CN108841079A - A kind of light diffusing sheet and preparation method thereof - Google Patents
A kind of light diffusing sheet and preparation method thereof Download PDFInfo
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- CN108841079A CN108841079A CN201810597293.4A CN201810597293A CN108841079A CN 108841079 A CN108841079 A CN 108841079A CN 201810597293 A CN201810597293 A CN 201810597293A CN 108841079 A CN108841079 A CN 108841079A
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- light diffusing
- temperature
- diffusing sheet
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- warm area
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
-
- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
-
- 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
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
-
- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- 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
- C08L2205/24—Crystallisation aids
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of light diffusing sheets, consist of the following compositions in parts by mass：100 parts of optics grade polypropylene, 0.4 ~ 0.96 part of light diffusing agent, 0.05 ~ 0.5 part of titanium dioxide, 0.008 ~ 0.02 part of White Mineral Oil, 3 ~ 9 parts of toughener, 0.1 ~ 0.4 part of nucleating agent, 0.00005 ~ 0.001 part of fluorescent whitening agent；By invention by using screw rod rotary loading sealing stir into mode improve, formula in diffuser plate is without secondary granulation, pass through mold extrusion molding after being mixed directly, it reduces the unstable phenomenon of the optical property caused in traditional production process by secondary granulation masterbatch incomplete mixing to occur, and product obtained has the low optical property through the high luminance of haze.
Description
Technical field
The invention belongs to the production technical fields of light diffusing sheet, and in particular to a kind of light diffusing sheet and preparation method thereof.
Background technique
Light diffusing sheet is by means chemically or physically, and being expert at using light, to encounter two refractive index on the way different for diameter
When medium, refraction occurs, the physics of reflection and scattering is imagined, and added in the substrates such as PMMA, PC, PS, PP inorganic or organic
Light diffusing agent；Or by the artificial adjustment light of array arrangement of the micro-feature structure of substrate surface, make light that not Tongfang occur
To refraction, reflection, with scattering realize that incident light sufficiently dissipates color and generates optics diffusion with this to change the travelling route of light
Effect.
Traditional light diffusing sheet production technology be by transparent polymeric matrix material and light diffusing agent particle and other
Function additive be blended, be granulated by parallel dual-screw, be added to single-screw bar extruder according still further to certain ratio, pass through die head
With three-roll formation plate；As patent CN104004268A discloses the PP diffuser plate of a kind of display backlight source and LED flat lamp
Production method includes the following steps：A) suitable light diffusing agent is added to polymeric matrix material, be uniformly mixed, in the same direction double spiral shells
Bar is granulated into optics master batch；B) the optics master batch for producing appropriate step a is added in polymeric matrix material, by squeezing out
Diffuser plate needed for molding production.The invented technology is simple, easy to implement, and production cost is low, and the diffuser plate tool produced
There are fabulous transmitance and mist degree；But the optics master batch that production is granulated in the invention is usually irregular, and mill is easy when processing
Process equipment is damaged, mixing unevenly can make the mechanical property of polymeric matrix be declined the uneven surface for leading to material, this
It is to reach light diffusion effect by the scattering at light diffusion particle and matrix resin interface in technology, light is difficult in scattering process
Exempt from the loss for having energy, therefore often influences whether whole light transmittance when guaranteeing light diffusion effect.Meanwhile traditional light expands
The production process to fall apart, each ingredient is not quite similar in granulation process, to make the ingredient for being most difficult to melt melt granulation completely,
Need to the temperature was then adjusted to the temperature identical or slightly higher with the melting temperature for being most difficult to molten component to realize granulation process, therefore squeezing out
Temperature control is duplicate during machine is granulated, and easily forms the state of overheat, and that superheating phenomenon can generate is a large amount of black
Point or unqualified phenomenon, and then influence product quality.
Summary of the invention
In order to solve the above technical problems, the present invention provides kind of light diffusing sheet and preparation method thereof, by being carried out to mold
It improves, the raw material in diffuser plate, by mold extrusion molding after being mixed directly, is reduced traditional without secondary granulation
The low phenomenon of uneven surface, the translucency caused in production process by incomplete mixing occurs, and product obtained is with low
Through the optical property of the high luminance of haze.
The technical solution adopted by the present invention is：
A kind of light diffusing sheet, consists of the following compositions in parts by mass：100 parts of optics grade polypropylene, light diffusing agent 0.4 ~
0.96 part, 0.05 ~ 0.5 part of titanium dioxide, 0.008 ~ 0.02 part of White Mineral Oil, 3 ~ 9 parts of toughener, 0.1 ~ 0.4 part of nucleating agent, fluorescence increasing
White dose 0.00005 ~ 0.001 part.
