Core Features
1. High temperature resistance, compatible with PBT extrusion process with temperature resistance up to 290~300℃. No decomposition, discoloration or precipitation occurs during high-temperature extrusion of PBT, and no bubbles or charred particles are generated, ensuring stable high-speed secondary sheathing production.
2. Excellent pigment dispersibility and uniform, stable color. The pigment is ultra-finely dispersed, with no streaks or color spots even for thin-walled sleeves. Batch-to-batch color difference is minor, and 12 standard color spectra are precise, facilitating optical cable production identification and fiber sequence differentiation during construction and splicing. The color powder has extremely low precipitation and will not contaminate optical fibers and filling ointment.
3. Low-shrinkage formula to stabilize optical fiber excess length (the most critical indicator of optical cables). The special formula controls post-shrinkage of PBT and reduces the increase in loose tube post-shrinkage caused by color masterbatch acting as a nucleating agent. It stabilizes optical fiber excess length and prevents the loose tube from shrinking and squeezing optical fibers in the later stage, which would lead to increased optical loss.
4. Good compatibility with PBT and filling ointment. The carrier resin is highly compatible with the PBT substrate and does not impair the inherent mechanical and hydrolysis resistance of PBT. It is chemically inert, does not react with optical cable filling ointment, and will not corrode optical fiber coatings, guaranteeing long-term transmission stability of optical cables.
5. Retains mechanical and insulating properties of PBT substrate. It has low addition amount and high tinting strength. A small dosage will not reduce the tensile strength, impact resistance and insulating properties of PBT. It features hydrolysis resistance and resistance to acid, alkali and salt spray, maintaining long-term stability in humid underground environments.
6. Environmentally compliant. It contains no heavy metals and meets RoHS and REACH environmental requirements, suitable for export projects.
Materials with other characteristics – please inquire separately.
