Multi-field applications of high-performance ETFE films and practical application of ultrasonic spraying technology

ETFE stands for ethylene-tetrafluoroethylene copolymer (ETFE) membrane. As a fluorocarbon polymer material with excellent properties such as lightweight, high strength, high light transmittance, weather resistance, and corrosion resistance, it has broken through the application limitations of traditional membrane materials since its inception, setting off a wave of innovation in material applications in many fields such as construction, aerospace, electronics, and medical devices. From the iconic facade of the "Water Cube" at the Beijing Olympics to the flexible solar panel substrate for spacecraft, and the functional coating carrier for medical interventional devices, ETFE membrane has become the preferred material for high-performance scenarios due to its unique material properties.

Ultrasonic spraying technology, with its advantages of uniform atomized particle size, controllable coating thickness, high material utilization, and minimal damage to the substrate, is gradually becoming a core method for functional modification of ETFE membranes. In the construction industry, ultrasonic spraying technology enables the precise preparation of thermal insulation and antifouling coatings for ETFE membranes; in the medical device industry, it can endow ETFE membrane-based interventional devices with functions such as hydrophilic lubrication and drug sustained release; and in the aerospace industry, it can facilitate the efficient molding of radiation-resistant and thermally controlled coatings for ETFE membranes.

Advantages of ETFE film:

● High light transmittance (up to 95% or more, close to glass) and selective UV filtration;

● Excellent weather resistance, able to withstand temperatures ranging from -200℃ to 150℃, corrosion-resistant and anti-aging;

● Weighs only about 1% of glass, with good toughness and not easily broken;

● Low surface tension, strong self-cleaning properties, rainwater can wash away surface stains.

Shanghai Yangmi's ultrasonic spraying technology boasts core advantages such as uniform atomized solution particle size, controllable coating thickness, and high material utilization, making it highly compatible with the high-performance requirements of ETFE membranes. Its main applications include:

1. ETFE Membrane Surface Functional Coating Preparation

● Anti-stick/Antifouling Coating Enhancement: ETFE itself has self-cleaning properties. Applying a nano-scale fluorocarbon coating or hydrophilic coating to its surface via ultrasonic spraying further enhances its antifouling capabilities, making it suitable for building facades.

● UV-resistant/Heat-insulating Coating: Applying a uniform heat-insulating nano-coating (such as titanium dioxide or zinc oxide) to the surface of ETFE membranes used in construction allows for precise control of light transmittance and heat insulation performance, reducing energy consumption.

● Conductive Coating: Applying a conductive polymer or metal nanoparticle coating to the surface of ETFE membranes is suitable for use as a substrate in flexible electronic devices (such as flexible sensors and flexible batteries). Ultrasonic spraying ensures uniform coating without compromising the flexibility of the ETFE membrane.

2. ETFE Membrane-Based Device Coatings for Medical Devices

● For use in medical interventional catheters, applying a hydrophilic lubricating coating or a drug-releasing coating to the surface of the ETFE membrane. The low impact of ultrasonic spraying prevents membrane deformation, and the uniform coating thickness improves the biocompatibility and safety of the catheter.

3. Functional Modification of ETFE Membranes for Aerospace Applications

● Apply radiation-resistant or thermal control coatings to ETFE flexible membranes for spacecraft. By precisely controlling the coating thickness, the thermal radiation coefficient of the membrane material can be adjusted to adapt to the extreme temperature environment of space.

In the future, with the continuous upgrading of material modification technology and the ongoing upgrading of application demands, the deep integration of ultrasonic spraying technology will promote the innovative application of high-performance membrane materials in more high-end scenarios, providing important support for the technological upgrading and high-quality development of related industries. At the same time, it will provide a reference for the functional modification and application expansion of high-performance polymer materials, offering a technical path and practical experience.