CN107553858A - A kind of preparation method for the feature PMMA sheet materials that light guide plate is prepared suitable for the high-rate laser method of layouting - Google Patents
A kind of preparation method for the feature PMMA sheet materials that light guide plate is prepared suitable for the high-rate laser method of layouting Download PDFInfo
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- CN107553858A CN107553858A CN201710771809.8A CN201710771809A CN107553858A CN 107553858 A CN107553858 A CN 107553858A CN 201710771809 A CN201710771809 A CN 201710771809A CN 107553858 A CN107553858 A CN 107553858A
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Abstract
The invention discloses a kind of technology of preparing for the feature PMMA sheet materials that light guide plate is prepared suitable for the high-rate laser method of layouting, preparation process are as follows：1) MMA monomers are mixed evenly with deionized water, obtain MMA monomer solutions；2) SiO 2 powder, silane coupler and initiator are scattered in the MMA monomer solutions obtained by step 1), obtain mixed system；3) heating response is carried out to mixed system, filters, dries after completion of the reaction, obtain PMMA/ silicon dioxide composite materials；4) transparent PMMA moulding compounds are separately added into sandwich layer extruder and cortex extruder carries out processing and forming as core material and PMMA/ silicon dioxide composite materials as cortical material.The present invention is using new co-extrusion method production extrusion type PMMA sheet materials, product remains the advantages of good in optical property and small tolerance of extrusion type PMMA sheet materials, the case hardness of PMMA sheet materials is improved simultaneously, the PMMA sheet materials obtained by the present invention is prepared light guide plate suitable for high-rate laser points distributing method.
Description
Technical field
The invention belongs to composite technology and polymer material molding technical field, and in particular to one kind is applied at a high speed
The laser method of layouting prepares the technology of preparing of functional polyalkylene methyl methacrylate (PMMA) sheet material of light guide plate.
Background technology
Laser layouts method because its high yield rate, environmental protection and properties of product are stable, is current preparation high-performance light guide plate
Mainstream technology.High-rate laser points distributing method using dynamic galvanometer is that current preparation display and illumination light guide plate generally use
Process.Polymethyl methacrylate (hereinafter referred to as PMMA) sheet material is due to its excellent optical property and well weather-proof
Property, it is to prepare the most important raw material of high-performance light guide plate.
The PMMA sheet materials for being applied to prepare light guide plate at present have extrusion type PMMA sheet materials, casting type PMMA sheet materials and melt
It is molded PMMA sheet materials.Extrusion type PMMA sheet materials are produced using moulding compound direct extrusion molding, and good in optical property, tolerance is small, but point
Son amount is low low with case hardness, and can not layout production light guide plate applied to high-rate laser, can only use traditional silk-screen printing side
Method produces light guide plate.And silk-screen printing technique is present that yield rate is low, the production time is long, not environmentally the shortcomings of, using with very big
Limitation.
Casting type PMMA sheet materials use monomer pre-polymerization, die perfusion slurry, the method production of water-bath shaping.Pour into a mould PMMA plates
Material Automation of Manufacturing Process degree is low, and product optical property is poor, and impurity content is high, and tolerance is big, can not be applied to towards display,
The light guide plate in the fields such as household electrical appliances, instrument, and final obtained light guide plate light conversion efficiency is relatively low.
Melt forming PMMA sheet material good in optical property, case hardness is high, but technology is exclusively gathered around by Mitsubishi Li Yang company
Have, and the size of sheet material finished product is fixed, cause the cost of light guide plate that is finally produced higher.
The content of the invention
In order to overcome common extrusion type PMMA plate surface hardness low, the method that can not be layouted using high-rate laser is lacked the present invention
Put and a kind of preparation method for the feature PMMA sheet materials that light guide plate is prepared suitable for the high-rate laser method of layouting is provided.The preparation side
Method employs new co-extrusion method production extrusion type PMMA sheet materials, remains the good in optical property and public affairs of extrusion type PMMA sheet materials
The advantages of difference is small.
