3D printing ABS material and preparation method thereof

Abstract

The invention discloses a 3D printing ABS material and a preparation method thereof, and relates to the technical field of 3D printing materials. The preparation method of the 3D printing ABS material comprises the following steps: S1, uniformly mixing ABS, PS-g-MAH, an interlayer bonding accelerator, ABS modified glass fibers, an antioxidant, a bright dispersant and an epoxy silane coupling agent to obtain a mixed material; s2, carrying out melt extrusion on the mixed material, and cooling to obtain the 3D printing ABS material, wherein the ABS comprises conventional ABS and modified ABS in a mass ratio of 1: (0-1.2). The 3D printing ABS material with excellent thermal stability, moisture resistance, forming stability and interlayer interface bonding is comprehensively prepared under the synergistic effect of various components such as modified ABS, an interlayer PS accelerant and ABS modified glass fibers.

Description

Technical Field

[0001] This invention relates to the field of 3D printing materials technology, specifically a 3D printing ABS material and its preparation method. Background Technology

[0002] ABS (acrylonitrile-butadiene-styrene copolymer) has become one of the most widely used materials in the field of 3D printing due to its good mechanical properties, impact resistance, and processing fluidity. However, traditional ABS materials still have several significant drawbacks in actual 3D printing processes: First, ABS is relatively sensitive to humidity, easily absorbing moisture, which leads to air bubbles and reduced interlayer bonding during printing, thus affecting the mechanical properties and dimensional stability of the product; second, when ABS is stacked layer by layer, the interfacial bonding strength between layers is often insufficient, easily causing delamination and peeling, which restricts its application in load-bearing components or high-precision scenarios; in addition, ABS has relatively limited thermal stability, and problems such as thermal degradation and warping deformation may occur during repeated heating, extrusion, and cooling, affecting printing accuracy and yield.

[0003] Therefore, in order to overcome the shortcomings of the aforementioned ABS materials, this invention will provide an ABS material with excellent comprehensive performance that is suitable for high-requirement 3D printing scenarios, which is of great significance. Summary of the Invention

[0004] The purpose of this invention is to provide a 3D printed ABS material and its preparation method to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A method for preparing 3D printed ABS material includes the following steps: S1: Add the dried ABS, PS-g-MAH, interlayer bonding accelerator, ABS modified glass fiber, antioxidant, brightening dispersant, and epoxy silane coupling agent to a mixer and stir thoroughly to obtain a mixture. S2: The mixture is added to a twin-screw extruder, melt-extruded, and cooled to obtain 3D printed ABS material.

[0006] Furthermore, the 3D printed ABS material comprises the following raw material components in parts by weight: 65-75 parts ABS, 25-35 parts PS-g-MAH, 10-15 parts interlayer bonding promoter, 10-20 parts ABS modified glass fiber, 0.1-0.5 parts antioxidant, 0.1-1 part gloss dispersant, and 0.1-0.5 parts epoxy silane coupling agent.

[0007] Furthermore, the relevant operating parameters of the twin-screw extruder for preparing 3D printed ABS materials are as follows: including 8 temperature zones, with the temperature range of zones 1 to 8 being 180~210℃; the die head temperature being 200~205℃; the main extruder speed being 100~200rpm; and the feeding speed being 10~30rpm.

[0008] Furthermore, the ABS includes conventional ABS and modified ABS with a mass ratio of 1:(0~1.2).

[0009] Further, the preparation method of the modified ABS is as follows: (1) add conventional ABS, fluorinated acrylate, antioxidant and dicumyl peroxide into a mixer and stir thoroughly; (2) add the mixture obtained in (1) into a twin-screw extruder, melt extrude, cool, and obtain modified ABS.

[0010] Furthermore, the modified ABS comprises the following raw material components in parts by weight: 75-85 parts of conventional ABS, 2-8 parts of fluorinated acrylate, 0.1-0.3 parts of dicumyl peroxide, and 0.1-0.3 parts of antioxidant.

[0011] Furthermore, the fluorinated acrylates include, but are not limited to, one or more combinations of trifluoroethyl acrylate, 2,2,3,3-tetrafluoropropyl acrylate, 2,2,3,3-tetrafluoropropyl methacrylate, 2,2,3,3,3-pentafluoropropyl acrylate, (2H-perfluoropropyl)-2-acrylate, and 2,2,3,4,4,4-hexafluorobutyl acrylate.

