WO2022116647A1 - Optical reflection film - Google Patents

Optical reflection film 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
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Application number
PCT/CN2021/119271
Other languages
French (fr)
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
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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/en
Publication of WO2022116647A1 publication Critical patent/WO2022116647A1/en

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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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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
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Abstract

An optical reflection film. The optical reflection film comprises a first resin layer (2), a reflection film base layer (1), a second resin layer (7), an adhesive layer (4) and a peeling layer (5), which are sequentially arranged, wherein the first resin layer (2) and the second resin layer (7) are filled with temperature-adjusting particles with a core-shell structure (3); the adhesive layer (4) comprises an antistatic agent; and the reflection film base layer (1) comprises a main resin, organic particles incompatible with the main resin, inorganic particles incompatible with the main resin and holes (6), wherein the holes (6) are located between the organic particles and the main resin, and between the inorganic particles and the main resin, and the density difference between the organic particles and the main resin is less than 0.25 g/cm3. According to the optical reflection film, shrinkage and distortion of the reflective film caused by an environmental temperature change can be prevented.

Description

一种光学反射膜an optical reflective film
相关申请Related applications
本申请要求2020年12月4日申请的，申请号为202011399110.1，发明名称为“一种低热收缩、自粘合型光学反射膜”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application filed on December 4, 2020, the application number is 202011399110.1, and the invention name is "a low thermal shrinkage, self-adhesive optical reflective film", the entire content of which is incorporated herein by reference Applying.
技术领域technical field
本申请涉及一种光学反射膜。The present application relates to an optical reflection film.
背景技术Background technique
液晶显示器作本身不会发光，显示作用得益于调制背光源发出的光，显示器的性能指标依赖于背光源的性能，因此背光模组光源性能的好坏直接影响液晶显像的质量。反射膜是液晶显示器的背光模组中最重要的光学膜之一，在液晶显示器当中，反射膜在导光板背光模组的底部，将光源泄漏出的光反射回到导光板，使其能够集中正面投射，防止光线外泄，以达到增加光的使用效率。然而，背光模组长时间工作产生的热量会导致反射膜产生热收缩形变，同时反射膜在背光模组中一般是通过在双面边缘粘合遮光胶固定，反射膜上方的空间不足，导致反射膜很容易出现膜拱、褶皱、分层等不良现象，严重影响显示效果。传统背光模组结构中没有考虑设计光学膜可靠性的结构。因此，现有技术存在不足，需要改进。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. However, the heat generated by the backlight module for a long time will cause thermal shrinkage and deformation of the reflective film. At the same time, 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.
发明内容SUMMARY OF THE INVENTION
为了克服现有反射膜中的上述不足，本申请提供一种光学反射膜，其具有热收缩率低的特点，且具有自粘合性。In order to overcome the above-mentioned deficiencies in the existing reflective films, the present application provides an optical reflective film, which has the characteristics of low thermal shrinkage and self-adhesion.
本申请提供了一种光学反射膜，其包括依次设置的第一树脂层、反射膜基层、第二树脂层、胶水层和剥离层，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,
所述第一树脂层和所述第二树脂层包括具有核壳结构的调温微粒；The first resin layer and the second resin layer include temperature-adjusting particles having a core-shell structure;
所述胶水层包括抗静电剂和胶水；The glue layer includes an antistatic agent and glue;
所述反射膜基层包括主体树脂、与所述主体树脂不相容的有机粒子、与所述主体树脂不相容的无机粒子以及孔洞，所述孔洞位于所述有机粒子与主体树脂之间、所述无机粒子与主体树脂之间，所述有机粒子的密度与所述主体树脂的密度之间的差值小于0.25g/cm 3。 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 .
可选的，第一树脂层和所述第二树脂层包括环氧树脂、丙烯酸树酯或有机硅中的至少一种。Optionally, the first resin layer and the second resin layer include at least one of epoxy resin, acrylic resin or silicone.
