MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202531121439 A) filed by Asansol Engineering College, Asansol, West Bengal, on Dec. 4, 2025, for 'the impact of printing parameters on the mechanical property of parts printed with pla-chitosan composite by fdm 3d printer.'
Inventor(s) include Anish Deb; Dr. Prosenjit Saha; and Dr. Debashis Sarkar.
The application for the patent was published on April 17, under issue no. 16/2026.
According to the abstract released by the Intellectual Property India: "The present invention The present study investigates the fabrication and mechanical characterization of Fused Deposition Modeling (FDM) parts made from PLA and PLA-chitosan composites with chitosan content up to 2 wt.%. Tensile specimens were produced using an open-source Prusa MK3 3D printer with a 0.4 mm nozzle and 1.75 mm PLA filament, while Simplify3D software was used for slicing and G-code generation. A modified ASTM D638 geometry was adopted to ensure fracture at the minimum cross-section and reduce stress concentrations. Tensile testing was conducted using an electromechanical universal testing machine, with three replicates per experimental run to ensure repeatability. The study emphasizes the influence of FDM process parameters on ultimate tensile strength (UTS), the most critical property for brittle polymers such as PLA. Three main control factors were considered: layer thickness, infill orientation, and number of shell perimeters, while other parameters such as deposition speed, infill density, and printing temperature were held constant. To systematically model and optimize the process, a Central Composite Design (CCD) within the framework of Response Surface Methodology (RSM) was employed. A quadratic regression model was developed to capture the linear, interaction, and quadratic effects of the selected factors, with six center points included for reliable estimation of experimental error. The proposed methodology provides an efficient and statistically robust framework to predict and optimize the tensile strength of additively manufactured biopolymer composites. The integration of PLA-chitosan composites with optimized printing parameters offers potential for sustainable, biodegradable, and mechanically reliable components, suitable for engineering and biomedical applications."
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