Materials | technology CONDUCTIVITY


Conductive compounds add ESD protection for extrusion


RTP has expanded its line of conductive compounds to include grades for extrusion processes and applications. Its conductive extrusion


compounds are made on dedicated manufacturing equipment designed to ensure uniform carbon black disper- sion, said RTP, for consistent electrical conductivity and electrostatic discharge (ESD) protection.


Many applications require


consistent ESD protection, excellent physical properties and flawless surface appear- ance, even in thin extrusions. Physical properties and surface appearance can be compromised if the conductive carbon is not consistently dispersed. In addition, thin extrusions require carbon loadings to be accurately


NYLON Nylon 66 pipe is fast to install


Invista has introduced a nylon 66 homogenous single wall line pipe that withstands high temperature and pressure while being fast to install. Its Raptor pipe can work at


temperatures up to 200 degrees Fahrenheit and pressures up to 500 PSI, it says. “We found market demand


for a line pipe that was tough enough to handle the oil patch and perform daily under rugged conditions, but could be installed quickly,” said Vikram Gopal, vice president of


www.pipeandprofile.com


technology. Installation typically


requires a fraction of the time needed to install other line pipe such as steel, says Invista. Ease of installation is en- hanced by reliable connections with standard butt-fusion tech- nology and a range of available transition fittings. Raptor comes coiled in up


to 2,000-foot sections that are ready for the ditch and suitable for applications ranging from multiphase flow lines to low pressure natural gas gathering


and water transportation. It includes 2, 3, 5 and 6in IPS and SDRs 7, 9 and 11. Six-inch pipe is expected


to be available later this year, says the company. Key features of the pipe


include: fast installation with coils; no need of de-rating for liquid hydrocarbons; higher abrasion resistance than steel and HDPE; and, better impact resistance than fibreglass, HDPE and their composite pipes. ❙ www.invista.com


PLASTICISERS


Bio-based compound to replace PVC


Sylvin Technologies has developed a series of phthalate-free, bio-based compounds that can replace general purpose PVC. Made from renewable


controlled to maintain consistent conductivity over the entire product. “Extrusion compounds


require special attention to both formulation and manu- facturing details,” said Neil Hardwick, marketing manager for conductive products at RTP. Popular applications for


flexible conductive extrusion compounds include vacuum hoses, ESD tubing and


geomembrane films. Common applications for rigid extrusion compounds include industrial pipes and ESD packaging sheet. The compounds can be


engineered to provide the necessary conductivity and mechanical properties, which can be incorporated into a range of elastomeric and rigid resin systems. ❙ www.rtpcompany.com


feedstock, Sylvin’s 32 series is formulated with a plant- based plasticiser rather than traditional products such as phthalates. Its bio-based compounds have the same feel, flexibility and ease of processing as traditional flexible vinyl compounds, it says. Compounds are available as clear or custom-coloured variants, and are developed to meet most conventional PVC compound applications. The bio-based compounds


provide a number of key performance characteristics: reduced density; improved plasticiser migration properties; same processing conditions as general purpose vinyl; phthalate-free; and competitively priced. Sustainability benefits of the 32 series include substantially reduced volatile organic compounds (VOCs), reduced water and energy consumption throughout life cycle, and lower carbon footprint.


The 32 series products


were launched at the recent MD&M West show in the US, where it also showcased examples of its flexible vinyl compounds, including its 2990 Clear series for flexible tubing. ❙ www.sylvin.com


October 2014 | PIPE & PROFILE EXTRUSION 45


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