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Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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Fused Deposition Modelling (FDM) of Thermoplastic-Based Filaments: Process and Rheological Properties-An Overview.

Domenico Acierno1, Antonella Patti2

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Materials (Basel, Switzerland)
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Summary

Fused Deposition Modeling (FDM) utilizes material viscoelastic properties for successful 3D printing. Understanding rheology is key to predicting thermoplastic performance in FDM processes.

Keywords:
bucklingflow instabilityfused deposition modelling (FDM)pressure-driven extrusionrheological propertiesthermoplasticswelding

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Area of Science:

  • Materials Science
  • Manufacturing Engineering
  • Polymer Science

Background:

  • Fused Deposition Modeling (FDM) is an extrusion-based 3D printing technology for creating complex geometries.
  • FDM is utilized across automotive, biomedical, and textile industries for rapid prototyping and high-precision part manufacturing.
  • The process involves material feeding, capillary flow, layer deposition, and adhesion, with material viscoelasticity being crucial at each stage.

Purpose of the Study:

  • To consolidate knowledge on FDM extrusion processes.
  • To review various rheological properties relevant to FDM.
  • To establish a framework for predicting thermoplastic performance in FDM based on rheological data.

Main Methods:

  • Literature review of FDM processes and material science.
  • Analysis of rheological properties and their impact on FDM.
  • Correlation of viscoelastic characteristics with printability, deposition, and adhesion.

Main Results:

  • Viscoelastic properties are critical for successful FDM, influencing melt flow, deposition accuracy, and layer bonding.
  • Material rheology directly impacts printability, preventing nozzle clogging and ensuring continuous extrusion.
  • Understanding rheological behavior is essential for controlling filament deposition and achieving desired part precision and integrity.

Conclusions:

  • Accurate characterization of thermoplastic rheology is vital for optimizing FDM processes.
  • Rheological data enables prediction and control of material behavior during FDM.
  • This knowledge facilitates the development of new materials and improved FDM applications.