CN106589419A - Glass fiber reinforced polypropylene resin powder for selective laser sintering and preparation thereof - Google Patents
Glass fiber reinforced polypropylene resin powder for selective laser sintering and preparation thereof Download PDFInfo
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- CN106589419A CN106589419A CN201510671064.9A CN201510671064A CN106589419A CN 106589419 A CN106589419 A CN 106589419A CN 201510671064 A CN201510671064 A CN 201510671064A CN 106589419 A CN106589419 A CN 106589419A
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Abstract
The invention provides a preparation method of a glass fiber reinforced polypropylene resin powder for selective laser sintering. The method includes the steps of: a) at a heating temperature, dissolving polypropylene resin in an alkane organic solvent to obtain a polypropylene resin solution; b) cooling the polypropylene resin solution obtained by step a) to make solid precipitate out; c) adding assistants into the solid-liquid mixture obtained by step b), mixing the substances evenly, and performing drying so as to obtain the powder, wherein the assistants include ultra-short glass fiber, an antioxidant and a powder separant. The method has the characteristics of simple operation and easy operation, not only provides the sintering raw material with excellent processing properties for selective laser sintering, but also provides a new direction for processing and application of functional polypropylene resin. The invention further provides the glass fiber reinforced polypropylene resin powder prepared according to the method and a selective laser sintering method adopting the glass fiber reinforced polypropylene resin powder as the sintering powder raw material.
Description
Technical field
The present invention relates to technical field of polymer processing, and in particular to a kind of glass for selective laser sintering
RPP toner and preparation method thereof and the application in terms of selective laser sintering.
Background technology
Selective laser sintering (Selective Laser Sintering, SLS) technology is a kind of rapid shaping technique, is
At present most widely used and most market prospect technology in increases material manufacturing technology, presents in recent years fast development
Trend.SLS technologies are by computer 3D solid to be scanned first, are then shone by high intensity laser beam
The material powder spread on workbench or parts in advance optionally molten sintering layer by layer is penetrated,
And then the technology of realization successively molding.SLS technologies have the design of height flexible, can produce accurate mould
Type and prototype, the parts that can directly use that can have reliable structure with molding, and it is with short production cycle,
Process is simple, is therefore particularly suited for the exploitation of new product.
The moulding material species that can be used in SLS technologies is relatively broad, including macromolecule, paraffin, metal, pottery
Porcelain and their composite.However, the performance of moulding material, character are again that SLS technologies sintering is successful
One key factor, it also directly affects the shaping speed of profiled member, precision, and physics, chemical property and
Its combination property.Although applicable moulding material species is various, SLS technologies can be directly applied at present
And successfully produce that scale error is little, surface is regular, the polymer powder powder stock of the moulded work that porosity is low is fresh
It is few.In prior art, the powder stock of SLS is generally prepared using comminuting method, such as deep cooling crush method, this
Particular device is not only needed, the particles of powdered ingredient surface for preparing is rougher, particle diameter not enough uniform, shape
Irregularly, it is unfavorable for the formation of sintered moulded body, and affects the performance of molded body.It is applied to SLS in the market
The polymer powder scarcity of raw material of technology, therefore the corresponding pressed powder raw material of various type of polymer urgently opens
Send out.
Polypropylene is a kind of use range very wide and very big commodity polymer material of consumption, with good synthesis
Performance.However, its physical and mechanical properties is poor, it is restricted in application process.
The content of the invention
For the defect and deficiency of prior art, the invention provides a kind of fiber glass reinforced polypropylene toner and
Its preparation method and application.According to the fiber glass reinforced polypropylene toner that the present invention is provided, with suitable chi
Very little size, suitable heap density, well-balanced granule profile and even particle size distribution, powder flowbility are good, fit
The various moulded works required to biodegradable are prepared for selective laser sintering, especially be with the addition of
After including the auxiliary agent including ultrashort glass fibre, antioxidant and separator powder, the machinery and power of product can be strengthened
Performance is learned, improves its dispersibility and stability.
