Color oil for production of 3D printing supplies and coloring method of color oil

Abstract

The invention relates to color oil for 3D printing consumable production and a coloring method thereof.The color oil is prepared from, by weight, 40-60 parts of carriers, 3-5 parts of solvent, 25-35 parts of modified pigment, 4-8 parts of wetting dispersant and 10-15 parts of functional additive, the carriers comprise acetyl tributyl citrate, epoxidized soybean oil and polyethylene glycol adipate; the surface of the modified pigment is modified by KH-550. The three carriers and the modified pigment are adopted to synergistically form a stable system in the color oil, so that the color oil accidentally obtains the performance of improving the dispersity and tinting strength of the pigment when being applied to the 3D printing consumables.

Description

Technical Field

[0001] This application relates to the field of 3D printing consumables coloring, and in particular to a coloring oil for 3D printing consumables production and a coloring method thereof. Background Technology

[0002] As the core raw material of 3D printing technology, the performance and quality of 3D printing filaments directly affect key indicators such as the precision, strength, and appearance of printed products. Among these, the color representation of filaments is an important aspect of meeting personalized design and functional requirements. For example, different colors are needed to distinguish structural components in architectural models, a rich color palette is required in the consumer goods sector to achieve product aesthetics, and specific colors may be used to mark lesion areas in medical models.

[0003] Currently, the mainstream coloring processes for 3D printing consumables can be divided into two categories: masterbatch coloring and pigment coloring. Masterbatch coloring requires pre-blending high-concentration pigments with carrier resin using a twin-screw extruder to produce high-color-content particles, i.e., masterbatch. During the production of end-use consumables, the masterbatch is mixed with the consumable base material particles in a specific ratio and co-extruded into colored filaments using a single-screw extruder. Pigment coloring eliminates the masterbatch pre-processing step, directly mixing the consumable base material particles with micron-sized colored pigment powder, and then melt-extruding the mixture to produce colored filaments. However, both of the above processes have significant technical limitations. Existing coloring processes have obvious drawbacks. In the masterbatch coloring method, the production of masterbatch involves a high-temperature melt extrusion process. The mixing with the consumable base material particles relies on the diffusion effect of the masterbatch melt at high temperatures, resulting in poor pigment distribution uniformity. This is especially noticeable when producing light-colored printing consumables with low pigment addition ratios, leading to significant color differences. Furthermore, the entire production process requires two extrusion heat treatments, which undoubtedly increases processing costs and energy consumption. While the pigment powder coloring method simplifies the process, the lack of strong shearing action in the extruder during the wire forming stage makes it difficult to achieve uniform molecular-level dispersion of pigment powder. This results in color spots and streaks in the extruded colored wire, and even color differences can exist within the same batch. Simultaneously, micron-sized pigment powder easily forms dust, polluting the production environment and posing a health risk to the respiratory system of operators. Summary of the Invention

[0004] In order to improve the uniformity of pigment dispersion and coloring power in consumable base materials, this application provides a color oil for 3D printing consumable production and a coloring method thereof.

[0005] Firstly, this application provides a colorant for 3D printing consumables production, employing the following technical solution: A color oil for producing 3D printing consumables comprises the following components in parts by weight: 40-60 parts carrier, 3-5 parts solvent, 25-35 parts modified pigment, 4-8 parts wetting and dispersing agent, and 10-15 parts functional additive. The carrier includes tributyl acetylacetonate, epoxidized soybean oil, and polyethylene adipate. The surface of the modified pigment is modified with KH-550.

[0006] The inventors discovered that modifying the pigment surface with KH-550 and using a compound of acetylated tributyl citrate, epoxidized soybean oil, and polyethylene adipate as a pigment carrier, can unexpectedly improve the dispersibility and tinting strength of pigments used in the production of 3D printing consumables.

[0007] Specifically, after the pigment surface is modified by KH-550, the silanoxy groups on KH-550 are hydrolyzed to generate silanol groups, which condense with the hydroxyl groups on the pigment surface to form covalent bonds, forming a stable chemical bond, and retaining the amino groups on the pigment surface.

[0008] Acetyl tributyl citrate has low viscosity and good flowability, which can quickly penetrate into the gaps of pigment aggregates. Furthermore, the amino groups on the pigment surface can form hydrogen bonds with the ester groups of acetyl tributyl citrate. These hydrogen bonds fill the gaps inside the pigment aggregates, thereby opening up the aggregate structure. This not only improves the dispersibility of the pigment but also exposes more amino sites in the pigment.

