Nomex® IIIA: Lightweight Comfort in an Inherently Flame-resistant Fabric

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DuPont™ Nomex® brand fiber helps garment manufacturers offer the lightweight, comfortable protection workers are looking for. Nomex® helps provide outstanding flame resistance, but that’s not all. Fabrics made of Nomex® are extremely strong and durable, especially when compared to other materials such as flame-retardant treated (FRT) cotton. As a result, garments with Nomex® offer lighter weight for increased comfort and breathability.

Most of us think of cotton as a comfortable fabric. However, heavier, chemically treated cotton garments are not the same as your everyday cotton clothing. Chemical additives, which account for as much as 20% of the weight of the fabric, make the garment heavier than garments made of Nomex® IIIA fabric.

For example, coveralls made with Nomex® have manufacturers’ specified weights as low as 4.5 oz/yd2 and still meet applicable industrial standards. By contrast, the lightest weight Westex® UltraSoft® fabric must weigh 7 oz. to meet NFPA 2112. A garment made of UltraSoft® is almost one pound heavier than a garment made of Nomex®.

The table below shows the difference in weight for comparable commercially available fabrics of Nomex® and FRT cotton. (The actual weight of fabrics often differs from the manufacturers’ specified weight.)

The flame resistance of Nomex® fabric is not only built in—it helps manufacturers provide a lighter-weight, more comfortable garment. Nomex® fabric can help give workers lightweight comfort and outstanding protection.

 

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The information set forth herein is furnished free of charge and based on technical data that DuPont believes to be reliable. It is intended for use by persons having technical skill and at their own discretion and risk. Because conditions of use are outside our control, DuPont makes no warranties, express or implied, and assumes no liability in connection with any use of this information. Nothing herein is to be taken as license to operate under or a recommendation to infringe any patents or trademarks.