CN108189437B - Continous way polystyrene leaded light board production technology and polystyrene light guide plate - Google Patents
Continous way polystyrene leaded light board production technology and polystyrene light guide plate Download PDFInfo
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- CN108189437B CN108189437B CN201711456815.0A CN201711456815A CN108189437B CN 108189437 B CN108189437 B CN 108189437B CN 201711456815 A CN201711456815 A CN 201711456815A CN 108189437 B CN108189437 B CN 108189437B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00663—Production of light guides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F112/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F112/02—Monomers containing only one unsaturated aliphatic radical
- C08F112/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F112/06—Hydrocarbons
- C08F112/08—Styrene
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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- Ophthalmology & Optometry (AREA)
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- Organic Chemistry (AREA)
- Planar Illumination Modules (AREA)
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Abstract
The present invention provides a kind of continous way polystyrene leaded light board production technology and polystyrene light guide plates, are related to light guide plate technical field of producing, include the following steps: that first polymerization reaction will be carried out in styrene monomer addition reaction kettle, polystyrene melt is made；Polystyrene melt heat preservation is delivered to plate forming system again, polystyrene melt is processed into polystyrene light guide plate by plate forming system, alleviate the existing light guide plate using the plasticizing preparation of polystyrene master batch heating melting, the crystal point not formed there is only the micro stiff material not being plasticized sufficiently, and since the presence of partially carbonized polystyrene makes plate face yellowing, it is caused to go out light uneven, light transmittance is poor, the image quality clarity of liquid crystal display device is not can guarantee, it eliminates plate face and expects there is the crystal point formed and yellowing optical phenomenon because stiff, the technical effect for guaranteeing the image quality display resolution of liquid crystal display device is reached.
Description
Technical field
The present invention relates to light guide plate technical field of producing, raw more particularly, to a kind of continous way polystyrene light guide plate
Production. art and polystyrene light guide plate.
Background technique
As industrial society develops into the informatization society of height, the electronics as the medium for showing and transmitting a variety of information
The importance of display device increasingly increases.The especially compound liquid crystal display device of liquid crystal and semiconductor technology is widely used in
Various fields, but liquid crystal of this liquid crystal display device itself can not shine, and need that light source is arranged behind device, and lead to
It crosses light guide plate and linear light source is converted into area source, enable a device to uniformly light-emitting, show various clearly image quality.
Traditional light guide plate is mostly prepared using polymethyl methacrylate, however due to polymethyl methacrylate
Special chemical structure, keep it very fragile to moisture, lead to the light guide plate of this material size under hot and humid environment
Stability is poor, is prone to bending, and influences the picture display effect of liquid crystal display device.
Present someone has developed polystyrene light guide plate, is process using polystyrene master batch plasticizing, but polyphenyl second
It is uniform to be difficult plastifying fusion in plasticizing process for alkene master batch, and part polystyrene can be carbonized in plasticizing process, so that poly-
The crystal point not formed there is only the micro stiff material not being plasticized sufficiently on styrene light guide plate, and due to partially carbonized polyphenyl second
The presence of alkene makes plate face yellowing, and causing it to go out, light is uneven, and light transmittance is poor, and the image quality that not can guarantee liquid crystal display device is clear
Degree.
In view of this, the present invention is specifically proposed.
Summary of the invention
It is existing to alleviate one of the objects of the present invention is to provide a kind of continous way polystyrene leaded light board production technology
Polystyrene light guide plate be process using polystyrene master batch plasticizing, it is uniform that polystyrene master batch is difficult plastifying fusion, and
Part polystyrene can be carbonized in plasticizing process, so that there is only the micro stiff material not being plasticized sufficiently on polystyrene light guide plate
And the crystal point formed causes it to go out light uneven and since the presence of partially carbonized polystyrene makes plate face yellowing, light transmission
Rate is poor, not can guarantee the image quality clarity of liquid crystal display device.
