CN106908883B - A kind of small-medium size reflectance coating and preparation method thereof - Google Patents

A kind of small-medium size reflectance coating and preparation method thereof Download PDF

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Publication number
CN106908883B
CN106908883B CN201610977729.3A CN201610977729A CN106908883B CN 106908883 B CN106908883 B CN 106908883B CN 201610977729 A CN201610977729 A CN 201610977729A CN 106908883 B CN106908883 B CN 106908883B
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reflectance coating
layers
thickness
backlight module
agent
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CN106908883A (en
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金亚东
张园园
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Ningbo Solartron Technology Co Ltd
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Ningbo Solartron Technology Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
    • G02B5/0825—Multilayer mirrors, i.e. having two or more reflecting layers the reflecting layers comprising dielectric materials only
    • G02B5/0841—Multilayer mirrors, i.e. having two or more reflecting layers the reflecting layers comprising dielectric materials only comprising organic materials, e.g. polymers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The present invention relates to optical thin films, and in particular to a kind of reflectance coating, in particular to a kind of reflectance coating and preparation method thereof applied in small-medium size backlight.To scratch the brightness that light guide plate and reflectance coating are assembled into backlight module lower in order to overcome the problems, such as reflectance coating to be in the prior art applied to reflectance coating in small-medium size backlight module, and the present invention provides a kind of reflectance coating and preparation method thereof.The reflectance coating includes the three-layer co-extruded structure of ABA；Described B layers includes following component: polyester: 71-94%, inorganic particulate: 3-15%, organic foaming agent: 1-7%, polyethylene glycol: 1-2%, antistatic agent: 1-5%；Described A layers includes following component: polyester: 90-97%, opening agent: 3-10%；The percentage composition is weight percentage.Compared with prior art, reflection membrane preparation method simple process provided by the invention, it is easily operated, while the thickness of entire backlight module is reduced, save cost.

