PBT

Polybutylene Terephthalate

-Good processability.

-Good batch-to-batch stability.

-With an integrated supply chain and effective cost control, our products are competitively priced and have been widely adopted by optical cable manufacturers worldwide.
Test itemsUnitValue
Densityg/cm³ 

1.25~1.35

Melting point℃210~240
Melt index

(250℃、2160g)

g/10min7.0~15.0
Yield strengthMPa≥50
Yield elongation%4.0~10.0
Elongation at break%50
Modulus of elasticity for tensionMPa≥2100
Modulus of elasticity in static bendingMPa≥2200
Bending strengthMPa≥60
IZOD Impact Strength (23℃)kJ/m2≥4.0
IZOD Impact Strength (-40℃)kJ/m2≥4.0
Load deformation temperature (1.8MPa)℃≥55
Load deformation temperature (0.45MPa)℃≥170
Saturated water absorption%≤0.5
Water content%≤0.05
Shore hardness HD—≥70
Volume resistivityΩ·cm≥1.0×1014

This product is an engineering thermoplastic specially developed for the secondary coating of optical fibers, primarily used in the manufacture of optical fiber loose tubes — the core structural component of optical cables.

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