Skip links

GenNex PP 25

GenNex® PP25

Code: 3202

Download Safety Data Sheet
Download Data Sheet

GenNex® PP25 polypropylene primary insulation is a thermoplastic flame retardant primary insulation designed to perform in combination with fluorinated ethylene propylene (FEP) insulated pairs in a category style communication cable. The polypropylene flame retardant insulation serves to lower the cost of the final cable without impacting flame performance.


  • High flame retardancy
  • Excellent Electrical properties
  • Good Processibility


Density: 1.45 g/cm3
Tensile: 2000 psi (typical)
Elongation: 200% (typical)
Melt Index: 4.0 g/10 min.
Viscosity: 600 Nm


Dielectric Constant (DC): 2.84
Dissipation Factor (DF): 5.0 x 10‐4


Limited Oxygen Index (LOI): 36%

Cone Calorimeter (ASTM E1354):

  • Peak Heat Release (kW/m2) 153
  • Total Heat Release (MJ/m2) 34
  • Time to Flame Out (s) 555
  • Total Smoke Release (m2/m2)  1519


Extruder L/D: 20:1 or 25:1
Comp. Ratio: 3.0:1
Screen Pack: 20 mesh or none
Screw Type: Single Flight metering, without mixing section
Feed Zone: 320ºF
Screw Cooling: 165ºF
Gradient Cooling:  recommended
Center Zone:330-340ºF
Die Cooling: Not Recommended
Gradient Cooling: Recommended
Head/Die: 360ºF


The PP Primary material has been designed to process easily on standard extruders used in the production of wire and cable products. The material has been designed to process similar to standard Polyethylene or Polypropylene based materials. High compression screws without a mixing section are preferred. Melt Temperatures above 380ºF (195ºC) should be avoided. The material can be extruded at wall thicknesses of less than 10 mils with no issues.
Gradient cooling is recommended to maintain maximum elongation values after extrusion. The material is supplied as free flowing pellets, packaged in sealed foil lined boxes. Gendon recommends the material be dried prior to use in a standard desiccant style dryer for a minimum of 4 hours at 140ºF (60ºC) prior to use.

Similar products that might interest you

Genflam XLPO-2

Genflam XLPO-2

This fast Peroxide Curing Thermoset Flame Retardant Low Smoke Zero Halogen Compound was designed to provide the wire and cable field with a flame resistant jacketing compound.

Learn More
Genfil TP BC

Genfil TP BC

A zero halogen flame retardant cable bedding compound that was designed as a moisture proof barrier and filler for use in Low Smoke Halogen Free (LZHF) constructions.

Learn More
GenNex EU Ins

GenNex EU Ins

This compound has been designed to process easily on standard extruders used in the production of wire and cable products. The material is supplied as free flowing pellets.

Learn More