CN107286619A - A kind of environment-protecting LED lampshade formula and preparation method thereof - Google Patents
A kind of environment-protecting LED lampshade formula and preparation method thereof Download PDFInfo
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- CN107286619A CN107286619A CN201710473116.0A CN201710473116A CN107286619A CN 107286619 A CN107286619 A CN 107286619A CN 201710473116 A CN201710473116 A CN 201710473116A CN 107286619 A CN107286619 A CN 107286619A
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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
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
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Abstract
The invention discloses a kind of environment-protecting LED lampshade formula and preparation method thereof, it is made up of according to parts by weight following raw material：120 parts of polycarbonate resin PC100 parts, 50 parts of polymethyl methacrylate 30 part, 12 parts of YAG fluorescent powder 8 part, 8 parts of phosphate flame retardant 4 part, compound 6 parts 12 parts of aluminium hydroxide agent, 4 parts of alkali metal salt 2 part, 8 parts of inorganic nanoparticles 5 part, 3 parts 6 parts of methoxyl group polyglycols acetic acid, 1.2 parts of antioxidant 0.8 part, 0.6 part of compatilizer 0.3 part, 0.4 part of colouring agent 0.1 part, 1.6 parts of light diffusing agent 1.2 part, 1.4 parts of light stabilizer 1 part, the present invention has preferable dimensional stability, lampshade material environment friendly and recoverable, there is higher light transmission rate, chemical durability of glass is high, High anti bending strength, simple production process, production cost is relatively low.
Description
Technical field
The invention mainly relates to a kind of environment-protecting LED lampshade formula and preparation method thereof.
Background technology
The light source of LED is relatively concentrated, and just by lampshade light need to be made uniformly to be diffused.The PET light studied now expands
Scattered material can exactly make light that the optical phenomenas such as refraction, reflection, scattering occur during wearing, can be by spot light or line source
Line source or area source are changed into, the effect of even light is played.Major part diffusion barrier is to use transparent PET as base material at present,
One layer of light diffusion layer containing light granule proliferation is coated on its surface.This diffusion barrier is in process because using a large amount of organic
Solvent, easily causes the pollution of environment.And light diffusion layer and difference of the matrix because of material itself, it is poor that modulus of elasticity is present
Not, light diffusion layer is easily caused to come off or damage once bending.This just improves difficulty to the use of optical diffusion film, reduction
The yield rate of product.If by light diffusing agent direct combination into matrix, can not only avoid pollution, and work can be simplified
Skill reduces cost.
The content of the invention
It is an object of the invention to provide a kind of environment-protecting LED lampshade formula and preparation method thereof, above-mentioned technological deficiency is solved.
To achieve the above object, the present invention provides following technical scheme：
A kind of environment-protecting LED lampshade formula, is made up of according to parts by weight following raw material：：- 120 parts of polycarbonate resin PC100 parts,
30 parts -50 parts of polymethyl methacrylate, 8 parts -12 parts of YAG fluorescent material, 4 parts -8 parts of phosphate flame retardant, compound aluminium hydroxide
6 parts -12 parts of agent, 2 parts -4 parts of alkali metal salt, 5 parts -8 parts of inorganic nanoparticles, 3 parts -6 parts of methoxyl group polyglycols acetic acid, antioxidant
0.8 part -1.2 parts, 0.3 part -0.6 part of compatilizer, 0.1 part -0.4 part of colouring agent, 1.2 parts -1.6 parts of light diffusing agent, light stabilizer 1
- 1.4 parts of part.
A kind of above-mentioned environment-protecting LED lampshade formula, is made up of according to parts by weight following raw material：：Polycarbonate resin PC100
Parts -118 parts, it is 30 parts -48 parts of polymethyl methacrylate, 8 parts -10 parts of YAG fluorescent material, 4 parts -6 parts of phosphate flame retardant, multiple
Close 6 parts -10 parts of aluminium hydroxide agent, 2 parts -3 parts of alkali metal salt, 5 parts -7 parts of inorganic nanoparticles, 3 parts of methoxyl group polyglycols acetic acid -
5 parts, 0.8 part -1.0 parts of antioxidant, 0.3 part -0.5 part of compatilizer, 0.1 part -0.3 part of colouring agent, 1.2 part -1.4 of light diffusing agent
Part, 1 part -1.2 parts of light stabilizer.