In order to the technical scheme realizing the object of the invention and use for：One kind be applied to high-rate laser layout method prepare leaded light
The preparation method of the feature PMMA sheet materials of plate, its preparation process are as follows：
Step 1)：MMA monomers are mixed evenly with deionized water, obtain MMA monomer solutions；
Step 2)：MMA monomers SiO 2 powder, silane coupler and initiator being scattered in obtained by step 1) are molten
In liquid, mixed system is obtained；
Step 3)：Heating response is carried out under agitation to the mixed system obtained by step 2), after completion of the reaction mistake
Filter, dry, obtain PMMA/ silicon dioxide composite materials；
Step 4)：Transparent PMMA moulding compounds is compound as the PMMA/ silica obtained by core material and step 3)
Material is separately added into sandwich layer extruder as cortical material and cortex extruder is molded, and obtains with sandwich layer/cortex or skin
The PMMA sheet materials of layer/sandwich layer/cortex composite construction.
Preferably, the MMA monomers described in step 1) and the mass ratio of deionized water are 1：1~20.
Preferably, the SiO 2 powder described in step 2), its particle size are 5 nanometers~30 microns.
It is highly preferred that the mass fraction that the SiO 2 powder described in step 2) accounts for mixed system is 1%~25%；Institute
The mass fraction that the silane coupler stated accounts for mixed system is 1%~5%；Described initiator accounts for the mass fraction of mixed system
For 0.06%~0.5%.
Wherein, described silane coupler is KH-570 or KH-550；Described initiator is azo compound or mistake
Oxide-based initiator.
Wherein, described azo compound initiator is preferably azodiisobutyronitrile；Described peroxide draws
It is preferably benzoyl peroxide to send out agent.
It is further preferred that the heating response condition described in step 3) is：Reaction temperature is 40~95 DEG C, the heat time
At least 2 hours.
It is further preferred that in step 4), the forming temperature of sandwich layer extruder is 180~250 DEG C, cortex extruder into
Type temperature is 190~255 DEG C.
It is further preferred that in step 4), core layer thickness is 0.5~20mm.
It is further preferred that in step 4), skin thickness is 0.1~0.3mm.
The technological merit of the present invention is：
1) present invention remains extrusion type PMMA sheet materials using new co-extrusion method production extrusion type PMMA sheet materials, product
Good in optical property and small tolerance the advantages of, while improve the case hardness of PMMA sheet materials, make the PMMA obtained by the present invention
Sheet material prepares light guide plate suitable for high-rate laser points distributing method.
2) the PMMA sheet material good in optical property of preparation method of the present invention production, case hardness is high, except can be applied to display,
Outside the requirement of the fields such as household electrical appliances, instrument and meter production high-performance light guide plate, in the panel and window of display, household electrical appliances and instrument and meter
Material etc. also has good application prospect.
3) the PMMA sheet materials of preparation method production of the present invention can use compared with the beautiful positive melt forming PMMA sheet materials of Mitsubishi
According to the size of customer requirement, flexibly determination final products, so as to reduce final use cost.
Brief description of the drawings
Fig. 1 is the process chart for the PMMA sheet materials that the inventive method prepares composite construction.
Embodiment
With reference to embodiment, the present invention will be further described.
As shown in figure 1, a kind of feature PMMA sheet materials that light guide plate is prepared suitable for the high-rate laser method of layouting of the present invention
Preparation method, it includes preparation process：
First, cortical material raw material mixes
MMA monomers are mixed evenly with deionized water, obtain MMA monomer solutions；SiO 2 powder, silane is even
Connection agent and initiator are scattered in the MMA monomer solutions obtained by step 1), obtain mixed system；Wherein, SiO 2 powder
Particle size be preferably 5 nanometers~30 microns because particle diameter can cause Rayleigh scattering when too small, form aberration, and particle diameter mistake
When big, strong refraction can be caused in cortex, be unfavorable for the design of laser dot-matrix, thus suitable particle size range be 5 nanometers~
30 microns.