[0012] Furthermore, the relevant operating parameters of the twin-screw extruder for preparing modified ABS are as follows: including 8 temperature zones, with the temperature range of zones 1 to 8 being 185 to 225°C; the die head temperature being 215 to 220°C; the main extruder speed being 200 to 300 rpm; and the feed speed being 50 to 80 rpm.

[0013] Further, the preparation method of the interlayer bonding accelerator is as follows: (1) Add the dried ABS-g-MAH, PA-66, SEBS-g-MAH and antioxidant into a mixer and stir thoroughly; (2) Add the mixture obtained in (1) into a twin-screw extruder, melt extrude, cool, and obtain the interlayer bonding accelerator.

[0014] Furthermore, the interlayer bonding promoter comprises the following raw material components in parts by weight: 10-15 parts of ABS-g-MAH, 2.5-5 parts of PA-66, 5-10 parts of SEBS-g-MAH, and 0.1-0.3 parts of antioxidant.

[0015] Furthermore, the relevant operating parameters of the twin-screw extruder for preparing the interlayer bonding accelerator are as follows: divided into 8 temperature zones, with the temperature range of zones 1 to 8 being 240~265℃; the die head temperature being 250~260℃; the main extruder speed being 200~300rpm; and the feed speed being 50~80rpm.

[0016] Further, the preparation method of the ABS modified glass fiber is as follows: (1) Add aminosilane coupling agent to 70~80wt% ethanol aqueous solution, adjust pH to 5~5.5, stir and mix for 20~40min to obtain aminosilane hydrolysate; (2) Add glass fiber to aminosilane hydrolysate for soaking treatment for 1~3h, filter, wash and vacuum dry to obtain amino modified glass fiber; (3) Add ABS-g-MAH and amino modified glass fiber to N,N-dimethylformamide, ultrasonically disperse for 10~30min, stir and react at 120~140℃ for 12~24h, filter, wash and vacuum dry to obtain ABS modified glass fiber.

[0017] Furthermore, the volume ratio of the aminosilane coupling agent and the aqueous ethanol solution is (0.05~0.1):1.

[0018] Furthermore, the ratio of glass fiber to aminosilane coupling agent is (1~2)g:(5~10)mL.

[0019] Furthermore, the glass fiber has a diameter of 8~16μm and a length of 2~6mm.

[0020] Furthermore, the aminosilane coupling agent includes, but is not limited to, one or more combinations of 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, and 3-aminopropylmethyldimethoxysilane.

[0021] Furthermore, the ABS modified glass fiber comprises the following raw material components in parts by weight: 3-6 parts of ABS-g-MAH, 20-25 parts of amino modified glass fiber, and 80-100 parts of N,N-dimethylformamide.

[0022] Furthermore, in this invention, the grafting rate of maleic anhydride in the ABS-g-MAH is 0.8~1.5wt%; the grafting rate of maleic anhydride in the SEBS-g-MAH is 0.8~1.5wt%.

[0023] Furthermore, the bright dispersant includes, but is not limited to, one or more combinations of TAS-2A, ethylene bis-stearamide, and white oil.

[0024] Furthermore, in this invention, the antioxidants are all obtained by mixing and compounding antioxidant 1076 and antioxidant 168 in a mass ratio of (1~2):(1~2).

[0025] Furthermore, the epoxy silane coupling agent includes, but is not limited to, one or more combinations of 3-glycidyl etheroxypropyltrimethoxysilane, 3-glycidyl etheroxypropyltriethoxysilane, 3-glycidyl etheroxypropylmethyldimethoxysilane, and 3-glycidyl etheroxypropylmethyldiethoxysilane.

[0026] Furthermore, a 3D printed ABS material is prepared by the preparation method described above.

