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Barrier screw compounding and mechanical properties of EAA copolymer and cellulose fiber composite / Ruth Ariño in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 4 (08/2013)
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Titre : Barrier screw compounding and mechanical properties of EAA copolymer and cellulose fiber composite Type de document : texte imprimé Auteurs : Ruth Ariño, Auteur ; A. Boldizar, Auteur Année de publication : 2013 Article en page(s) : p. 421-428 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres végétales -- Extrusion
Composites à fibres végétales -- Moulage par injection
Composites à fibres végétales -- Propriétés mécaniques
Copolymère éthylène acide acrylique
Distribution et orientation des fibres
Fibres cellulosiques
Vis barrièreIndex. décimale : 668.4 Plastiques, vinyles Résumé : The difficulty of feeding cellulose fibers and thermoplastics into the extruder or injection molding machine is addressed, this being a serious problem in the production of cellulose fiber composites for industrial applications. Agglomerates consisting in cellulose fibers and ethylene-acrylic acid copolymer (EAA) with different cellulose contents and different fiber lengths were processed with two different screws in order to better understand how the dispersion of the fibers can be improved by melt extrusion. A conventional screw with a compression ratio of 4:1 and a screw with barrier flights were used at different screw rotation speeds. The fiber length and fiber content were measured and microscopic analyses were performed in order to estimate the number and size of the cellulose fiber aggregates in the final composites. It was concluded that the barrier screw was more effective than the conventional screw in breaking up the fiber aggregates and dispersing the fibers. More but smaller cellulose aggregates were observed when the barrier screw was used, and the reduction of length was significantly greater for long than for short fibers. In contrast to that was expected, the samples containing the shorter fibers had better mechanical properties, probably due to a better dispersion of the fibers. Note de contenu : - EXPERIMENTAL : Materials - Melt processing - Measurements
- RESULTS AND DISCUSSION : Visual characterization - Microscope image characterization - Fiber dimensions - Fiber content - Tensile propertiesDOI : 10.3139/217.2772 En ligne : https://drive.google.com/file/d/1pc6ZPOsiGncrnENBDZ83P7k0asTzKHEK/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19287
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVIII, N° 4 (08/2013) . - p. 421-428[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15396 - Périodique Bibliothèque principale Documentaires Disponible High performance acrylic emulsion for paper-to-foil laminating adhesive / Jose P. Lalas in ADHESIVES AGE, Vol. 38, N° 13 (12/1995)
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Titre : High performance acrylic emulsion for paper-to-foil laminating adhesive Type de document : texte imprimé Auteurs : Jose P. Lalas, Auteur Année de publication : 1995 Article en page(s) : p. 22-23 Langues : Américain (ame) Catégories : Adhésifs en phase aqueuse
Adhésion
Aliments -- Emballages
Copolymère éthylène acide acrylique
Huiles et graisses
Polyacryliques
Résistance à l'humidité:Résistance à l'eau
Résistance chimique
Résistance thermique
StratifiésIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Paper-to-foil lamination is used to manufacture packaging materials for a variety of foods, such as margarine, butter and oily snack foods. Casein/SBR and ethylene acrylic acid (EAA) adhesive technologies currently dominate the paper-to-foil laminating market. Casein/SBR offers the adhesive formulator adhesion, water resistance and heat resistance. However, these advantages are offset by odors due to the SBR component and the increasing price fluctuation and variable quality of casein. EAA offers the advantage of low odor and better grease resistance than the casein/SBR system, but at high costs. With the disadvantages associated with existing technologies, there is a need for a new laminating adhesive polymer that delivers a more attractive balance of cost and performance. Note de contenu : - Laminate preparation
- Adhesion
- Water resistance
- Blister/Tunneling, static test
- Heat resistance
- Grease resistanceEn ligne : https://drive.google.com/file/d/1xElVMYRF37d1Zhca0_xm1lakPwvaDT4o/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20798
in ADHESIVES AGE > Vol. 38, N° 13 (12/1995) . - p. 22-23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001058 - Périodique Bibliothèque principale Documentaires Disponible Injection molding of beverage container caps made of a composite consisting of wood cellulose fiber and an ethylene-acrylic acid copolymer / Ruth Ariño in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 4 (08/2014)
