CN104610677A - Production method of PS diffusion plate and PS diffusion plate - Google Patents
Production method of PS diffusion plate and PS diffusion plate Download PDFInfo
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- CN104610677A CN104610677A CN201510057779.5A CN201510057779A CN104610677A CN 104610677 A CN104610677 A CN 104610677A CN 201510057779 A CN201510057779 A CN 201510057779A CN 104610677 A CN104610677 A CN 104610677A
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Abstract
The invention discloses a production method of a PS diffusion plate and the PS diffusion plate. The production method comprises the following steps, namely preparing the raw materials, manufacturing an optical masterbatch, and performing extrusion molding, the step of manufacturing the optical masterbatch includes selecting the raw materials and the powder mixtures containing a diffusant, an anti-UV agent, an oxidizing agent, a light stabilizer and a lubrication dispersing agent to manufacture the optical masterbatch; the step of performing extrusion molding includes selecting one or more mixtures of the raw materials, the optical masterbatch, a HIPS, a PMMA plastic granule, a PO plastic granule, a PP plastic granule, a PE plastic granule and a MS plastic granule, after stirring uniformly, putting into an extrusion forming machine, and forming a diffusion plate sheet by the extrusion forming machine. By adopting the production method, the optical performance is changed from the inside of the diffusion plate so that the chemical polymers with different reflection rates are uniformly dispersed on the surface of the PS diffusion plate, and the diffusion plate has a good optical lamp shadow shielding performance, the diffusion plate is applied to a direct type LED television for reducing the numbers of the optical films or the LED lamps and the effect with the same taste as the backlight module need is achieved.
Description
Technical field
The present invention relates to the production technical field of diffuser plate, refer more particularly to a kind of PS diffuser plate production method and PS diffuser plate.
Background technology
Diffuser plate has been widely used in, in the field such as direct type LED television and LED flat lamp illumination, can making the abundant scattering of incident light, realizing softer, uniform radiation response at present.In general technology, diffuser plate is when producing solid slab, add diffusant in the feed, diffusant is evenly distributed in sheet material, make light through sheet material, reflect when encountering diffusant particle, reflect and the effect of scattering, thus make light can not expose light source through sheet material uniformly, reach the change from pointolite to area source.
And be applicable to the diffuser plate of straight-down negative LED backlight of television module and LED flat lamp illumination, high briliancy, high diffusibility must be had and improve the uniform diffusion effect of luminescence distribution of backlight.At present, major part producer goes out frosted line or " V-cut " structure of sags and crests by wherein a surface or two surface working at conventional diffusion plate, wish to improve diffuser plate to the dispersing property of light, the light that LED point source of light is launched can homogenizing after being launched by diffuser plate, this by physical geometry optical principle change diffuser plate configuration of surface and improve the dispersing property of diffuser plate to light, although have certain dissemination, effect is still not satisfactory.
Summary of the invention
In order to improve the light dispersing property being applied to PS diffuser plate in straight-down negative LED TV and LED flat lamp further, making PS diffuser plate have better optical obscurations lamp shadow performance, the invention provides a kind of PS diffuser plate production method and PS diffuser plate.
According to a first aspect of the invention, the invention provides a kind of PS diffuser plate production method, production method comprises the steps:
Prepare this material step: select PS plastic grain as this material;
Make optics master batch step: choose 100 parts of these material by weight from this material prepared, choose 5 ~ 9 parts of powder mixtures again, drop into after this material chosen and the mixing of powder mixture uniform stirring in dual-screw pelletizer, make gross weight than the optics master batch for 105-109 part; Powder mixture comprises diffusant, uv-resistant agent, oxygenant, photostabilizer and lubrication dispersing agent;
Extrusion moulding step: choose 100 parts of these material by weight from this material prepared, choose 1 ~ 25 part and make the optics master batch made in optics master batch step, choose 1-25 part HIPS, choose 1-9 part PMMA plastic grain, PO plastic grains, PP plastic grain, one or more mixture in PE plastic grain and MS plastic grain, this material selected, optics master batch, HIPS and PMMA plastic grain, PO plastic grains, PP plastic grain, one or more mixture in PE plastic grain and MS plastic grain is uniformly mixed in rear input extrusion shaping machine, PS diffuser plate sheet material is molded by extrusion shaping machine.