Continous way polystyrene leaded light board production technology provided by the invention, includes the following steps:
(a) styrene monomer is added in reaction kettle and carries out polymerization reaction, polystyrene melt is made；
(b) polystyrene melt heat preservation is delivered to plate forming system, is melted polystyrene by plate forming system
Body is processed into polystyrene light guide plate.
Further, in step (b), the plate forming system, including the first mixer, the gear set gradually
Pump, the second mixer, extrusion die and calender.
Further, the calender includes at least two stacks, is provided with micro- knot on at least one stack
Structure embossing.
Further, the plate forming system further includes cooler, and the cooler is used for the polyphenyl of calendering formation
Ethylene light guide plate is cooled down.
Further, the continous way polystyrene leaded light board production technology, further includes step (s), the step (s) sets
It is placed between the step (a) and step (b), the step (s) is that polystyrene melt is carried out devolatilization and filtration treatment.
Further, in step (a), the number-average molecular weight for the polystyrene melt polymerizeing is 5-20 ten thousand, preferably
For 10-15 ten thousand.
Further, in step (b), the temperature for keeping the temperature conveying is 200-250 DEG C, preferably 220-230 DEG C.
Further, in step (a), polymerization temperature is 110-160 DEG C, preferably 120-140 DEG C.
The second object of the present invention be to provide above-mentioned continous way polystyrene leaded light board production technology be prepared it is poly-
Styrene light guide plate, the polystyrene light guide plate with a thickness of 0.5-5mm, preferably 1-3mm.
Further, at least one plate face of the polystyrene light guide plate is provided with micro-structure burr, the micro-structure
The cross section of burr is at least one of semicircle shape, wavy and triangular shape.
Continous way polystyrene leaded light board production technology provided by the invention directly will system after polymerizeing styrene monomer
The polystyrene melt plate forming processing obtained, is made polystyrene light guide plate, without carrying out plasticizing processing, so that polystyrene
Light guide plate eliminates the crystal point formed by the micro stiff material not being plasticized sufficiently, also avoids because plasticizing processing is so that part polyphenyl
Ethylene is carbonized and makes the problem of polystyrene light guide plate yellowing light, so that manufactured polystyrene light guide plate uniform in light emission, thoroughly
Light rate is high, ensure that the image quality display resolution of liquid crystal display device.
In addition, continous way polystyrene leaded light board production technology provided by the invention, due to reducing polystyrene master batch
Preparation and fusion plastification technique, save a large amount of energy consumption, reduce the production cost of polystyrene light guide plate.
Polystyrene light guide plate uniform in light emission provided by the invention, light transmittance is high, and plate face eliminates plate face because of deadlock without yellow light
There is the crystal point formed and yellowing optical phenomenon in material, ensure that the image quality display resolution of liquid crystal display device.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart for the continous way polystyrene leaded light board production technology that the embodiment of the present invention 1 provides；
Fig. 2 is the structural schematic diagram for the polystyrene light guide plate that embodiment 1 provides；
Fig. 3 is the structural schematic diagram for the polystyrene light guide plate that embodiment 2 provides；
Fig. 4 is the structural schematic diagram for the polystyrene light guide plate that embodiment 3 provides.
Icon: 101- reaction kettle；102- devolatilizer；103- filter；The first mixer of 104-；105- gear pump；106-
Second mixer；107- extrusion die；108- tri-roll press machine；109- water-cooling cooler；110- plate collecting box；Low group of 111-
Divide cooler；112- surge tank；113- buffers cooler；114- vacuum system；115- trash eliminator.
Specific embodiment
Technical solution of the present invention will be clearly and completely described below, it is clear that described embodiment is this hair
Bright a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Existing conventional light guiding plate mostly uses polystyrene acrylic acid methyl esters to be prepared, however due to polymethyl
The special chemical structure of sour methyl esters, keeps it very fragile to moisture, causes the light guide plate of this material in hot and humid environment
Lower poor dimensional stability, is prone to bending, and influences the picture display effect of liquid crystal display device.