According to the present invention, a kind of fiber glass reinforced polypropylene toner for selective laser sintering is provided first
Preparation method, the method comprising the steps of：A) at the heating temperature, acrylic resin is dissolved in into alkane
In hydrocarbon organic solvent, acrylic resin solution is obtained；B) the acrylic resin solution drop for obtaining step a)
Temperature, separates out solid precipitation；C) mix homogeneously after auxiliary agent is added in the solidliquid mixture that step b) is obtained,
Remove solvent and be drying to obtain the powder；Wherein, the auxiliary agent includes ultrashort glass fibre, antioxidant and powder
Last interleaving agent.
The present invention one preferred embodiment in, the alkanes organic solvent be pentane, isopentane,
Normal hexane, 2- methylpentanes, 3- methylpentanes, 2,2- dimethylbutanes, 2,3- dimethylbutanes, hexamethylene,
Normal heptane, 2- methyl hexanes, 3- methyl hexanes, 2,2- dimethyl pentanes, 2,3- dimethyl pentanes, 2,4- dimethyl
At least one in pentane, 3,3- dimethyl pentanes, 3- ethylpentanes and 2,2,3- triptanes.
In a preferred embodiment of the present invention, the alkanes organic solvent is for normal hexane and/or just
Heptane.
Although organic solvent deposit technology has been used for separating and purifying biochemical substances, especially protein, or
Person prepares crystal for precipitation.But, at present with regard to being prepared for selective laser using organic solvent precipitation method
The report of the resin material powder of sintering technology is also little.Especially not yet it is used to prepare to be applied to selective laser
The polypropylene powder resin of sintering.For organic solvent deposit technology, the selection of solvent species is most important.It is right
In specific macromolecular material acrylic resin, the present inventor passes through to be constantly trying to and exploratory development,
It was found that dissolving as organic solvent and dropping using organic solvent as above, especially normal hexane and/or normal heptane
During temperature precipitation acrylic resin, the laser sintered polypropylene powder powder stock of being suitably selected for property is obtained in that.
The present inventor is further had found by substantial amounts of experimental exploring, when using organic molten as mentioned above
Agent, such as normal hexane as acrylic resin solvent when, acrylic resin can be made with spherical and/or spherical
Character separate out, and with 30-150 μm of particle diameter, surface is round and smooth, and good dispersion, distribution of sizes is little,
It is particularly well-suited to Selective Laser Sintering.
, according to the invention it is preferred in step a), count by 100 parts by weight of acrylic resin, it is described to have
Machine solvent is 600-1200 parts by weight, preferably 800-1000 parts by weight.
When the consumption of organic solvent is in aforementioned range, the preferable acrylic resin of pattern, dispersibility is obtained in that
Powder.
, according to the invention it is preferred in step a), acrylic resin solution be kept into 30-90 in heating-up temperature
Minute, the heating-up temperature is 90-160 DEG C, preferably 100-140 DEG C, more preferably 110-120 DEG C.
Preferably, step a) is heated under noble gases, such as nitrogen atmosphere.
Preferably, step b) is carried out at autogenous pressures, preferably 0.1-0.3MPa.
, according to the invention it is preferred in step b), acrylic resin solution is cooled to into cooling target temperature,
And kept for 30-90 minutes in cooling target temperature；The cooling target temperature is 10-30 DEG C, average rate of temperature fall
For 0.1 DEG C/min-1 DEG C/min.
Preferably, in step b), acrylic resin solution is cooled to into one or more medium temperatures, and
Kept for 30-90 minutes in the medium temperature；Heating-up temperature and step b) of the medium temperature between step a)
Cooling target temperature between, preferably 60-90 DEG C, more preferably 70-80 DEG C.
