Feedblock method multilayer film molding has the following advantages:
・The cartridge system allows for the replacement of each resin layer in a short time. ・The flow path is not split in half even when disassembled, so the internal parts are less likely to be damaged and disassembly and cleaning are easy. ・It can be manufactured more cheaply than a multi-manifold. ・It is more compact than a T-die and is easier to handle. It can be attached to a dedicated T-die for a feed block, regardless of lip width (the inlet should be aligned with the oval outlet of the feed block).

<Disadvantages>
・The thickness ratio of each resin cannot be precisely controlled. If there is a large difference in viscosity between the resins, the flow path after they join will be long, resulting in variations in the thickness ratio. ・Many blocks are combined in a complex manner, resulting in frequent resin leakage. ・The resin flows around the outside of the cartridge and joins not only where the resins join, but also in other locations, causing defects in the film product. ・Since the flow paths are often square rather than round, resin accumulates in the corners. It can be difficult to apply chrome plating to flow paths (this can also be the case with Kanigen plating).

The following characteristics are mentioned,
We have adopted a design method that takes advantage of the advantages while minimizing the disadvantages as much as possible.