CN112538227B - Low-VOC-released ASA/PC3D printing wire and preparation method thereof - Google Patents
Low-VOC-released ASA/PC3D printing wire and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a low-VOC released ASA/PC3D printing wire, which takes ASA/PC resin as a raw material and is added with modified porous calcium silicate, an accelerator, a heat stabilizer, an antioxidant and a lubricant. In addition, the invention also discloses a preparation method of the 3D printing wire, the prepared ASA/PC3D printing wire has less VOC release in the 3D printing forming process and good odor in the forming process, and the greening of the 3D printing forming process is effectively realized.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to an ASA/PC3D printing wire with low VOC release and a preparation method thereof.
Background
3D printing is a novel manufacturing technology integrating multiple disciplines of machinery, software and materials. The material stacking and forming principle is adopted, and the material stacking and forming device is widely applied to the fields of engineering, education, medical treatment and the like. Fused deposition modeling is one of the mainstream technologies of 3D printing, and is attracting attention due to its low cost, safe operation, simple post-treatment, and the like.
ASA resins are triblock copolymers composed of acrylonitrile, styrene and acrylate. The material has excellent processability, mechanical property and chemical corrosion resistance, and also has good weather resistance. The PC resin has good mechanical property, heat resistance and stability, is an ideal thermoplastic engineering plastic, and is widely applied to the fields of automobiles, electronic instruments and the like.
However, in the fused deposition modeling process, the ASA/PC material is mainly melted and stacked by the continuous high-temperature heating of the nozzle, which causes the ASA/PC material to undergo degradation, and this process releases a large amount of organic volatile compounds (VOCs), so as to generate a pungent odor, and seriously affect the working environment and physical and mental health of operators. Therefore, solving the problem of greening of the ASA/PC material in the 3D printing and forming process becomes particularly important.
In addition, the application of ASA/PC materials in 3D printing molding is not reported, and the report of VOC release amount in the molding process is not related.
Disclosure of Invention
In view of the above, the invention aims to provide an ASA/PC3D printing wire with low VOC release and a preparation method thereof.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the low VOC released ASA/PC3D printing wire comprises, by weight, 50-70% of ASA resin, 20-30% of PC resin, 5-15% of modified porous calcium silicate, 0.2-2% of accelerator, 0.2-2% of heat stabilizer, 0.2-1% of antioxidant and 0.2-2% of lubricant. The sum of the components is 100 percent.
Further, the preparation method of the modified porous calcium silicate comprises the following steps: firstly, putting 20-50 g of porous calcium silicate into 1L of deionized water, performing ultrasonic dispersion for 0.5-2 h, adding 5-20 ml of acetic acid under stirring, then adding 1-10 g of chitosan, reacting for 2-6 h under the condition of stirring at room temperature, filtering, washing to be neutral, and drying to obtain the modified porous calcium silicate.
Further, the modified porous calcium silicate contains hydroxyl groups and amino groups.
Further, the heat stabilizer includes at least one of calcium stearate, zinc stearate, and magnesium stearate.
Further, the accelerator includes at least one of monobutyl tin oxide, dibutyl tin oxide, tributyl tin chloride, and butyl tin trichloride.
Further, the antioxidant comprises at least one of antioxidant DNP, antioxidant 1010 and antioxidant CA.
Further, the lubricant includes at least one of silicone oil, stearic acid, and paraffin wax.
After the technical scheme is adopted, the ASA/PC3D printing wire with low VOC release has the following beneficial effects:
(1) According to the invention, by adding the modified porous calcium silicate, the accelerator and the heat stabilizer, the modified porous calcium silicate and the ASA/PC molecular chain or the ASA and PC molecular chain are promoted to act, so that the thermal stability of the ASA/PC molecular chain is improved, the thermal degradation behavior of the material is inhibited, and the VOC release source is reduced. Through experimental tests, the wire rod forming process of the invention has low VOC release (VOC value is less than 32 mu g/m 3 Basically maintained at 22-32 mu g/m 3 )；
(2) The irritant gas is effectively reacted or adsorbed by the modified porous calcium silicate, so that volatilization is reduced, and the problem of the irritant odor generated in the 3D printing and forming process is solved. Experiments prove that the 3D printing wire rod has good odor in the forming process. The modified ASA/PC material has high thermal stability, and the release amount of the synchronously generated irritant gas is reduced;
(3) Through experimental tests, the 3D printing wire provided by the invention has good forming property and mechanical property. The modified ASA/PC material has proper melt flow rate and lower thermal expansion coefficient, i.e. the material has smooth printing performance and dimensional stability. In addition, after the modified porous calcium silicate and the accelerator are added, the mechanical property of the material is effectively improved due to the enhancement effect of the modified porous calcium silicate and the promotion effect of the accelerator on transesterification.
