CN106398162A - Polycarbonate for warm-light LED lampshade and preparation method thereof - Google Patents
Polycarbonate for warm-light LED lampshade and preparation method thereof Download PDFInfo
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- CN106398162A CN106398162A CN201610870615.9A CN201610870615A CN106398162A CN 106398162 A CN106398162 A CN 106398162A CN 201610870615 A CN201610870615 A CN 201610870615A CN 106398162 A CN106398162 A CN 106398162A
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- 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
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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
- B29C48/92—Measuring, controlling or regulating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
- F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
- F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K2003/026—Phosphorus
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
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- 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
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Abstract
The invention provides a polycarbonate for a warm-light LED lampshade and a preparation method thereof. All raw materials are prepared into powdered polycarbonate, a mixture 1 and a mixture 2 respectively by adding a compound aluminum hydroxide agent, red phosphorus, alkali metal salt, boric acid, phosphate, light diffusion agent, light stabilizer and the like in a formula and adopting 3 steps, then the mixture 1 and the mixture 2 are mixed, then the powdered polycarbonate, the phosphate and the boric acid are added for three-stage stirring, and the three-stage stirring time and the stirring speed are strictly controlled, so that the prepared polycarbonate product for the warm-light LED lampshade has good light transmittance performance and flame retardant performance. An experiment proves that the light transmittance rate can be up to 85% after product coloring, the flame retardant performance can be up to V-0, and light is soft and non-dazzling.
Description
Technical field
The present invention relates to macromolecule engineering plastic applications, more particularly, to a kind of warm light LED lamp cover Merlon and its system
Preparation Method.
Background technology
Merlon (abbreviation PC) is the high molecular polymer containing carbonate group in strand, can according to the structure of ester group
It is divided into the polytypes such as aliphatic, aromatic series, aliphatic-aromatic.Due to the particularity on polycarbonate structure, become
Growth rate general engineering plastic the fastest in five large-engineering plastics.
Merlon has good fire resistance and high transmission rate, and good weatherability, hardness are high, shock resistance, heat resistanceheat resistant
Distortion performance is strong.Merlon is widely used in the fields such as building material industry, auto manufacturing, packaging industry, optical lens industry,
According to the difference using field, the various performance requirements of Merlon are also inconsistent.
In optical lens industry, Merlon is many to be used as lampshade, and the light transmittance of existing market Transparent lamp shade can reach
To 88-92%, the light transmittance of vaporific lampshade is in 70-86%.If a luminous flux not adding the fluorescent tube of lampshade is 2000lm, now
Only has 88% Transparent lamp shade to it plus light transmittance, then the luminous flux of its reality just only has the luminous flux of 1760lm.If giving
It is plus the Transparent lamp shade that light transmittance is 95%, then its actual luminous flux just have 1900lm it can be seen that, light transmittance is higher,
Actual luminous flux is higher.
And be to avoid light fixture can lead to dazzling phenomenon because uneven illumination is even in illumination, its lampshade typically also has warm
Light function, after through warm light lampshade, light becomes soft not dazzling to the light that lamp source sends, and is suitable for reading indefatigability.This
The warm light function of lampshade is the color by changing lampshade, absorbs different color light using different colours, then reaches the work(of warm light
Energy;And if typically common lampshade directly changes appearance color, can directly reduce the light transmittance of lampshade, 95% light transmittance
Lampshade be reach warm light function change appearance color after, its actual light transmittance may only have 60-70%, leads to this feelings
The main cause of condition is because that cover surface is coarse, or even has flow liner inside lampshade, therefore to be improved.
Content of the invention
In order to overcome the problems referred to above, the invention provides a kind of warm light LED lamp cover Merlon and preparation method thereof.
For achieving the above object, the technical scheme of present invention offer is:
A kind of warm light LED lamp cover Merlon, composition of raw materials is:
Merlon 86 weight portion
Compound aluminium hydroxide agent 1.2 weight portion
Red phosphorus 0.8 weight portion
Alkali metal salt 3 weight portion
Antioxidant 0.2 weight portion
Boric acid 0.7 weight portion
Phosphate 2.8 weight portion
Light diffusing agent 0.5-1 weight portion
Light stabilizer 0.5-1 weight portion;
Wherein, described Merlon is bisphenol A polycarbonate, and molecular weight is 26000-40000;
Wherein, the mass percent sum of above each component is 96%-100%.
A kind of preparation method of warm light LED lamp cover Merlon, comprises the following steps:
1)It is standby after Merlon addition engineering plastics pulverizer is pulverized;
2)Compound aluminium hydroxide agent, red phosphorus and alkali metal salt are uniformly added into macromolecular material stirring using automatic loading and unloading device
Machine is stirred, and mixing speed is 400r/min, and mixing time is 10min, obtains a compound;
3)Antioxidant, light diffusing agent and light stabilizer are uniformly added into macromolecular material mixer using automatic loading and unloading device enter
Row stirring, mixing speed is 420r/min, and mixing time is 20min, obtains No. two compounds;
4)By step 2)With step 3)The compound obtaining, No. two compounds add macromolecular material mixer to be stirred
Mix, mixing speed is 200r/min, mixing time is 50min;
5) in step 4)After the completion of stirring, it is uniformly added into pulverized polycarbonates, boric acid and phosphate using automatic loading and unloading device
Carry out three-stage stirring, the mixing speed of first paragraph stirring is 60-80r/min, and mixing time is 1-1.5h, second segment stirring
Mixing speed is 300-400r/min, and mixing time is 20-30min, and the mixing speed of the 3rd section of stirring is 300-400r/min,
Mixing time is 2-5h;
6)By step 5)The material mixing obtaining is put into engineering plastics extruder and is carried out extruding pelletization, obtains warm light LED
Lampshade polycarbonate products;Wherein, the extrusion temperature of independent segment is 280-300 DEG C, and the extrusion temperature of filling section is 300-350
DEG C, the extrusion temperature of engaged section is 290-320 DEG C, and vacuum during extruding pelletization processing is 0.6MPa-0.8MPa.
Technique scheme is beneficial in that:
The invention provides a kind of warm light LED lamp cover Merlon and preparation method thereof, by adding compound hydrogen in formula
Aluminum oxide agent, red phosphorus, alkali metal salt, boric acid, phosphate, light diffusing agent, light stabilizer etc., and will be all former by 3 steps
Material is respectively prepared pulverized polycarbonates, compound, No. two compounds, then by a compound and No. two compound mixing
After add pulverized polycarbonates, phosphate and boric acid and carry out three-stage stirring, and the mixing time to three-stage stirring and stirring
Mix the strict control of speed, you can so that the warm light LED lamp cover polycarbonate products that the present invention is obtained have preferable translucency
Energy and fire resistance, test proves that, after product is painted, its light transmittance highest can also reach 85%, and fire resistance reaches
V-0, and light becomes soft not dazzling.
Technical scheme is clearly and completely described it is clear that being retouched below in conjunction with specific embodiment
The embodiment stated is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this area
The every other embodiment that those of ordinary skill is obtained under the premise of not making creative work, broadly falls into present invention protection
Scope.
Specific embodiment
Embodiment 1
A kind of warm light LED lamp cover Merlon, composition of raw materials is:
Merlon 86 weight portion
Compound aluminium hydroxide agent 1.2 weight portion
Red phosphorus 0.8 weight portion
Alkali metal salt 3 weight portion
Antioxidant 0.2 weight portion
Boric acid 0.7 weight portion
Phosphate 2.8 weight portion
Light diffusing agent 0.5-1 weight portion
Light stabilizer 0.5-1 weight portion;
Wherein, described Merlon is bisphenol A polycarbonate, and molecular weight is 26000-40000;
Wherein, the mass percent sum of above each component is 96%-100%.
A kind of preparation method of warm light LED lamp cover Merlon, comprises the following steps:
1)It is standby after Merlon addition engineering plastics pulverizer is pulverized;
2)Compound aluminium hydroxide agent, red phosphorus and alkali metal salt are uniformly added into macromolecular material stirring using automatic loading and unloading device
Machine is stirred, and mixing speed is 400r/min, and mixing time is 10min, obtains a compound;
3)Antioxidant, light diffusing agent and light stabilizer are uniformly added into macromolecular material mixer using automatic loading and unloading device enter
Row stirring, mixing speed is 420r/min, and mixing time is 20min, obtains No. two compounds;
4)By step 2)With step 3)The compound obtaining, No. two compounds add macromolecular material mixer to be stirred
Mix, mixing speed is 200r/min, mixing time is 50min;
5) in step 4)After the completion of stirring, it is uniformly added into pulverized polycarbonates, boric acid and phosphate using automatic loading and unloading device
Carry out three-stage stirring, the mixing speed of first paragraph stirring is 60-80r/min, and mixing time is 1-1.5h, second segment stirring
Mixing speed is 300-400r/min, and mixing time is 20-30min, and the mixing speed of the 3rd section of stirring is 300-400r/min,
Mixing time is 2-5h;
6)By step 5)The material mixing obtaining is put into engineering plastics extruder and is carried out extruding pelletization, obtains warm light LED
Lampshade polycarbonate products;Wherein, the extrusion temperature of independent segment is 280-300 DEG C, and the extrusion temperature of filling section is 300-350
DEG C, the extrusion temperature of engaged section is 290-320 DEG C, and vacuum during extruding pelletization processing is 0.6MPa-0.8MPa.
Embodiment 2
A kind of preparation method of warm light LED lamp cover Merlon as described in Example 1, wherein some processes can also adopt
Following technique:
In described step 5)In, the mixing speed of first paragraph stirring is 60r/min, and mixing time is 1.5h, second segment stirring
Mixing speed is 300r/min, and mixing time is 30min, and the mixing speed of the 3rd section of stirring is 300r/min, and mixing time is
5h.
In described step 6)In, the extrusion temperature of independent segment is 280 DEG C, and the extrusion temperature of filling section is 350 DEG C, engaged section
Extrusion temperature be 290 DEG C.
Embodiment 3
A kind of preparation method of warm light LED lamp cover Merlon as described in Example 1, wherein some processes can also adopt
Following technique:
In described step 5)In, the mixing speed of first paragraph stirring is 80r/min, and mixing time is 1h, and what second segment stirred stirs
Mixing speed is 400r/min, and mixing time is 20min, and the mixing speed of the 3rd section of stirring is 400r/min, and mixing time is 2h.
In described step 6)In, the extrusion temperature of independent segment is 300 DEG C, and the extrusion temperature of filling section is 300 DEG C, engaged section
Extrusion temperature be 320 DEG C.
Embodiment 4
A kind of preparation method of warm light LED lamp cover Merlon as described in Example 1, wherein some processes can also adopt
Following technique:
In described step 5)In, the mixing speed of first paragraph stirring is 70r/min, and mixing time is 1.2h, second segment stirring
Mixing speed is 370r/min, and mixing time is 25min, and the mixing speed of the 3rd section of stirring is 350r/min, and mixing time is
3h.
In described step 6)In, the extrusion temperature of independent segment is 290 DEG C, and the extrusion temperature of filling section is 320 DEG C, engaged section
Extrusion temperature be 310 DEG C.
By various embodiments above, high transmission rate Merlon finally all can be obtained;It should be noted that the skill of the present invention
Art main points are to be by adding compound aluminium hydroxide agent, red phosphorus, alkali metal salt, boric acid, phosphate, light diffusion in formula
Agent, light stabilizer etc., and by 3 steps, all raw materials are respectively prepared pulverized polycarbonates, compound, No. two mixing
Material, then carries out three sections by adding pulverized polycarbonates, phosphate and boric acid after a compound and No. two compound mixing
Formula stir, mix with a compound, No. two compounds using phosphate, boric acid, and to three-stage stir mixing time with
The strict control of mixing speed, can make to play " Synergistic " between phosphate, boric acid and a compound, No. two compounds
Effect, can make the warm light LED lamp cover polycarbonate products that the present invention is obtained have preferable light transmission and fire resistance,
Test proves that, after product is painted, its light transmittance highest can also reach 85%, and fire resistance reaches V-0, and light becomes
Obtain soft not dazzling.
Those skilled in the art should be noted that in preparation method in the present invention when implementing, step 1)Adopted
The macromolecular material mixer that engineering plastics pulverizer and other procedure of processings are adopted can directly adopt existing disintegrating apparatus,
Mixing plant;Preferably employ engineering plastics pulverizer and the macromolecular material mixer of the offer of this department, through the applicant's practice
The material that proof, the engineering plastics pulverizer providing through this department and macromolecular material mixer are processed can make material have relatively
High degree of grinding and mixing evenness, can provide one preferably to ensure for warm light LED polycarbonate products are obtained.