2nd, reaction system suspension polymerisation
Heating response is carried out under agitation to resulting mixed system；Wherein, the reaction temperature of heating response is excellent
Elect 40~95 DEG C as, at least 2 hours heat time；Because reaction temperature can cause polymerisation to be made slow progress when too low, unfavorable
In production efficiency, and when reaction temperature is too high, reaction speed is too fast, and obtained composite particle diameter is too small, is unfavorable for material
Conveying in screw machine.
3rd, cortical material filtration drying
Treat to filter after suspension polymerization, dry, obtain PMMA/ silicon dioxide composite materials.
4th, it is coextruded plate forming
Using transparent PMMA moulding compounds as core material and resulting PMMA/ silicon dioxide composite materials as cortex material
Material is separately added into sandwich layer extruder and cortex extruder is molded, and the sheet material of shaping is cooled down, packing box cutting, obtained
Sheet material finished product, the sheet material finished product have the PMMA sheet materials of sandwich layer/cortex or skin/core/cortex composite construction.Wherein, sandwich layer
Thickness is preferably 0.5~20mm, and skin thickness is preferably 0.1~0.3mm.Squeezed although the core layer thickness of the present invention is conventional sheet material
Go out the thickness range that machine is produced, but skin thickness has important influence to finally preparing light guide plate, because the too thin meeting of cortex
Laser beam is caused to run through cortex, the etching finally given was put shallow, reduced light guide plate luminance, and cortex is too thick can cause wherein two
Silicon oxide particle is excessive to the scattering strength of light, so as to influence the design of laser dot-matrix.
Embodiment 1
The first step, 48.97 kilograms of MMA monomers are added into stainless steel interlayer reactor；
Second step, 48.97 kilograms of deionized waters are added into reactor；
3rd step, 1 kilogram of the silicon-dioxide powdery that particle diameter is 5 microns is added into reactor；
4th step, add 1 kilogram of KH-570 silane couplers；
5th step, add 60 grams of azodiisobutyronitrile initiator；
6th step, rotating speed 200rpm is kept stirring for, while keeps 60 DEG C of temperature of reaction kettle, polymerisation 5 hours, improve temperature
Degree continues polymerisation 3 hours to 80 DEG C；
7th step, using 100 mesh filter screen filtrations, dry after obtain PMMA/ silicon dioxide composite materials；After filtering
Further distillation and filtering, recovery obtain deionized water, MMA monomers and silicon-dioxide powdery, can be recycled reaction solution；
8th step, by transparent PMMA moulding compounds, as core material, sandwich layer extruder is added, obtained by the 7th step
PMMA/ silicon dioxide composite materials add cortex extruder as cortical material.The temperature of sandwich layer extruder is 180 DEG C, cortex
The temperature of extruder is 190 DEG C；Regulation coextrusion distributor is A/B modes, adjusting roller spacing, control core layer thickness for 3 ±
0.02mm, 0.3 ± 0.02mm；
9th step, cooling, packaging and cutting obtain the PMMA sheet material finished products with A/B composite constructions, and plate surface pencil is hard
Degree reaches 3H.After PMMA sheet materials are layouted using high-rate laser, obtained light guide plate is when light conversion ratio reaches 85%, the uniformity
Reach 91%.
Embodiment 2
The first step, 7.225 kilograms of MMA monomers are added into stainless steel interlayer reactor；
Second step, 72.25 kilograms of deionized waters are added into reactor；
3rd step, 25 kilograms of the silicon-dioxide powdery of 5 nanometers of particle size is added into reactor；
4th step, add 2.5 kilograms of KH-570 silane couplers；
5th step, add 250 grams of benzoyl peroxide initiator；
6th step, rotating speed 300rpm is kept stirring for, while keeps 40 DEG C of temperature of reaction kettle, polymerisation 5 hours, improve temperature
Degree continues polymerisation 4 hours to 60 DEG C, improves temperature to 80 DEG C, reacts 3 hours；
7th step, using 100 mesh filter screen filtrations, dry after obtain PMMA/ silicon dioxide composite materials；After filtering
Further distillation and filtering, recovery obtain deionized water, MMA monomers and silicon-dioxide powdery, can be recycled reaction solution；
8th step, by transparent PMMA moulding compounds, as core material, sandwich layer extruder is added, obtained by the 7th step
PMMA/ silicon dioxide composite materials add cortex extruder as cortical material.The temperature of sandwich layer extruder is 200 DEG C, cortex
225 DEG C of the temperature of extruder；Regulation coextrusion distributor is A/B/A modes, adjusting roller spacing, control core layer thickness for 6 ±
0.02mm, 0.3 ± 0.02mm；
9th step, cooling, packaging and cutting obtain the PMMA sheet material finished products with A/B/A composite constructions, plate surface pencil
Hardness reaches 3H.After PMMA sheet materials are layouted using high-rate laser, obtained light guide plate is when light conversion ratio reaches 85%, uniformly
Degree reaches 93%.
