EoW May 2010

technical article

[2] “Thermoplastic elastomers, a comprehensive review,” edited by G Holden, H Kricheldorf, and R Quirk, Hanser Publishers (2004), third edition [3] www.albemarle.com [4] UL 94, page 15, material classifications [5] “Micro-calorimetry: the pyrolysis combustion flow calorimeter”Fire Testing Technology Ltd on line [6] UL 1581, page 181 for VW-1 flame test and 1061 cable flame test [7] V Babrauskas, in“SFPE handbook of fire protection engineering,” 2 nd edition, National Fire Protection Association, Quincy, MA 1996 [8] “Metallocene-based polyolefins: preparation, properties, and technology” edited by J Scheirs andW Kaminsky, John Wiley (2000) (hardcover) [9] T C Chung, T C Mike Chung, “Functionalization of polyolefins,”Academic Press (2002) [10] G Holden and N R Legge, “Thermoplastic elastomers based on polystyrene polybutadiene block copolymers,” in “Thermoplastic elastomers, a comprehensive review,” edited by N R Legge, G Holden, H E Schroeder, Hanser Publishers, 1987 [11] “Flame retardant materials”edited by A R Horrocks and D Price, Woodhead Publishing Ltd Cambridge, England (2001) [12] “Fire retardancy of polymeric materials” edited by A F Grand and C AWilkie, Marcel Dekker, 2000 This paper was first presented at the 57 th IWCS and is reproduced with the permission of the organisers.

Peak heat release rate, kW/m^2 Flame out, seconds

Increasing combined FR Technologies

PHHR or Flameout time

control

Exp 1

Exp 2

Figure 5 ▲ ▲ : Cone calorimeter data for combined FR technologies

Figure 6 ▲ ▲ : The retention of an indicator flag of EL-1392B wire upon 1061 flammability test

Figure 7 ▲ ▲ : The retention of an indicator flag of an EL-1392B cable upon 1061 cable flammability test

Figure 8 ▲ ▲ : A coil cord using EL-1392B for insulation and jacketing

4 Conclusions A combination of the availability of new polymer materials and flame retardant technologies offers the ideal timing for the development of RoHS-compliant enhanced flame retardant TPEs. New FR compounds extend the perfor- mance range beyond that of conventional FR TPEs. They pass UL 94 V-0 rating at 0.06" and meet VW-1 and method 1061 wire and cable flame tests without dripping. These are achieved with good low temperature flexibility, a good retention of tensile properties upon heat ageing, and also showing excellent electrical properties. New FR compounds are ideal for flexible cords, coil cords, robotics cables, power

tools, high-flex cables, low temperature applications, and connector parts and components requiring a V-0 flame rating. The improved flame retardant capability of these SBC compounds is due to formulation techniques that modify melt viscosity, and char formation. n 5 Acknowledgments The authors would like to thank Teknor Apex for permission to discuss this work.

Teknor Apex Company Fax : +1 401 725 8095

6 References

Email : info@teknorapex.com Website : www.teknorapex.com

[1] S Sakhalkar, D Worley II, B-L Lee, S Daniels, J-W Shin, “TPE product innovations designed to create new product opportunities for users,” SPE TPE division, TOPCON, 2007

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EuroWire – May 2010