Cast film line
Cast Film Line equipment is the first piece of major equipment in a converting line. It transforms plastic resin to film. The process of transforming plastic resin to film is either done by Cast Film Line or Blown Film Extruders. Sometimes Cast Film Line is also referred to as Cast Film Extruder. The two types of equipments, the Cast Film Line and the Blown Film Extruder, generally speaking, are capable to produce plastic film of same properties. The difference between the applications of the two equipments is that the earlier one is typically used for very large volume production, whereas the later ones are more economical where shorter runs are required. Cast Film Lines can have three to four times higher through speed than Blown Film Lines and also the maximum film width they produce tend to be wider, reaching in some cases 25 feet.
The main technological process of the Cast Film Line is the following. Resin is fed to the blenders. A machine has as many blenders as many layers they are capable to produce. (Most advanced machines are capable to produce barrier film of seven to nine layers.) The screw transports and melts the resin then the T-die shapes it to very thin layer of film. The final web structure is stabilized by the quench roller. The out of the machine is winded film.
Crucial part of the technology the deployed heat and tension control system. As the resin is melted, the material needs to go through a very accurately controlled cooling process in order to produce very thin layers of homogeneous film. Layer thickness, depending on the plastic film type can vary between couple of µms to 100 µms. Also, as the material runs through the machine at a very high speed, very accurate tension control is paramount; otherwise the film of the winded coil won’t be homogenous.
Examples
- Pouch bag making machines for producing a variety of barrier pouches: three-side seal, back-seal, vacuum or stand-up pouches.
- Plastic blown film extrusion equipments capable to produce a wide range of PE and PA based barrier and non-barrier films. Mono to nine-layer extruders.
- Plastic bag making machines for the manufacturing of a comprehensive range of plastic bags: Side-seal and bottom seal bags with any type of bag features like different handle types; wicketed or staple stacking; gusseting; perforated grocery rolls; flower bags; courier bags.
- Slitter rewinders: for plastic film trimming and slitting and rewinding at high speed and high process accuracy.
- Corona treaters for the surface treatment of a wide range of plastic film width. High, mdeium and low power machines for different web widths.
- Cast film extrusion line for high volume manufacturing of plastic barrier films.
Market info
One of the North American converting line machinery suppliers is Plastic Equipment Co.
See also Plastic Equipment Co. in MyWikiBiz.
Businesses related to Poly Bag Making Machines will identify themselves by the following 5-digit NAICS codes:
References
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See also
plastic pouch bag making machine poly pouch bag machine three side seal poly bag stand-up pouch bag machine high barrier property poly pouch bag machine