[0027] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) This invention uses ABS as the matrix and adds a high proportion of PS-g-MAH as a compatibilizer and modifier. It has excellent compatibility with ABS and can be uniformly dispersed in ABS, effectively improving the melt strength and interlayer bonding strength of ABS material, thereby ensuring the formability and molding accuracy of 3D printed products. Antioxidant is also added to the solution. The antioxidant is obtained by mixing and compounding antioxidant 1076 and antioxidant 168. Under the synergistic effect of the two, it can prevent the thermo-oxidative aging of ABS material during melt processing and 3D printing, and ensure the stability of ABS material performance. Bright dispersant promotes resin dispersion and ensures 3D printing quality. Epoxy silane coupling agent can strengthen interlayer bonding.

[0028] (2) Considering that conventional ABS is sensitive to humidity and easily absorbs moisture, leading to a significant decrease in mechanical and other properties, this invention uses melt grafting to graft fluorinated acrylate onto ABS to obtain modified ABS containing fluorinated segments. The fluorinated segments in the modified ABS can enhance the moisture resistance of ABS and also improve its thermal stability. Considering that the modified ABS contains fluorinated segments, the introduction of fluorinated segments will also improve the surface lubricity of ABS. If modified ABS is used to completely replace conventional ABS, the interlayer bonding strength of the 3D printed product will eventually decrease significantly, making it very easy for delamination and peeling to occur. Therefore, this solution uses ABS and modified ABS in a mass ratio of 1:(0~1.2) as ABS raw materials. In addition, the introduction of fluorinated segments can also give the ABS material certain flame retardant properties.

[0029] (3) In order to further address the negative impact of fluorinated segments, this invention designs a method to react the anhydride of ABS-g-MAH with the terminal amino group of PA-66 through melt grafting, thereby improving the compatibility of PA-66 in ABS material and uniformly dispersing PA-66 in ABS material. The amide groups on PA-66 segments and the amide groups and nitrile groups on ABS can form a dense cross-linked structure with multiple hydrogen bonds, thereby enhancing the interlayer bonding strength of 3D printed products. At the same time, PA-66 segments can also improve the overall thermal stability of the material. Furthermore, considering the need to add glass fiber to improve the thermal shrinkage of ABS material, and the fact that the introduction of glass fiber increases the overall rigidity of the material, making 3D printed products prone to defects such as brittleness and cracking, the proposed solution considers adding SEBS-g-MAH to participate in the preparation of the interlayer bonding accelerator. The anhydride of SEBS-g-MAH can also react with the terminal amino groups on PA-66 to ultimately prepare an interlayer bonding accelerator containing SEBS segments. SEBS has high flexibility, which can compensate for the rigidity brought by glass fiber. At the same time, SEBS can also form a flexible interface layer between layers, relieving interlayer stress during the 3D printing process, which can effectively improve the molding stability and finished product quality of 3D printed products.

[0030] (4) To improve the molding stability of 3D printed products, this invention further modifies glass fibers with an aminosilane coupling agent, and then reacts them with ABS-g-MAH to obtain ABS-modified glass fibers. The ABS-modified glass fibers have strong interfacial bonding with ABS and are not prone to agglomeration, which can maximize the reinforcing efficiency of glass fibers. When added to the raw material components, it can significantly improve the mechanical properties and thermal stability of 3D printed ABS materials, thereby suppressing problems such as heat recovery and warping during the printing process, and significantly enhancing the precision and mechanical properties of 3D printed products. In addition, the residual amino and hydroxyl groups in the ABS-modified glass fibers can also interact with PS-g-MAH, interlayer bonding promoters, etc., which can also enhance the interfacial bonding strength of 3D printed products. Furthermore, the introduction of glass fibers can also enhance the flame retardant properties of ABS materials.

[0031] (5) In this invention, the epoxy silane coupling agent can further strengthen the interfacial bonding between glass fiber and organic resin, and play an auxiliary role in enhancing the interfacial bonding strength of 3D printed products.

[0032] In summary, through the synergistic effect of modified ABS, PS-g-MAH, interlayer bonding promoter, ABS modified glass fiber, and epoxy silane coupling agent, this invention comprehensively prepares a 3D printing ABS material with excellent thermal stability, moisture resistance, molding stability, and interlayer interface bonding, while also possessing certain flame retardant properties. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that the following quantities are by weight, and there are no special restrictions on the suppliers of all raw materials involved in this invention. Exemplary examples include: In the following examples, ABS681 (model HF-681); ABS-g-MAH (maleic anhydride grafting rate 1 wt%); PA-66 (model AKV15H1.0); PS-g-MAH (maleic anhydride grafting rate 1%); SEBS-g-MAH (maleic anhydride grafting rate 1%); 2,2,3,3-tetrafluoroacrylate (CAS number 7383-71-3); glass fiber (diameter 8~10 μm, length 3~5 mm); and other raw materials were commercially available.

