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How to Choose the Right UV Transfer Adhesive (Part 1)

Release time:

2026-09-18 16:45

How to Choose the Right UV Transfer Adhesive (Part 1)

The selection of UV transfer adhesives directly affects both the feasibility of the transfer process and the quality of the final product. When faced with various product types, making an informed choice that aligns with specific application requirements is a critical step in coating process design. An inappropriate selection can result in inadequate adhesion, unclear pattern replication, or premature product failure. This article outlines a systematic approach to selecting UV transfer adhesives, focusing on two key factors: substrate type and surface‑performance requirements.

I. Selection Based on Substrate Type

The substrate is the primary factor in selecting a UV transfer adhesive. Different materials exhibit significantly varying adhesion to the adhesive.

For common plastic substrates such as PC and PET, general-purpose UV transfer adhesives typically meet the requirements. These products exhibit excellent adhesion to both PC and PET, which can be confirmed through adhesion testing. PC is widely used in components like smartphone back covers and lenses, while PET is commonly employed for sheet‑ and film‑based substrates.

For difficult-to-bond substrates such as TPU, a specialized TPU‑compatible UV transfer adhesive is required. Due to the low surface energy of TPU, conventional adhesives struggle to achieve satisfactory adhesion. TPU‑specific formulations address this challenge by optimizing adhesion promoters, delivering excellent bonding performance and minimizing shrinkage.

For glass substrates, a glass‑specific formulation or a high‑refractive‑index grade should be selected. Due to the smooth surface and low surface energy of glass, a dedicated adhesion‑promoting system is required to ensure strong bonding of the adhesive layer. High‑refractive‑index grades are specifically designed for glass substrates and PET transfer applications; they exhibit zero shrinkage upon curing and deliver excellent adhesion.

II. Selection Based on Surface Performance Requirements

Different application scenarios place varying emphasis on the surface properties of the cured coating, necessitating the selection of an appropriate type of UV‑curable transfer adhesive based on specific requirements.

After curing, high-hardness products achieve a notably high surface hardness, effectively resisting scratches and abrasion during everyday use, making them ideal for surfaces that experience frequent contact, such as smartphone back covers and buttons. These formulations enhance crosslink density by increasing the proportion of polyfunctional acrylate monomers, thereby attaining superior surface hardness.

High‑scratch‑resistant products excel in wear resistance, enduring steel‑wool abrasion under moderate loads with no noticeable marks. Some high‑performance formulations can withstand a particularly high number of steel‑wool test cycles, making them ideal for applications that demand long‑lasting aesthetics.

High‑elasticity products offer a silicone‑rubber‑like tactile feel and can withstand bending tests without cracking, deforming, or delaminating, making them ideal for applications requiring flexing or curved surfaces, such as textured decorative finishes on curved glass back covers.

Matte‑finish products feature low gloss and are suitable for decorative applications that require a matte surface.

III. Selection of Special Functional Requirements

For specific application scenarios, the adhesive’s specialized functional properties must also be taken into account.

Low-shrinkage products are ideal for high-precision applications such as optical brightening films and microlens arrays. By formulating a blend of low-shrinkage reactive monomers, they effectively reduce the curing shrinkage rate, ensuring the replication accuracy of intricate microstructures.

Yellowing‑resistant products utilize an aliphatic polyurethane acrylate system, which exhibits superior yellowing resistance compared to aromatic systems, making it ideal for applications with stringent requirements for optical performance and long‑term aesthetic stability.

Moisture‑and‑heat‑resistant products, by incorporating organosilicon‑modified resins, enhance the coating’s resistance to moisture and heat as well as its weatherability, thereby meeting the stringent long‑term reliability requirements of high‑end applications such as in‑vehicle displays and optical components for new energy vehicles.

IV. Conclusion

When selecting a UV transfer adhesive, consider the substrate and surface‑performance requirements from three perspectives: substrate type, surface‑performance specifications, and any special functional needs. For substrates such as PC and PET, general‑purpose formulations are suitable; for difficult‑to‑adhere materials like TPU, dedicated formulations should be chosen; and for glass substrates, glass‑specific or high‑refractive‑index grades are recommended. High‑hardness adhesives meet scratch‑resistance demands, highly elastic formulations accommodate curved‑surface bonding, and low‑shrinkage types ensure precise replication. In practice, it is advisable to conduct small‑batch testing to validate the selection, ensuring that the adhesive’s adhesion to the target substrate, texture‑replication accuracy, and curing performance all meet the required standards.

Disclaimer: The above content has been compiled from publicly available sources and is provided for reference only. If any infringement occurs, please contact us, and we will address it promptly.

Bossin Related Product Recommendations – Membrane Materials
Transfer adhesive
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-151	Modified epoxy acrylate	Low halogen, yellowing-resistant, excellent plating performance, and strong adhesion.
B-206	Aliphatic polyurethane acrylate	Weather resistance, flexibility, and yellowing resistance
B-216	Aliphatic polyurethane acrylate	Fast curing, high fullness, and excellent toughness.
B-221	Aliphatic polyurethane acrylate	Fast curing, resistant to boiling water
B-509B	Polyester acrylate	Good adhesion, good flexibility, and excellent pigment wetting.
B-546	Polyester acrylate	Good adhesion, fast curing, and excellent flexibility.
B-619W	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, wear resistance, and chemical resistance.
B-912	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, and outstanding chemical and wear resistance.
B-919B	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, and outstanding chemical and wear resistance.

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How to Choose the Right UV Transfer Adhesive (Part 2)

Applications of UV Transfer Adhesive