In today's global environmental protection attaches great importance to the background, all industries are actively seeking green, sustainable production methods. As a key step in the manufacturing of many products, the bonding process in industrial production has also attracted a great deal of attention to its environmental performance. UV hot melt adhesive applicators, with their unique technological advantages, have demonstrated excellent performance in environmental protection, and at the same time have a wide range of applications in a variety of materials and industries. 

First, the principle of work to lay the foundation for the application

UV Hot Melt Adhesive Coating Machine combines two technologies of hot melt adhesive coating and ultraviolet curing. Firstly, the solid UV hot melt adhesive is heated and melted into liquid state, and then uniformly coated on the surface of the substrate through the coating head under pressure. Subsequently, the coated substrate enters the UV curing area, where the photoinitiator in the UV hot melt adhesive decomposes under UV irradiation and generates free radicals, triggering the polymerisation of the unsaturated double bonds in the adhesive, thus rapidly transforming the hot melt adhesive from a liquid to a solid state, and realising a firm bond to the substrate. This unique working principle makes it suitable for a wide range of materials with different characteristics. 

Wide range of applicable materials

. Metal materials: such as stainless steel, aluminium alloy, copper and so on. Metal surface is usually smooth and has a certain degree of hardness, UV hot melt adhesive can form a good chemical bond with the metal surface and mechanical bite. For example, in the manufacture of electronic equipment shell, the use of UV hot melt adhesive applicator will be aluminium alloy shell components for bonding, its high strength after curing bonding to ensure that the shell will not be easy to use in daily use cracking or loosening, and at the same time due to the UV hot melt adhesive fast curing characteristics, greatly improving production efficiency. 

. Plastic materials: including common polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) and engineering plastics such as polycarbonate (PC), nylon (PA) and so on. The surface energy and chemical properties of different plastics vary, but UV hot melt adhesives can be adapted to a wide range of plastics through the optimisation of formulations. Taking the bonding of the plastic shell of a mobile phone and the internal plastic support as an example, the UV hot melt adhesive applicator can accurately apply the hot melt adhesive to the required area, and then achieve a strong bond after fast curing, which meets the requirements of the thin and light design of mobile phones in terms of bonding strength and precision. 

. Glass material: Glass has high surface energy and smooth surface, UV hot melt adhesive can form good wetting and bonding effect on the glass surface. It is widely used in optical lens manufacturing, glass crafts production and other fields. For example, in the assembly of optical lens, UV hot melt adhesive coating machine will accurately coat the hot melt adhesive between the lens and the lens barrel, after UV curing, to ensure that the position of the lens is fixed accurately, and the bonding place has good weather resistance and stability, without affecting the optical performance. 

. Paper materials: Cardboard, corrugated paper and other paper materials used in packaging industry are also suitable for UV hot melt adhesive coating machine. Paper fibres are porous, and UV hot melt adhesive can penetrate into the paper fibres to form a mechanical anchoring effect, thus achieving high strength bonding. In the sealing and gluing process of cartons and boxes, UV hot melt adhesive coater can quickly and firmly bond paper, which not only improves the production efficiency of packaging, but also ensures the strength of packaging during transport and storage. 

Third, diversified industry applications

. Electronic industry: from tiny electronic components fixed to large-scale electronic equipment assembly, UV hot melt adhesive coater plays an important role. Such as chip packaging, circuit board assembly, mobile phones and tablet PCs and other electronic products shell assembly. In these applications, UV hot melt adhesive applicator can achieve high precision coating, to ensure the reliability of bonding, while the fast curing characteristics of the electronics industry to adapt to the needs of high-speed production, and will not cause thermal damage to electronic components. 

. Automotive manufacturing industry: the bonding of automotive interior parts, such as the bonding of seat fabrics and frames, the assembly of dashboard components, the manufacture of automotive lamps and so on can not be separated from the UV hot melt adhesive coater. In the manufacture of seats, the seat fabric is firmly bonded to the frame by UV hot melt adhesive coater, which ensures that the seat fabric will not fall off during long-term use, and at the same time, meets the requirements of beauty and comfort of automobile interiors. In the manufacture of automotive lamps, UV hot melt adhesives are used to bond the lampshade and lamp body, which can provide good sealing and weather resistance to ensure that the lamps work properly in various harsh environments. 

. Packaging industry: one of the most widely used industries for UV hot melt adhesive applicators. Whether it is the production of cartons, cardboard boxes, or labelling, flexible packaging lamination and other processes, you can see its figure. In high-speed packaging production lines, UV hot melt adhesive coater can quickly and accurately apply hot melt adhesive on packaging materials to achieve efficient bonding. For example, in food packaging, UV hot melt adhesive coater can quickly bond the carton into shape, and at the same time meet the hygiene and safety requirements of food packaging due to its environmentally friendly and VOCs-free characteristics. 

. Furniture manufacturing industry: used for sealing, splicing, mortise and tenon structure of furniture panels, etc. The hot melt adhesive applied by UV hot melt adhesive applicator cures in a short period of time, which enables furniture parts to be shaped quickly and improves production efficiency. And the high bonding strength after curing can ensure the quality and service life of the furniture. In the mortise and tenon structure bonding of solid wood furniture, UV hot melt adhesive can fill the tiny gaps between the mortise and tenon, forming a strong connection and enhancing the overall stability of the furniture. 

UV hot melt adhesive applicator with its environmental characteristics and good applicability to a variety of materials, in many industries to achieve efficient, high-quality bonding of important equipment, to promote the development of various industries in the direction of green, sustainable development.