[0035] Preparatory step 1: Antioxidant: Antioxidant 1076 and Antioxidant 168 are mixed and compounded in a mass ratio of 2:1 to obtain an antioxidant.

[0036] Preparatory step 2: Place the ABS, 2,2,3,3-tetrafluoropropyl acrylate, antioxidant, ABS-g-MAH, PA-66, PS-g-MAH, TAS-2A, 3-glycidyl etheroxypropyltriethoxysilane and other components in a vacuum drying oven at 80°C and dry for 4 hours.

[0037] Example 1: A method for preparing 3D printed ABS material: S1: Preparation of modified ABS, interlayer bonding accelerator, and ABS-modified glass fiber: S11: Preparation of modified ABS: (1) Add 80 parts of ABS681, 5 parts of 2,2,3,3-tetrafluoropropyl acrylate, 0.2 parts of antioxidant, and 0.2 parts of dicumyl peroxide to a mixer and stir thoroughly to obtain a mixture; (2) Add the mixture obtained in (1) to a twin-screw extruder, melt extrude, and cool to obtain modified ABS; The relevant operating parameters of the twin-screw extruder are as follows: 8 temperature zones: Zone 1: 185℃, Zone 2: 195℃, Zone 3: 205℃, Zone 4: 215℃, Zone 5: 215℃, Zone 6: 220℃, Zone 7: 220℃, Zone 8: 220℃; Die head temperature: 215℃; Main extruder speed: 250 rpm; Feeding speed: 60 rpm. S12: Preparation of interlayer bonding accelerator: (1) Add 12.5 parts of ABS-g-MAH, 3.75 parts of PA-66, 7.5 parts of SEBS-g-MAH, and 0.2 parts of antioxidant to a mixer and stir thoroughly to obtain a mixture; (2) Add the mixture obtained in (1) to a twin-screw extruder, melt extrude, and cool to obtain the interlayer bonding accelerator; The relevant operating parameters of the twin-screw extruder are as follows: 8 temperature zones: Zone 1: 240℃, Zone 2: 245℃, Zone 3: 250℃, Zone 4: 255℃, Zone 5: 255℃, Zone 6: 255℃, Zone 7: 260℃, Zone 8: 260℃; Die head temperature: 255℃; Main extruder speed: 250 rpm; Feeding speed: 60 rpm. S13: Preparation of ABS modified glass fiber: (1) Add 3-aminopropyltriethoxysilane to 75wt% ethanol aqueous solution, adjust pH to 5, stir and mix for 30min to obtain aminosilane hydrolysate, wherein the volume ratio of 3-aminopropyltriethoxysilane to ethanol aqueous solution is 0.075:1; (2) Add glass fiber to aminosilane hydrolysate for soaking treatment for 2h, filter, wash and vacuum dry to obtain amino modified glass fiber, wherein the ratio of glass fiber to aminosilane coupling agent is 1g:5mL; (3) Add 4.5 parts of ABS-g-MAH and 22.5 parts of amino modified glass fiber to 100 parts of N,N-dimethylformamide, ultrasonically disperse for 20min, stir and react at 130℃ for 16h, filter, wash and vacuum dry to obtain ABS modified glass fiber; S2: Preparation of 3D Printing ABS Material: S21: Place the modified ABS, interlayer bonding accelerator, and ABS modified glass fiber in a vacuum drying oven at 80℃ and dry for 4 hours. S22: ABS681 and modified ABS are mixed and compounded at a mass ratio of 1:1 to obtain ABS; S23: Add 70 parts ABS, 30 parts PS-g-MAH, 12.5 parts interlayer bonding accelerator, 15 parts ABS modified glass fiber, 0.4 parts antioxidant, 0.5 parts TAS-2A, and 0.2 parts 3-glycidyl ether oxypropyltriethoxysilane to a mixer and stir thoroughly to obtain a mixture. S24: The mixture obtained in S3 is added to a twin-screw extruder, melt-extruded, and cooled to obtain 3D printed ABS material; The relevant operating parameters of the twin-screw extruder are as follows: the eight temperature zones are: Zone 1: 180℃, Zone 2: 200℃, Zone 3: 205℃, Zone 4: 205℃, Zone 5: 205℃, Zone 6: 205℃, Zone 7: 205℃, Zone 8: 205℃; the die head temperature is 200℃; the main extruder speed is 150 rpm; and the feed speed is 20 rpm.

