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Establishment of gas counter pressure technology and its application to improve the surface quality of microcellular injection molded parts / S. C. Chen in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 3 (07/2011)
[article]
Titre : Establishment of gas counter pressure technology and its application to improve the surface quality of microcellular injection molded parts Type de document : texte imprimé Auteurs : S. C. Chen, Auteur ; P. S. Hsu, Auteur ; Y. W. Lin, Auteur Année de publication : 2011 Article en page(s) : p. 275-282 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection microcellulaire
Mousses plastiques
PolystyrèneTags : 'Contre-pression gaz' GCP 'Moulage injection microcellulaire' 'Mousse polystyrène' Index. décimale : 668.4 Plastiques, vinyles Résumé : The purpose of this study is to establish the Gas Counter Pressure (GCP) technology in combined with microcellular injection molding process. The application of gas into the mold cavity during the melt injection period provides a counter force against the melt front advancement, restricting the foaming process during the melt filling stage. Various gas counter pressures from 0 bar up to 300 bar and gas holding times of 0 to 10 s after filling completion were employed for investigating their relevant effect. It was found that when gas counter pressure is greater than 100 bar, foaming does not appear in the skin layer if no holding time is applied after melt-filling. As gas counter pressure increases, thickness of the solid skin layer without foaming also increases. Employment of holding time after melt-filling also assists foaming restriction in the melt core area. If a holding time of 10 s is applied combined with a counter pressure greater than 100 bar, foaming is completely restricted resulting in a transparent PS sample part. The part surface of those subjected to foaming-restriction in the skin layer also appears to be smooth and glossy. For the black PS parts molded via microcellular injection combined with gas counter pressure, it appears the same gloss quality as that achieved by conventional injection molding. DOI : 10.3139/217.2437 En ligne : https://drive.google.com/file/d/1n3HgCjklMlvMNw-m-OWePLgATkWTSzfG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12406
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 3 (07/2011) . - p. 275-282[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013159 - Périodique Bibliothèque principale Documentaires Disponible Predictive property adjustments / Christian Schade in KUNSTSTOFFE INTERNATIONAL, Vol. 100, N° 7 (07/2010)
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Titre : Predictive property adjustments Type de document : texte imprimé Auteurs : Christian Schade, Auteur Année de publication : 2010 Article en page(s) : p. 36-39 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bouteilles en matières plastiques
Emballages en matières plastiques
Polymères -- Propriétés mécaniques
Polymères dans les industries agro-alimentaires
PolystyrèneTags : 'Emballage plastique' 'Glass-clear general purpose polystyrene' GPPS Thermoformage 'Soufflage de corps creux' 'High-impact HIPS 'Propriétés en étirement' Index. décimale : 668.4 Plastiques, vinyles Résumé : High-impact polystyrene - In order to be able to manufacture, for example, high quality yogurt cups or bottles from highimpact polystyrene with due regard to the demands of the processing techniques used such as thermoforming or injection stretch blow molding, it is necessary to have a precise understanding of the molecular behavior of the standard polymer during stretching. Only then can the material be optimally adjusted to the appropriate processing technique. En ligne : https://www.styrolution.com/portal/documents/10180/27310/Kunststoffe+Internation [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9889
in KUNSTSTOFFE INTERNATIONAL > Vol. 100, N° 7 (07/2010) . - p. 36-39[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012385 - Périodique Bibliothèque principale Documentaires Disponible