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The effect of different radiation sources for the UV curing of a screen-printed, water-based polyurethane acrylate binder / Gökhan Akbulut in COLORATION TECHNOLOGY, Vol. 132, N° 4 (08/2016)
[article]
Titre : The effect of different radiation sources for the UV curing of a screen-printed, water-based polyurethane acrylate binder Type de document : texte imprimé Auteurs : Gökhan Akbulut, Auteur ; Burcak Karaguzel Kayaoglu, Auteur ; Mesut Eren, Auteur ; Bülent Yildiz, Auteur ; Murat Orbay, Auteur Année de publication : 2016 Article en page(s) : p. 270-279 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymère uréthane acrylate
Dioxyde de titane
Impression sur étoffes
Liants
Pâte pigmentaire
Pâtes d'impression
Photoamorceurs (chimie)
Pigments
Rayonnement ultraviolet
Rhéologie
SérigraphieIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In this paper, titanium-dioxide-pigmented printing pastes of water-borne, UV-curable polyurethane acrylate binder with two different UV-curing photoinitiator combinations were prepared and screen printed on a black t-shirt fabric. The effects of mercury and gallium radiation sources employed either singly or in combination for UV curing and the total energy level on the printing performance were investigated. The cured textile samples were subjected to colour measurements before and after five cycles of washing, and hiding power and changes in chromacity, hue, and colour were determined. Single-lamp applications of mercury and gallium were not satisfactory, and opaque pigment hindered deep curing, especially at thicker coating levels. It was found that employment of a mercury–gallium lamp system applying an irradiation at medium level can provide pigment printing of opaque white inks with excellent coverage, washing resistance, and medium hardness. Note de contenu : - UV-radiation curing and pendulum hardness
- Fourier transform infrared spectroscopy
- Rheological behaviour of pigment pastes
- CIELab colour, coverage, ang gloss measurement of printed fabrics
- Photographic images of washed printed samplesDOI : 10.1111/cote.12219 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12219 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26729
in COLORATION TECHNOLOGY > Vol. 132, N° 4 (08/2016) . - p. 270-279[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18246 - Périodique Bibliothèque principale Documentaires Disponible The effect of ultraviolet-curable water-borne polyurethane acrylate binder concentration on the printing performance of synthetic leather / Gülçin Baysal in COLORATION TECHNOLOGY, Vol. 135, N° 2 (04/2019)
[article]
Titre : The effect of ultraviolet-curable water-borne polyurethane acrylate binder concentration on the printing performance of synthetic leather Type de document : texte imprimé Auteurs : Gülçin Baysal, Auteur ; Berdan Kalav, Auteur ; Burcak Karaguzel Kayaoglu, Auteur Année de publication : 2019 Article en page(s) : p. 111-120 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie
Copolymère uréthane acrylate
Cuir synthétique imprimé
Dureté (matériaux)
Formulation (Génie chimique)
Haut extrait sec
Liants
Photoréticulation
Polymères en émulsion
Rayonnement ultraviolet
Résistance à l'abrasion
Résistance au chocs
Revêtements en phase aqueuse
Sérigraphie
Solidité de la couleurIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, synthetic leather samples were screen printed with pigmented pastes including two types of photoinitiators and three different concentrations of ultraviolet (UV)-curable water-borne polyurethane acrylate binder. The curing process was conducted under different combinations of lamps (gallium, mercury, gallium/mercury and gallium/gallium/mercury) at three power levels. Abrasion resistance, crock fastness, hardness and colour strength were investigated. Chemical changes in the clear and pigmented film structures because of UV curing were analysed by Fourier Transform-infrared spectroscopy measurements. In hardness measurements, the highest hardness values were obtained with clear and pigmented formulations which have the highest solid content (57%). In colour measurements, higher K/S values were obtained in samples printed with the formulation having a binder concentration of 46%. Wet crock fastness values improved as the energy level increased during curing, and the highest values were obtained with a formulation which had a binder concentration of 57%. Greater amounts of binder in the formulations and increased amounts of energy applied to the surface during curing increased the hardness value of the prints, thus better abrasion resistance was obtained. Overall results suggested that the highest hardness, crock fastness and abrasion resistance values were obtained with the formulation with a binder concentration of 57%. However, for ease of application, printing efficiency and colour strength, the formulation with a binder concentration of 46% is recommended for printing, and curing under consecutive passes with gallium and mercury lamps at 120 W/cm is proposed in terms of energy efficiency and printing performance. Note de contenu : - EXPERIMENTAL : Materials - Methods
