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Monday, May 12, 2008 | |
 Extruders (Barrier Screws)Enhanced Film Structures With More Layers Incorporating more layers with dedicated extruders gives more flexibility and saves money. For instance, an ionomer skin layer can be split into two layers by substituting a less expensive commodity resin for a high cost ionomer resin in the bulk of the skin in the bulk of the skin and still achieve the excellent sealing properties of the ionomer. By adding more layers to the structure in this way, the film is made stronger and more economical. Encapsulating and EVOH layer with two thin layers of nylon will result in a film with superior barrier properties while maintaining the puncture resistance and strength of the polyamide. The polyamide layers will provide added support for the EVOH and thus improve the flex crack resistance of the film structure. Furthermore, combining EVOH and polyamides right next to each other reduces odour and oxygen transmission in a meat packaging. |
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