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.