WO2022116647A1 - Film de réflexion optique - Google Patents

Film de réflexion optique Download PDF

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Publication number
WO2022116647A1
WO2022116647A1 PCT/CN2021/119271 CN2021119271W WO2022116647A1 WO 2022116647 A1 WO2022116647 A1 WO 2022116647A1 CN 2021119271 W CN2021119271 W CN 2021119271W WO 2022116647 A1 WO2022116647 A1 WO 2022116647A1
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WO
WIPO (PCT)
Prior art keywords
particles
layer
resin
reflective film
antistatic agent
Prior art date
Application number
PCT/CN2021/119271
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English (en)
Chinese (zh)
Inventor
罗培栋
白倩倩
张强
赵伯培
赵程
Original Assignee
宁波东旭成新材料科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 宁波东旭成新材料科技有限公司 filed Critical 宁波东旭成新材料科技有限公司
Priority to KR1020237007125A priority Critical patent/KR20230042119A/ko
Publication of WO2022116647A1 publication Critical patent/WO2022116647A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface
    • G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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

Definitions

  • the present application relates to an optical reflection film.
  • the liquid crystal display itself does not emit light.
  • the display function benefits from the light emitted by the modulated backlight source.
  • the performance index of the display depends on the performance of the backlight source. Therefore, the performance of the backlight module light source directly affects the quality of the liquid crystal display.
  • the reflective film is one of the most important optical films in the backlight module of the liquid crystal display. In the liquid crystal display, the reflective film is at the bottom of the backlight module of the light guide plate to reflect the light leaked from the light source back to the light guide plate, so that it can concentrate Front projection to prevent light leakage to increase the efficiency of light use.
  • the heat generated by the backlight module for a long time will cause thermal shrinkage and deformation of the reflective film.
  • the reflective film in the backlight module is usually fixed by gluing light-shielding glue on the edges of both sides, and the space above the reflective film is insufficient, resulting in reflection.
  • the film is prone to bad phenomena such as film arching, wrinkling, and delamination, which seriously affects the display effect.
  • the structure of the traditional backlight module does not consider the reliability of the design of the optical film. Therefore, the existing technology has shortcomings and needs to be improved.
  • the present application provides an optical reflective film, which has the characteristics of low thermal shrinkage and self-adhesion.
  • the present application provides an optical reflective film, which includes a first resin layer, a reflective film base layer, a second resin layer, a glue layer and a peeling layer arranged in sequence,
  • the first resin layer and the second resin layer include temperature-adjusting particles having a core-shell structure
  • the glue layer includes an antistatic agent and glue
  • the base layer of the reflective film includes a host resin, organic particles incompatible with the host resin, inorganic particles incompatible with the host resin, and holes, and the holes are located between the organic particles and the host resin, and the holes are located between the organic particles and the host resin. Between the inorganic particles and the host resin, the difference between the density of the organic particles and the density of the host resin is less than 0.25 g/cm 3 .
  • the first resin layer and the second resin layer include at least one of epoxy resin, acrylic resin or silicone.
  • the shell layer of the temperature-adjusting particles is at least one of SiO 2 , TiO 2 , ZnO or BaTiO 3
  • the core layer is at least one of paraffin, polyethylene glycol or butyl stearate.
  • the antistatic agent is at least one of antistatic agent SN, antistatic agent TM, antistatic agent SP or antistatic agent SH-105;
  • the glue is acrylic glue, organic silica gel water or polyurethane glue at least one of.
  • the difference between the surface tension of the organic particles and the surface tension of the host resin is greater than 20 dyn/cm.
  • the main resin is PET; the organic particles are PMMA particles surface-treated with PTFE, and the particle size of the PMMA particles is below 1 ⁇ m.
  • the weight percentage of the PMMA particles in the base layer of the reflective film is between 1% and 20%.
  • the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is 0.1 ⁇ m-0.5 ⁇ m, and the weight percentage of the titanium dioxide particles in the reflective film base layer is between 1% and 15%.
  • the reflective film is coated with a resin layer containing temperature-adjusting particles on both sides, and by absorbing/releasing heat, the film layer maintains a stable and suitable working temperature, and prevents the reflective film from shrinking and deforming due to changes in ambient temperature.
  • the reflective film after removing the peeling film can be directly bonded to the backlight module, avoiding the problems of arching, wrinkling and delamination of the optical reflective film due to the large thermal shrinkage caused by the traditional light-shielding glue fixing method, and can be used for different sizes. in the optical module.
  • FIG. 1 is a schematic structural diagram of the present application.
  • an optical reflective film comprising: a first resin layer, a reflective film base layer, a second resin layer, a glue layer and a peeling layer arranged in sequence.
  • the first resin layer and the second resin layer include temperature-adjusting particles of core-shell structure.
  • the glue layer includes an antistatic agent and glue.
  • the reflective film base layer includes a host resin, organic particles incompatible with the host resin, inorganic particles incompatible with the host resin, and pores. The pores are located between the organic particles and the host resin, and between the inorganic particles and the host resin. The difference between the density of the organic particles and the density of the host resin is less than 0.25 g/cm 3 .
  • the temperature-adjusting particles provided in the first resin layer and the second resin layer can absorb/release heat.
