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Як виробляють поліетиленові пакети: етапи створення сучасної упаковки

Polyethylene bags are one of the most commonly used types of packaging in the world. They are used in trade, logistics, medicine, the food industry, and everyday life. But have you ever wondered how polyethylene bags are made and what the process involves? In this article, we’ll walk you through the key stages of manufacturing the packaging you use daily.

1. Production of polyethylene film

It all starts with polyethylene granules – the raw material that is fed into an extruder. Under high temperature, the granules melt into a uniform mass. This mass is pushed through a forming ring and inflated into a "tube" — this is how polyethylene film is formed.

At this stage, the following are defined:

  • film thickness (in microns);
  • width of the future bag;
  • color – white, transparent, black, or colored with dye;
  • type of polyethylene – HDPE (rigid) or LDPE (flexible).

2. Printing (if needed)

If the bag needs a logo or image, it is printed on the film using flexographic printing. This is a high-speed technology that allows up to 8 colors to be printed with great precision. The client approves the design, after which a printing plate (cliché) is made and the printing begins.

3. Bag forming

After printing, the film goes to special automated machines that form the final product — such as a T-shirt bag, die-cut handle bag, courier bag, or packaging sack. This stage includes:

  • sealing of side or bottom seams;
  • punching handles (for handled bags);
  • cutting rolls or separating individual bags;
  • packing the finished products into polyethylene or boxes.

4. Quality control

Before the bags are shipped to the customer, they undergo a quality check. This includes checking:

  • strength of seams and handles;
  • compliance with dimensions and thickness;
  • print quality and color accuracy;
  • absence of defects or deformation.

What else do people search for about bag production?

  • polyethylene bag manufacturing steps;
  • how T-shirt bags are made;
  • LDPE/HDPE film production;
  • bag production lines;
  • custom logo bags;
  • printing on polyethylene packaging.

Order bags directly from the manufacturer

At cherpack.net you can order any type of bag — in bulk, with a logo, in a custom size, or made of transparent film. We produce polyethylene packaging tailored to your business needs — from layout to delivery.