Special Flocking HUD Baffle Flocking — Delivering a crystal-clear, floating display.

The Limitations of Traditional Craft: Why Spraying Matte Paint Falls Short

Before the application of flocking technology, HUD manufacturers primarily relied on the matte paint process to address the issue of inner wall reflection. Matte paint works by using matting agent particles within the coating to scatter light and reduce specular reflection. However, this scattering effect is limited; it cannot fully absorb stray light, making it difficult to completely eliminate ghosting. More critically, the matte paint coating is prone to aging and peeling during use: temperature fluctuations and mechanical vibration cause micro-cracks in the paint surface, leading to the detachment of matting particles and compromising the optical performance of the HUD.

The Flocking Solution: A Revolutionary Breakthrough in Light Management

Flocking technology has introduced an innovative solution to the HUD clarity issue. Its principle involves applying a specialized flocked layer to the surface of the HUD's internal light-shielding shell to absorb excess light. When light projected from the PDU optical engine hits these flocked surfaces, the layer efficiently absorbs it, preventing the generation of reflected or refracted light. This is analogous to how acoustic foam eliminates echo in a recording studio. By absorbing superfluous light, it ensures that only the primary display information is visible to the driver.

Technical Details: The Precision Design of Special Flocking's HUD Flocking

The front central area of the light-shielding shell is recessed inward to form a cavity structure, which includes a mounting area for installing the PDU optical engine. Within this precise optical system, any internal surface that may be exposed to light requires flocking treatment.

The flocking design for HUDs is far more complex than it appears. To address the intricate internal structures of HUD equipment, Special Flocking pioneered a 6-axis robotic intelligent coating system. This system achieves full automation of core processes like adhesive application and flocking spraying through high-precision trajectory planning (±0.1mm), overcoming the consistency challenges traditional processes face with deep recesses and complex curved components.

· Adhesive Control: An ultra-thin adhesive layer of 0.1-0.2mm balances structural strength with spatial efficiency.
· Optically Optimized Fibers: Utilizes matte nylon fibers with an adjustable length range of 0.3-5.0mm.
· Reflectance Reduction: Compared to traditional matte paint processes, reduces HUD reflectance by over 56%.
· Exceptionally Low Linting/Fiber Shedding: Achieves industry-leading linting resistance, preventing contamination of the HUD screen caused by loose fibers.

Comparative Test Report: Sprayed Matte Paint (Left) vs. Special Flocking Flocking Solution (Right) - HUD Reflectance 

Technology Benchmark: Special Flocking's Innovative Flocking in the Automotive Sector

Leveraging its founder's three decades of expertise in flocking technology, Special Flocking has successfully adapted and applied flocking processes to the automotive interior sector through continuous R&D breakthroughs. The company's developed HUD flocking solution significantly reduces optical interference and enhances the visibility of driving information, benefiting from high-precision fiber alignment and optical compatibility .

The company achieved IATF 16949 Automotive Quality Management System certification in 2022, establishing comprehensive end-to-end quality control from raw material selection to finished product delivery, ensuring compliance with stringent automotive-grade standards.