CN104804380A - High-strength PET copolyester material for 3D printing and preparation method thereof - Google Patents
High-strength PET copolyester material for 3D printing and preparation method thereof Download PDFInfo
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- CN104804380A CN104804380A CN201410821411.7A CN201410821411A CN104804380A CN 104804380 A CN104804380 A CN 104804380A CN 201410821411 A CN201410821411 A CN 201410821411A CN 104804380 A CN104804380 A CN 104804380A
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Abstract
The invention discloses a high-strength PET copolyester material for 3D printing and a preparation method thereof. Raw materials comprise, by weight, 70-85% of PET, 15-30% of reinforced fiber, 0.5-2.0% of a coupling agent, 0.1-2.0% of a stabilizing agent, 0.1-1.0% of an antioxidant and 0.1-1.0% of a lubricant. The preparation method comprises the following steps: weighing the materials in the raw material formula according to the weight ratio, drying the materials, uniformly mixing, sending the mixed materials into a loading hopper of a twin-screw extruder, carrying out high-speed shearing through a twin-screw, extruding, bracing, cooling and granulating. The prepared 3D printing PET copolyester material has advantages of low cost, high mechanical strength, low melting temperature, low shrinkage and good dimensional stability, and can replace expensive 3D printing ABS materials and polylactic acid materials.
Description
Technical field
The present invention relates to PET copolyester material field, particularly relate to a kind of 3D printing high-strength PET copolyester material and preparation method thereof.
Background technology
3D printing technique is also known as increasing material manufacturing technology, a kind of based on digital model file, use powdery metal or plastics etc. can jointing material, carried out the technology of constructed object by the mode successively printed, be widely used in the fields such as medical science, biotechnology, building, clothes, aviation.
At present, it is ABS material and poly-lactic acid material that 3D prints conventional plastics, adopt the method manufacture of " being layering; layers cementing ", but general 3D prints ABS material price higher than 400,000 yuan/ton, poly-lactic acid material price, higher than 200,000 yuan/ton, so just hinders the development of 3D printing technique greatly.
PET copolyesters be a kind of adopt terephthalic acid, m-phthalic acid, propylene glycol and polyfunctional monomer to carry out esterification under the effect of catalyzer after carry out the copolyesters that polycondensation obtains further.PET copolyesters price is low, the transparency is high, easily dye.Its second-order transition temperature is at 45-58 DEG C, and material gets final product complete melting more than 180 DEG C, therefore can carry out 3D printing at 180-200 DEG C, not have obvious degradation.Packing of molecules structure is armorphous, and therefore 3D prints and obtains that the shrinking percentage of goods is little, good stability of the dimension.These features all meet the requirement of 3D printing technique to polymer materials performance.
But because PET copolyesters is non-crystal structure, in molecular chain, ester bond bond energy is little, easily ruptures.Unmodified PET copolyesters is directly used in 3D and prints, and the goods obtained exist the bad defect of mechanical property.
Summary of the invention
The object of the invention is to the deficiency overcoming the existence of above-mentioned prior art, provide a kind of 3D printing PET copolyester material, its price is low, mechanical strength is high, melt temperature is low, shrinking percentage is little and good stability of the dimension.
Meanwhile, present invention also offers a kind of preparation method of 3D printing high-strength PET copolyester material.
For achieving the above object, the present invention is achieved by the following technical solutions:
A kind of 3D prints and uses high-strength PET copolyester material, it is characterized in that basic recipe and weight percent consist of:
Preferably, described PET is copolymerization ester type PET.
Preferably, described PET co-polyester melt temperature is 180 DEG C, and limiting viscosity is 0.55-0.7dl/g.
Preferably, described fortifying fibre is one or several mixtures in short fiber glass fibre, carbon fiber and boron fibre.
Preferably, described coupling agent is one or several the mixture in titanate coupling agent, aluminate coupling agent and silane coupling agent.
Preferably, described stablizer is one or several the mixture in trimethyl phosphite 99, phosphoric acid, triethyl phosphate and triphenyl phosphite.
Preferably, described oxidation inhibitor be any one and auxiliary antioxidant 168 in primary antioxidant 1010, primary antioxidant 1076, primary antioxidant 1098 in 1: 1-1: 4 ratio mixing.
Preferably, described lubricant is one or several the mixture in polyvalent alcohol stearate, Zinic stearas and erucicamide.
Above-mentioned 3D printing high-strength PET copolyester material, its processing step prepared is as follows:
(1) material in composition of raw materials is taken by weight ratio.
(2) dry material, PET copolyesters is at 80 DEG C of drying 3 ~ 5h.
(3) PET copolyesters, fortifying fibre and coupling agent are added in mixer be mixed together 5 ~ 10 minutes, then the material of remainder is added in mixer and be mixed together 30 ~ 60 minutes, discharging.