可选的，所述调温微粒的壳层为SiO 2、TiO 2、ZnO或BaTiO 3中的至少一种，核层为石蜡、聚乙二醇或硬脂酸丁酯中的至少一种。 Optionally, the shell layer of the temperature-adjusting particles is at least one of SiO 2 , TiO 2 , ZnO or BaTiO 3 , and the core layer is at least one of paraffin, polyethylene glycol or butyl stearate.
可选的所述抗静电剂为抗静电剂SN、抗静电剂TM、抗静电剂SP或抗静电剂SH-105中的至少一种；所述胶水为丙烯酸胶水、有机硅胶水或聚氨酯胶水中的至少一种。Optionally, 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.
可选的，所述有机粒子的表面张力与主体树脂的表面张力之间的差值大于20dyn/cm。Optionally, the difference between the surface tension of the organic particles and the surface tension of the host resin is greater than 20 dyn/cm.
可选的，所述主体树脂为PET；所述有机粒子为经PTFE表面处理过的PMMA粒子，该所述PMMA粒子的粒径在1μm以下。Optionally, 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 μm.
可选的，所述PMMA粒子在所述反射膜基层中的重量百分比在1％-20％之间。Optionally, the weight percentage of the PMMA particles in the base layer of the reflective film is between 1% and 20%.
可选的，所述无机粒子为二氧化钛粒子，所述二氧化钛粒子的粒径为0.1μm-0.5μm，所述二氧化钛粒子在所述反射膜基层中的重量百分比在1％-15％之间。Optionally, the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is 0.1 μm-0.5 μm, and the weight percentage of the titanium dioxide particles in the reflective film base layer is between 1% and 15%.
本申请的有益效果在于：反射膜双面涂覆含有调温微粒子的树脂层，通过吸收/释放热量，使膜层保持稳定且合适的工作温度，防止因环境温度变化造成反射膜收缩形变。去除剥离膜后的反射膜可直接粘合在背光模组中，避免了传统遮光胶固定法因热收缩大导致光学反射膜易产生膜拱、褶皱、分层等不良现象，可以用于不同尺寸的光学模组中。The beneficial effect of the present application is that: 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.
附图说明Description of drawings
图1是本申请的结构示意图。FIG. 1 is a schematic structural diagram of the present application.
附图中，1代表反射膜基层；2代第一表树脂层；3单标调温颗粒；4代表胶水层；5代表剥离层；6代表孔洞；7代表第二树脂层。In the drawings, 1 represents the base layer of the reflective film; 2 represents the first resin layer; 3 represents the single-standard temperature-adjusting particles; 4 represents the glue layer; 5 represents the peeling layer; 6 represents the holes; 7 represents the second resin layer.
具体实施方式Detailed ways
本申请中，提供了一种光学反射膜，包括：依次设置的第一树脂层、反射膜基层、第二树脂层、胶水层和剥离层。第一树脂层和第二树脂层中包括核壳结构的调温微粒。胶水层包括抗静电剂和胶水。反射膜基层包括主体树脂、与所述主体树脂不相容的有机粒子、与所述主体树脂不相容的无机粒子以及孔洞。孔洞位于有机粒子与主体树脂之间、无机粒子与主体树脂之间。有机粒子的密度与所述主体树脂的密度之间的差值小于0.25g/cm 3。 In the present application, an optical reflective film is provided, 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 .
设置在第一树脂层和第二树脂层中的调温微粒可以吸收/释放热量。通过在第一树脂层和第二树脂层中添加调温微粒，可以使光学反射膜保持在稳定 且适合工作的温度范围内，进而防止因环境温度变化造成的反射膜收缩变形。在剥离膜去除后，本申请的光学反射膜可以直接通过胶水层贴合在背光模组中，避免了传统遮光胶固定法因热收缩大导致光学反射膜易产生膜拱、褶皱、分层等不良现象，适用于不同尺寸的光学模组中。The temperature-adjusting particles provided in the first resin layer and the second resin layer can absorb/release heat. By adding temperature-adjusting particles to the first resin layer and the second resin layer, 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. After the peeling film is removed, 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.
