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PETG (polyethylene terephthalate glycol) wire material for fused deposition molding and preparation method of wire material
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A fused deposition molding and wire technology, applied in the direction of additive processing, can solve problems such as insufficient toughness, and achieve the effect of improving impact strength and expanding applications
Inactive Publication Date: 2017-09-19
GUANGDONG SILVER AGE SCI & TECH CO LTD
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Problems solved by technology
[0006] The present invention provides a PETG wire used for fused deposition molding, and also provides its preparation method, using thermoplastic elastomers and inorganic rigid nanoparticles to synergistically modify PETG to overcome the lack of toughness of existing PETG wires that cannot be used in The defects of FDM are suitable for rapid prototyping of parts with complex shapes and excellent mechanical properties, as well as improving the dimensional accuracy of parts
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Embodiment 1
[0032] Embodiment 1: comprise the following steps:
[0033] (1) Drying step: put the PETG powder in an air circulation oven and dry it for 6 hours at a temperature of 65° C., and set it aside;
[0034] (2) Surface modification step: mix inorganic rigid particles with surface modifier and ethanol at a weight ratio of 1:2%:10, and after ultrasonic dispersion for 10 minutes, stir at 60°C for 2 hours, cool, filter, and wash 1. After drying at a temperature of 100°C, surface-modified inorganic rigid nanoparticles are obtained; the ethanol concentration is 90%;
[0035] (3) Mixing step: adding thermoplastic elastomer, antioxidant, lubricant and dry PETG powder obtained in step (1), surface-modified inorganic rigid nanoparticles into a mixer and mixing evenly to obtain a premix;
[0046] Embodiment 2: comprise the following steps:
[0047] (1) Drying step: put the PETG powder in an air circulation oven and dry it for 6 hours at a temperature of 65° C., and set it aside;
[0048] (2) Surface modification step: mix inorganic rigid particles with surface modifier and ethanol at a weight ratio of 1:2%:10, and after ultrasonic dispersion for 10 minutes, stir at 60°C for 2 hours, cool, filter, and wash 1. After drying at a temperature of 120°C, surface-modified inorganic rigid nanoparticles are obtained; the ethanol concentration is 95%;
[0049] (3) Mixing step: adding thermoplastic elastomer, antioxidant, lubricant and dry PETG powder obtained in step (1), surface-modified inorganic rigid nanoparticles into a mixer and mixing evenly to obtain a premix;
[0050] The components by mass percentage are: PETG 94%, thermoplastic elastomer 5%, surface-modified inorganic rigid nanoparticles 0.2%, antioxidant 0.3%, lubricant 0..5%;
[0051] (4) Melting and granula...
Embodiment 3
[0060] Embodiment 3: comprise the following steps:
[0061] (1) Drying step: put the PETG powder in an air circulation oven and dry it at 68°C for 5 hours, and set it aside;
[0062] (2) Surface modification step: according to the weight ratio of 1:2.5%:15, mix the inorganic rigid particles with the surface modifier and ethanol, and after ultrasonic dispersion for 20 minutes, stir at 65°C for 1 hour, cool, filter, and wash 1. After drying at a temperature of 120°C, surface-modified inorganic rigid nanoparticles are obtained; the ethanol concentration is 95%;
[0063] (3) Mixing step: adding thermoplastic elastomer, antioxidant, lubricant and dry PETG powder obtained in step (1), surface-modified inorganic rigid nanoparticles into a mixer and mixing evenly to obtain a premix;
[0064] The components by mass percentage are: PETG 95%, thermoplastic elastomer 4%, surface-modified inorganic rigid nanoparticles 0.5%, antioxidant 0.4%, lubricant 0.1%;
[0065] (4) Melting and granu...
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Abstract
The invention discloses a PETG (polyethylene terephthalate glycol) wire material for fused deposition molding and a preparation method of the wire material, belongs to fused deposition molding materials and a preparation method thereof, and solves the problem of insufficient toughness of an existing PETG wire material. The wire material comprises, in weight percentage, 92%-99% of PETG, 0-5% of thermoplastic elastomers, 0.1%-1% of surface modified inorganic rigid nano-particles, 0.1%-0.5% of antioxidants and 0.1%-1.5% of lubricating agents. The preparation method includes the steps: drying; surface modification; mixing; melting granulating; extruding wiredrawing; preparing modified toughening PETG wire materials applicable to FDM (fused deposition molding) techniques. The thermoplastic elastomers and the inorganic rigid particles serve as toughening agents, so that the PETG material is toughened, toughness, impact strength and elongation at break of the PETG material are improved, movement of molecular chains can be limited by uniformly-distributed inorganic rigid particles, state changes of PETG resins in the sintering process are decreased, so that the dimensional accuracy of sintered parts is improved, and the sintered parts are applicable to the FDM techniques.
Description
technical field [0001] The invention belongs to a fused deposition molding material and a preparation method thereof, in particular to a PETG wire used for fused deposition molding and a preparation method thereof. Background technique [0002] Fused Deposition Modeling (Fused Deposition Modeling, FDM), also known as fused filament deposition, is an additive manufacturing (also known as 3D printing) technology. FDM fusion lamination molding technology is to heat and melt the filamentous hot-melt material, and at the same time, under the control of the computer, the three-dimensional nozzle selectively coats the material on the workbench according to the cross-sectional profile information, and forms a layer after rapid cooling. section. After one layer of molding is completed, the machine table is lowered to a height (that is, the thickness of the layer) and then the next layer is formed until the entire solid shape is formed. The FDM processing process is smooth, and ther...
Claims
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Application Information
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