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Plate surface trapping

The surface of the aluminum-plastic plate has the collapse of the thumb print size, which is caused by the stiff knot of the polymer membrane. The stiff knot size of the polymer membrane, generally has the big rice grain size, assumes the white, belongs to the GUM layer quality question. These prominent particles in the compound, the air around the same as the above-mentioned bubble phenomenon can not be completely extruded, wrapped in the plate, when the stiff knot heated to dissolve with the plate layer bonding, but the air layer barrier to double directly affected, forming a trap. The quality of this material needs to be eliminated from material purchasing and production management.