Furthermore, the modified porous calcium silicate is rich in active sites such as hydroxyl, amino and the like and excellent in adsorption performance, and can efficiently react or adsorb the generated VOC, fix the VOC and reduce the escape, so that the release amount of the VOC in the forming process is reduced.
A preparation method of ASA/PC3D printing wire with low VOC release comprises the following steps:
step 1: preparing modified porous calcium silicate: putting 20-50 g of porous calcium silicate into 1L of deionized water, performing ultrasonic dispersion for 0.5-2 h, adding 5-20 ml of acetic acid under stirring, then adding 1-10 g of chitosan, reacting for 2-6 h under the condition of stirring at room temperature, filtering, washing to be neutral, and drying to obtain modified porous calcium silicate;
step 2: respectively vacuum drying ASA resin, PC resin, modified porous calcium silicate, accelerator, heat stabilizer and antioxidant, and weighing the dried components according to the following weight percentage: 50-70% of ASA resin, 20-30% of PC resin, 5-15% of modified porous calcium silicate, 0.2-2% of accelerator, 0.2-2% of heat stabilizer, 0.2-1% of antioxidant and 0.2-2% of lubricant, and then uniformly mixing the weighed components to obtain a mixture, and carrying out melt extrusion on the mixture by a double-screw extruder to obtain blending particles, wherein the temperature of a charging barrel is 180-240 ℃, and the rotating speed of a screw is 80-200 rpm;
step 3: and (3) extruding, shaping, traction and winding the blended particles prepared in the step (2) through a wire rod machine to obtain the 3D printing wire rod, wherein the temperature of a material cylinder is 180-240 ℃, and the rotating speed of a screw rod is 20-100 rpm.
Further, the heat stabilizer includes at least one of calcium stearate, zinc stearate, and magnesium stearate.
Further, the accelerator includes at least one of monobutyl tin oxide, dibutyl tin oxide, tributyl tin chloride, and butyl tin trichloride.
After the technical scheme is adopted, the preparation method of the ASA/PC3D printing wire with low VOC release has the following beneficial effects:
(1) According to the invention, by adding the modified porous calcium silicate, the accelerator and the heat stabilizer, the modified porous calcium silicate and the ASA/PC molecular chain or the ASA and PC molecular chain are promoted to act, so that the thermal stability of the ASA/PC molecular chain is improved, the thermal degradation behavior of the material is inhibited, and the VOC release source is reduced. Through experimental tests, the wire rod forming process of the invention has low VOC release (VOC value is less than 32 mu g/m 3 Basically maintained at 22-32 mu g/m 3 )；
(2) The modified porous calcium silicate is rich in active sites such as hydroxyl and amino, has excellent adsorption performance, and can efficiently react or adsorb the generated VOC, fix the VOC and reduce the escape, thereby reducing the release amount of the VOC in the forming process.
(3) The irritant gas is effectively reacted or adsorbed by the modified porous calcium silicate, so that volatilization is reduced, and the problem of the irritant odor generated in the 3D printing and forming process is solved. Experiments prove that the 3D printing wire rod has good odor in the forming process. The modified ASA/PC material has high thermal stability, and the release amount of the synchronously generated irritant gas is reduced;
(4) Through experimental tests, the 3D printing wire provided by the invention has good forming property and mechanical property. The modified ASA/PC material has proper melt flow rate and lower thermal expansion coefficient, i.e. the material has smooth printing performance and dimensional stability. In addition, after the modified porous calcium silicate and the accelerator are added, the mechanical property of the material is effectively improved due to the enhancement effect of the modified porous calcium silicate and the promotion effect of the accelerator on transesterification.
Detailed Description
In order to further explain the technical scheme of the invention, the invention is explained in detail by specific examples.
