Melt Spinneret

Melt Extrusion Spinneret, also called melt Spinning Spinnerette is a core precision component in melt-spinning processes. It forces high temperature polymer melts (e.g., PET polyester, PP polypropylene, PA nylon, PI polyimide) through micro-fabricated orifices under high pressure, typically with diameters from tens of micrometers up to a few millimeters, to uniformly extrude continuous filaments, fibers, or films. Its design must address three key challenges: uniform distribution of the high temperature melt, precise shaping and control, and resistance to corrosion and wear.

The rib-reinforced hollow fiber membrane spinneret, also called Core Fiber Reinforced Spinning Spinneret is a specialized spinneret assembly used for preparing hollow fiber membranes via non-solvent induced phase separation (NIPS). Based on conventional coaxial and multiphase spinneret structures, it adds a reinforcement filament introduction and positioning channel, which can stably introduce one or three high strength fine filaments (e.g., nylon/monofilament fishing line) into the membrane wall or at specific radial positions at the moment of fiber formation. The reinforcement filaments co-form with the membrane matrix in the coagulation bath, significantly improving tensile strength, anti-knotting, anti-brittle fracture performance, and resistance to operational stresses, without compromising the membrane's separation performance or hollow structure.