[0038] Example 2: A method for preparing 3D printed ABS material: Example 2 is based on Example 1, but with adjustments made to the blending ratio of ABS681 and modified ABS. Only ABS681 is used as the ABS in the raw material, while other processes remain unchanged. Specifically: S22: Add 70 parts of ABS681, 30 parts of PS-g-MAH, 12.5 parts of interlayer bonding accelerator, 15 parts of ABS modified glass fiber, 0.4 parts of antioxidant, 0.5 parts of TAS-2A, and 0.2 parts of 3-glycidyl etheroxypropyltriethoxysilane to a mixer and stir thoroughly to obtain a mixture.

[0039] Example 3: A method for preparing 3D printed ABS material: Example 3 is based on Example 1, but the mixing ratio of ABS681 and modified ABS is adjusted from 1:1 to 1:1.2, while other processes remain unchanged. Specifically: S2: Preparation of 3D Printing ABS Material: S21: Place the modified ABS, interlayer bonding accelerator, and ABS modified glass fiber in a vacuum drying oven at 80℃ and dry for 4 hours. S22: ABS681 and modified ABS are mixed and compounded at a mass ratio of 1:1.2 to obtain ABS; S23: Add 70 parts ABS, 30 parts PS-g-MAH, 12.5 parts interlayer bonding accelerator, 15 parts ABS modified glass fiber, 0.4 parts antioxidant, 0.5 parts TAS-2A, and 0.2 parts 3-glycidyl etheroxypropyltriethoxysilane to a mixer and stir thoroughly to obtain a mixture.

[0040] Example 4: A method for preparing 3D printed ABS material: Example 4 is based on Example 1, but with the following adjustment: the amount of raw material components in the 3D printing ABS material is adjusted, while other aspects remain unchanged. Specifically: S23: Add 70 parts ABS, 30 parts PS-g-MAH, 10 parts interlayer bonding accelerator, 10 parts ABS modified glass fiber, 0.4 parts antioxidant, 0.5 parts TAS-2A, and 0.2 parts 3-glycidyl ether oxypropyltriethoxysilane to a mixer and stir thoroughly to obtain a mixture.

[0041] Example 5: A method for preparing 3D printed ABS material: Example 5 is based on Example 1, but with the following adjustment: the amount of raw material components in the 3D printing ABS material is adjusted, while other aspects remain unchanged. Specifically: S23: Add 70 parts ABS, 30 parts PS-g-MAH, 15 parts interlayer bonding accelerator, 20 parts ABS modified glass fiber, 0.4 parts antioxidant, 0.5 parts TAS-2A, and 0.2 parts 3-glycidyl ether oxypropyltriethoxysilane to a mixer and stir thoroughly to obtain a mixture.

[0042] Based on Example 1, the following comparative experiments were conducted, setting up Comparative Examples 1 to 4, to verify the synergistic structure-activity relationship among modified ABS, interlayer bonding accelerator, and ABS-modified glass fiber, as well as the technical effects produced by each component, as detailed below: Comparative Example 1: A method for preparing 3D printed ABS material: Comparative Example 1 is based on Example 1, with the following adjustment: no interlayer bonding promoter is added, while other processes remain unchanged. Specifically: S23: Add 70 parts ABS, 30 parts PS-g-MAH, 15 parts ABS modified glass fiber, 0.4 parts antioxidant, 0.5 parts TAS-2A, and 0.2 parts 3-glycidyl ether oxypropyltriethoxysilane to a mixer and stir thoroughly to obtain a mixture.

