How does aluminum honeycomb panel bond? Hot melt adhesive film??

　　aluminum honeycomb panelIt is a building material with excellent performance. It is light in weight, high in strength, and has good sound insulation and noise reduction functions. It is the preferred material for building decoration plates on some special occasions. So, what adhesive is used to solve the bonding of aluminum honeycomb panels? If the use of hot melt adhesive film can solve the bonding problem of aluminum honeycomb panels??

More traditional practice, the use of aluminum honeycomb panel bonding polyurethane adhesive Products. Polyurethane adhesives are well known and widely used for high strength bonding to metals. Now a lot of decorative building materials on the nail free glue, in fact, is a kind of polyurethane adhesive. It can be said that polyurethane adhesive is a very excellent performance of aluminum honeycomb panel adhesive.

The biggest problem with polyurethane adhesives is the slow curing speed, which usually requires room temperature curing for 24 hours to form a reliable bonding strength. If the temperature is low in winter, or in cold areas, the curing time will be extended to 48h. Such a curing speed greatly reduces the production efficiency of the aluminum honeycomb panel, and the use of hot melt adhesive film instead of polyurethane adhesive to bond the aluminum honeycomb panel can greatly improve the production efficiency of the aluminum honeycomb panel.

Hot melt adhesive film as an environmentally friendly adhesive Products, which in the heated state melts into liquid, infiltrates the surface of the adherend, cooling and hardening to produce bonding strength. As long as the hot melt adhesive film is completely cooled, it can form a reliable bonding, and it can be quickly cooled with cold pressing technology. The use of hot melt adhesive film bonding aluminum honeycomb panels, the production cycle of a plate from the original 1-2 days to 1-2 minutes, greatly improving the production efficiency of aluminum honeycomb panels.

The hot melt adhesive film commonly used in the production of aluminum honeycomb panels is PO type hot melt adhesive film. The special adhesive film for PO type aluminum honeycomb panels has strong adhesion to metal aluminum and high bonding strength. In addition, since the aluminum material of honeycomb shape is bonded, the actual bonding contact area is relatively small. This requires that the PO type hot melt adhesive film has good shrinkage resistance and can form a better package for the aluminum material itself, thus forming a stable bonding.

How to bond aluminum honeycomb panel?

First, room temperature curing process: first, the aluminum panel is made into box-shaped, arc-shaped and other shapes, and then spray glue, and then the honeycomb core and panel are laminated in sequence, apply appropriate pressure, and can be cured after one week at room temperature. If a hot press is used to heat up to less than 100 degrees for curing, it only takes a few hours to cure. Adhesive used by the general use of two-component polyurethane adhesive, two-component epoxy structural adhesive. The aluminum honeycomb panel produced by this process has poor adhesion and poor weather resistance. It can be used for indoor decorative partitions, but it is not suitable for outdoor use.

Second, the thermoplastic adhesive film continuous composite process: first, the aluminum panel and honeycomb core are stacked in sequence, and then they are fed into the plane side continuous composite machine in sequence. under the condition of pressure and heating, after a few minutes of compounding, the resulting aluminum honeycomb panel is cooled after pressure, and the resulting aluminum honeycomb panel has high flatness, weather resistance and adhesion.

Third, epoxy adhesive film process: first, the aluminum panel and honeycomb core are stacked in sequence, then they are fed into a hot press and heated to 150 degrees. after about 10 minutes of continuous compounding of the thermoplastic adhesive film, they can be taken out and cooled. Epoxy film on the epoxy modified resin and nylon or non-woven fabric synthetic film. The aluminum honeycomb panel produced by this process has high weather resistance, but the bonding layer is brittle, and the long-term vibration will cause delamination, which is not suitable for rail transit.