When you go to a local grocery store, and the checkout attendant is bagging your groceries, they are often putting your groceries into a plastic bag. In fact, when you go to any type of store where you have smaller items, the ones that you purchase are often carried out in a plastic bag. Some people may wonder how these plastic bags are made. They are often in bundles and are conveniently able to expand and open up. The process itself is multifaceted, leading to those simple plastic bags that we all use and rely upon. Let’s go over the process of how plastic bags are made so that you can understand how complex this process is.
How The Process Begins
Plastic bags begin with a liquid resin that is both a high and low density. These materials are stored in very large silos. Once the plastic bag manufacturer is ready to make the plastic bags, they will mix both of these resins, and then the process of making the bags can begin. The resin mixture will go through what is called extruders. It is here that the resin is heated to a specific temperature. It will become molten, and in this hot form, will be blown into a type of bubble. The bubbles are not small at all. They can literally be as large as a three-story building. After that, the resin will cool, and will subsequently be sent through a series of rollers which will press the resin flat and create several-thousand-pound rolls of plastic that is called a film.
How This Resin Becomes A Plastic Bag
Once the resin is rolled up, it is then placed into an unwinding machine. Electrostatic current is then sent through this solidified resin. This will allow any type of printing to occur, allowing the manufacturer to create bags for specific customers. This could include the name of the company, its logo, and any type of slogan that they want. After that, each individual bag is created by cutting the role of plastic into specific sizes. These are then sent into an aptly named bag manufacturing machines. It is here that the bottom and top seals on the bags are applied. They will also cut out handles which are essentially holes at the top of the bags. The leftover material will then be recycled. All of these bags are then conveniently connected together and packaged for shipment. The bag manufacturers will have different templates for each company based upon what they want to be printed and how large or small the bags will be.
Although this is a brief overview of the plastic bag manufacturing process, you can see that this is a multifaceted procedure. It entails the use of very large facilities that will have the capacity for the specifically designed machinery that can create plastic bags by the millions on a daily basis. The next time that you go into a department store or grocery store, and you receive a plastic bag, you now know how complex the process is for providing you with the bag you are carrying.