Example 1
The low VOC released ASA/PC3D printing wire comprises the following components in percentage by weight: 50% of ASA, 30% of PC, 15% of modified porous calcium silicate, 0.5% of monobutyl tin oxide, 2% of zinc stearate, 0.5% of antioxidant 1010{ tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester } and 2% of paraffin.
A preparation method of ASA/PC3D printing wire with low VOC release comprises the following steps:
(1) The preparation method of the modified porous calcium silicate comprises the following steps:
A. putting 25g of porous calcium silicate into 1L of deionized water, performing ultrasonic dispersion for 1h, and adding 8ml of acetic acid under stirring;
B. then adding 2g of chitosan, reacting for 2 hours under the condition of stirring at room temperature, filtering, washing to be neutral and drying to obtain the modified porous calcium silicate.
(2) And (3) respectively vacuum-drying ASA, PC, modified porous calcium silicate, monobutyl tin oxide, zinc stearate and antioxidant 1010, accurately weighing the dried components and paraffin according to the weight percentage, then uniformly mixing the weighed components in a high-speed mixer to obtain a mixture, and carrying out melt extrusion on the mixture by a double-screw extruder to obtain blending particles, wherein the temperature of a charging barrel is 180, 195, 220, 235, 240 and 235 ℃ and the rotating speed of a screw is 100rpm.
(3) Extruding, shaping, traction and winding the blended particles prepared in the step (2) through a wire rod machine to obtain the 3D printing wire rod, wherein the temperature of a charging barrel is 180, 198, 220, 236, 240 and 236 ℃, and the rotating speed of a screw rod is 40rpm.
Further, the 3D printing wire obtained in the step (3) was subjected to 3D printing molding, and the VOC released amount (DB 35/1784-2018), the odor rating, the thermal expansion coefficient (GB/T2572-2005), the melt flow rate (GB/T3682.1-2018), the tensile strength (GB/T1040.2-2006) and the impact strength (GB/T1043.1-2008) during the 3D printing molding were measured, and the test results were shown in Table 1.
Compared with the prior art, the invention has the beneficial effects that:
(1) The forming process is low in VOC emissions. On one hand, by adding modified porous calcium silicate, an accelerator and a heat stabilizer, the modified porous calcium silicate is promoted to act with ASA/PC molecular chains or act between ASA and PC molecular chains, so that the thermal stability of the ASA/PC molecular chains is improved, the thermal degradation behavior of the material is inhibited, and the VOC release source is reduced; on the other hand, the modified porous calcium silicate is rich in active sites such as hydroxyl, amino and the like and excellent in adsorption performance, and can efficiently react or adsorb the generated VOC, fix the VOC and reduce the escape of the VOC, so that the release amount of the VOC in the forming process is reduced.
(2) The odor is good in the molding process. The modified ASA/PC material has high thermal stability, and the release amount of the synchronously generated irritant gas is reduced; meanwhile, the irritant gas is effectively reacted or adsorbed by the modified porous calcium silicate, so that volatilization is reduced, and the problem of the irritant odor generated in the 3D printing and forming process is solved.
(3) Good forming property and mechanical property. The modified ASA/PC material has proper melt flow rate and lower thermal expansion coefficient, i.e. the material has smooth printing performance and dimensional stability. In addition, after the modified porous calcium silicate and the accelerator are added, the mechanical property of the material is effectively improved due to the enhancement effect of the modified porous calcium silicate and the promotion effect of the accelerator on transesterification.
Example 2
The low VOC released ASA/PC3D printing wire comprises the following components in percentage by weight: 53% of ASA, 28% of PC, 14% of modified porous calcium silicate, 0.3% of tributyltin chloride, 2% of calcium stearate, 0.7% of antioxidant CA [1, 3-tri (2-methyl-4-hydroxy-5-tert-butylphenyl) butane ] and 2% of silicone oil.
A preparation method of ASA/PC3D printing wire with low VOC release comprises the following steps:
(1) The preparation method of the modified porous calcium silicate comprises the following steps:
A. 35g of porous calcium silicate is put into 1L of deionized water to be dispersed for 0.5h by ultrasonic, and 10ml of acetic acid is added under stirring;
B. then 5g of chitosan is added to react for 3 hours under the condition of stirring at room temperature, and then the mixture is filtered, washed to be neutral and dried to obtain the modified porous calcium silicate.
