1,720,974 research outputs found
Apparecchiatura perfezionata per la generazione di plasma e processo per il trattamento di materiali tessili o polimerici impiegante la stessa
No full text
APPARECCHIATURA A FLUSSO VORTICOSO PER REALIZZARE UN'INTERAZIONE TRA UN FLUIDO ED UN SOLIDO E PROCESSO DI INTERAZIONE FLUIDO-SOLIDO IMPIEGANTE LA STESSA
No full textAtmospheric plasma treatment to improve durability of a water and oil repellent finishing for acrylic fabrics
No full text
Process diagnostics in atmospheric continuous plasma equipment for fabric and polymeric film treatment
No full textAn equipment for atmospheric continuous treatment applicable to various textile materials was investigated to characterize its thermal, energetic, hydrodynamic and chemical features. The main characteristic of this prototype is provided by the peculiar fashion of contacting the fabric by the gaseous plasma blade jet. The operative variables of the process are gas flow rate and composition, electrical power to the plasma generator, fabric velocity, distance from gas inlet to accommodate different textile structures, as well as the impact gas-to-fabric angle. The diagnostics on the equipment was carried out to improve the plasma treatment homogeneity and generate an effective feedback analysis to the prototype manufacturer. The gas inlet was characterized in terms of thermal and gas velocity transversal profiles; in addition, the residual oxygen concentration was measured along the fabric motion direction and with a stimulus/response dynamic technique, i.e. after commuting the gas feed from air to pure nitrogen at several flow rates. The fabric itself was monitored by six infrared sensors downstream of the gaseous plasma contact. Besides the local property profiles, the comprehensive effect of the energy transferred to the moving substrate was evaluated by the blackening intensity on a thermal paper by reflection spectrophotometry. All these measurements have shown that the prototype definitely requires substantial improvements as far as the gas distribution is concerned to fully demonstrate its excellent potentiality to in-line functionalize textile substrates; further operative variables can also be controlled in a second release of this prototype
Atmospheric continuous plasma treatment on textile: property improvement in finishing and dyeing
No full textThe effect of an innovative atmospheric plasma jet treatment on physical and mechanical properties of wool fabrics
No full textThis work concerns the study of some important physical and mechanical properties of a wool fabric treated with a roll-to-roll atmospheric plasma jet equipment. The plasma pilot unit, based on a postdischarge technology, was equipped with an innovative plasma-to-fabric contactor, which promotes a relevant penetration of plasma through the fabric structure and geometrically defines the atmosphere. Wool fabrics were processed at three different velocities (1, 3 and 6 m/min); the other process variables were kept constant. Tensile strength, elongation at break, surface thickness, wettability and air permeability increased after the plasma treatment, while several low-stress mechanical properties, strictly related to the handle, were not modified. SEM analysis was also carried out to better interpret the above macroscopic results
Atmospheric continuous plasma treatment: thermal and hydrodynamical experimental diagnostic
No full text
- …