Preferably, the polyacrylic refractive index of optical grade is 1.54；The refractive index of light diffusing agent be 1.42, partial size be 1~
3um。
Preferably, light diffusing agent is inorganic particulate or organic polymer particle, preferably glass microballoon, SiO2, TiO2, poly-
One or more of methyl methacrylate, polystyrene, silicone resin, acrylic resin.
Preferably, toughener is that maleic anhydride meets one or more of POE, EVA, SBS, EPDM, PE, ABS；Fluorescence increases
White dose of preferred OB-1；
Preferably, nucleating agent is in talcum powder, mica powder, titanium dioxide, boron nitride, sodium carbonate, potassium carbonate or rare earth oxide
One or more.
The invention also discloses a kind of methods for preparing above-mentioned light diffusing sheet, include the following steps：
A. weighing optics grade polypropylene, light diffusing agent, titanium dioxide, White Mineral Oil, toughener, nucleating agent and fluorescent brightening in proportion
Agent, 15 ~ 30min of high-speed stirred are uniformly mixed it；
B., raw material in step A after mixing is dried to 2 ~ 3h at 70 ~ 80 DEG C, evaporates moisture；
C. raw material of the step B after dry is put into heating pipe, carries out heating treatment, melts and be uniformly mixed；
D. the mixture after step C melting is delivered in mold, squeezes and is molded through three rollers, cooling and shaping are got product.
Preferably, the drying in step B is that static drying or dynamic are dried, and dynamic drying increases during drying
Whipping process.
Preferably, in step C, heating treatment is the position according to raw material in heating pipe and sets different temperature
Value, the temperature of the first warm area are 170 DEG C, and the temperature of the second warm area is 180 DEG C, and the temperature of third warm area is 200 DEG C, four-temperature region
Temperature be 200 DEG C, the temperature of the 5th warm area is 225 DEG C, and the temperature of the 6th warm area is 225 DEG C, and the temperature of the 7th warm area is 210
℃。
Preferably, the mold is the mold with arranged in regular hexagon shape microlens array.
Compared with prior art, the present invention has following technical advantage：
（1）Shape on the lenticule on diffuser surface, red worm or the shape transfer of frosted in the present invention mold, distribution
It is relatively uniform, by the arrangement of micro- feature, red worm or frosted structure on its surface, the folding of different directions occurs when passing through light
It penetrates, changes the travelling route of light, realize that incident light sufficiently dissipates color；Simultaneously as in the present invention light scattering agent used refractive index
It is 1.42, the polyacrylic refractive index of optical grade is 1.54, and refringence >=0.02 of two kinds of materials can be such that light source spreads by light
Light transmittance greatly increases when plate, and reduces the additive amount that can lead to the light diffusing agent of optical energy dissipation.
（2）Heating treatment in the present invention is the position according to raw material in heating pipe and sets different temperature values,
Stringent control is carried out to temperature, can minimize a large amount of stains generated by superheating phenomenon during traditional processing technology or
The underproof phenomenon of person, promotes the qualification rate of product.
（3）The present invention is by improving mold, and for the raw material in diffuser plate without secondary granulation, directly mixing is equal
By mold extrusion molding after even, uneven surface, the translucency caused in traditional production process by incomplete mixing is reduced
Low phenomenon occurs, and product obtained has the optical property of haze high light transmittance.
Specific embodiment
Embodiment 1
A kind of light diffusing sheet, consists of the following compositions in parts by mass：100 parts of optics grade polypropylene, SiO2 0.4 part, titanium
0.05 part of white powder, 0.008 part of White Mineral Oil, maleic anhydride meet 3 parts of POE, 0.1 part of talcum powder, 0.00005 part of OB-1, wherein light
The polyacrylic refractive index of classes and grades in school is 1.54；SiO2Refractive index be 1.42, partial size 1.5um.
The invention also discloses a kind of methods for preparing light diffusing sheet, include the following steps：
A. in proportion weigh optical grade optics grade polypropylene, SiO2, titanium dioxide, White Mineral Oil, maleic anhydride connect POE, talcum powder with
And OB-1, high-speed stirred 15min, it is uniformly mixed it；
B. the raw material in step A after mixing is static at 70 DEG C to dry 2h, evaporate moisture；
C. raw material of the step B after dry is put into heating pipe, carries out heating treatment, melts and be uniformly mixed, wherein the first temperature
The temperature in area is 170 DEG C, and the temperature of the second warm area is 180 DEG C, and the temperature of third warm area is 200 DEG C, and the temperature of four-temperature region is
200 DEG C, the temperature of the 5th warm area is 225 DEG C, and the temperature of the 6th warm area is 225 DEG C, and the temperature of the 7th warm area is 210 DEG C；
D. the mixture after step C melting is delivered in the mold with arranged in regular hexagon shape microlens array, is squeezed through three rollers
Pressure injection, cooling and shaping are got product.
