Crastin® and SiMB for Wire and Cable Applications

Article | Mar, 25 2021
Crastin® and SiMB for Wire and Cable Applications

DuPont™ Crastin® for optical fiber cable applications

Crastin® 6129 NC010

  • High viscosity PBT (MFI= 10 g/10min) 
  • Low shrinkage + post shrinkage behavior, low CLTE (Coefficient of Linear Thermal Expansion)
  • High mechanical properties, high impact resistance at low temperature

Crastin® 6130 NC010

  • Medium viscosity PBT (MFI= 15 g/10min)  
  • Better flowability than the Crastin® 6129

Crastin® S600F10

  • High viscosity PBT, internally lubricated (MFI= 10 g/10min) 
  • Good mechanical properties with high elongation at break and good low temperature impact resistance


The benefits of using Crastin® for optical fiber cable

Stable manufacturing processes

  • Maintains tubes’ OD/ID (dimensions)
  • Fast Line Speed
  • Fast start up

Materials mechanical properties allow thin wall constructions and good kink resistance

  • High Flexural Modulus & Elongation at Break
  • Low temperature impact resistance

Low signal attenuation

  • Isotropic Shrinkage, low post shrinkage & CLTE

Consistent performance to Hydrolysis and stress cracking resistance

  • Long lasting performance thanks to product quality and durability

Silicone Master Batch (SiMB) for wire and cable HFFR compounds 

Polyolefin HFFR compounds require heavy loading (>65%) of mineral flame retardants such as halogen-free metal hydrates (aluminium hydroxide, magnesium dihydroxide) to meet regulatory requirements. 

These heavy loaded compounds can induce processing issues during cable extrusion processing of HFFR jacketings: high torque, die build-up, lower throughputs, cable surface aspect, etc.