  • the optical reflective film can be kept in a stable and suitable temperature range for operation, thereby preventing the reflective film from shrinking and deforming due to changes in ambient temperature.
  • the optical reflective film of the present application can be directly attached to the backlight module through the glue layer, which avoids that the optical reflective film is prone to arching, wrinkles, delamination, etc. Bad phenomenon, suitable for optical modules of different sizes.
  • the first resin layer and the second resin layer include at least one of epoxy, acrylic, or silicone. In some embodiments, the first resin layer and the second resin layer include acrylic resin.
  • the shell layer of the temperature-adjusting particles is at least one of SiO 2 , TiO 2 , ZnO or BaTiO 3
  • the core layer is at least one of paraffin, polyethylene glycol or butyl stearate.
  • the melting point of paraffin is 55°C-60°C.
  • the melting point of polyethylene glycol (PEG) is also different.
  • PEG polyethylene glycol
  • polyethylene glycol with a molecular weight of about 4000 is used, and its melting point is 75°C-80°C.
  • the melting point of butyl stearate is about 30°C.
  • the working temperature of the display is about 60°C.
  • at least one of paraffin, polyethylene glycol and butyl stearate may be used as the core layer of the temperature-adjusting particles according to the working temperature of the display.
  • the temperature of the display rises and reaches near the melting temperature of the core layer material, and the core layer material melts and absorbs heat, which helps to reduce the temperature of the optical reflective film.
  • the type of core layer material and the percentage of each type of core layer material can be adjusted according to the operating temperature of the optical reflective film.
  • the core layer material is paraffin.
  • Using at least one of SiO 2 , TiO 2 , ZnO and BaTiO 3 as the shell layer of the core-shell structure can protect the core layer of the temperature-adjusting particles. During the endothermic melting of the core layer, the shell layer can protect the melted core layer from leaking out.
  • Using at least one of SiO 2 , TiO 2 , ZnO and BaTiO 3 as the shell layer of the core-shell structure can also improve the dispersibility of the temperature-adjusting particles and make them more uniformly dispersed in the first resin layer and the second resin layer.
  • TiO2 is used as the core layer of the temperature modulating particles. TiO2 has a high refractive index, which can improve the reflectivity of optical reflective films in the wavelength range of 380nm-700nm.
  • the diameter of the temperature-adjusting particles is 1 ⁇ m-10 ⁇ m; optionally, it is 3 ⁇ m-5 ⁇ m.
  • the particle size of the temperature-adjusting particles is small, the temperature-adjusting particles are easy to agglomerate and are not easily dispersed in the first resin layer and the second resin layer; Settling in the resin layer, the stability of the product is poor.
  • the antistatic agent is at least one of antistatic agent SN, antistatic agent TM, antistatic agent SP or antistatic agent SH-105;
  • the glue is acrylic glue, silicone water or polyurethane At least one of the glues.
  • Adding an antistatic agent to the glue layer can help to eliminate the harm of harmful charges. On the one hand, it can prevent the adsorption of foreign objects during the assembly of the backlight module, so that the optical reflective film can be more smoothly attached to the backlight module; It can eliminate the breakdown of electrical components caused by electrostatic discharge and affect the use of optical reflective films.
  • the difference between the surface tension of the organic particles and the surface tension of the host resin is greater than 20 dyn/cm; preferably, between 20 dyn/cm and 30 dyn/cm.
  • the difference between the surface tension of the organic particles and the surface tension of the host resin is in the range of 20dyn/cm-30dyn/cm, when the base layer of the reaction film is stretched by an external force, because the surface tensions of the organic particles and the host resin are different, the create holes. If the surface tension of the organic particles and the host resin is too large, it may reduce the strength of the optical reflective film and affect the formation of the optical reflective film; when the surface tension difference between the organic particles and the host resin is small, it is difficult to generate holes. Holes can increase the reflectivity of the optical reflective film.
  • the host resin is PET; the organic particles are PMMA particles surface-treated with PTFE, and the particle size of the PMMA particles is below 1 ⁇ m, optionally 0.3 ⁇ m to 0.5 ⁇ m.
  • PMMA and PET have high reflectivity in the visible light wavelength range (380nm-740nm), and the use of PET and PMMA helps to improve the reflectivity of optical reflective films.
  • the weight percentage of the PMMA particles in the base layer of the reflective film is between 1%-20%; optionally, it is 10%-15%.
  • the content of the PMMA particles is too high, it is not conducive to the formation of the optical reflection film; when the content of the PMMA particles is too low, it is not conducive to enhancing the reflectivity of the optical reflection film.
  • the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is 0.1 ⁇ m-0.5 ⁇ m, and the weight percentage of the titanium dioxide particles in the reflective film base layer is between 1% and 15%.
  • the release layer is a PET release film. In some embodiments, it is a PET light release film with a peel force of 5gf/inch-10gf/inch.
  • the release layer can act as a protective glue layer. In the process of use, the peeling layer can be removed, and the reflective film after removing the peeling film can be directly bonded to the backlight module, avoiding that the optical reflective film is prone to arching, wrinkling, separation due to the large thermal shrinkage caused by the traditional light-shielding glue fixing method. Layers and other undesirable phenomena can be used in optical modules of different sizes.
  • PET Polyethylene Terephthalate
  • PMMA Polymethyl Methacrylate
  • PVC Polyvinyl chloride
  • PTFE Poly Tetra Fluoroethylene
  • Antistatic agent TM is a quaternary ammonium salt type cationic surfactant, the main chemical component is methyl trihydroxyethyl ammonium methyl sulfate.
