Birth of Long‑Afterglow Photoluminescent Thermoplastic: JT‑HMG‑50 Opens a New Chapter for Self‑Luminous Pavement Solutions News Release | Hangzhou Junting Luminescence Technology Co., Ltd.

Traditional road-marking materials mainly rely on retro-reflective technology to achieve visibility at night. Such solutions depend entirely on external light sources such as vehicle headlights or street lamps. In remote rural roads, quiet park trails, riverside and cliff-side hazard zones, factory workshops, and parking lots with insufficient public lighting, reflective markings can lose their warning effectiveness once external illumination disappears. This long-standing industry challenge creates potential safety risks for both pedestrians and vehicles.

To address this challenge, at Hangzhou Junting Luminescence Technology Co., Ltd., we have drawn on years of expertise in long-afterglow photoluminescent pigments and conducted extensive formula research, material compatibility testing, and on-site construction verification. Through this work we have successfully combined high-performance long-afterglow luminous pigments with thermoplastic polymer systems incorporating base polymers, tackifiers, plasticizers, and antioxidants. This has enabled us to officially launch JT-HMG-50 photoluminescent thermoplastic material, also known as long-afterglow luminous thermoplastic.

With JT-HMG-50, we have developed a power-free, self-luminous solution for transportation infrastructure, municipal landscape construction, and industrial safety-warning applications. The core technical challenge during development was achieving stable compounding between inorganic long-afterglow luminous powder and thermoplastic polymer systems. Without proper compatibility luminous pigments can agglomerate within the polymer carrier, weakening luminescence performance while negatively affecting the physical properties of the thermoplastic material.

Our R&D team repeatedly adjusted the proportions of each component, optimized the pigment dispersion technology, and worked to ensure the photoluminescent pigment was evenly distributed throughout the thermoplastic matrix. As a result, JT-HMG-50 retains the advantages of conventional thermoplastic road-marking materials and their established thermal construction processes while fully utilizing long-afterglow luminous performance without sacrificing weather resistance and mechanical strength.

Under standard laboratory test conditions using an excitation illuminance of 1000 LUX, a D65 standard light source, 20 minutes of excitation, and an ambient temperature of 25°C, JT-HMG-50 reaches an initial luminosity of up to 2600 mcd/m² after light charging. Its luminosity measures 350 mcd/m² after 60 minutes, 170 mcd/m² after 120 minutes, and 105 mcd/m² after 180 minutes, with a total afterglow duration exceeding 50 hours.

After absorbing natural light or white light during the daytime JT-HMG-50 can emit light autonomously in total darkness. It requires no cables, power supply, or electronic components, following the simple working principle of “absorb light during the day, release light at night.” This characteristic makes it particularly valuable for locations where power installation is difficult or ongoing maintenance costs are high.

JT-HMG-50 also provides strong environmental adaptability for outdoor engineering applications. Its applicable operating temperature ranges from -30°C to 70°C. The finished layer provides reliable resistance to water, grease, and common chemical solvents, together with strong weather resistance, including resistance to UV exposure, humidity, and oxidation. These properties help ensure stable performance during long-term outdoor exposure.

The material has a density of 2.5 g/cm³. We recommend a construction thickness of 2.2 mm to 3.0 mm, with material consumption of approximately 4-5 kg per square meter for full coverage. This provides a practical balance between luminous performance and project cost control. JT-HMG-50 also demonstrates excellent bonding compatibility with a range of substrates. Asphalt pavement, concrete pavement, rubber surfaces, resin-bonded stone pavement, and natural stone pavement can all be used as construction substrates, significantly expanding the material's potential for real-world applications.

In terms of construction technology, JT-HMG-50 inherits the mature thermoplastic marking processes already familiar to road-engineering teams and does not require specialized new equipment. The recommended heating temperature varies according to the season, with 150°C-160°C recommended for winter construction and 135°C-145°C for summer construction. For linear marking applications users can employ integrated thermoplastic road-marking machines. For landscape projects custom high-temperature-resistant stencils can be used to create decorative luminous patterns.

Before construction, the ground surface must be thoroughly cleaned to remove dust, oil stains, and loose gravel. Surface protrusions should be ground flat, and construction on wet or frozen surfaces is strictly prohibited. To maximize luminous brightness, we strongly recommend applying a 1-1.5 mm thick white thermoplastic underlayer before pouring the luminous thermoplastic. After application the area should be cordoned off and protected. The polymer material requires a 24-hour cooling period to achieve optimal physical performance. Surface tackiness during the early curing stage is a normal phenomenon and will gradually disappear as the material completes its curing process.

JT-HMG-50 covers a wide range of application scenarios. For traffic safety applications, it can be used for road edge lines, lane separation lines, crosswalks, bicycle-lane boundaries, walkways, running tracks, and warning lines alongside rivers and cliffs. For municipal and landscape applications, JT-HMG-50 can be used to create luminous rural road surfaces, park trail decorations, starry-sky-style pavements, and artistic ground patterns. In industrial environments, it can be used for workshop equipment warning lines and parking boundary markers. Beyond straight marking lines, custom stencils allow us to create a wide variety of decorative shapes, safety symbols, and cultural patterns for parks, squares, courtyards, and other public spaces. This allows us to combine safety-warning functionality with landscape and aesthetic value in a single material solution.

For product supply, JT-HMG-50 is packaged in 5 kg transparent PE inner bags and packed into 20 kg white plastic drums, providing convenient storage and transportation for engineering projects. Beyond supplying the material itself, we also provide one-stop supporting resources for our customers. These include white underlayer thermoplastic materials, integrated thermoplastic marking machines, melting tools, and custom-cut high-temperature-resistant pattern stencils. We also provide professional technical documentation, including TDS data sheets and detailed construction instruction manuals, to help on-site operators standardize construction procedures and reduce quality risks caused by improper heating or surface treatment.

Looking ahead, we will continue investing in the R&D of long-afterglow functional materials. We will further optimize our formulation systems for different climates and engineering conditions while developing more customized photoluminescent products for transportation, municipal infrastructure, cultural tourism, and industrial safety applications. By combining our core photoluminescent material technology with real-world engineering requirements, we are committed to providing our global partners with safer, greener, and more energy-efficient self-luminous solutions.