Aluminum sheet is one of the most widely used nonferrous metal structural materials in industry. It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry.

It is suggested to use universal adhesive

1. Base material treatment: for the surface dense and hard adherent, such as metal sheet, aluminum-plastic plate, ceramic tile, high-density composite board, etc., first remove the rust, stain, water on the surface of the adherent or slightly roughen it with sanding, then evenly apply universal adhesive on both sides of the adherent, and leave it for 8-20 minutes (extend the drying time in winter season). When the adhesive layer is dry, apply appropriate pressure, To make something stick together tightly.

2. Gelatinization: generally, one coat of gelatinization is enough. For porous stickies, 2-3 coats of gelatinization are required, and the next coat of gelatinization can only be carried out after the first coat of gelatinization solvent is basically volatilized. In order to prevent the residual pores of adhesive, it should move in one direction when brushing. The result of coating should ensure that there is no lack of adhesive on the surface of the adhesive, and the thickness is uniform. Generally, the thinner the adhesive layer, the smaller the defect, the smaller the shrinkage and the higher the bonding strength. If the adhesive layer is too thick, it is not beneficial, but harmful. Therefore, in the case of no lack of adhesive, the adhesive layer should be as thin as possible. Generally, the thickness of the adhesive layer should be controlled at 0.1-0.15mm, that is, the total amount of adhesive coating should be 200-300g / M2. Chu attack arm Ji earn panic braid reed sowing two

3. Airing: after gluing, it must be airing. The purpose of airing is to make the solvent volatilize clean and increase the bonding strength. Do not stack immediately. It must wait until the solvent volatilizes completely, so as not to make the adhesive layer stick or produce bubbles, resulting in the decline of bonding quality. Air time (8-15 minutes in summer, 20-40 minutes in winter), when the adhesive layer is dry film (when the hand touches the non stick hand), it can be bonded, and the air time should not exceed the opening time, so as to avoid the adhesive layer losing adhesion and affecting the bonding result.

4. Pressure: the initial adhesive force of universal adhesive is large, so when bonding, we must grasp the time, align the position at one time, and do not move back and forth, and after bonding, we should properly press and press, drive away the air, compact the adhesive layer, and improve the bonding quality