Co-ex die enables novel multiple layer combinations

Brampton Engineering’s six-layer ISO-therm SCD (Streamlined Coextrusion Die) enables processing of materials that are extremely sensitive to degradation such as PVDC at the same time as nylon, or a rubberized polymer with a low temperature adhesive. The ISO-therm SCD now makes it possible and practical to use these materials in a co-extrusion structure. Until now it has been impossible to process these materials at the same time, because heat migration within the die caused viscosity changes and degradation. Now with ISO-therm dies it is possible to maintain temperature differences between adjoining layers of up to 150 C. The melt temperature of one material is not affected by the temperature of another material. The ISO-therm SCD incorporates space-age insulating materials and removes or adds heat to the critical module distribution plates and helps maintain the preset, ideal temperature for that module.

Brampton Engineering Inc. 905/793-3000