International flame retardant standards
1. UL94: The standard developed by Underwriters Laboratories, which is used to evaluate the flame retardancy of plastic materials, including V-0, V-1, V-2 and other grades.
2. IEC 60695: Standard developed by the International Electrotechnical Commission (IEC) for evaluating the flame resistance of electrical equipment and materials, including HF-1, HF-2 and other grades.
3. GB 2408: Chinese national standard for evaluating flame retardant performance of plastic materials, including V-0, V-1, V-2 and other grades.
4. DIN 4102: German standard for evaluating the flame retardant performance of building materials, including B1, B2 and other grades.
Requirement criteria: from ignition after removing the flame the sample can quickly self-extinguish to no burning melt drips in a certain time gap (that is, burning melt drips on a one-foot cotton pad located below the test sample and cannot ignite the cotton). The key to greening flame retardant materials is the selection of flame retardants. The green and sustainable direction of flame retardants should be non-PBT, non-CMR substances, not bromine-free or halogen-free. Polymeric or macromolecular flame retardants have become the hot development direction of green flame retardants because of their inherent low toxicity and non-bioaccumulation in their structure. The flame retardant technology in China is basically on the same level as the advanced countries abroad, and the flame retardant requirements of various flame retardant products are also formulated with reference to the similar standards of developed countries.
In addition to the above standards, there are a number of other international standards and industry standards, such as ASTM, ISO, EN, etc., which are also used to evaluate the flame retardant performance of different materials and equipment. In practical applications, it is important to choose the right flame retardant standard and grade according to different usage occasions and safety requirements.