In the method that the present invention is provided, the temperature-fall period of acrylic resin solution can at the uniform velocity lower the temperature, it is also possible to
Stage cooling.The present inventor has found preferred in some of the invention through substantial amounts of experimental exploring
In embodiment, in step b), acrylic resin solution is cooled to into one or more medium temperatures, and
Kept for 30-90 minutes in the medium temperature；The medium temperature is preferably 60-90 DEG C, more preferably 70-80
℃.Easy to understand, the medium temperature refers to the cooling target temperature of the heating-up temperature of step a) and step b)
Between temperature.For example, in a specific embodiment, by acrylic resin solution from heating-up temperature 120
When DEG C being down to 80 DEG C, in 80 DEG C of keeping temperatures 60 minutes；Or directly it is down to 10-30 DEG C.It is excellent at other
In selecting embodiment, when acrylic resin solution is down to 70-80 DEG C from heating-up temperature, 30-90 minutes are incubated,
It is obtained in that and preferably separate out effect.
By the heating cooling method of the present invention, the powder particle for obtaining even particle size distribution is ensure that, thus
It is particularly suitable for selective laser sintering application.
, according to the invention it is preferred to the melt index of the acrylic resin is determined under 210 DEG C, 2.16kg carrying capacity
For 20-100g/10min, more preferably 30-80g/10min.Select such acrylic resin, it is possible to obtain more preferably
Selective laser sintering effect and sintered products.
, according to the invention it is preferred in step c), count by 100 parts by weight of acrylic resin, it is described super
Short glass fiber is 5-60 parts by weight, preferably 10-50 weight portions.
Ultrashort glass fibre has good dispersion, the features such as mobility is excellent, is conducive to powder sintering process.
Ultrashort glass fibre is added in toner, product cost on the one hand can be reduced, on the other hand can strengthen poly-
The intensity and wearability of allyl resin powder, on the premise of product biodegradation is not affected, can obtain with one
Determine mechanical strength, good dispersion, fiber glass reinforced polypropylene toner stable in properties.
In a preferred embodiment, the ultrashort glass fibre be 5-20 μm of diameter, length
100-1000 μm of glass fibre, preferably 5-15 μm of diameter, the glass fibre of length 100-500 μm, more
Preferably 5-15 μm of diameter, the alkali-free glass fibre of length 100-500 μm.
According to the present invention, count by 100 parts by weight of acrylic resin, the antioxidant is 0.2-1.0 weight portions
Number, preferably 0.4-0.8 parts by weight.
Can prevent or delay acrylic resin that oxidative degradation occurs using antioxidant, so as to extend it the longevity is used
Life.Especially its consumption can obtain the longer acrylic resin powder of stable in properties, usage cycles in aforementioned range
End.
In a preferred embodiment, the antioxidant is antioxidant 1010 and irgasfos 168.With poly- third
Olefine resin is 100 parts by weight meters, and the antioxidant 1010 and irgasfos 168 are more preferably respectively 0.1-0.5
The weight of parts by weight, more preferably 0.2-0.4 parts by weight, the antioxidant 1010 and irgasfos 168
Amount ratio preferably 1:1.
According to the present invention, count by 100 parts by weight of acrylic resin, the separator powder is 0.01-10
Parts by weight, preferably 0.1-5 parts by weight, more preferably 0.5-1 parts by weight.
On the one hand can prevent from being bondd between polypropylene powder resin granule using separator powder, so that
Processing characteristics is affected, the bonding of fiberglass reinforced agent is on the other hand also possible to prevent so as to which being dispersed in evenly is poly-
Fiberglass reinforced performance is played in allyl resin, further, separator powder can also be cooperateed with fiberglass reinforced agent
Effect, especially its consumption is obtained in that dispersibility and good fluidity, is suitable for selectivity in aforementioned range
Laser sintered polypropylene powder resin.
