In the world of polyurethane manufacturing, quality control is paramount. One of the most perplexing and costly defects that producers face, particularly when working with based foam systems, is a phenomenon known colloquially as the "MDI Jade Crack."
Switch to a delayed-action or "thermolabile" amine catalyst. These catalysts are initially latent, allowing the mixture to flow and fill the mold before the gel reaction accelerates. Specifically, use a sparingly; too much trimer creates brittle isocyanurate rings (jade sites). mdi jade crack
When the too early, the polymer becomes rigid before the gas has fully expanded. The expanding gas literally rips apart the semi-rigid matrix, creating shiny, internal cracks. This is the mechanical genesis of the jade crack. In the world of polyurethane manufacturing, quality control