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Basic Classification of UV Adhesives

Release time:

2025-05-08 01:10

Basic Classification of UV Adhesives
Basic Classification of UV Adhesives

UV adhesives, or ultraviolet-curable adhesives, play an important role in modern industry thanks to their efficient and environmentally friendly properties. By rapidly curing upon exposure to ultraviolet light, they not only enhance production efficiency but also meet the dual demands of high performance and environmental sustainability.

Based on differences in chemical composition, morphology, and application fields, UV adhesives can be classified into the following categories:

I. Classification by Chemical Composition

According to their chemical compositions, UV adhesives are mainly categorized into types such as acrylate-based, silicone-based, and polyimide-based.

1. Acrylate-based UV adhesives

Acrylate-based UV adhesives are the most common type, with acrylate monomers as their primary components. Under ultraviolet light irradiation, these adhesives rapidly undergo a polymerization reaction to form a solid colloidal structure. They remain in a liquid state, making them easy to apply and cure.

Epoxy acrylate: Produced via copolymerization of epoxy resins with acrylate monomers, it boasts excellent adhesion properties and chemical resistance, and is widely used in fields such as electronics and optics.

Polyurethane acrylate: A copolymer made by combining a polyurethane prepolymer with acrylate monomers, it exhibits excellent flexibility and impact resistance, making it suitable for applications such as bonding rubber to metal.

Polyester acrylate: Produced via copolymerization of polyester resin with acrylate monomers, it exhibits low viscosity and excellent wettability, making it suitable for materials with low surface energy, such as plastic films.

2. Silicone-based UV adhesives

Made with silicone compounds as the main ingredient and combined with UV curing technology, it is in liquid form for easy application and curing. It boasts excellent high-temperature resistance, weather resistance, and electrical insulation properties, making it suitable for bonding in harsh environments and applications requiring electrical insulation.

3. Polyimide-based UV adhesives

Made primarily from polyimide and cured via UV irradiation, this adhesive comes in liquid or paste form. This type of adhesive exhibits outstanding resistance to high temperatures, radiation, and chemical corrosion, making it suitable for high-end applications such as aerospace and the nuclear industry.

II. Classification by Form

Based on morphological differences, UV adhesives can be categorized into substrate-based UV adhesives and substrate-free liquid UV adhesives.

1. UV adhesive with a substrate

These adhesives are produced by coating the adhesive onto specific substrates to form strip- or sheet-like products for user application. Their key feature is adjustable adhesion, offering flexible application and the ability to meet bonding requirements for various shapes and surfaces. They find wide applications in the fields of microelectronics, precision manufacturing and assembly, and optoelectronic devices.

2. Base-free liquid UV adhesive

Base-free liquid UV adhesives remain in liquid form at room temperature and are typically supplied in bottles or cans. Their key feature is that their liquid state allows them to easily penetrate gaps and achieve tight bonding. They can be rapidly cured by exposure to UV light, forming strong adhesive bonds. These adhesives are widely used for bonding various materials as well as for joining and sealing components in industrial manufacturing.

III. Classification by Application Area

Depending on the specific application area, UV adhesives can be further subdivided into various types.

1. UV Pressure-Sensitive Adhesive (PSA)

UV-sensitive adhesive is a type of adhesive manufactured through UV curing. It comes in various product forms, including decorative films and protective films. This adhesive features rapid curing speed, high transparency, strong adhesion, and excellent resistance to yellowing, water, and weathering. It is suitable for a wide range of applications, from advertising boards and electronic products to high-end packaging boxes.

2. UV architectural adhesive

UV-curable adhesives specifically designed for the construction industry come in various forms, such as gel and film. After curing, they exhibit high strength and excellent weather resistance, meeting the stringent requirements of modern construction projects. They are primarily used in architectural decoration applications—including shop window fittings and stained glass—as well as in the safety glass market.

3. UV electronic adhesive

UV-curable adhesives tailored to the needs of thin-film electronic products and organic optoelectronic devices are available in liquid form, making them easy to apply and cure. With fast curing speeds and high bonding strength, these adhesives are widely used in fields such as flexible circuit board alignment, pin sealing, liquid crystal panel fabrication, and mobile phone keycaps.

4. UV optical adhesive

UV-curable adhesives used for optical applications and possessing specific optical properties are categorized into liquid (LOCA) and solid (OCA) forms. These adhesives feature high bonding strength, excellent light transmittance without compromising the performance of optical components, and effectively enhance impact resistance. They are primarily used for bonding and fixing optical components such as touch screens.

5. UV Medical Adhesive

UV-curable adhesives specially designed for the production of medical devices—available in liquid or paste form—are easy to apply and cure. These adhesives are environmentally friendly, safe, non-toxic, and odorless, meeting the stringent requirements of the medical industry. They are used for bonding disposable catheters and syringes, as well as for certain high-transparency medical devices such as endoscopes and surgical instruments.

6. UV-resistant, waterproof, and dustproof adhesive

UV-curable adhesives synthesized using low-viscosity resins are primarily used for circuit board protection. They feature water resistance, shock resistance, and superior salt-spray resistance and dielectric strength compared to other three-proof coatings, providing comprehensive protection and making them widely used as circuit board protective coatings.

IV. Summary

In summary, UV adhesives, with their high efficiency, environmental friendliness, and durability, play an indispensable role in a wide range of industrial sectors. As technology advances and industry continues to develop, the application scope of UV adhesives will only continue to expand, providing increasingly reliable bonding solutions for production and growth across various industries.

Bossin Related Product Recommendations

UV adhesive

Product Type

Product Features

Application areas

B-151

Low halogen, excellent flexibility, yellowing resistance, good plating performance, and strong adhesion.

Vacuum-plated UV coatings, metal/plastic UV varnishes, UV adhesives, UV nail gel coatings

B-151DT

Yellowing resistance, good flexibility, excellent plating performance, and strong adhesion.

Vacuum-plated UV coatings, metal/plastic UV varnishes, UV adhesives, UV nail gel coatings

B-186

Resistant to boiling water, excellent adhesion to glass, high-temperature resistance, and chemical resistance.

Glass UV glue

B-2058P-2

It features excellent adhesion, low curing shrinkage, superior flexibility, high tensile strength in the cured film, and resistance to strong acids and strong bases.

UV adhesives for bonding various plastics, specialty substrates, and glass

B-211A

Good adhesion to glass/metal, excellent flexibility, and water resistance.

Glass/Metal UV Adhesive

B-2111D

Good adhesion to various substrates, high elongation, and resistance to both high- and low-temperature shocks.

UV liquid optical adhesive, UV adhesive

B-2116

Good adhesion to plastics, excellent flexibility, acid and alkali resistance, and high elongation rate.

UV glue

B-215

Good adhesion to glass/metal, excellent flexibility, water resistance, and acid resistance.

Glass/Metal UV Adhesive

B-2621

Low shrinkage upon curing, excellent flexibility, highly stretchable cured film, and resistance to strong acids and strong bases.

UV glue

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