CN109535709A - High molecular polymer dusty material and preparation method thereof - Google Patents

High molecular polymer dusty material and preparation method thereof Download PDF

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Publication number
CN109535709A
CN109535709A CN201811331785.5A CN201811331785A CN109535709A CN 109535709 A CN109535709 A CN 109535709A CN 201811331785 A CN201811331785 A CN 201811331785A CN 109535709 A CN109535709 A CN 109535709A
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powder
high molecular
molecular polymer
carbon black
dusty material
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CN109535709B (en
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许小曙
文杰斌
李俭
侯帅
苏雪雪
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Hunan Farsoon High Tech Co Ltd
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Hunan Farsoon High Tech Co Ltd
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Priority to CN201811331785.5A priority Critical patent/CN109535709B/en
Publication of CN109535709A publication Critical patent/CN109535709A/en
Priority to EP19881933.6A priority patent/EP3878910A4/en
Priority to PCT/CN2019/111972 priority patent/WO2020093855A1/en
Priority to US17/292,244 priority patent/US20210403714A1/en
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    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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Abstract

The present invention provides a kind of preparation method of high molecular polymer dusty material, includes the following steps: for 10 parts of polymer material and engineerings and 0.1~5 part of carbon black to be added to progress first time high-speed stirred in agitator, macromolecule carbon black mixed-powder material is made；The macromolecule carbon black mixed-powder material, 0.1~1 part of flow promortor, 5~40 parts of thermal medium materials and 90 parts of polymer material and engineerings are added in mixed powder bucket, is sieved after carrying out second of high-speed stirred, high molecular polymer dusty material is made.By the way of high-speed stirred, carbon black is uniformly attached to the surface of high molecular polymer powder and thermal medium, so that polymeric powder in the prior art is sintered applied to optical fiber laser, article surface is high-quality, structure is finer, excellent combination property, tensile modulus is high, while expanding the type and application field of optical fiber laser agglomerated material.

Description

High molecular polymer dusty material and preparation method thereof
Technical field
The invention belongs to increases material manufacturing technology fields, and in particular to a kind of high molecular polymer dusty material and its preparation side Method.
Background technique
With laser selective being sintered and fusing multiple powder beds is a kind of method for manufacturing three-dimension object, and this method allows not Multiple overlapping layers of laser sintering powder need to be passed through, according to the 3-D image of object to be produced only using tool processes to obtain 3D solid.This method is mainly completed using thermoplastic polymer.Patent US6136948 and WO9606881 is to this use The method of polymer powder manufacture three-dimension object is described in detail.
The selective laser sintering of existing mainstream is mainly using being CO2Laser, wavelength 10600nm, it is corresponding in it is infrared Area's wave band.Silon powder material is higher to the wavelength absorption rate of the range in high molecular polymer, and other macromolecules are to this Wavelength absorption rate is poor, causes existing high molecular polymer is more difficult to be applied in Selective Laser Sintering.
A kind of scheme of optical fiber laser sintered nylon is mentioned in CN106626379A patent, nylon can not absorbing wavelength For the laser energy of 1064nm, the method using thermal medium is needed, improves nylon powder laser absorption rate.Because heat absorption is added to be situated between Matter, the thermal medium in nylon effectively absorb laser energy and pass to the polyamide powder for needing to fuse.Optical fiber laser can To use smaller laser facula, the manufacture for realizing polyamide three-dimension object using the laser of smaller focal beam spot is realized, is mentioned The high accuracy of manufacture.But if can not solve the problems, such as that thermal medium is uniformly mixed with high molecular polymer, it will lead to sintering table Face surface quality and surface difference can not also print fine structure.Simultaneously because thermal medium mixing is uneven, sintering is caused to be imitated Fruit stability is poor.Therefore, it is badly in need of developing a kind of with the heat absorption material that thermal medium and polymer material and engineering can be made to be uniformly mixed Material.
Summary of the invention
The present invention provides a kind of high molecular polymer dusty material and preparation method thereof, and stirring technique makes charcoal through the invention The black surface for being distributed in polymer material and engineering and thermal medium more evenly, enables polymer material and engineering and thermal medium to absorb light The visible light that fibre laser issues, so that the optical fiber laser sintering using lower-wattage prepares polymer composite material Workpiece.Pass through CO with existing2Laser direct irradiation high molecular polymer powder, it is straight that high molecular polymer powder absorbs laser energy It connects unlike fusion method, after the laser irradiation for receiving the wave band in this method on the high molecular polymer powder of irradiation area After the carbon black absorption fraction of laser light on high score polymer powder surface can measure higher temperature, then pass through heat transfer for energy transfer High molecular polymer powder is given, to realize the fusion of high molecular polymer powder.
