China thermoplastic road marking paint is a solid powder coating material formulated according to the national transportation standard JT/T 280-2022. It becomes flowable when heated to 180–210 °C and forms a durable, reflective film after cooling. This paint is mainly used for creating long-lasting traffic lines such as center lines, edge lines, pedestrian crossings, arrows, and symbols on asphalt or concrete pavements.
As a hot-melt marking material, it offers excellent adhesion, high reflectivity, fast drying, and strong wear resistance. The finished markings are bright, weatherproof, and suitable for highways, city roads, airports, parking lots, and industrial zones, ensuring safe and visible traffic guidance both day and night.
Thermoplastic road marking paint must be heated, applied, and cooled under controlled conditions to ensure strong adhesion and long-term durability. The process generally includes preheating, application, and bead dropping, followed by natural cooling. Below are the main steps used in professional road marking projects.
Pour the solid thermoplastic powder into a specialized preheater and heat it to 180–210 °C until it becomes a uniform molten liquid. Maintain constant stirring to avoid scorching or uneven melting. The paint should remain smooth and free from bubbles before transfer.
Transfer the melted paint into the thermoplastic road marking machine. Apply evenly on the road surface at the desired line width and thickness, typically 1.5–2.0 mm. Ensure the pavement is clean and dry for optimal adhesion to asphalt or concrete.
While the paint is still hot, immediately drop 300–400 g/m² of reflective glass beads onto the surface. The beads embed partially into the molten layer, enhancing retroreflectivity for clear night visibility and improved road safety.
After application, allow the markings to cool naturally for about 3–5 minutes. Once hardened, the surface becomes smooth, wear-resistant, and traffic-ready. Proper temperature control ensures that the paint film bonds firmly and resists deformation or peeling.
| Item | Unit | Standard Requirement / Typical Value | Remarks |
|---|---|---|---|
| Appearance | — | Uniform solid powder, free of impurities and lumps | Visual inspection |
| Softening Point | °C | ≥ 100 | Thermal stability before melting |
| Density | g/cm³ | 1.9 – 2.3 | Depends on pigment/filler ratio |
| Viscosity at 200 °C | s | 15 – 45 | Flow cup method |
| Flowability (at 200 °C) | mm | 180 – 220 | Construction smoothness |
| Drying Time (Non-stick to Tire) | min | ≤ 5 | Traffic-ready time |
| Adhesion (Pull-off Strength) | MPa | ≥ 0.6 | On asphalt concrete base |
| Compressive Strength (23 °C ± 1) | MPa | ≥ 18 | After 24 h curing |
| Compressive Strength (60 °C ± 1) | MPa | ≥ 1.0 | Heat-resistance stability |
| Wear Resistance (Mass Loss) | mg | ≤ 60 | Abrasion test |
| Water Resistance (24 h) | — | No blistering, cracking, or discoloration | Distilled water immersion |
| Alkali Resistance (24 h) | — | No blistering, cracking, or discoloration | Saturated Ca(OH)₂ solution |
| Retroreflectivity (RL, dry) | mcd·m⁻²·lx⁻¹ | ≥ 200 (white), ≥ 150 (yellow) | With standard glass beads |
| Brightness Factor (β) | — | ≥ 0.75 (white), ≥ 0.50 (yellow) | Colorimetric measurement |
| Skid Resistance (SRT Value) | — | ≥ 45 | British pendulum tester |
| Glass Bead Content (Premixed) | % by weight | 20 – 30 | Adjustable |
| Surface Glass Bead Drop Rate | g/m² | 300 – 400 | Standard application rate |
| Application Temperature Range | °C | 180 – 210 | Recommended heating range |
| Heat Stability (4 h at 200 °C) | — | No segregation; no significant color change | Melt stability |
| Shelf Life | months | ≥ 12 | Dry, ventilated storage |
| Standard Package | kg/bag | 25 ± 0.5 | Moisture-proof plastic bags |
Source standard: National Standards Information Public Service Platform
Although thermoplastic road marking paints around the world share similar functions, their formulations and testing standards vary by region. The proportion of resins, fillers, pigments, and glass beads directly affects the product’s service life, retroreflectivity, and overall cost.
In many Asian countries, such as Vietnam, the local standard TCVN 8791:2011 directly references the Chinese JT/T 280-2022 specification. This means that thermoplastic paints manufactured under China’s standard can fully comply with Vietnamese government quality inspections when used for road marking projects.
For the AASHTO M249 standard used in the United States, only minor adjustments are needed—typically adding reflective glass beads to reach around 30% content and ensuring the same performance consistency—making Chinese thermoplastic materials suitable for export to American projects.
The BS 3262 standard from the United Kingdom and Europe requires higher durability and optical properties than the Chinese standard. However, by fine-tuning the formulation—such as enhancing resin purity and bead adhesion—products based on the Chinese specification can also meet EU testing requirements. This adaptability makes Chinese thermoplastic road marking paints a versatile and cost-effective choice for international use.