The present invention adds PMMA plastic grain in extrusion moulding step, PO plastic grains, PP plastic grain, one or more mixture in PE plastic grain and MS plastic grain, there is following beneficial effect like this: due in making optics master batch step, the each weight ratio of constituents contained inside produced optics master batch is fixed, like this, reach good effect to make the transmittance of PS diffuser plate or make the PS diffuser plate with a certain transmittance according to the demand of client, only need to change PMMA plastic grain in extrusion moulding step, PO plastic grains, PP plastic grain, the interpolation weight ratio of one or more the mixture in PE plastic grain and MS plastic grain, ratio better controls, thus be more conducive to controlling shaping after the transmittance of diffuser plate, in addition, after producing optics master batch, by to this material chosen, optics master batch, HIPS and PMMA plastic grain, PO plastic grains, PP plastic grain, the extrusion molding of one or more these compositions of mixture in PE plastic grain and MS plastic grain, be equivalent to the secondary dilution to this material ratio, better can change the shortcoming that diffuser plate becomes fragile, optimize the toughness of diffuser plate, finally can also make shaping after PS diffuser plate in, mixture layer can be attached to the upper and lower surface of PS main body flaggy.
Preferably, PS diffuser plate production method also comprises: cooling cutting step: after extrusion moulding step, by extrusion line naturally cooling PS diffuser plate sheet material, make PS diffuser plate sheet material smooth, and shaping PS diffuser plate sheet material is cut into the PS diffuser plate finished product of the economical size adapted with LED flat lamp or direct type LED television.
Further, make in optics master batch step, the prilling temperature in dual-screw pelletizer is between 160 degree to 220 degree, and granulation pressure is between 4.5Mpa to 13.5Mpa.
Further, in extrusion moulding step, the plate forming temperature in extrusion shaping machine is between 170 degree to 230 degree, and plate forming pressure is between 4.5Mpa to 13.5Mpa.
Further, make in optics master batch step, powder mixture also comprises white dyes.
The present invention changes the optical property of diffuser plate from diffuser plate inside, by adding one or more the mixture in PMMA plastic grain, PO plastic grains, PP plastic grain, PE plastic grain and MS plastic grain in extrusion moulding step, allow shaping after the PS diffuser plate inside chemical polymerization thing with different refractivity be dispersed in the upper and lower surface of main body flaggy, make it have fabulous optical obscurations lamp shadow performance, blooming piece or LED flat lamp quantity can be reduced, reach backlight module demand and sample effect on an equal basis.
According to a second aspect of the invention, the invention provides a kind of PS diffuser plate adopting any one production method above-mentioned to make, PS diffuser plate comprises: main body flaggy and mixture layer; Mixture layer is attached to upper surface and/or the lower surface of main body flaggy; The material of main body flaggy is PS; The material of mixture layer is one or more the mixture in PMMA, PO, PP, PE and MS; In main body flaggy and mixture layer, also infiltration has optics master batch.
Preferably, the outside surface of mixture layer is also distributed with the optical grains of the young line of worm.
Further, the density of main body flaggy is 1.04 ~ 1.06g/cm
3.
Further, the density of mixture layer is 0.92 ~ 0.95g/cm
3.
