CN108192360A - A kind of dental selective laser sintering 3D printing wax powder and preparation method thereof - Google Patents
A kind of dental selective laser sintering 3D printing wax powder and preparation method thereof Download PDFInfo
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- CN108192360A CN108192360A CN201711476414.1A CN201711476414A CN108192360A CN 108192360 A CN108192360 A CN 108192360A CN 201711476414 A CN201711476414 A CN 201711476414A CN 108192360 A CN108192360 A CN 108192360A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/017—Additives being an antistatic agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention belongs to special wax and 3D printing field of material technology, disclose a kind of dental selective laser sintering 3D printing wax powder and preparation method thereof.Wax powder of the present invention is made of basic wax powder and additive；The basic wax powder includes the component of following mass fraction：Pertroleum wax 50~70%, animal wax 0~15%, mineral wax or mineral derived wax 10~20%, vegetable wax 20~30%, toughener 0~5%, PE waxes 0~10%, color 0~10 ‰, surfactant 0~10 ‰；Or：Pertroleum wax 40~60%, animal wax 15~30%, mineral wax or mineral derived wax 0~10%, vegetable wax 0~20%, toughener 5~10%, PE waxes 10~20%, color 0~10 ‰, surfactant 0~10 ‰.Dental selective laser sintering 3D printing wax powder agglutinating property of the present invention, formability is good, hardness is moderate, kinematic viscosity is low, plasticity is strong, and physical property improves notable.
Description
Technical field
The invention belongs to special wax and 3D printing field of material technology, more particularly to a kind of dental selective laser sintering
3D printing wax powder and preparation method thereof.
Background technology
Rapid shaping (RP) and rapid shaping and manufacturing technology that reverse engineering (RE) is core since 20 world eighties
The product design and manufacture for being virtualize 3 dimensionizations, high-speeding, which provides new way for the development of Prosthodontics, but
It is because gathered data precision and rapid shaping machining accuracy are insufficient, is chiefly used in Maxillofacial defect reparation in oral cavity restoration field.
The one kind of 3D as printing speed technology, but its exclusive technology is superior to other printing speed modes, receives all the time each
Popularization, the innovation of a industry.3D printing techniques are one of core technologies of manufacturing industry transition and upgrade.3D printing is applied to dentistry
Field also attracts attention always.
Revolutionary new material leads global technology to reform always, pushes the manufacturing transition of new high-tech enterprise and upgrading,
However China's capability of independent innovation is insufficient in terms of playing forward position new material and leading industry development, there is an urgent need to 3D printing materials
New material.《Made in China 2025》In explicitly pointed out development 3D printing material importance.Selective laser sintering and moulding skill
Art (Slective laser sintering, SLS) is a kind of printing type relatively common and important in 3D printing techniques,
By digital control system can direct sintering wax powder make wax pattern, without mid-module convert, simplify making step.But existing market
Upper SLS is mainly for commercial Application, and many performances are close with resin material, but clinical oral often uses instrument refine, it is desirable to often
Wax is easily removed in rule water-bath.
Dental wax belongs to special wax field, and special wax primary raw material is pertroleum wax, and China as producing and go out in the world
The most country of mouth pertroleum wax, annual output account for about the 37% of Gross World Product, and export volume reaches the 47% of world's total amount, is China
Special wax development, exploitation and application starting evening are required for a large amount of imports or capture weight by special wax enterprise to China of foreign countries every year
Want market, it is external using domestic paraffin for raw material completion secondary operation after to export China back at high price.Special wax has very in China
The raw materials market of advantage.Population base of China is big, and dental wax market is big, but domestic dentistry wax relies on substantially import, in
High-end dental wax is held completely by external product
Wax is introduced into SLS moulding materials starting evening, and relevant documents and materials are very deficient, although having several units both at home and abroad
Carry out the R＆D work of SLS molding wax materials, but can put into production, the laser sintering and moulding wax powder quantity applied it is few.
Patent CN104693579A, which is disclosed, to be matched by the wax powder base-material of double size gradings and adds stearic acid, is white carbon, carbon black, short
Carbon fiber is cut to prepare a kind of method of the composite modified wax powder of laser sintered 3D printing, patent CN1326828A discloses one
Kind is that the low melting point power applications for laser sintering fast forming precisely casting wax mold prepared by raw material are cast in precision using polyethylene
Field is made, but this kind of wax powder sexual incompatibility is applied to dental casting wax field.
The thermo-responsive degree of conventional dental wax is high, and formed precision is poor, and the preparation of powder is also very difficult, it is impossible to satisfaction be made and burn
Knot requires the wax powder of grain size, is not suitable for laser sintering and moulding.
