Layered injection molding is a molding process that combines the characteristics of co-extrusion molding and injection molding, which can arbitrarily produce a very thin layered state in complex parts.
Layered injection molding simultaneously performs two different resin injections, which are layered in a co-extrusion die through a multi-stage co-extrusion die, and the thickness of each layer is thinned and the number of layers is increased. The injection mold cavity is superimposed, and the layered morphology obtained by the above process is retained, that is, the two tree fingers are not present in a disorderly blending state along the thickness direction of the product, but are compositely superposed.
It has been reported that layered injections can form articles having a thickness of 0.1 to 10 pm per layer and thousands of layers. Due to the layered structure, the characteristics of each component material are retained, and the material properties can be fully utilized compared with the conventional blending materials, so that the products have outstanding advantages in barrier gas full penetration, solvent resistance and transparency.