Polyurethane Coating and Wet Coagulation Systems
category
Polyurethane coating and wet coagulation systems apply solvent-based polyurethane solutions to textile substrates and coagulate the PU through controlled immersion in water baths that precipitate the polymer in a microporous structure as solvent diffuses out and water diffuses in, producing the waterproof breathable microporous polyurethane coatings and artificial leather substrates used in performance outerwear, footwear, and upholstery applications.
Role
Produces the microporous polyurethane coating structures that combine waterproofing with water vapour permeability through the wet coagulation phase inversion process that creates interconnected microscale pores during polymer precipitation, enabling the production of waterproof breathable fabrics and artificial leather materials with the breathability, flexibility, and surface quality required for premium performance outerwear and footwear applications.
Subtopics
- PU Solution Preparation and Solvent Systems Polyurethane coating solution preparation dissolves PU polymer at 15 to 35 percent solid concentrati…
- Wet Coagulation Bath Design and Control Wet coagulation baths immerse PU-coated fabric in water or water-DMF mixtures at defined DMF concent…
- Solvent Recovery and DMF Recycling Systems DMF recovery from PU wet coagulation washing water uses vacuum distillation or multi-effect evaporat…
- Artificial Leather Production on Wet Coagulation Lines Artificial leather wet coagulation lines apply multiple PU layers of different formulations onto wov…
- Post-Coagulation Washing and DMF Removal Post-coagulation washing removes residual DMF from coagulated PU-coated fabric through multi-stage c…
- Waterborne PU Coating as DMF-Free Alternative Water-based polyurethane dispersion coating applies aqueous PU at 30 to 50 percent solid content by …
- Embossing and Surface Texture Application Artificial leather and coated fabric embossing uses engraved steel rolls with defined grain patterns…
- PU Coating Performance Testing and Characterisation PU coated fabric performance characterisation measures hydrostatic pressure resistance by Suter test…
- Microporous Structure Analysis and Optimisation Microporous PU coating structure characterisation uses scanning electron microscopy of cross-section…
- Continuous Coagulation Line Speed and Productivity PU wet coagulation line productivity is limited by the coagulation bath dwell time required for comp…