一些实施例中，第一树脂层和第二树脂层包括环氧树脂、丙烯酸树酯或有机硅中的至少一种。在一些实施例中，第一树脂层和第二树脂层包括丙烯酸树脂。In some embodiments, 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.
一些实施例中，调温微粒的壳层为SiO 2、TiO 2、ZnO或BaTiO 3中的至少一种，核层为石蜡、聚乙二醇或硬脂酸丁酯中的至少一中。 In some embodiments, the shell layer of the temperature-adjusting particles is at least one of SiO 2 , TiO 2 , ZnO or BaTiO 3 , and the core layer is at least one of paraffin, polyethylene glycol or butyl stearate.
石蜡的熔点为55℃-60℃。分子量不同时，聚乙二醇(PEG)的熔点也不同，在本申请中，使用分子量为4000左右的聚乙二醇，其熔点为75℃-80℃。硬脂酸丁酯的熔点为30℃左右。一般地，显示器的工作温度为60℃左右。在本申请中，可以根据显示器的工作温度，采用石蜡、聚乙二醇和硬脂酸丁酯中的至少一种作为调温粒子的核层。当显示器工作时，显示器的温度升高，达到核层材料的熔化温度附近，核层材料融化吸收热量，有助于降低光学反射膜的温度。在一些实施例中，核层材料的种类和各类核层材料的百分比可以根据光学反射膜的工作温度进行调整。在一些实施例中，核层材料为石蜡。The melting point of paraffin is 55°C-60°C. When the molecular weight is different, the melting point of polyethylene glycol (PEG) is also different. In this application, 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. Generally, the working temperature of the display is about 60°C. In the present application, 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. When the display is working, 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. In some embodiments, 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. In some embodiments, the core layer material is paraffin.
采用SiO 2、TiO 2、ZnO和BaTiO 3的至少一种作为核壳结构的壳层，可以保护调温粒子的核层。在核层吸热融化时，壳层可以保护融化的核层不外泄。使用SiO 2、TiO 2、ZnO和BaTiO 3的至少一种作为核壳结构的壳层还可以提高调温粒子的分散性，使之更均匀地分散在第一树脂层和第二树脂层中。此外，使用SiO 2、TiO 2、ZnO和BaTiO 3的至少一种作为核壳结构的壳层还可以在一定程度上提高光学反射膜的反射率。在一些实施例中，使用TiO 2作为调温粒 子的核层。TiO 2具有高折射率，可以提高光学反射膜在波长为380nm-700nm范围内的反射率。 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. In addition, 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 reflectivity of the optical reflection film to a certain extent. In some embodiments, 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.
在一些实施例中，调温粒子的直径为1μm-10μm；可选为3μm-5μm。当调温粒子的粒径较小时，调温粒子容易团聚，不易分散在第一树脂层和第二树脂层中；当调温粒子的粒径过大时，容易在第一树脂层和第二树脂层中沉降，产品的稳定性较差。In some embodiments, the diameter of the temperature-adjusting particles is 1 μm-10 μm; optionally, it is 3 μm-5 μm. When 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.
一些实施例中，所述抗静电剂为抗静电剂SN、抗静电剂TM、抗静电剂SP或抗静电剂SH-105中的至少一种；所述胶水为丙烯酸胶水、有机硅胶水或聚氨酯胶水中的至少一种。In some embodiments, 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.
在胶水层中加入抗静电剂，有助于消除有害电荷的危害，一方面可以防止背光模组组装时吸附异物，使得光学反射膜可以更顺利地贴合在背光模组中；另一方面也可以消除静电放电导致的电器元件击穿，影响光学反射膜使用。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.
一些实施例中，所述有机粒子的表面张力与主体树脂的表面张力之间的差值大于20dyn/cm；优选为在20dyn/cm-30dyn/cm。In some embodiments, 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.