(4) mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, cooling, granulation.One district's temperature of setting twin screw extruder is 170 ~ 200 DEG C, two district's temperature are 180 ~ 210 DEG C, three district's temperature are 190 ~ 220 DEG C, four district's temperature are 200 ~ 230 DEG C, five district's temperature are 200 ~ 220 DEG C, head temperature is 200 ~ 210 DEG C, and rate of feeding is 20 ~ 200 revs/min, and screw speed is 50 ~ 500 revs/min.
Starting components of the present invention is for base material coordinates fortifying fibre, stablizer, oxidation inhibitor and lubricant with PET copolyesters.Compared with prior art, the present invention adopts PET copolyesters to be that matrix resin prepares 3D printed material, and its price is low, and melt temperature is low, and 3D prints and obtains that the shrinking percentage of goods is little, good stability of the dimension.Meanwhile, add fortifying fibre, improve the mechanical strength of PET copolyesters, meet the requirement of 3D printing technique to polymer materials performance, expensive 3D can be replaced completely to print ABS material and poly-lactic acid material.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
A kind of 3D prints with high-strength PET copolyester material and preparation method thereof.The weight percent composition of raw material:
The processing step of preparation is as follows:
(1) material in composition of raw materials is taken by weight ratio.
(2) dry material, PET copolyesters is at 80 DEG C of drying 3 ~ 5h.
(3) PET copolyesters, fortifying fibre and coupling agent are added in mixer be mixed together 5 ~ 10 minutes, then the material of remainder is added in mixer and be mixed together 30 ~ 60 minutes, discharging.
(4) mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, cooling, granulation.One district's temperature of setting twin screw extruder is 170 ~ 200 DEG C, two district's temperature are 180 ~ 210 DEG C, three district's temperature are 190 ~ 220 DEG C, four district's temperature are 200 ~ 230 DEG C, five district's temperature are 200 ~ 220 DEG C, head temperature is 200 ~ 210 DEG C, and rate of feeding is 20 ~ 200 revs/min, and screw speed is 50 ~ 500 revs/min.
PET copolyester material prepared by the present invention, its price is low, mechanical strength is high, melt temperature is low, shrinking percentage is little and good stability of the dimension.
Embodiment 1
Raw material is taken by following weight percent content:
The preparation technology of embodiment 1: get feed composition by above-mentioned each proportioning respectively.PET copolyesters is added in materal drier, 80 DEG C of dry 3h.PET copolyesters, short fiber glass fibre and titanate coupling agent after drying are added in mixer and is mixed together 5 minutes, then the material of remainder is added in mixer and be mixed together 30 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 170 ~ 180 DEG C, two district's temperature are 180 ~ 190 DEG C, three district's temperature are 190 ~ 200 DEG C, four district's temperature are 210 ~ 220 DEG C, five district's temperature are 200 ~ 210 DEG C, head temperature is 200 ~ 205 DEG C, and rate of feeding is 500 revs/min, and screw speed is 200 revs/min.
Embodiment 2
Raw material is taken by following weight percent content:
The preparation technology of embodiment 2: get feed composition by above-mentioned each proportioning respectively.PET copolyesters is added in materal drier, 80 DEG C of dry 5h.PET copolyesters, carbon fiber and aluminate coupling agent after drying are added in mixer and is mixed together 10 minutes, then the material of remainder is added in mixer and be mixed together 60 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 180 ~ 190 DEG C, two district's temperature are 185 ~ 200 DEG C, three district's temperature are 190 ~ 210 DEG C, four district's temperature are 210 ~ 230 DEG C, five district's temperature are 200 ~ 220 DEG C, head temperature is 200 ~ 210 DEG C, and rate of feeding is 20 revs/min, and screw speed is 50 revs/min.
Embodiment 3
Raw material is taken by following weight percent content:
The preparation technology of embodiment 3: get feed composition by above-mentioned each proportioning respectively.PET copolyesters is added in materal drier, 80 DEG C of dry 4h.PET copolyesters, boron fibre and silane coupling agent after drying are added in mixer and is mixed together 7 minutes, then the material of remainder is added in mixer and be mixed together 40 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 190 ~ 200 DEG C, two district's temperature are 200 ~ 210 DEG C, three district's temperature are 210 ~ 220 DEG C, four district's temperature are 220 ~ 230 DEG C, five district's temperature are 210 ~ 220 DEG C, head temperature is 200 ~ 210 DEG C, and rate of feeding is 200 revs/min, and screw speed is 500 revs/min.
