CN102875990B - High-performance polycarbonate alloy prepared by waste polycarbonate resin and preparation method and application thereof - Google Patents
High-performance polycarbonate alloy prepared by waste polycarbonate resin and preparation method and application thereof Download PDFInfo
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- CN102875990B CN102875990B CN201210328155.9A CN201210328155A CN102875990B CN 102875990 B CN102875990 B CN 102875990B CN 201210328155 A CN201210328155 A CN 201210328155A CN 102875990 B CN102875990 B CN 102875990B
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- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
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- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
Abstract
The invention discloses a high-performance polycarbonate alloy prepared by waste polycarbonate resin and a preparation method and an application of the high-performance polycarbonate alloy. The polycarbonate alloy comprises the following material components by weight: 96-97 parts of waste polycarbonate crushed materials, 0.05-0.1 part of fire retardant FR2025, 0.2-0.4 part of B-215 long-acting heat stabilizer, 2-4 parts of thermoplastic styrene butadiene rubber (SBS) flexibilizer and 0.1-0.2 part of anti-dropping fire retardant SN3300. The polycarbonate alloy provided by the invention has the characteristics of high performance, high flame retardance, high impact resistance, high coldness resistance, high stability and static electricity resistance and the like, can be used for manufacturing various charger housings, switch panels, and the like.
Description
Technical field
The present invention relates to technical field of polymer materials, relate in particular to plastic waste re-using technology, be specifically related to utilize waste and old polycarbonate material to prepare the technology of high performance polycarbonate alloy.
Background technology
Polycarbonate (PC) is a kind of general common plastics, contain carbonate group, can be divided into aliphatics according to the structure of ester group, the broad varietys such as aromatic series, it is a kind of water white indefiniteness thermoplastic material, its chemical property is weak acid resistant, resistance to weak base, resistance to neutral oil, not ultraviolet resistance and not resistance to highly basic, and its physical properties is linear expansivity: 38 × 10cm/cm
2, 135 ℃ of thermal change type temperature, there is poor stability, exist stress be easy to split, low on breach anti-impact force, wear no resistance, the shortcoming such as, viscosity low on metalwork bounding force is large, poor fluidity and impact processing injection moulding.
Because polycarbonate is the material of relatively commonly using, so can produce a large amount of waste and old or substandard products material, recovery article, mainly contain following several method for the processing of waste material, substandard products or recovery article at present:
(1) burning or land-fill method, owing to can produce the obnoxious flavoures such as sulfurous gas in burning process, very easily causes environmental pollution, and take land-fill method, the refractory organics of polycarbonate also can cause very large harm to environment, also causes land wastage, and current this mode is progressively eliminated;
(2) waste material, substandard products or recovery article being carried out to simple recovery takes out grain and does not carry out any science modification, being downgraded to common plastics uses, although solved problem of environmental pollution, fail to make full use of the economic worth of these defective materials, and seriously cause the product of inferior quality to occur.
Therefore, how to reclaim and fully use these waste materials, substandard products or recovery article, promote and make it to produce after regeneration new economic benefit and output quality matetrial to reproduce famous-brand and high-quality goods are problems of benefiting the nation and the people through scientific approach.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, providing a kind of is that major ingredient preparation obtain by waste electrical equipment class polycarbonate material and waste and old water bottle class polycarbonate material, has high-performance, high flame retardant, high-impact, highly resists cold, the high performance polycarbonate alloy of high stability and the feature such as antistatic.
Another object of the present invention is to provide the preparation method of above-mentioned polycarbonate alloy.
Another object of the present invention is to provide above-mentioned polycarbonate alloy in the application of preparing in charger shell, switch panel.
Above-mentioned purpose of the present invention is achieved by following scheme:
A high performance polycarbonate alloy of being prepared by waste and old polycarbonate material, its composition of raw materials is made up of the each component of following parts by weight:
96～97 parts of waste and old polycarbonate crushed materials;
0.05～0.1 part of fireproofing agent FR2025;
0.2～0.4 part of the long-acting thermo-stabilizer of B-215;
2～4 parts of SBS toughner;
0.1～0.2 part of anti-dripping agent SN3300.