当有机粒子的表面张力和主体树脂的表面张力的差值在20dyn/cm-30dyn/cm范围内时，在反应膜基层被外力拉伸的时候，因为有机粒子和主体树脂的表面张力不同，会产生孔洞。如果有机粒子和主体树脂表面张力过大，可能会降低光学反射膜的强度、影响光学反射膜成型；当有机粒子和主体树脂表面张力差别较小的时候，不易产生孔洞。孔洞可以增加光学反射膜的反射率。When 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.
一些实施例中，所述主体树脂为PET；所述有机粒子为经PTFE表面处理过的PMMA粒子，该所述PMMA粒子的粒径在1μm以下，可选为0.3μm -0.5μm。In some embodiments, 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 μm, optionally 0.3 μm to 0.5 μm.
PMMA和PET在可见光波长范围内(380nm-740nm)具有较高的反射率，采用PET和PMMA有助于提高光学反射膜的反射率。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.
一些实施例中，所述PMMA粒子在所述反射膜基层中的重量百分比在1％-20％之间；可选为10％-15％。当PMMA粒子的含量过多时，不利于光学反射膜成膜；当PMMA粒子的含量过低时，不利于增强光学反射膜的反射率。In some embodiments, the weight percentage of the PMMA particles in the base layer of the reflective film is between 1%-20%; optionally, it is 10%-15%. When 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.
一些实施例中，所述无机粒子为二氧化钛粒子，所述二氧化钛粒子的粒径为0.1μm-0.5μm，所述二氧化钛粒子在所述反射膜基层中的重量百分比在1％-15％之间。In some embodiments, the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is 0.1 μm-0.5 μm, and the weight percentage of the titanium dioxide particles in the reflective film base layer is between 1% and 15%.
在一些实施例中，剥离层为PET离型膜。在一些实施例中，为剥离力为5gf/inch-10gf/inch的PET轻离型膜。剥离层可以起到保护胶水层的作用。在使用过程中，可以去除剥离层，去除剥离膜后的反射膜可直接粘合在背光模组中，避免了传统遮光胶固定法因热收缩大导致光学反射膜易产生膜拱、褶皱、分层等不良现象，可以用于不同尺寸的光学模组中。In some embodiments, 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.
本申请中，PET(Polyethylene Terephthalate)为聚对苯二甲酸乙二醇酯。PMMA(Polymethyl Methacrylate)为聚甲基丙烯酸甲酯。PVC(Polyvinyl chloride)为聚氯乙烯。PTFE(Poly Tetra Fluoroethylene)为聚四氟乙烯。抗静电剂TM为季铵盐型阳离子表面活性剂，主要化学成分是，甲基三羟乙基甲基硫酸铵。抗静电剂SP为，是一种季铵盐型阳离子表面活性剂，主要成分是硬脂酰胺丙基二甲基β－羟乙基铵二氢磷酸盐。抗静电剂SH-105为微黄色粘稠状透明液体，属季铵盐阳离子表面活性剂，主要化学组成为十二烷基羟丙基二羟乙基甲基硫酸甲脂铵。抗静电剂SN为阳离子表面活性剂，主要成分是十八烷基二甲基羟乙基季铵硝酸盐。In this application, PET (Polyethylene Terephthalate) is polyethylene terephthalate. PMMA (Polymethyl Methacrylate) is polymethyl methacrylate. PVC (Polyvinyl chloride) is polyvinyl chloride. PTFE (Poly Tetra Fluoroethylene) is polytetrafluoroethylene. 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 β-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.
下面结合具体实施方式对本申请作进一步详细说明。The present application will be further described in detail below in conjunction with specific embodiments.
实施例一Example 1
如图1所示的光学反射膜，包括依次设置的第一树脂层2、反射膜基层1、第二树脂层7、胶水层4和剥离层5。在本实施例种，第一树脂层2和第二树脂层7中包括核壳结构的调温微粒3。胶水层4包括抗静电剂和胶水。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. In this embodiment, 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.