Embodiment 3
The first step, 3.31 kilograms of MMA monomers are added into stainless steel interlayer reactor；
Second step, 66.19 kilograms of deionized waters are added into reactor；
3rd step, 25 kilograms of the silicon-dioxide powdery of about 30 microns of particle size is added into reactor；
4th step, add 5 kilograms of KH-550 silane couplers；
5th step, add 500 grams of azodiisobutyronitrile initiator；
6th step, rotating speed 200rpm is kept stirring for, while keeps 55 DEG C of temperature of reaction kettle, polymerisation 8 hours, improve temperature
Degree continues polymerisation 2 hours to 95 DEG C；
7th step, using 200 mesh filter screen filtrations, dry after obtain PMMA/ silicon dioxide composite materials；After filtering
Further distillation and filtering, recovery obtain deionized water, MMA monomers and silicon-dioxide powdery, can be recycled reaction solution；
8th step, by transparent PMMA moulding compounds, as core material, sandwich layer extruder is added, obtained by the 7th step
PMMA/ silicon dioxide composite materials add cortex extruder as cortical material.The temperature of sandwich layer extruder is 220 DEG C, cortex
The temperature of extruder is 255 DEG C；Regulation regulation coextrusion distributor is A/B/A modes, adjusting roller spacing, controls the core layer thickness to be
20 ± 0.05mm, 0.1 ± 0.02mm；
9th step, cooling, packaging and cutting obtain the PMMA sheet material finished products with A/B/A composite constructions, the surface lead of sheet material
Hardness is 3H, light transmittance 92.5%, can be directly used as the panel material of display or instrument and meter.PMMA sheet materials are used
After high-rate laser is layouted, for obtained light guide plate when light conversion ratio reaches 85%, the uniformity reaches 90%.
Table 1 is applicable cases pair of 1-3 of the embodiment of the present invention products with existing product when laser layouts production light guide plate
Than.As can be seen that the application prospect that the product use cost of the present invention is relatively low, good.
Table 1
| Thickness deviation | Light conversion ratio | Fraction defective | Cost | Light guide plate application | |
| Product of the present invention | ±0.03mm | About 85% | One thousandth | It is low | It has been shown that, illumination, electronics |
| Pour into a mould PMMA plates | ±0.3mm | About 75% | 3 percent | In | Illumination |
| Mitsubishi's PMMA plates | ±0.01mm | About 85% | One thousandth | It is high | It has been shown that, illumination, electronics |
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (10)
1. a kind of preparation method for the feature PMMA sheet materials that light guide plate is prepared suitable for the high-rate laser method of layouting, its feature exist
In：Preparation process is as follows：
Step 1)：MMA monomers are mixed evenly with deionized water, obtain MMA monomer solutions；
Step 2)：SiO 2 powder, silane coupler and initiator are scattered in the MMA monomer solutions obtained by step 1)
In, obtain mixed system；
Step 3)：Heating response is carried out to the mixed system obtained by step 2), filters, dry after completion of the reaction, obtain PMMA/
Silicon dioxide composite material；
Step 4)：Using transparent PMMA moulding compounds as the PMMA/ silicon dioxide composite materials obtained by core material and step 3)
As cortical material, it is separately added into sandwich layer extruder and cortex extruder carries out processing and forming, obtain with sandwich layer/cortex or skin
The PMMA sheet materials of layer/sandwich layer/cortex composite construction.
