High-shading-performance polycarbonate wire suitable for fused deposition and preparation method thereof

A polycarbonate, fused deposition technology, applied in the field of additive manufacturing, can solve the problems of difficult to meet the toughness of the wire, melting temperature, viscosity, mechanical properties, complicated processes, low impact resistance, etc., to shorten the research and development cycle and Production cost, simple operation process, and the effect of improving toughness

Active Publication Date: 2017-09-29
GUANGDONG SILVER AGE SCI & TECH CO LTD
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AI-Extracted Technical Summary

Problems solved by technology

The traditional preparation of high light-shielding PC material parts uses pellets and is molded by mold. This method has a long forming cycle, cumbersome and complicated process, low impact resistance and high cost.
In addition, at this stage, it is generally used to fill a large amount of titanium dioxide to realize the shading of PC materials, and the addition amount exceeds 18%. However, the i...
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Abstract

The invention belongs to the technical field of additive manufacturing, and discloses a high-shielding-performance polycarbonate wire suitable for fused deposition and a preparation method thereof. The method comprises the following steps: (1) performing ball milling on polycarbonate powder, titanium dioxide, a flow promotor, a toughening agent, a lubricating agent, an antioxidant and an ultraviolet absorbent according to a predetermined mass percentage to obtain mixed powder; (2) heating the mixed powder to a fused state in order to prepare the high-shielding-performance polycarbonate wire. The invention further relates to a high-shielding-performance polycarbonate wire prepared by the preparation method of the high-shielding-performance polycarbonate wire suitable for fused deposition. The preparation method is simple in preparation process, and has higher flexibility; the prepared high-shielding-performance polycarbonate wire has higher toughness and higher impact resistance.

Application Domain

Technology Topic

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  • High-shading-performance polycarbonate wire suitable for fused deposition and preparation method thereof

Examples

  • Experimental program(7)

Example Embodiment

[0024] see figure 1 , the preparation method of the high light-shielding polycarbonate filament material suitable for fusion deposition provided by the preferred embodiment of the present invention, the preparation method mainly includes the following steps:
[0025] Step 1, ball milling polycarbonate powder, titanium dioxide, flow aid, toughening agent, lubricant, antioxidant and ultraviolet absorber according to a predetermined mass percentage to obtain a mixed powder. Specifically, the polycarbonate powder, the titanium dioxide, the flow aid, the toughening agent, the lubricant, the antioxidant and the ultraviolet absorber are weighed according to a predetermined mass percentage and pour it into a ball mill jar, and then add a certain amount of balls into the ball mill jar to perform ball milling to obtain a uniformly dispersed mixed powder. In this embodiment, the mass percentage of the polycarbonate powder is 49-78%; the mass percentage of the titanium dioxide is 9-13%; the mass percentage of the flow aid is 10-18%; The mass percentage of the toughening agent is 2-13%; the mass percentage of the lubricant is 0.1-1.0%; the mass percentage of the antioxidant is 0.5-3.0%; the mass percentage of the ultraviolet absorber is 0.5-3.0% .
[0026] The flow aid is one of polybutylene terephthalate (PBT), polyethylene terephthalate (PET) and acrylonitrile-butadiene-styrene copolymer (ABS) materials One or a combination of several, which is used to improve the viscosity of the wire material during FDM processing and the wire drawing shape during the melting process. The mass percentage of the titanium dioxide is less than the traditional 18%, which is used to improve the heat and impact resistance of the wire. The antioxidant is one or a combination of three (2,4-di-tert-butylphenyl) phosphite (antioxidant 168) and triphenyl phosphite (antioxidant TPPI), which not only makes The wire has anti-oxidation characteristics, and can also improve the thermal stability of the wire during thermal processing. The toughening agent is one or more combinations of acrylic rubber copolymer (A-662R, A-663, A-664 type toughening agent) and HHB-E009 type toughening polyester, which can Reduce brittleness, increase toughness, improve wire strength and processability. The lubricant is one or a combination of soaps, stearyl stearate, montan ceric acid soap and paraffin materials, which can reduce the friction between material components and between materials and single-screw extrusion. The friction between the contact surfaces of the machine can reduce the flow resistance and viscosity of the melt, and improve the fluidity of the melt. The ultraviolet absorber is benzotriazoles (UV-5411), 2-(4,6-diphenyl-1,3,5-triazine-2)-5-n-hexaneoxyphenol (UV- 1577) or a combination of two, which can strongly absorb ultraviolet light, and has good chemical stability and low price.
[0027] In this embodiment, the ball milling method is used to uniformly mix the components of the wire, wherein the ratio of the mass of the ball to the mass of the high light-shielding polycarbonate powder (the sum of the components of the high light-shielding polycarbonate wire) 0.3~0.8, the ball milling speed is 150~300r/min, and the ball milling time is 120~240min.
[0028] Step 2, heating the mixed powder to a molten state to prepare high light-shielding polycarbonate filaments. Specifically, after the mixed powder is heated to a molten state, the aperture of the final wire outlet is controlled by a single-screw extruder to obtain a high light-shielding polycarbonate wire; wire processing parameters: the temperature of the solid delivery area is 120 ~170°C; plasticizing zone temperature is 190-290°C; barrel vacuum is 0.07-0.10MPa; output zone temperature is 160-270°C; screw speed is 18-35r/min. In this embodiment, the diameter of the high light-shielding polycarbonate filament controlled by the single-screw extruder is 1.7 mm to 3 mm.

