Hot melt adhesive is a kind of plastic adhesive. In a certain temperature range, the physical state of the adhesive is changed with the temperature change, and the chemical properties are constant, and it is nontoxic and tasteless. It is an environmentally friendly chemical product. Fast bonding, glue and bonding interval of only a few seconds, saw head and cutting edge can be completed within 24 seconds, without drying time, can be used for continuous and automated wood bonding assembly line, greatly improving production efficiency, saving the cost of the factory. A wide range of uses, suitable for bonding all kinds of materials.