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Titre : Injection molding of beverage container caps made of a composite consisting of wood cellulose fiber and an ethylene-acrylic acid copolymer Type de document : texte imprimé Auteurs : Ruth Ariño, Auteur ; A. Boldizar, Auteur Année de publication : 2014 Article en page(s) : p. 507-514 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Bois
Composites à fibres végétales -- Moulage par injection
Composites à fibres végétales -- Propriétés mécaniques
Compoundage
Copolymère éthylène acide acrylique
Essais dynamiques
Etanchéité
Fibres cellulosiques
Fibres végétales
Longueur -- Mesure
Polyéthylène haute densité
Rhéologie
Traction (mécanique)Index. décimale : 668.4 Plastiques, vinyles Résumé : The influence of processing parameters on injection-molded bottle caps consisting of 20 wt% of cellulose fibers and an ethylene-acrylic acid copolymer was studied. The study included three cylinder barrel temperatures and three mold temperatures. For each combination of temperatures, the holding pressure time was varied and the mold sealing time was determined. High density polyethylene caps were also produced as reference material, and injection-molded tensile test bars were also produced in order to assess the tensile mechanical properties. The results showed no major differences in sealing time for the caps containing cellulose fibers, except for the highest melt and mold temperatures where a slightly longer time was observed. The viscosity of the composite material was higher than that of the polymeric matrix. For the highest temperature and high shear rates, the viscosity of the composite material was close to the viscosity of the matrix material. The moisture content of the injection-molded bars was less than 1 %, showing that almost no water was absorbed during the compounding or after several months. The crystallinity decreased when the fibers were included but was not influenced by the mold temperature. Enhanced mechanical properties were obtained by using the fibers compared to the pure ethylene-acrylic acid copolymer, both in the tensile test bars and in the caps. The reference high density polyethylene had, however, a higher mechanical performance than the composite. Note de contenu : - EXPERIMENTAL : Materials - Compounding of composite material - Injection molding - Sealing time measurement - Differential scanning calorimetry (DSC) - Thermogravimetric analysis (TGA) - Rheological measurements - Fiber length measurements - Mechanical properties
- RESULTS AND DISCUSSION : Sealing times - DSC measurements - TGA measurements - Rheological measurements - Fiber length - Mechanical propertiesDOI : 10.3139/217.2899 En ligne : https://drive.google.com/file/d/1H1SH3_MVGc-PgAXEBOZISsMlJxtpUcHP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21830
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Code-barres Cote Support Localisation Section Disponibilité 16454 - Périodique Bibliothèque principale Documentaires Disponible Melt processing of wood cellulose tissue and ethylene-acrylic copolymer composites / Ruth Ariño in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 4 (08/2013)
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Titre : Melt processing of wood cellulose tissue and ethylene-acrylic copolymer composites Type de document : texte imprimé Auteurs : Ruth Ariño, Auteur ; A. Boldizar, Auteur Année de publication : 2013 Article en page(s) : p. 429-436 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Composites à fibres végétales -- Propriétés mécaniques
Copolymère éthylène acide acrylique
Extrudeuse bi-vis
Extrudeuses
Mélange
Textiles et tissus
Vis barrièreIndex. décimale : 668.4 Plastiques, vinyles Résumé : The difficulty of feeding cellulose fibers together with the polymer into the melt processing equipment is a serious disadvantage for the production of cellulose-containing composites on a large scale. In the present work, a continuous method of feeding cellulose in the form of a tissue into a twin-screw extruder through an opening downstream of the extruder cylinder was studied. With this method, composites with different fiber contents were obtained. The tissues used were one made mainly of softwood fibers and another mainly of hardwood fibers. In order to better understand how to improve the fiber dispersion by melt mixing, a second extrusion was performed with a single screw extruder with a barrier-flighted screw and also with the twin-screw used to compound the tissue with the polymer. The compounds produced were then injection molded into test bars. The test bars containing the softwood tissue exhibited some fiber aggregates also after a second extrusion, whereas no fiber aggregates were observed in samples made with the tissue containing hardwood fibers and two passes through the twin screw. The fiber length was in general reduced by each melt processing stage and the shortest fiber length was observed after two extrusions with the twin-screw and injection molding. The tensile modulus increased with increasing fiber content. A higher stiffness was obtained with more softwood fibers in the tissue whereas more hardwood fibers gave a higher tensile strength and greater elongation at break. Note de contenu : - EXPERIMENTAL : Materials - Melt processing - Measurements