A kind of above-mentioned environment-protecting LED lampshade formula, is made up of according to parts by weight following raw material：：Polycarbonate resin PC110
Part, 40 parts of polymethyl methacrylate, 10 parts of YAG fluorescent material, 6 parts of phosphate flame retardant, compound 9 parts of aluminium hydroxide agent, alkali gold
Belong to 3 parts of salt, 6 parts of inorganic nanoparticles, 4 parts of methoxyl group polyglycols acetic acid, 1 part of antioxidant, 0.5 part of compatilizer, colouring agent 0.3
Part, 1.4 parts of light diffusing agent, 1.2 parts of light stabilizer.
A kind of preparation method of environment-protecting LED lampshade, is comprised the steps of：
（1）Polycarbonate resin PC and polymethyl methacrylate is taken to be put into macromolecule according to the parts by weight described in claim 1
Mixture A is obtained after being pulverized and mixed in materials pulverizer；
（2）YAG fluorescent material is added to 5-8 minutes in the mixture A that step 1 is obtained by weight and obtains mixture B；
（3）By weight by other raw materials be added sequentially to be put into mixture B in homogenizer stirring be mixed to get it is mixed
Compound C, mixing speed is 500r/min, and mixing time is 40 minutes.
（4）In the mixture C feeding twin-screw that step 3 is obtained or reciprocating single screw extrusion equipment, while heated to
260-295 DEG C of melting.
（5）The fused mass of step 4 is cooled into proper temperature to heat, extrude, be molded, cool down, repair through injection machine
A kind of environment-protecting LED lampshade.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention has preferable dimensional stability, lampshade material environment friendly and recoverable, there is higher light transmission rate, glass
Chemical stability is high, and High anti bending strength, simple production process, production cost is relatively low.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment.
Embodiment 1
A kind of environment-protecting LED lampshade formula, is made up of according to parts by weight following raw material：：Polycarbonate resin PC, 120 parts, poly- first
50 parts of base methyl acrylate, 12 parts of YAG fluorescent material, 8 parts of phosphate flame retardant, compound 12 parts of aluminium hydroxide agent, alkali metal salt 4
Part, 8 parts of inorganic nanoparticles, 6 parts of methoxyl group polyglycols acetic acid, 1.2 parts of antioxidant, 0.6 part of compatilizer, 0.4 part of colouring agent, light
1.6 parts of diffusant, 1.4 parts of light stabilizer.
A kind of preparation method of above-mentioned environment-protecting LED lampshade, is comprised the steps of：
（1）Polycarbonate resin PC and polymethyl methacrylate is taken to be put into macromolecule according to the parts by weight described in claim 1
Mixture A is obtained after being pulverized and mixed in materials pulverizer；
（2）YAG fluorescent material is added to 5-8 minutes in the mixture A that step 1 is obtained by weight and obtains mixture B；
（3）By weight by other raw materials be added sequentially to be put into mixture B in homogenizer stirring be mixed to get it is mixed
Compound C, mixing speed is 500r/min, and mixing time is 40 minutes.
（4）In the mixture C feeding twin-screw that step 3 is obtained or reciprocating single screw extrusion equipment, while heated to
260-295 DEG C of melting.
（5）The fused mass of step 4 is cooled into proper temperature to heat, extrude, be molded, cool down, repair through injection machine
A kind of environment-protecting LED lampshade.
Embodiment 2
A kind of environment-protecting LED lampshade formula, is made up of according to parts by weight following raw material：：- 120 parts of polycarbonate resin PC100 parts,
30 parts of polymethyl methacrylate, 8 parts of YAG fluorescent material, 4 parts of phosphate flame retardant, compound 6 parts of aluminium hydroxide agent, alkali metal salt
2 parts, 5 parts of inorganic nanoparticles, 3 parts of methoxyl group polyglycols acetic acid, 0.8 part of antioxidant, 0.3 part of compatilizer, 0.1 part of colouring agent,
1.2 parts of light diffusing agent, 1 part of light stabilizer.
A kind of preparation method of above-mentioned environment-protecting LED lampshade, is comprised the steps of：
（1）Polycarbonate resin PC and polymethyl methacrylate is taken to be put into macromolecule according to the parts by weight described in claim 1
Mixture A is obtained after being pulverized and mixed in materials pulverizer；
（2）YAG fluorescent material is added to 5-8 minutes in the mixture A that step 1 is obtained by weight and obtains mixture B；
（3）By weight by other raw materials be added sequentially to be put into mixture B in homogenizer stirring be mixed to get it is mixed
Compound C, mixing speed is 500r/min, and mixing time is 40 minutes.
