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What are the common quality problems in the Aluminum Composite Panel’s lamination process?

When Aluminum Composite Panels are used to decorate the surface of buildings, there are generally gaps of a certain width between the plates. For aesthetic needs, black sealant is usually filled in the gap. In order to save time, some construction workers do not need paper tape to ensure the neatness and regularity of the glue, but instead use the protective film on the surface of the aluminum-plastic board as a substitute. Because the protective film will tear to different degrees when cutting aluminum-plastic panels, it is impossible to use the plastic film as a substitute for protective tape to tidy up the glue seams.

Common quality problems and solutions in the process of aluminum-plastic composite

There are two main quality problems that often occur in aluminum-plastic panels, one is the coating quality; the other is the composite quality. Coating quality problems occur in the pretreatment of aluminum plates and in the process of painting and baking. The composite quality problems are mainly technical problems and management problems in the composite process. Some of these problems are affected by a single factor, and some are affected by multiple factors. The quality problems in the composite process of aluminum-plastic board mainly include board surface blisters, board surface spots, lotus leaf edges, and poor bonding. The following are analyzed and discussed separately.

Board bubbling

The bubbling of the aluminum-plastic board surface is that the core board is extruded with granular infusibility. When the average diameter of these infusible substances is large enough, it will protrude from the surface of the core board, which will cause the board surface when compounded. Bubbling. When we peel off the aluminum plate, we will find that there are signs of poor adhesion around the bubble. The reason for this sign is that when the bubble is in a roll compound, the air around the bubble cannot be completely squeezed out and pinched. In the middle of the plate, a very thin layer of air blocks the full adhesion of the plate. These infusible substances may be other impurities mixed in plastic particles, or they may be mixed with other plastic particles. The melting point of these plastics is much higher than that of polyethylene, which cannot be dissolved in the screw barrel and is blocked on the side of the stainless steel wire mesh sheet. When the aggregate reaches a certain level, it will cause the extrusion back pressure to rise, so that it will burst through the filter screen and be extruded, which will cause the core plate to bubble. If the particle size of the unmelted material is too large, it may be stuck in the die, which will cause deeper imprints on the surface of the extruded core plate, which will also cause quality problems on the plate surface.

For the production of thin plastic plates, it is necessary to use a certain number of layers of stainless steel wire mesh for filtration. For aluminum-plastic core plates, it is possible to use a perforated plate with a certain aperture that is much smaller than the plate thickness, which will not cause puncture. Solve the bubbling problem.

Plate spot

Aluminium Composite Panel Sheets for Construction has the size of thumbprint collapse, which is caused by the rigidity of polymer film. The size of the polymer film is different, and it is generally the size of rice grains, which is white, which is a quality problem of the glue layer. When these protruding granules are compounded, the surrounding air cannot be completely squeezed out like the above-mentioned bubbling phenomenon, and they are wrapped in the board. When the rigidity is heated and melted, it can be bonded to the board layer, but there is an air layer barrier The area is doubled and directly affected, forming pits. The quality of this material needs to be eliminated from material procurement and production management. We are Aluminum Composite Panels Factory, welcome to consult.