In a preferred embodiment, the separator powder is based on alkane monocarboxylic acid or dimeric dibasic acid
Alkali metal or alkaline-earth metal, more preferably from sodium stearate, potassium stearate, zinc stearate, calcium stearate and Hard Fat
At least one in lead plumbate.
In another preferred embodiment, the separator powder is nano-oxide or nano metal salt,
More preferably from nano silicon, nano titanium oxide, nano aluminium oxide, nano zine oxide, nano zircite,
At least one in nano-calcium carbonate and nano barium sulfate.
Present invention also offers the fiberglass reinforced for selective laser sintering prepared according to said method
Polypropylene powder resin, the granule of the powder is spherical and/or spherical, and the particle diameter of granule is 30-150 μm,
Particle diameter distribution D10=30-56 μm, D50=61-103 μm, D90=106-138 μm.There is provided according to the present invention
The polypropylene powder resin is particularly suited for Selective Laser Sintering, and sintering success rate is high, the sintering for obtaining
Product is little with predetermined prod scale error, and section cavity is few, fiberglass reinforced excellent performance.
The present invention still further provides a kind of selective laser sintering method, and methods described is included by above-mentioned side
Method prepares fiber glass reinforced polypropylene toner, using as sintered powder raw material.The choosing provided by the present invention
Selecting property laser sintering processes, can prepare with irregular figure, the well-balanced smooth, satisfactory mechanical property in surface,
The polypropylene moulded work of fiberglass reinforced excellent performance.
Provided by the present invention for the preparation method of the fiber glass reinforced polypropylene toner of selective laser sintering,
Operating procedure is simple, easily operated, by selecting suitable solvent, selects under specific temperature and pressure,
Design suitably rises gentle cooling method, and so as to obtain form, character etc. selective laser sintering is particularly suitable for
Fiber glass reinforced polypropylene toner raw material, be of moderate size with powder size, surface is round and smooth, dispersibility and
The features such as good fluidity, even particle size distribution, heap appropriate density, especially with the addition of including ultrashort glass fibre,
Antioxidant and separator powder when for Selective Laser Sintering, can easily be made after interior auxiliary agent
It is standby that scale error is little, hole is few, profile is well-balanced, volume resistance is significantly reduced, the mould of fiberglass reinforced excellent performance
Modeling product.Thus, the invention provides a kind of fiberglass reinforced suitable for selective laser sintering of good performance is poly-
Allyl resin powder stock and preparation method thereof, only selective laser sintering does not provide new qualified sintering
Raw material, the also processing for functionalized polypropylene resin and application provides new direction.
Specific embodiment
The present invention will be described further by specific embodiment below, it should be appreciated that the scope of the present invention
It is not limited to this.
Scheme according to embodiment 1-6 prepares polypropylene powder resin, but without ultrashort glass fibre, adopts
Laser particle analyzer (Mastersizer 2000, Malvern companies of Britain) characterizes its particle diameter and particle diameter distribution, i.e.,
Obtain the particle diameter and particle diameter distribution of the granule of the fiber glass reinforced polypropylene toner that embodiment 1-6 is obtained.
Embodiment 1
By the acrylic resin of 100 weight portions (melt index (210 DEG C, 2.16kg) is 35g/10min) and
The normal hexane of 1000 weight portions is placed in autoclave.High pure nitrogen is passed through to 0.2MPa；Then raise temperature to
120 DEG C, constant temperature 60 minutes at this temperature；Jing cooling waters are down to the speed of 1.0 DEG C/min after constant temperature terminates
80 DEG C, constant temperature 60 minutes at this temperature；Continuation is down to 25 DEG C with the speed of 1.0 DEG C/min, at this temperature
Constant temperature 60 minutes.5 μm of the diameter of 10 weight fractions, 150 μm of length are added in the solidliquid mixture for obtaining
The irgasfos 168 of ultrashort glass fibre, the antioxidant 1010 of 0.25 weight fraction and 0.25 weight fraction, with
And 0.5 weight fraction calcium stearate after, be centrifuged and obtain after being vacuum dried be applied to selective laser
The fiber glass reinforced polypropylene toner of sintering.The particle diameter of the granule of the fiber glass reinforced polypropylene toner is
45-135 μm, particle diameter distribution is D10=49 μm, D50=84 μm, D90=122 μm.
