Why Your PVC Edge Banding Starts Peeling After 6–8 Months in Humid Workshops (What a Songjiang Mill Test Actually Showed)
I’ve spent twelve years walking factory floors around Shanghai, mostly fixing the same edge-banding failures that keep showing up on the same kinds of boards. The complaint is almost always the same: the PVC looks fine when it leaves the line, then six to eight months later the corners lift, the seam opens, and the customer starts sending photos. In our climate that pattern is rarely a mystery once you measure the substrate and watch how the adhesive actually behaves under real humidity.