CN107163534A - A kind of height for laser direct forming flows fire-retardant PC resin and preparation method thereof - Google Patents
A kind of height for laser direct forming flows fire-retardant PC resin and preparation method thereof Download PDFInfo
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- CN107163534A CN107163534A CN201710386259.8A CN201710386259A CN107163534A CN 107163534 A CN107163534 A CN 107163534A CN 201710386259 A CN201710386259 A CN 201710386259A CN 107163534 A CN107163534 A CN 107163534A
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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
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- 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
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
Abstract
The present invention provides a kind of height for laser direct forming and flows fire-retardant PC resin and preparation method thereof, is related to technical field of polymer materials.The present invention flows fire-retardant PC resin for the height of laser direct forming and is made up of following raw material：PC resin, toughener, filler, laser activation agent, fire retardant, lubricant, the present invention flows fire-retardant PC resin for the height of laser direct forming has superhigh tenacity, and Laser Processing window is wide, and mobility is excellent, and heat endurance is good, good flame resistance.
Description
Technical field
The present invention relates to technical field of polymer materials, and in particular to a kind of height flowing for laser direct forming is fire-retardant
PC resin and preparation method thereof.
Background technology
Laser direct structuring technique, also referred to as LDS (Laser Direct Structuring) technology, is that a kind of specialty is radium-shine
Processing, injection and the production technology of Electroplating articles, its principle are to assign electric interconnection work(by common plastic cement element/circuit board
The functions such as support, the protection that, component function and plastic casing can be supported, and combined by mechanical entities and produced with conductive pattern
The functions such as raw shielding, antenna are incorporated into one, as electronic component is less and less, and laser forming technology can be directly in system
Part carries out circuit design in itself, and is used widely, and has been deep into industry-by-industry, including communication, and automobile, electronics is medical,
Chip, unmanned plane, the field such as precision manufactureing.
Laser direct structuring technique includes two steps, and one is laser activation, and two be chemical plating.In the presence of laser,
Laser activation agent it is destructurized, the adhering metal particle discharged forms gold in the resin surface crossed by laser ablation
Belong to core.It is follow-up without electrochemical plating during, metallic core promotes the metal ion deposition in plating solution in laser scanning
Region, formed metallic film.Due to the presence of metal ion in material, the heat endurance of material in itself is material property quality
Key, material can change colour in the bad injection moulding process of material heat endurance, it is impossible to meet continuous production needs；Coating after chemical plating
Adhesion be also a key factor, the not strong material of adhesion occurs that coating comes off in use, it is impossible to use.
As materials application scope is more and more wider, the requirement for material flowability is improved constantly, for fire-retardant requirement
Also how more and more higher, therefore, meet high flame resistance and high fluidity, and heat endurance can be taken into account again and coating is combined
Power, is a priority and difficulty problem in current LDS design of material.
The content of the invention
In view of the shortcomings of the prior art, the present invention provide a kind of fire-retardant PC resin of height flowing for laser direct forming and its
Preparation method, material heat endurance, stream can not be taken into account by solving conventional laser straight forming makrolon material in the prior art
The technical problem of dynamic property and anti-flammability.
To realize object above, technical scheme is achieved by the following technical programs：
A kind of height for laser direct forming flows fire-retardant PC resin, and the high fire-retardant PC resin of flowing is by following weight
The raw material of part is made：40-95 parts of PC resin, 2-6 parts of toughener, 0-45 parts of filler, 4-10 parts of laser activation agent, fire retardant 0-
15 parts, 0.2-1 parts of lubricant.
It is preferred that, the PC resin is the polycarbonate resin of melting means 10g/10min under the conditions of 300 DEG C/1.2kg.
It is preferred that, the toughener is core shell structure silicon systems toughener.
It is preferred that, the laser activation agent is one in molysite, cobalt salt, nickel salt, mantoquita, aluminium salt, the organic complex of chromium
Kind or a variety of mix.
It is preferred that, the laser activation agent is that the organic complex of mantoquita and chromium is mixed, and mantoquita and chromium is organic
The weight ratio of complex compound is 1：4.
It is preferred that, the mantoquita is cupric phosphate.
It is preferred that, the filler be talcum powder, wollastonite, glass fibre, carbon fiber, whisker, montmorillonite at least
It is a kind of.
