How it is made?

Most Plastic bags are made from polyethylene - more commonly known as polythene, which is made from crude oil and natural gas, non-renewable resources.

The most common way to produce polythene bags is by blown film extrusion, also called the "tubular film process."

In Blown film production process - polythene melt is extruded through an annular slit die, usually vertically, to form a thin walled tube. Air is introduced via a hole in the center of the die to blow up the tube like a balloon. Into the tube causing it to expand and form a bubble. Mounted on top of the die, a high-speed air ring blows onto the hot film to cool it. The tube of film then continues upwards, continually cooling, until it passes through nip rolls where the tube is flattened to create what is known as a ' lay-flat' tube of film. This lay-flat or collapsed tube is then taken back down the extrusion ' tower' via more rollers. The lay-flat film is then either kept as such or the edges of the lay-flat are slit off to produce two flat film sheets and wound up onto reels. If kept as lay-flat, the tube of film is made into bags by sealing across the width of film and cutting or perforating to make each bag. This is done either in line with the blown film process or at a later stage.

How many plastic carry bags in one kg?

This is as simple as calculating number of toffee we'll get in certain amount. Basically this depends on micron of the plastic,

For better understanding suppose we have plastic of 30 micron and the size of the bag is 20 cm X 30 cm. One more thing we should know the density of the plastic used. Generally density of resins used to make plastic bags are between 0.9 to 0.97. In our example let us suppose it is 0.95 then what will be the weight of the bag?

Let’s calculate