Description

A kind of small-medium size reflectance coating and preparation method thereof
Technical field
The present invention relates to optical thin films, and in particular to a kind of reflectance coating, in particular to it is a kind of to be applied to small-medium size backlight Reflectance coating in source and preparation method thereof.
Background technique
In recent years, reflectance coating is applied in the fields such as liquid crystal display panel, solar energy backboard film, vehicle-carrying display screen, application Widely.It is higher that reflectance coating applies the requirement in small-medium size backlight more to come, reflectance coating as composition backlight module one A important component plays vital work to the taste (improving the quality of picture) for improving mould group and the brightness for improving mould group With.
The film surface roughness of common reflectance coating is big in the market, such as reflectance coating used in comparative example 1, because of small-medium size The special designing of backlight module, often will cause reflectance coating scratch light guide plate and reflectance coating is assembled into after lighting in backlight module and makes At the luminance shortage of mould group.
Being applied to the reflectance coating in small-medium size backlight currently on the market is silvered reflective film and coating reflectance coating, but is plated Silver-colored reflectance coating and coating reflectance coating price are high, and complex process, increasing production cost reduces production efficiency, and causes money The waste in source.
Summary of the invention
In order to overcome in the prior art reflectance coating be applied to reflectance coating in small-medium size backlight module and scratch light guide plate and anti- Penetrate the lower problem of brightness that film is assembled into backlight module, the present invention provides a kind of reflectance coating and preparation method thereof.It is described anti- Film is penetrated using the raw material selection of optimization and proportion, reduces the surface roughness of reflectance coating to avoid reflectance coating from scraping light guide plate Wound, improves the brightness that entire reflectance coating is assembled into backlight module.
In order to solve the above technical problem, the present invention provides following technical proposals:
The present invention provides a kind of reflectance coating, which includes the three-layer co-extruded structure of ABA；Described B layers includes following component: Polyester: 71-94%, inorganic particulate: 3-15%, organic foaming agent: 1-7%, polyethylene glycol: 1-2%, antistatic agent: 1-5%； Described A layers includes following component: polyester: 90-97%, opening agent: 3-10%；The percentage composition is weight percentage.
Further, the described B layers sandwich layer for reflectance coating.The surface layer for reflectance coating described A layers.
Further, gained reflectance coating is with a thickness of 100 μm.
Further, in the reflectance coating, two A layers of thickness in total account for the 2-20% of entire reflection film thickness, B thickness Degree accounts for the 80-98% of entire reflection film thickness.
Further, in the reflectance coating, 8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflection The 84% of film overall thickness.
Further, the polyethylene glycol is used as dispersing agent.
Further, the reflectance coating is applied to the reflectance coating in small-medium size backlight.
Further, in the reflectance coating, A layers of opening agent is silicon dioxide granule.
Further, the partial size of opening agent is 0.1-4 μm.
Further, in the reflectance coating, A layers and B layers of polyester is polyethylene terephthalate (PET), poly- couple One of benzene dicarboxylic acid butanediol ester (PBT) or polyethylene naphthalate (PEN).
Further, in the reflectance coating, B layers of inorganic particulate is TiO 2 particles, silicon dioxide granule, barium sulfate One of particle.
Further, the partial size of B layers of inorganic particulate is 0.1-5 μm.
Further, in the reflectance coating, B layers of organic foaming agent is poly(4-methyl-1-pentene), cyclic olefin copolymerization tree One of rouge.
Further, in the reflectance coating, B layers of antistatic agent is ethoxylated alkylamine.
Further, A layers of the material includes polyester 92-96%, opening agent 4-8%；B layers of the material includes The polyester of 80-86%, 7-12% inorganic particulate, the organic foaming agent of 3-5%, 1-2% polyethylene glycol, 2-4% antistatic agent.This Preferred formula corresponds to embodiment 3-4 and 7-9.
Further, A layers of the material includes PET slice 92-96%, silicon dioxide granule 4-8%；Described B layers Material includes the PET slice of 80-86%, 7-12% barium sulfate or titanium oxide inorganic particle, the polymethylpentene or ring of 3-5% Shape olefin-copolymerization resin, 1-2% polyethylene glycol, 2-4% ethoxylated alkylamine antistatic agent.
Further, in the reflectance coating, A layers of opening agent is silicon dioxide granule.Further, the partial size of opening agent It is 0.1-4 μm.
Further, in the reflectance coating, A layers of the material includes polyester 94-96%, opening agent 4-6%；The B The material of layer includes the polyester of 81-86%, 7-10% inorganic particulate, the organic foaming agent of 4-5%, 1-2% polyethylene glycol, 2- 4% antistatic agent.This, which is preferably formulated, corresponds to embodiment 3-4 and 8-9.
The reflectance coating, A layers of proportion are that 96%PET is sliced, 4% silicon dioxide granule.B layers of proportion are that 82%PET is sliced, 8%TiO2, 5% poly(4-methyl-1-pentene), 1% polyethylene glycol, 4% ethoxylated alkylamine antistatic agent, the percentage is Weight percent.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for the 84% of reflectance coating overall thickness.Gained Reflectance coating is with a thickness of 100 μm.This, which is preferably formulated, corresponds to embodiment 9.
Further, the present invention also provides a kind of preparation method of reflectance coating, which includes the following steps:
(1) main extruder is added after being uniformly mixed according to a ratio B layers of raw material, A layers of raw material is uniformly mixed according to a ratio Auxiliary extruder is added；Main extruder and auxiliary extruder are heated, melting extrusion, curtain coating slab；
(2) slab is subjected to longitudinal stretching, cross directional stretch, thermal finalization, cooling, traction, winding, required reflection is made Film.
Reflection membrane preparation method simple process provided by the invention, it is easily operated.
Reflectance coating provided by the invention is applied to be solved in 32 cun of backlight modules below, the especially backlight module of small size Reflectance coating of having determined scratches the problem of light guide plate, and then solves the problems, such as occur white after backlight module is lighted.
Further, the described 32 cun sizes for backlight module.
Further, refer to the cornerwise length of backlight module for described 32 cun.
Further, the backlight module of the small size refers to 19 cun of backlight modules below.
The present invention reduces the surface roughness of reflectance coating, to keep away by the additive amount of reduction reflectance coating surface opening agent Scratch of the reflectance coating to light guide plate is exempted from；Reasonably combined by middle layer foaming agent and inorganic particulate improves entire reflectance coating The brightness being assembled into backlight module.Reflectance coating provided by the invention meets mould group demanding for small-medium size in the market Demand.
Further, the reflectance coating is applied solves in 32 cun of backlight modules below especially backlight module of small size The problem of rear luminance shortage is lighted in slim reflectance coating assembling of having determined, and then reduce bright enhancement film and diffusion barrier in entire backlight module Quantity, reduce the thickness of entire backlight module, saved cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of reflectance coating provided by the invention.
Description of symbols:
1: surface layer (A layers)；2: sandwich layer (B layers)；3: inorganic particulate；4: abscess；5: opening agent.
Specific embodiment
With reference to embodiment and Figure of description, invention is further described in detail.
As shown in Figure 1, the present invention provides a kind of reflectance coating, the reflectance coating has the three-layer co-extruded structure of ABA, reflection Film includes sandwich layer (B layers) 2 and surface layer (A layers) 1, the uniform abscess 4 and inorganic particulate formed in sandwich layer 2 with organic foaming agent The 3 uniform abscesses formed through biaxial tension, opening agent 5 is all added in surface layer 1.
