Wuhan Handern Co-extrusion Compound Technology

日期:2020/9/23 8:42:08 / 阅读: / 来源:本站

Wuhan Handern Co-extrusion Compound Technology

        The co-extrusion composite process is a lamination process that uses two or more extruders to share a composite die to produce multi-layer composite packaging films and sheets. Its characteristics are: www.handern.com Laminating Compound Machinery
       (1) There is no need to use adhesives or AC agents. Therefore, there are no problems with products and solvent pollution caused by adhesives and AC agents;
       (2) In terms of product price, co-extruded composite film is the lowest cost of composite film; www.handern.com Laminating Composite Machinery
       (3) The choice of base film is more narrow. Only the resin with good compatibility can be used to produce composite film by co-extrusion. Incompatible materials must use the same two mutually incompatible resins. A compatible compatibilizer can be used as an intermediate layer to be firmly bonded together. In fact, it can only be used for lamination between thermoplastics and thermoplastics;
       (4) Co-extruded composite films can only be printed on the surface. In the production process, the co-extrusion composite process has two types: co-extrusion round die method and co-extrusion composite T-die casting method. The round die co-extrusion blows out the inflated multi-layer co-extrusion film, and the T-die extrudes the co-extrusion cast film. www.handern.com Laminating machine
        The production process of the circular die co-extrusion inflation multi-layer film is as follows: two or more extruders feed separately → composite circular die co-extrusion → composite multi-layer film inflation → air ring Cooling → herringbone inflated film bubble leading film, bubble extinguishing roller pinch film to extinguish the bubble → cutting → corona treatment → winding. Blowed film always has a slow cooling rate, so the production speed can only be 30-60m/min. The more effective co-extrusion composite process is T-die flow co-extrusion of multi-layer films or sheets, which can produce door spokes Wide; the film thickness uniformity is good, the error is small; the production speed is high, up to 100-150m/min. A very important requirement in the co-extrusion compounding process is to have good thermal adhesion between various resins, that is to say, there must be good compatibility in order to form a composite film with good composite fastness. www.handern.com Laminating machine


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