Nylon resin dusty material is not only enabled to absorb the optical fiber laser energy of visible wavelength in this way, while can be with So that other high molecular polymer powder can also absorb, such as thermoplastic polyurethane resin powder, polypropylene powder resin, poly- second Olefine resin powder, ethylene-vinyl acetate copolymer resin powder, polyethersulfone resin powder, polyphenylene sulfide powder or polyethers Ether ketone resin powder.
The present invention provides a kind of preparation methods of high molecular polymer dusty material, which is characterized in that including walking as follows It is rapid:
10 parts of polymer material and engineerings and 0.1~5 part of carbon black are added to progress first time high-speed stirred in agitator, system Secure satisfactory grades sub- carbon black mixed-powder material；
By the macromolecule carbon black mixed-powder material, 0.1~1 part of flow promortor, 5~40 parts of thermal medium materials and 90 parts Polymer material and engineering is added in mixed powder bucket, sieves after carrying out second of high-speed stirred, and high molecular polymer dusty material is made.
As a further preferred embodiment of the present invention, the specific process parameter of the first time high-speed stirred are as follows: agitator Temperature is maintained at 30~40 DEG C, and stirring rate is 1500~2000r/min, and mixing time is 0.5~5min.Due to the grain of carbon black Diameter is smaller, and if directly individually breaing up carbon black, carbon black is difficult to disperse, it may occur that reunites, by by carbon black and polymeric powder material Material carries out first time high-speed stirred together, keeps carbon black and polymer material and engineering mixed distribution uniform.
As a further preferred embodiment of the present invention, the technique of second of high-speed stirred is divided into two stages:
First stage, mixed powder bucket temperature are maintained at 70~80 DEG C, and stirring rate is 1200~1500r/min, mixing time For 1~20min；By the heating and high-speed stirred in this stage, so that polymer material and engineering is uniformly broken up, electrostatic is eliminated, is mentioned Coverage rate of the high carbon black in polymeric powder and thermal medium.
Second stage, mixed powder bucket temperature are maintained at 30~40 DEG C, and stirring rate is 600~800r/min, mixing time 3 ~150min.By the environment of opposite first stage lower temperature and lower mixing speed, by being stirred for longer time, Carbon black, thermal medium are more uniform with polymer material and engineering mixing, the friction between polymer material and engineering are prevented, if in height In the environment of warm high speed, polymeric powder is easily broken or cracks, and influences the pattern of powder.
As a further preferred embodiment of the present invention, the average grain diameter of the carbon black is 60~100nm.Due to the grain of carbon black Diameter is excessive, poor adhesive force, will affect carbon black in the attachment on polymer material and engineering surface, and the flat of carbon black is limited in the present invention Equal partial size is 60~100nm, and short grained nano carbon black, specific surface power is big, and absorption laser energy is more, and heat absorption efficiency is more preferable.
As a further preferred embodiment of the present invention, the thermal medium is carbon fiber, and di-iron trioxide iron powder (is commonly called as iron It is red), ferroso-ferric oxide iron powder (is commonly called as iron oxide black), metal powder.
As a further preferred embodiment of the present invention, the metal powder is iron powder, aluminium powder, copper powder, tungsten powder, nickel powder, cobalt Powder, one or more of titanium valve.
As a further preferred embodiment of the present invention, the carbon black high molecular polymer powder surface coverage be 20~ 200%, the carbon black is 30~300% in thermal medium surface coverage.
As a further preferred embodiment of the present invention, the average grain diameter of the thermal medium is 10~45 μm
As a further preferred embodiment of the present invention, the average grain diameter of the high molecular polymer powder is 40~75 μm. In the particle size range for the high molecular polymer dusty material that the present invention limits, powder flowbility is good, can guarantee carbon black and thermal medium It is evenly distributed on polymeric powder surface.The partial size of high molecular polymer dusty material is too small to be easy to cause carbon black to reunite, thus Influence obtained powder sintered product mechanical property；The partial size of high molecular polymer dusty material is excessive to be easy to cause carbon black to cover Lid rate is small, laser energy absorption inefficient.
