The production process of plastic bags is something you cannot ignore when learning what a plastic bag is. Immediately follow the standard process shared by Hanpak JSC immediately below.
Preparing PE granules
The first step to produce bags is to prepare natural white PE granules. You need to prepare the required number of beads and then add color particles such as red, green, yellow, orange, black …
Extrusion, blown film and roll forming.
This is an extremely important step that determines the success or failure of the whole process. Proceeding as follows, the PE granules, coloring granules are fed into the bag blower, then melted under controlled conditions of about 380 degrees F.
Then, extrusion is passed through a tube-shaped die of a bag blower, one end is fixed, and air is blown in to form a bubble. The process will last until the customer’s thickness and size requirements are met.
The blowing process will form the original shape of the plastic bag, this process takes place in the blower, the blown plastic films will form a 3m high bubble which is then cooled and run through the roll bar system. to fold the hips.
Cut into a plastic bag from a roll of film.
After blowing and winding the film, it will be transferred to the cutting unit to create plastic bags. The mechanism used is to use heat to create the bottom of the bag and cut the mouth of the bag with a stick knife or custom shape. Sometimes according to the specific requirements of the customer, this step will be processed manually.
Steps to print plastic bags.
Next, the film roll will be passed through the plastic bag printer. At this time, depending on the approved design, the bag printing process will be handled by screen printing, flexographic printing or gravure printing.
Finished product.
To complete the finished product, make plastic bags, but we often go through the final stages such as cutting, folding, marking, stamping straps, attaching straps …
Above is all the information about what plastic bags are, their classification and the process that you need to know. If you still have questions or need to design and print plastic bags with your logo and company information, please contact via info@hanpak.com.vn. Hanpak JSC is always pleased to welcome and serve you.