UV adhesive is to add photoinitiator (or photosensitizer) to the resin with special formula. After absorbing the high-intensity ultraviolet light in the ultraviolet (UV) curing equipment, it will produce active free radicals or ionic radicals, so as to initiate polymerization, cross-linking and grafting reactions, so that the resin (UV coating, ink, adhesive, etc.) can be converted from liquid to solid within a few seconds (ranging). This change process is called “UV curing”.
1、 Advantages of UV adhesive:
1. The UV adhesive does not contain VOCs volatiles and has no pollution to the air. The formulation components of UV adhesive are rarely prevented or restricted in all environmental regulations, and have no solvent and low flammability. Comply with safe storage and transportation regulations.
2. The curing speed of UV adhesive is very fast. Using UV curing equipment with different power can completely cure in a few seconds to minutes, which greatly improves the production efficiency of manufacturing enterprises. It is very suitable for automatic assembly line production. After the UV adhesive is cured, it can immediately carry out adhesion performance testing, product packaging and transfer shipment, saving the floor space of finished and semi-finished products. The equipment used in the UV curing process generally has low power, which saves valuable energy. Compared with the heat curing adhesive, the energy consumed by using UV curing adhesive can save 90% of the energy consumption. In addition, the UV curing equipment has simple structure, small floor area and saves workplace space.
3. The UV adhesive can be flexibly used under various environmental conditions and requirements. The curing time and waiting time can be adjusted according to needs. The curing degree of the UV adhesive can be adjusted at will and can be repeatedly applied and cured. It brings convenience to the production management. The UV curing lamp can be conveniently installed on the existing production line according to the actual situation. It does not need major adjustment and modification. It has the flexibility that ordinary adhesives can not compare.
2、 Disadvantages of UV adhesive:
1. The cost of raw materials for UV adhesives is generally high. Since there are no low-cost solvents and fillers in the ingredients, the manufacturing cost of UV adhesives is higher than that of ordinary adhesives, and the corresponding sales price is also higher.
2. the penetration of ultraviolet ray to some plastics or translucent materials is not strong, the curing depth is limited, and the geometry of curable objects is subject to certain constraints. The parts that cannot be irradiated by ultraviolet ray are not easy to be completed at one time, and the parts that are not transparent are not easy to be cured.
3. ordinary UV adhesives can only be used to bond some light transmitting materials. Bonding the light transmitting materials requires a combination of other curing methods, such as cationic curing, UV heating double curing, UV moisture double curing, UV anaerobic double curing, etc.
All series of products of Shenzhen Zicai brand are widely used in various industrial fields, such as various UV curable coatings, UV curable inks, UV curable adhesives, 3C electronic products, automotive interior and exterior trim parts, and surface hardening and wear-resistant treatment of various functional films.
Post time: Jun-21-2022