It is preferred that, the fire retardant is perfluorobutyl potassium sulfonate, bisphenol-A double (diphenyl phosphoester), phosphor nitrogen combustion inhibitor, poly-
At least one of tetrafluoroethene.
It is preferred that, the lubricant is at least one of ethylene bis stearamide, silicone, pentaerythritol stearate.
A kind of height for laser direct forming flows the preparation method of fire-retardant PC resin, comprises the following steps：
S1, according to parts by weight each raw material is weighed, filler, toughener, laser activation agent, fire retardant, lubricant are added
Enter and 2-5min is blended in mixer, add PC resin, mix 1-3min, obtain mixed material；
S2, mixed material made from step S1 melted through double screw extruder, kneads, extrude, cooling down, pelletizing, packaging,
；Wherein the screw cylinder temperature setting of double screw extruder is 240-280 DEG C, and melt temperature is set to 250-270 DEG C.
The present invention provides a kind of height for laser direct forming and flows fire-retardant PC resin and preparation method thereof, with existing skill
Art is compared to advantage：
High flowing fire retardation PC resin material of the present invention for laser direct forming, mobility and excellent heat stability, resistance
Fire performance splendid, after raw material is mixed step by step using PC resin, toughener, filler, laser activation agent, fire retardant, lubricant,
It is made and flows fire-retardant PC resin for the height of laser direct forming, heat endurance is good in process for the resin material, when long
Between process nondiscolouring, mobility is high, meets thin wall parts demand, excellent fireproof performance, and up to UL940.8mm V-0, laser adds
Work window is wide, can be processed in the range of rated power 40-80%, changes binding force of cladding material after plating good；
Laser activation agent can constitute stable structure with PC resin matrix in raw material of the present invention, will not cause resin point
Solution so that material heat endurance is good, heat is stopped and will not changed colour at 300 DEG C, and material has superhigh tenacity, and fire resistance is excellent
Different, meeting high fire-retardance zone material demand expires.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, with reference to the embodiment of the present invention pair
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of the invention
Embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound
The every other embodiment obtained under the premise of the property made work, belongs to the scope of protection of the invention.
In embodiment, method of testing：Mechanics Performance Testing, distinguishes according to ASTM D638, ASTM D790, ASTM D256
The test of mechanical property such as stretched, bent, being impacted.
The test of combustibility：Fire resistance test is carried out according to UL-94 standards.
Hundred lattice are tested：100 1mm*1mm grid is cut on metallic film with cutter, with 3M 610 or equal
Place vertical pull-up after 2min after the adhesive tape sticking of viscosity, metallic film comes off area<5% is qualified.
Thermal stability evaluation：Heat stops analysis in injection machine at 300 DEG C, and heat is stopped at intervals of 2min, stops 5 mould colors
It is constant and occur without decomposition spray be OK.
Embodiment 1：
The fire-retardant PC resin of height flowing that the present embodiment is used for laser direct forming is made up of the raw material of following parts by weight：Poly- carbon
61 parts of acid ester resin, 4 parts of toughener, 8 parts of laser activation agent, 12 parts of bisphenol-A double (diphenyl phosphoester) is 15 parts of talcum powder, poly-
0.6 part of tetrafluoroethene, 0.4 part of ethylene bis stearamide lubricant；Wherein laser activation agent is cupric phosphate；
The present embodiment is used for the preparation method of the fire-retardant PC resin of height flowing of laser direct forming, comprises the following steps：
S1, according to parts by weight each raw material is weighed, filler, toughener, laser activation agent, fire retardant, lubricant are added
Enter and 3min is blended in mixer, add PC resin, mix 2min, obtain mixed material；
S2, mixed material made from step S1 melted through double screw extruder, kneads, extrude, cooling down, pelletizing, packaging,
；Wherein the screw cylinder temperature setting of double screw extruder is 260 DEG C, and melt temperature is set to 260 DEG C.