- RESULTS AND DISCUSSION : Fiber content - Visual characterization - Microscope analysis - Fiber length - Tensile propertiesDOI : 10.3139/217.2773 En ligne : https://drive.google.com/file/d/1aA9xrzdk3bKtvqEBDoxAnBQfQR8_xdi7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19288
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Code-barres Cote Support Localisation Section Disponibilité 15396 - Périodique Bibliothèque principale Documentaires Disponible Storage-stable, fiber-reinforced adhesive films / Claude Hosotte in ADHESION - ADHESIVES + SEALANTS, Vol. 18, N° 2/2021 (2021)
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Titre : Storage-stable, fiber-reinforced adhesive films Type de document : texte imprimé Auteurs : Claude Hosotte, Auteur ; Raphael Schaller, Auteur Année de publication : 2021 Article en page(s) : p. 12-16 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Adhésifs -- Stockage
Copolymère éthylène acide acrylique
Essais de pelage
Fibre aramide
Fibres à orientation unidirectionnelle
Films adhésifs
Films adhésifs -- Propriétés mécaniques
Polyuréthanes
Stabilité au stockage
StratifiésIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : The desire for lightweight yet strong composite materials is echoed by various industries confronted with new, often extreme, requirements. With this in mind, Nolax has developed fiber-reinforced adhesive films that combine toughness and high tensile strength combined with low weight and outstanding flexibility. Note de contenu : - From fabric to yarn and filament
- The Nolax matrix : solvent-free and storage-stable
- Crosslinking on demand
- Customized properties
- Thermal and alternating climate resistance
- Storage-stable for over 12 months
- Fig. 1 : A membrane sail in action
- Fig. 2 : Fiber-reinforced adhesive films from Nolax. Unidirectionally arranged filaments are embedded in an adhesive and can be processed at elevated temperature and pressure, for example, into membrane sails
- Fig. 3 : Stress-strain diagram of a filament, yarn and fabric made of aramid. The zigzag path of yarns in a fabric significantly reduces their performance compared to a single filament
- Fig. 4 : Continuous multi-filament yarns are unwound, spread and impregnated. This process produces fiber-reinforced adhesive films with typical weights of <100 g.m-2.
- Fig. 5 : Calculated off-axis Young's moduli of the fiber-reinforced adhesive film T52.5110 and their laminates - unidirectional : one layer of fiber-reinforced adhesive film, cross-ply laminate : two layers in fiber directions (0°/90°), quasi-isotropic laminate : four layers with fiber directions (0°/45°/90°/135°), (a) measurements of Young's modulus at 0°, 45° and 90° to the fiber orientation in T52.5110. The Tsai-Hill criterion [5] was used to calculate the off-axis Young's moduli
- Fig. 6 : Tensile force k1% value (the force at 1% elongation) versus number of plies of (a) Nolax T51.5000 with 15 g.m-2, in comparison with a (a) standard polyester fabric 450 g.m-2, single layer
- Fig. 7 : T-Peel force at 20°C and 80°C of laminates with two layers of fiber-reinforced films
- Fig. 8 : Plotting the T-peel force of laminates against the storage time of the fiber¬reinforced adhesive films. The unidirectional laminates consist of 10 layers of T51.5000 (weight 15 g.m-2) dried at (a) 50 °C or (1:1) 60 °C - with a line speed of 8 m.min-' and a drying section of approx. 25 m
- Table 1 : Overview of the mechanical properties (in fiber direction), density and application temperature of three different fiber-reinforced adhesive films
- Table 2 : SAFT values before and after the climate change test Nolax (LRPU : latent-reactive polyurethane / EAA: ethylene-acrylic acid copolymer)En ligne : https://drive.google.com/file/d/1KlOKDigHhWBmKEKGedtG0pCyUK4M7914/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35693
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Code-barres Cote Support Localisation Section Disponibilité 22711 - Périodique Bibliothèque principale Documentaires Disponible 22769 - Périodique Bibliothèque principale Documentaires Disponible