As a further preferred embodiment of the present invention, the polymer material and engineering is nylon resin powder, thermoplastic poly Urethane toner, polypropylene powder resin, polyethylene resin powder, ethylene-vinyl acetate copolymer resin powder, polyether sulfone Toner, polyphenylene sulfide powder or polyether-ether-ketone resin powder.Silon powder material is to this in high molecular polymer The wavelength absorption rate of range is higher, and other macromolecules are poor to the wavelength absorption rate, cause existing high molecular polymer is more difficult to answer It uses in Selective Laser Sintering, technique through the invention can expand the range of high molecular polymer dusty material.
As a further preferred embodiment of the present invention, the nylon resin powder be PA6, PA11, PA12, PA66, One or more of PA610, PA612, PA1010, PA1012, PA1212.
As a further preferred embodiment of the present invention, the flow promortor is fumed silica, gas phase aluminum oxide Or nano-titanium dioxide.
The present invention also provides a kind of high molecular polymer dusty materials, use above-mentioned high molecular polymer dusty material Preparation method is made, and the high molecular polymer dusty material is sintered suitable for optical fiber laser.
As a further preferred embodiment of the present invention, the laser power of the optical fiber laser is 30~1000W, laser light Spot size is 30~1500 μm, and laser scanning speed is 10~30m/s.
The present invention provides high molecular polymer dusty material and preparation method thereof, has the advantages that
(1) high-speed stirred technique through the invention, carbon black, thermal medium and high molecular polymer powder is evenly dispersed, It prevents carbon black to reunite, further increases the mobility of nylon polymer powder, carbon black is on nylon powder material surface Coverage rate is high.
(2) by the way that thermal medium and carbon black is added, the macromolecule that cannot absorb energy of lasers in the prior art can be made Polymer powder can be easy to absorb the energy of laser, preferably can prepare workpiece using optical fiber laser sintering, expand The material application type and application range of the technology.
(3) addition of thermal medium, the laser energy that visible wavelength not only can be absorbed make the more preferable of powder fusing, together When thermal medium play the role of enhancing, improve the mechanical strength and modulus of macromolecule polymer material, while polyphosphazene polymer The shock resistance for closing object dusty material can also can be more preferable.
Specific embodiment
Comparative example 1
Nylon 1212 poweder that (1) 100 part of average grain diameter is 60 μm, 1 part of fumed silica agent, 20 parts of average grain diameters are The carbon black that 40 μm of carbon fiber and 1 part of average grain diameter are 80nm is stirred mixing, obtains a kind of Buddhist nun of selective laser sintering Imperial 1212 powder.
Embodiment 1
(1) by 10 parts of average grain diameters be 60 μm nylon 1212 poweder and 1 part of average grain diameter be 60nm carbon black be added to It is stirred in agitator, stirring barrel temperature is maintained at 30 DEG C, stirring rate 2000r/min, mixing time 0.5min, system Obtain nylon 1212 carbon black mixed-powder；
(2) 10 parts of nylon 1212 carbon blacks mixed-powder, 1 part of fumed silica, 20 parts of average grain diameters are 40 μm Carbon fiber and 90 parts of nylon 1212 poweders are added in mixed powder bucket, and using sieving after the technique of high-speed stirred, average grain diameter is 60 μ M, high-speed stirred first stage, mixed powder bucket temperature are maintained at 70 DEG C, stirring rate 1500r/min, mixing time 2min；It is high Speed stirring second stage, mixed powder bucket temperature are maintained at 40 DEG C, stirring rate 800r/min, mixing time 3min and obtain one Kind nylon 1212 polymer powder materials.
Prepared nylon 1212 polymer powder materials are sintered using optical fiber laser, sintering workpiece sample is made Item is simultaneously tested for the property, and the results are shown in Table 1.
Embodiment 2
(1) the gross mass number of 6 powder of nylon and carbon black is 100 parts, 6 powder of nylon for being 40nm by 5 parts of average grain diameters The carbon black for being 60 with 0.1 part of average grain diameter, which is added in agitator, to be stirred, and stirring barrel temperature is maintained at 32 DEG C, stirring rate For 1600r/min, mixing time 1min, 6 carbon black mixed-powder of nylon is made；
(2) 10 parts of nylon, the 6 carbon black mixed-powder, 0.1 part of gas phase titanium dioxide, three that 5 parts of average grain diameters are 10 μm It aoxidizes two iron powders and 90 parts of 6 powder of nylon is added in mixed powder bucket, using sieving after the technique of high-speed stirred, average grain diameter is 40 μm, high-speed stirred first stage, mixed powder bucket temperature is maintained at 72 DEG C, stirring rate 1300r/min, and mixing time is 3min；High-speed stirred second stage, mixed powder bucket temperature are maintained at 33 DEG C, stirring rate 640r/min, mixing time 5min, Obtain a kind of nylon 6/poly conjunction object dusty material.
