Fireproof fabrics like FR fabrics and Fire retardants can be mixed together to create something called Threaded Flame Retardant Fabric (TFR), which is essentially a material that can resist fire from spreading in certain areas. In fact, the only similarity between these two is their fire resistance, which means when a flame is sparked, fire follows it. So if there's no flame, there's no fire, just more fabric.
There are three different classes of flame retardant textiles available on the market today, all of which provide different levels of protection. One of these classes is the NFA, or non-flammable fibres. This is a class which has been made to be compatible with a wide range of products, including clothing and other fabrics. So long as the clothing you wear is not made from an unprotected textiles, the fibres in the fabric are completely safe. These fibres are also highly flexible, meaning that manufacturers can make them in a range of different colours, sizes, shapes and designs.
A second class of fabric is known as the FHR, or flame retardant hydroxyl fibre. This is an extremely tough fabric, capable of withstanding extreme heat, but can also handle mild to moderate heat. This class of fabric comes in a variety of different materials, including nylon, cotton, rayon, and viscose. Like the NFA, the FHR fabric is flame resistant, but doesn't stand a chance of melting or burning when exposed to flames. It is also highly flexible, meaning manufacturers can produce them in a large range of different colours and shapes.
A third class of fabrics are known as UVC treated flame retardant fabric. Like the FHR, the UVC treated flame retardant fabric is not capable of absorbing or releasing heat but will become flammable if exposed to flame. The main benefit of this type of material is that it does not create any gases, so it poses no threat to people in the area. Manufacturers who use this class of material will often use it on their fabrics for cars and other high temperature items. It is important to remember though, that these fabrics are still highly toxic, and they should not be used around an open flame.
An additional class of fabric is known as multi-fiber. These are specially made fabrics, made to be able to resist many different flame retardant fabric classes. Many manufacturers use these in their clothing, because they are far more durable than most other varieties of flame resistant fabric. There are many different multi-fiber fabrics available, including denim and flame resistant leather jackets.
There are also two other classes of fabric that are often referred to as flame retardant. One is known as the unprotected Burn Jacket, and it uses special thin film technology that creates an outer layer that is able to withstand the extreme heat of a flame. The second is called the unprotected Burn Jacket and uses even less special technology than the protected Burn Jacket. Basically, both of these jackets are able to provide the same amount of protection, because they both have a flame resistance concentration of up to 401%. Both of these jackets can also withstand the direct heat of a fire, up to a point.
The final class of flame-retardant fabric is known as fire-resistant coatings. These are generally applied to materials that are not combustible, like plastic, rubber, and vinyl. These coatings will not catch fire on their own but will burn when exposed to intense heat for long enough times that it deteriorates into a sort of black oxide. Once this happens, however, they can still continue to protect people from fire since black oxide is also flammable. However, they may not be able to withstand hot temperatures for long enough to be practical.
In order for a textile flame resistant garment to pass EPA standards, it must contain at least one of the classes listed above. In addition, it should also contain one of the other categories, in order to make sure it complies with environmental conditions. For example, materials with PVC backing should not contain plastics. Materials that have a certain percentage of petroleum need to be in a petroleum solvent blend, while wool fabrics need to have woolen based products mixed with them.