In above-mentioned raw materials formula, described waste and old polycarbonate crushed material is the crushed material that particle diameter that waste and old polycarbonate material is obtained after pulverization process is less than or equal to 10mm; Described waste and old polycarbonate material refers to waste electrical equipment or the waste and old water bottle prepared by pure polycarbonate, and accounts for by polycarbonate content waste electrical equipment or the waste and old water bottle that more than 95% material is manufactured, as useless charger, useless switch panel or useless mineral water bottle etc.
In above-mentioned raw materials formula, the inventor finds by research, waste and old polycarbonate crushed material is as major ingredient, the size of its particle diameter has impact to a certain degree to realization of the present invention, if pellet is excessive, compounding effect is poor, impact stirs, affect the melting mixing in production technique, therefore by after research, contriver determines that the particle diameter of controlling waste and old polycarbonate crushed material is for being less than or equal to 10mm.
In above-mentioned raw materials formula, described fireproofing agent FR2025 is commercially available prod, and fireproofing agent FR2025 is environmental protection fire retarding agent, plays in the present invention the effect of fire retardant.
In above-mentioned raw materials formula, the long-acting thermo-stabilizer of described B-215 is commercially available prod, and effect is in the present invention heat resistanceheat resistant, resist oxygen aging, prevents base material thermooxidative degradation, keeps material flow index, prevents the oxidation of course of processing polymkeric substance and solve the reduced viscosity of waste and old base material, the problem that gloss is degenerated.
In above-mentioned raw materials formula, described SBS toughner is commercially available prod, play in the present invention toughness reinforcing effect, can solve well the problem of old material toughness deficiency, and play the winter hardiness, flexing, toughness, thermotolerance and the shock proof effect that improve polymkeric substance.
In above-mentioned raw materials formula, described anti-dripping agent SN3300 is commercially available prod, plays in the present invention the effect that strengthens cohesive force, has tint permanence and stable color and luster continuity well, improves gloss, reduces die wear, strengthens fire-retardant and drippage while preventing from burning and solve the problem such as cohesive force deficiency of old material.
The preparation method of above-mentioned a kind of high performance polycarbonate alloy of being prepared by waste and old polycarbonate material, it comprises the steps:
The preparation of the waste and old polycarbonate crushed material of step 1.
Collect waste and old polycarbonate material, use cuts the waste and old polycarbonate material that machine exceedes 600mm to length and cuts, after making to cut, its length is less than 600mm, the waste and old polycarbonate material that the more waste and old polycarbonate material after cutting and length is no more than to 600mm is together sent on pulverizer and is pulverized, obtaining the particle that granularity is less than or equal to 10mm, is required waste and old polycarbonate crushed material;
After being repeatedly uniformly mixed in waste and old polycarbonate crushed material, the long-acting thermo-stabilizer of fireproofing agent FR2025, B-215, SBS toughner and anti-dripping agent SN3300 threading stirrer that step 2. is prepared step 1 according to above-mentioned raw materials formula, send in twin screw extruder; at the temperature of 240～290 ℃, carry out melting mixing; after gained melt is extruded by twin screw extruder; cooling through tank; introduce dicing machine and carry out pelletizing operation, collect pellet and be polycarbonate alloy required for the present invention.
In above-mentioned steps 1, the waste and scrap that purchase is come is selected confirmation, selects waste electrical equipment or the waste and old water bottle prepared by pure polycarbonate, and accounts for by polycarbonate content waste electrical equipment or the waste and old water bottle that more than 95% material is manufactured; Send waste and old polycarbonate material to pulverizer and pulverize, it is 22kw～30kw that pulverizer requires power of motor, and rotating speed is 1400 revs/min, is 700 revs/min by transmitting speed change cutter rotating speed.
In above-mentioned steps 1, described pulverizer is provided with screen cloth, and the particle after pulverizing is screened, and can not again putting into by the particle of screen cloth, pulverizer is pulverized and screening process again, is waste and old polycarbonate crushed material by the particle of screen cloth; Mesh diameter on described screen cloth is 10mm.