Object dusty material is closed to prepared nylon 6/poly using optical fiber laser to be sintered, and sintering workpiece batten is made And be tested for the property, it the results are shown in Table 1.
Embodiment 3
(1) by 20 parts of average grain diameters be 40 μm of thermoplastic polyurethane powders and 0.1 part of average grain diameter be 65nm carbon black be added It is stirred into agitator, stirring barrel temperature is maintained at 40 DEG C, stirring rate 1500r/min, mixing time 2min, system Obtain thermoplastic polyurethane carbon black mixed-powder；
(2) 20 parts of thermoplastic polyurethane carbon blacks mixed-powder, 0.1 part of meteorological aluminum oxide, 10 parts of average grain diameters It is added in mixed powder bucket for 15 μm of ferroferric oxide powders and 80 parts of thermoplastic polyurethane powders, using the technique of high-speed stirred After sieve, average grain diameter is 40 μm, the high-speed stirred first stage, and mixed powder bucket temperature is maintained at 80 DEG C, stirring rate is 1200 turns/ Min, mixing time 5min；High-speed stirred second stage, mixed powder bucket temperature are maintained at 30 DEG C, and stirring rate is 800 turns/min, Mixing time is 15min, obtains a kind of thermoplastic polyurethane polymer's dusty material.
Prepared thermoplastic polyurethane polymer's dusty material is sintered using optical fiber laser, agglomerant is made Part batten is simultaneously tested for the property, and the results are shown in Table 1.
Embodiment 4
It (1) is 45 μm of polypropylene powder resins by 20 parts of average grain diameters and 0.5 part of average grain diameter is that 70nm carbon black is added to It is stirred in agitator, stirring barrel temperature is maintained at 35 DEG C, stirring rate 1600r/min, mixing time 2min, is made Acrylic resin carbon black mixed-powder；
(2) 20 parts of acrylic resin carbon blacks mixed-powder, 0.2 part of meteorological silica, 15 parts of average grain diameters are 20 μ The iron powder of m and 80 parts of polypropylene powder resins are added in mixed powder bucket, using being sieved after the technique of high-speed stirred, average grain diameter It is 45 μm, high-speed stirred first stage, mixed powder bucket temperature is maintained at 70 DEG C, and stirring rate is 1300 turns/min, and mixing time is 8min；High-speed stirred second stage, mixed powder bucket temperature are maintained at 35 DEG C, and stirring rate is 760 turns/min, and mixing time is 30min obtains a kind of acrylic resin polymer powder materials.
Prepared acrylic resin polymer powder materials are sintered using optical fiber laser, sintering workpiece is made Batten is simultaneously tested for the property, and the results are shown in Table 1.
Embodiment 5
It (1) is 50 μm of polyethylene resin powders by 20 parts of average grain diameters and 1 part of average grain diameter is that 75nm carbon black is added to and stirs It mixes in bucket and is stirred, stirring barrel temperature is maintained at 36 DEG C, stirring rate 1700r/min, mixing time 3min, is made poly- Vinyl carbon black mixed-powder；
(2) 20 parts of polyvinyl resin carbon blacks mixed-powder, 0.3 part of fumed silica, 20 parts of average grain diameters are 25 μ The copper powders of m and 80 parts of polyethylene resin powders are added in mixed powder bucket, using being sieved after the technique of high-speed stirred, average grain diameter It is 50 μm, high-speed stirred first stage, mixed powder bucket temperature is maintained at 80 DEG C, and stirring rate is 1200 turns/min, and mixing time is 10min；High-speed stirred second stage, mixed powder bucket temperature are maintained at 30 DEG C, and stirring rate is 800 turns/min, and mixing time is 45min obtains a kind of polyvinyl resin polymer powder materials.
Prepared polyvinyl resin polymer powder materials are sintered using optical fiber laser, sintering workpiece is made Batten is simultaneously tested for the property, and the results are shown in Table 1.
