The solvent-free composite technology completely meets the requirements of high efficiency, environmental protection and energy conservation. Its process flow is simple, energy consumption is low, raw materials are saved, and the speed of production is high. There is no solvent residue in the production process, which will not cause harm to human body or the environment. Solvent free adhesive is coated without solvent, which is not limited by solvent emissions and meets the national requirements for environmental protection.