  • Antistatic agent SP is a quaternary ammonium salt type cationic surfactant, the main component is stearamidopropyl dimethyl ⁇ -hydroxyethyl ammonium dihydrogen phosphate.
  • Antistatic agent SH-105 is a yellowish viscous transparent liquid, belongs to quaternary ammonium salt cationic surfactant, its main chemical composition is methyl ammonium dodecyl hydroxypropyl dihydroxyethyl methyl sulfate.
  • Antistatic agent SN is a cationic surfactant, the main component is octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate.
  • the optical reflective film shown in FIG. 1 includes a first resin layer 2 , a reflective film base layer 1 , a second resin layer 7 , a glue layer 4 and a peeling layer 5 , which are arranged in sequence.
  • the first resin layer 2 and the second resin layer 7 include temperature-adjusting particles 3 of core-shell structure.
  • the glue layer 4 includes an antistatic agent and glue.
  • the reflective film base layer 1 includes a host resin, organic particles incompatible with the host resin, inorganic particles incompatible with the host resin, and holes 6 .
  • the holes 6 are located between the organic particles and the host resin, and between the inorganic particles and the host resin.
  • the difference between the density of the organic particles and the density of the host resin is less than 0.25 g/cm 3 .
  • the resin layer 2 is epoxy resin; the temperature-adjusting particles 3 of the core-shell structure have a shell layer of SiO 2 and a core layer of paraffin.
  • antistatic agent SN is used as antistatic agent, and acrylic glue is used as glue.
  • the peeling layer is a PET release film.
  • the main resin is PET;
  • the organic particles are PMMA particles surface-treated with PTFE, the particle size of the PMMA particles is below 1 ⁇ m, and the weight percentage of the PMMA particles in the base layer of the reflective film is 15%.
  • the inorganic particles are titanium dioxide particles
  • the particle size of the titanium dioxide particles is controlled between 0.1 ⁇ m and 0.5 ⁇ m
  • the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 10%.
  • the structure of the optical reflection film in this embodiment is the same as that of the first embodiment.
  • the resin layer 2 in this embodiment is acrylic resin; the temperature regulating particles 3 of the core-shell structure have a shell layer of TiO 2 and a core layer of polyethylene glycol.
  • antistatic agent TM is used as antistatic agent
  • organic silica gel water is used as glue.
  • the peeling layer is a PET release film.
  • the weight percentage of PMMA particles in the base layer of the reflective film is 5%.
  • the inorganic particles are titanium dioxide particles
  • the particle size of the titanium dioxide particles is controlled between 0.1 ⁇ m and 0.5 ⁇ m
  • the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 8%.
  • the structure of the optical reflection film in this embodiment is the same as that of the first embodiment.
  • the resin layer 2 in this embodiment is silicone;
  • the temperature regulating particles 3 of the core-shell structure have a shell layer of ZnO and a core layer of butyl stearate.
  • antistatic agent SP is used as antistatic agent
  • polyurethane glue is used as glue.
  • the peeling layer is a PET release film.
  • the weight percentage of PMMA particles in the base layer of the reflective film is 1%.
  • the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is controlled between 0.1 ⁇ m-0.5 ⁇ m, and the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 12%.
  • the structure of the optical reflection film in this embodiment is the same as that of the first embodiment.
  • the resin layer 2 in this embodiment is epoxy resin; the temperature regulating particles 3 of the core-shell structure have a shell layer of BaTiO 3 and a core layer of paraffin.
  • the antistatic agent adopts antistatic agent SN
  • the glue adopts polyurethane glue.
  • the peeling layer is a PET release film.
  • the weight percentage of PMMA particles in the base layer of the reflective film is 20%.
  • the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is controlled between 0.1 ⁇ m-0.5 ⁇ m, and the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 5%.
  • the structure of the optical reflection film in this embodiment is the same as that of the first embodiment.
  • the resin layer 2 in this embodiment is acrylic resin
  • the temperature regulating particles 3 of the core-shell structure have a shell layer of SiO 2 and a core layer of butyl stearate.
  • antistatic agent SH-105 is used as antistatic agent
  • acrylic glue is used as glue.
  • the peeling layer is a PET release film.
  • the weight percentage of PMMA particles in the base layer of the reflective film is 10%.
  • the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is controlled between 0.1 ⁇ m-0.5 ⁇ m, and the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 1%.
  • the structure of the optical reflection film in this embodiment is the same as that of the first embodiment.
  • the resin layer 2 in this embodiment is epoxy resin
  • the temperature regulating particles 3 of core-shell structure have a shell layer of TiO 2 and a core layer of polyethylene glycol.
  • antistatic agent SH-105 is used as antistatic agent
  • polyurethane glue is used as glue.
  • the peeling layer is a PET release film.
  • the weight percentage of PMMA particles in the base layer of the reflective film is 18%.
  • the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is controlled between 0.1-0.5 ⁇ m, and the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 15%.
  • the comparative example is the same as that of Example 1, except that the first resin layer and the second resin layer do not contain temperature-adjusting particles with a core-shell structure.
  • Example 1 The products of Example 1-Example 6 and Comparative Example were kept at 85° C. for 30 minutes to test their transverse heat shrinkage and longitudinal heat shrinkage. The test results are shown in Table 1.
  • the thermal shrinkage rate of the optical reflective film provided by the present application is lower after being kept at 85° C. for 30 min.
  • the transverse thermal shrinkage rate of Example 6 is only 9.1% of the comparative example
  • the longitudinal thermal shrinkage rate is only 23% of the comparative example.