The upper surface of main body flaggy of the present invention and/or lower surface are attached with the mixture layer of one or more the mixture comprised in PMMA, PO, PP, PE and MS, have fabulous optical obscurations lamp shadow performance.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of diffuser plate production method in the embodiment of the present invention one;
Fig. 2 is the structural representation of diffuser plate in the embodiment of the present invention two.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
The English full name corresponding to english abbreviation involved in the present invention and Chinese as follows:
LED: English full name: Light Emitting Diode; Chinese: photodiode;
PS: English full name: Polystyrene; Chinese: polystyrene;
UV: English full name: Ultraviolet Rays; Chinese: ultraviolet;
HIPS: English full name: High impact polystyrene; Chinese: High Impact Polystyrene (HIPS) or high impact polystyrene or modified polystyrene;
PMMA: English full name: Polymethyl Methacrylate; Chinese: polymethylmethacrylate;
PO: English full name: PLOY; Chinese: polyolefins;
PP: English full name: Polypropylene; Chinese: polypropylene;
PE: English full name: Polyethylene; Chinese: polyethylene;
MS: English full name: methyl methacrylate-styrene copolymer; Chinese: copolymer of methyl methacrylatestyrene;
embodiment one
Please refer to Fig. 1, the present embodiment provides a kind of PS diffuser plate production method.PS diffuser plate production method comprises the steps:
Prepare this material step: select PS plastic grain as this material;
Make optics master batch step: choose 100 parts of these material by weight from this material prepared, choose 5 ~ 9 parts of powder mixtures again, drop into after this material chosen and the mixing of powder mixture uniform stirring in dual-screw pelletizer, make gross weight than the optics master batch for 105-109 part; Powder mixture comprises diffusant, uv-resistant agent, oxygenant, photostabilizer and lubrication dispersing agent;
Extrusion moulding step: choose 100 parts of these material by weight from this material prepared, choose 1 ~ 25 part and make the optics master batch made in optics master batch step, choose 1-25 part HIPS, choose 1-9 part PMMA plastic grain, PO plastic grains, PP plastic grain, one or more mixture in PE plastic grain and MS plastic grain, this material selected, optics master batch, HIPS and PMMA plastic grain, PO plastic grains, PP plastic grain, one or more mixture in PE plastic grain and MS plastic grain is uniformly mixed in rear input extrusion shaping machine, PS diffuser plate sheet material is molded by extrusion shaping machine.Be provided with in the exit of extrusion shaping machine and there is traction sheet material move ahead and with the running roller of the young line lines of worm, after molding PS diffuser plate sheet material, running roller rotates, and also suppresses the optical grains of the young line of worm in the process affecting sheet material to move at the outside surface of PS diffuser plate.
Preferably, PS diffuser plate production method also comprises: cooling cutting step: after extrusion moulding step, by extrusion line naturally cooling PS diffuser plate sheet material, make PS diffuser plate sheet material smooth, and shaping PS diffuser plate sheet material is cut into the PS diffuser plate finished product of the economical size adapted with LED flat lamp or direct type LED television.
Make in optics master batch step, the prilling temperature in dual-screw pelletizer is between 160 degree to 220 degree, and granulation pressure is between 4.5Mpa to 13.5Mpa.
In extrusion moulding step, the plate forming temperature in extrusion shaping machine is between 170 degree to 230 degree, and plate forming pressure is between 4.5Mpa to 13.5Mpa.
In the present embodiment, in making optics master batch step, by the granulation of dual-screw pelletizer, diffusant is dispersed in PS plastic grain, thus light is reflected through PS diffuser plate sheet material, reflects and the effect of scattering, in addition, also add uv-resistant agent, oxygenant, photostabilizer and lubrication dispersing agent, by increasing uv-resistant agent, the optical property of diffuser plate can be optimized, improving uv-resistance; By increasing photostabilizer and oxygenant, make diffuser plate optical property more stable, and lubrication dispersing agent assist powder mixture mixing more even.
In the present embodiment, in extrusion moulding step, one or more mixture in 1-9 part PMMA plastic grain, PO plastic grains, PP plastic grain, PE plastic grain and MS plastic grain and this material can be chosen as required, optics master batch, HIPS extrusion are shaping, the mixture ratio of the PMMA plastic grain added, PO plastic grains, PP plastic grain, PE plastic grain and MS plastic grain better controls, thus be more conducive to controlling shaping after the mist degree of diffuser plate and transmittance.
In the production process of diffuser plate, the production process of manufacturer's monitoring diffuser plate, be actually the transmittance of constantly test diffuser plate sheet material, normal PS diffuser plate sheet material transmittance manufactured by conventional production methods generally can only reach 55%-65%, have by adding diffusant in making optics master batch step, the transmittance of diffuser plate also can only reach 50%, want that reaching transmittance less than 50% is very difficulty, only have by constantly increasing optics master batch addition, and the increase of optics master batch addition causes PS diffuser plate secondary material ratio to increase, not optimization to the quality of PS diffuser plate sheet material and the production cost of producer, the transmittance of the PS diffuser plate sheet material produced by production method of the present invention is 55%, 50%, 45%, 40%, 35% etc.In addition, by adding HIPS, the toughness of the diffuser plate after better improvement is shaping.
