DFDA-5445 BK is a flame retardant carbon black-filled master-batch for use with SI-LINK® PE that can be used in large cables requiring UL-44 horizontal burn flame performance. This product is formulated to pass Horizontal Burn XHHW-2 on larger cables.

Specifications
DFDA-5445 BK, is used at 35% in conjunction with 60% SI-LINK Cross-linkable Polyethylene DFDA-5451 NT and 5% DFDB-5480 NT Catalyst Master-batch on size 2 AWG conductors and larger. At these concentrations the necessary properties, including flame retardance, the requirements for XHHW-2, RHW-2 and RHH cables as defined by UL-44 and UL-1571, as well as Underground Service Entrance (USE-2) as defined by UL-854 and UL-1581 are met. Horizontal burn performance has been successfully demonstrated on sizes as small as 6 AWG with higher concentrations of DFDA-5445 BK.

DFDA-5445 BK is a highly filled black flame retardant master-batch for addition to the standard SI-LINK PE base resin (DFDA-5451) and catalyst (DFDB-5480) moisture cure system. DFDA-5445 BK offers flexibility in tailoring the formulation to meet the horizontal burn requirement on a range of cable sizes. Typically, a usage level of 55% for DFDA-5445 BK will pass the horizontal burn test down to size 6 AWG; a usage level of 35% will pass the horizontal burn test down to size 2 AWG. The economics of the formulation may be optimized for a particular application depending on the cable sizes produced and the UL submittal sizes selected. Such factors as processing conditions, degree of cure and type of conductor can affect the results, so cable manufacturers must determine the optimal formulations for their applications.