No treated polyester fabric available on the market meets the required FR tests. In fact, treated polyester may melt and drip when exposed to flame. In addition, OSHA has forbidden polyester in work clothing exposed to electric arc for almost 15 years. As a result, OccuNomix no longer manufactures any polyester-based FR products.
The video below depicts 2 vests in a simulated arc situation. Vest on the left is a modacrylic flame resistant vest. Vest on the right is a 100% Polyester treated "FR". As you can see, the vest continues to burn, melt and drip long after the flash. Note the flame burning next to the mannequin head. Both mannequins are wearing flame resistant undergarments. Typically, an individual in a polyester treated garment would not wear a true flame resistant undergarment. This incident would have exposed the wearer to burns - or worse.
OccuNomix FRP products are sewn with flame resistant thread (Nomex® or Kevlar®) and most contain Nomex® zippers. FRP products contain either 25-50 wash FR cotton, modacrylic or brand names you can trust including Banox®, Proban®, Indura® and Nomex®.
We encourage you to remember the following when considering Flame Resistant products:
Check that all garment components and layers (including interior layers of winter liners) that may be exposed to flame are truly flame resistant.
Verify that the product has been tested to an appropriate apparel test, and note: