| Titre : |
Monitoring of injection molding tool corrosion and effects of wood plastic compound's moisture on material properties |
| Type de document : |
texte imprimé |
| Auteurs : |
E. Steidl, Auteur ; L. Sobczak, Auteur ; C. Pretschuh |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 66-75 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Bois
Composites à fibres -- Effet de l'humidité
Composites à fibres végétales
Composites à fibres végétales -- Moulage par injection
Composites à fibres végétales -- Propriétés mécaniques
Corrosion
Essais accélérés (technologie)
Polypropylène
Réaction de couplage
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Before injection molding, wood polymer composites (WPC) normally have to be dried to achieve optimal quality of the injected parts as well as to avoid corrosion of the mold. Based on a literature study, there are currently no published investigations dealing with the dependency of WPC properties on the initial moisture content of the compound's pellets. Further, it is known that water and wood in combination with high temperatures can lead to corrosion of steel parts, but a systematic analysis of the impact of WPC injection molding on tool corrosion has not been found in the literature. For the present study, a compound with 68 wt% (weight percent) polypropylene, 30 wt% wood flour and 2 wt% coupling agent was produced and tested in injection molding trials. Specimens according to ISO 527-2 were produced from WPC with defined moisture contents, respectively. Compound moisture, already at very low contents, had significant negative effects on the tested mechanical properties, namely tensile modulus and strength, unnotched and notched Charpy impact strength and heat deflection temperature. Corrosion trials were performed for different tool steel qualities. The severity of corrosion correlates with the amount of chromium (Cr) in the alloys tested. |
| Note de contenu : |
- THEORETICAL BACKGROUND : Influence of compound moisture on injection molded parts - Decomposition of wood components and their impact on the injection molding equipment - Types of corrosion and important alloying elements of tool steels
- EXPERIMENTAL PROCEDURE : Materials and formulation - Compounding, injection molding and corrosion testing - Characterization methods
- RESULTS : Corrosion tests - The effect of moisture content on WPC properties |
| DOI : |
10.3139/217.3382 |
| En ligne : |
https://drive.google.com/file/d/1ZXpv4yFP8xFh7LwvzMJEg5eqfHLD8GJu/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30171 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 1 (03/2018) . - p. 66-75
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