What is Bag Production Process?

What is Plastic Bag Production Process?

DMS Converting Poşet Kesim Makineleri

The production process of plastic bags typically involves several steps. Here’s a general overview of the process:

  1. Raw Material Preparation: The primary raw material used for plastic bag production is polyethylene, which is derived from crude oil or natural gas. The polyethylene is typically in the form of small pellets or granules.

  2. Extrusion: The first step in the production process is extrusion, where the polyethylene pellets are melted and formed into a molten polymer. This is achieved by feeding the pellets into an extruder, which consists of a heated barrel and a screw. The screw applies pressure and friction to melt the pellets as they move through the barrel.

  3. Film Formation: Once the polymer is melted, it is forced through a narrow slit or die at the end of the extruder. This forms a continuous, flat tube of molten plastic. The size and shape of the die determine the width and thickness of the film.

  4. Cooling and Flattening: The extruded film is then cooled rapidly using a series of chilled rollers or air cooling. This solidifies the molten plastic into a thin, flexible sheet. The sheet is then flattened and wound onto large rolls.

  5. Printing (Optional): If desired, the plastic film can be printed with branding, product information, or other designs. Printing is typically done using techniques such as flexographic or rotogravure printing.

  6. Bag Formation: The rolls of plastic film are then unwound and fed into a bag-making machine. The machine cuts the film into the desired bag size and shape, seals the sides to form the bag, and cuts off individual bags. Various types of bags, such as grocery bags, trash bags, or ziplock bags, can be produced depending on the specific machine settings.

  7. Finishing: After the bags are formed, additional processes may be performed to add features like handles, gussets, or closures. For example, some bags may have die-cut handles, while others may have ziplock closures or drawstrings.

  8. Quality Control and Packaging: Throughout the production process, quality control measures are implemented to ensure the bags meet the required specifications. Once the bags are produced, they are usually bundled or packaged in bulk for storage or transportation.

It’s important to note that different manufacturers may have variations in their production processes, and specialized equipment may be used for specific types of bags. Additionally, environmental concerns have led to the development of biodegradable or reusable alternatives to traditional plastic bags in recent years.

The machines we produce for the cutting and rolling under the brand of DMS Converting:

– Over Sized Perforated Machine: This machine provides solution from roll to roll. Product output can be used as heavy duty bags. For example “bed produces” can be used this bags with high efficiency.

– Pre-Open Perforated Bag Machine: This machine provides solution from roll to roll with pre-open feature. Product output can be used in for e-commerce customers and auto bag clients.

– Tshirt Type Bag On Roll Machine: It is first commercialized Tshirt Type Rolling Machine in Türkiye. It provides price advantages with different options at cutting technologies.