Hot melt adhesive is a widely used adhesive in industries, homes, and other fields, and its heat resistance varies depending on the product type and purpose. Conventional hot melt adhesives typically have an initial melting point between 40 ℃ and 120 ℃, but in reality, when the temperature approaches or slightly drops below 100 ℃, the hot melt adhesive may experience a certain degree of softening. Therefore, the heat resistance temperature of conventional hot melt adhesives is generally considered to be around 60 ℃ -100 ℃.
However, with the development of technology, a reactive hot melt adhesive such as PUR hot melt adhesive has emerged in the market. This adhesive is essentially a reactive adhesive that relies on moisture curing, and its heating process is irreversible. Therefore, the heat resistance of PUR hot melt adhesive is significantly better than that of conventional hot melt adhesive, and it can withstand temperatures up to 200 ℃ or above.