Embodiment 2
By the acrylic resin of 100 weight portions (melt index (210 DEG C, 2.16kg) is 55g/10min) and
The normal hexane of 800 weight portions is placed in autoclave.High pure nitrogen is passed through to 0.3MPa；Then raise temperature to 130
DEG C, constant temperature 60 minutes at this temperature；Jing cooling waters are down to 20 with the speed of 1.0 DEG C/min after constant temperature terminates
DEG C, and kept for 60 minutes at 20 DEG C.Add in the solidliquid mixture for obtaining 25 weight fractions 10 μm of diameter,
The ultrashort glass fibre of 250 μm of length, the antioxidant 1010 of 0.25 weight fraction and 0.25 weight fraction it is anti-
After oxygen agent 168, and the zinc stearate of 1 weight fraction, it is centrifuged and is applied to after being vacuum dried
The fiber glass reinforced polypropylene toner of selective laser sintering.The granule of the fiber glass reinforced polypropylene toner
Particle diameter be 40-130 μm, particle diameter distribution be D10=50 μm, D50=84 μm, D90=108 μm.
Embodiment 3
By the acrylic resin of 100 weight portions (melt index (210 DEG C, 2.16kg) is 70g/10min) and
The normal hexane of 1200 weight portions is placed in autoclave.High pure nitrogen is passed through to 0.1MPa；Then raise temperature to
110 DEG C, constant temperature 90 minutes at this temperature；Jing cooling waters are down to the speed of 0.1 DEG C/min after constant temperature terminates
25 DEG C, constant temperature 90 minutes at this temperature.The diameter of 10 weight fractions is added in the solidliquid mixture for obtaining
15 μm, the ultrashort glass fibre of 200 μm of length, the antioxidant 1010 of 0.1 weight fraction and 0.1 weight fraction
Irgasfos 168, and after the nano silicon of 0.75 weight fraction, after being centrifuged and being vacuum dried
Obtain being applied to the fiber glass reinforced polypropylene toner of selective laser sintering.The fiber glass reinforced polypropylene resin
The particle diameter of the granule of powder is 30-147 μm, and particle diameter distribution is D10=38 μm, D50=95 μm, D90=129 μm.
Embodiment 4
By the acrylic resin of 100 weight portions (melt index (210 DEG C, 2.16kg) is 60g/10min) and
The normal hexane of 1200 weight portions is placed in autoclave.High pure nitrogen is passed through to 0.1MPa；Then raise temperature to
110 DEG C, constant temperature 90 minutes at this temperature；Jing cooling waters are down to the speed of 0.5 DEG C/min after constant temperature terminates
75 DEG C, constant temperature 60 minutes at this temperature；Continuation is down to 25 DEG C with the speed of 0.1 DEG C/min, at this temperature
Kept for 30 minutes.5 μm of the diameter of 50 weight fractions, 150 μm of length are added in the solidliquid mixture for obtaining
The irgasfos 168 of ultrashort glass fibre, the antioxidant 1010 of 0.3 weight fraction and 0.3 weight fraction, and
After the nano zine oxide of 0.9 weight fraction, it is centrifuged and obtains after being vacuum dried to be applied to selective laser
The fiber glass reinforced polypropylene toner of sintering.The particle diameter of the granule of the fiber glass reinforced polypropylene toner is
35-130 μm, particle diameter distribution is D10=50 μm, D50=89 μm, D90=110 μm.
