UL 94, the Standard for Safety of Flammability of Plastic Materials for Parts in Devices and Appliances testing, is a plastics flammability standard released by Underwriters Laboratories of the United States. [1] The standard determines the material's tendency to either extinguish or spread the flame once the specimen has been ignited.

可燃性 UL94 等级是应用最广泛的塑料材料可燃性能标准。 它用来评价材料在被点燃后熄灭的能力。 根据 燃烧速度 、燃烧时间、抗滴能力以及滴珠是否燃烧可有多种评判方法。 每种被测材料根据颜色或厚度都可以得到许多值。 当选定某个产品的材料时，其UL等级应满足塑料零件壁部分的厚度要求。 UL等级应与厚度值一起报告，只报告UL等级而没有厚度是不够的。 HB：UL94标准中最低的阻燃等级。 要求对于3到13毫米厚的样品， 燃烧速度 小于40毫米每分钟；小于3毫米厚的 …

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.

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. The second program measures the ignition resistance of the plastic to electrical ignition sources.

The UL 94 standard, developed by Underwriters Laboratories (UL), provides a comprehensive classification system to determine how plastic materials react when exposed to flame. If you are designing or selecting plastics, understanding UL94 ratings ensures compliance with safety regulations and reduces fire hazards.

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.

2023年2月28日 · An electronic document associated with a UL Standard for Safety or Outline of Investigation, and issued by UL to propose: A revision of a single or multiple requirement(s). A complete new edition of an existing Standard or Outline.

The UL 94 Standard provides a method for rating the ignition characteristics of plastic materials. Two UL 94 ratings that code officials commonly run across are HB and V (V-0,

The UL 94 Standard provides a method for rating the ignition characteristics of plastic materials. Two UL 94 ratings that code officials commonly run across are HB and V (V-0, V-1, or V-2).

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.