To find out how long it will take for flame-retardant heat shrink tubes to extinguish after being ignited, you must first understand the concept and flame retardant standards of flame-retardant heat shrink tubes. Flame-retardant heat shrink tubes do not stop burning, but prevent burning and stop the flame after leaving the fire source. spreads and extinguishes itself within the specified time. Most of the flame retardant grades of heat shrink tubing are VW-1, which uses the UL94 V1 vertical burning test standard.

    UL94 V1 flame retardant test method, after igniting the heat shrink tube, the heat shrink tube will extinguish itself within 60 seconds after removing the fire source. The melt is allowed to drip on the cotton mat, but no burning matter can drip, and the dripping matter cannot ignite. cotton.

    After understanding the flame retardant grade and standard of the heat shrink tube, the problem of how long it will take for the flame retardant heat shrink tube to extinguish will be easily solved. The minimum requirement for the flame retardant heat shrink tube is that it must be extinguished within 60 seconds after leaving the fire source, but after In fact, in the production and manufacturing of heat shrinkable tubes, the proportion of flame retardant used by heat shrinkable tube manufacturers will be greater than the test standard, so as to achieve excellent flame retardant performance, such as extinguishing in about 30 seconds, which has higher requirements for military standards. The heat shrink tube can be controlled to self-extinguish in about 10 seconds.

What material is flame retardant heat shrink tubing made of? How long does it take for heat shrinkable tubes of various materials to ignite and extinguish?

1. PE heat shrinkable tube uses polyethylene as the main material and adds a certain proportion of flame retardant according to the formula to achieve the purpose of flame retardancy. Flame-retardant heat-shrinkable tubes made of PE polyethylene, whether they are single-wall heat-shrinkable tubes, double-walled heat-shrinkable tubes or thick-walled heat-shrinkable tubes, the flame-retardant performance of black is better than that of other colors, and the extinguishing time is about 30 seconds.

2. The surface of polyvinylidene fluoride (PVDF) heat shrinkable tube is very glossy and hard in texture. It can easily cause creases when bent, so it is very easy to identify. PVDF is a resin material with high performance and high flame retardancy. It has very high transparency. It is also a transparent heat shrinkable tube that can be highly flame retardant. It can be ignited vertically and extinguished after leaving the flame in about 10 seconds.

3. The main material of the fluororubber heat shrinkable tube is elastomer rubber with a certain proportion of polyvinylidene fluoride added, so it is also called fluorinated rubber. The fluororubber heat shrinkable tube has oil resistance, high temperature resistance and high flame retardant properties, and its physical and chemical properties can reach military levels. Standard level, self-extinguishing time is about 15 seconds.

    The flame retardant standard used for heat shrink tubes is VW-1. The flame retardant level of the material itself is different, so the extinguishing time of heat shrink tubes produced from different materials is also different. The most commonly used PE polyethylene material has a self-extinguishing time of about 30 seconds, and military-grade heat shrinkable tubing can achieve a self-extinguishing time of about 10 seconds. Therefore, when purchasing heat shrinkable tubes, you also need to choose the corresponding heat shrinkable tubes according to your own product flame retardant requirements. Heat shrinkable tube manufacturers can also customize V0 flame retardant grade heat shrinkable tubes.