[0009] The amino groups on the pigment surface can also undergo ring-opening reactions with the epoxy groups of epoxidized soybean oil, forming chemical cross-links and enhancing the anchoring of the pigment to the epoxidized soybean oil molecules. At the same time, the epoxy groups of epoxidized soybean oil have excellent adhesion to printing consumable base materials (such as polylactic acid consumable base material particles), and the ring-opened hydroxyl groups further promote the adhesion of the pigment to the printing consumable base material.

[0010] The hydroxyl groups on epoxidized soybean oil after ring opening can also form hydrogen bonds with the ether bonds of polyethylene adipate, and the long methylene chain of polyethylene adipate can combine with the ester groups of tributyl acetyl citrate through hydrogen bonds to form a carrier network. The three synergistically improve the dispersion stability of the mixed carrier and also enhance the shear resistance of the system.

[0011] The amino groups on the pigment surface can also form hydrogen bonds with the ester groups of polyethylene adipate, achieving interfacial bonding between polyethylene adipate and the pigment. At the same time, the long methylene chains of polyethylene adipate can diffuse to the interface, strengthening the spatial resistance between pigment particles through chain segment entanglement, further enhancing the dispersibility of pigment particles. The entanglement of the long methylene chains of polyethylene adipate, together with the hydrogen bonding between pigments, further improves the dispersibility of pigments.

[0012] The inventors achieved an unexpectedly enhanced dispersibility and tinting strength when the color oil was applied to 3D printing consumables by using three carriers and modified pigments to synergistically form a stable system in the color oil.

[0013] In one specific feasible implementation, the solvent is diethylene glycol butyl ether.

[0014] Diethylene glycol butyl ether has a boiling point higher than the temperature at which pigment oils and consumable base materials are mixed and extruded. This avoids defects such as melt bubbles and pinholes caused by rapid solvent vaporization, ensuring the uniformity of the extruded wire diameter. Simultaneously, the hydroxyl groups of diethylene glycol butyl ether can combine with the amino groups on the pigment surface, thereby further enhancing the pigment dispersion effect.

[0015] In one specific implementation, the wetting and dispersing agent includes one or more of BYK-111, BYK-9706, BYK-164, BYK-2200, Solsperse 17000, and Solsperse 20000.

[0016] By adopting the above technical solutions, the selection of wetting and dispersing agents includes, but is not limited to, BYK-111, BYK-9706, BYK-164, BYK-2200, Solsperse 17000, and Solsperse 20000. This application preferably uses BYK-2200 as the wetting and dispersing agent. The molecular structure of BYK-2200 contains acidic phosphate groups and multiple polyester chains. The acidic phosphate groups can form ionic bonds with the amino groups on the pigment surface through acid-base interactions, thereby rapidly adsorbing onto the pigment surface and disintegrating the primary pigment aggregates during the initial shearing stage. The multiple polyester chains extend into the color oil system, forming an effective steric barrier around the pigment particles, preventing the pigment particles from approaching each other, providing long-term stability, and thus improving the dispersibility and hue stability of the color oil.

[0017] In one specific feasible implementation, the aforementioned functional additives include hindered phenolic stabilizers, phosphite stabilizers, and thioester antioxidants.

[0018] Hindered phenolic stabilizers (such as 1010) have multiple phenolic hydroxyl groups in their molecular structure. They can capture free radicals generated at high temperatures in the color oil system by releasing hydrogen ions, converting them into stable phenoxy radicals and terminating the free radical chain reaction. However, 1010 cannot remove the hydroperoxides already generated in the system, and these hydroperoxides will further decompose into new free radicals at high temperatures, causing the oxidation reaction to continue. Phosphite stabilizers (such as 168) decompose hydroperoxides into alcohols or ketones through a conversion reaction, blocking the free radical chain reaction. The combination of 1010 and 168 can significantly extend the oxidative stability of color oils and prolong their service life.

[0019] In the color oil system, the addition of dilauryl thiodipropionate as an auxiliary antioxidant can reduce the hydroperoxide generated by the free radical chain reaction of sulfur atoms with 1010 to alcohol, thereby preventing the oxidation reaction from continuing and prolonging the antioxidant effect of the modified pigment. During the storage of the color oil, it can maintain the antioxidant properties of the modified pigment for a long time and ensure the long-term effectiveness of the color oil.