2. the preparation of the feature PMMA sheet materials according to claim 1 that light guide plate is prepared suitable for the high-rate laser method of layouting
Method, it is characterised in that：The mass ratio of MMA monomers and deionized water described in step 1) is 1：1~20.
3. the preparation of the feature PMMA sheet materials according to claim 1 that light guide plate is prepared suitable for the high-rate laser method of layouting
Method, it is characterised in that：SiO 2 powder described in step 2), its particle size are 5 nanometers~30 microns.
4. the preparation of the feature PMMA sheet materials according to claim 1 that light guide plate is prepared suitable for the high-rate laser method of layouting
Method, it is characterised in that：The mass fraction that SiO 2 powder described in step 2) accounts for mixed system is 1%~25%；Institute
The mass fraction that the silane coupler stated accounts for mixed system is 1%~5%；Described initiator accounts for the mass fraction of mixed system
For 0.06%~0.5%.
5. the feature PMMA sheet materials for being applied to the high-rate laser method of layouting and preparing light guide plate according to claim 1 or 4
Preparation method, it is characterised in that：Described silane coupler is KH-570 or KH-550；Described initiator is azo chemical combination
Thing or peroxide type initiators.
6. the preparation of the feature PMMA sheet materials according to claim 5 that light guide plate is prepared suitable for the high-rate laser method of layouting
Method, it is characterised in that：Described azo compound initiator is azodiisobutyronitrile；Described peroxide type initiators
For benzoyl peroxide.
7. the preparation of the feature PMMA sheet materials according to claim 1 that light guide plate is prepared suitable for the high-rate laser method of layouting
Method, it is characterised in that：Heating response described in step 3), its reaction temperature are 40~95 DEG C, and the heat time at least 2 is small
When.
8. the preparation of the feature PMMA sheet materials according to claim 1 that light guide plate is prepared suitable for the high-rate laser method of layouting
Method, it is characterised in that：In step 4), the forming temperature of sandwich layer extruder is 180~250 DEG C, the shaping temperature of cortex extruder
Spend for 190~255 DEG C.
9. the preparation of the feature PMMA sheet materials according to claim 1 that light guide plate is prepared suitable for the high-rate laser method of layouting
Method, it is characterised in that：In step 4), core layer thickness is 0.5~20mm.
10. the system of the feature PMMA sheet materials according to claim 1 that light guide plate is prepared suitable for the high-rate laser method of layouting
Preparation Method, it is characterised in that：In step 4), skin thickness is 0.1~0.3mm.
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| CN103265782A (en) * | 2013-05-06 | 2013-08-28 | 广东华声电器股份有限公司 | PMMA/MBS surface layer co-extrusion material and preparation method thereof |
| CN104356273A (en) * | 2014-10-29 | 2015-02-18 | 上海大学 | Method for preparing nanometer silicon dioxide composite material with super concentrated emulsion |
| CN106977641A (en) * | 2017-04-14 | 2017-07-25 | 苏州双象光学材料有限公司 | The method of one-step synthesis method optical grade PMMA sheet materials |
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2017
- 2017-08-31 CN CN201710771809.8A patent/CN107553858B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101059568A (en) * | 2007-06-21 | 2007-10-24 | 凯邦科技有限公司 | Production method of light scattering light conducting board and the light conducting board produced therefrom |
| CN101967258A (en) * | 2010-09-26 | 2011-02-09 | 贵州天控自动化信息工程有限公司 | Process for preparing light-scattering polymer light guide plate by using mold transferring dot matrix method |
| CN103265782A (en) * | 2013-05-06 | 2013-08-28 | 广东华声电器股份有限公司 | PMMA/MBS surface layer co-extrusion material and preparation method thereof |
| CN104356273A (en) * | 2014-10-29 | 2015-02-18 | 上海大学 | Method for preparing nanometer silicon dioxide composite material with super concentrated emulsion |
| CN106977641A (en) * | 2017-04-14 | 2017-07-25 | 苏州双象光学材料有限公司 | The method of one-step synthesis method optical grade PMMA sheet materials |
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