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Vacuum dispensing of ignition coils : sophisticated technology affordable in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 22, N° 4 (04/2015)  

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 22, N° 4 (04/2015) . - p. 23-25 Titre : Vacuum dispensing of ignition coils : sophisticated technology affordable Type de document : texte imprimé Année de publication : 2015 Article en page(s) : p. 23-25 Langues : Américain (ame) Catégories : Adhésifs dans les automobiles Automobiles -- Moteurs -- Pièces Bobines d'induction Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : The coating process is one of the most complicated steps in the production of automotive ignition coils. Since it can also be the most expensive, many automotive suppliers are hesitant to implement complex machinery. However, an alternative to expensive custom-built systems has been developed that provides an economic solution for small- to medium-sized automotive suppliers.* The proven vacuum dispensing system consists of a standardized set of modules that can be combined into a repeat-accurate vacuum production system. The system can be sized to suit any budget, and equipment modules can be customized for ignition coil production. The production line modules are manufactured in volume production, offering an advantage over custom systems. En ligne : http://www.adhesivesmag.com/articles/93781-adhesives-at-work-vacuum-dispensing-o [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23778 [article]

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Filters reduce false sealant failures in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 22, N° 4 (04/2015)  

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 22, N° 4 (04/2015) . - p. 27-30 Titre : Filters reduce false sealant failures Type de document : texte imprimé Année de publication : 2015 Article en page(s) : p. 27-30 Langues : Américain (ame) Catégories : Adhésifs dans les automobiles Détection de défauts (Ingénierie) Filtration Imagerie numérique Mesures optiques Produits d'étanchéité Qualité -- Contrôle Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Filtering can substantially reduce manual sealant inspection time, thus speeding up the automotive production line. An automotive supplier uses a machine vision system to inspect up to 900 parts per min to substantially improve quality and productivity. The system checks for the presence and uniformity of a bead of sealant applied to the interior of a metal canister (see Figure 1). During the application development, Chris Walker, project manager for Epic Systems Inc., which provides turnkey solutions for advanced automation and machine vision systems, wanted to reduce the number of false failures—good parts that were mistakenly identified as bad by the machine vision system. In addition, Walker wanted to reduce the time required for inspection to accommodate planned future increases in line speed. He used a setup of polarizing filters and an ultraviolet (UV)/infrared (IR) filter to eliminate glare. The elimination of glare substantially reduced the number of false failures and also made it possible to reduce the number of digital image filters in the vision algorithm, reducing inspection time from 85 to 65 milliseconds. Note de contenu : - Solving inspection challenge - Addressing glare problems - Filtering improves line speed En ligne : http://www.adhesivesmag.com/articles/93782-adhesives-at-work-filters-reduce-fals [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23779 [article]

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Adhesives at work : U.S. Coast guard turns to electrocoat primer system in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 22, N° 4 (04/2015)  

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 22, N° 4 (04/2015) . - p. 33-34 Titre : Adhesives at work : U.S. Coast guard turns to electrocoat primer system Type de document : texte imprimé Année de publication : 2015 Article en page(s) : p. 33-34 Langues : Américain (ame) Catégories : Anticorrosion Dépôt électrolytique Industries aérospatiales -- Matériaux Primaire (revêtement) Revêtements protecteurs Index. décimale : 668.3 Adhésifs et produits semblables Résumé : An eco-friendly aerospace primer saves time and weight while enhancing corrosion resistance. En ligne : http://www.adhesivesmag.com/articles/93783-adhesives-at-work-us-coast-guard-turn [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23780 [article]

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Formation and determination of aldehydes in amine catalysts / Bhajendra Barman in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 22, N° 4 (04/2015)  

