I have checked thermocouples and verified with another thermocouple and readout. We have found that checking with an IR sensor with barrel heaters is somewhat difficult because of the surrounding heat and reflective material.
The blowing agent is a masterbatch that is added in at 1.6% to LDPE...
We are trying to run a solid foam LDPE cord extrusion using a 4-strand die and sizer. The part is 5/32 diameter and the foam is medium density made from a chemical foaming agent in a single screw extruder. We had no problems running the sample for our customer and now that we are running...