WEB EXCLUSIVE: Lanxess (U.S. office in Pittsburgh) recently determined that peelable adhesive films can be produced with its Levamelt ethylene vinyl acetate rubber (EVM) by coextrusion with polyolefins instead of the more capital-intensive process of coating Levamelt onto a PE or PP carrier film. Lanxess is the only producer of flame-retardant EVM elastomer, which is used to make adhesive films that peel away without leaving any residue. Until now, coextrusion was not thought possible because of the considerable difference in MFR between EVM and polyolefins. But Lanxess determined that their viscosities are compatible at actual processing shear rates. During the K 2010 show this month, a live demonstration will be conducted at the Sankt Augustin, Germany, plant of extruder maker Kuhne GmbH. The three-layer film consists of LDPE, EVA tie layer,and 15-micron layer of EVM.
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111 RIDC Park West Dr Pittsburgh, PA 15275
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