Low-gloss UV-curable coatings: Light mechanisms, formulations and processes — A review

Calvez, Ingrid; Davoudi, Sorour; Szczepanski, Caroline R.; Landry, Véronic

doi:10.1016/j.porgcoat.2022.107039

Cited by 14 publications

(8 citation statements)

References 66 publications

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“…39,40 A reduced gloss is often reported in polymer-filler composites, because filler alters the surface texture by increasing its roughness and affecting light reflection. 37,41,42 The modifier addition also affected transparency of the PE films. Interestingly, reduced haze and higher transparency of PE/CD-lim composites, compared to plain polyethylene, were noted.…”

Section: Resultsmentioning

confidence: 99%

Linear low‐density polyethylene modified with d‐limonene/β‐cyclodextrin inclusion complex: Antimicrobial composite for active food packaging

Dobrzyńska‐Mizera,

Knitter,

Piss

et al. 2023

Polymer Engineering & Sci

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Linear low‐density polyethylene (PE) containing an inclusion complex composed of β‐cyclodextrin and d‐limonene (CD‐lim) is proposed as an innovative food wrapping material with antimicrobial features. PE/CD‐lim composites are prepared by conventional, high‐volume processing, and the optical and mechanical properties of the developed formulations appear suitable for their use as food packaging materials. Compared to plain PE, the PE/CD‐lim films have improved haze and UV–vis outcomes, but also decreased gloss values. Addition of CD‐lim slightly increases water uptake, up to levels suitable for the foreseen application. It also allows to improve performance of PE as food packaging material, since the PE/CD‐lim composites provide barrier to ultraviolet light, an added value for packaging of fatty acids‐containing food items, whose shelf life is often limited by oxidation caused by UV light. Most importantly, PE/CD‐lim composites exhibit significant antimicrobial properties against a wide range of microorganisms, including fungi and bacteria. Hence, PE films containing CD‐lim display suitable properties to play a role as active food packaging films.Highlights Development of polyethylene‐based composites containing a natural filler Composite films with enhanced antimicrobial and antifungal efficiency Improved transparency to visible light and barrier to UV of the composites

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Section: Resultsmentioning

confidence: 99%

Linear low‐density polyethylene modified with d‐limonene/β‐cyclodextrin inclusion complex: Antimicrobial composite for active food packaging

Dobrzyńska‐Mizera,

Knitter,

Piss

et al. 2023

Polymer Engineering & Sci

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show abstract

“…The shells of electronic products such as keyboards and mice are generally multi‐coated structures. As the outermost UV coating, in addition to reducing material abrasion and enhancing functionality, it is also necessary to reduce gloss to render the product style and alleviate people's visual fatigue 36,37 . With the reduction of gloss, UV coatings in multi‐coat systems are prone to cosmetic quality problems such as bottom biting, blooming and unstable gloss 38 .…”

Section: Resultsmentioning

confidence: 99%

“…As the outermost UV coating, in addition to reducing material abrasion and enhancing functionality, it is also necessary to reduce gloss to render the product style and alleviate people's visual fatigue. 36,37 With the reduction of gloss, UV coatings in multi-coat systems are prone to cosmetic quality problems such as bottom biting, blooming and unstable gloss. 38 Figure 7a-c depicts the cosmetic quality of PUA, Silicone-modified PUA, and PUA/Siliconemodified-PUA multi-coat systems.…”

Section: Cosmetic Inspection Of the Coatingmentioning

confidence: 99%

Preparation of matte, abrasion‐resistant and anti‐fouling waterborneUV‐curable coating and its application in electronic product shells

Jiang,

Wu,

Yan

et al. 2023

J of Applied Polymer Sci

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This paper presents a viable coating design for the production of waterborne coatings using PUA, Silicone‐modified‐PUA, Al‐SiO2, and PTFE as key ingredients. The coatings are prepared through an air compression spraying technique followed by a photocuring procedure. The resulting PUA/Silicone‐modified‐PUA/Al‐SiO2/PTFE coating exhibits exceptional properties including high hardness, low surface tension, and a low coefficient of friction. Experimental findings reveal noteworthy characteristics of the coating. It possesses a gloss level of 4–6°, a hardness of 492.69 N/mm, an elasticity modulus of 11469.94 MPa, a surface roughness of 0.87 μm, a dynamic coefficient of friction of 0.125 μN, and a surface tension of 0.4967 mN/m. To assess its performance, the coating underwent rigorous tests such as the CS‐5 Wool Touchpad Shinning Friction test with a 200 g load over 250,000 cycles. It exhibited minimal changes in gloss (≤2°) and color difference (∆E ≤ 0.75). Additionally, the CS‐10 abrasive head Optical Surface Taber Abrasion Resistance test was conducted using a 500 g load for 10 cycles, resulting in a Class 1 rating, and after 100 cycles, it achieved a Class 3 rating. This demonstrates its remarkable resistance to tribological environments, enduring tapping, touching, and scraping by fingers over extended periods.

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“…The perception of the gloss can relate to a product (substate) finish, texture and how the sample is illuminated and viewed. Surface with high reflectance and perceived as a gloss, shiny or lustrous, while the less reflective surface is perceived as a semigloss or matt ( Calvez et al, 2022 ). Nevertheless, in many instances, a high gloss finish implies high quality, and it is important to ensure that the gloss level not only remains consistent across the substrate, which may negatively affect the performance of the metal substrate.…”

Section: Aging Test Of Natural Weatheringmentioning

confidence: 99%

Electrochemical corrosion protection of neat and zinc phosphate modified epoxy coating: A comparative physical aging study on Al alloy 6101

et al. 2023

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Optimizing the pigment volume concentration of zinc phosphate pigments can protect Al alloy 6101 from alkaline media. Additionally, zinc phosphate pigments form a shielding film on the substrate and facilitate stopping the penetration of aggressive corrosion ions. The efficiency of eco-friendly zinc phosphate pigments is almost 98% during the corrosion analysis. A comparative study of physical aging of neat epoxy and Zinc Phosphate (ZP) pigment-modified epoxy coatings on Al alloy 6101 was conducted in Xi’an, China, for one year in all four seasons, where in summer for 3 months, results degraded more due to high UV radiation and humidity; it is found that peeling force of ZP pigments modified epoxy coatings is 50% higher of than that of the neat epoxy coatings though both peel-off adhesion strength and scratch test visibility decreased in both coatings; The electrochemical resistance of ZP pigments modified epoxy coatings is about 30% higher of than that of neat epoxy coatings, the corrosion rate of ZP pigments modified epoxy coatings is about 70% lower of than that of neat epoxy coatings, moreover the gloss retention is 20% higher in the modified epoxy; Optical surface observation of the coatings showed that the ZP modified epoxy coating could effectively restrict the crack and shrinkage in coatings after aging experimentation in the natural environment.

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Low-gloss UV-curable coatings: Light mechanisms, formulations and processes — A review

Cited by 14 publications

References 66 publications

Linear low‐density polyethylene modified with d‐limonene/β‐cyclodextrin inclusion complex: Antimicrobial composite for active food packaging

Linear low‐density polyethylene modified with d‐limonene/β‐cyclodextrin inclusion complex: Antimicrobial composite for active food packaging

Preparation of matte, abrasion‐resistant and anti‐fouling waterborneUV‐curable coating and its application in electronic product shells

Electrochemical corrosion protection of neat and zinc phosphate modified epoxy coating: A comparative physical aging study on Al alloy 6101

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