Advancements in high gravity compounds
A
RTP Company product story
Edited by the Engineeringtalk editorial team
Jun 3, 2004
Heavy-weighted HGCs provide improved processing capabilities for manufacturers of lead replacement products with increased lot-to-lot material consistency and better consistency within lots.
RTP Company has made advancements in high gravity compounds (HGCs) for lead replacement applications that typically fall within density ranges of 5 to 11g/cm3.
These heavy-weighted HGCs provide improved processing capabilities for manufacturers of lead replacement products with increased lot-to-lot material consistency and better consistency within lots when compared with other HGCs.
With the advancements in HGC technology, the company can formulate grades with lower viscosity which result in improved flow during processing.
"Lower viscosity can help with filling thinner walls, more intricate designs, and can improve surface finish of moulded pieces", said Karl Hoppe, RTP Company Product Development Engineer.
"Lower viscosity can even improve thermal stability, as it takes less shear heat to get the material to flow".
Performance improvements are the most dramatic in the highest specific gravity materials which are typically in the density ranges of 9 to 11g/cm3 and are compounded with nylon.
This technology has been expanded to improve viscosity in other resin systems, including thermoplastic polyurethane elastomer, polypropylene and Peek.
The firm works closely with companies to develop high quality lead-free alternatives in the automotive, ammunition, recreation and medical industries.
Applications include wheel weights, projectiles, fishing sinkers and radiation shielding.
The company also develops HGCs for products that typically used metal for weight manipulation.
Many of these products are sporting goods where density-controlled compounds improve the performance of bats, golf clubs, racquets and footwear.
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