Present someone has developed polystyrene light guide plate, and first passing through styrene monomer polymerization becomes polystyrene, then will gather
Styrene is processed into polystyrene master batch, finally again by the plasticizing post-processing of polystyrene master batch heating melting at polystyrene leaded light
Plate.But due in the engineering that polystyrene master batch heating melting is plasticized, it is difficult to ensure that all polystyrene master batches by
It is hot uniformly all to melt, therefore, often has the small stiff material that part does not melt completely and be present on polystyrene light guide plate, lead
Cause the transmission effects of polystyrene light guide plate poor, there are the crystal points that multiple stiff material are formed, while during being plasticized processing, portion
Divide polystyrene that can be carbonized, leads to polystyrene light guide plate yellowing light, not can guarantee the image quality clarity of liquid crystal display device
Technical problem.
According to an aspect of the present invention, the present invention provides a kind of continous way polystyrene leaded light board production technology, packets
Include following steps:
(a) styrene monomer is added in reaction kettle and carries out polymerization reaction, polystyrene melt is made；
(b) polystyrene melt heat preservation is delivered to plate forming system, is melted polystyrene by plate forming system
Body is processed into polystyrene light guide plate.
Continous way polystyrene leaded light board production technology provided by the invention directly will system after polymerizeing styrene monomer
The polystyrene melt plate forming processing obtained, is made polystyrene light guide plate, without carrying out plasticizing processing, so that polystyrene
Plate eliminates the crystal point formed by the micro stiff material not being plasticized sufficiently, also avoids because plasticizing processing is so that part polystyrene
Carbonization, and lead to the problem of polystyrene light guide plate yellowing light, so that manufactured polystyrene light guide plate uniform in light emission, light transmittance
Height ensure that the image quality display resolution of liquid crystal display device.
In addition, continous way polystyrene leaded light board production technology provided by the invention, due to reducing polystyrene master batch
Preparation and fusion plastification technique, save a large amount of energy consumption, reduce the production cost of polystyrene light guide plate.
In the preferred embodiment of the present invention, in step (b), plate forming system, including what is set gradually
First mixer, gear pump, the second mixer, extrusion die and calender.
In the preferred embodiment of the invention, the first mixer, gear pump, the second mixer and extrusion die are successively
Connection, the first mixer are used to polystyrene melt carrying out mixed once, and the input terminal of gear pump is connected with the first mixer
Logical, gear pump is to lead to by the swept volume variation and movement formed between pumping cylinder and meshing gear to convey polystyrene melt
It crosses and polystyrene melt is conveyed using gear pump, so that mutual extrusion of the polystyrene melt by gear pump meshing gear, two
Secondary mixing it is more uniform；Second mixer is connected with the output end of gear pump, by the mixed polyphenyl of gear pump extrusion
Ethylene melt enters the second mixer and is mixed three times, to guarantee that the polystyrene melt for entering extrusion die mixes more
Uniformly.For extrusion die for that mixed polystyrene melt will be squeezed out three times by extrusion die, calender is used for will
Polystyrene melt carries out calendering formation, polystyrene light guide plate is made.
In the preferred embodiment of the present invention, calender includes at least two stacks, wherein at least one pressure
Prolong and is provided with micro-structure embossing on roller.
In order to improve polystyrene light guide plate outgoing light homogeneity, need to be provided with micro-structure on polystyrene light guide plate convex
Line is provided with micro-structure embossing, so that the polystyrene being prepared in a preferred embodiment of the invention, on stack
Micro-structure burr is formed on light guide plate.
In typical but non-limiting embodiment of the invention, calender can be two roll calender, or
Tri-roll press machine, preferably tri-roll press machine.
It, can be to be provided with micro-structure on a stack when selecting tri-roll press machine processing to prepare polystyrene light guide plate
Embossing can also be provided with micro-structure embossing on two stacks, and the cross section of micro-structure embossing can be semicircle, wave
At least one of shape and triangle.
In present invention further optimization embodiment, guide-lighting micro-structure embossing, Ling Yigen are provided on a pressure roller
Reflection micro-structure embossing is provided on pressure roller, so that being provided in a plate face of manufactured polystyrene light guide plate guide-lighting micro-
Structure burr is provided with reflection micro-structure burr in another plate face, so as to exist instead of the conventionally employed technology that is printed on one side
The technique of the plate face printing reflection micro-structure embossing of polystyrene light guide plate, reduces environmental pollution, more can effectively promote
Into the cooperative development of economy and environment.
