Aluminum-plastic Panel Surface Bubbling Problem

Aluminum-plastic panel surface bubbling is the core plate extrusion with granular non-melt, these non-melt average diameter to a certain extent, will protrude on the surface of the core plate, composite will cause the board surface bubble phenomenon. When we peel off the aluminum plate, we will find that there are signs of poor adhesion around the bubbling, and the reason for this sign is that when the bubbling is laminated, the air around the bubbling part cannot be completely squeezed out and sandwiched in the middle of the plate layer, and the extremely thin air layer blocks the full bonding of the plate layer. These non-melts may be other impurities mixed in plastic particles, or may be mixed with other plastic particles, the melting point of these plastics is much higher than that of polyethylene, and can not be dissolved in the screw barrel and blocked on the side of the stainless steel wire mesh sheet, when gathered to a certain extent, it will cause the back pressure of the extrusion to rise, so that the top of the filter is extruded together to cause the core plate bubbling. If the particle size of the non-melt is too large, it may be stuck in the mouth mold, causing deep imprints on the surface of the extruded core plate, which will also cause quality problems on the board surface.
For the production of thin plastic plates, it is necessary to use multiple layers of a certain number of stainless steel wire mesh for filtration, and for the aluminum-plastic core board, a certain aperture of a certain aperture is much smaller than the thickness of the board to filter without causing puncture, and generally can solve the bubbling problem.