Laser sintering and moulding has unique superiority and good prospect in oral medical field, but currently on the market
The laser sintering and moulding wax powder for meeting dental field and application needs is very few so that the superiority of SLS cannot be complete in the field
It shows entirely.Exploitation dental selective laser sintering and moulding wax powder not only can further push the development of dental field,
Larger economic benefit can be generated, is had a very important significance.
Invention content
In order to overcome the shortcomings and deficiencies of the prior art described above, primary and foremost purpose of the invention is to provide a kind of dental choosing
The laser sintered 3D printing wax powder of selecting property.
Another object of the present invention is to provide a kind of preparation side of above-mentioned dental selective laser sintering 3D printing wax powder
Method.
The purpose of the present invention is realized by following proposal：
The purpose of the present invention is achieved through the following technical solutions.
A kind of dental selective laser sintering 3D printing wax powder, is made of basic wax powder and additive；
The basic wax powder includes the component of following mass fraction：Pertroleum wax 50~70%, animal wax 0~15%, ore deposit
Object wax or mineral derived wax 10~20%, vegetable wax 20~30%, toughener 0~5%, PE waxes 0~10%, color 0~
10 ‰, surfactant 0~10 ‰；
Or the basic wax powder includes the component of following mass fraction：Pertroleum wax 40~60%, animal wax 15~
30%th, mineral wax or mineral derived wax 0~10%, vegetable wax 0~20%, toughener 5~10%, PE waxes 10~20%, color
0~10 ‰, surfactant 0~10 ‰.
It is subject to basic wax powder quality, the additive includes 0~5 ‰ antistatic agents, 0~10 ‰ ultraviolet radiation absorptions
Agent, 0~10 ‰ antioxidant etc..
The additive can also include additive commonly used in the art, such as colorant.
The pertroleum wax can be 682# microwaxes, 70# microwaxes, 80# microwaxes, 85# microwaxes, 52# full refining stones
In wax, 54# fully refined paraffin wax, 58# fully refined paraffin wax, 62# fully refined paraffin wax, 64# fully refined paraffin wax, 66# fully refined paraffin wax
It is one or more kinds of.
The animal wax can be the one or more in beeswax, lanolin, spermaceti.
The mineral wax or mineral derived wax can be the one or more in lignite wax, ceresine, smart ceresine, S waxes.
The vegetable wax can be：One or more in candelila wax, Kalarba wax, rice bran wax, haze tallow.
The toughener can be low-molecular polypropylene, polyisobutene, EVA, ethylene-propylene copolymer, polystyrene-fourth
Two thermoplastic olefinic elastomers, ethylene-octene block copolymer, one kind in AFFINITY polyolefin plastomer resins or it is a kind of with
On.
The surfactant can be neopelex, sodium sulfonate, dioctyl succinate disulfonate acid, alkyl ether
One or more in carboxylate, alkyl trimethyl ammonium salt, alkyl dimethyl benzyl ammonium salt etc..
The releasing agent is preferably zinc stearate.
The antistatic agent is antistatic agent commonly used in the art, such as can be stearamide propyl-β-carboxylic
Ethyl-dimethyl ammonium dihydrogen phosphate, ECH antistatic agents, octadecyltrimethylammonium chloride, octadecyldimethyl quaternary ammonium nitric acid
One or more in salt etc..
The antioxidant be antioxidant commonly used in the art, such as can be antioxidant 1010, antioxidant 264,
Antioxidant 1076, irgasfos 168, antioxidant 300 one or more therein.
The ultra-violet absorber is ultra-violet absorber commonly used in the art, such as can be ultraviolet radiation absorption
Agent uv531, ultraviolet absorbent uv-9,770 one or more therein of ultra-violet absorber.
The present invention also provides a kind of preparation method of above-mentioned dental selective laser sintering 3D printing wax powder, including following
Step：Pertroleum wax, animal wax, mineral wax or mineral derived wax, vegetable wax, toughener, PE waxes, color are added to reaction kettle
In, heating stirring cools down, and crushes, and obtains original washing powder into powder by mechanical low-temperature Freezing smashing method, the lower spraying of stirring adds in surface and lives
Property agent solution, vacuum drying, obtain basic wax powder；Basic wax powder, additive are mixed evenly, obtain dental selectivity
Laser sintered 3D printing wax powder.
30~60min of insulated and stirred after the preferred heating stirring to material melts of heating stirring.
The temperature of the heating stirring is 90~100 DEG C.
The original washing powder adds surfactant after preferably carrying out 200-300 mesh screenings.