[0020] In one specific feasible implementation, the aforementioned functional additives also include montmorillonite.

[0021] Montmorillonite possesses a unique interlayer structure, where the active groups of the carrier (such as the ester groups of acetylacetic acid tributyl ester, the epoxy groups of epoxidized soybean oil, and the ester groups of polyethylene adipate) interact with the interlayer forces of montmorillonite (such as hydrogen bonds and van der Waals forces). This interlayer structure of montmorillonite can form a "maze-like pathway," thereby hindering the migration of carrier molecules and ultimately blocking the diffusion of pigment molecules.

[0022] In one specific feasible implementation, the montmorillonite mentioned above is CTAB-modified montmorillonite.

[0023] By employing the above technical solution, CTAB acts as an intercalating agent within the interlayer of montmorillonite. This significantly expands the interlayer spacing and increases the specific surface area, providing more space for the adsorption and dispersion of pigment molecules. Furthermore, the long-chain alkyl groups of CTAB can be anchored to the surface of montmorillonite sheets through van der Waals forces, while the quaternary ammonium salt groups exchange ions with sodium ions in the interlayer of montmorillonite, changing the surface of montmorillonite from hydrophilic to oleophilic. Since the carriers in the color oil system (such as tributyl acetylacetonate, epoxidized soybean oil, and polyethylene adipate) are all organic oily components, CTAB-modified montmorillonite has better compatibility with organic oily carriers, enhancing the dispersibility of montmorillonite in oily color oil matrices and further improving the stability of the color oil.

[0024] In one specific implementation, the aforementioned functional additives also include hydrophobic fumed silica.

[0025] The addition of hydrophobic fumed silica (R972) acts as an anti-floating agent in the color oil system. Its hydrophobic surface can reduce the surface tension of the color oil, making the interfacial tension of each region of the color oil system more uniform, reducing the enrichment of pigment on the surface, and achieving the effect of preventing floating color.

[0026] In one specific implementation, the aforementioned functional adjuvant also includes a benzotriazole derivative.

[0027] The addition of benzotriazole derivative (T551) as a corrosion inhibitor to the pigment oil system can inhibit the catalytic effect of metal ions on the oxidation of pigment oil, improve the corrosion resistance of pigment oil to metal equipment, and enhance the stability of pigment in acid and alkaline environments.

[0028] In one specific implementation scheme, the aforementioned functional additives also include polyether-modified polydimethylsiloxane.

[0029] Polyether-modified polydimethylsiloxane (such as BYK-333) can reduce the surface tension of color oils in color oil systems, allowing the color oils to maintain stable fluidity even at high temperatures.

[0030] Secondly, this application provides a coloring method for producing 3D printing consumables, employing the following technical solution: A coloring method for pigments used in the production of 3D printing consumables includes the following steps: S1: Color oil preparation steps: After mixing the carrier, solvent, wetting and dispersing agent and functional additives, add the modified pigment and mix. After grinding, filter to form color oil; S2: Premixing step: Mix the consumable base material granules with the color oil to obtain a premixed material; S3: Melt blending extrusion step: The premixed material is fed into an extruder to melt and then extruded to form a 3D printing filament.

[0031] By using the above steps, 3D printing filaments with simplified processes, uniform pigment distribution, and strong tinting strength can be obtained.

[0032] In summary, this application includes at least one of the following beneficial technical effects: 1. This application utilizes three carriers and modified pigments to synergistically form a stable system in the color oil, thereby achieving unexpectedly enhanced dispersibility and tinting strength when the color oil is applied to 3D printing consumables.

[0033] 2. This application uses BYK-2200 as a wetting and dispersing agent to anchor on the surface of KH-550 modified pigment and form an effective three-dimensional barrier around the pigment particles, thereby improving the dispersibility and hue stability of the color oil.

