Sometimes when using butyl tape construction, such problems will be encountered. The extrusion temperature control is appropriate, but the adhesion between the aluminum spacer and the butyl sealant is not good or the adhesion is poor. The reason for this problem is that the aluminum spacers or conveyor belts are not clean and have oil and dust; the belt is conveyed too fast, and the aluminum spacers are too late to apply glue; the aluminum spacers are skewed, the glue mouth is not easy to pass or the glue position is incorrect; sealed The initial viscosity of the glue itself is poor. So what is the processing method of aluminum spacers and butyl tape?
Solution: Clean and calibrate the aluminum spacer and the conveyor belt, adjust the speed of the conveyor belt; adjust the gap between the two glue nozzles according to the proportion; the aluminum spacer frame should be placed vertically when coating to prevent the glue nozzle from passing easily or glue Non-sticky phenomenon of aluminum spacer caused by incorrect position; butyl sealant is both elastic and viscous elastomer, which is extruded and adsorbed on clean aluminum strip by suitable temperature and pressure, melted butyl tape The surface of the adherend diffuses and gradually wets the surface of the adherend and penetrates into the surface pores. This is a physical process. In this process, the butyl tape and the adherend (aluminum strip) are only in line contact between the surfaces, only Only after being pressed can surface contact be made with the adherend. Therefore, the appropriate construction pressure and temperature are conducive to this process. It is worth noting that it takes some time (3 ~ 5MIN) for the glue to absorb the aluminum strip to achieve the best adhesion effect.