Addressing High Edge Core Density Differential in Continuous PU Sandwich Panels with Pentane Blowing System

PU Insulated Panel Core Burning: Causes and Solutions

If your factory production line is running at full capacity, yet when you cut open the panel, what you see is not uniform off-white or light yellow foam, but striking dark red, brown or even charred black foam — this is what we commonly refer to as "core burning" in the polyurethane industry.

Tiny pinholes all over the car seat foam! What's going wrong?

During the production of car seat foam, tiny pinholes often appear on the surface, which is a common defect in the industry. This issue doesn’t affect the foam’s internal rebound, but it can ruin the smoothness of the surface, causing defects in later covering or painting processes, and directly lowering product yield. The main cause of pinholes is that the foam cures faster than the gases can escape, trapping air and reaction gases in the surface layer, which then harden into tiny holes. This usually happens at four key process points.