The surfactant solution, which refers to surfactant being dissolved in organic solvent, to be used further to prepare.
The present invention is had the following advantages and advantageous effect relative to the prior art：
It is pioneering that the present invention only prepares dental selective laser sintering 3D printing wax powder by wax class raw material of pertroleum wax.This
Invention prepares that dental laser sintering and moulding wax powder agglutinating property, formability is good, hardness is moderate, kinematic viscosity is low, plasticity is strong, object
Property is significantly better than the domestic dental casting Wax particles with commercial type.Dental selective laser sintering 3D prepared by the present invention
Printing wax powder overcomes easily agglomerating and Electrostatic Absorption determine in printing.The present invention prepares dental selective laser sintering
3D printing wax powder grain size meets laser sintered demand at 25~50 μm.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but the implementation of the present invention is not limited to this.
Material involved in the following example can be obtained from commercial channel.
Examination criteria is：
The measure cooling curve method of fusing point-GB/T 2539-2008 pertroleum wax fusing points；
Kinematic viscosity-GB/T 265-1988 oil product kinematic viscosity measuring methods and dynamic viscosity calculating method；
Needle penetration-GB/T 4985-2010 pertroleum wax penetration test methods；
Ash content-YY 0496-2004 dental casting waxes.
Embodiment 1
A kind of dental selective laser sintering 3D printing wax powder, is prepared by following methods：By 682# microwaxes
(42%), 58# full refinings wax (surplus, about 14.5%), PE waxes (4%), S waxes (15%), Kalarba wax (21%), color
(3 ‰) put into heating stirring in 100 DEG C of reaction kettles, continue heating stirring 30min after all substances fusing, release, cooling,
Then it is crushed to obtain blended wax A with powder machine.Blended wax A is placed in cold cooling unit and is cooled to -190 DEG C, mechanical crushing
Then Cheng Fen is stirred in batch mixer, neopelex (5%, surfactant is first dissolved in organic solvent) of gradually spraying,
300 mesh sieve is crossed after vacuum drying, obtains basic wax powder B.
Basic wax powder B is placed in Double cone mixer, is then respectively adding octadecyldimethyl quaternary ammonium nitrate
(5 ‰), ultraviolet absorbent uv-9 (5 ‰), antioxidant 1010 (3 ‰), batch mixing uniformly cross 300 mesh sieve, obtain dental and swash afterwards
Light sinter molding wax powder.
The total mass fraction of each component is 100% in the above method.
Embodiment 2
A kind of dental selective laser sintering 3D printing wax powder, is prepared by following methods：By 70# microwaxes
(57%), (about 5%) surplus, ceresine (18.5%), refined lignite wax (19.5%) color (3 ‰), puts into 100 DEG C to EVA
Heating stirring in reaction kettle, continues heating stirring 30min after all substances fusing, releases, then cooling is crushed with powder machine
Obtain blended wax A.Blended wax A is placed in cold cooling unit and is cooled to -190 DEG C, mechanical crushing is into powder, then in batch mixer
Stirring, neopelex (6.5 ‰, surfactant is first dissolved in organic solvent) of gradually spraying, crosses 300 after vacuum drying
Mesh sieves, and obtains basic wax powder B.
Basic wax powder B is placed in Double cone mixer, is then respectively adding octadecyldimethyl quaternary ammonium nitrate
(5 ‰), ultraviolet absorbent uv-9 (4.5 ‰), antioxidant 1010 (4.5 ‰), batch mixing uniformly cross 300 mesh sieve, obtain dentistry afterwards
With laser sintering and moulding wax powder.
The total mass fraction of each component is 100% in the above method.
Embodiment 3
A kind of dental selective laser sintering 3D printing wax powder, is prepared by following methods：By 58# full refining waxes
(14.5%), 682# microwaxes surplus (about 31.5%), EVA (4%), beeswax (10.5%), ceresine (10%), Kalarba wax
(29.5%), color (3 ‰), put into heating stirring in 100 DEG C of reaction kettles, continue heating stirring after all substances melting
30min is released, then cooling is crushed to obtain blended wax A with powder machine.Blended wax A is placed in cold cooling unit and is cooled down
To -190 DEG C, then mechanical crushing is stirred in batch mixer into powder, and neopelex of gradually spraying (8 ‰, surface-active
Agent is first dissolved in organic solvent), 300 mesh sieve is crossed after vacuum drying, obtains basic wax powder B.