In the preferred embodiment of the present invention, plate forming system further includes cooler, and cooler will be for that will press
Prolong molding polystyrene light guide plate to be cooled down.
In order to accelerate calendering formation polystyrene light guide plate cooling velocity, in a kind of preferred embodiment of the invention
In, it is additionally provided with cooler in plate forming system, cooler is set to the rear end of calender, the polyphenyl second for calendering formation
Alkene light guide plate is cooled down, it is preferred that water-cooling cooler is selected to cool down the polystyrene light guide plate of calendering formation.
In the preferred embodiment of the present invention, continous way polystyrene leaded light board production technology further includes step
(s), step (s) is set between step (a) and step (b), and step (s) is to carry out polystyrene melt at devolatilization and filtering
Reason.
By the way that polystyrene melt is carried out devolatilization and filtration treatment, by oligomer component in polystyrene melt and low
Boiling point component is removed, and is separated to oligomer component and low boiling component, to recycle low boiling component, reduces raw material
Waste.
In the present invention, oligomer component includes styrene oligomer；, low boiling component includes styrene monomer etc..
By the way that polystyrene melt is filtered processing, the impurity in polystyrene melt is removed, it is poly- to guarantee
The performance of styrene light guide plate.
In the preferred embodiment of the present invention, the oligomer component emitted and low boiling point are handled by devolatilization
Oligomer component is separated by trash eliminator and is removed, then low boiling component is recycled by component, is continued after cooling
It is discharged into reaction kettle, polymerization reaction is carried out together with styrene monomer, it is energy saving to reduce the waste of raw material.
In the preferred embodiment of the present invention, in step (a), the number for the polystyrene melt polymerizeing is equal
Molecular weight is 5-20 ten thousand, preferably 10-15 ten thousand.
By controlling the degree of polymerization of styrene monomer, so that the number-average molecular weight of the polystyrene generated is 5-20 ten thousand, with
So that the polystyrene light guide plate being prepared has good intensity and light transmittance, especially when the number of polystyrene melt is equal
Molecular weight is 10-15 ten thousand, it is prepared made of polystyrene light guide plate there is more excellent comprehensive performance.
In the preferred embodiment of the present invention, in step (b), the temperature for keeping the temperature conveying is 200-250 DEG C, excellent
It is selected as 220-230 DEG C.
It is 200-250 DEG C by controlling the temperature of the heat preservation conveying for the polystyrene melt being polymerized, to avoid poly-
There is carbonization phenomenon during transportation in styrene melt, and the polystyrene for influencing the processing of subsequent plate and being prepared is guide-lighting
The comprehensive performance of plate, especially when the temperature of heat preservation conveying is 220-230 DEG C, the polystyrene light guide plate that is prepared it is comprehensive
Close performance more preferably.
In the preferred embodiment of the present invention, in step (a), polymerization temperature is 110-160 DEG C, preferably
120-140℃。
Temperature when by control styrene monomer polymerization is 110-160 DEG C, so that the polystyrene melt generated
The narrowly distributing of molecular weight, excellent combination property, especially when polymerization temperature be 120-140 DEG C, it is prepared come out polystyrene
The molecular weight distribution of melt is narrower, and comprehensive performance is more excellent.
According to another aspect of the present invention, the present invention provides above-mentioned continous way polystyrene leaded light board production technology systems
Standby obtained polystyrene light guide plate, the polystyrene light guide plate with a thickness of 0.5-5mm, preferably 1-3mm.
In the present invention, the thickness of polystyrene light guide plate can be adjusted according to the requirement of client, and polystyrene is led
The typical but non-limiting thickness for example 0.5 of tabula rasa, 0.6,0.7,0.8,0.9,1,1.2,1.5,1.8,2,2.2,2.5,
2.8,3,3.2,3.5,3.8,4,4.2,4.5,4.8 or 5mm.
