PROBLEM IDENTIFIED BY THE CUSTOMER
Once filled, the container / filter undergoes a second processing stage during which it is inserted into an additional paper package. It is during this part of the process that the heating elements used in the bag closing process perform a series of seals around the perimeter of the package. One side of the package is folded back on itself while the remaining 3 sides are heat-sealed by a mechanism fitted with two Cartridge Heaters. The solution used by the customer did not provide a sufficiently uniform heat distribution to achieve a perfect seal. The temperature jump between one point and the other of the seal was 30°C.