The test method of the main performance of reflectance coating provided by the invention is summarized as follows:
The test method of brightness (i.e. luminance): being assembled into backlight module for reflectance coating, and the light-emitting surface of backlight module is divided into 5 × 5 25 areas, light backlight module, are measured using Fu Shida BM-7A brightness photometer, measurement angle be 1 °, brightness photometer with The distance of backlight single side light-emitting surface is 50cm, measures the luminance of 25 points in backlight module single side light-emitting surface, acquires 25 points Luminance brightness of the arithmetic mean of instantaneous value as reflectance coating.
The test method of surface roughness: it with the stylus inside Japan's Mitutoyo SJ-210 roughmeter and is tested Body surface is in contact, and stylus is made gently to slip over measurement surface roughness Ra (the i.e. arithmetic average of profile along testee surface Deviation), measuring speed 0.5mm/s, the sampling cut-off wavelength of filter is 0.08mm.
The test method of reflectance coating scratch light guide plate: reflectance coating falling sphere experiment: is assembled into backlight module, backlight module point At 9 regions, it is respectively perpendicular and is pounded in 9 regions of backlight module from the place of 16cm height with the acrylic sphere of 64g, lighted Whether backlight module, visually observing has white group on light guide plate in backlight module, if there is white group to illustrate that reflectance coating scratches light guide plate, phase It is anti-then reflectance coating does not scratch light guide plate.
Embodiment 1
Reflectance coating provided by the invention, A layers of proportion are that 90%PET is sliced, 10% silicon dioxide granule.B layers of proportion are 71%PET slice, 15%BaSO4, 7% cyclic olefin copolymer resins, 2% polyethylene glycol, 5% ethoxylated alkylamine is antistatic Agent, the percentage are weight percentage.It is total that 8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating The 84% of thickness.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Embodiment 2
Reflectance coating provided by the invention, A layers of proportion are that 92%PET is sliced, 8% silicon dioxide granule.B layers of proportion are 76% PET slice, 12%SiO2, 6% cyclic olefin copolymer resins, 2% polyethylene glycol, 4% ethoxylated alkylamine antistatic agent, institute Percentage is stated to be weight percentage.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating overall thickness 84%.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Embodiment 3
Reflectance coating provided by the invention, A layers of proportion are that 94%PET is sliced, 6% silicon dioxide granule.B layers of proportion are 81% PET slice, 10%TiO2, 5% cyclic olefin copolymer resins, 1% polyethylene glycol, 3% ethoxylated alkylamine antistatic agent, institute Percentage is stated to be weight percentage.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating overall thickness 84%.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Embodiment 4
Reflectance coating provided by the invention, A layers of proportion are that 96%PET is sliced, 4% silicon dioxide granule.B layers of proportion are 86% PET slice, 7%BaSO4, 4% poly(4-methyl-1-pentene), 1% polyethylene glycol, 2% ethoxylated alkylamine antistatic agent, institute Percentage is stated to be weight percentage.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating overall thickness 84%.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Embodiment 5
Reflectance coating provided by the invention, A layers of proportion are that 97%PET is sliced, 3% silicon dioxide granule.B layers of proportion are 91% PET slice, 4%BaSO4, 3% cyclic olefin copolymer resins, 1% polyethylene glycol, 1% ethoxylated alkylamine antistatic agent, institute Percentage is stated to be weight percentage.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating overall thickness 84%.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Embodiment 6
Reflectance coating provided by the invention, A layers of proportion are that 90%PET is sliced, 10% silicon dioxide granule.B layers of proportion are 94%PET slice, 3%TiO2, 1% poly(4-methyl-1-pentene), 1% polyethylene glycol, 1% ethoxylated alkylamine antistatic agent, The percentage is weight percentage.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating overall thickness 84%.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Embodiment 7
Reflectance coating provided by the invention, A layers of proportion are that 92%PET is sliced, 8% silicon dioxide granule.B layers of proportion are 80% PET slice, 12%BaSO4, 3% cyclic olefin copolymer resins, 2% polyethylene glycol, 3% ethoxylated alkylamine antistatic agent, The percentage is weight percentage.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating overall thickness 84%.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Embodiment 8
Reflectance coating provided by the invention, A layers of proportion are that 94%PET is sliced, 6% silicon dioxide granule.B layers of proportion are 81% PET slice, 10%TiO2, 4% poly(4-methyl-1-pentene), 2% polyethylene glycol, 3% ethoxylated alkylamine antistatic agent, institute Percentage is stated to be weight percentage.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating overall thickness 84%.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Embodiment 9
Reflectance coating provided by the invention, A layers of proportion are that 96%PET is sliced, 4% silicon dioxide granule.B layers of proportion are 82% PET slice, 8%TiO2, 5% poly(4-methyl-1-pentene), 1% polyethylene glycol, 4% ethoxylated alkylamine antistatic agent is described Percentage is weight percentage.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating overall thickness 84%.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Embodiment 10
Reflectance coating provided by the invention, A layers of proportion are that 97%PET is sliced, 3% silicon dioxide granule.B layers of proportion are 77% PET slice, 14%SiO2, 6% cyclic olefin copolymer resins, 1% polyethylene glycol, 2% ethoxylated alkylamine antistatic agent, institute Percentage is stated to be weight percentage.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating overall thickness 84%.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Embodiment 11
Reflectance coating provided by the invention, A layers of proportion are that 90%PET is sliced, 10% silicon dioxide granule.B layers of proportion are 85%PET slice, 6%BaSO4, 2% cyclic olefin copolymer resins, 2% polyethylene glycol, 5% ethoxylated alkylamine is antistatic Agent, the percentage are weight percentage.It is total that 8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating The 84% of thickness.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
Reference examples 1
A kind of reflectance coating is provided, A layers of proportion are that 88%PET is sliced, 12% silicon dioxide granule.B layers of proportion are 91%PET Slice, 2%TiO2, 1% cyclic olefin copolymer resins, 2% polyethylene glycol, 4% ethoxylated alkylamine antistatic agent, described hundred Ratio is divided to be weight percentage.8%, the B thickness degree that one A layers of thickness accounts for reflectance coating overall thickness accounts for reflectance coating overall thickness 84%.For gained reflectance coating with a thickness of 100 μm, correlated performance is shown in Table 2.
A layer, B layers of proportion in technical solution described in 1 embodiment 1-11 of table and reference examples 1
1 gained reflectance coating performance test table of 2 embodiment 1-11 of table and reference examples
The test result as shown in upper table it can be concluded that, reflectance coating provided by the invention is applied in small-medium size backlight module When, brightness (luminance) is all higher, and does not scratch in falling sphere experiment or only have slight scratch light guide plate, especially roughness Ra small When 0.093 μm, the variation of roughness Ra is on the performance of scratch light guide plate without influence.Particularly, obtained by embodiment 3-4,7-9 Reflectance coating average luminance (i.e. brightness) be greater than 4000cd/m2And light guide plate is not scratched, comprehensive performance is more preferable.Particularly, real The average luminance (i.e. brightness) for applying the obtained reflectance coating of 3-4,8-9 is greater than 4042cd/m2And light guide plate is not scratched, it is comprehensive It can be more preferable.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all The equivalent changes and modifications that content is done according to the present invention are encompassed by the scope of the patents of the invention.

