Currently, Hongmao’s mainstream panel and circuit substrates are primarily polyester (PET) and polycarbonate (PC). Thanks to its excellent chemical resistance, outstanding resistance to flex fatigue, and dimensional stability, PET has become the preferred choice for circuit layers (i.e., the substrates that carry conductive circuits). It precisely meets the diverse application requirements ranging from medical devices to industrial control, and from smart home systems to automotive electronics.
Relevant technical data indicates that PET can withstand the high temperatures (approximately 300°F) required for the curing of conductive silver paste and is resistant to cracking and deformation under repeated pressure, which is crucial for switches that must withstand millions of actuations. In contrast, while PC offers superior visual appeal and is easier to post-process (e.g., die-cutting, embossing), it has poor solvent resistance and is prone to stress cracking. Therefore, it must be selected with caution for industrial and medical applications where contact with cleaning agents or oil contamination is likely. PC is better suited for consumer products or decorative panel layers that demand high aesthetic quality and operate in mild environments. Clearly, the first step in customization is to scientifically match material combinations based on the specific operating environment of the end device.
Hongmao’s in-depth customization capabilities directly address the diverse challenges posed by various application scenarios. In the medical device sector, where device panels are frequently exposed to disinfectants, switches must possess extremely high chemical resistance and sealing performance—a requirement perfectly met by membrane switch solutions combining PET material with PCB. In the industrial control sector, equipment often operates in environments with dust, vibration, and drastic temperature fluctuations. Using a PCB as the circuit carrier not only enhances vibration resistance and high-temperature tolerance but also prevents electrostatic interference by adding an EMI shielding layer, ensuring the precise transmission of control commands. In the rapidly growing smart home sector in recent years, customization is increasingly reflected in the integration of aesthetic design and backlighting effects. Designers can leverage the excellent light transmittance and printability of PET film to create control panels featuring light-guiding films, rich colors, and a smooth, refined texture, seamlessly integrating function keys into the home’s decorative style.
