Increase the amount of glue can solve the problem of composite plating aluminum film appearance?

To the problem of composite film appearance now commonly used method is to increase the amount of glue ( Be in commonly 2. 5~3g/m2） , but the greater the amount of glue, curing adhesives produced in the process of internal stress is larger, and the easier it is to intensify the transfer of aluminized layer, at the same time the appearance of the aluminum plating film and also a printing process has much to do. In reality, a lot of color printing flexible packaging factory in the production of each workshop is responsible for each workshop, printing of just printing is unqualified, in order to reduce costs, ink as far as possible to find cheap to use, it'll be easier to late composite process cause trouble. And composite process in order to ensure good appearance, you want to increase the amount of glue, and a transfer aluminized layer, finally can't, had to go to the so-called aluminized special glue. So, finally the overall cost. Some of the color of the master, in response to the procurement of low-quality cheap ink, are all in the palm white ink printing two times. So, where is the cost savings? Regardless of printing, single, from the perspective of composite solve the problem of the appearance of the composite plating aluminum film, the first is to choose a good flowing property adhesive, and choose the number of contour anilox roll as far as possible, and then determine the corresponding working liquid concentration and viscosity, which is make the working liquid concentration, viscosity and anilox roll the line number of the three coordinate, by any one of the three alone, can well solve the problem of appearance. And rely on experience of practice, to judge whether the size based on what the white dots, will disappear after curing, we have put the question to a curing process, risk is too big! Plating aluminum composite membrane wrinkling problem there are two kinds of wrinkling phenomenon, one is off the plane. This phenomenon is due to the viscous force is too low in the early of the adhesive, with good working liquid can be placed for a period of time ( Around 30 min) Then use would be much better. Has not, the second is the plane of curing room after 1 ~ 2 h, this phenomenon is commonly caused by tension control is not good, also want to consider the tensile deformation of thin film size! And, in the process of composite membrane deformation is the most severe place between composite hot roller and roller pressure, so enterprises should pay special attention to.