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 items	Unité	Valeur
Density	g/cm³	1.25~1.35
Melting point	℃	210~240
Melt index （250℃、2160g）	g/10min	7.0~15.0
Yield strength	MPa	≥50
Yield elongation	%	4.0~10.0
Elongation at break	%	50
Modulus of elasticity for tension	MPa	≥2100
Modulus of elasticity in static bending	MPa	≥2200
Bending strength	MPa	≥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 resistivity	Ω·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.