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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

L'invention concerne un film de réflexion optique. Le film de réflexion optique comprend une première couche de résine (2), une couche de base de film de réflexion (1), une seconde couche de résine (7), une couche adhésive (4) et une couche de pelage (5), qui sont agencées de manière séquentielle, la première couche de résine (2) et la seconde couche de résine (7) étant remplies de particules d'ajustement de température ayant une structure noyau-enveloppe (3) ; la couche adhésive (4) comprend un agent antistatique ; et la couche de base de film de réflexion (1) comprend une résine principale, des particules organiques incompatibles avec la résine principale, des particules inorganiques incompatibles avec la résine principale et des trous (6), les trous (6) étant situés entre les particules organiques et la résine principale, et entre les particules inorganiques et la résine principale, et la différence de densité entre les particules organiques et la résine principale étant inférieure à 0,25 g/cm3. Selon le film de réflexion optique, le retrait et la distorsion du film réfléchissant provoqués par un changement de température environnemental peuvent être empêchés.
PCT/CN2021/119271 2020-12-04 2021-09-18 Film de réflexion optique WO2022116647A1 (fr)

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KR1020237007125A KR20230042119A (ko) 2020-12-04 2021-09-18 광학 반사 필름

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CN202011399110.1A CN112433283B (zh) 2020-12-04 2020-12-04 一种低热收缩、自粘合型光学反射膜
CN202011399110.1 2020-12-04

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CN112433283B (zh) * 2020-12-04 2021-09-21 宁波东旭成新材料科技有限公司 一种低热收缩、自粘合型光学反射膜

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KR20240067278A (ko) * 2017-04-10 2024-05-16 닛토덴코 가부시키가이샤 편광판 및 화상 표시 장치
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WO2007046649A1 (fr) * 2005-10-20 2007-04-26 Lgs Corporation, Ltd Film optique multicouche a nanoparticules
CN103176229A (zh) * 2013-04-12 2013-06-26 宁波长阳科技有限公司 一种复合光学反射膜及其制备方法
CN104536066A (zh) * 2015-01-19 2015-04-22 苏州胜利精密制造科技股份有限公司 新型反射片及其液晶显示模组
CN110494772A (zh) * 2017-04-10 2019-11-22 日东电工株式会社 光学膜、偏振片及图像显示装置
CN109814187A (zh) * 2019-03-22 2019-05-28 宁波东旭成新材料科技有限公司 一种光学反射膜
CN112433283A (zh) * 2020-12-04 2021-03-02 宁波东旭成新材料科技有限公司 一种低热收缩、自粘合型光学反射膜

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CN112433283B (zh) 2021-09-21
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