Foam Blow Molding Advances to Commercial Use
W. Muller’s three-layer coextrusion head, with nitrogen gas injected in the center layer, has found its first commercial application in large agro-chemical containers.
W. Muller USA is announcing the first commercial success for its foam blow molding technology. This technology, which was first revealed at NPE2015, utilizes a special head with two small vertical extruders for the solid inner and outer skins of the three-layer structure; the blow molding machine’s main extruder provides the center foam layer. A special feature of this process is that nitrogen gas is injected into the head, rather than the extruder barrel.
Muller’s news is that it has sold its first foam coextrusion head; the customer is Cimplast S.A.C.I. in Paraguay, which plans to use the head to mold 20-L agrochemical containers. Advantages of the foam-core process are not only lightweighting but also faster cycles, according to Muller.
Related Content
-
Get Color Changes Right In Extrusion Blow Molding
Follow these best practices to minimize loss of time, material and labor during color changes in molding containers from bottles to jerrycans. The authors explore what this means for each step of the process, from raw-material infeed to handling and reprocessing tails and trim.
-
Formulating LLDPE/LDPE Blends For Abuse–Resistant Blown Film
A new study shows how the type and amount of LDPE in blends with LLDPE affect the processing and strength/toughness properties of blown film. Data are shown for both LDPE-rich and LLDPE-rich blends.
-
Breaking the Barrier: An Emerging Force in 9-Layer Film Packaging
Hamilton Plastics taps into its 30-plus years of know-how in high-barrier films by bringing novel, custom-engineered, nine-layer structures resulting from the investment in two new lines.