Embodiment 4
Raw material is taken by following weight percent content:
The preparation technology of embodiment 4: get feed composition by above-mentioned each proportioning respectively.PET copolyesters is added in materal drier, 80 DEG C of dry 5h.PET copolyesters, short fiber glass fibre and aluminate coupling agent after drying are added in mixer and is mixed together 10 minutes, then the material of remainder is added in mixer and be mixed together 30 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 170 ~ 180 DEG C, two district's temperature are 180 ~ 190 DEG C, three district's temperature are 190 ~ 200 DEG C, four district's temperature are 200 ~ 210 DEG C, five district's temperature are 200 ~ 205 DEG C, head temperature is 200 ~ 205 DEG C, and rate of feeding is 50 revs/min, and screw speed is 100 revs/min.
Embodiment 5
Raw material is taken by following weight percent content:
The preparation technology of embodiment 5: get feed composition by above-mentioned each proportioning respectively.PET copolyesters is added in materal drier, 80 DEG C of dry 5h.PET copolyesters, carbon fiber and silane coupling agent after drying are added in mixer and is mixed together 5 minutes, then the material of remainder is added in mixer and be mixed together 60 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 190 ~ 200 DEG C, two district's temperature are 200 ~ 210 DEG C, three district's temperature are 210 ~ 220 DEG C, four district's temperature are 220 ~ 230 DEG C, five district's temperature are 210 ~ 220 DEG C, head temperature is 200 ~ 210 DEG C, and rate of feeding is 200 revs/min, and screw speed is 500 revs/min.
Embodiment 6
Raw material is taken by following weight percent content:
The preparation technology of embodiment 6: get feed composition by above-mentioned each proportioning respectively.(1) material in composition of raw materials is taken by weight ratio.PET copolyesters is added in materal drier, 80 DEG C of dry 3h.PET copolyesters, boron fibre and titanate coupling agent after drying are added in mixer and is mixed together 10 minutes, then the material of remainder is added in mixer and be mixed together 60 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 170 ~ 190 DEG C, two district's temperature are 180 ~ 200 DEG C, three district's temperature are 190 ~ 210 DEG C, four district's temperature are 210 ~ 230 DEG C, five district's temperature are 200 ~ 220 DEG C, head temperature is 200 ~ 210 DEG C, and rate of feeding is 20 revs/min, and screw speed is 50 revs/min.
Comparative example 1
As different from Example 1, in comparative example 1, modifying process does not add short fiber glass fibre, and other condition is constant.
Performance test
Size deviation: get PET copolyesters wire fabrication 2 meters, random choose selects 30 points, measures its diameter, be designated as d1-d30 with vernier callipers, tries to achieve mean value D, then the standard deviation of diameter is
tensile strength and notched Izod impact strength: according to standards of American society of test materials ASTM D638 and ASTMD256, PET copolyester material obtained in embodiment 1-6, comparative example 1 is detected respectively.Shown in test result sees the following form:
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (9)
1. 3D prints and uses a high-strength PET copolyester material, it is characterized in that basic recipe and weight percent consist of:
2. 3D printing high-strength PET copolyester material according to claim 1, is characterized in that: described PET is copolymerization ester type PET.
3. 3D printing high-strength PET copolyester material according to claim 1 and 2, is characterized in that: described PET co-polyester melt temperature is 180 DEG C, and limiting viscosity is 0.55-0.7dl/g.
4. 3D printing high-strength PET copolyester material according to claim 1, is characterized in that: described fortifying fibre is one or several the mixture in short fiber glass fibre, carbon fiber and boron fibre.
5. 3D printing high-strength PET copolyester material according to claim 1, is characterized in that: described coupling agent is one or several the mixture in titanate coupling agent, aluminate coupling agent and silane coupling agent.
6. 3D printing high-strength PET copolyester material according to claim 1, is characterized in that: described stablizer is one or several the mixture in trimethyl phosphite 99, phosphoric acid, triethyl phosphate and triphenyl phosphite.
7. 3D printing high-strength PET copolyester material according to claim 1, is characterized in that: described oxidation inhibitor be any one and auxiliary antioxidant 168 in primary antioxidant 1010, primary antioxidant 1076, primary antioxidant 1098 in 1: 1-1: 4 ratio mixing.
8. 3D printing high-strength PET copolyester material according to claim 1, is characterized in that: described lubricant is one or several the mixture in polyvalent alcohol stearate, Zinic stearas and erucicamide.
9. the preparation method of high-strength PET copolyester material of the 3D printing according to any one of claim 1 ~ 8, is characterized in that the processing step prepared is as follows:
(1) material in composition of raw materials is taken by weight ratio.
(2) dry material, PET copolyesters is at 80 DEG C of drying 3 ~ 5h.
(3) PET copolyesters, fortifying fibre and coupling agent are added in mixer be mixed together 5 ~ 10 minutes, then the material of remainder is added in mixer and be mixed together 30 ~ 60 minutes, discharging.
