"Depending on the performance requirements of the final application," says Short, "sheet with this tie layer can be recycled back into the virgin TPO at levels of 20 to 30%. Low-temperature ductility is the main factor in determining the percentage of material that can be recycled."
Benefits to the thermoforming process
Bonding an acrylic cap to a TPO substrate with an ADDHERE tie layer increases the melt strength of the resulting sheet. Compared with that of a monolayer TPO, sheet sag in the thermoforming process is improved by up to 15%, depending on the thickness of the multilayer sheet. This means thermoformers will enjoy a broader process window, making it easier to achieve quality parts and to reduce scrap rates. In addition, the forming process itself actually strengthens the bond provided by the ADDHERE tie layer between the acrylic and the TPO layers.
Performance advantages of TPO/acrylic sheet
ADDHERE adhesive tie layer has been developed to work with three different extrusion-grade TPO and engineered polyolefin materials produced by Solvay Engineered Polymers: DEXFLEX(R) E118 thermoplastic polyolefin, SEQUEL(R) E3000 engineered polyolefin, and SEQUEL(R) E5800 engineered polyolefin. This selection of substrate materials provides a wide range of economical performance alternatives.
Acrylic/polyolefin sheet could provide advantages over the ABS, metal,
or fiberglass materials now employed in large, durable and decorative
applications. Compared with ABS, polyolefins exhibit superior
low-temperature ductility and resistance to stress cracking - particularly
in parts that involve movement o
|SOURCE Solvay Engineered Polymers, Inc.|
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