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By understanding their properties and uses, we can appreciate the significant role they play in shaping both the microscopic and macroscopic aspects of our world.

In modern firefighting equipment, the choice of material for helmet visors is of utmost importance. Today, we will delve into two high-performance plastics—PPSU and PSU—and their outstanding performance in firefighter helmet visors and other high-end applications.

The PC/ABS alloy combines the high strength and heat resistance (110°C) of PC with the easy processability of ABS, widely used in automotive (dashboards, door handles), 3C electronics (laptop casings), communications (5G base station covers), and home appliances. It features UV resistance, flame retardancy (V-0 rating), and dimensional stability. Defects like silver streaks and warping are addressed through drying (120°C ×4h), mold temperature optimization, flow promoters, and structural design. Nano-enhanced (thermal conductivity 1.2 W/m·K) and bio-based modifications (40% carbon reduction) are expanding its applications in new energy and medical fields.

Basic Concept of CLTE The Coefficient of Linear Thermal Expansion (CLTE) is used to characterize the degree of expansion of a material as temperature rises and to assess its risk of cracking under thermal stress. Understanding the relative expansion/contraction properties between different materials in contact is crucial for successful applications.

BASF Ultramid T6000 (PA66/6T) is specifically developed for miniaturized electrical and electronic (E&E) components, bridging the performance gap between PA66 and PPA. This material combines excellent flow properties, easy processability, and long-lasting color stability. It exhibits superior mechanical and dielectric performance over PA66 under hot and humid conditions, while its low moisture absorption ensures dimensional stability.

In the wave of the low-altitude economy, engineering plastics have become an indispensable "unsung hero" for drones and electric vertical take-off and landing (eVTOL) aircraft, thanks to their lightweight, high strength, and corrosion resistance. From reinforced nylon used in robust fuselages and landing gears, to polycarbonate forming transparent and impact-resistant canopy covers; from the stable performance of polyetheretherketone (PEEK) in high-temperature motor components, to the exceptional strength that carbon fiber composites provide for rotors and primary structures—engineering plastics play a critical role in reducing weight, extending range, structural design, and safety protection. They quietly support the performance breakthroughs and commercial adoption of low-altitude aircraft, serving as a vital foundation for the ascent of this new economic paradigm.