(4) mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, cooling, granulation.One district's temperature of setting twin screw extruder is 170 ~ 200 DEG C, two district's temperature are 180 ~ 210 DEG C, three district's temperature are 190 ~ 220 DEG C, four district's temperature are 200 ~ 230 DEG C, five district's temperature are 200 ~ 220 DEG C, head temperature is 200 ~ 210 DEG C, and rate of feeding is 20 ~ 200 revs/min, and screw speed is 50 ~ 500 revs/min.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105440560A (en) * | 2015-12-18 | 2016-03-30 | 青岛尤尼科技有限公司 | Carbon fiber composite material for fused deposition 3D printing and preparation method thereof |
| CN106317767A (en) * | 2016-08-22 | 2017-01-11 | 苏州聚冠复合材料有限公司 | Preparation method of ultrahigh-conductivity 3D printing carbon fiber composite wire |
| CN106566270A (en) * | 2016-10-20 | 2017-04-19 | 蒙宇 | Novel glass fiber composite material used for 3D printing |
| CN106633713A (en) * | 2016-10-18 | 2017-05-10 | 贵州当科技有限公司 | In-situ micro-glass-fiber reinforced polymer based 3D printing consumables as well as preparation method and equipment thereof |
| CN107266872A (en) * | 2017-06-01 | 2017-10-20 | 北京聚丽威科技有限公司 | A kind of 3D printing high-strength PET copolyester material and preparation method thereof |
| PL421950A1 (en) * | 2017-06-20 | 2019-01-02 | Zachodniopomorski Uniwersytet Technologiczny W Szczecinie | Method for producing a structural element and method for producing a container with the bottom |
| CN111110911A (en) * | 2020-01-16 | 2020-05-08 | 福州大学 | High-strength biodegradable 3D printing molded prosthesis prosthetic limb device and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102295826A (en) * | 2010-06-23 | 2011-12-28 | 苏州市苏晨化工塑料有限公司 | Reinforced flame-retarding polyethylene glycol terephthalate blended material |
| CN103709659A (en) * | 2012-09-30 | 2014-04-09 | 青岛欣展塑胶有限公司 | Glass fiber reinforced PBT/PET alloy material |
| CN103980467A (en) * | 2014-04-30 | 2014-08-13 | 中国科学院化学研究所 | High-viscosity polyester powder for 3D printing and preparation method thereof |
| CN103980675A (en) * | 2014-04-30 | 2014-08-13 | 中国科学院化学研究所 | 3D printing aromatic polyester material and preparation method |
| CN103980449A (en) * | 2014-04-30 | 2014-08-13 | 中国科学院化学研究所 | Composite material for 3D printing and preparation method thereof |
-
2014
- 2014-12-26 CN CN201410821411.7A patent/CN104804380A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102295826A (en) * | 2010-06-23 | 2011-12-28 | 苏州市苏晨化工塑料有限公司 | Reinforced flame-retarding polyethylene glycol terephthalate blended material |
| CN103709659A (en) * | 2012-09-30 | 2014-04-09 | 青岛欣展塑胶有限公司 | Glass fiber reinforced PBT/PET alloy material |
| CN103980467A (en) * | 2014-04-30 | 2014-08-13 | 中国科学院化学研究所 | High-viscosity polyester powder for 3D printing and preparation method thereof |
| CN103980675A (en) * | 2014-04-30 | 2014-08-13 | 中国科学院化学研究所 | 3D printing aromatic polyester material and preparation method |
| CN103980449A (en) * | 2014-04-30 | 2014-08-13 | 中国科学院化学研究所 | Composite material for 3D printing and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105440560A (en) * | 2015-12-18 | 2016-03-30 | 青岛尤尼科技有限公司 | Carbon fiber composite material for fused deposition 3D printing and preparation method thereof |
| CN106317767A (en) * | 2016-08-22 | 2017-01-11 | 苏州聚冠复合材料有限公司 | Preparation method of ultrahigh-conductivity 3D printing carbon fiber composite wire |
| CN106633713A (en) * | 2016-10-18 | 2017-05-10 | 贵州当科技有限公司 | In-situ micro-glass-fiber reinforced polymer based 3D printing consumables as well as preparation method and equipment thereof |
| CN106566270A (en) * | 2016-10-20 | 2017-04-19 | 蒙宇 | Novel glass fiber composite material used for 3D printing |
| CN107266872A (en) * | 2017-06-01 | 2017-10-20 | 北京聚丽威科技有限公司 | A kind of 3D printing high-strength PET copolyester material and preparation method thereof |
| PL421950A1 (en) * | 2017-06-20 | 2019-01-02 | Zachodniopomorski Uniwersytet Technologiczny W Szczecinie | Method for producing a structural element and method for producing a container with the bottom |
| CN111110911A (en) * | 2020-01-16 | 2020-05-08 | 福州大学 | High-strength biodegradable 3D printing molded prosthesis prosthetic limb device and preparation method thereof |
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Application publication date: 20150729 |