Effect of spinneret shapes on the properties of polyester filament / Ranjit Turukmane in CHEMICAL FIBERS INTERNATIONAL, Vol. 71, N° 3 (09/2021)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 71, N° 3 (09/2021) . - p. 130-131 Titre : Effect of spinneret shapes on the properties of polyester filament Type de document : texte imprimé Auteurs : Ranjit Turukmane, Auteur ; Sanjay Shinde, Auteur ; Sujit S. Gulhane, Auteur ; K. K. Gupta, Auteur Année de publication : 2021 Article en page(s) : p. 130-131 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Extrusion filage Fibres polyesters Fibres textiles -- Propriétés mécaniques Fil partiellement orienté Filaments Fibre de longueur infinie ou extrême comme celle qu'on trouve dans la soie à l'état naturel. Les fibres manufacturées sont extrudées en filaments qui sont transformés en fils continus, en fibres courtes ou en câbles. Polyéthylène téréphtalate Index. décimale : 668.5 Parfums et cosmétiques Résumé : The effect of fiber cross-sectional shape on the structure and properties of polyester (PET) yarns have been investigated by the selection of partially oriented polyester yarn (PET POY), which was produced under the same spinning conditions through different spinnerets in a melt spinning plant. The only difference between the fibers are the cross-sectional shapes of spinneret. The different cross-sectional shapes were selected for the experimental work viz. circular, hollow, trilobal, octalobal and delta. The specialty spinnerets which produced yarn will be considered for different applications in carpets and home textiles, whereas circular cross-section yarn will be considered for denim fabric manufacturing. The major difference within the cross-sectional shapes are influenced due to their modulus, higher strain, yield stress, and boiling water shrinkage. No effects on the crystallinity and higher stress were deter¬mined. It was found that 350/96 PET POY shows improved results with circular cross-section at all stages. Note de contenu : - Effect of trilobal shape spinneret on tenacity and elongation of PET filament - Effect of delta shape spinneret on tenacity and elongation of PET filament - Comparative analysis of 350/96 denier PET filament for tenacity and elongation properties - Table : Spinneret details - Fig. 1 : Effect of circular shape spinneret on tenacity and elongation of PET filament - Fig. 2 : Effect of trilobal shape spinneret on tenacity and elongation of PET filament - Fig. 3 : Effect of delta shape spinneret on tenacity and elongation of PET filament - Fig. 4 : Comparative analysis of tenacity and elongation of PET filament En ligne : https://drive.google.com/file/d/17d_O9L2sK2F0pJN2Lkb44xOb8JH7Rpml/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36233 [article]

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Elementary study of IR reflectance properties of organic and inorganic pigment formulation / K. K. Gupta in PAINTINDIA, Vol. LIV, N° 4 (04/2004)

[article]  inPAINTINDIA > Vol. LIV, N° 4 (04/2004) . - p. 45-60 Titre : Elementary study of IR reflectance properties of organic and inorganic pigment formulation Type de document : texte imprimé Auteurs : K. K. Gupta, Auteur ; G. N. Mathur, Auteur ; V. S. Tripathi, Auteur Année de publication : 2004 Article en page(s) : p. 45-60 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Each of the earthen object wether it is a part of nature or made by man has its specific reflectance profile not only in visual part but in other parts of electromagnetic spectrum also. This is the characteristic fingerprint of the object. This has given birth to various kinds of sensor/detectors working in specific band of spectrum. The phenomenon of vision lies on the contrast of object to immediate surrounding. No contrast no vision is formed. For camouflaging point of view, it needs to simulate the reflectance profile of objects with the immediate surrounding. The most common sensor available with the service are telescope, binoculars, night vision devices, IR photographic, film, IR cameras and thermal imagery systems etc. working in 800-1200nm and 3-5 µm wave length band. For matching the reflectance of the military objects/equipments/troops, they need coating or painting of pigment formulation to be applied directly on surface of equipment or in the form of textile covering systems which might simulate visual and IR reflectance properties. All the military objects i.e. vehicles, tanks or other artilleries and troops need to be camouflaged to hide from adversary. Presently, the army is equipped with various types of detecting sensors other than conventional binoculars and telescope working in visual band of electromagnetic regions only (350-750nm). Therefore, a vibrand need arises to study the reflectance properties of each part ofnature in entire range of electromagnetic radiation ranging i.e. from 350-1200nm. To protect the object against visual detection (400-750nm) and NIR (750-1200nm) region of electromagnetic spectrum, it needs to blend the object with surrounding in term of reflectance in these wave length bands. Note de contenu : - LITERATURE SURVEY : Organic and inorganic pigments - Optical behaviour of pigments - Near infrared - OBJECTIVE OF PIGMENT FORMULATION : Study of NIR properties of natural objects (pigments details - binder used) - Study and evaluation - Study and observation of single pigment - Study of formulation using two pigments - Study of pigment formulations using three pigments - Study of the combination of four pigments. - RESULTS AND DISCUSSIONS : 1) Formulations using single pigments - 2) Formulations using two pigments - 3) Formulations using three pigments - 4) Formulation using four pigments Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12006 [article]

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