-S pigments are also in granular type. They are dust-free, free-flowing and suitable for auto-feeding.
In order to achieve the FPV requirement for severe applications, twin-screw extruder and making mono masterbatch is necessary. The common FPV of Preperse PP-S grade is ≤ 0.8 bar/g, based on below condition： Mesh number: 1400; Pigment content involved: 60g; Pigment % to resin: 8%. Above data refer to mono masterbatch made by twin-screw extruder.
