Why is there such a big difference in the hard glue used for LED lamp bead packaging?

First of all, you may not know about packaging glue. Packaging adhesive can be divided into phenyl packaging adhesive (high folding) and methyl packaging adhesive (low folding). Due to the defects of the material itself and the lack of research in China, methyl packaging adhesive often has problems. At present, the more mature phenyl sealant is used in the market. Their prices are quite different. Phenyl is much harder than methyl, so your last two are methyl, which is very cheap.

The cold and hot shock of methyl is not enough. The dead light is because the gold wire and silver wire may expand with heat and contract with cold.

In fact, this involves the third question, the quality of the lamp post bracket. I hope you can grasp the quality of the lamp post before considering the problem of packaging adhesive. Zhao Shun technology starts with phenyl basic materials. The quality of their phenyl packaging adhesive is ok, but the price is not high! Hope to adopt, thank you.