Embodiment 2：
The fire-retardant PC resin of height flowing that the present embodiment is used for laser direct forming is made up of the raw material of following parts by weight：Poly- carbon
36 parts of acid ester resin, 3.5 parts of toughener, 7 parts of laser activation agent, 10 parts of bisphenol-A double (diphenyl phosphoesters), phosphorus-nitrogen containing flame retardant
3 parts, 40 parts of glass fibre, 0.8 part of polytetrafluoroethylene (PTFE), 0.2 part of silicone lubricant；Wherein laser activation agent is cupric phosphate and nicotinic acid
The weight ratio of chromium complex is 1：4 mix；
The present embodiment is used for the preparation method of the fire-retardant PC resin of height flowing of laser direct forming, comprises the following steps：
S1, according to parts by weight each raw material is weighed, filler, toughener, laser activation agent, fire retardant, lubricant are added
Enter and 3min is blended in mixer, add PC resin, mix 2min, obtain mixed material；
S2, mixed material made from step S1 melted through double screw extruder, kneads, extrude, cooling down, pelletizing, packaging,
；Wherein the screw cylinder temperature setting of double screw extruder is 260 DEG C, and melt temperature is set to 260 DEG C.
Embodiment 3：
The fire-retardant PC resin of height flowing that the present embodiment is used for laser direct forming is made up of the raw material of following parts by weight：Poly- carbon
73 parts of acid ester resin, 3 parts of toughener, 7 parts of laser activation agent, 9 parts of bisphenol-A double (diphenyl phosphoesters), phosphorus-nitrogen containing flame retardant 3
Part, 5 parts of talcum powder, 0.6 part of polytetrafluoroethylene (PTFE), 0.5 part of pentaerythritol stearate lubricant；Wherein laser activation agent is phosphoric acid
Copper；
The present embodiment is used for the preparation method of the fire-retardant PC resin of height flowing of laser direct forming, comprises the following steps：
S1, according to parts by weight each raw material is weighed, filler, toughener, laser activation agent, fire retardant, lubricant are added
Enter and 3min is blended in mixer, add PC resin, mix 2min, obtain mixed material；
S2, mixed material made from step S1 melted through double screw extruder, kneads, extrude, cooling down, pelletizing, packaging,
；Wherein the screw cylinder temperature setting of double screw extruder is 260 DEG C, and melt temperature is set to 260 DEG C.
Embodiment 4：
The fire-retardant PC resin of height flowing that the present embodiment is used for laser direct forming is made up of the raw material of following parts by weight：Poly- carbon
92 parts of acid ester resin, 3 parts of toughener, 4 parts of laser activation agent, 0.02 part of perfluorobutyl potassium sulfonate, 0.4 part of polytetrafluoroethylene (PTFE), silicon
0.2 part of ketone lubricant, 0.5 part of pentaerythritol stearate lubricant；Wherein laser activation agent is cupric phosphate and nicotinic acid chromium complex
Weight ratio be 1：4 mix；
The present embodiment is used for the preparation method of the fire-retardant PC resin of height flowing of laser direct forming, comprises the following steps：
S1, according to parts by weight each raw material is weighed, filler, toughener, laser activation agent, fire retardant, lubricant are added
Enter and 3min is blended in mixer, add PC resin, mix 2min, obtain mixed material；
S2, mixed material made from step S1 melted through double screw extruder, kneads, extrude, cooling down, pelletizing, packaging,
；Wherein the screw cylinder temperature setting of double screw extruder is 260 DEG C, and melt temperature is set to 260 DEG C.
Embodiment 5：
The fire-retardant PC resin of height flowing that the present embodiment is used for laser direct forming is made up of the raw material of following parts by weight：Poly- carbon
54 parts of acid ester resin, 5 parts of toughener, 9 parts of laser activation agent, 12 parts of bisphenol-A double (diphenyl phosphoesters), phosphorus-nitrogen containing flame retardant 2
Part, 0.6 part of polytetrafluoroethylene (PTFE), 20 parts of carbon fiber, 0.5 part of pentaerythritol stearate lubricant；Wherein laser activation agent is phosphorus
Sour copper；
The present embodiment is used for the preparation method of the fire-retardant PC resin of height flowing of laser direct forming, comprises the following steps：
S1, according to parts by weight each raw material is weighed, filler, toughener, laser activation agent, fire retardant, lubricant are added
Enter and 3min is blended in mixer, add PC resin, mix 2min, obtain mixed material；
S2, mixed material made from step S1 melted through double screw extruder, kneads, extrude, cooling down, pelletizing, packaging,
；Wherein the screw cylinder temperature setting of double screw extruder is 260 DEG C, and melt temperature is set to 260 DEG C.
