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TPO Compounds
November 2002
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A new Telcar® thermoplastic olefin (TPO) compound for flexible cord insulation has received an Underwriters Laboratories (UL) component recognition for wet-location uses, as has an established, harder grade of the same TPO. The two TPO compounds are Telcar 3050 (with 75 Shore C Durometer rating) and the new, softer grade Telcar 3050-88 (88 Shore A). Tested in water for 7 days at 65°C (149°F), the 3050 grade retained 99 percent of original tensile strength and 103 percent of original elongation, with weight change and volume swell of +0.38 percent and +0.34 percent, respectively. The same grade exhibited a -60°C (-76°F) brittle point (ASTM D-746). The UL component recognition for these compounds makes them suitable for submersible pump cable and SE, SJE, and SVE flexible cords with minimum insulation thickness of 30 mils and a wet rating of 75°C (167°F).

The Thermoplastic Elastomer Division of Teknor Apex


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