本实施例中，反射膜基层1包括主体树脂、与所述主体树脂不相容的有机粒子、与所述主体树脂不相容的无机粒子以及孔洞6。孔洞6位于有机粒子与主体树脂之间、无机粒子与主体树脂之间。有机粒子的密度与所述主体树脂的密度之间的差值小于0.25g/cm 3。 In this embodiment, 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 .
本实施例中所述树脂层2为环氧树脂；核壳结构的调温微粒3其壳层为SiO 2，其核层为石蜡。本实施例中，抗静电剂采用抗静电剂SN，胶水采用丙烯酸胶水。剥离层为PET离型膜。 In this embodiment, 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. In this embodiment, antistatic agent SN is used as antistatic agent, and acrylic glue is used as glue. The peeling layer is a PET release film.
本实施例中所述主体树脂为PET；有机粒子为经PTFE表面处理过的PMMA粒子，该PMMA粒子的粒径在1μm以下，PMMA粒子在反射膜基层中的重量百分比为15％。In this embodiment, 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 μm, and the weight percentage of the PMMA particles in the base layer of the reflective film is 15%.
本实施例中所述无机粒子为二氧化钛粒子，该二氧化钛粒子的粒径控制在0.1μm-0.5μm之间，该二氧化钛粒子在反射膜基层中的重量百分比为10％。In this embodiment, the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is controlled between 0.1 μm and 0.5 μm, and the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 10%.
实施例二 Embodiment 2
本实施例中的光学反射膜的结构和实施例一相同。The structure of the optical reflection film in this embodiment is the same as that of the first embodiment.
本实施例与实施例一不同之处在于：本实施例中所述树脂层2为丙烯酸树酯；核壳结构的调温微粒3其壳层为TiO 2，其核层为聚乙二醇。 The difference between this embodiment and the first embodiment is that 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.
本实施例中，抗静电剂采用抗静电剂TM，胶水采用有机硅胶水。剥离层为PET离型膜。In this embodiment, antistatic agent TM is used as antistatic agent, and organic silica gel water is used as glue. The peeling layer is a PET release film.
PMMA粒子在反射膜基层中的重量百分比为5％。The weight percentage of PMMA particles in the base layer of the reflective film is 5%.
本实施例中所述无机粒子为二氧化钛粒子，该二氧化钛粒子的粒径控制在0.1μm-0.5μm之间，该二氧化钛粒子在反射膜基层中的重量百分比为8％。In this embodiment, the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is controlled between 0.1 μm and 0.5 μm, and the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 8%.
实施例三Embodiment 3
参照图1Refer to Figure 1
本实施例中的光学反射膜的结构和实施例一相同。The structure of the optical reflection film in this embodiment is the same as that of the first embodiment.
本实施例与实施例一不同之处在于：本实施例中所述树脂层2为有机硅；核壳结构的调温微粒3其壳层为ZnO，其核层为硬脂酸丁酯。The difference between this embodiment and the first embodiment is that: 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.
本实施例中，抗静电剂采用抗静电剂SP，胶水采用聚氨酯胶水。剥离层为PET离型膜。In this embodiment, antistatic agent SP is used as antistatic agent, and polyurethane glue is used as glue. The peeling layer is a PET release film.
PMMA粒子在反射膜基层中的重量百分比为1％。The weight percentage of PMMA particles in the base layer of the reflective film is 1%.
本实施例中所述无机粒子为二氧化钛粒子，该二氧化钛粒子的粒径控制在0.1μm-0.5μm之间，该二氧化钛粒子在反射膜基层中的重量百分比为12％。In this embodiment, the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is controlled between 0.1 μm-0.5 μm, and the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 12%.
实施例四Embodiment 4
本实施例中的光学反射膜的结构和实施例一相同。The structure of the optical reflection film in this embodiment is the same as that of the first embodiment.
