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Corrected or non-correted grain ? FILK-QMA-1201 - a method to evaluate finished leather / Haiko Schulz in WORLD LEATHER, Vol. 18, N° 2 (04/2005)
[article]
Titre : Corrected or non-correted grain ? FILK-QMA-1201 - a method to evaluate finished leather Type de document : texte imprimé Auteurs : Haiko Schulz, Auteur ; Michael Meyer, Auteur Année de publication : 2005 Article en page(s) : p. 41-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition
Echantillonnage
Evaluation
Microscopie
Surfaces -- AnalyseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A new method is described and illustrated, which enables differentiation between finished leathers that have been corrected or not. The method is very senstive, and can readily detect leathers that have only been lightly corrected, even when the leathers have been slightly snuffed. Note de contenu : - Sample preparation
- Sample evaluation
- Microscopic analysis of the grain
- Microscopic analysis of the back-side of the finish
- Microscopic analysis of the cross-section
- Panel 1 : Definitions
- Fig. 1a : Leather surface after complete removal of the finish layer.
- Fig. 1b : Leather surface after incomplete removal of the finish layer.
- Fig. 2a : Back-side of the finish layer after removal from a corrected grain leather. No fibres remaining in the finish.
- Fig. 2b : Back-side of the finish layer after removal from a corrected grain leather. Fibres left sticking in the finish.
- Fig. 3 : Leather surface of a full grain leather after successful removal of the finish. The arrows indicate the damage-free sickle- shaped pellicles and the fine structure.
- Fig. 4 : Surface of a lightly snuffed leather after removal of the finish. Parallel cut/grind marks are a clear characteristic of correction.
- Fig. 5 : Surface of a buffed leather after removal of the finish. Truncated hair openings are observed as well as grind marks.
- Fig. 6 : Surface of a heavily buffed leather after removal of the finish. Hair openings disappear in a surface with a suede-like effect.
- Fig. 7 : Surface of a crust leather after light abrasion with buffing paper. Fine cut/grind marks can still be clearly observed.
- Fig. 8 : Back-side of a finish from a full grain leather. The mirror image of the typical grain surface is clearly observed as a result of the base coat flowing into the hair follicles.
- Fig. 9 : Back-side of a finish from a leather that was slightly corrected. The cut/grind marks are clearly visible.
- Fig. 10 : Back-side of a finish from a corrected grain leather. The cut/grind marks are clearly visible as well as the impression of leather fibres that remained adhering to the finish.
- Fig. 11 : Back-side of a finish from a leather that was stucccoed and corrected. The leater substrate was digested by enzymatic treatment.
- Fig. 12 : Cross-section of leather that was not corrected. The curvature of the hair openings is completely preserved.
- Fig. 13 : Cross-section of a corrected leather. The curvature of the hair openings has been lost. They appear truncated,ending at the boundary layer in an acute angle. Base coat penetration into fibre network.En ligne : https://drive.google.com/file/d/1UoFYIeR41eUvEfOECWGfc0ZTIU6kuUYu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32338
in WORLD LEATHER > Vol. 18, N° 2 (04/2005) . - p. 41-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006182 - Périodique Bibliothèque principale Documentaires Disponible Correlating substrate surface analysis to adhesive performance / Michaeleen Pacholski in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 22, N° 11 (11/2015)
[article]
Titre : Correlating substrate surface analysis to adhesive performance Type de document : texte imprimé Auteurs : Michaeleen Pacholski, Auteur Année de publication : 2015 Article en page(s) : p. 15-22 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Adhésifs sensibles à la pression
Cartonnages
Chimie des surfaces
Energie de surface
Essais dynamiques
Pelage
Polyéthylène haute densité
Surfaces -- AnalyseIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : A selection of surfaces relevant to PSAs was characterized by several analytical tools to understand what substrate properties can affect peel. In some cases, such as steel and HDPE panels, the surface chemistry of the substrate is the dominant influence to adhesive performance. In the case of corrugated cardboard, the surface roughness and fiber integrity were critical to adhesion. Comprehensive analysis of the surface chemistry and roughness of the substrate can lead to ideal PSA selection, as well as aid in troubleshooting for any system showing less-than-ideal adhesion.
