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Colored PBT

Updated: 2026-07-15

Overview

Colored PBT is a thermoplastic polyester engineered for applications requiring durability, heat resistance, and aesthetic appeal. Its molecular structure provides excellent mechanical properties and dimensional stability, making it a preferred material for precision components. The addition of colorants during manufacturing allows for consistent hues without compromising material performance. Unlike painted surfaces, colored PBT maintains its appearance even under abrasion or UV exposure. This intrinsic coloration is achieved through masterbatch compounding or liquid dyeing processes. The material's versatility supports both functional and decorative uses across industries.

Physical and Chemical Properties

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Colored PBT exhibits a tensile strength of 50-60 MPa and can withstand continuous use at temperatures up to 150°C. Its low moisture absorption (0.1-0.3%) ensures stable performance in humid environments, while its dielectric strength makes it suitable for electrical applications. The material demonstrates excellent resistance to oils, fuels, and most chemicals except strong acids and bases. Color stability is maintained up to 200°C, with UV-stabilized grades available for outdoor use. Rheological properties allow for efficient injection molding and extrusion processing.

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Main Applications

In automotive systems, colored PBT is used for sensor housings, connector systems, and interior components where color coding is essential. Electronics manufacturers utilize it for keyboard keys, switch housings, and LED components due to its electrical insulation and heat resistance. Consumer goods applications include power tool housings, appliance handles, and wearable devices. The material's ability to maintain vibrant colors under friction makes it ideal for buttons and control interfaces. Medical applications include surgical instrument handles and dental equipment components.

Safety and Storage

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PBT granules should be stored in original packaging or sealed containers to prevent moisture absorption, which can affect processing. Although non-hazardous under normal conditions, processing at high temperatures may release trace fumes requiring adequate ventilation. Workplace safety measures include using dust collectors during material handling to minimize airborne particles. Spills should be collected mechanically rather than with solvents. Disposal should follow local regulations for plastics recycling, as PBT is technically recyclable but requires specialized processes.

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B2B Procurement Guide

When sourcing colored PBT, specify required certifications such as UL recognition, RoHS compliance, or FDA approval for food-contact applications. Technical datasheets should include colorimetric values (L*a*b* or RAL codes) and lightfastness ratings. For large-volume purchases, consider requesting material samples for color matching and performance testing. Lead times may vary for custom colors, with standard hues typically available from stock. Pricing tiers often apply based on order volume, with additional charges for specialty additives like flame retardants or anti-static agents.

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