Embodiment 6：
The fire-retardant PC resin of height flowing that the present embodiment is used for laser direct forming is made up of the raw material of following parts by weight：Poly- carbon
61 parts of acid ester resin, 2 parts of toughener, 7 parts of laser activation agent, 15 parts of bisphenol-A double (diphenyl phosphoesters), polytetrafluoroethylene (PTFE) 0.6
Part, 15 parts of wollastonite, 0.5 part of pentaerythritol stearate lubricant；Wherein laser activation agent is cupric phosphate；
The present embodiment is used for the preparation method of the fire-retardant PC resin of height flowing of laser direct forming, comprises the following steps：
S1, according to parts by weight each raw material is weighed, filler, toughener, laser activation agent, fire retardant, lubricant are added
Enter and 3min is blended in mixer, add PC resin, mix 2min, obtain mixed material；
S2, mixed material made from step S1 melted through double screw extruder, kneads, extrude, cooling down, pelletizing, packaging,
；Wherein the screw cylinder temperature setting of double screw extruder is 260 DEG C, and melt temperature is set to 260 DEG C.
Embodiment 7：
The fire-retardant PC resin of height flowing that the present embodiment is used for laser direct forming is made up of the raw material of following parts by weight：PC trees
40 parts of fat, 2 parts of toughener, 4 parts of laser activation agent, 15 parts of fire retardant, 0.2 part of lubricant；Wherein laser activation agent is ferric phosphate；
Fire retardant is perfluorobutyl potassium sulfonate, bisphenol-A double (diphenyl phosphoesters), phosphor nitrogen combustion inhibitor, polytetrafluoroethylene (PTFE) are mixed；Profit
Lubrication prescription is ethylene bis stearamide, silicone, pentaerythritol stearate are mixed；
The present embodiment is used for the preparation method of the fire-retardant PC resin of height flowing of laser direct forming, comprises the following steps：
S1, according to parts by weight each raw material is weighed, filler, toughener, laser activation agent, fire retardant, lubricant are added
Enter and 2min is blended in mixer, add PC resin, mix 1min, obtain mixed material；
S2, mixed material made from step S1 melted through double screw extruder, kneads, extrude, cooling down, pelletizing, packaging,
；Wherein the screw cylinder temperature setting of double screw extruder is 240 DEG C, and melt temperature is set to 250 DEG C.
Embodiment 8：
The fire-retardant PC resin of height flowing that the present embodiment is used for laser direct forming is made up of the raw material of following parts by weight：PC trees
95 parts of fat, 6 parts of toughener, 45 parts of filler, 10 parts of laser activation agent, 1 part of lubricant；Wherein laser activation agent is nickel phosphate；
Filler is that carbon fiber, whisker, montmorillonite are mixed；Fire retardant is perfluorobutyl potassium sulfonate；Filler is montmorillonite；Lubrication
Agent is silicone；
The present embodiment is used for the preparation method of the fire-retardant PC resin of height flowing of laser direct forming, comprises the following steps：
S1, according to parts by weight each raw material is weighed, filler, toughener, laser activation agent, fire retardant, lubricant are added
Enter and 5min is blended in mixer, add PC resin, mix 3min, obtain mixed material；
S2, mixed material made from step S1 melted through double screw extruder, kneads, extrude, cooling down, pelletizing, packaging,
；Wherein the screw cylinder temperature setting of double screw extruder is 280 DEG C, and melt temperature is set to 270 DEG C.
The high flowing fire retardation PC resin sample for being used for laser direct forming prepared by above-described embodiment 1- embodiments 6 is carried out
Mechanics Performance Testing, combustibility test, the test of hundred lattice, thermal stability evaluation, test result are as shown in table 1：
The different properties of sample test results of table 1
In summary, the present invention is good for the fire-retardant PC resin heat endurance of height flowing of laser direct forming, hot at 300 DEG C
Stop will not change colour, and laser activation agent can constitute rock-steady structure with resin matrix, will not cause resin decomposition.Meanwhile, this hair
The excellent fireproof performance of the bright high flowing fire retardation PC resin material for laser direct forming, can reach 0.8mm V-0, meets high
Flame retardant area materials demand.