The data presented in this study also illustrate the importance of considering both the adhesion data and the analytical data simultaneously to determine the factors most important for a given adhesive/substrate system. For example, the surface roughness of the bottles varies, but does not vary systematically with the peel data. But, the surface chemistry of the flame treated bottle (high O and surface polarity) indicates why peel is high. Similarly, both the surface chemistry of the substrate and surface roughness can be investigated to guide troubleshooting where the adhesion is not at the desired level. Lastly, there are specific substrate and adhesive combinations that end users define as key for qualifying adhesives. This study demonstrates that the selection of substrate surfaces has a major impact in determining if a given adhesive meets performance targets.Note de contenu : - EXPERIMENTAL : Adhesives and peel testing - XPS - SIMS - Surface energy - SEM/EDS - Optical profilometry
- RESULTS AND DISCUSSION : HDPE surfaces - Steel panels - Corrugated carboardEn ligne : http://www.adhesivesmag.com/articles/94231-correlating-substrate-surface-analysi [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25618
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 22, N° 11 (11/2015) . - p. 15-22[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17577 - Périodique Bibliothèque principale Documentaires Disponible Correlating thermodynamic and mechanical adhesion phenomena for thermoplastic polyolefins / Daniel J. Burnett in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 2 (06/2007)
[article]
Titre : Correlating thermodynamic and mechanical adhesion phenomena for thermoplastic polyolefins Type de document : texte imprimé Auteurs : Daniel J. Burnett, Auteur ; Rose Ann Ryntz ; Frank Thielmann, Auteur Année de publication : 2007 Article en page(s) : p. 211-215 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Caoutchouc
Interfaces (Sciences physiques)
PolyoléfinesUne polyoléfine, parfois appelée polyalcène, désigne un polymère aliphatique saturé, synthétique, issu de la polymérisation d'une oléfine (aussi appelée un alcène) telle l'éthylène et ses dérivés.
La formule générale est -(CH2-CRR')n-, où R et R' peuvent être l'atome d'hydrogène (H) ou les radicaux alkyle apolaires CH3, CH2-CH3, CH2-CH(CH3)2. Il existe aussi des mousses isolantes souples faites à partir de polyoléfine (pour l'isolation thermique de tuyaux plastiques par exemple).
PRESENTATION : Les polyoléfines forment la plus importante famille de matières plastiques, avec quatre représentants (PP, HDPE, LDPE, LLDPE) parmi les plastiques de grande consommation. La consommation mondiale de ces quatre polymères est évaluée à plus de 60 millions de tonnes en 20001.
Seul un petit nombre de polyoléfines a atteint le niveau industriel :
les polyoléfines thermoplastiques semi-cristallines : polyéthylène (PE), polypropylène (PP), polyméthylpentène (PMP), polybutène-1 (PB-1) ;
les polyoléfines élastomères : polyisobutylène (PIB), éthylène-propylène (EPR ou EPM) et éthylène-propylène-diène monomère (EPDM).
PROPRIETES : En raison de leur nature paraffinique, les polyoléfines sont hydrophobes et possèdent en général une grande inertie chimique (aux solvants, acides, bases, etc.). Ces matériaux ont donc une qualité alimentaire. Le collage est très difficile (la surface est particulièrement inerte, des traitements de surface spéciaux sont nécessaires).
Cependant, ils sont sensibles à l'action des UV, et résistent très peu à l'inflammation car leur indice limite d'oxygène est faible (exemple : ILO ~ 17 pour le polyéthylène).
Leur densité est très faible [0,83 (cas du PMP) < d < 0,95] : ils flottent dans l'eau.
Ils sont opaques, sauf le PMP (transparent).
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Surfaces -- Analyse
ThermoplastiquesUne matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire.Index. décimale : 667.9 Revêtements et enduits Résumé : Polyolefins are used over a wide range of industries due to their low cost and adaptable mechanical properties. However, their low surface energy makes fabricating composites and applying coatings challenging. Therefore, various surface treatments have been utilized to enhance their adhesion properties. In this paper, the surface energies of various thermoplastic polyolefins (TPO) have been measured via Inverse Gas Chromatography (IGC). These surface energy values were correlated to mechanical adhesion testing of the painted polyolefins. The adhesive integrity of the painted TPO was determined by applying a comprehensive-shear load to the material. Higher surface energies measured by IGC lead to increased adhesion with the paint. The surface energies also correlate with TPO crystallinity, as determined by microhardness testing of the unpainted TPO. DOI : 10.1007/s11998-007-9017-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9017-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3664
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 2 (06/2007) . - p. 211-215[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008269 - Périodique Bibliothèque principale Documentaires Disponible Correlation study between image features and mechanical properties of Han Chinese facial skin / L. Ma in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 1 (02/2017)
[article]
Titre : Correlation study between image features and mechanical properties of Han Chinese facial skin Type de document : texte imprimé Auteurs : L. Ma, Auteur ; Y. Tan, Auteur ; S. Zheng, Auteur ; J. Li, Auteur ; C. Jiang, Auteur ; Z. Chen, Auteur ; X. Wang, Auteur Année de publication : 2017 Article en page(s) : p. 93-100 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chinois(e)s
Dermatologie
Mesure -- Instruments
Peau -- analyse
Peau -- Rides
Rugosité
Surfaces -- AnalyseIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Objective : Mechanical properties are considered to be vital factors that influence skin physiology during ageing. Wrinkles and skin roughness are the two main features in aged skin. The purpose of this study is to characterize the relationship between facial skin mechanical properties and image features using quantitative methods.
