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PBT for loose tube optical fiber cable

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Update time : 2022-03-09 13:43:45
Loose tube is an important component for protecting optical fibers,to protect optical fiber with loose tube made of PBT (polybutylene taraphthalate)material is the major technology in OFC structure design.PBT Loose tube is generally applied in layer stranding cable and central tube fiber structure cable,to bear the mechanical stress might happen in production,laying and long term using of the cable.It has good resistance of stretching,bending,partial compressing,shocking and chemicals.Moreover,it can endure the effect of changes from external condition,such as temperature,moisture corrosion.PBT material is so far the best material for producing OFC loose tube.

The mechanical performance of PBT resin is mainly depending on its intrinsic viscosity or molecular weight,the larger molecular weight it has,the better physical properties it has.Loose tube for OFC requires PBT resin with very good mechanical performance,which needs PBT resin has higher intrinsic viscosity.In the industry,it takes solid condensation route to increase the intrinsic viscosity to meet the requirement of loose tube.

Usually Kreno use loose tube production which using PBT mateiral for Duct and ADSS cable.
 
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