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Optimization of Produced Parameters for PA6/PA6GF30 Composite Produced by 3D Printing with Novel Knitting Method
Selim Hartomacıoğlu1,2, Mustafa Oksuz2,3, Aysun Ekinci4,5
1Department of Mechanical Engineering, Faculty of Technology, Marmara University, 34854 Istanbul, Turkey.
Polymers
|June 27, 2025
Summary
A novel knitting technique enhances fused deposition modeling (FDM) for producing polyamide 6 (PA6) and glass fiber-reinforced PA6 (PA6GF30) composites. This method optimizes mechanical properties, achieving high tensile strength and impact resistance.
Area of Science:
- Materials Science
- Polymer Engineering
- Additive Manufacturing
Background:
- Additive manufacturing offers alternatives to traditional mass production in the polymer composite industry.
- Direction-dependent properties and high costs of fiber-reinforced polymers necessitate exploring new materials and production methods.
Purpose of the Study:
- Investigate a special geometric-shaped knitting technique for producing multi-material composites using fused deposition modeling (FDM).
- Optimize process parameters to enhance the mechanical behavior of polyamide 6 (PA6)/PA6GF30 composites.
Main Methods:
- Utilized fused deposition modeling (FDM) with polyamide 6 (PA6) and polyamide 6 with 30 wt.% glass fiber (PA6GF30).
- Employed Taguchi design (L9 fractional experiment) to study process parameters: geometric shape, layer thickness, nozzle temperature, and post-heat treatment.
- Conducted tensile and impact tests, alongside scanning electron microscopy (SEM) for mechanical behavior and damage analysis.
- Applied grey relational analysis (GRA) to determine optimal experimental conditions.
Main Results:
- The highest tensile strength achieved was 89.89 MPa for PA6GF30 composites with the special geometric shape.
- The maximum impact resistance value reached 83 kJ/m² for the PA6/PA6GF30 composite.
- Optimal experimental conditions were identified and plotted using GRA.
Conclusions:
- The developed knitting method offers significant advantages for FDM-based composite production.
- Successfully produced PA6/PA6GF30 composites with enhanced mechanical properties using the novel technique.