Methods : Two hundred and forty healthy male and female volunteers living in Shanghai, China (aged 20–70 years), were examined in this study. Facial images were photographed by VISIA-CR. Wrinkle volume of middle forehead and skin roughness of upper cheek were analysed by Skin Surface Analyzer (SSA) software. Mechanical parameters at the middle forehead and upper cheek were measured using Cutometer® MPA 580 and Reviscometer® RVM 600.
Results : Skin wrinkles and roughness increased during ageing, where men have a higher level and earlier manifestation than women. Skin mechanical parameters R2, R5, R7 and RRT were found decreased with age. Moreover, mechanical parameters including R2, R7, RRT and anisotropy showed significant correlations with wrinkle volume and/or skin roughness.
Conclusion : The facial image features including wrinkle volume and skin roughness are significantly correlated with skin elasticity and anisotropy, which could well describe the skin features of Han Chinese.Note de contenu : - MATERIALS AND METHODS : Subjects - Instrument measurements - Statistical analysis
- RESULTS : Demographic data - Influence of ageing and gender on image features of facial skin - Influence of ageing and gender on mechanical properties of facial skin - Relationship between image features and skin mechanical propertiesDOI : 10.1111/ics.12356 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27848
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 39, N° 1 (02/2017) . - p. 93-100[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18648 - Périodique Bibliothèque principale Documentaires Disponible Corrosion in less than one year is the pits ! / Valerie Sherbondy in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 2 (02/2016)
[article]
Titre : Corrosion in less than one year is the pits ! Type de document : texte imprimé Auteurs : Valerie Sherbondy, Auteur ; Richard A. Burgess, Auteur Année de publication : 2016 Article en page(s) : p. 15-21 Langues : Américain (ame) Catégories : Corrosion par piqure
pH
Pipelines -- Corrosion
Pipelines -- Revêtements protecteurs
Protection cathodique
Revêtements poudre:Peinture poudre
Surfaces -- Analyse
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Section Ioss of pipe wall is of great concern in the pipeline industry. Reduced wall thickness due to pitting corrosion can adversely impact pipeline integrity ; the results of which can be catastrophic depending on the product that the pipeline is transporting. In order to reduce the opportunity for corrosion, the use of protective coatings is often supplemented with irnpressed current cathodic protection (CP) systems to protect the pipe from corrosion, pitting and eventual perforation in the event of a breach in the protective coating system. In the instance discussed in this article, a pipe section that was excavated displayed severe pitting despite the application of a proven powder coating system and the installation of an impressed current CP system.
A section of pipeline needed to be excavated in a relatively small area to accommodate new construction in the surrounding area. The pipeline was buried and put into service only about six months earlier, so corrosion and coating failure were not expected. However, failure of the powder coating system and severe pitting was evident on the excavated pipe section. The pipeline owner was notified to witness the excavation and to examine the condition of the pipe.
After the initial section of pipe was excavated, additional lengths of pipe were exposed to determine the extent of the corrosion which was occurring in relatively deep pits that appeared randomly on the pipe sections in two areas. The other sections of excavated pipe revealed no visible corrosion. A section of the 24-inch pipe was removed and replaced. From this section a smaller 15-by-48-inch section was delivered to the laboratory along with a copy of the specification governing the application of the powder coating.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25628
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 2 (02/2016) . - p. 15-21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17889 - Périodique Bibliothèque principale Documentaires Disponible CRP components with class A surfaces / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 6 (06/2012)
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PermalinkDetermination of hydroxyl groups on the surface of TiO2 pigments / Thomas Rentschler in EUROPEAN COATINGS JOURNAL (ECJ), N° 10/97 (10/1997)
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PermalinkEffects of planing and sanding on wood surface properties and coating performance / M. Arnold in SURFACE COATINGS INTERNATIONAL, Vol. 94, N° 5 (10/2011)
PermalinkEurocoat 2016 / (AFTPV) Association Française des Techniciens des Peintures et Vernis / Paris : AFTPVA (2016)
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