(2) Respectively vacuum drying ASA, PC, modified porous calcium silicate, tributyl tin chloride, calcium stearate and antioxidant CA, accurately weighing the dried components and silicone oil according to the weight percentage, then placing the weighed components into a high-speed mixer for uniformly mixing to obtain a mixture, and carrying out melt extrusion on the mixture by a double-screw extruder to obtain blending particles, wherein the temperature of a charging barrel is 182, 195, 218, 235, 240 and 237 ℃ and the rotating speed of a screw is 120rpm.
(3) Extruding, shaping, traction and winding the blended particles prepared in the step (2) through a wire rod machine to obtain the 3D printing wire rod, wherein the temperature of a charging barrel is 180 ℃, 200, 218, 238, 240 and 235 ℃, and the rotating speed of a screw rod is 65rpm.
Further, the 3D printing wire obtained in the step (3) was subjected to 3D printing molding, and the VOC released amount (DB 35/1784-2018), the odor rating, the thermal expansion coefficient (GB/T2572-2005), the melt flow rate (GB/T3682.1-2018), the tensile strength (GB/T1040.2-2006) and the impact strength (GB/T1043.1-2008) during the 3D printing molding were measured, and the test results were shown in Table 1.
Example 3
The low VOC released ASA/PC3D printing wire comprises the following components in percentage by weight: ASA 63%, PC 21%, modified porous calcium silicate 12%, butyl tin trichloride 0.6%, magnesium stearate 1.3%, antioxidant DNP [ N, N' -di (β -naphthyl) p-phenylenediamine) ]0.6% and stearic acid 1.5%.
A preparation method of ASA/PC3D printing wire with low VOC release comprises the following steps:
(1) The preparation method of the modified porous calcium silicate comprises the following steps:
A. putting 20g of porous calcium silicate into 1L of deionized water, performing ultrasonic dispersion for 2 hours, and adding 5ml of acetic acid under stirring;
B. then 1.5g of chitosan is added to react for 2 hours under the condition of stirring at room temperature, and then the mixture is filtered, washed to be neutral and dried to obtain the modified porous calcium silicate.
(2) Respectively vacuum drying ASA, PC, modified porous calcium silicate, butyl tin trichloride, magnesium stearate and an antioxidant DNP, accurately weighing the dried components and stearic acid according to the weight percentage, then uniformly mixing the weighed components in a high-speed mixer to obtain a mixture, and carrying out melt extrusion on the mixture by a double-screw extruder to obtain blending particles, wherein the temperature of a charging barrel is 180, 195, 219, 234, 240 and 236 ℃ and the rotating speed of a screw is 80rpm.
(3) Extruding, shaping, traction and winding the blended particles prepared in the step (2) through a wire rod machine to obtain the 3D printing wire rod, wherein the temperature of a charging barrel is 180 ℃, 200, 215, 235, 240 and 235 ℃, and the rotating speed of a screw rod is 65rpm.
Further, the 3D printing wire obtained in the step (3) was subjected to 3D printing molding, and the VOC released amount (DB 35/1784-2018), the odor rating, the thermal expansion coefficient (GB/T2572-2005), the melt flow rate (GB/T3682.1-2018), the tensile strength (GB/T1040.2-2006) and the impact strength (GB/T1043.1-2008) during the 3D printing molding were measured, and the test results were shown in Table 1.
Example 4
The low VOC released ASA/PC3D printing wire comprises the following components in percentage by weight: 65% of ASA, 20% of PC, 11% of modified porous calcium silicate, 0.5% of monobutyl tin oxide, 1.8% of magnesium stearate, 0.3% of antioxidant 1010 and 1.4% of stearic acid.
A preparation method of ASA/PC3D printing wire with low VOC release comprises the following steps:
(1) The preparation method of the modified porous calcium silicate comprises the following steps:
A. 50g of porous calcium silicate is put into 1L of deionized water for ultrasonic dispersion for 2 hours, and 15ml of acetic acid is added under stirring;
B. then 10g of chitosan is added, and the mixture is reacted for 6 hours under the condition of stirring at room temperature, and then filtered, washed to be neutral and dried to obtain the modified porous calcium silicate.
(2) And respectively vacuum-drying ASA, PC, modified porous calcium silicate, monobutyl tin oxide, magnesium stearate and antioxidant 1010, accurately weighing the dried components and stearic acid according to the weight percentage ratio, then uniformly mixing the weighed components in a high-speed mixer to obtain a mixture, and carrying out melt extrusion on the mixture by a double-screw extruder to obtain blending particles, wherein the temperature of a charging barrel is 180, 195, 220, 235, 240 and 235 ℃ and the rotating speed of a screw is 150rpm.
