- Resin Pellet – Polymer bags begin as resin pellets. Resin can be completely new virgin resin, or recycled resin.
Containers of polymer resin pellets. Resin pellets are melted and blown – The resin is then heated to a liquid state and blown with a stream of hot air through a ring die to create a tube of polymer film. Resin is melted and blown into film.
2. Extrusion: The continuous tube of film is cooled and flattened through a series of rollers. Film extruded by rollers
3. Cutting and folding – The film tube is cut and folded in various shapes. The film is then spooled onto rolls in predetermined lengths. Film is folded along more rollers
4. Conversion – Rolls of film are converted into individual or blocks of bags by cutting and/or sealing. Measured stacks of bags are configured for specific applications and packaged for shipping. The machine width decides the maximum and minimum width of the bags can be made.
Source: Internet Data