Colour and gloss properties of pigment‐printed synthetic leather using an ultraviolet‐curable water‐borne polyurethane acrylate binder and two photoinitiators at different ratios

Baysal, Gülçin; Kalav, Berdan; Kayaoğlu, Burçak Karagüzel

doi:10.1111/cote.12386

Cited by 8 publications

(11 citation statements)

References 32 publications

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“…Other fillers used are pigments. Pigments and nanoparticles with high UV light are harmful to photopolymerization due to the inhibition of free radicals that lead to binder polymerization, thus decreasing the curing degree in pigmented films [102,163]. Particles such as carbon black (CB) tend to agglomerate in dispersions and present a higher UV-light absorbency than other pigments, which causes the photoinitiator efficiency to decrease and the unsaturation conversions C = C of UV-WPU to be impaired [102].…”

Section: Nanoparticles As a Reinforcement Componentmentioning

confidence: 99%

“…Waterborne UV-curable coatings have the performance and environmental requirements necessary for industrial applications as substrate protectors, such as wood, metal, automotive parts, synthetic leather, fabrics, and paper [43,91,110,138,153,163,165]. They can also be applied in the form of ink for flexographic printing packaging materials, magazines, and miscellaneous pieces of printing sectors [93].…”

Section: Applicationsmentioning

confidence: 99%

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UV-curable waterborne polyurethane coatings: A state-of-the-art and recent advances review

Agnol

Dias

Ornaghi

et al. 2021

Progress in Organic Coatings

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Waterborne polyurethane coatings prepared by UV-induced photoreactions (UV-WPU) are becoming very attractive due to the increasingly stringent environmental demands. They were developed to replace solventbased polyurethanes in the coatings of wood, paper, plastics, metal, and glass, mainly because of their good physicochemical, rheological, and optical properties. Several UV-WPU formulations have been tested over the years, making their research substantial. However, no valuable review of this literature, focusing on the significant influencing factors in UV-WPU's manufacture, is available to date. This work aims to answer specific questions about the state of these materials' art, such as: "which monomers have been used most in UV-WPU synthesis?", "what type of photo-initiator has promoted the most efficient curing of the material?", "what additives or particles have been tested for composite UV-WPUs?", "which applications have UV-WPUs been directed to?", "what adaptations and technologies have already been tested to overcome the challenges of the process?", among others. As a result of a systematized bibliographic search in four databases, considering the period from January 2000 to July 2020, a total of one hundred and thirty-eight distinct and relevant articles on UV-WPUs were found. From this study, we hope to present a scientific source on the current state-of-the-art of UV-WPU synthesis, providing new combinations of raw materials and intelligent solutions, thus making material and industrial engineers able to mitigate the inconveniences of the process.

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Section: Nanoparticles As a Reinforcement Componentmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

UV-curable waterborne polyurethane coatings: A state-of-the-art and recent advances review

Agnol

Dias

Ornaghi

et al. 2021

Progress in Organic Coatings

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“…The ratio of the photoinitiators was selected as 1:1 to obtain uniform curing and the desired film properties, i.e. colour and gloss [21]. The pigment concentration was used as 3% over the binder mass.…”

Section: Preparation Of Uv-curable Pigmented Printing Pastes and Prinmentioning

confidence: 99%

“…Previously, we reported on the effect of the water-borne polyurethane acrylate binder concentration and photoinitiator ratio on the UV printing performance of synthetic leather [20,21]. In the current study, we aimed to determine the effect of different colour pigments on the UV printing performance of synthetic leather samples.…”

Section: Introductionmentioning

confidence: 96%

Effect of pigment colour on the printing performance of synthetic leather using a ultraviolet‐curable water‐borne polyurethane acrylate binder