In above-mentioned steps 2, describedly in stirrer, repeatedly stir and refer to and repeatedly stir three times, each churning time is one hour.
In above-mentioned steps 2, the rotating speed of described stirrer adopts 650～700 revs/min; The inventor finds by research: if stirrer rotating speed is too fast, material can cracking, if stirrer rotating speed too slowly, can mix again inhomogeneously, is therefore 650～700 revs/min by studying the rotating speed of rear selection stirrer.
In above-mentioned steps 2, the rotating speed of twin screw extruder is 250～400 revs/min.
In above-mentioned steps 2, it is 240～290 ℃ that melting mixing adopts temperature; The inventor finds after deliberation: if the temperature of melting mixing is too low, melting is bad, if temperature is too high, and material meeting cracking, therefore, by selecting after research, the temperature of melting mixing is 240～290 ℃.
In above-mentioned steps 2, the melt of being extruded by twin screw extruder is in the time that tank is cooling, and tank temperature used is 60～80 ℃; The inventor finds by research, the cooling temperature of tank also can have certain influence to product herein, if tank temperature is too low, between pellet, space is excessive and frangible, if tank excess Temperature, pellet easily bonds, therefore, after tank temperature is optimized, it is 60～80 ℃ that the inventor selects for the tank temperature of cold fuse-element.
In above-mentioned preparation method, the rotating speed of dicing machine is 600～900 revs/min; The inventor finds by research, if dicing machine rotating speed is excessively slow, pellet is can be too loose, if dicing machine rotating speed is too fast, pellet can be too little, and therefore, it is suitable that the rotating speed of dicing machine need to be adjusted, otherwise all can have impact to final pellet attractive in appearance; To this, the inventor is optimized adjustment to the rotating speed of dicing machine, and the rotating speed of finally selecting dicing machine is 600～900 revs/min.
A kind of high performance polycarbonate alloy of being prepared by waste and old polycarbonate material of the present invention is carried out to performance test, find that this alloy has high-performance, high flame retardant, high-impact, high cold-resistant, high stability and the feature such as antistatic, can be used for preparing charger shell, switch panel etc.
Due to charger, switch panel, it has certain color requirement, thus polycarbonate alloy of the present invention in for the preparation of charger, switch panel, waste and old polycarbonate material will be classified to the requirement of color, selects allotment according to product requirement.And when polycarbonate alloy of the present invention is for the preparation of charger black housing time, the color of waste and old polycarbonate material is not carried out to requirement.
Compared with prior art, the present invention has following beneficial effect:
1. polycarbonate alloy of the present invention, in its raw material, adopt waste and old polycarbonate material to replace polycarbonate raw material, in order to guarantee the excellent property of the finished product, the inventor is for the auxiliary agent that it is suitable that the feature of waste and old polycarbonate material has been arranged in pairs or groups, and the consumption of each auxiliary agent is optimized, the selection of each auxiliary agent makes waste electrical equipment polycarbonate material also can prepare the carbonate polymer of excellent property, realize environmental friendly regenerated resource recycling, whole process is accomplished energy-conservation, reduce discharging, environmental protection resource recovery, for reducing environmental pollution, national save energy contributes,
2. polycarbonate alloy of the present invention, its property indices all meets or exceeds the standard of national electrical apparatus industry, solve waste electrical equipment to environmental influence and the problem to land seizure, solve and simply taken out the problem that grain causes the market industry product of inferior quality to occur, the shortcomings such as poor adhesion, poor fluidity and the processing difficulties of pure raw materials viscosity greatly, to metal are solved, also solved polycarbonate raw material exist be easy to stress cracking, stability is low, more responsive for breach, and the problem such as wear resistance is not good enough;
3. prior art is utilized carbonate polymer prepared by waste electrical equipment class polycarbonate material, and it stretches the about 615kgf/cm of tensile strength
2, the about 895kgf/cm of flexural strength
2, and its notched Izod impact strength of polycarbonate alloy of the present invention (23 ℃) reaches 62kgcm/cm, bending modulus reaches 22515kgf/cm
2, and product to reach type body stable, be that current charger shell and switch panel meet most the most stable material modified;
4. the preparation method of carbonate polymer of the present invention, according to the feature of its formula materials, to its Raw material processing crushing, stirring, mixture control rotating speed, rotating speed and the temperature of twin screw extruder are optimized, thereby have guaranteed to prepare the premium properties of resulting polymers.