Add one or more the mixture in PMMA plastic grain, PO plastic grains, PP plastic grain, PE plastic grain and MS plastic grain in extrusion moulding step, have following beneficial effect:
1. in PS diffuser plate, the factor affecting PS diffuser plate transmittance mainly contains two, one or more mixtures formed in the PMMA plastic grain of diffusant and interpolation, PO plastic grains, PP plastic grain, PE plastic grain and MS plastic grain, for diffusant, overstepping the bounds of propriety loose better in PS diffuser plate, and ensure dispersed as far as possible; For one or more the mixture in PMMA plastic grain, PO plastic grains, PP plastic grain, PE plastic grain and MS plastic grain, their extrusion moldings should be attached to upper surface and/or the lower surface of the main body flaggy of PS diffuser plate as far as possible after forming mixture layer, such light source through diffusant dispersed after, also can there is twice dispersing after mixture layer.
Make in optics master batch step, utilize dual-screw pelletizer granulation, this material is made to mix with powder mixture and become molten state, diffusant is also uniformly dispersed thereupon, if but PMMA plastic grain is added in making optics master batch step, PO plastic grains, PP plastic grain, one or more mixture in PE plastic grain and MS plastic grain, after the granulation of dual-screw pelletizer, PMMA plastic grain, PO plastic grains, PP plastic grain, PE plastic grain or MS plastic grain and diffusant dispersing and mixing are together, become mixing and dispersion molten state, like this, just the upper surface and/or the such position relationship of lower surface that realize mixture layer attachment main body flaggy is again difficult to when extrusion moulding step, this is mainly because the homogeneously dispersed state required for diffusant and mixture layer need to concentrate both the upper and lower surfaces itself being attached to main body flaggy conflicting.
Diffusant is in homogeneously dispersed state after making optics master batch step, in extrusion moulding step, add PMMA plastic grain again, PO plastic grains, PP plastic grain, one or more mixture in PE plastic grain and MS plastic grain, due to PMMA plastic grain, PO plastic grains, PP plastic grain, the fusing point of PE plastic grain and MS plastic grain relative to diffusant and PS plastic grain etc. fusing point much lower, to diffusant in extrusion shaping machine, PS plastic grain and PMMA plastic grain, PO plastic grains, PP plastic grain, during one or more mixture heating and pressurizing in PE plastic grain and MS plastic grain, after they all become molten state, by PMMA plastic grain after PS diffusing plate molding, PO plastic grains, PP plastic grain, the mixture layer that one or more mixture in PE plastic grain and MS plastic grain is formed just can be good at upper surface and/or the lower surface of the main body flaggy be attached to containing diffusant,
2. add PMMA plastic grain in extrusion moulding step, PO plastic grains, PP plastic grain, one or more mixture in PE plastic grain and MS plastic grain, due in making optics master batch step, the each weight ratio of constituents contained inside produced optics master batch is fixed, like this, when reaching good effect to make the transmittance of PS diffuser plate or according to the demand making of client, there is the PS diffuser plate of a certain transmittance, only need to change PMMA plastic grain in extrusion moulding step, PO plastic grains, PP plastic grain, the interpolation weight ratio of one or more the mixture in PE plastic grain and MS plastic grain, ratio better controls, thus be more conducive to controlling shaping after the transmittance of diffuser plate, and PMMA plastic grain is added in making optics master batch step, PO plastic grains, PP plastic grain, during one or more mixture in PE plastic grain and MS plastic grain, control PS diffuser plate transmittance, the PMMA plastic grain that must change each components by weight in optics master batch simultaneously and add, PO plastic grains, PP plastic grain, the weight ratio of one or more the mixture in PE plastic grain and MS plastic grain, the two is made to reach a suitable weight ratio, when existence two kinds of variablees, the more difficult realization of ratio control.
3. after producing optics master batch, by the extrusion molding of these compositions of mixture to one or more in this material chosen, optics master batch, HIPS and PMMA plastic grain, PO plastic grains, PP plastic grain, PE plastic grain and MS plastic grain, be equivalent to the secondary dilution to this material, better can change the shortcoming that diffuser plate becomes fragile, optimize the toughness of diffuser plate.
embodiment two
Please refer to Fig. 2, the present embodiment provides a kind of PS diffuser plate adopting the production method in embodiment one to make, and PS diffuser plate can be applied to as in straight-down negative LED TV and LED flat lamp etc.