Embodiment 2
A kind of light diffusing sheet, consists of the following compositions in parts by mass：100 parts of optics grade polypropylene, TiO20.5 part, titanium
0.3 part of white powder, 0.01 part of White Mineral Oil, 6 parts of SBS, 0.2 part of mica powder, 0.0001 part of OB-1, wherein optical grade is polyacrylic
Refractive index is 1.54；TiO2Refractive index be 1.42, partial size 2um.
The invention also discloses a kind of methods for preparing light diffusing sheet, include the following steps：
A. in proportion weigh optics grade polypropylene, TiO2, titanium dioxide, White Mineral Oil, SBS, mica powder and OB-1, high-speed stirred
20min is uniformly mixed it；
B. the raw material in step A after mixing is static at 75 DEG C to dry 2.5h, evaporate moisture；
C. raw material of the step B after dry is put into heating pipe, carries out heating treatment, melts and be uniformly mixed, wherein the first temperature
The temperature in area is 170 DEG C, and the temperature of the second warm area is 180 DEG C, and the temperature of third warm area is 200 DEG C, and the temperature of four-temperature region is
200 DEG C, the temperature of the 5th warm area is 225 DEG C, and the temperature of the 6th warm area is 225 DEG C, and the temperature of the 7th warm area is 210 DEG C；
D. the mixture after step C melting is delivered in mold, squeezes and is molded through three rollers, cooling and shaping are got product.
Embodiment 3
A kind of light diffusing sheet, consists of the following compositions in parts by mass：100 parts of optics grade polypropylene, 0.96 part of polystyrene,
0.5 part of titanium dioxide, 0.02 part of White Mineral Oil, 9 parts of ABS, 0.4 part of boron nitride, 0.001 part of OB-1；Wherein, optical grade is polyacrylic
Refractive index is 1.54；The refractive index of polystyrene is 1.42, partial size 3um.
The invention also discloses a kind of methods for preparing light diffusing sheet, include the following steps：
A. weigh optics grade polypropylene, polystyrene, titanium dioxide, White Mineral Oil, ABS, boron nitride and OB-1 in proportion, high-speed stirring
30min is mixed, it is uniformly mixed；
B. the raw material in step A after mixing is dynamically dried into 3h at 80 DEG C, evaporates moisture；
C. raw material of the step B after dry is put into heating pipe, carries out heating treatment, melts and be uniformly mixed, wherein the first temperature
The temperature in area is 170 DEG C, and the temperature of the second warm area is 180 DEG C, and the temperature of third warm area is 200 DEG C, and the temperature of four-temperature region is
200 DEG C, the temperature of the 5th warm area is 225 DEG C, and the temperature of the 6th warm area is 225 DEG C, and the temperature of the 7th warm area is 210 DEG C；
D. the mixture after step C melting is delivered in the mold with arranged in regular hexagon shape microlens array, is squeezed through three rollers
Pressure injection, cooling and shaping are got product.
Claims (9)
1. a kind of light diffusing sheet, it is characterised in that：It consists of the following compositions in parts by mass：100 parts of optics grade polypropylene, light
0.4 ~ 0.96 part of diffusant, 0.05 ~ 0.5 part of titanium dioxide, 0.008 ~ 0.02 part of White Mineral Oil, 3 ~ 9 parts of toughener, nucleating agent 0.1 ~
0.4 part, 0.00005 ~ 0.001 part of fluorescent whitening agent.
2. a kind of light diffusing sheet according to claim 1, it is characterised in that：The polyacrylic refractive index of optical grade is 1.54；
The refractive index of light diffusing agent is 1.42, and partial size is 1~3um.
3. a kind of light diffusing sheet according to claim 1, it is characterised in that：Light diffusing agent is inorganic particulate or organic polymer
Object particle, preferably glass microballoon, SiO2, TiO2, polymethyl methacrylate, polystyrene, silicone resin, acrylic resin
One or more of.
4. a kind of light diffusing sheet according to claim 1, it is characterised in that：Toughener be maleic anhydride connect POE, EVA,
One or more of SBS, EPDM, PE, ABS；The preferred OB-1 of fluorescent whitening agent.
