Panel A tests glue bonding to foam. Panels B & C show an alternate (better?) test that can measure the failure point of a PMF structure. Titebond rips off easily in panel A. In panel C the foam cracks and fails before the fabric rips off even when adhered with Titebond. If the foam fails, using glue that bonds the fabric better to the foam will not benefit. Nothing can be better than good enough.
