Disc Die for Blown Film Grows to 18 in. Diam.

The modular disc blown film die was commercialized by BBS Corp., Spartanburg, S.C., in the late 1990s in small sizes (up to 9 in. diam.), mostly for R&D applications.

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The modular disc blown film die was commercialized by BBS Corp., Spartanburg, S.C., in the late 1990s in small sizes (up to 9 in. diam.), mostly for R&D applications. Now it has been scaled up to 18 in. diam. The larger die has 25 disc cells to make film with 25 microlayers from three extruders (two 65-mm, one 50-mm). Melt from each extruder is split in three for a total of nine melt fl ows, each directed through one of the 25 cells. Output is up to 800 lb/hr. A smaller 9-in., 25-layer die in BBS's lab is running trials with alternating microlayers (see microscope view below) of LDPE and Topas cyclo-olefi n copolymer (COC) from Topas Advanced Polymers Inc., Florence, Ky. Topas wants to compare stiffness and other properties of microlayer fi lms with 14% and 25% COC to monolayer fi lms made from LDPE/COC blends. BBS: (864) 579-3058/e-mail bbsc@infoave.net . Topas: (859) 746-6447/www.topas.com

Topas Advanced Polymers, Inc.
8040 Dixie Highway Florence, KY 41042
Phone (859) 746-6447 Fax (859) 520-4404