Compare free-rise and molded polyurethane foam density, understand overpack ratio, and review the mold and process variables used to set a production density target.
Jiacheng Dai 
Review mold-release application practices for polyurethane molding, including mold cleaning, thin and even coating, drying, temperature and material compatibility.
Jiacheng Dai 
Explore how mold temperature affects polyurethane surface cure, demolding and part quality, with setup checks and troubleshooting considerations for different processes.
Jiacheng Dai 
Review MOCA use in cast polyurethane elastomers, processing requirements, alternative curatives and the equipment changes involved in switching material systems.
Jiacheng Dai 
Learn how to establish an A/B mixing ratio from polyurethane material data, verify actual dosing, and trace ratio drift through temperature, viscosity and metering controls.
Jiacheng Dai 
Compare mechanical, high-pressure impingement, dynamic and static polyurethane mixing heads, and review how shot size, material behavior and process needs guide selection.
Jiacheng Dai 
Review polyurethane metering-pump selection criteria, including flow range, viscosity, temperature, pressure, repeatability, material compatibility and recirculation.
Jiacheng Dai 
Explore MDI applications in rigid foam, cast elastomers, footwear and composite molding, with grade-specific considerations for metering, mixing and curing.
Jiacheng Dai Review polyurethane foaming-machine tank requirements, including sizing, temperature control, moisture protection, agitation, recirculation and monitoring.
Jiacheng Dai 
Understand what limiting oxygen index measures, how it differs from other fire ratings, and how formulation and processing affect polyurethane test results.
Jiacheng Dai 