It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although ginseng
The present invention is described in detail according to previous embodiment, it will be understood by those within the art that：It still can be with
Technical scheme described in foregoing embodiments is modified, or equivalent substitution is carried out to which part technical characteristic；And
These modifications are replaced, and the essence of appropriate technical solution is departed from the spirit and model of various embodiments of the present invention technical scheme
Enclose.
Claims (10)
1. a kind of height for laser direct forming flows fire-retardant PC resin, it is characterised in that the high fire-retardant PC resin of flowing
It is made up of the raw material of following parts by weight：40-95 parts of PC resin, 2-6 parts of toughener, 0-45 parts of filler, laser activation agent 4-10
Part, 0-15 parts of fire retardant, 0.2-1 parts of lubricant.
2. the high fire-retardant PC resin of flowing according to claim 1, it is characterised in that：The PC resin is 300 DEG C/1.2kg
Under the conditions of melting means 10g/10min polycarbonate resin.
3. the high fire-retardant PC resin of flowing according to claim 1, it is characterised in that：The toughener is core shell structure silicon systems
Toughener.
4. the high fire-retardant PC resin of flowing according to claim 1, it is characterised in that：The laser activation agent is molysite, cobalt
One or more in salt, nickel salt, mantoquita, aluminium salt, the organic complex of chromium are mixed.
5. the high fire-retardant PC resin of flowing according to claim 4, it is characterised in that：The laser activation agent is mantoquita and chromium
Organic complex mix, and the organic complex of mantoquita and chromium weight ratio be 1：4.
6. the height according to claim 4 or 5 flows fire-retardant PC resin, it is characterised in that：The mantoquita is cupric phosphate.
7. the high fire-retardant PC resin of flowing according to claim 1, it is characterised in that：The filler is talcum powder, silicon ash
At least one of stone, glass fibre, carbon fiber, whisker, montmorillonite.
8. the high fire-retardant PC resin of flowing according to claim 1, it is characterised in that：The fire retardant is perfluoro butyl sulfonic acid
At least one of potassium, bisphenol-A double (diphenyl phosphoester), phosphor nitrogen combustion inhibitor, polytetrafluoroethylene (PTFE).
9. the high fire-retardant PC resin of flowing according to claim 1, it is characterised in that：The lubricant is ethylene stearic bicine diester
At least one of amine, silicone, pentaerythritol stearate.
10. the preparation method of the high fire-retardant PC resin of flowing as described in any in a kind of 1-9 such as claim, it is characterised in that including
Following steps：
S1, according to parts by weight each raw material is weighed, filler, toughener, laser activation agent, fire retardant, lubricant are added mixed
2-5min is blended in conjunction machine, PC resin is added, mixes 1-3min, obtains mixed material；
S2, mixed material made from step S1 melted through double screw extruder, kneads, extrude, cooling down, pelletizing, packaging, i.e.,
Can；Wherein the screw cylinder temperature setting of double screw extruder is 240-280 DEG C, and melt temperature is set to 250-270 DEG C.
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| CN201710386259.8A CN107163534A (en) | 2017-05-26 | 2017-05-26 | A kind of height for laser direct forming flows fire-retardant PC resin and preparation method thereof |
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| CN201710386259.8A CN107163534A (en) | 2017-05-26 | 2017-05-26 | A kind of height for laser direct forming flows fire-retardant PC resin and preparation method thereof |
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| CN109575554A (en) * | 2018-10-30 | 2019-04-05 | 中广核高新核材科技（苏州）有限公司 | High finished product rate laser direct forming LDS composite material and preparation method |
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| WO2020126189A1 (en) * | 2018-12-19 | 2020-06-25 | Mep Europe B.V. | Polycarbonate composition for laser direct structuring |
| CN113861651A (en) * | 2021-08-20 | 2021-12-31 | 天津金发新材料有限公司 | Polycarbonate composition and preparation method and application thereof |
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| CN110204881A (en) * | 2019-06-27 | 2019-09-06 | 大河宝利材料科技(苏州)有限公司 | A kind of fire-retardant polycarbafil composite material and preparation method of the excellent carbon fiber in surface |
| CN113861651A (en) * | 2021-08-20 | 2021-12-31 | 天津金发新材料有限公司 | Polycarbonate composition and preparation method and application thereof |
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