New technology from Macro Engineering & Technology Inc., Mississauga, Ont, gives processors the ability to foam particular layers on their coextrusion blown film lines. With individual layer foaming, processors get more flexibility to create a wider range of products on a single line by manipulating different foamed layer combinations within the film structure. Foaming can reduce product weight and resin consumption. It can also improve film properties such as thermal and sound insulation. Moreover, foaming lets processors create opaque products without the need for fillers or pigments, says Macro.
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