Embodiment
Below in conjunction with specific embodiment, the present invention is done further and described, but specific embodiment does not do any restriction to the present invention.
embodiment 1
A high performance polycarbonate alloy of being prepared by waste and old polycarbonate material, its composition of raw materials is made up of the each component of following parts by weight:
96 parts of waste and old polycarbonate crushed materials;
0.05 part of fireproofing agent FR2025;
0.2 part of the long-acting thermo-stabilizer of B-215;
3 parts of SBS toughner;
0.2 part of anti-dripping agent SN3300.
In above-mentioned raw materials formula, described waste and old polycarbonate crushed material is the crushed material that particle diameter that waste and old polycarbonate material is obtained after pulverization process is less than or equal to 10mm; Described waste and old polycarbonate material refers to waste electrical equipment or the waste and old water bottle prepared by pure polycarbonate, and accounts for by polycarbonate content waste electrical equipment or the waste and old water bottle that more than 95% material is manufactured, as useless charger, useless switch panel, useless mineral water bottle etc.
In above-mentioned raw materials formula, described fireproofing agent FR2025, the long-acting thermo-stabilizer of B-215, SBS toughner and anti-dripping agent SN3300 are commercially available prod.
Above-mentioned a kind of high performance polycarbonate alloy of being prepared by waste and old polycarbonate material, its preparation method comprises the steps:
The preparation of the waste and old polycarbonate crushed material of step 1.
Collect waste and old polycarbonate material, use cuts the waste and old polycarbonate material that machine exceedes 600mm to length and cuts, after making to cut, its length is less than 600mm, the waste and old polycarbonate material that the more waste and old polycarbonate material after cutting and length is no more than to 600mm is together sent on pulverizer and is pulverized, obtaining the particle that granularity is less than or equal to 10mm, is required waste and old polycarbonate crushed material;
The waste and old polycarbonate crushed material that step 2. is prepared step 1 according to above-mentioned raw materials formula, fireproofing agent FR2025, the long-acting thermo-stabilizer of B-215, SBS toughner and anti-dripping agent SN3300 put in vertical cylinder type stainless steel appearance body stirrer and repeatedly stir three times, each churning time is one hour, stirrer rotating speed is 700 revs/min, after mixing, send in twin screw extruder, it is 400 revs/min at the rotating speed of twin screw extruder, temperature is to carry out melting mixing under the condition of 250 ℃, after gained melt is extruded by twin screw extruder, cooling through 70 ℃ of tanks, the dicing machine of introducing rotating speed again and be 600 revs/min carries out pelletizing operation, collect pellet and be the required polycarbonate alloy of the present embodiment.
In above-mentioned steps 1, the waste and scrap that purchase is come is selected confirmation, selects waste electrical equipment or the waste and old water bottle prepared by pure polycarbonate, and accounts for by polycarbonate content waste electrical equipment or the waste and old water bottle that more than 95% material is manufactured; Send waste and old polycarbonate material to pulverizer and pulverize, it is 22kw～30kw that pulverizer requires power of motor, and rotating speed is 1400 revs/min, is 700 revs/min by transmitting speed change cutter rotating speed.
The polycarbonate alloy that adopts ASTM international standard to prepare the present embodiment carries out performance test, and result is as shown in table 1.