By control polystyrene light guide plate with a thickness of 0.5-5mm, to keep good light transmission and refraction performance,
It is made especially when polystyrene light guide plate is with a thickness of 1-3mm to meet the requirement of various liquid crystal display devices
The light transmission of polystyrene light guide plate made of standby is more preferably.
In the preferred embodiment of the present invention, at least one plate face of polystyrene light guide plate is provided with micro-structure
Burr, the cross section of micro-structure burr are one of semicircle shape, wavy and triangular shape.
In order to improve polystyrene light guide plate outgoing light homogeneity, micro-structure burr is provided on polystyrene light guide plate,
The cross section of micro-structure burr both can be one of semicircle shape, wavy or triangular shape, be also possible to hemispherical and triangle
Shape combines or hemispherical is combined with waveform, can also combine for hemispherical, wavy and triangular shape.
Polystyrene light guide plate provided by the invention can be provided with micro-structure burr with a plate face, can also two plate faces
It is provided with micro-structure burr, i.e. a plate face is provided with guide-lighting micro-structure burr, another plate face is provided with reflection micro-structure
Burr.
Technical solution provided by the invention is further described below with reference to embodiment and comparative example.
Embodiment 1
A kind of polystyrene light guide plate is present embodiments provided, is prepared according to following technique, as shown in Figure 1:
(a) styrene monomer is added in reaction kettle 101 and carries out polymerization reaction, control polymerization temperature is 120 DEG C, and number is made
The polystyrene melt that average molecular weight is 50,000；
(s) polystyrene melt is passed sequentially through into devolatilizer 102 after the discharge of reaction kettle 101 and filter 103 takes off
It waves and filtration treatment, send plate manufacturing process.And it is the oligomer component and low boiling component that emit from devolatilizer 102 is first
Oligomer component is separated by trash eliminator 115 and is removed, then low boiling component will be delivered to low component cooler again
After 111 is cooling, continue to be discharged into reaction kettle 101 and recycle；In addition, the top of reaction kettle 101 is also communicated with surge tank 112,
Surge tank 112 is communicated with buffering cooler 113, and buffering cooler 113 is communicated with vacuum system 114, vacuum system 114 with low group
Cooler 111 is divided to be connected, after being cooled down in order to the low component that will be collected in surge tank 112 via low component cooler 111, one
And it is discharged into reaction kettle 101 and recycles；
(b) filtered polystyrene melt is delivered to plate forming system in 200 DEG C of heat preservations, it is successively mixed by first
Clutch 104, gear pump 105, extrusion die 107, the second mixer 106, tri-roll press machine 108 and water-cooling cooler 109, that is, make
It obtains with a thickness of 2mm polystyrene light guide plate, and polystyrene light guide plate is collected by plate collecting box 110, wherein three rollers
Waveform micro-structure embossing is provided on one stack of calender 108, other two stack is mirror surface smooth roll, made
Polystyrene light guide plate structural schematic diagram as shown in Fig. 2, from figure 2, it is seen that polystyrene light guide plate provided in this embodiment
It is wavy micro-structure bar shaped burr with cross section.
Embodiment 2
A kind of polystyrene light guide plate is present embodiments provided, is prepared according to following technique:
(a) styrene monomer is added in reaction kettle and carries out polymerization reaction, control polymerization temperature is 110 DEG C, and it is equal that number is made
The polystyrene melt that molecular weight is 200,000；
(s) polystyrene melt is passed sequentially through into devolatilizer and filter carries out devolatilization and filtration treatment, and will be from devolatilization
The low boiling component emitted in device and surge tank, which continues to be discharged into reaction kettle, to be recycled；
(b) filtered polystyrene melt is delivered to plate forming system in 230 DEG C of heat preservations, it is successively mixed by first
Clutch, gear pump, the second mixer, extrusion die, tri-roll press machine and water-cooling cooler obtain with a thickness of 2mm polyphenyl second
Alkene light guide plate.Wherein, hemispherical leaded light embossing is provided on a stack of tri-roll press machine, other two stack is mirror
Face smooth roll, the structural schematic diagram of made polystyrene light guide plate are provided in this embodiment poly- as shown in figure 3, as can be seen from Figure 3
It is semicircular micro-structure dot burr that styrene light guide plate, which has cross section,.