(3) Extruding, shaping, traction and winding the blended particles prepared in the step (2) through a wire rod machine to obtain the 3D printing wire rod, wherein the temperature of a charging barrel is 180, 198, 216, 238, 240 and 236 ℃, and the rotating speed of a screw rod is 80rpm.
Further, the 3D printing wire obtained in the step (3) was subjected to 3D printing molding, and the VOC released amount (DB 35/1784-2018), the odor rating, the thermal expansion coefficient (GB/T2572-2005), the melt flow rate (GB/T3682.1-2018), the tensile strength (GB/T1040.2-2006) and the impact strength (GB/T1043.1-2008) during the 3D printing molding were measured, and the test results were shown in Table 1.
Example 5
The low VOC released ASA/PC3D printing wire comprises the following components in percentage by weight: 70% of ASA, 20% of PC, 7% of modified porous calcium silicate, 0.2% of dibutyl tin oxide, 1.5% of zinc stearate, 0.3% of antioxidant CA and 1% of silicone oil.
A preparation method of ASA/PC3D printing wire with low VOC release comprises the following steps:
(1) The preparation method of the modified porous calcium silicate comprises the following steps:
A. 30g of porous calcium silicate is put into 1L of deionized water to be dispersed for 1.5 hours by ultrasonic, and 10ml of acetic acid is added under stirring;
B. then 8g of chitosan is added, and the mixture is reacted for 4 hours under the condition of stirring at room temperature, and then filtered, washed to be neutral and dried to obtain the modified porous calcium silicate.
(2) Respectively vacuum drying ASA, PC, modified porous calcium silicate, dibutyl tin oxide, zinc stearate and antioxidant CA, accurately weighing the dried components and silicone oil according to the weight percentage, then uniformly mixing the weighed components in a high-speed mixer to obtain a mixture, and carrying out melt extrusion on the mixture by a double-screw extruder to obtain blended particles, wherein the temperature of a charging barrel is 180, 196, 220, 235, 240 and 235 ℃ and the rotating speed of a screw is 90rpm.
(3) Extruding, shaping, traction and winding the blended particles prepared in the step (2) through a wire rod machine to obtain the 3D printing wire rod, wherein the temperature of a charging barrel is 180 ℃, 200, 215, 236, 240 and 235 ℃, and the rotating speed of a screw rod is 35rpm.
Further, the 3D printing wire obtained in the step (3) was subjected to 3D printing molding, and the VOC released amount (DB 35/1784-2018), the odor rating, the thermal expansion coefficient (GB/T2572-2005), the melt flow rate (GB/T3682.1-2018), the tensile strength (GB/T1040.2-2006) and the impact strength (GB/T1043.1-2008) during the 3D printing molding were measured, and the test results were shown in Table 1.
Comparative example 1
According to the formulation of example 1, a 3D printing wire rod was prepared by melt extrusion and shaping traction without adding modified porous calcium silicate, and the wire rod was subjected to 3D printing and molding, and the VOC release amount (DB 35/1784-2018), the odor grade, the thermal expansion coefficient (GB/T2572-2005), the melt flow rate (GB/T3682.1-2018), the tensile strength (GB/T1040.2-2006) and the impact strength (GB/T1043.1-2008) during the 3D printing and molding were measured, and the test results are shown in Table 1.
Comparative example 2
According to the formulation composition of example 1, the modified porous calcium silicate is replaced by the porous calcium silicate in equal quantity (before modification of the invention), 3D printing wire rods are prepared through melt extrusion and shaping traction, the wire rods are subjected to 3D printing forming, and the VOC release amount (DB 35/1784-2018), the odor grade, the thermal expansion coefficient (GB/T2572-2005), the melt flow rate (GB/T3682.1-2018), the tensile strength (GB/T1040.2-2006) and the impact strength (GB/T1043.1-2008) in the 3D printing forming process are measured, and the test results are shown in Table 1.