[0034] 3. This application uses CTAB-modified montmorillonite as one of the functional additives. By utilizing its excellent interlayer structure, it can intercalate with the three carriers, thereby blocking the diffusion and migration of pigment molecules and improving the coloring power when the pigment is applied to 3D printing consumables. Detailed Implementation

[0035] The present application will be further described in detail below with reference to embodiments and comparative examples: Some of the raw materials used in the examples and comparative examples: Consumable base material granules (polylactic acid material, model: REVODE110, purchased from Dongguan Chuangnuo Plastics Co., Ltd.); Tributyl acetylacetonate (CAS: 77-90-7); epoxidized soybean oil (CAS: 8013-07-8, purchased from Meite (Hubei) New Materials Co., Ltd.); polyethylene adipate (CAS: 68647-16-5, purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd.); BYK-2200 (detailed model: DISPERBYK-2200, purchased from Dongguan Huazhiyuan Chemical Co., Ltd.); hindered phenolic stabilizer (model: Irganox®1010, purchased from Sa... Saheng Chemical (Shanghai) Co., Ltd.); Phosphite stabilizers (model: Irgafos®168, purchased from Saheng Chemical (Shanghai) Co., Ltd.); Thioester antioxidants (model: DLTP, purchased from Guangzhou Shanghe Chemical Technology Co., Ltd.); Montmorillonite (sodium-based montmorillonite, grade Y16776, purchased from Beijing Bio-Laibo Technology Co., Ltd.); CTAB (hexadecyltrimethylammonium bromide, CAS: 57-09-0); Hydrophobic fumed silica (grade: AEROSIL) R972 (CAS: 60842-32-2, purchased from Shaoxing Lijie Chemical Co., Ltd.); benzotriazole derivative (brand name: T551, purchased from Panhua Chemical (Shanghai) Co., Ltd.); polyether-modified polydimethylsiloxane (brand name: BYK-333, purchased from Guangzhou Soman Trading Co., Ltd.); the pigment is alkali-treated inorganic pigment titanium dioxide (rutile titanium dioxide, brand name: R-6618T, particle size: 0.2-0.4μm, purchased from Shandong Jinhai Titanium Industry Resources Technology Co., Ltd.) with a solid-liquid ratio of 1:20 (g:mL). Add titanium dioxide R-6618T to sodium hydroxide solution (1mol / L), heat to 40℃ and stir for 4h, then remove, rotate at 400rpm, wash with water and dry to obtain pigment.

[0036] Unless otherwise specified, all raw materials used in the examples and comparative examples are commercially available products.

[0037] Preparation Example 1 Preparation of modified pigments: 5 kg of pigment was dispersed in 30 L of 75% ethanol aqueous solution. 100 g of KH-550 was added dropwise at 25 °C at a rate of 1 drop / second. The mixture was stirred and reacted for 30 min. After centrifugation, the pigment was washed three times with deionized water and dried under vacuum at 60 °C to obtain a modified pigment with amino content on the surface.

[0038] Preparation Example 2 Preparation of CTAB-modified montmorillonite: 500g of sodium montmorillonite was added to 15 L of water and heated to 45℃ and stirred for 2 h to obtain a colloidal suspension. 18.2g of CTAB was added to 500mL of water and heated to 65℃ and stirred for 3 h. The pH of the solution was adjusted to 6 with dilute hydrochloric acid to obtain a CTAB solution. The CTAB solution was added dropwise to the colloidal suspension at a rate of 1 drop / second. The temperature was raised to 55℃ and stirred at a high speed of 300-500 r / min. After the addition was complete, the reaction was continued at 55℃ for 3 h. The solid product was separated by vacuum filtration and washed with water until no bromide ions were detected in the washing liquid to obtain CTAB-modified montmorillonite. Example

[0039] Example 1 S1: Color oil preparation steps: 1.8 kg of acetylated tributyl citrate, 2 kg of epoxidized soybean oil, 1.2 kg of polyethylene adipate, 0.4 kg of diethylene glycol butyl ether, 0.6 kg of BYK-2200, 0.15 kg of hindered phenolic stabilizer, 0.15 kg of phosphite stabilizer, 0.075 kg of thioester antioxidant, 0.25 kg of montmorillonite, 0.075 kg of benzotriazole derivative and polyether-modified polydimethylsiloxane were added to a disperser and stirred at room temperature and 400 r / min for 15 min. 3 kg of the modified pigment from Preparation Example 1 was added, and the mixture was heated to 45°C and stirred at 900 r / min for 30 min. After grinding until the pigment particle size D90 reached 2 μm, 0.15 kg of hydrophobic fumed silica was added and stirred at room temperature and 1000 r / min for 20 min. The finished color oil was obtained by filtering through a 200-mesh nylon screen.

[0040] S2: Premixing step: Add consumable base material granules and color oil to a mixer at a mass ratio of 105:1, and stir for 20 minutes at room temperature and a speed of 300 r / min to obtain a premixed material; S3: Melt Blending Extrusion Step: The premixed material is fed into a twin-screw extruder at a feed rate of 15 kg / h to melt-extrude and form 3D printing filament. (The temperature range of the twin-screw extruder is set as follows: Zone 1 160-170℃, Zone 2 170-180℃, Zone 3 180-190℃, and Die Head 180-185℃. The screw speed is set to 400 r / min.)

