Many people who use hot melt adhesives or want to know more about hot melt adhesives will have a question, that is, whether hot melt adhesives are resistant to high temperature, and how many degrees of high temperature can they withstand. Some irresponsible manufacturers or companies on the Internet will say that hot melt adhesives are resistant to high temperatures, which is not a rigorous statement. Let’s briefly talk about it below.
From the characteristics of hot melt adhesive itself
The high temperature resistance of hot melt adhesive is relatively poor, because it is a thermoplastic material, which needs to be heated and melted, and then hardened by cooling to produce bonding. The initial melting point of conventional hot melt adhesives is generally between 40°C and 120°C, so in theory, the highest temperature resistance is about 120°C. But in fact, when it does not reach 120 °C, the hot melt adhesive may soften to a certain extent, so the actual temperature resistance is a little lower than this temperature, which is about 100 °C, which may already be the current conventional hot melt adhesive. product limit.
However, there is currently a reactive hot melt adhesive product
For example, PUR hot melt adhesive is not a hot melt adhesive in essence, but a reactive adhesive that relies on moisture curing. So it is essentially a thermosetting adhesive. Because it is a thermosetting adhesive, heating actually promotes its reaction and curing, so it is irreversible, so the temperature resistance is standard, and it can generally withstand more than 200 degrees.
So, you have to ask whether hot melt adhesive can withstand high temperature?
How many degrees of high temperature can it withstand, then the answer is that conventional hot melt adhesive products cannot withstand too high temperature, at most about 100 ℃. However, reactive hot melt adhesive products can withstand high temperatures because it is essentially a thermosetting adhesive product.
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