Plastic bags can mean just about any bag right? Callancote provides their customers with a range of plastic bags that vary from a traditional carrier bag, to poly mailers and poly bags. A plastic bag is made of thin material and is found in most shops to carry items you have just purchased. Most come with a handle making it easy to carry.
The Plastic Shopping Bag
Wikipedia explains plastic bags: Plastic shopping bags, carrier bags, or plastic grocery bags are a type of plastic bag used as shopping bags and made from various kinds of plastic. In use by consumers worldwide since the 1960s, these bags are sometimes called single-use bags, referring to carrying items from a store to a home. However, reuse for storage or trash is common, and modern plastic shopping bags are increasingly recyclable or biodegradable. In recent decades, numerous countries have introduced legislation restricting the sale of plastic bags, in a bid to reduce littering and plastic pollution.
What are plastic bags made from?
Traditional plastic bags are usually made from polyethylene. which consists of long chains of ethylene monomers. … The polyethylene used in most plastic shopping bags is either low-density (resin identification code 4). Or, more often, high-density (resin identification code 2).
There are two major types of plastic shopping bags. Lightweight, checkout-style bags are most commonly found in supermarkets and takeaway stores. These are made from high density polyethylene or HDPE. The heavier, tougher plastic bags found in boutique and department stores. These are made from low density polyethylene or LDPE.
How are plastic bags made?
Let’s start from the beginning and run you through it:
The plastic bag making process begins when high and low density resin travels from our silos where it is stored and is blended together, following specific recipes. Once the resins are blended it reaches the extrusion department. This is where the film for the plastic bag will be created.
The blended resin is fed into extruders where the material is heated to a specific temperature and mixed. The material in the heated barrel then reaches a molten plastic state and can literally be blown overhead from the extruder into a bubble formation. Pretty cool right? Who knew plastic bag making was so interesting.
- The bubble is blown vertically 3 stories high. This allows for the proper material distribution and cooling time required before the film is laid flat.
- The final step in the extrusion process sends the bubble through a series of rollers to lay the film flat and then wind the film on large cores, resulting in a roll of film weighing several thousands of pounds.
- Next, the roll of film reaches the converting department, the area where film is manufactured into bags. The roll of film is placed into the unwinder. After the film is started on the unwinder, it is treated with an electrostatic wave of current. This is done so that the film can be properly prepared for the printing procedure, where bags are printed with various messages and logos for our customers.
- After the printing process is complete, the large roll of film is then cut to size with hot knives. This seams the sides of the bags together when cut.
- Then, the film is fed into bag manufacturing machines where the top and bottom seals are formed and the handles are cut out.
- And there you have it! The plastic bags have been created and are then distributed to our customers!