Non-solvent induced phase separation (NIPS) makes it possible to spin hollow fiber membranes with a thin selective skin and a supportive porous substructure—at industrial scale. This article explains the core modules of a modern NIPS hollow fiber spinning line, shows how configurations differ for environmental filtration, medical dialysis, and gas separation, and closes with a practical FAQ.

Thinfilm composite (TFC) reverse osmosis (RO) membranes are built layerbylayer: a porous support film cast by phase inversion and an ultrathin aromatic polyamide active layer formed by interfacial polymerization (IP).

Thermally induced phase separation (TIPS) turns a hot, homogeneous polymer–diluent solution into a finely tuned porous hollow fiber as it cools and crystallizes.

Non-solvent induced phase separation (NIPS) enables scalable manufacturing of hollow fiber membranes with finely tunable selective skins and robust porous substructures. These fibers serve as compact, high–surface-area platforms across environmental filtration, hemodialysis and blood-contact devices, and gas separation processes.

Hollow fiber ultrafiltration (UF) membranes derive their performance from microstructure, and that microstructure is governed by phase-separation dynamics during spinning.

Reverse osmosis (RO) flat-sheet coated membranes are the quiet engine behind desalination, ultrapure water, pharmaceutical fluids, semiconductor rinsing, household purification, and closedloop water recovery.

This article traces the arc from early theory to modern production lines—and explains what matters when specifying TIPS hollow fiber equipment for these fields.

Non-solvent induced phase separation (NIPS) hollow fiber membranes convert polymer science into compact, high-performance separation modules. From municipal water polishing and membrane bioreactors, to hemodialysis and artificial lung devices, to oxygen/nitrogen enrichment and solvent dehydration, these fibers deliver large surface area in small footprints with tunable selectivity and durability.

Ultrafiltration hollow fiber membranes owe much of their performance to how they are formed at the spinneret. In NIPS (non-solvent induced phase separation) and TIPS (thermally induced phase separation) lines, the spinneret is the control point that converts rheology, flow balance, and interfacial kinetics into pore architecture and mechanical integrity. Choosing a production route is not about perfection; it is about matching polymer system, pore targets, and throughput to a spinneret and line design that deliver stable, reproducible fibers.

Hollow fiber membranes have really been making waves in the filtration world lately. Companies like Memstar and Koch Membrane Systems are definitely leading the charge with this tech. But here’s the thing—how well these membranes work really depends a lot on the manufacturing process used during spinning. So, it’s a good question: what production methods are actually best suited for making hollow fiber membranes?

Hollow fiber membrane spinning is a critical step across many manufacturing processes, especially in water purification, biotechnology, and gas separation. This underscores the importance of understanding which production methods actually use hollow fiber membranes.

The hollow fiber membrane industry for water purification and wastewater treatment relies on stable, efficient NIPS wet spinning. Trustech’s FCT 6th Generation Spinneret is the core forming component designed specifically for wet-process NIPS. Building on Gen5 strengths—independent spinneret core, pinless structure, and high-precision forming—Gen6 adds structural innovations for multi-hole expansion and per-hole independent control, supporting 8, 12, 16-hole configurations. During spinning, each hole’s dope (membrane-forming feed) and bore fluid (lumen-forming) can be switched on/off and regulated independently, eliminating the traditional pain point of “entire line stoppage due to a single-hole failure.” This is particularly valuable under unstable materials or large process fluctuations, boosting productivity, reducing waste and labor costs, and enabling large-scale manufacturing..