POLY SHOPPING BAG

Injection molding uses pressure to push molten petroleum jelly through a nozzle
to make structures with circular orifices that are later filled with plastic
material. The plastic substance is then given heat and water to melt, creating a
spherical hollow container that is forced against revolving drums to create a
bag. The finished circular containers are placed in bins where they are processed
until they meet the requirements and are prepared for shipping. A molding
machine can now make more intricate designs without slowing down mass
production thanks to advances in technology. For instance, bags are created by
melting together plastic film. They are put together, heated by steam, and then
pressed to take on the desired shape. To create the desired product, plastic
films are placed on rotating rollers.