In the high-end brush and precision consumables market, performance and sustainability are the core drivers of competitiveness. To meet these industry trends, Tai Hing has developed PTT filaments. Utilizing virgin PTT (polytrimethylene terephthalate) as a base material rather than traditional nylon or PBT, these bristles leverage a unique helical molecular structure to combine the advantages of multiple materials. They are ideal for high-end toothbrushes, baby brushes, 3D printing post-processing tools, and food-grade specialty brushes, offering a high-performance, eco-friendly bristle solution for both consumer and industrial applications.
Material Performance
The core performance of PTT stems from its PTT base's helical molecular structure. This design overcomes the limitations of traditional materials by combining the softness of nylon, the skin-friendly feel of acrylic, and the stain resistance of polyester. Combined with an optimal glass transition temperature, it provides an excellent foundation for processing.
Key specifications include an elastic recovery rate exceeding 95% and water absorption below 0.1%. It also delivers exceptional bend recovery, wear resistance, hydrolysis resistance, chemical corrosion resistance, and dimensional stability—allowing it to outperform traditional synthetic bristles in harsh, damp, or chemically aggressive environments.
Technical Specifications
| Diameter | 0.07mm-3.0mm |
| Standard per roll bundle diameter | 50±2mm |
| Cut length | 25–1220 mm (Tolerance: ±2 mm or -2/+8 mm) |
| Standard cut length | 1220mm |
| Cross-section | Customizable |
| Color | Customizable |
| Density | 1.33-1.34g/cm³ |
| Heat Deflection Temperature (HDT) | 170℃ |
| Bending strength | Meduim☑ |
| Straightness | Deformed easily☑ |
| Bending recovery rate | High ☑ |
| Tensile strength | High☑ |
| Certificate | ROHS、REACH SVHC、California prop 65 |
| Packaging | White crepe paper bundles, PE tubing, or self-adhesive film bundles |
Key Advantages
By combining premium PTT material properties with advanced precision extrusion processes, PTT delivers five key advantages that balance commercial value with sustainability:
1. High Elasticity & Fatigue Resistance: Flexible molecular chains provide excellent resilience and resistance to bending deformation, significantly extending brush lifespan.
2. Antimicrobial & Stable: Ultra-low water absorption minimizes moisture retention, preventing mold, bacterial growth, odor, and deformation at the source.
3. Chemical & Stain Resistance: Resists degradation from acids, alkalis, and detergents, maintaining elasticity and cleaning precision over long-term use.
4. Low Carbon Footprint: The base material contains 28% non-GMO bio-based content derived from renewable industrial corn, significantly lowering carbon emissions.
5. Safe & Easy to Process: This thermoplastic material is fully recyclable and complies with FDA food-contact standards. It integrates seamlessly into existing production lines, offers excellent end-rounding, easily accepts dyes, and is highly customizable.
Application
Leveraging its material advantages, PTT targets four primary sectors:
1. Personal Care: Ideal for high-end adult, infant, and sensitive skin toothbrushes. Its ultra-soft, skin-friendly texture protects gums while solving common issues like bristle prickliness, deformation, and molding.
2. Food-Grade Cleaning: Offers safe, extractable-free performance that withstands repeated sanitization, meeting strict hygiene standards in food processing.
3. 3D Printing Consumables: Delivers the dimensional stability and fatigue resistance needed for model cleaning, support removal, and other post-processing steps.
4. Industrial Precision Brushes: Provides the wear and corrosion resistance required for harsh industrial environments, ensuring reliable precision cleaning for electronics and hardware.
Product Clarification
PTT is a finished, ready-to-use bristle product made from bio-based PTT, not a raw chemical resin. Thanks to its inherent material properties and precise manufacturing, it outperforms traditional nylon and PBT in elasticity, safety, and eco-friendliness. It serves as the ideal choice for companies looking to upgrade high-end brush lines and build sustainable, differentiated product portfolios.
