What is the mechanism of dual-curing UV glue commonly used in the camera AA process?
Dual-cure UV glue is a type of glue with a dual-cure mechanism that combines ultraviolet (UV) curing and thermal curing. It quickly forms a primal layer upon exposure to UV light, but because the curing process may be limited by light, it requires subsequent heat curing to achieve a full cure.
Here's how CRCBant dual-curing UV glue works:
UV curing: When the dual-curing UV glue is exposed to ultraviolet light, the UV sensitizer in the glue will absorb the UV energy, triggering the activation of the photoinitiator. The photoinitiator stimulates the monomers in the glue to polymerize to form a primitive-cured layer.
Thermal curing: When the cured layer is exposed to a heat source (usually a baking oven or heat gun, etc.), the thermal curing agent in the glue is activated, triggering further reactions in the polymerization reaction, resulting in a complete cure.
Due to the combination of UV curing and thermal curing characteristics, dual-curing UV glue is suitable for applications with thicker curing layers: due to the formation of a primary curing layer by ultraviolet irradiation, dual-curing UV glue can cure thicker adhesive layers in a shorter time, which is suitable for applications that need to be filled or coated with more glue.
Deep curing: Due to the deep areas that cannot be reached by light, the dual-cure UV glue can be fully cured by subsequent heat curing, ensuring the strength and stability of the entire bonding site.
However, it should be noted that the thermal curing temperature and time of dual-curing UV glue need to be adjusted and controlled according to the requirements of the specific product to ensure that the curing effect and performance meet the requirements.
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