The performance test results of the polycarbonate alloy of table 1 embodiment 1
| Character | Method | Unit | Data |
| Proportion | ASTM D792 | — | 1.22 |
| Mould shrinks | ASTM D955 | % | 0.5 |
| Tensile strength | ASTM D638 | Kg/c㎡ | 615 |
| Flexural strength | ASTM D638 | Kg/c㎡ | 895 |
| Unit elongation | ?ASTM D90 | % | 100 |
| Bending modulus | ASTM D90 | Kg/c㎡ | 22515 |
| Notched Izod impact strength (1/8 ") (23 ℃) | ASTM D256 | Kg·㎝/㎝ | 62 |
| Heat-drawn wire | ASTM D648 | ℃ | 125 |
| Flame resistivity | UL94 | (1/8") | V0 |
| Drying temperature | — | ℃ | 120 |
| Time of drying | — | HR | 4 |
| Melt temperature | — | ℃ | 230～270 |
| Suggestion mould temperature | — | ℃ | 80 |
As can be seen from Table 1, polycarbonate alloy prepared by the present embodiment has reached the standard of materials requirement of national electrical apparatus industry to charger shell, switch panel after testing, has realized the object of energy-conservation, reduction of discharging, environmental protection, renewable resource utilization.
embodiment 2
A high performance polycarbonate alloy of being prepared by waste and old polycarbonate material, its composition of raw materials is made up of the each component of following parts by weight:
97 parts of waste and old polycarbonate crushed materials;
0.1 part of fireproofing agent FR2025;
0.3 part of the long-acting thermo-stabilizer of B-215;
2 parts of SBS toughner;
0.1 part of anti-dripping agent SN3300.
In above-mentioned raw materials formula, described waste and old polycarbonate crushed material is the crushed material that particle diameter that waste and old polycarbonate material is obtained after pulverization process is less than or equal to 10mm; Described waste and old polycarbonate material refers to waste electrical equipment or the waste and old water bottle prepared by pure polycarbonate, and accounts for by polycarbonate content waste electrical equipment or the waste and old water bottle that more than 95% material is manufactured, as useless charger, useless switch panel, useless mineral water bottle etc.
In above-mentioned raw materials formula, described fireproofing agent FR2025, the long-acting thermo-stabilizer of B-215, SBS toughner and anti-dripping agent SN3300 are commercially available prod.
Above-mentioned a kind of high performance polycarbonate alloy of being prepared by waste and old polycarbonate material, its preparation method comprises the steps:
The preparation of the waste and old polycarbonate crushed material of step 1.
Collect waste and old polycarbonate material, use cuts the waste and old polycarbonate material that machine exceedes 600mm to length and cuts, after making to cut, its length is less than 600mm, the waste and old polycarbonate material that the more waste and old polycarbonate material after cutting and length is no more than to 600mm is together sent on pulverizer and is pulverized, obtaining the particle that granularity is less than or equal to 10mm, is required waste and old polycarbonate crushed material;
The waste and old polycarbonate crushed material that step 2. is prepared step 1 according to above-mentioned raw materials formula, fireproofing agent FR2025, the long-acting thermo-stabilizer of B-215, SBS toughner and anti-dripping agent SN3300 put in vertical cylinder type stainless steel appearance body stirrer and repeatedly stir three times, each churning time is one hour, stirrer rotating speed is 650 revs/min, after mixing, send in twin screw extruder, it is 400 revs/min at the rotating speed of twin screw extruder, temperature is to carry out melting mixing under the condition of 260 ℃, after gained melt is extruded by twin screw extruder, cooling through 80 ℃ of tanks, the dicing machine of introducing rotating speed again and be 900 revs/min carries out pelletizing operation, collect pellet and be the required polycarbonate alloy of the present embodiment.
In above-mentioned steps 1, the waste and scrap that purchase is come is selected confirmation, selects waste electrical equipment or the waste and old water bottle prepared by pure polycarbonate, and accounts for by polycarbonate content waste electrical equipment or the waste and old water bottle that more than 95% material is manufactured; Send waste and old polycarbonate material to pulverizer and pulverize, it is 22kw～30kw that pulverizer requires power of motor, and rotating speed is 1400 revs/min, is 700 revs/min by transmitting speed change cutter rotating speed.