（4）In the mixture C feeding twin-screw that step 3 is obtained or reciprocating single screw extrusion equipment, while heated to
260-295 DEG C of melting.
（5）The fused mass of step 4 is cooled into proper temperature to heat, extrude, be molded, cool down, repair through injection machine
A kind of environment-protecting LED lampshade.
Embodiment 3
A kind of environment-protecting LED lampshade formula, is made up of according to parts by weight following raw material：：PC110 parts of polycarbonate resin, poly- methyl
40 parts of methyl acrylate, 10 parts of YAG fluorescent material, 6 parts of phosphate flame retardant, compound 9 parts of aluminium hydroxide agent, 3 parts of alkali metal salt,
6 parts of inorganic nanoparticles, 4 parts of methoxyl group polyglycols acetic acid, 1 part of antioxidant, 0.5 part of compatilizer, 0.3 part of colouring agent, light diffusion
1.4 parts of agent, 1.2 parts of light stabilizer.
A kind of preparation method of above-mentioned environment-protecting LED lampshade, is comprised the steps of：
（1）Polycarbonate resin PC and polymethyl methacrylate is taken to be put into macromolecule according to the parts by weight described in claim 1
Mixture A is obtained after being pulverized and mixed in materials pulverizer；
（2）YAG fluorescent material is added to 5-8 minutes in the mixture A that step 1 is obtained by weight and obtains mixture B；
（3）By weight by other raw materials be added sequentially to be put into mixture B in homogenizer stirring be mixed to get it is mixed
Compound C, mixing speed is 500r/min, and mixing time is 40 minutes.
（4）In the mixture C feeding twin-screw that step 3 is obtained or reciprocating single screw extrusion equipment, while heated to
260-295 DEG C of melting.
（5）The fused mass of step 4 is cooled into proper temperature to heat, extrude, be molded, cool down, repair through injection machine
A kind of environment-protecting LED lampshade.
The present invention has preferable dimensional stability, lampshade material environment friendly and recoverable, there is higher light transmission rate,
Chemical durability of glass is high, and High anti bending strength, simple production process, production cost is relatively low.
The better embodiment to this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party
, can also be on the premise of this patent objective not be departed from formula, the knowledge that one skilled in the relevant art possesses
Make a variety of changes.
Claims (4)
1. a kind of environment-protecting LED lampshade formula, it is characterised in that be made up of according to parts by weight following raw material：：Polycarbonate resin
- 120 parts of PC100 parts, 30 parts -50 parts of polymethyl methacrylate, 8 parts -12 parts of YAG fluorescent material, 4 part -8 of phosphate flame retardant
Part, compound 6 parts -12 parts of aluminium hydroxide agent, 2 parts -4 parts of alkali metal salt, 5 parts -8 parts of inorganic nanoparticles, methoxyl group polyglycols second
3 parts -6 parts of acid, 0.8 part -1.2 parts of antioxidant, 0.3 part -0.6 part of compatilizer, 0.1 part -0.4 part of colouring agent, light diffusing agent 1.2
Part -1.6 parts, 1 part -1.4 parts of light stabilizer.
2. a kind of environment-protecting LED lampshade formula according to claim 1, it is characterised in that according to parts by weight by following raw material group
Into：：- 118 parts of polycarbonate resin PC100 parts, 30 parts -48 parts of polymethyl methacrylate, 8 parts -10 parts of YAG fluorescent material,
4 parts -6 parts of phosphate flame retardant, compound 6 parts -10 parts of aluminium hydroxide agent, 2 parts -3 parts of alkali metal salt, 5 part -7 of inorganic nanoparticles
Part, 3 parts -5 parts of methoxyl group polyglycols acetic acid, 0.8 part -1.0 parts of antioxidant, 0.3 part -0.5 part of compatilizer, 0.1 part of colouring agent -
0.3 part, 1.2 parts -1.4 parts of light diffusing agent, 1 part -1.2 parts of light stabilizer.
3. a kind of environment-protecting LED lampshade formula according to claim 1, it is characterised in that according to parts by weight by following raw material group
Into：：PC110 parts of polycarbonate resin, 40 parts of polymethyl methacrylate, 10 parts of YAG fluorescent material, 6 parts of phosphate flame retardant,
Compound 9 parts of aluminium hydroxide agent, 3 parts of alkali metal salt, 6 parts of inorganic nanoparticles, 4 parts of methoxyl group polyglycols acetic acid, 1 part of antioxidant,
0.5 part of compatilizer, 0.3 part of colouring agent, 1.4 parts of light diffusing agent, 1.2 parts of light stabilizer.