Embodiment 6
It (1) is 65 μm of polyethersulfone resin powder by 20 parts of average grain diameters and 3 parts of average grain diameters are that 90nm carbon black is added to and stirs It mixes in bucket and is stirred, stirring barrel temperature is maintained at 40 DEG C, stirring rate 1900r/min, mixing time 4min, is made poly- Ether sulfone resin carbon black mixed-powder；
(2) 20 parts of polyethersulfone resin carbon blacks mixed-powder, 0.1 part of fumed silica, 25 parts of average grain diameters are 30 μ The nickel by powder of m and 80 parts of polyethersulfone resin powder are added in mixed powder bucket, using being sieved after the technique of high-speed stirred, average grain diameter It is 650 μm, high-speed stirred first stage, mixed powder bucket temperature is maintained at 80 DEG C, and stirring rate is 1200 turns/min, and mixing time is 14min；High-speed stirred second stage, mixed powder bucket temperature are maintained at 30 DEG C, and stirring rate is 800 turns/min, and mixing time is 60min obtains a kind of polyethersulfone resin polymer powder materials.
Prepared polyethersulfone resin polymer powder materials are sintered using optical fiber laser, sintering workpiece is made Batten is simultaneously tested for the property, and the results are shown in Table 1.
Embodiment 7
It (1) is 70 μm of polyphenylene sulfide powder by 20 parts of average grain diameters and 5 parts of average grain diameters are that 100nm carbon black is added to It is stirred in agitator, stirring barrel temperature is maintained at 40 DEG C, stirring rate 2000r/min, mixing time 5min, is made Polyphenylene sulfide carbon black mixed-powder；
(2) 20 parts of polyphenylene sulfide carbon blacks mixed-powder, 1 part of fumed silica, 30 parts of average grain diameters are 35 μ The cobalt dust of m and 80 parts of polyphenylene sulfide powder are added in mixed powder bucket, and using sieving after the technique of high-speed stirred, be averaged grain Diameter is 70 μm, the high-speed stirred first stage, and mixed powder bucket temperature is maintained at 75 DEG C, and stirring rate is 1200 turns/min, mixing time For 18min；High-speed stirred second stage, mixed powder bucket temperature are maintained at 40 DEG C, and stirring rate is 600 turns/min, and mixing time is 100min obtains a kind of polyphenylene sulfide resin polymer cosmetics powder material.
Prepared polyphenylene sulfide resin polymer cosmetics powder material is sintered using optical fiber laser, agglomerant is made Part batten is simultaneously tested for the property, and the results are shown in Table 1.
Embodiment 8
It (1) is 75 μm of polyether-ether-ketone resin powder by 20 parts of average grain diameters and 3 parts of average grain diameters are that 100nm carbon black is added to It is stirred in agitator, stirring barrel temperature is maintained at 30 DEG C, stirring rate 2000r/min, mixing time 5min, is made Polyether-ether-ketone resin carbon black mixed-powder；
(2) 20 parts of polyether-ether-ketone resin carbon blacks mixed-powder, 0.1 part of fumed silica, 40 parts of average grain diameters are 45 μm of tungsten powder and 80 parts of thermoplastic polyether ether ketone resin powder are added in mixed powder bucket, using sieving after the technique of high-speed stirred Point, average grain diameter is 75 μm, the high-speed stirred first stage, and mixed powder bucket temperature is maintained at 80 DEG C, and stirring rate is 1400 turns/min, Mixing time is 20min；High-speed stirred second stage, mixed powder bucket temperature are maintained at 35 DEG C, and stirring rate is 700 turns/min, is stirred Mixing the time is 150min, obtains a kind of polyether-ether-ketone resin polymer powder materials.
Prepared polyether-ether-ketone resin polymer powder materials are sintered using optical fiber laser, agglomerant is made Part batten is simultaneously tested for the property, and the results are shown in Table 1.
Table 1: using the performance parameter of the 3 d part of high molecular polymer dusty material of the present invention preparation.
Stirring technique through the invention, carbon black and high molecular polymer powder is evenly dispersed, it is therefore prevented that and carbon black is reunited, Carbon black is uniformly coated on the surface of polyamide powder, and carbon black is efficient to optical-fiber laser energy absorption.
By the way that thermal medium and carbon black is added, the high molecular polymerization that cannot absorb energy of lasers in the prior art can be made Object powder can be easy to absorb the energy of laser, preferably can prepare workpiece using optical fiber laser sintering, expand this The material application type and application range of technology.The addition of thermal medium, the laser energy that visible wavelength not only can be absorbed make Powder fusing it is more preferable, while thermal medium plays the role of enhancing, and the machinery for improving macromolecule polymer material is strong Degree and modulus, while high molecular shock resistance can also can be more preferable.
