The film starts off on the lower film coil, then the film is carried by clamps between two chains until it reaches the forming area. There the pack is heated and pushed against a mould where the container is formed; once it has cooled it moves on to the loading zone to fill the pack with product. When the pack has been filled it then moves on to the vacuum area where a top film layer is placed to create a seal, then the vacuum-gas and sealing of the layers can start.
Once the package is sealed it moves to the transversal cut taking out in one or two lots, of all the containers of a same cycle, then the longitudinal cut is done, and the containers are separated individually.
Is considered flexible film, if the thickness of it does not exceed 300 microns, that means 0.3mm. This film is usually used for vacuum containers, since the film is pressed against the product. It is also possible to use with gas inside the container. This film can be formed with the shape and measurements of any product.
Is considered semi-rigid, if the thickness is between 300-500 microns, this means 0.3 - 0.5mm.This film can be formed with the shape and measurements of any product. Should bear in mind that when a bigger depth is used the bottom of the container is weaker; it is usually recommended for a depth of 0-50mm. The container stiffness depends on the type of film used. ( consult with film manufacturer.)
Is considered rigid film of the thickness has exceed the 500 microns, that means, 0.5mm. With this film you will get more consistency and depth. Should bear in mind that when larger the depth is, more equipped the machine has to be for heating and pre-heating power to maintain the product output.
These machines are designed elecrtonically and mechanically to do 11 cycles/minute with the vacuum-sealing process. However the speed will depend on;