4. a kind of environment-protecting LED lampshade formula according to claim 1, it is characterised in that comprise the steps of：
（1）Polycarbonate resin PC and polymethyl methacrylate is taken to be put into macromolecule according to the parts by weight described in claim 1
Mixture A is obtained after being pulverized and mixed in materials pulverizer；
（2）YAG fluorescent material is added to 5-8 minutes in the mixture A that step 1 is obtained by weight and obtains mixture B；
（3）By weight by other raw materials be added sequentially to be put into mixture B in homogenizer stirring be mixed to get it is mixed
Compound C, mixing speed is 500r/min, and mixing time is 40 minutes；
（4）In the mixture C feeding twin-screw that step 3 is obtained or reciprocating single screw extrusion equipment, while heated to 260-
295 DEG C of meltings；
（5）By the fused mass of step 4 be cooled to proper temperature heated through injection machine, extrude, be molded, cool down, repair it is a kind of
Environment-protecting LED lampshade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710473116.0A CN107286619A (en) | 2017-06-21 | 2017-06-21 | A kind of environment-protecting LED lampshade formula and preparation method thereof |
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| CN201710473116.0A CN107286619A (en) | 2017-06-21 | 2017-06-21 | A kind of environment-protecting LED lampshade formula and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108192314A (en) * | 2018-02-07 | 2018-06-22 | 佛山市富利来灯饰有限公司 | The preparation method of high temperature resistant, high-intensity lamp cover material |
| CN108219430A (en) * | 2018-02-07 | 2018-06-29 | 佛山市富利来灯饰有限公司 | A kind of high temperature resistant, high-intensity lamp cover material composition |
| CN109306167A (en) * | 2018-08-26 | 2019-02-05 | 深圳市名家汇科技股份有限公司 | A kind of flat lamp lampshade material and preparation method thereof |
| CN111909690A (en) * | 2020-08-12 | 2020-11-10 | 中山市亿科照明有限公司 | Fluorescent composition for full-spectrum LED and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102911490A (en) * | 2012-09-20 | 2013-02-06 | 建湖坤杰照明科技有限公司 | Polycarbonate resin fluorescent composite material and fluorescent LED lampshade production method |
| CN104356626A (en) * | 2014-10-31 | 2015-02-18 | 惠州市沃特新材料有限公司 | Polycarbonate material composition of reinforced LED lamp shade and preparation method and LED lamp shade |
| CN105017743A (en) * | 2014-04-30 | 2015-11-04 | 建湖坤杰光电有限公司 | Nano phosphor powder composite material LED lampshade and forming technology thereof |
| CN106398162A (en) * | 2016-09-30 | 2017-02-15 | 福建华塑新材料有限公司 | Polycarbonate for warm-light LED lampshade and preparation method thereof |
-
2017
- 2017-06-21 CN CN201710473116.0A patent/CN107286619A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102911490A (en) * | 2012-09-20 | 2013-02-06 | 建湖坤杰照明科技有限公司 | Polycarbonate resin fluorescent composite material and fluorescent LED lampshade production method |
| CN105017743A (en) * | 2014-04-30 | 2015-11-04 | 建湖坤杰光电有限公司 | Nano phosphor powder composite material LED lampshade and forming technology thereof |
| CN104356626A (en) * | 2014-10-31 | 2015-02-18 | 惠州市沃特新材料有限公司 | Polycarbonate material composition of reinforced LED lamp shade and preparation method and LED lamp shade |
| CN106398162A (en) * | 2016-09-30 | 2017-02-15 | 福建华塑新材料有限公司 | Polycarbonate for warm-light LED lampshade and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108192314A (en) * | 2018-02-07 | 2018-06-22 | 佛山市富利来灯饰有限公司 | The preparation method of high temperature resistant, high-intensity lamp cover material |
| CN108219430A (en) * | 2018-02-07 | 2018-06-29 | 佛山市富利来灯饰有限公司 | A kind of high temperature resistant, high-intensity lamp cover material composition |
| CN109306167A (en) * | 2018-08-26 | 2019-02-05 | 深圳市名家汇科技股份有限公司 | A kind of flat lamp lampshade material and preparation method thereof |
| CN111909690A (en) * | 2020-08-12 | 2020-11-10 | 中山市亿科照明有限公司 | Fluorescent composition for full-spectrum LED and application thereof |
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