PBT Masterbatch for Fibre Optic Loose Tubes – DELTAPLAST
DELTAPLAST PBT Masterbatches from Delta Tecnic are designed for fibre optic loose tube applications, where dimensional stability, colour precision and extrusion performance are critical.
PBT is the most widely used material in fibre optic buffer tube manufacturing due to its mechanical strength, thermal stability and low shrinkage rate. In these applications, it is essential that the masterbatch does not affect tube geometry or the material’s behaviour during extrusion.
DELTAPLAST solutions ensure high pigment concentration, excellent dispersion and controlled shrinkage, helping maintain tube integrity and ensuring reliable signal transmission.
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DELTAPLAST PBT masterbatches have been specifically developed for fibre optic cable manufacturers, where precision and performance requirements are particularly demanding.
Key features include:
- High pigment concentration and low dosage: Reduces the amount of masterbatch required, optimizing cost and improving process efficiency.
- Excellent pigment dispersion: Ensures uniform colour even in thin layers, avoiding visual defects and improving tube identification.
- Dimensional stability and shrinkage control: Formulations are designed not to affect tube contraction, maintaining the geometry required to protect optical fibres.
- Compatibility with transparent and opaque PBT resins: Thanks to their high pigment concentration, these masterbatches can be used with different PBT resin types available on the market.
- High thermal resistance and colour stability: According to the technical bulletin, these masterbatches offer thermal resistance up to 290 – 300 °C and high lightfastness levels (up to 8), suitable for demanding environments.
In addition, they are designed to preserve all mechanical properties of PBT, ensuring fibre protection and long-term cable performance.
Applications
DELTAPLAST PBT Masterbatches are designed for telecom cable applications where precision and stability are essential.
Typical applications:
- PBT loose tubes for fibre optic cables: Protective tubes for optical fibres in telecom cables.
- FR PBT buffer tubes: Flame-retardant tubes for specific applications.
- Micro-module fibre constructions: Advanced cable designs with compact fibre structures.
These applications require materials capable of maintaining dimensional stability, colour consistency and mechanical protection of optical fibres.
Technical FAQs
Why is PBT used in fibre optic tubes?
Because it offers high dimensional stability, mechanical strength and excellent thermal performance.
Does the masterbatch affect tube shrinkage?
No. It is specifically formulated to control shrinkage and maintain tube geometry.
What are the benefits of high pigment concentration?
It allows low dosage levels while maintaining excellent colour quality.
Can it be used with different types of PBT?
Yes. It is compatible with both transparent and opaque PBT resins.