New, basic plastics materials—"new base polymers" as an engineer would say—are expensive to develop and only come along about once in a decade. But new processing methods such as co-extrusion make it possible to combine existing materials—for example, in the manufacture of UV-resistant polycarbonates. Coextrusion makes it possible to combine different plastic polymers, producing a variety of colors, clarities and modifications (such as flame retardance, impact strength and weatherability).
The process of extruding two or more materials through a single die with two or more orifices arranged so that the extrudates merge and weld together into a laminar structure before chilling.
The technique of extruding two or more materials through a single die being fed by separate extruders.
Film produced by forcing more than one layer of extrusion through a common die slot. Films have been produced having as many as 14 layers. Each layer imparts a specific quality to the total extrusion.
Two or more different materials simultaneously extruded into a composite film.
Process of creating a two-textured product with an expanded material, which is filled with a filling prepared separately and pumped from a holding tank into the expanded material at the die.
Method of manufacturing that combines various plastic polymers to produce a range of colors, clarities and modifications, such as flame retardance, impact strength and weatherability.
(or Co-ex film) is a multi-layer plastic film made by extruding two or more molten plastics and layering them together to produce a film on cooling. They are designed for many special-purpose packaging for flexible wraps, bags and pouches.
The process of combining two or more layers of extrudate to produce a multiple layer product in a single step.
Fabrication of a multi-layer film by pumping the various materials through separate extruders and then merging the extruded material into a common die assembly. These die assemblies are constructed to maintain distinct material layers with fusion occurring at the boundaries due to the pressures and temperature of the extruded material.