- RESULTS AND DISCUSSION : UV curing and pendulum hardness measurements
- Fourier transform infrared (FTIR) spectroscopy - Colour measurements - Crock fastness of printed synthetic leather samples - Martindale abrasion resistance measurements of printed synthetic samplesDOI : 10.1111/cote.12382 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12382 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32324
in COLORATION TECHNOLOGY > Vol. 135, N° 2 (04/2019) . - p. 111-120[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20869 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : The heart of the matter : Alternative ways to achieve low gloss and soft touch UV/EB coatings Type de document : texte imprimé Auteurs : Xavier Drujon, Auteur Année de publication : 2018 Article en page(s) : p. 20-26 Langues : Anglais (eng) Catégories : Agent mattant
Brillance (optique)
Copolymère uréthane acrylate
Diluants
Excimères
Lampes à excimère
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Revêtements anti-adhésifs -- Séchage sous rayonnement électronique
Revêtements anti-adhésion -- Séchage sous rayonnement ultraviolet
Rhéologie
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Toucher softIndex. décimale : 667.9 Revêtements et enduits Résumé : It can be difficult to obtain matt finishes with 100% solids UV curable coatings. differents ways of achieving this are compared, including various matting silicas, polyamide ultrafine powders and the use of excimer pre-cure to produce a 'wrinkled' surface. Good results could be obtained but were highly dependent on formulation variables. Note de contenu : - Why 100% UV curable formulations are hard to matt
- Silica matting agents evaluated and compared
- Different diluents show large variations in rheology
- Polyamide matting agents show high efficiency
- Principles of matting by excimer pre-cure
- Practical evaluation of excimer pre-cure
- Effects of excimer on different monomers compared
- A range of options for matting
- TABLES : 1. Properties of silica matting agents - 2. Properties of selected reactive diluents - 3. Visual appearance of dispersion of silica mattings aids in reactive diluents : haziness, ranked from 1 = clear to 10 = white ; S = sedimentation after 24 hours, with assessment of their rheological behaviour in the same reactive diluents - 4. Properties of selected urethane acrylate - 5. Gloss comparison for various urethane acrylates with and without excimer pre-cure (applied at 10-8 µm on steel) - 6. Gloss comparison for UA1/HDDA, system with various cure conditions - 7. Properties of selected acrylate monomers - 8. Gloss and appearance for UA1/monomer formulations cured with excimer lamp
- FIGURES : 1. Viscosity at low shear rate (0.1 s-1) )Pa.s) for silica matting aids in reactive diluents - 2. Representation of rheological behaviour - 4. 3D surface imaging based on microscopic image of an excimer cured coating. Red areas are hills, and blue areas valleysEn ligne : https://drive.google.com/file/d/1A4qXwmTvRp1TpdipHnPzfeNeI0BWsLHQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30588
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2018) . - p. 20-26[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19900 - Périodique Bibliothèque principale Documentaires Disponible The path to greater resistance / Abhishek Srivastava in EUROPEAN COATINGS JOURNAL (ECJ), N° 6 (06/2018)
[article]
Titre : The path to greater resistance : Effect of reactive diluents on UV-curable wood coating properties Type de document : texte imprimé Auteurs : Abhishek Srivastava, Auteur Année de publication : 2018 Article en page(s) : p. 26-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements
Brillance (optique)
Copolymère uréthane acrylate
Diluants
Essais dynamiques
Formulation (Génie chimique)
Mesure
Polyesters
Polymères -- Synthèse
Polyols
Polyuréthanes
Résistance à l'abrasion
Revêtements -- Propriétés chimiques