Embodiment 5
By the acrylic resin of 100 weight portions ((210 DEG C, 2.16kg) of melt index is 65g/10min) and
The normal hexane of 1000 weight portions is placed in autoclave.High pure nitrogen is passed through to 0.3MPa；Then raise temperature to
110 DEG C, constant temperature 30 minutes at this temperature；Jing cooling waters are down to the speed of 0.5 DEG C/min after constant temperature terminates
30 DEG C, constant temperature 30 minutes at this temperature.The diameter of 35 weight fractions is added in the solidliquid mixture for obtaining
15 μm, the ultrashort glass fibre of 500 μm of length, the antioxidant 1010 of 0.2 weight fraction and 0.2 weight fraction
Irgasfos 168, and after the nano-calcium carbonate of 0.6 weight fraction, after being centrifuged and being vacuum dried
To the fiber glass reinforced polypropylene toner suitable for selective laser sintering.The fiber glass reinforced polypropylene resin-oatmeal
The particle diameter of the granule at end is 30-150 μm, and particle diameter distribution is D10=39 μm, D50=91 μm, D90=133 μm.
Embodiment 6
By the acrylic resin of 100 weight portions ((210 DEG C, 2.16kg) of melt index is 40g/10min) and
The normal heptane of 1200 weight portions is placed in autoclave.High pure nitrogen is passed through to 0.2MPa；Then raise temperature to
110 DEG C, constant temperature 90 minutes at this temperature；Jing cooling waters are down to the speed of 0.5 DEG C/min after constant temperature terminates
70 DEG C, constant temperature 90 minutes at this temperature；Continuation is down to 25 DEG C with the speed of 0.2 DEG C/min, at this temperature
Constant temperature 30 minutes.5 μm of the diameter of 25 weight fractions, 150 μm of length are added in the solidliquid mixture for obtaining
The irgasfos 168 of ultrashort glass fibre, the antioxidant 1010 of 0.15 weight fraction and 0.15 weight fraction, with
And 0.8 weight fraction sodium stearate after, be centrifuged and obtain after being vacuum dried be applied to selective laser
The fiber glass reinforced polypropylene toner of sintering.The particle diameter of the granule of the fiber glass reinforced polypropylene toner is
40-130 μm, particle diameter distribution is D10=56 μm, D50=85 μm, D90=106 μm.
The granule of the polypropylene powder resin that the method for the present invention is prepared is spherical and/or spherical, such as horse
Bell potato character, the surface of granule is more smooth, and preferably, the aggregation caking of granule is few therefore particularly suitable for dispersibility
In selective laser sintering.From the point of view of granulometry result, the acrylic resin that the method according to the invention is obtained
Powder diameter is distributed than more uniform.
Comparative example 1
By the acrylic resin of 100 weight portions (melt index (210 DEG C, 2.16kg) is 35g/10min) and
The normal hexane of 1000 weight portions is placed in autoclave.High pure nitrogen is passed through to 0.2MPa；Then raise temperature to
120 DEG C, constant temperature 60 minutes at this temperature；Jing cooling waters are down to the speed of 1.0 DEG C/min after constant temperature terminates
80 DEG C, constant temperature 60 minutes at this temperature；Continuation is down to 25 DEG C with the speed of 1.0 DEG C/min, at this temperature
Constant temperature 60 minutes.The antioxidant 1010 and 0.25 weight of 0.25 weight fraction are added in the solidliquid mixture for obtaining
The irgasfos 168 of amount fraction, and after the calcium stearate of 0.5 weight fraction, be centrifuged and be vacuum dried
Obtain afterwards being applied to the polypropylene powder resin of selective laser sintering.Characterize what is obtained using laser particle analyzer
The particle diameter of polypropylene powder resin be 50-130 μm, particle diameter distribution be D10=52 μm, D50=87 μm,
D90=124 μm.
The polypropylene powder resin of the fiber glass reinforced polypropylene toner of embodiment 1-6 and comparative example 1 is existed
On the powder sintered formers of SLS, require to make dumbbell shape test sample according to the test bars of GB ISO 527.
