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Abstract
Abstract
Cast film extrusion allows producing technical polymer films for packaging and coating applications. Different kinds of defects may be observed. For packaging applications, the challenge is to obtain very thin films in stable conditions at the highest throughput. For coating applications, the challenge is to master the film width reduction (called neck-in) and the induced non-uniform film thickness (called dog-bone defect). Well instrumented experiments point out the influence of the polymer and of the processing conditions on the occurrence of these defects. Numerical models of increasing complexity allow capturing the main experimental features and this makes possible to propose technological solutions to delay or even to suppress defects occurrence.
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Affiliation(s)
- Y. Demay
- Univ. Côte d’Azur, Lab. J. A. Dieudonné, UMR CNRS 7351 , Nice , France
| | - J. F. Agassant
- MINES Paristech, PSL Research University, CEMEF, UMR CNRS 7635, Sophia-Antipolis , Valbonne , France
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2
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Rokade D, Azad LB, Poddar S, Mishra S, Pol HV, Shukla R. Controlling Necking in Extrusion Film Casting Using Polymer Nanocomposites. J MACROMOL SCI B 2017. [DOI: 10.1080/00222348.2017.1289797] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Dhammaraj Rokade
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune, India
| | - Lal B. Azad
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune, India
| | - Suparna Poddar
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune, India
| | - Satyendra Mishra
- University Institute of Chemical Technology, North Maharashtra University, Jalgaon, India
| | - Harshawardhan V. Pol
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune, India
| | - Rishab Shukla
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune, India
- University Institute of Chemical Technology, North Maharashtra University, Jalgaon, India
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3
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Pol HV, Thete SS. Necking in Extrusion Film Casting: Numerical Predictions of the Maxwell Model and Comparison with Experiments. J MACROMOL SCI B 2016. [DOI: 10.1080/00222348.2016.1225556] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Rhoades AM, Wonderling N, Gohn A, Williams J, Mileva D, Gahleitner M, Androsch R. Effect of cooling rate on crystal polymorphism in beta-nucleated isotactic polypropylene as revealed by a combined WAXS/FSC analysis. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.02.047] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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5
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Eghtesadi Z, McAuley KB. Mean-squared-error-based method for parameter ranking and selection with noninvertible fisher information matrix. AIChE J 2015. [DOI: 10.1002/aic.15096] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zahra Eghtesadi
- Dept. of Chemical Engineering; Queen's University; Kingston ON K7L 3N6 Canada
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6
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Cocca M, Androsch R, Righetti MC, Malinconico M, Di Lorenzo ML. Conformationally disordered crystals and their influence on material properties: The cases of isotactic polypropylene, isotactic poly(1-butene), and poly(l-lactic acid). J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.02.038] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Sreenivas K, Pol HV, Kumaraswamy G. The influence of DMDBS on the morphology and mechanical properties of polypropylene cast films. POLYM ENG SCI 2014. [DOI: 10.1002/pen.21957] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Abstract
Abstract
Cast film extrusion is a widely used technique to produce polymer films for packaging or coating applications. The final width of the film may be smaller than the initial die width (necking phenomenon) and therefore is the final film thickness larger than what one could expect. Moreover it is heterogeneous (in terms of showing a larger thickness along the borders, also called dog bone defect). Above a critical draw ratio between the chill roll and the die both width and thickness fluctuations are observed (Draw Resonance Instability). All these phenomena limit the productivity of the process.
This paper provides an overview of the processing and material parameters governing the development of these geometrical defects and instabilities. Numerical models capturing the main experimental features are proposed, allowing to investigate process modifications in order to limit the development of these defects.
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Affiliation(s)
- J. F. Agassant
- Ecole des Mines de Paris, Centre de Mise en Forme des Matériaux, Sophia Antipolis, France
| | - Y. Demay
- Ecole des Mines de Paris, Centre de Mise en Forme des Matériaux, Sophia Antipolis, France
| | - C. Sollogoub
- Ecole des Mines de Paris, Centre de Mise en Forme des Matériaux, Sophia Antipolis, France
| | - D. Silagy
- Ecole des Mines de Paris, Centre de Mise en Forme des Matériaux, Sophia Antipolis, France
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10
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Lamberti G. Flow-induced crystallization during isotactic polypropylene film casting. POLYM ENG SCI 2011. [DOI: 10.1002/pen.21891] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Composition-dependent curing behavior and peel strength of epoxy resins for printed circuit boards (PCBs). Macromol Res 2010. [DOI: 10.1007/s13233-009-0095-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Aniunoh K, Harrison GM. The processing of polypropylene cast films. I. Impact of material properties and processing conditions on film formation. POLYM ENG SCI 2009. [DOI: 10.1002/pen.21637] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hallmark B. The experimental observation and numerical modeling of cast film deformation using novel capillary markers. POLYM ENG SCI 2007. [DOI: 10.1002/pen.20822] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Lamberti G, Titomanlio G. Analysis of Film Casting Process: Effect of Cooling during the Path in Air. Ind Eng Chem Res 2005. [DOI: 10.1021/ie050899z] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gaetano Lamberti
- Department of Chemical and Food Engineering, University of Salerno, Via Ponte don Melillo, 84084 Fisciano (SA), Italy
| | - Giuseppe Titomanlio
- Department of Chemical and Food Engineering, University of Salerno, Via Ponte don Melillo, 84084 Fisciano (SA), Italy
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Lamberti G, Brucato V. Real-time orientation and crystallinity measurements during the isotactic polypropylene film-casting process. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/polb.10411] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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