Performance test:
Test one:Light transmission for finished product warm light LED lamp cover Merlon makes mensure.
Test sample:The product being obtained through technical scheme described in above-mentioned 4 embodiments of the present invention and on the market common
Warm light lampshade lampshade, the product that different technologies obtain samples 4 kinds respectively, and common warm light lampshade also samples 4 kinds.
Note:Sampling standard adopts gb/t2828.1-2012.
Result of the test is as shown in table 1:
Table 1
Note:In table 1, serial 1-4 is respectively the product obtained by four embodiments of the present invention, and series 5 is common warm light lampshade, weight
Multiple 1-4 is the repeated sampling of each product.
It can be seen from Table 1 that, through the warm light LED lamp cover Merlon obtained by the technical scheme described in the present invention
The light transmittance of product is up to 85%, minimum reach 81%, and the light transmittance highest of common warm light lampshade only reaches 65%.
Conclusion (of pressure testing):
It can be seen from Table 2 that, saturating through the warm light LED lamp cover Merlon obtained by the technical scheme described in the present invention
Light rate is far above the light transmittance of common warm light lampshade on the market;Wherein, with the preparation method described in embodiment 1, that is, in institute
State step 5)In, the mixing speed of first paragraph stirring is 80r/min, and mixing time is 1h, and the mixing speed of second segment stirring is
350r/min, mixing time is 30min, and the mixing speed of the 3rd section of stirring is 320r/min, and mixing time is 4h;In described step
Rapid 6)In, the extrusion temperature of independent segment is 285 DEG C, and the extrusion temperature of filling section is 330 DEG C, and the extrusion temperature of engaged section is 300
The light transmittance highest of Merlon obtained by DEG C, up to 85%, compare the light transmission of common warm light lampshade, lifting is substantially.
Test two:Fire resistance for finished product warm light LED lamp cover Merlon makes mensure.
Test sample:The product being obtained through technical scheme described in above-mentioned 4 embodiments of the present invention and on the market common
Warm light lampshade, the product that different technologies obtain samples 4 kinds respectively, and common warm light lampshade also samples 4 kinds.
Note:Sampling standard adopts gb/t2828.1-2012.
Test method:Each sample is carried out, twice after the combustion testing of 10 seconds, record flame out time, and whether have
Comburant drops.
Result of the test is as shown in table 2:
Table 2(Unit:Second)
In above test, 4 of serial 1-5 are repeated all no comburants and drop.
Note:In table 2, serial 1-4 is respectively the product obtained by four embodiments of the present invention, and series 5 is common warm light lamp
Cover, repeats the repeated sampling that 1-4 is each product.
It can be seen from Table 2 that, the warm light LED lamp cover Merlon obtained by through the present invention is in test, minimum
Time is 6 seconds, is up to 8 seconds, and the minimum time of common warm light lampshade is 15 seconds, is up to 25 seconds, may certify that through this
The flame retardant rating of the technical scheme described in four embodiments of invention all reaches V-0 level, and the fire resistance of common warm light lampshade is
V-1 level.
Conclusion (of pressure testing):
It can be seen from Table 2 that, saturating through the warm light LED lamp cover Merlon obtained by the technical scheme described in the present invention
Light rate is far above the light transmittance of common warm light lampshade on the market;Wherein, with the preparation method described in embodiment 1, that is, in institute
State step 5)In, the mixing speed of first paragraph stirring is 80r/min, and mixing time is 1h, and the mixing speed of second segment stirring is
350r/min, mixing time is 30min, and the mixing speed of the 3rd section of stirring is 320r/min, and mixing time is 4h;In described step
Rapid 6)In, the extrusion temperature of independent segment is 285 DEG C, and the extrusion temperature of filling section is 330 DEG C, and the extrusion temperature of engaged section is 300
The fire resistance highest of warm light LED lamp cover Merlon obtained by DEG C, compares the fire resistance of common warm light lampshade, and lifting is bright
Aobvious.