[0041] Example 2 The only difference between Example 2 and Example 1 is that the montmorillonite in step S1 is replaced with an equal amount of CTAB-modified montmorillonite.

[0042] Comparative Example 1 The only difference between Comparative Example 1 and Example 2 is that epoxidized soybean oil and polyethylene adipate were not added in step S1, and the amount of acetylacetic tributyl citrate was replaced by 5 kg instead of 1.8 kg.

[0043] Comparative Example 2 The only difference between Comparative Example 2 and Example 2 is that acetylsicottide tributyl ester and polyethylene adipate were not added in step S1, and the amount of epoxidized soybean oil was replaced from 2 kg to 5 kg.

[0044] Comparative Example 3 The only difference between Comparative Example 3 and Example 2 is that acetylsicottide tributyl ester and epoxidized soybean oil were not added in step S1, and the amount of polyethylene adipate was replaced from 1.2 kg to 5 kg.

[0045] Comparative Example 4 The only difference between Comparative Example 4 and Example 2 is that polyethylene adipate was not added in step S1, the amount of acetylsalicylic acid tributyl ester was replaced from 1.8 kg to 2.4 kg, and the amount of epoxidized soybean oil was replaced from 2 kg to 2.6 kg.

[0046] Comparative Example 5 The only difference between Comparative Example 5 and Example 2 is that epoxidized soybean oil was not added in step S1, the amount of acetylacetic acid tributyl ester was replaced from 1.8 kg to 2.8 kg, and the amount of polyethylene adipate was replaced from 1.2 kg to 2.2 kg.

[0047] Comparative Example 6 The only difference between Comparative Example 6 and Example 2 is that acetylthiose tributyl citrate was not added in step S1, the amount of epoxidized soybean oil was replaced from 2 kg to 2.9 kg, and the amount of polyethylene adipate was replaced from 1.2 kg to 2.1 kg.

[0048] Comparative Example 7 The only difference between Comparative Example 7 and Example 2 is that the modified pigment in step S1 is replaced with an equal amount of pigment.

[0049] 1. Take 10g of the 3D printing filaments prepared in Examples 1-2 and Comparative Examples 1-7 respectively, cut them into small pieces, dissolve them in dichloromethane, and centrifuge to separate the dispersed phase containing pigments as the test liquid. Test the dispersion performance of pigments in the 3D printing filaments according to the test standard GB / T 21867.1-2008.

[0050] Using the "completely dispersed standard sample" (D90=1μm, 60° gloss=98) as the benchmark, the test results are shown in Table 1: Table 1. Pigment dispersion test data in 3D printing filaments prepared in Examples 1-2 and Comparative Examples 1-7 Test results Pigment particle size D90 (μm) Particle size deviation rate (%) 60° gloss Gloss difference ΔG Dispersion levels (1-5, with level 5 being the best) Example 1 2.3 130 95 6 Level 4 Example 2 2.0 100 92 3 Level 5 Comparative Example 1 5.8 480 78 20 Level 1 Comparative Example 2 4.5 350 82 16 Level 1 Comparative Example 3 6.2 520 75 23 Level 1 Comparative Example 4 3.2 220 88 10 Level 2 Comparative Example 5 3.5 250 86 12 Level 2 Comparative Example 6 3.8 280 84 14 Level 2 Comparative Example 7 7.5 650 70 28 Level 1 2. Cut 10cm of the 3D printing filaments obtained in Examples 1-2 and Comparative Examples 1-7 respectively, and press them at 180℃ and 5MPa for 5 minutes to form a flat sheet with a thickness of 2mm. Test the tinting strength of the pigment in the 3D printing filaments according to the test standard of ISO 23900-3:2015.

