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On the advantages and disadvantages of UV optical adhesives

Release time:

2026-01-23 09:04

On the advantages and disadvantages of UV optical adhesives

UV optical adhesives are a rapidly developing class of light-curable adhesives that have gained significant traction in recent years. Thanks to their unique curing mechanism and excellent overall performance, they play an important role in the manufacturing of various optical and electronic products. Below, we will systematically review their core performance characteristics and, in conjunction with practical application requirements, analyze their advantages and limitations.

I. Key Advantages

1. Fast curing speed: Under UV light irradiation, UV optical adhesives can achieve rapid curing within seconds to tens of seconds, significantly boosting production throughput and making them ideal for automated continuous production, thereby helping to reduce production cycle time and labor costs.

2. Excellent optical performance: After curing, the adhesive layer exhibits high transparency and excellent light transmission, with minimal impact on the visual performance of optical devices. Therefore, it is widely used in applications such as display screens, touch panels, lens assemblies, and other fields with stringent requirements for light transmittance.

3. High bonding strength: It can firmly bond to substrates such as glass, various plastics, and metals, exhibiting excellent mechanical strength and durability, thereby enhancing the overall structural stability and reliability of the component.

4. Environmentally friendly: The curing process typically does not require heating, consumes less energy, and does not generate volatile organic compounds, aligning with the trend toward green production and facilitating clean manufacturing.

5. Highly adjustable formulation: By adjusting the types and proportions of prepolymers, monomers, and additives, its viscosity, curing rate, hardness, toughness, and other properties can be controlled within a certain range, making it suitable for various processing methods and product requirements.

II. Existing Limitations

1. Higher material costs: Due to the need for high-purity raw materials and specialized photoinitiator systems, the overall raw material cost of UV optical adhesives is higher than that of some conventional adhesives, placing certain pressure on the product’s total cost.

2. Limited Curing Thickness: Ultraviolet light has limited penetration capability within adhesive layers. For thicker adhesive layers or bonding to opaque materials, insufficient curing at the substrate level may occur. This issue can be addressed by optimizing the irradiation method or adopting a multi-stage curing process.

3. High requirements for light sensitivity management: The uncured adhesive is sensitive to ultraviolet light, so it must be strictly protected from light during both production and storage; otherwise, premature reactions or performance degradation may easily occur, increasing the difficulty of process control.

4. Reliance on specialized curing equipment: This requires the use of UV light sources and corresponding irradiation devices, involving significant initial investment. Moreover, equipment maintenance and adjustment of process parameters demand a certain level of technical expertise, which can pose certain constraints on small-scale or flexible production.

5. Strict process control requirements: Factors such as the uniformity of adhesive application, bonding accuracy, and UV exposure intensity and duration all directly affect the final bonding quality. Therefore, it is essential to possess the relevant process knowledge and operational experience to avoid defects like bubbles, insufficient adhesive coverage, and whitening.

6. Storage conditions are relatively stringent: Typically, products require low-temperature and light-shielded storage, and both transportation and warehousing management are highly complex. Once opened, the product must be used as soon as possible to prevent performance degradation.

III. Summary

UV optical adhesives have become an important material in optical and electronic assembly due to their rapid curing, excellent optical performance, and environmentally friendly characteristics. However, limitations in terms of cost, curing depth, process control, and storage also need to be thoroughly evaluated during material selection and application. In practical use, it is essential to carefully select and optimize the process by taking into account the specific product design, production efficiency requirements, and cost budget, so as to achieve a comprehensive balance among performance, efficiency, and cost-effectiveness.

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B-2111D (Aliphatic Polyurethane Acrylate)	Good adhesion to various substrates, high elongation, and resistance to high- and low-temperature shocks; aliphatic polyurethane acrylate.	UV liquid optical adhesive, UV adhesive
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B-215 (Aliphatic Polyurethane Acrylate)	Good adhesion to glass/metal, excellent flexibility, water resistance, acid resistance; aliphatic polyurethane acrylate.	Glass/Metal UV Adhesive
B-2621 (Aliphatic Polyurethane Acrylate)	High molecular weight, excellent adhesion to plastics, good flexibility, resistant to strong acids and strong bases, and low curing shrinkage—aliphatic polyurethane acrylate.	Odor-Neutralizing UV Adhesive

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