Claims (7)

1. a kind of reflectance coating, which is characterized in that the reflectance coating includes the three-layer co-extruded structure of ABA；A layers of the material includes poly- Ester 94-96%, opening agent 4-6%；B layers of the material includes the polyester of 81-86%, and 7-10% inorganic particulate, 4-5%'s has Machine foaming agent, 1-2% polyethylene glycol, 2-4% antistatic agent；The percentage composition is weight percentage.
2. reflectance coating according to claim 1, which is characterized in that in the reflectance coating, A layers of opening agent is silica Particle.
3. reflectance coating according to claim 1, which is characterized in that in the reflectance coating, A layers and B layers of polyester is poly- pair In ethylene terephthalate (PET), polybutylene terephthalate (PBT) (PBT) or polyethylene naphthalate (PEN) It is a kind of.
4. reflectance coating according to claim 1, which is characterized in that in the reflectance coating, B layers of inorganic particulate is titanium dioxide One of titanium particle, silicon dioxide granule, barium sulfate particles.
5. reflectance coating according to claim 1, which is characterized in that in the reflectance coating, B layers of organic foaming agent is poly- 4- One of Methyl-1-pentene, cyclic olefin copolymer resins.
6. reflectance coating according to claim 1, which is characterized in that in the reflectance coating, B layers of antistatic agent is ethyoxyl Change alkylamine.
7. a kind of preparation method of reflectance coating described in claim 1, which is characterized in that the preparation method includes following step It is rapid:
(1) main extruder is added after being uniformly mixed according to a ratio B layers of raw material, A layers of raw material is uniformly mixed according to a ratio addition Auxiliary extruder；Main extruder and auxiliary extruder are heated, melting extrusion, curtain coating slab；
(2) slab is subjected to longitudinal stretching, cross directional stretch, thermal finalization, cooling, traction, winding, required reflectance coating is made.
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CN111993737A (en) * 2019-05-27 2020-11-27 宁波长阳科技股份有限公司 High-transmittance high-fog optical pre-coating film and preparation method thereof
CN112147727B (en) * 2020-08-19 2022-11-18 广州凌玮科技股份有限公司 Reflecting film with higher reflectivity

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