Polyamide Resin Composition for 3D Printing with Cellulose Fiber Reinforcement
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Solution Overview
Problem
Fused deposition modeling 3D printers using polylactic acid (PLA) or acrylonitrile-butadiene-styrene copolymer (ABS) resin face issues with warpage and low heat-resisting properties, and polyamide-based resin compositions with cellulose nanofibers suffer from uneven dispersion leading to size changes and distortion due to water absorption.
Innovation Solution
A resin composition containing cellulose fibers in polyamide, specifically polycaproamide (Polyamide 6) or its mixtures with Polyamide 66, 11, or 12, with cellulose fibers having an average diameter of 10 μm or less, is used without a dispersant to ensure uniform dispersion and improved heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If PLA or ABS resin is used as shaping material, then low cost and ease of operation are achieved, but warpage and low heat-resisting properties occur
Solution Approach 1:
The patent uses polyamide as a base resin and incorporates cellulose fibers as reinforcement to create a composite material. This composite structure provides both the ease of operation needed for 3D printing and the high heat-resisting properties required for reliable shaped objects, resolving the contradiction between operational ease and heat resistance
2Reliability
If cellulose nanofibers are added to polyamide to improve heat resistance, then heat-resisting properties are enhanced, but uneven dispersion causes size changes and distortion
Solution Approach 1:
The patent specifies that cellulose fibers should have an average fiber diameter of 10 μm or less. This parameter control ensures uniform dispersion of fibers in the polyamide matrix, preventing size changes and distortion while maintaining heat-resisting properties, thus resolving the contradiction between heat resistance and manufacturing precision
3Stability of the object's composition
If dispersant is added to improve cellulose fiber dispersion, then dispersion uniformity is enhanced, but dispersant bleed out and figure distortion occur
Solution Approach 1:
The patent removes the dispersant component from the formulation entirely. By achieving uniform dispersion of cellulose fibers in polyamide through fiber diameter control and processing conditions without any dispersant, the harmful effect of dispersant bleed out is eliminated while maintaining dispersion uniformity, resolving the contradiction between composition stability and harmful factors
4Ease of manufacture
If cellulose fibers are not uniformly dispersed in polyamide, then ease of manufacture is maintained, but size changes due to water absorption occur
Solution Approach 1:
The patent controls the fiber diameter parameter to 10 μm or less, which enables uniform dispersion of cellulose fibers in polyamide. This uniform dispersion prevents size changes due to water absorption while maintaining ease of manufacture through straightforward processing, resolving the contradiction between ease of manufacture and manufacturing precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a resin composition with high heat-resisting properties, minimal warpage, and size stability, enabling precise shaping and reduced water absorption effects, along with excellent adhesive properties between layers.
Implementation Method 1
adding cellulose fibers during polymerization into a polyamide
Implementation Method 2
a fused deposition modeling method has been employed
Data Source
AI summary
The present invention provides a resin composition having high heat-resisting properties, with which a shaping can be performed in accordance with designed sizes using a fused deposition modeling method-3D printer, and from which a shaped object having a small warpage and small changes in sizes due to water can be obtained. The present invention relates to a resin composition for a shaping material of a fused deposition modeling method-3D printer, comprising cellulose fibers in a polyamide.