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How to Address Defects in UV Transfer Adhesive (Part 3)

Release time:

2026-09-22 23:21

How to Address Defects in UV Transfer Adhesive (Part 3)

Whitening or haze in the coating is a critical defect that degrades optical performance in UV transfer‑printing applications. To address this issue, corrective measures should be implemented across several fronts, including environmental humidity control, optimization of curing conditions, mold cleaning, and enhancement of formulation compatibility.

I. Controlling Water Sources

Moisture ingress is a common cause of whitening in coatings; the key to addressing this issue lies in controlling ambient humidity during application and ensuring that the substrate is thoroughly dry.

Maintain the construction environment’s relative humidity within an appropriate range. For systems sensitive to moisture, dry the substrate prior to coating and perform lamination and curing under low-humidity conditions. After cleaning, ensure the substrate is thoroughly dried to prevent residual surface moisture from forming microbubbles during the curing process.

II. Ensure Sufficient Curing

Incomplete curing can result in residual monomers that scatter light; the remedy is to ensure sufficient curing energy to achieve full crosslinking of the adhesive layer.

Regularly measure the output energy of the light source, and replace aging lamps promptly. The irradiation time must be matched to both the light source’s energy and the adhesive formulation; do not shorten it arbitrarily. For dark‑colored systems or thick coatings, select a deep‑penetration photoinitiator and appropriately extend the curing time.

3. Clean the mold to remove residual release agent.

Residual release agent can leave hazy spots on the adhesive layer’s surface; the solution is to clean the mold regularly and carefully control the amount of release agent used.

Regularly clean the mold with a dedicated cleaner and a soft cloth to remove any residual release agent. Take care to avoid scratching the mold surface during cleaning. Apply the release agent in an appropriate amount—too little may result in difficult demolding, while too much can leave residues that affect the appearance.

IV. Optimizing Formulation Compatibility

Poor raw-material compatibility can lead to microphase separation, resulting in whitening; the remedy is to consider the compatibility of each component during formulation design.

Select mutually compatible raw-material systems, paying close attention to the compatibility between prepolymers and reactive diluents, as well as between additives and the resin system. When necessary, add a compatibility enhancer or incorporate an appropriate amount of a co‑solvent into the formulation to improve system homogeneity. The adhesive should be used within its shelf life and stored away from light as specified to prevent whitening caused by premature polymerization.

V. Conclusion

Addressing the issue of whitening in coatings requires a four‑pronged approach: moisture control, curing conditions, mold cleanliness, and formulation compatibility. By managing ambient humidity, ensuring adequate curing, performing regular mold cleaning, and optimizing formulation compatibility, the occurrence of coating whitening can be effectively minimized, thereby safeguarding the aesthetic quality and optical performance of transfer‑printed products.

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.

Bosheng 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, excellent flexibility, and superior 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 superior chemical and wear resistance.
B-919B	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, and superior chemical and wear resistance.

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How to Address Defects in UV Transfer Adhesive (Part 4)

How to Address Defects in UV Transfer Adhesive (Part 2)