Extrusion cast composite film
DATE：2021/8/25 8:50:37 / READ： / SOURCE：This station
Extrusion cast composite film
Extrusion cast composite film is to use an extruder T-die to cast a thermoplastic on other substrate films, and become a multi-layer composite film after being pressed by a cooling roll. In order to improve the extrusion of plastic The adhesion between the base film and the base film should be coated with AC agent (Anchor coating agent)
The production process of extrusion casting lamination is as follows: substrate film unwinding → back to the eye, coating AC agent and drying together with an extruder T-die casting PE, EVA or PP plastics, and at the same time on the laminating roll The same as the second base film, under the condition that the extruded plastic is the intermediate layer and the adhesive layer, it is hot-melt and pressed, and after cooling, it is wound into a three-layer structure packaging material. There are single-stage, double-stage and multi-stage forms of extrusion casting layering method, that is, two extruders or three extruders are connected in series on an assembly line, and the compound can be extruded and cast at one time. The multi-layer composite packaging film bag with more than three layers is an important base material for packaging. The bag box with 5-100pm thick aluminum foil and paper composite can be used for the packaging of butter, margarine, chewing gum, fertilizer, etc., the same as cellophane, P film Compound, can be used to pack cakes, medicines, and PE, supplies can also be used as a container, its physical and mechanical properties
Author：admin