THE INFLUENCE OF THE PHYSICAL-MECHANICAL PROPERTIES ON INSTALLATION TECHNIQUES OF EVA MONOLAYER FILMS FOR GREENHOUSES The large diffusion of the greenhouse plastic films has aroused a growing interest in their physical-mechanical properties. The fitting up of the film requires the knowledge of the mechanical properties in order to avoid permanent set of the film caused by the overcoming of the tensile strength at yield especially in the EVA monolayer films. The radiometric properties have been evaluated by means of spectrometers in the range 200-25000 nm and the mechanical properties by tensile tests. The results have permitted to define the different mechanical and radiometric properties of several EVA monolayer films in order to give correct fitting up instructions and then to avoid problems to the growers.
THE INFLUENCE OF THE PHYSICAL-MECHANICAL PROPERTIES ON INSTALLATION TECHNIQUES OF EVA MONOLAYER FILMS FOR GREENHOUSES The large diffusion of the greenhouse plastic films has aroused a growing interest in their physical -mechanical properties The fitting up of the film requires the knowledge of the mechanical properties in order to avoid permanent set of the film caused by the overcoming of the tensile strength at yield especially in the EVA monolayer films. The radiometric properties have been evaluated by means of spectrometers in the range 200-25000 nm and the mechanical properties by tensile tests. The results have permitted to define the different mechanical and radiometric properties of several EVA monolayer films in order to give correct fitting up instructions and then to avoid problems to the growers.
I numerosi film plastici per serre attualmente disponibili sul mercato non sono generalmente corredati da una sufficiente documentazione tecnica relativa alle qualità meccaniche e radiometriche dei film per poter operare una scelta e una valutazione di redditività. La conoscenza delle principali caratteristiche mecca-niche e’ peraltro indispensabile per una messa in opera adeguata, in modo the il film venga tesato con valori di tensione sufficientemente inferiori al limite di elasticita’, evitando possibili fenomeni di cedimento sotto I carichi accidentali. Alla scopo di approfondire le caratteristiche fisiche dei film di EVA, sono state provate in laboratorio 3 differenti qualita’ di EVA monostrato mediante prove radiometriche nel range 200-25000 nm e prove di resistenza a trazione, rilevando il carico di snervamento, la resistenza massima e l'allungamento percentuale a rottura. I risultati hanno consentito di approfondire il comportamento dei film sotto carico e formulare opportune indicazioni per uri corretto montaggio ed impiego, in modo da poter conseguentemente garantire un idoneo utilizzo del materiale ed evitare danni ed inconvenienti ai serricoltori.
L’influenza delle caratteristiche fisiche sulle tecniche di montaggio di film di EVA per serre / SCARASCIA MUGNOZZA, Giacomo; Picuno, P.; Vox, Giuliano. - In: SCIENZA E TECNICA AGRARIA. - ISSN 0036-8881. - STAMPA. - 34 (3-4):(1994), pp. 11-22.
L’influenza delle caratteristiche fisiche sulle tecniche di montaggio di film di EVA per serre
SCARASCIA MUGNOZZA, Giacomo;
1994-01-01
Abstract
THE INFLUENCE OF THE PHYSICAL-MECHANICAL PROPERTIES ON INSTALLATION TECHNIQUES OF EVA MONOLAYER FILMS FOR GREENHOUSES The large diffusion of the greenhouse plastic films has aroused a growing interest in their physical -mechanical properties The fitting up of the film requires the knowledge of the mechanical properties in order to avoid permanent set of the film caused by the overcoming of the tensile strength at yield especially in the EVA monolayer films. The radiometric properties have been evaluated by means of spectrometers in the range 200-25000 nm and the mechanical properties by tensile tests. The results have permitted to define the different mechanical and radiometric properties of several EVA monolayer films in order to give correct fitting up instructions and then to avoid problems to the growers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