The polycarbonate alloy that adopts ASTM international standard to prepare the present embodiment carries out performance test, and result is as shown in table 2.
The performance test results of the polycarbonate alloy of table 2 embodiment 2
| Character | Method | Unit | Data |
| Proportion | ASTM D792 | — | 1.2 |
| Mould shrinks | ASTM D955 | % | 0.6 |
| Tensile strength | ASTM D638 | Kg/c㎡ | 620 |
| Flexural strength | ASTM D638 | Kg/c㎡ | 900 |
| Unit elongation | ?ASTM D90 | % | 100 |
| Bending modulus | ASTM D90 | Kg/c㎡ | 23000 |
| Notched Izod impact strength (1/8 ") (23 ℃) | ASTM D256 | Kg·㎝/㎝ | 60 |
| Heat-drawn wire | ASTM D648 | ℃ | 128 |
| Flame resistivity | UL94 | (1/8") | V0 |
| Drying temperature | — | ℃ | 120 |
| Time of drying | — | HR | 4 |
| Melt temperature | — | ℃ | 240～280 |
| Suggestion mould temperature | — | ℃ | 80 |
As can be seen from Table 2, the polycarbonate alloy of the present embodiment has reached the standard of materials requirement of national electrical apparatus industry to charger shell, switch panel after testing, has realized the object of energy-conservation, reduction of discharging, environmental protection, renewable resource utilization.
Claims (1)
1. a preparation method for the polycarbonate alloy that can be used for charger or switch panel of being prepared by waste and old polycarbonate material, its composition of raw materials is made up of the each component of following parts by weight:
96 parts of waste and old polycarbonate crushed materials;
0.05 part of fireproofing agent FR2025;
0.2 part of the long-acting thermo-stabilizer of B-215;
3 parts of SBS toughner;
0.2 part of anti-dripping agent SN3300;
In above-mentioned raw materials formula, described waste and old polycarbonate crushed material is the crushed material that particle diameter that waste and old polycarbonate material is obtained after pulverization process is less than or equal to 10mm; Described waste and old polycarbonate material refers to waste electrical equipment or the waste and old water bottle prepared by pure polycarbonate, and accounts for by polycarbonate content waste electrical equipment or the waste and old water bottle that more than 95% material is manufactured;
Preparation method comprises the following steps:
Step 1: the preparation of waste and old polycarbonate crushed material
Collect waste and old polycarbonate material, use cuts the waste and old polycarbonate material that machine exceedes 600mm to length and cuts, after making to cut, its length is less than 600mm, the waste and old polycarbonate material that the more waste and old polycarbonate material after cutting and length is no more than to 600mm is together sent on pulverizer and is pulverized, obtaining the particle that granularity is less than or equal to 10mm, is waste and old polycarbonate crushed material;
Step 2: the waste and old polycarbonate crushed material of according to above-mentioned raw materials formula being prepared by step 1, fireproofing agent FR2025, the long-acting thermo-stabilizer of B-215, SBS toughner and anti-dripping agent SN3300 put in vertical cylinder type stainless steel appearance body stirrer and repeatedly stir three times, each churning time is one hour, stirrer rotating speed is 700 revs/min, after mixing, send in twin screw extruder, it is 400 revs/min at the rotating speed of twin screw extruder, temperature is to carry out melting mixing under the condition of 250 ℃, after gained melt is extruded by twin screw extruder, cooling through 70 ℃ of tanks, the dicing machine of introducing rotating speed again and be 600 revs/min carries out pelletizing operation, collect pellet and be polycarbonate alloy,
In above-mentioned steps 1, the waste and scrap that purchase is come is selected confirmation, selects waste electrical equipment or the waste and old water bottle prepared by pure polycarbonate, and accounts for by polycarbonate content waste electrical equipment or the waste and old water bottle that more than 95% material is manufactured; Send waste and old polycarbonate material to pulverizer and pulverize, it is 22kw～30kw that pulverizer requires power of motor, and rotating speed is 1400 revs/min, is 700 revs/min by transmitting speed change cutter rotating speed.
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