In the process of using aluminium composite panels, if there is a problem of blistering on the surface of the panels,
what is the cause of this? We can find out from the aluminium composite panel manufacturer.
It is likely that the core plate extrusion with granular non-fusible material,
the average diameter of these non-fusible material to a certain extent, will be protruding from the surface of the core plate,
the composite will cause the plate surface bubble phenomenon.
When we peel off the aluminium-plastic plate will find that there are signs of poor bonding around the bulge,
the reason for this sign is that the bulge is in the roller press compound,
the air around the bulge part can not be completely extruded and sandwiched in the middle of the plate layer,
the very thin air layer blocked the full adhesion of the plate layer to.
These non-melt material may be plastic particles mixed in other impurities, there may be other plastic particles mixed in,
the melting point of these plastics is much higher than polyethylene,
in the screw barrel can not dissolve and was blocked in the stainless steel wire mesh sheet side,
when gathered to a certain extent will cause the extrusion back pressure to rise,
so that the top broke the screen together with the extrusion caused by the core plate bubble.
If the particle size of the non-melt is too large, it may be stuck in the mouth die,
so that the surface of the extruded core board forms deeper marks,
which will also cause quality problems on the surface of the aluminium-plastic board.