[0043] Comparative Example 2: A method for preparing 3D printed ABS material: Comparative Example 2 is based on Example 1, with the following adjustment: ABS-modified glass fiber is not added, while other processes remain unchanged. Specifically: S23: Add 70 parts ABS, 30 parts PS-g-MAH, 12.5 parts interlayer bonding accelerator, 0.4 parts antioxidant, 0.5 parts TAS-2A, and 0.2 parts 3-glycidyl etheroxypropyltriethoxysilane to a mixer and stir thoroughly to obtain a mixture.

[0044] Comparative Example 3: A method for preparing 3D printed ABS material: Comparative Example 3 is based on Example 1, with the following adjustments: PA-66 and SEBS-g-MAH are added directly instead of an interlayer bonding promoter, while other processes remain unchanged. Specifically: S23: Add 70 parts ABS, 30 parts PS-g-MAH, 1.96 parts PA-66 (the proportion of PA-66 in 12.5 parts interlayer bonding accelerator), 3.92 parts SEBS-g-MAH (the proportion of SEBS-g-MAH in 12.5 parts interlayer bonding accelerator), 15 parts ABS modified glass fiber, 0.4 parts antioxidant, 0.5 parts TAS-2A, and 0.2 parts 3-glycidyl etheroxypropyltriethoxysilane to a mixer and stir thoroughly to obtain a mixture.

[0045] Comparative Example 4: A method for preparing 3D printed ABS material: Comparative Example 4 is based on Example 1, with the following adjustments: modified ABS, interlayer bonding accelerator, and ABS-modified glass fiber are not introduced, while other processes remain unchanged. Specifically: S1: Preparation of 3D Printing ABS Material: S11: Add 70 parts ABS681, 30 parts PS-g-MAH, 0.4 parts antioxidant, 0.5 parts brightening dispersant, and 0.2 parts 3-glycidyl etheroxypropyltriethoxysilane to a mixer and stir thoroughly to obtain a mixture. S12: The mixture obtained in S11 is added to a twin-screw extruder, melt-extruded, and cooled to obtain 3D printed ABS material; The relevant operating parameters of the twin-screw extruder are as follows: the eight temperature zones are: Zone 1: 180℃, Zone 2: 200℃, Zone 3: 205℃, Zone 4: 205℃, Zone 5: 205℃, Zone 6: 205℃, Zone 7: 205℃, Zone 8: 205℃; the die head temperature is 200℃; the main extruder speed is 150 rpm; and the feed speed is 20 rpm.

[0046] Performance Test 1: The 3D printed ABS materials prepared in Examples 1-5 and Comparative Examples 1-4 were added to a wire drawing machine, heated to 200°C, melt-extruded, drawn into filaments, water-cooled at 50°C, and wound to obtain 3D printed ABS filaments. A 1509X 3D printer was used to print the 3D printed ABS filaments into standard specimen sizes specified by various ASTM standards, and relevant performance tests were conducted. The volume shrinkage rate was tested as follows: Volume shrinkage rate: A test specimen with dimensions of 150 mm (length) × 10 mm (width) × 3 mm (thickness) was obtained by 3D printing. The length, width and height of the cured test specimen were measured at room temperature, and its volume shrinkage rate was calculated. Volume shrinkage rate = (original volume - final volume) / original volume × 100%; the formability was evaluated by the volume shrinkage rate. The specific test data results are shown in Table 1:

[0047] Performance Test 2: The 3D printed ABS materials prepared in Example 1 and Comparative Example 4 were added to a wire drawing machine, heated to 200°C, melt-extruded, drawn into filaments, water-cooled at 50°C, and wound to obtain 3D printed ABS filaments. A 1509X 3D printer was used to print the 3D printed ABS filaments into standard specimen sizes specified by various ASTM standards, and relevant performance tests were conducted. Specific test data results are shown in Table 2.

[0048] Results Analysis: As can be seen from the data in Tables 1 and 2 above, this invention, through the synergistic effect of multiple components such as modified ABS, interlayer bonding promoter, and ABS modified glass fiber, and by controlling the appropriate dosage relationship, comprehensively prepares a 3D printing ABS material with excellent thermal stability, moisture resistance, molding stability, and interlayer interface bonding. None of these components can be omitted.

