Eight years after delivering its fi rst commercial nine-layer spiral blown film die, Battenfeld Gloucester Engineering Co., Gloucester, Mass., launched a second generation of its multilayer spiral dies last year.

Eight years after delivering its fi rst commercial nine-layer spiral blown film die, Battenfeld Gloucester Engineering Co., Gloucester, Mass., launched a second generation of its multilayer spiral dies last year. The new EFT (encapsulated feed technology) Optifl ow die boasts shorter fl ow channels with less residence time, less risk of degradation or crosscontamination, and ability to make faster material changes, even though the die height is still 20 in. from resin entrance to die lip. The die allows LLDPE, nylon, and EVOH to be run interchangeably in the same channels. The fi rst new EFT die will be delivered in August to General Films Inc. in Covington, Ohio. The line will have two 2.5-in. and seven 2-in., 30:1 ContraCool Extruders with new shallow-groove feed sections. Called Light Groove Feed, this design is half-way between standard grooved and smooth bores. It uses a smooth-bore type screw but reportedly can provide steady output of soft plastomers, reground fl uff, and unlubricated nylon without locking up, which saves the expense of lubricated resins. The EFT die and Light Groove Feed will be offi cially introduced at the K 2007 Show in Dusseldorf in October. The EFT die is available for testing on a nine-layer lab line at Gloucester. Tel: (978) 282-9268 . www.bge.battenfeld.com

Battenfeld Gloucester
Blackburn Industrial Park
P.O. Box 900 Gloucester, MA 01930
Phone (978) 281-1800