The mechanical property of said products, the measurement result such as institute of table 1 are tested according to GB ISO 527 using universal testing machine
Show.
The tensile strength of the polypropylene powder resin sintered article of embodiment 1-6 of table 1 and comparative example 1
Found out by table 1, the tensile strength of polypropylene powder resin itself is 32MPa, and embodiment of the present invention 1-6
Fiber glass reinforced polypropylene toner sintered article compared with comparative example 1, its tensile strength is increased substantially,
The mechanical property for making the polypropylene powder resin of present invention preparation significantly improves.
Although the present invention is described in detail, it will be understood by those skilled in the art that in spirit of the invention and model
Modification in enclosing will be apparent.However, it should be understood that each side, difference that the present invention is recorded
The each several part of specific embodiment and the various features enumerated can be combined or all or part of exchange.Above-mentioned
Each specific embodiment in, those with reference to another embodiment embodiment can suitably with its
Its embodiment combination, this is will be to understand by those skilled in the art.Additionally, those skilled in the art
It will be understood that, description above is only the mode of example, it is no intended to limit the present invention.
Claims (13)
1. a kind of preparation method of the fiber glass reinforced polypropylene toner for selective laser sintering, the side
Method is comprised the following steps：
A) at the heating temperature, acrylic resin is dissolved in alkanes organic solvent, obtains acrylic resin
Solution；
B) the acrylic resin solution cooling for obtaining step a), separates out solid precipitation；
C) mix homogeneously after auxiliary agent is added in the solidliquid mixture that step b) is obtained, solvent is removed and drying is
Obtain the powder；
Wherein, the auxiliary agent includes ultrashort glass fibre, antioxidant and separator powder.
2. method according to claim 1, it is characterised in that the alkanes organic solvent be pentane,
Isopentane, normal hexane, 2- methylpentanes, 3- methylpentanes, 2,2- dimethylbutanes, 2,3- dimethylbutanes,
Hexamethylene, normal heptane, 2- methyl hexanes, 3- methyl hexanes, 2,2- dimethyl pentanes, 2,3- dimethyl pentanes,
At least one in 2,4- dimethyl pentanes, 3,3- dimethyl pentanes, 3- ethylpentanes and 2,2,3- triptanes；
The acrylic resin is at least in HOPP, atactic copolymerized polypropene and impact copolymer polypropylene
Kind.
3. method according to claim 1 and 2, it is characterised in that in step a), with polypropylene
Resin be 100 parts by weight meters, the organic solvent be 600-1200 parts by weight, preferably 800-1000
Parts by weight.
4. the method according to any one of claim 1-3, it is characterised in that in step a), will
Acrylic resin solution is kept for 30-90 minutes in heating-up temperature, and the heating-up temperature is 90-160 DEG C, preferably
100-140 DEG C, more preferably 110-120 DEG C.
5. the method according to any one of claim 1-4, it is characterised in that in step b), will
Acrylic resin solution is cooled to cooling target temperature, and is kept for 30-90 minutes in cooling target temperature；It is described
Cooling target temperature is 10-30 DEG C, and average rate of temperature fall is 0.1 DEG C/min-1 DEG C/min.
6. the method according to any one of claim 1-5, it is characterised in that in step b), will
Acrylic resin solution is cooled to one or more medium temperatures, and is kept for 30-90 minutes in the medium temperature；
The medium temperature between the heating-up temperature of step a) and the cooling target temperature of step b), preferably
60-90 DEG C, more preferably 70-80 DEG C.
7. the method according to any one of claim 1-6, it is characterised in that the acrylic resin
Melt index be determined as 20～100g/10min, preferably 30～80g/10min under 210 DEG C, 2.16kg carrying capacity.