Example Embodiment

[0030] Example 1
[0031] The preparation method of the highly light-shielding polycarbonate filament material suitable for fusion deposition provided by embodiment 1 comprises the following steps:
[0032] (11) Preparation of high light-shielding PC powder: Weigh 780g PC powder, 90g titanium dioxide, 100g PBT flow aid, 20g A-662R toughening agent, 1g stearyl stearate and paraffin mixed lubricant, 5g antioxidant 168 and the ultraviolet absorber of 5g UV-5411 type are prepared into 1000g composite powder altogether, then described composite powder is poured in the ball mill jar, and in described ball mill jar, add 800g ball, on ball mill with Ball mill at a speed of 200r/min for 120min to obtain a uniformly dispersed mixed powder.
[0033] (12) Wire forming: the mixed powder obtained in step (11) is heated to a molten state and then passed through a single-screw extruder with a solid delivery zone temperature of 120°C, a plasticizing zone temperature of 210°C, and a barrel vacuum The diameter of the final wire outlet is controlled by the processing parameters of 0.07MPa, output zone temperature of 160°C, and screw speed of 18r/min to obtain a high-shade polycarbonate wire with a diameter of 2mm.

Example Embodiment

[0034] Example 2
[0035] The preparation method of the highly light-shielding polycarbonate filament material suitable for fusion deposition provided by embodiment 2 comprises the following steps:
[0036] (21) Preparation of high light-shielding PC powder: Weigh 700g PC powder, 120g titanium dioxide, 120g PET flow aid, 40g HHB-E009 toughening agent for toughened polyester, 5g montan wax acid soap ester lubricant, The ultraviolet absorber of 10g antioxidant TPPI and 5gUV-1577 type, to be prepared into 1000g composite powder, then described composite powder is poured in the ball mill jar, and in described ball mill jar, add 700g ball, on the ball mill with rotating speed 150r/min ball milling for 240min to obtain a uniformly dispersed mixed powder.
[0037] (22) Wire forming: the mixed powder obtained in step (21) is heated to a molten state and then passed through a single-screw extruder with a temperature of 130°C in the solid conveying zone, a temperature of 220°C in the plasticizing zone, and a vacuum degree of the cylinder. The processing parameters of 0.08MPa, output zone temperature of 250°C, and screw speed of 30r/min were used to control the aperture diameter of the final wire exit, and a high-shading polycarbonate wire with a diameter of 1.8mm was obtained.
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PUM

PropertyMeasurementUnit
Diameter2.0mm
Diameter1.8mm
Diameter3.0mm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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Owner:天津市康库得机电技术有限公司
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