The program is described in UL 94, the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, which is now harmonized with IEC 60707, 60695-11-10 and 60695-11-20 and ISO 9772 and 9773.

UL 94 is a safety standard to determine the flammability of plastic materials. This test is released by Underwriters Laboratories of the United States. It measures: The ability of the plastic part to extinguish or spread the flame after ignition.

2019年7月15日 · Two UL 94 ratings that code officials commonly run across are HB and V (V-0, V-1, or V-2). These ratings are established using small-scale tests in which approximately 5 by ½ inch samples are subject to a ¾ inch, 50W tirrel burner flame ignition source.

2019年3月1日 · What is UL 94? UL 94 is a plastics flammability standard released by the Underwriters Laboratories (USA). The standard classifies plastics according to how they burn in various orientations and part thicknesses from the lowest flame-retardant to most flame-retardant in six different classifications.

2021年6月9日 · UL 94 is a widely-used plastics flammability test created by the Underwriters Laboratories (UL) that measures how a plastic part burns and how well it prevents flames. A plastic’s flame resistance can be improved upon through the use of additives, which are compounds added to plastics to reduce flammability.

As related to plastic materials offered by Professional Plastics, there are 6 Flame Classifications Specified in UL 94 that are assigned to materials based on the results of these small-scale flame tests.

Let’s shed some light on what the UL 94 Standard and its associated flammability ratings are and, more importantly, what they are not. Model building, life safety and fire codes include numerous requirements that products and materials include specified minimum flammability ratings.

2024年5月9日 · This encyclopedia article explains the classification and application areas of UL 94, the flammability safety standard for plastic materials. It provides a comprehensive understanding of device flame-retardant performance and enables informed decision-making in various usage scenarios.

UL 94 5VB: Stops burning within 60 seconds, no drips allowed, but may develop a hole. UL 94 5VA: Stops burning within 60 seconds, no drips, no holes—making it the most flame-resistant classification. 4. Specialized Tests for Foamed and Thin Materials. For materials such as foams and thin films, UL 94 HF-1 flammability ratings apply.

The first program is described in UL 94 which is now harmonized with IEC 60707, 60695- 11-10 and 60695-11-20 and ISO 9772 and 9773. The second test program measures the ignition resistance of the plastic to electrical ignition sources.