[0051] Using the "standard colored sample" (L*=85.0, a*=2.0, b*=3.0) as a reference, ΔE*ab= Tinting strength was graded according to ISO 23900-3:2015: Excellent: ΔE*ab≤1.0 (no difference perceptible to the human eye, tinting strength perfectly matched); Good: 1.0<ΔE*ab≤2.0 (slightly perceptible to the human eye, tinting strength basically matched); Good: 1.0<ΔE*ab≤2.0 (slightly perceptible to the human eye, tinting strength basically matched); Good: 1.0<ΔE*ab≤2.0 (slightly perceptible to the human eye, tinting strength basically matched). The test results are shown in Table 2. Table 2. Pigment tinting strength test data in 3D printing filaments prepared in Examples 1-2 and Comparative Examples 1-7 Test results CIE LAB value (average) Total color difference ΔE*ab Tinting strength grade Example 1 L*=84.2, a*.3b*=3.3 0.9 excellent Example 2 L*=84.8, a*=2.1, b*=3.1 0.3 excellent Comparative Example 1 L*=78.5, a*=3.5, b*=5.0 6.8 Difference Comparative Example 2 L*=80.2, a*=3.2, b*=4.5 5.3 Difference Comparative Example 3 L*=77.8, a*=3.8, b*=5.2 7.5 Difference Comparative Example 4 L*=82.5, a*=2.7, b*=3.8 2.6 middle Comparative Example 5 L*=81.8, a*=2.8, b*=4.0 3.2 middle Comparative Example 6 L*=81.2, a*=2.9, b*=4.2 3.8 middle Comparative Example 7 L*=76.0, a*=4.2, b*=5.8 9.2 Difference Based on Examples 1-2 and Tables 1 and 2, the pigment dispersion performance and tinting strength in the 3D printing filament prepared in Example 2 are better than those in Example 1. This may be because the montmorillonite, after being modified by CTAB, converts its hydrophilicity to oleophilicity, which enhances the compatibility between montmorillonite and tributyl acetylacetonate, epoxidized soybean oil, and polyethylene adipate, thereby further improving the stability of the pigment oil.

[0052] Based on Examples 2, Comparative Examples 1-6, and Tables 1 and 2, the pigment dispersion performance and tinting strength of the 3D printing filament prepared in Example 2 are superior to those in Comparative Examples 1-6. This is likely due to the synergistic dispersion of pigment particles and the enhanced interfacial bonding between the pigment and the printing consumable base material by acetylated tributyl citrate, epoxidized soybean oil, and polyethylene adipate. This not only solves the problem of pigment agglomeration but also improves the bonding strength between the pigment and the printing consumable base material. Consequently, the 3D printing filament extruded from the pigment oil prepared by compounding acetylated tributyl citrate, epoxidized soybean oil, and polyethylene adipate in this application exhibits excellent dispersion performance and tinting strength.

[0053] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A colorant for producing 3D printing consumables, characterized in that, The product comprises the following components in parts by weight: 40-60 parts carrier, 3-5 parts solvent, 25-35 parts modified pigment, 4-8 parts wetting and dispersing agent, and 10-15 parts functional additives. The carrier includes tributyl acetylacetonate, epoxidized soybean oil, and polyethylene adipate. The surface of the modified pigment is modified with KH-550.

2. The colorant for 3D printing consumables production according to claim 1, characterized in that, The solvent is diethylene glycol butyl ether.

3. The colorant for 3D printing consumables production according to claim 1, characterized in that, The wetting and dispersing agent includes one or more of BYK-111, BYK-9706, BYK-164, BYK-2200, Solsperse 17000, and Solsperse 20000.

4. The colorant for 3D printing consumables production according to claim 1, characterized in that, The functional additives include hindered phenolic stabilizers, phosphite stabilizers, and thioester antioxidants.

5. The colorant for 3D printing consumables production according to claim 1, characterized in that, The functional additives also include montmorillonite.

6. The colorant for 3D printing consumables production according to claim 5, characterized in that, The montmorillonite mentioned is CTAB-modified montmorillonite.

7. The colorant for 3D printing consumables production according to claim 1, characterized in that, The functional additives also include hydrophobic fumed silica.

8. The colorant for 3D printing consumables production according to claim 1, characterized in that, The functional additives also include benzotriazole derivatives.

9. The colorant for 3D printing consumables production according to claim 1, characterized in that, The functional additives also include polyether-modified polydimethylsiloxane.

10. A coloring method for the pigment used in the production of 3D printing consumables according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Color oil preparation steps: After mixing the carrier, solvent, wetting and dispersing agent and functional additives, add the modified pigment and mix. After grinding, filter to form color oil; S2: Premixing step: Mix the consumable base material granules with the color oil to obtain a premixed material; S3: Melt blending extrusion step: The premixed material is fed into an extruder to melt and then extruded to form a 3D printing filament.