By addition carbon black, the high molecular polymer powder that cannot absorb energy of lasers in the prior art can be made, It can be easy to absorb the energy of laser, preferably can prepare workpiece using optical fiber laser sintering, expand the technology Material application type and application range, in an embodiment of the present invention, the laser power of optical fiber laser preferably 100~300W, Laser facula is 40~60 μm, and is carried out with cross section of the speed control laser of 10~25m/s or so to 3 d part Irradiation.After fusing under the irradiation of laser for one layer, Powder spreader is by the mixed powder of polyamide and carbon fiber in working face The thickness of 0.1mm is sent on upper berth, and laser continues to be irradiated cross section of the 3 d part on new bisque.It repeats above-mentioned Step is until obtain the 3 d part using the preparation of high molecular polymer dusty material, discovery is compared to using CO2Laser, three Dimension part performs better than at feature structure.

Claims (12)

1. a kind of preparation method of high molecular polymer dusty material, which comprises the following steps:
(1) 10 parts of polymer material and engineerings and 0.1~5 part of carbon black are added to progress first time high-speed stirred in agitator, system Secure satisfactory grades sub- carbon black mixed-powder material；
(2) by the macromolecule carbon black mixed-powder material, 0.1~1 part of flow promortor, 5~40 parts of thermal medium materials and 90 parts Polymer material and engineering is added in mixed powder bucket, sieves after carrying out second of high-speed stirred, and high molecular polymer dusty material is made.
2. the preparation method of high molecular polymer dusty material according to claim 1, which is characterized in that the first time The specific process parameter of high-speed stirred are as follows: stirring barrel temperature is maintained at 30~40 DEG C, and stirring rate is 1500~2000r/min, Mixing time is 0.5~5min.
3. the preparation method of high molecular polymer dusty material according to claim 2, which is characterized in that described second The technique of high-speed stirred is divided into two stages:
First stage, mixed powder bucket temperature are maintained at 70~80 DEG C, and stirring rate is 1200~1500r/min, and mixing time is 1~ 20min；
Second stage, mixed powder bucket temperature are maintained at 30~40 DEG C, and stirring rate is 600~800r/min, and mixing time is 3~ 150min。
4. the preparation method of high molecular polymer dusty material according to claim 3, which is characterized in that the carbon black Average grain diameter is 60~100nm.
5. the preparation method of high molecular polymer dusty material according to claim 4, which is characterized in that the thermal medium For carbon fiber, di-iron trioxide iron powder, ferroso-ferric oxide iron powder or metal powder.
6. the preparation method of high molecular polymer dusty material according to claim 5, which is characterized in that the carbon black exists High molecular polymer powder surface coverage is 20~200%, and the carbon black is 30~300% in thermal medium surface coverage.
7. the preparation method of high molecular polymer dusty material according to claim 6, which is characterized in that the thermal medium The average grain diameter of material is 10~45 μm.
8. the preparation method of high molecular polymer dusty material according to claim 7, which is characterized in that the macromolecule The average grain diameter of polymer powder materials is 40~75 μm.
9. the preparation method of high molecular polymer dusty material according to claim 8, which is characterized in that the macromolecule Dusty material is nylon resin powder, thermoplastic polyurethane resin powder, polypropylene powder resin, polyethylene resin powder, second Alkene-vinyl acetate copolymer resin powder, polyethersulfone resin powder, polyphenylene sulfide powder or polyether-ether-ketone resin powder.
10. the preparation method of high molecular polymer dusty material according to claim 9, which is characterized in that the nylon Toner is one or more of PA6, PA11, PA12, PA66, PA610, PA612, PA1010, PA1012, PA1212.
11. a kind of high molecular polymer dusty material, which is characterized in that use high score of any of claims 1-10 The preparation method of sub- polymer powder materials is made, and the high molecular polymer dusty material is sintered suitable for optical fiber laser.
12. the preparation method of high molecular polymer dusty material according to claim 11, which is characterized in that the optical fiber The laser power of laser is 30~1000W, and laser facula size is 30~1500 μm, and laser scanning speed is 10~30m/s.
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CN112247145A (en) * 2020-10-28 2021-01-22 湖南华曙高科技有限责任公司 Indirect forming method and equipment for preparing metal parts
CN112264619A (en) * 2020-10-28 2021-01-26 湖南华曙高科技有限责任公司 Indirect forming method for preparing metal product
CN112276111A (en) * 2020-10-28 2021-01-29 湖南华曙高科技有限责任公司 High-layer thick low-temperature sintering method and equipment for selective laser sintering
CN112454891A (en) * 2020-10-28 2021-03-09 湖南华曙高科技有限责任公司 Method and equipment for manufacturing high-toughness workpiece
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