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 22, N° 4 (04/2015) . - p. 37-42 Titre : Formation and determination of aldehydes in amine catalysts Type de document : texte imprimé Auteurs : Bhajendra Barman, Auteur Année de publication : 2015 Article en page(s) : p. 37-42 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Catalyseur à amines -- Teneur en aldehydes Chimie analytique Polyuréthanes Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Tertiary amine catalysts used for manufacturing polyurethanes and polyisocyanurates are known to degrade over time, producing products such as aldehydes that can directly contribute to emissions of organic compounds. To remain within the tolerable exposure limits, an analytical method with sufficient accuracy is needed to ensure that no or low concentrations of aldehydes are present in the catalyst samples. Recently, a systematic analytical approach was reported for the accurate determination of aldehydes present in amine catalysts or amines by liquid chromatography using ultraviolet (UV) detection of their 2,4-dinitrophenylhydrazone derivatives.1 Based on various factors controlling the derivatization of aldehydes, optimum conditions were selected for the accurate determination of aldehydes. In addition, probable reaction mechanisms in both acidic and basic conditions were highlighted. Since amine catalyst solutions in water are basic, it is important to have a clear understanding of the derivatization of aldehydes present in these materials, specifically, by looking at the effects of solution pH, derivatization reaction time and the number of active nitrogen atoms in amines. It was found that only a small fraction of aldehydes present in the amine can be derivatized in a basic environment. It appeared that most of the reaction steps in the near neutral and basic environments are kinetically slow and equilibrium limited. Ideally, the derivatization using 2,4-dinitrophenyl-hydrazine (DNPH) can be completed in an acidic environment, specifically, at pH around 2 with an excess amount of DNPH. In this work, aldehyde data for four amine catalyst samples containing 1-3 nitrogen atoms have been obtained. The structures and chemical names of these amine catalyst samples are provided in Figure 1. This article intends to address issues related to the formation and accurate determination of aldehydes in amine catalysts used in the polyurethane industry. Note de contenu : - MATERIALS AND METHODS : Reagents and samples - Derivatization and determination of aldehydes - Oxidation of amine catalyst with ambient air - DEGRADATION OF TERTIARY AMINE CATALYST AND FORMATION OF ALDEHYDES - EFFECTS OF PH AND REACTION TIME ON DNPH DERIVATIZATION - MECHANISMS OF DERIVATIZATION En ligne : http://www.adhesivesmag.com/articles/93784-formation-and-determination-of-aldehy [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23781 [article]

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Using rheology to formulate sealants / C. Street in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 22, N° 4 (04/2015)  

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 22, N° 4 (04/2015) . - p. 47-49 Titre : Using rheology to formulate sealants Type de document : texte imprimé Auteurs : C. Street, Auteur ; G. Frazee, Auteur ; C. Fredrickson, Auteur ; I. Harvey, Auteur ; T. H. Kililea, Auteur Année de publication : 2015 Article en page(s) : p. 47-49 Langues : Américain (ame) Catégories : Formulation (Génie chimique) Matières premières Produits d'étanchéité Rhéologie Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Through quantitative measurements of sealant structure and flow behavior, rheology helps formulators understand the relationship between formulation components and their impact on application properties. This article demonstrates the link between raw material variables and the rheological and application properties of formulated sealants, beginning with a brief introduction to rheological terms relevant to sealants. Experimental formulation components studied include pigment-to-binder ratio, surfactant loading, volatile oil amount and rheological modifier amount. The insights gained from rheology significantly accelerate sealant development and drive product differentiation. En ligne : http://www.adhesivesmag.com/articles/93786-using-rheology-to-formulate-sealants Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23782 [article]

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Two-part adhesives and application equipment / Stephanie Shira in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 22, N° 4 (04/2015)  

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 22, N° 4 (04/2015) . - p. 51-54 Titre : Two-part adhesives and application equipment Type de document : texte imprimé Auteurs : Stephanie Shira, Auteur Année de publication : 2015 Article en page(s) : p. 51-54 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Matériaux Colles bi-composante:Adhésifs bi-composant Construction -- Matériaux Dispersions et suspensions Industries aérospatiales -- Matériaux Mélanges (chimie) Polyuréthanes Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Two-part adhesives are an ever-growing segment of the adhesive and sealant industry, with applications in aerospace, construction, automotive, consumer goods, and the DIY/repair sectors. With the U.S. accounting for roughly one-third of the adhesives used worldwide, demand for cost-effective, efficient products that meet the desired criteria—formulating, mixing, metering, and dispensing—are all critical components that must be identified and optimized to ensure that quality and quantity demands are met. Many different starting materials are available in the formulation of two-part adhesives, all of which will require a variety of mixing, dispensing and application methods. A discussion of such breadth and depth is covered in the wide assortment of texts,1 with this article focusing primarily on two-part (2K) polyurethane (PUR) reactive adhesives, which cure at room temperature, and the mixing conditions to consider when selecting equipment. Table 1 provides a brief summary of various properties that should be considered throughout the numerous steps in the manufacture of a 2K PUR system. Note de contenu : - Ambient-cure 2K PUR adhesives - Dispersing 2K PUR adhesives - Mixing 2K PUR adhesives En ligne : http://www.adhesivesmag.com/articles/93787-two-part-adhesives-and-application-eq [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23783 [article]

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Adhesives & Sealants Industry - Vol. 22, N° 4 - 04/2015 URL