Modern consumers demand fresh, preservative-free foods that feature extended shelf lives and aesthetic appeal. In response, global food processors, central kitchens, and agricultural packaging facilities are transitioning from bulk packaging methods to unit-dose tray configurations. This fundamental change is driven by the rapid growth of the ready-meal (convenience food) market, the global expansion of cold-chain logistics, and strict international hygienic standards.
Industrial tray sealing machines play a crucial role in modern commercial packaging. By precisely controlling sealing pressure, temperature, and gaseous composition, these systems create a robust microclimate within each tray. This prevents oxidation, slows bacterial proliferation, and protects food items from physical deformation during transit.
For exporters and manufacturers, satisfying these demands requires high-performance packaging lines that process diverse substrate configurations—including Polypropylene (PP), Crystalline Polyethylene Terephthalate (CPET), Amorphous PET (APET), aluminum foil, and biodegradable paperboard.
Utilizing gas ratios tailored specifically for meats, vegetables, or cheeses to maintain organoleptic characteristics for up to 21 days without chemical additives.
Ready to integrate into existing production lines alongside automatic tray denesters, multi-head weighers, and conveyor systems.
Our R&D pipeline focuses on three primary technological areas: precision control, energy conservation, and system flexibility. This engineering blueprint highlights our key performance standards.
Our gas-flushing systems lower residual oxygen levels to under 0.5%. By utilizing nitrogen, carbon dioxide, and oxygen mixtures, we keep fresh meats vibrant and bakery goods free from mold.
VSP contours a flexible film tightly around food products like a second skin. This locks in juices, prevents purge, and allows for clean vertical product display on retail shelves.
Microprocessor-driven heating elements eliminate cold spots across the mold cavity, preventing sealing failures on contaminated tray flanges and film seams.
Years of R&D Excellence
Exporting Destinations
Sealing Hermeticity Rate
Residual O₂ Level (MAP)
Ningbo Nexa Machine Co., Ltd. is a leading China food packaging machine manufacturer specializing in the design, development, production, and supply of automatic packaging systems and integrated packaging solutions for the global food industry. With years of industry expertise and a commitment to technological innovation, Nexa Machine delivers reliable, efficient, and intelligent packaging equipment to customers worldwide.
Our extensive product portfolio includes vertical form fill seal machines, vacuum packaging machines, pouch packaging systems, tray sealing machines, thermoforming packaging machines, sachet packaging machines, flow wrapping machines, cartoning machines, weighing and filling systems, and fully automated packaging lines. These solutions are widely used in the packaging of snacks, frozen foods, bakery products, confectionery, dairy products, powders, granules, liquids, pet food, and other food applications.
Driven by innovation, Ningbo Nexa Machine continuously invests in advanced manufacturing technologies and research and development capabilities. Our experienced engineering team develops high-performance packaging equipment featuring intelligent control systems, precise filling accuracy, stable operation, energy efficiency, and user-friendly interfaces to meet diverse production requirements.
Quality is the foundation of our success. Every machine is manufactured under strict quality control procedures and undergoes comprehensive testing before delivery to ensure outstanding reliability, safety, and long-term performance. In addition, we offer flexible OEM and ODM services, providing customized packaging solutions tailored to customers' specific production needs.
Serving clients across Europe, North America, South America, Southeast Asia, the Middle East, and Africa, Ningbo Nexa Machine Co., Ltd. has established long-term partnerships with food manufacturers, distributors, and industrial integrators worldwide.
We design and build our equipment to meet the regulatory requirements of different regions, ensuring a smooth import process and safe local operation.
All automatic continuous tray sealers are built to European CE safety directives, featuring interlocked safety guards, emergency stop loops, and low-voltage control circuits.
We use corrosion-resistant SUS304 and SUS316 stainless steel and food-grade anodized aluminum alloys, allowing for easy washdowns that meet strict USDA and FDA sanitary guidelines.
We provide localized technical assistance, commissioning services, and rapid-delivery tooling programs to minimize downtime during seasonal production shifts.
Modified Atmosphere Packaging (MAP) replaces the air inside the tray with a custom gas mixture (typically CO₂ and N₂) to prolong freshness, making it ideal for delicate foods like bakery items, salads, and minced meat. Vacuum Skin Packaging (VSP) uses heat and vacuum to mold a flexible skin film over the product, sealing it flat against the tray. This prevents purge and shifting, making it perfect for premium steaks, seafood, and cheeses.
Our machines use a vacuum-gas-flushing method. First, we pull a deep vacuum (up to 99.9% negative pressure) to remove ambient air from the chamber. We then backflush the chamber with food-grade gas before sealing, ensuring minimal residual oxygen and stable gas ratios.
Yes, our systems feature modular, quick-change tooling. Operators can swap molds in 5 to 15 minutes to run different tray sizes, compartment configurations, or packaging materials like PP, CPET, and aluminum.
For meals meant to go straight from the freezer to the oven or microwave, CPET (Crystalline Polyethylene Terephthalate) or aluminum trays are recommended. Standard PP (Polypropylene) trays are suitable for microwave heating but cannot handle traditional oven temperatures.
We design each sealing head with isolated heater cartridges and PID temperature controllers. Combined with double-axis mechanical compression or pneumatic cylinders, this provides consistent heat and pressure across the entire seal flange, preventing leaks even on trays with slight oil or moisture contamination.
We supply complete operation manuals, CAD electrical diagrams, and remote video debugging services. For larger, automated packaging lines, we send field engineers to assist with installation, calibrate gas flushing systems, and train local staff on routine maintenance.
Nexa Machine