Basic wax powder B is placed in Double cone mixer, is then respectively adding octadecyldimethyl quaternary ammonium nitrate
(5 ‰), ultraviolet absorbent uv-9 (5 ‰), antioxidant 1010 (3 ‰), batch mixing uniformly cross 300 mesh sieve, obtain dental and swash afterwards
Light sinter molding wax powder.
The total mass fraction of each component is 100% in the above method.
Embodiment 4
A kind of dental selective laser sintering 3D printing wax powder, is prepared by following methods：By 58# full refining waxes
(52%), (about 10%) surplus, beeswax (23%), EVA (5%), PE waxes (10%), color (3 ‰), puts into 100 to ceresine
Heating stirring in DEG C reaction kettle, continues heating stirring 30min after all substances fusing, releases, then cooling is crushed with powder machine
Obtain blended wax A.Blended wax A is placed in cold cooling unit and is cooled to -175 DEG C, mechanical crushing is into powder, then batch mixer
Middle stirring, gradually spraying, (surfactant is first dissolved in organic solvent to neopelex, and quality is than blended wax A：Dodecane
Base benzene sulfonic acid sodium salt=1000:3.5) 300 mesh sieve, is crossed after vacuum drying, obtains basic wax powder B.
Basic wax powder B is placed in Double cone mixer, is then respectively adding octadecyldimethyl quaternary ammonium nitrate
(5.5 ‰), ultraviolet absorbent uv-9 (4.5 ‰), antioxidant 1010 (3 ‰), batch mixing uniformly cross 300 mesh sieve, obtain dentistry afterwards
With laser sintering and moulding wax powder.
The total mass fraction of each component is 100% in the above method.
Embodiment 5
A kind of dental selective laser sintering 3D printing wax powder, is prepared by following methods：By 682# microwaxes
(45%), beeswax (about 20%), Kalarba wax (20%), EVA (5%), PE waxes (10%), color (3 ‰), put by surplus
Heating stirring in 100 DEG C of reaction kettles continues heating stirring 30min after all substances fusing, cooling is released, then with powder machine powder
It is broken to obtain blended wax A.Blended wax A is placed in cold cooling unit and is cooled to -180 DEG C, mechanical crushing is into powder, then batch mixing
It is stirred in machine, gradually spraying, (surfactant is first dissolved in organic solvent to neopelex, and quality is than blended wax A：12
Sodium alkyl benzene sulfonate=1000:3) 300 mesh sieve, is crossed after vacuum drying, obtains basic wax powder B.
Basic wax powder B is placed in Double cone mixer, is then respectively adding octadecyldimethyl quaternary ammonium nitrate
(4 ‰), ultraviolet absorbent uv-9 (3 ‰), antioxidant 1010 (3.5 ‰), batch mixing uniformly cross 300 mesh sieve, obtain dental afterwards
Laser sintering and moulding wax powder.
The total mass fraction of each component is 100% in the above method.
Embodiment 6
A kind of dental selective laser sintering 3D printing wax powder, is prepared by following methods：By 70# microwaxes
(30%), 56# fully refined paraffin wax (surplus, about 22%), beeswax (15%), Kalarba wax (20%), ceresine (10%), EVA
(8%), PE waxes (15%), color (3 ‰), put into heating stirring in 100 DEG C of reaction kettles, continue to heat after all substances fusing
30min is stirred, cooling is released, is then crushed to obtain blended wax A with powder machine.Blended wax A is placed in cold in cold cooling unit
But -180 DEG C are arrived, then mechanical crushing stirs, neopelex (surfactant of gradually spraying into powder in batch mixer
Organic solvent is first dissolved in, quality is than blended wax A：Neopelex=1000:3) 300 mesh sieve, is crossed after vacuum drying, is obtained
To basic wax powder B.
Basic wax powder B is placed in Double cone mixer, is then respectively adding octadecyldimethyl quaternary ammonium nitrate
(4 ‰), ultraviolet absorbent uv-9 (4.5 ‰), antioxidant 1010 (4.5 ‰), batch mixing uniformly cross 300 mesh sieve, obtain dentistry afterwards
With laser sintering and moulding wax powder.
The total mass fraction of each component is 100% in the above method.
Control group：Commercially available 2 kinds are taken to originate from TaiWan, China, Japanese high-end dental casting wax (particle) respectively, respectively
Control group 1, control group 2, measure respectively, and are compared with embodiment.
Examples 1 to 5 and 1~2 specific detection parameters of control group such as table 1.By table 1 as it can be seen that the dental selection of the present invention
The laser sintered 3D printing wax powder fusing point of property, hardness are moderate, while ash content and kinematic viscosity are low, have both good ductility and sintering
Property, there is good performance with control group dentistry wax comparison surface wax powder.
