In the USA, a Davis-Standard Series 50 internal deckle die upgrade has significantly improved an extrusion coating line at the Propex facility in Nashville, Georgia. The new auto profile die has cut resin usage in coating on fabric from a +/-10 per cent profile tolerance down to +/- one per cent.
Propex staff engineer Joel Manacop says this tighter tolerance immediately reduced material costs and has improved quality. “In only a few months, this die has more than proven its worth. We took a 15-year-old Davis-Standard extrusion coating line and gave it an immediate boost with this upgrade. We have realized a cost savings of at least 20 per cent and have a more uniform end product,” he enthuses.
“In addition to performance, the best feature of this particular die is the ease of maintenance. You can clean it in place which is a big advantage.”
Other advantages claimed for the Series 50 include reduced edge bead for most grades of polymer, an internal deckle system, removable lips for die cleaning, externally mounted block heaters, and a larger body cross section to insure thermal stability at high output rates.
Propex has experienced significant growth in the retail markets for the conversion of fabric into bags, building materials, and house and lumber wrap. The company performs all the weaving and extrusion coating in-house. Its products serve the packaging, flooring, filtration media, automotive, recreation, agriculture, recreation, building materials and concrete systems markets.
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