Standard for Dielectric and Flame Retardant Constant of Silicone Potting Adhesive

The flame-retardant grade of addition molding can reach UL 94V-0, and the flame-retardant grade of condensation type is UL 94V-1, which fully meets the requirements of the EU ROHS directive. Attachment: UL flame retardant grade standard. The flame-retardant grade is generally gradually reduced from V-0, V-1, V-2 to HB.

The flammability UL94 rating is the most widely used plastic material flammability performance standard. It is used to evaluate the ability of a material to extinguish after being ignited. According to the burning speed, burning time, anti-drip ability and whether the drops are burning, there are many ways to judge. Many values can be obtained for each tested material according to color or thickness. When the material of a certain product is selected, its UL rating should meet the thickness requirements of the wall part of the plastic part.

V-0: After the sample is subjected to two 10-second burning tests, the flame is extinguished within 30 seconds, and no burning material can fall.

V-1: After the sample is subjected to two 10-second burning tests, the flame is extinguished within 60 seconds, and no burning material can fall.

V-2: After two 10-second burning tests are performed on the sample, the flame is extinguished within 60 seconds, and burning materials may fall.

HB: The lowest flame retardant grade in the UL94 standard. It is required that for samples with a thickness of 3 to 13 mm, the burning rate is less than 40 mm per minute; for samples with a thickness of less than 3 mm, the burning rate is less than 70 mm per minute; or extinguished before the 100 mm mark.

It can be used stably for a long time in the range of -50℃～250℃, suitable for potting protection of module power supply and circuit board with high temperature resistance requirements. Such as: V-0 potting glue can be used in HID lamp power potting, LED module potting, LED waterproof power potting, electronic module power potting, lightning protection module electronic potting, negative ion generator potting, and town Current device electronic potting, automotive ignition system module power potting, etc.