What is an extrusion coating?

The extrusion coating is a process used to paint materials with a thin plastic layer by means of heat and pressure. This process is used to improve the durability and quality of the surface of paper, fabrics, aluminum foils and other plastic products. The coating is applied by pressure by injection molten plastic into the slot, which pushes the thin membrane of the plastic to the moving leaf of the recipient material. The combination is then cooled and compressed to create the end product. Depending on specific employment requirements, an extrusion coating can be used to shoot both sides of the product or even for the production of laminates.

Plastic -coated products made using techniques extruding coating are found in a large number of everyday applications. These include covered plate and paper products, woven fabrics covered for fertilizers and a number of chemical, food and pharmaceutical packaging materials. These plastic coatings can be used for purely aesthetic purposes, to increase the ductVrats and quality surface finish and for the production of aseptic packaging materials for sensitive or subject products.

The

process of extrusion coating consists of granulated plastic heating and pressure system similar to the injection system. This brings a constant stream of pressure, molten plastic on the head of the extruder equipped with a narrow slot series. Die pushes the thin film of the plastic on the substrate or the recipient's material because it is withdrawn from the role. The coated substrate then passes between the cylinder roller and the chilled cylinder. These two rollers ensure that the plastic coating is the right thickness and is cooled to solidify and adhere to the substrate properly.

plastics used for extruding coating are thermoplastic resins such as polyethylene, polypropylene and ethylene -vinylcetate. They lend substrates that are used to wind up a wide range of benefitsTeristics, which significantly extends the scope of their use. These include moisture resistance, hygienic contact barrier for products, reduced loss of product weight and heat sealing potential. The deployment coating holds several advantages over other processes, including easy double -sided coating, high speed speeds, without solvent and adhesive and thickness of the variable coating.

Extruded coating processes are flexible and allow a number of user -defined surface treatment and coating constructions. The substrates can be covered on both sides with ease and laminates consisting of alternating layers of various substrate materials and plastic are possible. The cooling roller surfaces can also be treated or stamped to give the coating of a matte, shiny or decorative surface.