How does a paper bag making machine work? 2025 new

Paper bag machines are mainly divided into two categories according to the feeding method: sheet-fed paper bag machines and roll-fed paper bag machines. Although the working principles of these two types of equipment are slightly different, they can both produce paper bags efficiently and quickly.

1. Roll fed Paper Bag Machine

Roll fed paper bag machines use roll paper as raw material, with paper thickness range of 45-160 gsm, primarily kraft paper and PE coated food paper. They primarily produce sharp bottom(V bottom) paper bags, food paper bags, and take away paper bags.

Main production process: Roll-fed > Paper printing (optional) > Paper gluing > Paper handle pasting (optional) > Paper bag gusset forming > Paper bag tube cut-off > Paper bag bottom opening > Paper bag bottom gluing > Paper bag bottom gluing > Paper bag bottom sealing > Paper bag output

The more workflows involved, the more expensive the machine.

2. Sheet fed Paper Bag Machine

Sheet-fed paper bag machines use offset-printed single sheets as raw material, with paper thickness range of 100-300 gsm. The machien main use kraft paper, art paper, ivory board paper, and special paper etc. sheet feeding machine primarily produce mid- to high-end paper bags, such as gift paper bags, eco-friendly paper bags, luxury paper bags, and boutique paper bags.

Main production process: Automatic single sheet feeding > Paper gluing (optional) > Reinforce top card or paper handle pasting (optional) > Top folding > Paper bag tube forming > Paper bag bottom opening> Automatic bottom card instert (optional) > Bottom gluing > Bottom sealing > Paper bag output.

Sheet-fed paper bag machines are primarily used to produce high-quality paper bags, so they have a few additional steps.

With the continuous development and advancement of technology, Zenbo base on his single-sheet paper bag machine, broke through technical barriers and successfully developed a two feeding function paper bag machine in 2019. In roll-fed mode, it can use flexo printed roll paper as raw material. After passing through an online slitting unit, it is slit into single sheets. Subsequently, the single-sheet process is adopted to produce paper bags of the same quality as single-sheet paper. Zenbo named the two feeding function paper bag machine the roll-to-sheet paper bag machine.

(▲Click on the picture to learn more)

At All in Print Shanghai 2023, ZENBO officially unveiled its high-speed roll-to-sheet paper bag machine. To achieve high production speed, this machine eliminates the single sheet feeding system and utilizes more integrated components, resulting in greater stability at high speeds.

All paper bag machines have a bag making range, which can be adjusted by engineers, so paper bags of different sizes can be produced.

If you're planning a new paper bag machine project, or looking to improve production efficiency or reduce labor costs, please feel free to contact us. We'll be happy to assist you.