Baysal

Kalav

Kayaoğlu

2019

Coloration Technology

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The effect of pigment colours, cyan (C), magenta (M) and yellow (Y), and a blend of these (CMY blend) on the printing performance of synthetic leather using a ultraviolet (UV)‐curable water‐borne polyurethane acrylate binder and two types of photoinitiators was investigated. The curing process was carried out at different radiation doses using gallium and mercury UV lamps in combination. The performance of the prints was evaluated with abrasion resistance, crock fastness, gloss and hardness values and K/S. Chemical changes in the cured film structures due to UV curing were analysed by Fourier Transform–infrared spectroscopy measurements. The highest hardness values for clear and pigmented cured films were obtained with a gallium and mercury lamp combination at the highest energy density (1529 mJ/cm2). The highest K/S was obtained for the sample printed with the formulation including the C pigment and cured under a gallium and mercury lamp combination at low energy density (398 mJ/cm2). The M‐pigmented film displayed the highest hardness and abrasion resistance, whereas lower values were obtained with films pigmented with Y and C, and CMY blend, successively. The highest dry and wet crock values were obtained with the formulation including the M pigment. CMY‐pigmented film showed the highest gloss values at all energy densities. The pigment colour affected the curing degree of printed films due to the different absorption/transmission intervals of each colour in the UV spectrum.

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“…Different from the researches reported in the literature, in this study, WPUA binders were synthesized using two different types of polyols (poly (propylene glycol), PPG 1000 and PPG 2000 and poly (ethylene glycol), PEG 1000 and PEG 2000 ) at different molecular weights and DMPA (2,2-bis(hydroxymethyl) propionic acid) at different amounts and their performance for pigment printing on synthetic leather were compared. The synthesized binders were employed in the preparation of pigmented screen-printing formulations as reported in our previous studies (Baysal et al , 2018a, b). The effect of different type of polyols and DMPA amounts used in binder synthesis on the UV-curable pigment printing performance on synthetic leather was investigated and the results obtained were compared with those of a commercial WPUA binder.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ultraviolet (UV)-curable water-borne polyurethane acrylate binders and comparison of their performance for pigment printing on synthetic leather

Baysal

Keleş

Kalav

et al. 2020

IJCST

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PurposeIn this study, it is aimed to synthesize ultraviolet (UV)-curable water-borne polyurethane acrylate (WPUA) binders using different types of polyols (poly (propylene glycol), PPG1000 and PPG2000 and poly (ethylene glycol), PEG1000 and PEG2000) at different molecular weights, DMPA (2,2-bis(hydroxymethyl) propionic acid) at different amounts and isophorone diisocyanate (IPDI) and use for pigment printing on synthetic leather.Design/methodology/approachUV-cured films were characterized by Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimeter (DSC). The effect of binder structure on printing performance was determined with hardness, crock fastness, abrasion resistance and color measurements.FindingsThe highest abrasion resistance (60,000 cycles) and crock fastness values (dry crock and wet crock: 3/4) were obtained with binder PEG-C synthesized with PEG2000 and lower DMPA amount of 4.89 wt%; however, PEG-C binder showed lower hardness values. Due to lower urethane groups in PEG-C binder, more flexible films were obtained which imparted good adhesion property to printing film. Synthesized binders provided lower crock fastness and abrasion resistance properties than commercial WPUA binder.Originality/valuePigmented formulations including UV-curable water-borne synthesized PUA binder were developed and for the first time applied onto synthetic leather using screen printing method. Within this context, a new environmentally friendly printing method was proposed in this study including binder synthesis in the preparation of printing formulations.

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Colour and gloss properties of pigment‐printed synthetic leather using an ultraviolet‐curable water‐borne polyurethane acrylate binder and two photoinitiators at different ratios

Cited by 8 publications

References 32 publications

UV-curable waterborne polyurethane coatings: A state-of-the-art and recent advances review

UV-curable waterborne polyurethane coatings: A state-of-the-art and recent advances review

Effect of pigment colour on the printing performance of synthetic leather using a ultraviolet‐curable water‐borne polyurethane acrylate binder

Synthesis of ultraviolet (UV)-curable water-borne polyurethane acrylate binders and comparison of their performance for pigment printing on synthetic leather

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