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Anonymous users2024-02-15The cotton is not burned, the sample is not burned out, the burning time of the sample strip is not more than 30s, and the burning time of T1 T2 is less than 10s, as if it is so.
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Anonymous users2024-02-14UL fire rating 94 V0 flame retardant effect:
The sample quickly self-extinguishes from ignition and removal of the flame to a non-flammable melt dripping for a certain time interval (i.e., the burning melt dripping on a cotton pad located one foot below the test sample cannot ignite the cotton).
Introduction to UL Fire Rating:
UL certification is a general term for the various certifications carried out by Underwriters Laboratories in the United States. There are two ways to certify the flammability of plastics: one is the UL 94 V0, V1, V2, V5 that we usually see the most, which is the test method for vertical combustion; The other is UL94 HB, which is rarely seen in general, which is a method of proficiency testing.
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Anonymous users2024-02-13UL94V-0 refers to the fire rating (flame retardant rating) of plastic materials.
The flammability UL94 rating is the most widely used standard for the flammability performance of plastic materials. It is used to evaluate the ability of a material to extinguish after being ignited. There are several ways to judge whether the beads are burning or not, depending on the combustion rate, burning time, drip resistance, and whether the beads are burning.
Many values can be obtained for each material to be measured, depending on color or thickness. When the material of a product is selected, its UL rating should meet the thickness requirements of the wall section of the plastic part. The UL rating should be reported along with the thickness value, it is not enough to report the UL rating without the thickness.
The flame retardant grade of plastic is gradually increased from HB, V-2, V-1 to V-0
HB: The lowest flame retardant rating in the UL94 standard. It is required that the burning rate is less than 40 mm per minute for samples thick from 3 to 13 mm; Samples less than 3 mm thick with a burning rate of less than 70 mm per minute; Or extinguish in front of a 100mm sign.
V-2: After two 10-second burn tests on the sample, the flame is extinguished within 30 seconds. It can ignite cotton wool up to 30 cm.
V-1: After two 10-second burn tests on the sample, the flame is extinguished within 30 seconds. Do not ignite cotton wool below 30cm.
V-0: The flame is extinguished within 10 seconds after two 10-second burn tests on the sample. No incendiary material can be dropped.
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Anonymous users2024-02-12It is a flame retardant material, and the flame retardant grade is required to be V-0.
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Anonymous users2024-02-11ul94v-0
It is a V-0 flame retardant rating in UL94 standard.
For details, please refer to the UL94 standard.
Flame resistance classification: A plate-shaped specimen with a length of about 127 mm and a width and thickness of one end is kept horizontal, and one end is in contact with the flame for 20 seconds, then removed and measured until the flame disappears, and if it is not extinguished for more than 180 seconds, it is considered flammable. After the flame disappears, the burning length of the specimen is measured, and the length is less than 25mm >>>More
UL is the Underwriters Laboratories IncShorthand for ). UL Safety Laboratory is the most authoritative in the United States and the largest non-governmental organization engaged in safety testing and identification in the world. >>>More
It seems that only Meihua is qualified to do UL certification in China! Your samples they accepted are also to be sent to the United States for laboratory testing, the cost of UL is quite expensive, if your customer asks you to do it, no matter how expensive you have to do, but I suggest that if you don't know UL very well, it is best to find a consulting company to do it, which can avoid you from taking more detours, because what you need to do UL doesn't matter, as long as you apply for him, he will charge, if you don't understand, you don't know which actions are most suitable for you. Therefore, it is recommended that you find a consulting company to help you do it, sharpen the knife and not chop the wood! You'll save a lot of money every year in the future!
Of course there is.
However, it is not recommended to study after graduating from junior high school. >>>More
Generally, a model of electronic products will be tested and certified by about 3W, but there is generally more than one model, so it is generally about 8W, we are a laboratory in Nanjing, if you have certification questions, you can consult me.