The performance of 1 dental selective laser sintering 3D printing wax powder of table
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (10)
1. a kind of dental selective laser sintering 3D printing wax powder, it is characterised in that be made of basic wax powder and additive；
The basic wax powder includes the component of following mass fraction：Pertroleum wax 50~70%, animal wax 0~15%, mineral wax
Or mineral derived wax 10~20%, vegetable wax 20~30%, toughener 0~5%, PE waxes 0~10%, color 0~10 ‰, surface
Activating agent 0~10 ‰；
Or the basic wax powder includes the component of following mass fraction：Pertroleum wax 40~60%, animal wax 15~30%, mineral
Wax or mineral derived wax 0~10%, vegetable wax 0~20%, toughener 5~10%, PE waxes 10~20%, color 0~10 ‰, table
Face activating agent 0~10 ‰.
2. dental selective laser sintering 3D printing wax powder according to claim 1, it is characterised in that：With basic wax powder
Subject to quality, the additive includes 0~5 ‰ antistatic agents, 0~10 ‰ ultra-violet absorbers, 0~10 ‰ antioxidant.
3. dental selective laser sintering 3D printing wax powder according to claim 1, it is characterised in that：The oil
Wax is 682# microwaxes, 70# microwaxes, 80# microwaxes, 85# microwaxes, 52# fully refined paraffin wax, 54# fully refined paraffin wax, 58#
One or more in fully refined paraffin wax, 62# fully refined paraffin wax, 64# fully refined paraffin wax, 66# fully refined paraffin wax.
4. dental selective laser sintering 3D printing wax powder according to claim 1, it is characterised in that：The animal
Wax is beeswax, the one or more in lanolin, spermaceti.
5. dental selective laser sintering 3D printing wax powder according to claim 1, it is characterised in that：The mineral
Wax or mineral derived wax are lignite wax, the one or more in ceresine, smart ceresine, S waxes.
6. dental selective laser sintering 3D printing wax powder according to claim 1, it is characterised in that：The plant
Wax is：One or more in candelila wax, Kalarba wax, rice bran wax, haze tallow.
7. dental selective laser sintering 3D printing wax powder according to claim 1, it is characterised in that：The toughening
Agent is low-molecular polypropylene, polyisobutene, EVA, ethylene-propylene copolymer, styrene-butadiene thermoplastic elastomer (TPE), second
One or more in alkene-octene block copolymer, AFFINITY polyolefin plastomer resins.
8. dental selective laser sintering 3D printing wax powder according to claim 1, it is characterised in that：The surface
Activating agent is neopelex, sodium sulfonate, dioctyl succinate disulfonate acid, alkyl ether carboxy acid salt, alkyl trimethyl ammonium
One or more in salt, alkyl dimethyl benzyl ammonium salt；The releasing agent is zinc stearate.
9. a kind of preparation method of claim 1~8 any one of them dental selective laser sintering 3D printing wax powder,
It is characterized in that including the following steps：By pertroleum wax, animal wax, mineral wax or mineral derived wax, vegetable wax, toughener, PE waxes, color
Cream is added in reaction kettle, heating stirring, is cooled down, and is crushed, original washing powder is obtained into powder by mechanical low-temperature Freezing smashing method, under stirring
Spraying adds in surfactant solution, and vacuum drying obtains basic wax powder；Basic wax powder, additive are mixed evenly, obtained
To dental selective laser sintering 3D printing wax powder.
10. the preparation method of dental selective laser sintering 3D printing wax powder according to claim 9, feature exist
In：The temperature of the heating stirring is 90~100 DEG C.
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| CN110079099A (en) * | 2019-03-26 | 2019-08-02 | 合肥卓越义齿制作有限公司 | A kind of preparation method of the environmentally friendly Wax particles of dental casting |
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| CN109435559A (en) * | 2018-11-06 | 2019-03-08 | 广州市德馨蜡制品有限公司 | Fingerprint wax and its preparation method and application |
| CN109438999A (en) * | 2018-11-30 | 2019-03-08 | 广州市德馨蜡制品有限公司 | Based on MJP technology dental 3D printing wax material and preparation method thereof |
| CN109438999B (en) * | 2018-11-30 | 2021-05-07 | 广州市德馨蜡制品有限公司 | Dental 3D printing wax material based on MJP technology and preparation method thereof |
| CN110079099A (en) * | 2019-03-26 | 2019-08-02 | 合肥卓越义齿制作有限公司 | A kind of preparation method of the environmentally friendly Wax particles of dental casting |
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Application publication date: 20180622 |