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UV resin for plastic electronics housings must balance adhesion, surface hardness, scratch resistance, flexibility, and appearance retention. In 3C coating applications, common substrates include ABS, polycarbonate (PC), PET, and PVD-coated plastics. Selecting the right polyurethane acrylate resin depends on the substrate, coating process, curing conditions, and required surface performance.
Guangdong Lencolo New Material Co., Ltd., under the Lencolo brand, supplies UV-curable resins for 3C coatings, plastic coatings, and vacuum metallization applications. The following questions summarize important considerations when evaluating UV resin grades for electronics housings.
1. What properties should a UV resin have for plastic electronics housings?
A UV resin for 3C plastic coatings should provide suitable substrate adhesion, scratch and abrasion resistance, and a balance between hardness and flexibility. Other requirements may include water resistance, hand sweat resistance, yellowing resistance, anti-fingerprint performance, and good surface appearance.
The complete formulation also matters. Monomers, photoinitiators, additives, film thickness, and curing conditions can all influence the final coating performance.
2. Which UV resin grades are suitable for ABS, PC, and PET coatings?
Different substrates and coating requirements call for different candidate resins:
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L-6205: A polyurethane acrylate for 3C and automotive plastic/PVD coatings, offering elasticity, surface dryness, and yellowing resistance.
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L-6280: A polycarbonate-modified polyurethane acrylate designed for toughness, high-temperature resistance, intercoat adhesion, and recoatability.
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L-6410: Suitable for plastic, PET film, and mobile device coatings, with water resistance, hand sweat resistance, and good color compatibility.
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L-6903: A high-leveling polyurethane acrylate with PET adhesion, soft-touch properties, anti-graffiti, and anti-fingerprint performance.
These grades are potential starting points. Actual compatibility should be confirmed on the customer’s specific substrate.
3. Which UV resin offers a balance of scratch resistance and flexibility?
L-6207 is positioned for 3C, glass, plastic, and PVD coatings. Its key features include balanced wear resistance and flexibility, fast curing, and RCA abrasion resistance exceeding 200 cycles under the specified test conditions.
For applications requiring water and heat resistance together with balanced hardness and flexibility, L-6390 is another candidate for formulation evaluation.
4. Which UV resins are suitable for PVD and metallized plastic housings?
For monocoat, PVD, and plastic-metal applications, L-6411 and L-6412 are relevant candidates.
L-6412 is particularly positioned for silver arrangement, RCA resistance, compatibility, and wettability. These characteristics are useful considerations when developing coatings for metallized plastic components.
L-6460 is another option where water resistance, vibration wear resistance, leveling, and film fullness are important.
5. Which UV resin grades provide anti-fingerprint and anti-graffiti properties?
Several Lencolo grades address surface protection requirements:
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L-6903: Combines soft-touch skin feel, PET adhesion, anti-graffiti, and anti-fingerprint properties.
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L-6905C-8: Offers leveling, transparency, anti-graffiti performance, and steel wool abrasion resistance.
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L-6905C-9: Focuses on leveling, fullness, transparency, and anti-graffiti performance.
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L-6905C-10: Adds high hardness to its leveling, fullness, transparency, and anti-graffiti profile.
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L-6907A: Designed for anti-fingerprint and stripping varnish applications, with high leveling and a water droplet contact angle above 105°.
The contact angle and abrasion results should be assessed under the relevant test methods and conditions.
6. How should formulators select the right UV resin for 3C coatings?
Before choosing a resin, formulators should identify the substrate, application method, curing equipment, film thickness, and target properties. Spray, roller, and curtain coating may require different processing characteristics. Mercury UV and UV LED systems should also be evaluated according to their actual curing conditions.
When several grades appear suitable, comparative formulation trials can help determine the best balance of adhesion, hardness, flexibility, and surface performance.
Conclusion
UV resin selection for plastic electronics housings requires application-specific evaluation rather than relying on hardness or adhesion alone. Lencolo’s candidate grades, including L-6205, L-6207, L-6280, L-6390, L-6410, L-6411, L-6412, L-6460, L-6903, the L-6905C series, and L-6907A, address different requirements in 3C coatings, plastic finishing, and PVD applications.
Final selection should always be confirmed through formulation trials and testing under actual production conditions.
https://www.lencolo37.com/
Guangdong Lencolo New Material Co., Ltd. -
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