Roll-to-Roll Ultrasonic Spray Coating Machine for PET Film
Roll-to-Roll Ultrasonic Spray Coating Machine: The Core Technology for Precision Coating of PET Film
The roll-to-roll ultrasonic spray coating machine is currently the core precision equipment for functional coating of PET film. With three major advantages—non-contact atomization, high-precision film control, and continuous mass production—it restructures the traditional coating process, providing high-performance coating solutions for electronics, optics, new energy, and other fields.
Technical Principle: Gentle Atomization, Precise Film Formation
The core of the equipment is the ultrasonic atomization system. A piezoelectric transducer is driven by a 20kHz-120kHz high-frequency electrical signal, converting electrical energy into high-frequency mechanical vibration. This vibration acts on the coating material at the nozzle, forming capillary standing waves. When the energy overcomes the surface tension, the coating is torn into uniform droplets of 1-50μm. A low-pressure carrier gas gently transports the droplets to the high-speed surface of the PET film, where low-temperature drying/UV curing forms a dense coating. The entire process involves no mechanical contact, and the atomization pressure is only 0.01-0.1MPa, perfectly suited to the thin, easily stretched, and heat-sensitive characteristics of PET film.
Core Advantages: Breakthrough from Tradition, Performance Leap Forward
– Extremely High Coating Precision: Narrow droplet size distribution, thickness deviation controllable within ±5%, free of pinholes, sagging, and orange peel defects, with excellent areal density uniformity. Enables precise preparation of ultra-thin coatings from 10nm to 10μm, meeting high-standard requirements for optical films, conductive films, etc.
– High Material Utilization: Strong droplet orientation and minimal splashing, coating utilization reaches 80%-90%, 2-3 times that of traditional spraying (30%-50%). Significantly reduces the loss of high-value materials such as graphene, nano-silver, and precious metal pastes, resulting in substantial cost reduction.
– Strong Flexibility and Adaptability: Non-contact spraying avoids scratching, stretching, and wrinkling of PET rolls. Adaptable to various coatings including water-based, solvent-based, and nano-suspension coatings, compatible with single-sided, double-sided, and multi-layer composite coatings. Roll-to-roll mode supports continuous production at line speeds of tens of meters per minute, adaptable to wide-width rolls.
– Environmentally Friendly Low-Temperature Process: No high-temperature baking is required; combined with room temperature/low-temperature curing, it avoids PET heat shrinkage, yellowing, and degradation. Low noise and low emissions meet green production standards.
Key Process Control
Before coating, the PET film undergoes corona or plasma pretreatment to improve surface energy and coating adhesion. During production, precise matching of roll tension, conveyor speed, ultrasonic power, carrier gas flow rate, and nozzle height is achieved. Parameters are adjusted in real-time through an intelligent PLC system to ensure uniform and stable coating during high-speed operation.
Mainstream Application Scenarios:
– Electronics and Flexible Displays: Coating with silver nanowires and graphene conductive coatings to prepare flexible circuit boards, transparent electrodes, and touch panels.
– Optical Films: Preparing antireflective films, anti-glare films, and ITO transparent conductive films for displays and photovoltaic glass.
– New Energy: Coating catalysts, proton exchange membranes, and electrode slurries for fuel cells and perovskite solar cells.
– High-End Packaging: Metallized PET films, barrier films, and antibacterial films for precision packaging of food, pharmaceuticals, and electronic devices.
Technological Value and Prospects
Roll-to-roll ultrasonic coating machines solve the pain points of traditional coating methods, such as poor coating uniformity, significant material waste, and easy damage to the substrate, enabling high-precision, high-efficiency, and environmentally friendly functional production of PET films. With the rapid development of flexible electronics, new energy, and intelligent optics industries, as a core piece of high-end coating equipment, it will continue to expand its application boundaries and become an indispensable key technology in the field of precision manufacturing.
About Cheersonic
Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.
Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.
Chinese Website: Cheersonic Provides Professional Coating Solutions