8. the method according to any one of claim 1-7, it is characterised in that with acrylic resin as 100
Parts by weight meter, the ultrashort glass fibre is 5-60 parts by weight, preferably 10-50 weight portions；It is described anti-
Oxygen agent is 0.1-1.0 parts by weight, preferably 0.2-0.6 parts by weight；The separator powder is 0.01-10 weights
Amount number, preferably 0.1-5 parts by weight, more preferably 0.5-1 parts by weight.
9. the method according to any one of claim 1-8, it is characterised in that the ultrashort glass fibre
For 5-20 μm of diameter, the preferably glass fibre of length 100-500 μm, 5-15 μm of diameter, length 100-250 μm
Alkali-free glass fibre.
10. the method according to any one of claim 1-9, it is characterised in that the separator powder
It is based in the alkali metal or alkaline-earth metal of alkane monocarboxylic acid or dimeric dibasic acid, nano-oxide and nano metal salt
At least one, preferably be selected from sodium stearate, potassium stearate, zinc stearate, calcium stearate, lead stearate, receive
Rice silicon dioxide, nano titanium oxide, nano aluminium oxide, nano zine oxide, nano zircite, nano-calcium carbonate
At least one in calcium and nano barium sulfate.
11. methods according to any one of claim 1-10, it is characterised in that the antioxidant includes
Antioxidant 1010 and irgasfos 168.
What a kind of 12. methods according to any one of claim 1-11 were prepared burns for selective laser
The fiber glass reinforced polypropylene toner of knot, the granule of the powder is spherical and/or spherical, the particle diameter of granule
For 30-150 μm, particle diameter distribution D10=30-56 μm, D50=61-103 μm, D90=106-138 μm.
A kind of 13. selective laser sintering methods, methods described is included by such as any one of claim 1-11
Described method prepares fiber glass reinforced polypropylene toner, using as sintered powder raw material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107722564A (en) * | 2017-10-27 | 2018-02-23 | 华中科技大学 | The preparation method and product of a kind of glass fiber resin compound material |
| CN110229422A (en) * | 2019-07-01 | 2019-09-13 | 四川大学 | Low-warpage PP R base composite wire material and preparation method thereof for 3D printing |
| CN111849064A (en) * | 2019-04-25 | 2020-10-30 | 振石集团华美新材料有限公司 | Continuous glass fiber reinforced polypropylene prepreg tape and preparation method thereof |
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| CN102399371A (en) * | 2011-10-17 | 2012-04-04 | 湖南华曙高科技有限责任公司 | Preparation method of polyamide powder used for selective laser sintering |
| CN103951971A (en) * | 2014-05-12 | 2014-07-30 | 湖南华曙高科技有限责任公司 | Carbon fiber reinforced resin powder material for selective laser sintering |
| CN104497323A (en) * | 2014-12-17 | 2015-04-08 | 湖南华曙高科技有限责任公司 | Preparation method of nylon powder for selective laser sintering |
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| CN102399371A (en) * | 2011-10-17 | 2012-04-04 | 湖南华曙高科技有限责任公司 | Preparation method of polyamide powder used for selective laser sintering |
| CN103951971A (en) * | 2014-05-12 | 2014-07-30 | 湖南华曙高科技有限责任公司 | Carbon fiber reinforced resin powder material for selective laser sintering |
| CN104497323A (en) * | 2014-12-17 | 2015-04-08 | 湖南华曙高科技有限责任公司 | Preparation method of nylon powder for selective laser sintering |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107722564A (en) * | 2017-10-27 | 2018-02-23 | 华中科技大学 | The preparation method and product of a kind of glass fiber resin compound material |
| CN111849064A (en) * | 2019-04-25 | 2020-10-30 | 振石集团华美新材料有限公司 | Continuous glass fiber reinforced polypropylene prepreg tape and preparation method thereof |
| CN110229422A (en) * | 2019-07-01 | 2019-09-13 | 四川大学 | Low-warpage PP R base composite wire material and preparation method thereof for 3D printing |
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Application publication date: 20170426 |