[0049] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing 3D printed ABS material, characterized in that: Includes the following steps: S1: Mix ABS, PS-g-MAH, interlayer bonding accelerator, ABS modified glass fiber, antioxidant, brightening dispersant, and epoxy silane coupling agent evenly to obtain a mixture. S2: Melt and extrude the mixture, then cool it to obtain 3D printed ABS material; The 3D printing ABS material comprises the following raw material components in parts by weight: 65-75 parts ABS, 25-35 parts PS-g-MAH, 10-15 parts interlayer bonding accelerator, 10-20 parts ABS modified glass fiber, 0.1-0.5 parts antioxidant, 0.1-1 part gloss dispersant, and 0.1-0.5 parts epoxy silane coupling agent; The ABS includes conventional ABS and modified ABS with a mass ratio of 1:(0~1.2); The modified ABS is obtained by melt extrusion of fluorinated acrylate and conventional ABS; The interlayer bonding accelerator is obtained by melt extrusion of ABS-g-MAH, PA-66, and SEBS-g-MAH.

2. The method for preparing 3D printed ABS material according to claim 1, characterized in that: The specific preparation method of the modified ABS is as follows: mix conventional ABS, fluorinated acrylate, antioxidant, and dicumyl peroxide evenly; melt extrude, cool, and obtain modified ABS.

3. The method for preparing 3D printed ABS material according to claim 2, characterized in that: The modified ABS comprises the following raw material components in parts by weight: 75-85 parts of conventional ABS, 2-8 parts of fluorinated acrylate, 0.1-0.3 parts of dicumyl peroxide, and 0.1-0.3 parts of antioxidant.

4. The method for preparing 3D printed ABS material according to claim 1, characterized in that: The specific preparation method of the interlayer bonding accelerator is as follows: ABS-g-MAH, PA-66, SEBS-g-MAH and antioxidant are mixed evenly; after melt extrusion and cooling, the interlayer bonding accelerator is obtained.

5. A method for preparing 3D printed ABS material according to claim 4, characterized in that: The interlayer bonding promoter comprises the following raw material components in parts by weight: 10-15 parts of ABS-g-MAH, 2.5-5 parts of PA-66, 5-10 parts of SEBS-g-MAH, and 0.1-0.3 parts of antioxidant.

6. The method for preparing 3D printed ABS material according to claim 1, characterized in that: The ABS-modified glass fiber is obtained by modifying glass fiber with an aminosilane coupling agent and then grafting it with ABS-g-MAH.

7. A method for preparing 3D printed ABS material according to claim 6, characterized in that: The specific preparation method of the ABS modified glass fiber is as follows: (1) Add aminosilane coupling agent to ethanol aqueous solution, adjust pH to 5~5.5, stir and mix to obtain aminosilane hydrolysate; (2) Add glass fiber to aminosilane hydrolysate for soaking treatment, filter, wash and vacuum dry to obtain amino modified glass fiber; (3) Add ABS-g-MAH and amino modified glass fiber to N,N-dimethylformamide, ultrasonically disperse, stir and react at 120~140℃, filter, wash and vacuum dry to obtain ABS modified glass fiber.

8. A method for preparing 3D printed ABS material according to claim 7, characterized in that: The volume ratio of the aminosilane coupling agent and the ethanol aqueous solution is (0.05~0.1):1; The ratio of glass fiber to aminosilane coupling agent is (1~2)g:(5~10)mL; The ABS modified glass fiber comprises the following raw material components in parts by weight: 3-6 parts of ABS-g-MAH, 20-25 parts of amino modified glass fiber, and 80-100 parts of N,N-dimethylformamide.

9. A method for preparing 3D printed ABS material according to claim 1, characterized in that: The 3D printed ABS material is melt-extruded by a twin-screw extruder. The relevant operating parameters of the twin-screw extruder are as follows: it includes 8 temperature zones, with the temperature range of zones 1 to 8 being 180 to 210°C; the die head temperature is 200 to 205°C; the main extruder speed is 100 to 200 rpm; and the feed speed is 10 to 30 rpm.

10. A 3D printed ABS material prepared by the method for preparing 3D printed ABS material according to any one of claims 1 to 9.

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