Tray Sealer

A tray sealer is a packaging machine that seals pre-formed trays with a top film, which can be plastic or recyclable materials, to create a clean, secure food package. They are widely used for meat, ready meals, and food products requiring multiple tray formats or flexible production.

Tray Sealing Technology

Utien Pack tray sealing machines support multiple sealing technologies, allowing producers to select the most suitable packaging method based on shelf life, presentation, and sustainability goals.

Utien Pack Top Seal Technology

1. Top Seal

Top seal packaging seals a film directly onto the tray rim without vacuum or gas replacement. It is one of the most widely used tray sealing methods due to its simplicity and cost efficiency.

Utien Pack MAP Technology

2. Modified Atmosphere Packaging (MAP)

Modified Atmosphere Packaging replaces the air inside the tray with a controlled gas mixture before sealing. This slows oxidation and bacterial growth, helping extend shelf life while preserving product quality.

Utien Pack VSP Technology

3. Vacuum Skin Packaging (VSP)

Vacuum Skin Packaging draws a heated skin film tightly over the product and seals it to the tray under vacuum, eliminating air pockets and securing product position.

Utien Pack Unifresh® Technology

4. Unifresh® VSP

Unifresh® is Utien Pack’s proprietary VSP technology that supports controlled product protrusion while maintaining a secure seal. By tightly conforming the skin film to the product, Unifresh® enhances product visibility and presentation, making it ideal for premium food packaging applications.

Tray Sealer Category

Utien Pack provides tray sealing solutions covering different production scales and automation requirements. Our tray sealers are categorized by operation type to help customers quickly identify the right solution.

Automatic Tray Sealers | FSC Series

Automatic tray sealers are designed for continuous, high-output production. These systems integrate tray infeed, sealing, and discharge into a streamlined process and support advanced packaging technologies such as MAP and VSP. Ideal for large-scale food processors and industrial packaging lines.

    Semi-Auto Tray Sealers | FG Series

    Semi-auto tray sealers offer a compact and flexible solution for small to medium production volumes. They are suitable for operations requiring frequent tray changes, product testing, or controlled investment. Ideal for growing producers and flexible production environments.

      • FSC-400 Continuous Tray Sealer Machine can meet the packaging needs of large-scale production. With a professionally designed tray feeding mechanism, it can run continuously, significantly enhancing packaging efficiency. Based on varying packaging requirements, multiple sets of mold is optional for different products. Utien offers comprehensive and specialized packaging solutions tailored to client specifications.

        1. Machine dimension(mm): 3410×1121×1857
        2. 10-12 times/min sealing speed
        3. Power(kW): 15
        4. 4 trays per cycle
        5. Transparent top film, pre-printed top film
        6. Automatic sealing and cutting (MAP / Skin Pack)
        7. Applied to trays of various shapes and sizes

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      • Our semi automatic tray sealers FG-040 are designed to pack and seal prefabricated trays and are the perfect solution for small and medium-sized, batch, efficient and economical packaging. Also it’s an ideal entry-level devices for tray packaging. With MAP and VSP packaging option, this equipment is able to cover various top films onto trays of different materials.

        1. 2-3 times/min sealing speed.
        2. Attractive package with top VSP(UniFresh ®) technology.
        3. With top Busch vacuum, we can make residual oxygen lower than 1%.
        4. Applied to trays of various shapes and sizes.
        5. Anodized aluminum mold with drawer-type design.
        6. Small size and low power consumption.

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      • The FSC-600 Automatic Continuous Tray Sealer is tailored for large production environments, capable of sealing 6 trays per cycle, significantly increasing productivity. It features an advanced tray feeding system for continuous operation, making it ideal for businesses with high-volume packaging demands.

        1. Machine dimension(mm): 4210×1172×1792
        2. 10-12 times/min sealing speed
        3. 6 trays per cycle
        4. Auto tray feeding mechanism
        5. Transparent top film, pre-printed top film
        6. Power(kW): 18
        7. Applied to trays of various shapes and sizes

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      Tray Sealing Applications by Industry

      Tray sealing technology is widely adopted across the food industry due to its flexibility, hygiene, and scalability.

      Utien Pack Food Packaging Solution

      Food Packaging

      Tray sealing solutions are widely used for fresh food, processed food, and convenience products where producers manage multiple SKUs, frequent tray changes, or seasonal production demands.

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      Utien Pack Meat Packaging Solution

      Meat Packaging

      Tray sealers enable hygienic meat packaging with options for top seal, MAP, and vacuum skin packaging. This allows processors to control shelf life, maintain color stability, and deliver consistent retail presentation across multiple tray sizes.

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      Ready Meal Tray Sealing Solution

      Ready Meal Packaging

      For chilled and prepared meals, tray sealers support portion control, clean sealing, and compatibility with microwaveable and paperboard trays. This makes them ideal for convenience food producers balancing efficiency, shelf life, and sustainability.

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      Frequently Asked Questions
      Q: What Are Tray Sealers?

      A: Tray sealers, also known as tray lidding machines, heat sealers, or top sealers, are incredibly versatile packaging equipments. They are adept at affixing plastic film lids to trays made from different materials, accommodating a range of sizes and depths. This flexibility makes them an ideal packaging solution for a multitude of applications.

      Q: How Do Tray Sealers Work?

      A: Tray sealers automate the packaging process by precisely placing product-filled trays into position, where they are then sealed with a top film through a heat sealing method. The machine applies heat and pressure to bond the film to the tray, creating an airtight seal that preserves the contents. After sealing, the excess film is trimmed, and the sealed trays are ejected for further processing.

      Q: What Are The Components Of A Tray Sealer Machine?

      A: A tray sealer machine comprises an in-feed conveyor for tray alignment, a sealing film dispenser, a heated sealing plate for bonding the film to the tray, a cutting device for trimming excess film, and an out-feed system to dispatch the sealed packages, all managed by a central control panel and often supplemented with vacuum and gas flush systems for modified atmosphere packaging.

      tray sealer

      Q: How to choose the right tray sealer machine for your business?

      A: Choosing the right tray sealing equipment for your business depends on your production needs. For high-speed, high-volume production environments, our FSC 400/600 model, an automatic tray sealer, is ideal as it offers efficient, continuous operation. If your needs are more modest or your volume is lower, our FG 020/040 model, a semi-automatic tray sealer, provides a more suitable, cost-effective solution. Each option ensures reliability and quality sealing for a range of tray packaging requirements.

      Q: Can I use different tray materials with your tray sealers?

      A: Yes, our tray sealers are compatible with a variety of materials including PE, PS, C-PET, A-PET, EPP, EPET, and PP, allowing you to choose the best material for your product and sustainability goals.

      Q: How Our Tray Sealing Machines Extend the Shelf Life of Food Products?

      A: Our food sealing machines, featuring Modified Atmosphere Packaging (MAP) technologies, significantly extend the shelf life of food products. Equipped with MAP, our meal tray sealers are particularly valuable for businesses looking to reduce spoilage costs, enhance food safety, and distribute their products over longer distances, ensuring fresher, safer food reaches consumers.

      Q: Is tray sealing better than vacuum sealing?

      A: Tray sealing preserves food shape and is ideal for ready-to-eat meals, while vacuum sealing compresses products. Compare tray sealing and vacuum sealing method to decide which suits your needs.

      Utien Pack Tray Sealer PDF

      Technical specifications and configuration details.

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