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Main Title: Piezo-Plunger Jetting Technology: An Experimental Study on Jetting Characteristics of Filled Epoxy Polymers
Author(s): Kurz, Alexander
Bauer, Jörg
Wagner, Manfred
Type: Article
Language Code: en
Abstract: The droplet formation of Newtonian fluids and suspensions modified by spherical, non-colloidal particles has attracted much interest in practical and theoretical research. For the present study, a jetting technique was used which accelerates a geometrically defined plunger by a piezoelectric actuator. Changing rheological properties of materials and extending deformation rates towards nonlinear viscoelastic regimes created the requirement to extend dosage impulses towards larger magnitudes. To mimic the rheological characteristics of nonconductive adhesives we modified Newtonian epoxy resins by thixotropic additives and micro-scale glass spheres. Rheological analysis at steady shear and oscillatory shear ensured a differentiation between material and process-related factors. Evaluation of high-speed images allowed the investigation of drop dynamics and highlighted the dispense impulse reduction by material-specific dampening properties.
Issue Date: 1-Feb-2019
Date Available: 22-Aug-2019
DDC Class: 530 Physik
Subject(s): complex fluids
drop formation
polymer processing
Journal Title: Fluids
Publisher: MDPI
Publisher Place: Basel
Volume: 4
Issue: 1
Article Number: 23
Publisher DOI: 10.3390/fluids4010023
EISSN: 2311-5521
Appears in Collections:FG Polymertechnik und Polymerphysik » Publications

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