Diffuser plate comprises: main body flaggy 1 and mixture layer 2; Mixture layer 2 is attached to upper surface and/or the lower surface of main body flaggy 1; The material of main body flaggy 1 is PS; The material of mixture layer 2 is one or more the mixture in PMMA, PO, PP, PE and MS; In main body flaggy 1 and mixture layer 2, also infiltration has optics master batch 3.Wherein, main body flaggy 1 and mixture layer 2 form integrative-structure through extrusion moulding.
As preferred version further, the outside surface of mixture layer is also distributed with the optical grains of the young line 4 of worm, specifically can when extrusion molding by the optical grains of the young line 4 of running roller compacting worm; The density of main body flaggy is 1.04 ~ 1.06g/cm
3; The density of mixture layer is 0.92 ~ 0.95g/cm
3.More preferably, the density of main body flaggy is 1.05 g/cm
3, mixture layer density is 0.93/cm
3.
The young line of worm has the advantage that scratch resistant scratches, and foreign matter more anti-than frosted line is easy to clean.When extrusion molding, the young line of worm can utilize the textured running roller of surface band to suppress out.
Above content is in conjunction with concrete embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made.
Claims (9)
1. a PS diffuser plate production method, comprises the steps:
Prepare this material step: select PS plastic grain as this material;
Make optics master batch step: choose 100 parts of these material by weight from this material prepared, choose 5 ~ 9 parts of powder mixtures again, drop into after this material chosen and the mixing of powder mixture uniform stirring in dual-screw pelletizer, make gross weight than the optics master batch for 105-109 part; Described powder mixture comprises diffusant, uv-resistant agent, oxygenant, photostabilizer and lubrication dispersing agent;
Extrusion moulding step: choose 100 parts of these material by weight from this material prepared, choose the optics master batch made in 1 ~ 25 part of described making optics master batch step, choose 1-25 part HIPS, choose 1-9 part PMMA plastic grain, PO plastic grains, PP plastic grain, one or more mixture in PE plastic grain and MS plastic grain, described the material selected, optics master batch, HIPS and PMMA plastic grain, PO plastic grains, PP plastic grain, one or more mixture in PE plastic grain and MS plastic grain is uniformly mixed in rear input extrusion shaping machine, PS diffuser plate sheet material is molded by extrusion shaping machine.
2. diffuser plate production method according to claim 1, is characterized in that: also comprise:
Cooling cutting step: after described extrusion moulding step, by PS diffuser plate sheet material described in extrusion line naturally cooling, make described PS diffuser plate sheet material smooth, and shaping described PS diffuser plate sheet material is cut into the PS diffuser plate finished product of the economical size adapted with LED flat lamp or direct type LED television.
3. diffuser plate production method according to claim 1 and 2, is characterized in that: in described making optics master batch step, the prilling temperature in described dual-screw pelletizer is between 160 degree to 220 degree, and granulation pressure is between 4.5Mpa to 13.5Mpa.
4. diffuser plate production method according to claim 1 and 2, is characterized in that: in described extrusion moulding step, and the plate forming temperature in described extrusion shaping machine is between 170 degree to 230 degree, and plate forming pressure is between 4.5Mpa to 13.5Mpa.
5. diffuser plate production method according to claim 1 and 2, is characterized in that: in described making optics master batch step, described powder mixture also comprises white dyes.
6. adopt as arbitrary in claim 1 ~ 5 as described in the PS diffuser plate made of production method, it is characterized in that, comprising: main body flaggy (1) and mixture layer (2); Described mixture layer (2) is attached to upper surface and/or the lower surface of described main body flaggy (1); The material of described main body flaggy is PS; The material of described mixture layer (2) is one or more the mixture in PMMA, PO, PP, PE and MS; In described main body flaggy (1) and described mixture layer (2), also infiltration has optics master batch (3).
7. PS diffuser plate according to claim 6, is characterized in that: the outside surface of described mixture layer (2) is also distributed with the optical grains of the young line (4) of worm.
8. the PS diffuser plate according to claim 6 or 7, is characterized in that: the density of described main body flaggy (1) is 1.04 ~ 1.06g/cm
3.
9. the diffuser plate according to claim 6 or 7, is characterized in that: the density of described mixture layer (2) is 0.92 ~ 0.95g/cm
3.
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