Claims (5)
1. a kind of warm light LED lamp cover Merlon it is characterised in that:Composition of raw materials is:
Merlon 82-88 weight portion;
Compound aluminium hydroxide agent 0.1-2 weight portion;
Red phosphorus 0.5-1 weight portion;
Alkali metal salt 2-4 weight portion;
Antioxidant 0.1-0.5 weight portion;
Boric acid 0.3-0.8 weight portion;
Phosphate 1-4 weight portion;
Light diffusing agent 0.5-1 weight portion;
Light stabilizer 0.5-1 weight portion;
Wherein, described Merlon is bisphenol A polycarbonate, and molecular weight is 26000-40000;
Wherein, the mass percent sum of above each component is 96%-100%.
2. as claimed in claim 1 a kind of warm light LED lamp cover Merlon it is characterised in that:Composition of raw materials is:
Merlon 86 weight portion
Compound aluminium hydroxide agent 1.2 weight portion
Red phosphorus 0.8 weight portion
Alkali metal salt 3 weight portion
Antioxidant 0.2 weight portion
Boric acid 0.7 weight portion
Phosphate 2.8 weight portion
Light diffusing agent 0.5-1 weight portion
Light stabilizer 0.5-1 weight portion.
3. as claimed in claim 1 a kind of preparation method of warm light LED lamp cover Merlon it is characterised in that:Including with
Lower step:
1)It is standby after Merlon addition engineering plastics pulverizer is pulverized;
2)Compound aluminium hydroxide agent, red phosphorus and alkali metal salt are uniformly added into macromolecular material stirring using automatic loading and unloading device
Machine is stirred, and mixing speed is 400r/min, and mixing time is 10min, obtains a compound;
3)Antioxidant, light diffusing agent and light stabilizer are uniformly added into macromolecular material mixer using automatic loading and unloading device enter
Row stirring, mixing speed is 420r/min, and mixing time is 20min, obtains No. two compounds;
4)By step 2)With step 3)The compound obtaining, No. two compounds add macromolecular material mixer to be stirred
Mix, mixing speed is 200r/min, mixing time is 50min;
5) in step 4)After the completion of stirring, it is uniformly added into pulverized polycarbonates, boric acid and phosphate using automatic loading and unloading device
Carry out three-stage stirring, the mixing speed of first paragraph stirring is 60-80r/min, and mixing time is 1-1.5h, second segment stirring
Mixing speed is 300-400r/min, and mixing time is 20-30min, and the mixing speed of the 3rd section of stirring is 300-400r/min,
Mixing time is 2-5h;
6)By step 5)The material mixing obtaining is put into engineering plastics extruder and is carried out extruding pelletization, obtains warm light LED
Lampshade polycarbonate products;Wherein, the extrusion temperature of independent segment is 280-300 DEG C, and the extrusion temperature of filling section is 300-350
DEG C, the extrusion temperature of engaged section is 290-320 DEG C, and vacuum during extruding pelletization processing is 0.6MPa-0.8MPa.
4. as claimed in claim 3 a kind of preparation method of warm light LED lamp cover Merlon it is characterised in that:In step
5)In, the mixing speed of described first paragraph stirring is 80r/min, and mixing time is 1h, and the mixing speed of second segment stirring is
350r/min, mixing time is 30min, and the mixing speed of the 3rd section of stirring is 320r/min, and mixing time is 4h.
5. as claimed in claim 3 a kind of preparation method of warm light LED lamp cover Merlon it is characterised in that:In step
6)In, the extrusion temperature of described independent segment is 285 DEG C, and the extrusion temperature of filling section is 330 DEG C, and the extrusion temperature of engaged section is
300℃.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106957517A (en) * | 2017-04-14 | 2017-07-18 | 安徽世林照明股份有限公司 | A kind of material and preparation method for being used to make LED lamp cover |
CN107011644A (en) * | 2017-04-09 | 2017-08-04 | 福建华塑新材料有限公司 | A kind of polysiloxane polycarbonate copolymeric material and preparation method thereof |
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CN107286619A (en) * | 2017-06-21 | 2017-10-24 | 颍上昌盛电器有限公司 | A kind of environment-protecting LED lampshade formula and preparation method thereof |
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