Flame retardant Stanyl® meeting electrical industry needs

UL classifications
A number of flame-retardant grades have been developed, rated V-0 according to the Underwriters Laboratories UL 94 classification [even at 0.35 mm (0.01 in)]. These include High Flow flame retardant grades. For many of these grades 50-100% regrind V-0 ratings have been obtained which gives advantages through lower waste generation and lower material costs. Unmodified, unreinforced Stanyl grades are rated V-2 and the glass fiber reinforced grades without flame retardant are rated HB. Other classifications according to a number of UL standards have been obtained for different Stanyl grades.

In the table below the most important ratings according to UL 1446 have been summarized. Noteworthy is the class H [180°C (355°F)] rating according to UL 1446 for the glass fiber reinforced grades of Stanyl. A complete overview of all UL listings is available at your local DSM sales officeor at the UL web site.

UL 1446 insulation system recognition for Stanyl.

Flammability
Flammability of materials can also be expressed in terms of glow wire ignition temperature and glow wire flammability index. This is to simulate the short-term effect of thermal stresses caused by e.g. heat sources (heating elements) or overloaded resistors. Testing of end products is required in safety standards for all kinds of electrotechnical equipment.

Glow wire ignition temperature and glow wire flammability index can be used for pre-selection of materials for such applications. Both glow wire ignition temperature and flammability index depend on the thickness of the samples and the specific grade. For an overview for Stanyl grades see the table below (measured according to IEC 60695-2-12 GWIT and IEC 60695-2-13 GWFI) or more detailed information is available in the product database.

Stanyl glow wire flammability index.