Because UV light solid adhesive must be cured under the premise of irradiating ultraviolet light to the adhesive layer, its advantages and disadvantages are also obvious, and the following will be introduced in detail.
1. Advantages of UV light solid adhesive:
1. Environmental safety
No VOC volatiles, no pollution to the ambient air, adhesive components are less restricted or prohibited in environmental protection regulations, solvent-free, and low flammability.
, economy
The curing speed is fast, and the curing can be completed in a few seconds to tens of seconds, which is conducive to automated production lines, improves labor productivity, and can be detected and transported after curing, saving space and curing at room temperature, saving energy, for example, the energy required to produce 1g light-curing pressure-sensitive adhesive only needs 1% of the corresponding water-based adhesive and 4% of the solvent-based adhesive. It can be used for materials that are not suitable for high-temperature curing, and the energy consumed by UV curing can save energy compared to heat-curing resins 90% The curing equipment is simple, only lamps or conveyor belts are needed, and the space-saving one-component system does not need to be mixed, which is easy to use.
3. Compatibility
For temperature, solvent and moisture-sensitive materials, controlled curing can be used, waiting time can be adjusted, curing degree can be adjusted, sizing can be repeated and cured multiple times, UV lamps can be easily installed in existing production lines without major changes.
II. II. II, the shortcomings of UV light solid adhesive
The cost of UV light solid adhesive raw materials is high, it does not contain low-cost solvents and fillers, and the adhesive is high. Ultraviolet light has weak penetration of some plastics or translucent materials, the curing depth is limited, the geometry of the curable product is limited, and the opaque parts and dead corners that cannot be irradiated by ultraviolet light are not easy to cure. General UV adhesive can only bond light-transmitting materials, and bonding opaque materials needs to be combined with other technologies, such as light-delayed (cationic) curing, photothermal dual curing, light-moisture dual curing, etc.