How Do Vertical Form Fill Seal (VFFS) Packaging Machines Work?

Have you ever wondered how snack food companies manage to package their products so efficiently? Or perhaps, you’re a business owner looking for a packaging solution for your product? In either case, understanding the workings of Vertical Form Fill Seal (VFFS) Packaging Machines can be valuable for you.

In this blog post, we’ll explain how VFFS packaging machines work and why they are an essential component in the packaging industry. We will explore various aspects of these machines, ensuring you have a comprehensive understanding of their functions and capabilities. So let’s dive in!

What is a Vertical Form Fill Seal (VFFS) Packaging Machine?

A Vertical Form Fill Seal (VFFS) Packaging Machine is an automated packaging system that forms, fills, and seals bags or pouches vertically. These machines are commonly used in the food industry to package snacks, grains, powders, and liquids. They offer high efficiency, speed, and versatility, making them a popular choice for manufacturers.

How Does a VFFS Packaging Machine Work?

The VFFS packaging process can be divided into four main stages: film unwinding, bag forming, filling, and sealing. We’ll discuss each stage in detail below.

1. Film Unwinding

The packaging material, usually a roll of flexible plastic film, is loaded onto the VFFS machine. The film is then unwound and fed through a series of rollers and dancer bars, which maintain consistent tension and alignment.

2. Bag Forming

As the film is unwound, it passes through a forming collar or tube, which shapes it into a continuous cylindrical form. This process is called bag forming. The film’s edges are overlapped and sealed vertically by a set of heat-sealing or ultrasonic sealing jaws, creating a continuous tube.

3. Weighing & Filling

After bag forming, the tube is filled with the product to be packaged. The filling process can be performed in various ways, depending on the type of product and the required accuracy. Some common filling methods include:

  • Volumetric filling: Used for products with consistent density, such as grains or granules.
  • Auger filling: Ideal for powders and other fine materials.
  • Weigh filling: Suitable for products with varying densities or irregular shapes.
  • Piston filling: Typically used for liquids and semi-solid materials.

4. Sealing and Cutting

Once the product is filled, the top of the tube is sealed using heat or ultrasonic sealing. This creates the top seal of one bag and the bottom seal of the next one. Simultaneously, a cutting mechanism, such as a knife or serrated blade, separates the individual bags. The sealed and cut bags are then discharged onto a conveyor for further processing, such as labeling or boxing.

What are the Benefits of Using a VFFS Packaging Machine?

VFFS packaging machines offer several advantages for businesses:

  • High speed and efficiency: VFFS machines can produce a large number of bags per minute, significantly increasing production capacity.
  • Versatility: These machines can handle various products, bag sizes, and materials, allowing manufacturers to use them for multiple applications.
  • Reduced labor costs: Automation reduces the need for manual labor, resulting in lower operational costs.
  • Improved product protection: The airtight seals created by VFFS machines help maintain product freshness and prevent contamination.
MODELVFJ-520 IntermittentVFJ-520V Continuous
Bag width80-250mm(W)100-250mm(W)
Max roll fifilm width520mm520mm
Packing speed5-60 bag/minMax. 180 bags / min
Air consumption0.4m³/min 1.0Mpa0.4m³/min 0.7Mpa
Power voltage2.7kW 220V 50/60HZ5KW 220V 50/60HZ
Machine weight550KG950KG

How Can You Choose the Right VFFS Machine for Your Business?

Selecting the appropriate VFFS machine for your business involves considering factors such as:

  • Product type: The machine should be compatible withthe product you want to package, whether it’s solid, granular, powder, or liquid.
  • Bag size and style: Determine the size and style of bags required for your product, and ensure the VFFS machine can accommodate these specifications.
  • Production capacity: Choose a machine with a speed that meets your production requirements, considering both current and future needs.
  • Budget: Analyze the cost of the VFFS machine, including the initial investment, maintenance, and consumables, such as film and spare parts.
  • Ease of use and maintenance: Opt for a machine with a user-friendly interface and easy access to components for maintenance and cleaning.

It’s also essential to partner with a reputable supplier, such as HonorPack, that offers high-quality machinery, customized packaging solutions, and reliable after-sales support.

What Additional Features Can Enhance a VFFS Packaging Machine’s Performance?

Modern VFFS machines can be equipped with several additional features to further improve their performance and efficiency:

  • Gas flushing: This process involves injecting an inert gas, such as nitrogen, into the bag before sealing to extend product shelf life and prevent oxidation.
  • Printers and labelers: Inline printers and labelers can be integrated into the VFFS machine to print product information, barcodes, or logos directly onto the packaging film.
  • Metal detectors and checkweighers: These devices ensure product safety and compliance by detecting metal contaminants and verifying that the filled bags meet weight specifications.
  • Vacuum sealing: For products that require vacuum packaging, some VFFS machines can be fitted with vacuum sealing capabilities.


Vertical Form Fill Seal (VFFS) Packaging Machines are versatile, efficient, and reliable solutions for packaging a wide range of products. Understanding how these machines work can help businesses make informed decisions when selecting the right packaging equipment. By choosing a high-quality VFFS machine and partnering with a reputable supplier, you can improve your packaging process and enhance your overall operational efficiency.

Please click below to watch the production process of Vertical Form Fill and Seal Packaging Machine.



Recent Posts


Packaging Machine Specialists

Hi, I’m Francis Wu, General Manger of HonorPack, I have been running a factory producing packaging machinery in China for 20 years, discussing equipment and operation with our technical staff and communicating with our experienced packaging experts..

To Save Time

You may fill the form and let our sales assistant you to find the right machine