Embodiment 3
A kind of polystyrene light guide plate is present embodiments provided, is prepared according to following technique:
(a) styrene monomer is added in reaction kettle and carries out polymerization reaction, control polymerization temperature is 125 DEG C, and it is equal that number is made
The polystyrene melt that molecular weight is 100,000；
(s) polystyrene melt is passed sequentially through into devolatilizer and filter carries out devolatilization and filtration treatment, and will be from devolatilization
The low boiling component emitted in device and surge tank, which continues to be discharged into reaction kettle, to be recycled；
(b) filtered polystyrene melt is delivered to plate forming system in 220 DEG C of heat preservations, it is successively mixed by first
Clutch, gear pump, the second mixer, extrusion die, tri-roll press machine and water-cooling cooler obtain with a thickness of 2mm polyphenyl second
Alkene light guide plate.Wherein, cross section is provided on a stack of tri-roll press machine to emboss for semicircular micro-structure, another
Cross section is provided on stack as wavy micro-structure embossing, remaining stack is mirror surface smooth roll, and made is poly-
The structural schematic diagram of styrene light guide plate, as shown in figure 4, as can be seen from Figure 4, polystyrene light guide plate one provided in this embodiment
It is the micro-structure dot burr of semicircle shape that plate face, which has cross section, and it is wavy micro-structure bar shaped that another plate face, which has cross section,
Burr.
Embodiment 4
Present embodiments provide it is a kind of with a thickness of 2mm polystyrene light guide plate, preparation process it is different from embodiment 3 it
Be in, in step (a), the number-average molecular weight of made polystyrene melt is 150,000, remaining step with 3 phase of embodiment
Together, details are not described herein.
Comparative example 1
This comparative example provide it is a kind of with a thickness of 2mm polystyrene light guide plate, use number-average molecular weight for 150,000 polyphenyl
Ethylene master batch is prepared by heating melting plasticizing, and structure is identical as the modified polystyrene light guide plate that embodiment 3 provides.
Comparative example 2
It is commercially available with a thickness of 2mm polymethacrylates light guide plate that this comparative example provides one kind, and structure is mentioned with embodiment 4
The polystyrene light guide plate of confession is identical.
By the polystyrene light guide plate that embodiment 1-4 is provided and the polystyrene light guide plate that comparative example 1-2 is provided and poly- first
Base methyl acrylate light guide plate carries out light transmittance, light-emitting uniformity and rate of water absorption test, and test result is as follows shown in table 1:
1 polystyrene light guide plate test result data table of table
The performance data of the polystyrene light guide plate provided from 1 embodiment 1-4 of table can be seen that use provided by the invention
Its light transmittance of the polystyrene light guide plate of continous way polystyrene leaded light board production technology preparation is more than 90%, and rate of water absorption is small
In 0.04%, plate face can satisfy the requirement of liquid crystal display without yellow light, uniform in light emission non-crystal point.
The performance data of the polystyrene light guide plate provided from 1 comparative example 1 of table can be seen that using normal polystyrene mother
Polystyrene light guide plate its light transmittance that grain heating melting plasticizing is prepared is lower, plate face yellowing light, and light is uneven out, has
Crystal point exists, and comprehensive performance is poor.
The performance data of the polymethyl methacrylate light guide plate provided from 1 comparative example 2 of table can be seen that commercially available poly- first
The light transmittance of base methyl acrylate light guide plate is high, still its rate of water absorption is higher than 0.3% to uniform in light emission, in hot and humid environment
Under, it easily absorbs water, deformation occurs, influences the normal use of liquid crystal display.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (14)
1. a kind of continous way polystyrene leaded light board production technology, which comprises the steps of:
(a) styrene monomer is added in reaction kettle and carries out polymerization reaction, polystyrene melt is made；
(b) polystyrene melt heat preservation is delivered to plate forming system, is added polystyrene melt by plate forming system
Work is at polystyrene light guide plate；
In step (b), the plate forming system, including set gradually the first mixer, gear pump, the second mixer,
Extrusion die and calender.