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : UV-curable polyurethane acrylate wood coatings were studied with the aim of enhancing protective and decorative properties. Adding reactive diluents may improve coating hardness, ease of application as well as resistance to abrasion and chemicals but it is a delicate balance. Incorporating too much of the diluents can cause micro-distortions on the surface, and brittleness - impairing gloss and scratch resistance. Note de contenu : - Experimental : Polyester polyol synthesis - Urethane acrylate synthesis - Polyurethane acrylate synthesis - Measurements - Preparation of coating samples - UV curing of samples - PU-acrylate resin analysis shows low molecular weight - Reactive diluents improve coating resistance - Scratch hardness
- Abrasion resistance
- Gloss at 60° angle
- Pencil hardness
- Cross hatch hardness
- Hydrocarbon chain in hdda results in better chemical resistance
- Excellent stain resistance
- Correct balance of reactive diluents enhances performance
- FIGURES : 1. Acid value of polyester polyol - 2. Hydroxyl value of a) polyester polyol and b) PU acrylate resin - 3. IR spectrum of the PU-acrylate resin - 4. Molecular weight of PU-acrylate resin
- TABLES : 1. Formulation of coating samples - 2. Viscosity and refractive index of coating samples - 3. IR spectrum of the PU-acrylate resin
En ligne : https://drive.google.com/file/d/1Bm5rZ9Ypm6YgAwLm2o53LpPBzIv1YWf9/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30721
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 6 (06/2018) . - p. 26-32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20010 - Périodique Bibliothèque principale Documentaires Disponible The right dose for the right cure / Xavier Drujon in EUROPEAN COATINGS JOURNAL (ECJ), N° 5 (05/2020)
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Titre : The right dose for the right cure : Effect of acrylate monomer and oligomer selection on the properties of cured coatings Type de document : texte imprimé Auteurs : Xavier Drujon, Auteur Année de publication : 2020 Article en page(s) : p. 18-23 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymère uréthane acrylate
Monomères
Oligomères
Revêtements -- Propriétés chimiques
Revêtements anti-adhésifs -- Séchage sous rayonnement électronique
Revêtements anti-adhésion -- Séchage sous rayonnement ultraviolet
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : UV is by far the most common source of radiation-curing energy, and is widely used for coatings on heat-sensitive substrates. It has expanded significantly into a multiplicity of other applications, this expansion being driven by performance, economics and environmental considerations. However, EB technology can be more relevant in some high-speed and high-volume applications and can be expected to contribute substantially to the growth of radiation curing in the future. Note de contenu : - EB to boost growth of radiation curing
- Experimental : Raw materials - Equipment and method
- Reactivity
- Solvent resistance
- Higher voltage is better
- Hardness
- Double-bond conversion unexpectedly lower
- EB and UV curing of ethoxylated TMPTAS
- Hardness tails off under UV
- Fig. 1a : EB curing of UA3 (f=6) under an applied voltage of 80 kV and varying dose
- Fig. 1b : EB curing of UA2 (f=2) under and applied voltage of 80 kV and varying dose
- Fig. 2 : Hardness (Persoz) of various UAs as a function of diluting monomer and type of cure
- Fig. 3 : Hardness as a function of the wt% ethoxy in the monomer for 60/40 UA5/TMPX(EO)TA blends cured by EB and UV
- Table 1 : Acrylate-functional monomers
- Table 2 : Acrylate-functional urethane acrylate oligomers
- Table 3 : Cure of UA3 (f=6) with a dose of 30 kGy under different voltages
- Table 4 : DMA and FTIR analysis of UA4/HDDA films cured by UV and EB
En ligne : https://drive.google.com/file/d/1qZ0Hhncpnue3mOGsHUOs1fKZDf4bgjaS/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34172
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2020) . - p. 18-23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21745 - Périodique Bibliothèque principale Documentaires Disponible Utilizing Taguchi design of experiment to study the surface treatment of a nanosilica with an acrylic silane coupling agent and revealing the dispersibility of particles in a urethane acrylate resin / Y. Zamani Ketek Lahijani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)
PermalinkUV curing polymers in leather finishing / M. A. Knight in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 1 (01-02/1978)
PermalinkVersatile waterborne, presents a novel value-in-use waterborne energy curable polyurethane and considers product robustness as a key driver for innovation / Xavier Deruyttere in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4592 (01/2014)
PermalinkWorld rally champion's super-car benefits from lightweight composite body panels / Brian Grealish in JEC COMPOSITES MAGAZINE, N° 82 (07/2013)
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