5. a kind of light diffusing sheet according to claim 1, it is characterised in that：Nucleating agent is talcum powder, mica powder, titanium dioxide
One or more of titanium, boron nitride, sodium carbonate, potassium carbonate or rare earth oxide.
6. a kind of method for preparing light diffusing sheet described in claim 1, it is characterised in that include the following steps：
A. weighing optics grade polypropylene, light diffusing agent, titanium dioxide, White Mineral Oil, toughener, nucleating agent and fluorescent brightening in proportion
Agent, 15 ~ 30min of high-speed stirred are uniformly mixed it；
B., raw material in step A after mixing is dried to 2 ~ 3h at 70 ~ 80 DEG C, evaporates moisture；
C. raw material of the step B after dry is put into heating pipe, carries out heating treatment, melts and be uniformly mixed；
D. the mixture after step C melting is delivered in mold, squeezes and is molded through three rollers, cooling and shaping are got product.
7. a kind of preparation method of light diffusing sheet according to claim 6, it is characterised in that：Drying in step B is quiet
State drying or dynamic are dried, and dynamic drying increases whipping process during drying.
8. a kind of preparation method of light diffusing sheet according to claim 6, it is characterised in that：In step C, heating treatment is
Different temperature values is set according to position of the raw material in heating pipe, the temperature of the first warm area is 170 DEG C, the second warm area
Temperature is 180 DEG C, and the temperature of third warm area is 200 DEG C, and the temperature of four-temperature region is 200 DEG C, and the temperature of the 5th warm area is 225
DEG C, the temperature of the 6th warm area is 225 DEG C, and the temperature of the 7th warm area is 210 DEG C.
9. a kind of preparation method of light diffusing sheet according to claim 6, it is characterised in that：The mold is with positive six
The mold of side shape arrangement microlens array.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810597293.4A CN108841079A (en) | 2018-06-12 | 2018-06-12 | A kind of light diffusing sheet and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810597293.4A CN108841079A (en) | 2018-06-12 | 2018-06-12 | A kind of light diffusing sheet and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109553858A (en) * | 2018-12-06 | 2019-04-02 | 重庆颖锋兴瑞光电科技有限公司 | A kind of PP diffuser plate |
| CN111361073A (en) * | 2020-03-19 | 2020-07-03 | 苏州坚特而光电科技有限公司 | Method for processing diffusion plate |
| CN112225987A (en) * | 2020-09-27 | 2021-01-15 | 惠州市峄董塑胶科技有限公司 | Formula and process of plate for folder |
| CN113406739A (en) * | 2021-07-15 | 2021-09-17 | 江西古川胶带有限公司 | Optical diffusion film and preparation method and application thereof |
| CN113885112A (en) * | 2021-11-09 | 2022-01-04 | 江西盛汇光学科技协同创新有限公司 | High-transmittance and high-haze light diffusion plate and manufacturing method thereof |
| CN113985507A (en) * | 2021-11-19 | 2022-01-28 | 江苏恒隆通新材料科技有限公司 | Production method of IPPS diffusion plate |
| CN115895108A (en) * | 2022-11-01 | 2023-04-04 | 上海睿聚环保科技有限公司 | Waste PP recycled plastic for high-transparency injection molding product |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109553858A (en) * | 2018-12-06 | 2019-04-02 | 重庆颖锋兴瑞光电科技有限公司 | A kind of PP diffuser plate |
| CN111361073A (en) * | 2020-03-19 | 2020-07-03 | 苏州坚特而光电科技有限公司 | Method for processing diffusion plate |
| CN112225987A (en) * | 2020-09-27 | 2021-01-15 | 惠州市峄董塑胶科技有限公司 | Formula and process of plate for folder |
| CN113406739A (en) * | 2021-07-15 | 2021-09-17 | 江西古川胶带有限公司 | Optical diffusion film and preparation method and application thereof |
| CN113885112A (en) * | 2021-11-09 | 2022-01-04 | 江西盛汇光学科技协同创新有限公司 | High-transmittance and high-haze light diffusion plate and manufacturing method thereof |
| CN113985507A (en) * | 2021-11-19 | 2022-01-28 | 江苏恒隆通新材料科技有限公司 | Production method of IPPS diffusion plate |
| CN115895108A (en) * | 2022-11-01 | 2023-04-04 | 上海睿聚环保科技有限公司 | Waste PP recycled plastic for high-transparency injection molding product |
| CN115895108B (en) * | 2022-11-01 | 2024-04-19 | 上海睿聚环保科技有限公司 | Waste PP regenerated plastic for high-transparency injection molding product |
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Application publication date: 20181120 |