2. continous way polystyrene leaded light board production technology according to claim 1, which is characterized in that the calender packet
At least two stacks are included, micro-structure embossing is provided on at least one stack.
3. continous way polystyrene leaded light board production technology according to claim 1, which is characterized in that the plate forming
System further includes cooler, and the cooler is for cooling down the polystyrene light guide plate of calendering formation.
4. continous way polystyrene leaded light board production technology according to claim 1-3, which is characterized in that also wrap
Step (s) is included, the step (s) is set between the step (a) and step (b), and the step (s) is to melt polystyrene
Body carries out devolatilization and filtration treatment.
5. continous way polystyrene leaded light board production technology according to claim 1-3, which is characterized in that in step
Suddenly in (a), the number-average molecular weight for the polystyrene melt polymerizeing is 5-20 ten thousand.
6. continous way polystyrene leaded light board production technology according to claim 5, which is characterized in that in step (a), gather
The number-average molecular weight for closing obtained polystyrene melt is 10-15 ten thousand.
7. continous way polystyrene leaded light board production technology according to claim 1-3, which is characterized in that in step
Suddenly in (b), the temperature for keeping the temperature conveying is 200-250 DEG C.
8. continous way polystyrene leaded light board production technology according to claim 7, which is characterized in that in step (b),
The temperature of heat preservation conveying is 220-230 DEG C.
9. continous way polystyrene leaded light board production technology according to claim 1-3, which is characterized in that in step
Suddenly in (a), polymerization temperature is 110-160 DEG C.
10. continous way polystyrene leaded light board production technology according to claim 9, which is characterized in that in step (a)
In, polymerization temperature is 120-140 DEG C.
11. the polyphenyl that continous way polystyrene leaded light board production technology according to claim 1-7 is prepared
Ethylene light guide plate, which is characterized in that the polystyrene light guide plate with a thickness of 0.5-5mm.
12. polystyrene light guide plate according to claim 11, which is characterized in that the thickness of the polystyrene light guide plate
For 1-3mm.
13. polystyrene light guide plate according to claim 11 or 12, which is characterized in that the polystyrene light guide plate
At least one plate face is provided with micro-structure burr.
14. polystyrene light guide plate according to claim 13, which is characterized in that the cross section of the micro-structure burr is
At least one of semicircle shape, wavy and triangular shape.
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| CN201711456815.0A CN108189437B (en) | 2017-12-28 | 2017-12-28 | Continous way polystyrene leaded light board production technology and polystyrene light guide plate |
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| CN201711456815.0A CN108189437B (en) | 2017-12-28 | 2017-12-28 | Continous way polystyrene leaded light board production technology and polystyrene light guide plate |
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| CN108189437B true CN108189437B (en) | 2019-03-19 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013026834A1 (en) * | 2011-08-23 | 2013-02-28 | Evonik Röhm Gmbh | Continuous method for the production of light guide plates |
| CN105111655A (en) * | 2015-09-16 | 2015-12-02 | 梁志勇 | Light guide plate manufacturing technological process system |
| CN206394013U (en) * | 2017-01-12 | 2017-08-11 | 东莞市巨信康光电有限公司 | A kind of forming light guide plate machine |
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2017
- 2017-12-28 CN CN201711456815.0A patent/CN108189437B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013026834A1 (en) * | 2011-08-23 | 2013-02-28 | Evonik Röhm Gmbh | Continuous method for the production of light guide plates |
| CN105111655A (en) * | 2015-09-16 | 2015-12-02 | 梁志勇 | Light guide plate manufacturing technological process system |
| CN206394013U (en) * | 2017-01-12 | 2017-08-11 | 东莞市巨信康光电有限公司 | A kind of forming light guide plate machine |
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| CN108189437A (en) | 2018-06-22 |
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