Comparative example 3
According to the formulation of example 1, without adding monobutyl tin oxide, 3D printing wire is prepared by melt extrusion and shaping traction, 3D printing and molding are carried out on the wire, and the VOC release amount (DB 35/1784-2018), the odor grade, the thermal expansion coefficient (GB/T2572-2005), the melt flow rate (GB/T3682.1-2018), the tensile strength (GB/T1040.2-2006) and the impact strength (GB/T1043.1-2008) in the 3D printing and molding process are measured, and the test results are shown in Table 1.
TABLE 1 Material Performance test results
Remarks: the odor level was classified into three levels of stimulation, partial stimulation, no stimulation.
From the above table, it can be seen that: after the modified porous calcium silicate is added, the VOC release value of the material is obviously reduced, and the odor grade in the material forming process is obviously improved. Meanwhile, the thermal expansion coefficient of the material is obviously reduced, and the thermal stability and the dimensional stability of the material are effectively improved. In addition, the tensile strength and impact strength of the material are improved and the melt flow rate is maintained at a suitable level.
The above examples are not intended to limit the composition and preparation of the present invention, and any suitable changes or modifications made by those skilled in the art should be construed as not departing from the scope of the present invention.
Claims (6)
1. A low VOC released ASA/PC3D printing wire, characterized by: the modified porous calcium silicate comprises, by weight, 50-70% of ASA resin, 20-30% of PC resin, 5-15% of modified porous calcium silicate, 0.2-2% of a promoter, 0.2-2% of a heat stabilizer, 0.2-1% of an antioxidant and 0.2-2% of a lubricant, wherein the modified porous calcium silicate contains hydroxyl and amino groups, and the promoter comprises at least one of monobutyl tin oxide, dibutyl tin oxide, tributyl tin chloride and butyl tin trichloride;
the preparation method of the modified porous calcium silicate comprises the following steps: firstly, putting 20-50 g of porous calcium silicate into 1L deionized water, performing ultrasonic dispersion for 0.5-2 h, adding 5-20 ml of acetic acid under stirring, then adding 1-10 g of chitosan, reacting for 2-6 h under the condition of stirring at room temperature, filtering, washing to be neutral, and drying to obtain the modified porous calcium silicate.
2. A low VOC released ASA/PC3D printing wire according to claim 1, wherein: the heat stabilizer comprises at least one of calcium stearate, zinc stearate and magnesium stearate.
3. A low VOC released ASA/PC3D printing wire according to claim 1, wherein: the antioxidant comprises at least one of antioxidant DNP, antioxidant 1010 and antioxidant CA.
4. A low VOC released ASA/PC3D printing wire according to claim 1, wherein: the lubricant includes at least one of silicone oil, stearic acid, and paraffin wax.
5. The preparation method of the ASA/PC3D printing wire with low VOC release is characterized by comprising the following steps:
step 1: preparing modified porous calcium silicate: putting 20-50 g of porous calcium silicate into 1L deionized water, performing ultrasonic dispersion for 0.5-2 h, adding 5-20 ml of acetic acid under stirring, then adding 1-10 g of chitosan, reacting for 2-6 h under the condition of stirring at room temperature, filtering, washing to be neutral, and drying to obtain modified porous calcium silicate;
step 2: respectively vacuum drying ASA resin, PC resin, modified porous calcium silicate, accelerator, heat stabilizer and antioxidant, and weighing the dried components according to the following weight percentage: 50-70% of ASA resin, 20-30% of PC resin, 5-15% of modified porous calcium silicate, 0.2-2% of accelerator, 0.2-2% of heat stabilizer, 0.2-1% of antioxidant and 0.2-2% of lubricant, and then uniformly mixing the weighed components to obtain a mixture, and carrying out melt extrusion on the mixture by a double-screw extruder to obtain blending particles, wherein the temperature of a charging barrel is 180-240 ℃, and the rotating speed of a screw is 80-200 rpm; the accelerator comprises at least one of monobutyl tin oxide, dibutyl tin oxide, tributyl tin chloride and butyl tin trichloride;
step 3: and (3) extruding, shaping, traction and winding the blended particles prepared in the step (2) through a wire rod machine to obtain the 3D printing wire rod, wherein the temperature of a material cylinder is 180-240 ℃, and the rotating speed of a screw rod is 20-100 rpm.
6. The method for preparing the low-VOC released ASA/PC3D printing wire according to claim 5, wherein the method comprises the following steps: the heat stabilizer comprises at least one of calcium stearate, zinc stearate and magnesium stearate.
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Citations (5)
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