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Home > Helpful Articles>What Makes FR Fabric Different From Other Fabrics? |
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What Makes FR Fabric Different From Other Fabrics?Regarding non-FR fabrics, the US Consumer Product Safety Commission has a minimum standard regarding clothing flammability (Flammable Fabrics Act of 1955). Basically, they test a 2 by 6 inch strip of cloth and see how long it takes to burn up. If it takes less than 3.5 seconds (for plain cloth), or 4 seconds (fabrics with a raised surface), that textile cannot be used in any wearing apparel in this country. Just to give you an idea, silk has a relatively high burn rate, wool a relatively low one. FR textiles either contain a special flame retardant chemical, or are inherently fire-resistant. The former category means their resistance to flame may not be permanent after a certain amount of washings. The National Fire Protection Association has put forth a Standard for Flame-Resistant Garments for Protection of Industrial Personnel Against Flash Fire. This is sometimes referred to regarding FR fabrics. It means, among other things, that no more than 4 inches of a fabric can be destroyed by a flame in 2 seconds. Passing a Thermal Stability Test means the fabric must not ignite or melt after 5 minutes in a 500 degree oven. The standard also includes a Mannequin Test which uses a complex of heat sensors. The unfortunate dummy is dressed in the FR fabric to be tested and exposed to a flash fire for a few seconds. Body Burn is not to exceed 50%. Bear in mind, though, that this test may not be carried out exactly the same way by different test groups at this time as it is a newer test. |
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