本实施例与实施例一不同之处在于：本实施例中所述树脂层2为环氧树脂；核壳结构的调温微粒3其壳层为BaTiO 3，其核层为石蜡。 The difference between this embodiment and the first embodiment is that 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.
本实施例中，抗静电剂采用抗静电剂SN，胶水采用聚氨酯胶水。剥离层为PET离型膜。In this embodiment, the antistatic agent adopts antistatic agent SN, and the glue adopts polyurethane glue. The peeling layer is a PET release film.
PMMA粒子在反射膜基层中的重量百分比为20％。The weight percentage of PMMA particles in the base layer of the reflective film is 20%.
本实施例中所述无机粒子为二氧化钛粒子，该二氧化钛粒子的粒径控制在0.1μm-0.5μm之间，该二氧化钛粒子在反射膜基层中的重量百分比为5％。In this embodiment, the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is controlled between 0.1 μm-0.5 μm, and the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 5%.
实施例五 Embodiment 5
本实施例中的光学反射膜的结构和实施例一相同。The structure of the optical reflection film in this embodiment is the same as that of the first embodiment.
本实施例与实施例一不同之处在于：本实施例中所述树脂层2为丙烯酸树脂；核壳结构的调温微粒3其壳层为SiO 2，其核层为硬脂酸丁酯。 The difference between this embodiment and the first embodiment is that: 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.
本实施例中，抗静电剂采用抗静电剂SH-105，胶水采用丙烯酸胶水。剥离层为PET离型膜。In this embodiment, antistatic agent SH-105 is used as antistatic agent, and acrylic glue is used as glue. The peeling layer is a PET release film.
PMMA粒子在反射膜基层中的重量百分比为10％。The weight percentage of PMMA particles in the base layer of the reflective film is 10%.
本实施例中所述无机粒子为二氧化钛粒子，该二氧化钛粒子的粒径控制在0.1μm-0.5μm之间，该二氧化钛粒子在反射膜基层中的重量百分比为1％。In this embodiment, the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is controlled between 0.1 μm-0.5 μm, and the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 1%.
实施例六 Embodiment 6
本实施例中的光学反射膜的结构和实施例一相同。The structure of the optical reflection film in this embodiment is the same as that of the first embodiment.
本实施例与实施例一不同之处在于：本实施例中所述树脂层2为环氧树脂；核壳结构的调温微粒3其壳层为TiO 2，其核层为聚乙二醇。 The difference between this embodiment and the first embodiment is that: 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.
本实施例中，抗静电剂采用抗静电剂SH-105，胶水采用聚氨酯胶水。剥离层为PET离型膜。In this embodiment, antistatic agent SH-105 is used as antistatic agent, and polyurethane glue is used as glue. The peeling layer is a PET release film.
PMMA粒子在反射膜基层中的重量百分比为18％。The weight percentage of PMMA particles in the base layer of the reflective film is 18%.
本实施例中所述无机粒子为二氧化钛粒子，该二氧化钛粒子的粒径控制在0.1-0.5μm之间，该二氧化钛粒子在反射膜基层中的重量百分比为15％。In this embodiment, the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is controlled between 0.1-0.5 μm, and the weight percentage of the titanium dioxide particles in the base layer of the reflective film is 15%.
对比例Comparative ratio
除了第一树脂层和第二树脂层中不含核壳结构的调温微粒外，对比例和实施例一相同。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.
将实施例1-实施例6和对比例的产品在85℃下保持30min，以测试其横向热收缩率和纵向热收缩率，检测结果如表1所示。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.
表1Table 1
Figure PCTCN2021119271-appb-000001
Figure PCTCN2021119271-appb-000001
由表1内容可知，与对比例相比，本申请提供的光学反射膜在85℃下保持30min后，的热收缩率较低。其中，实施例6的横向热收缩率仅为对比例的9.1％，纵向热收缩率仅为对比例的23％。由此可知，在调温粒子的帮助下，本申请的光学反射膜在使用过程中温度变化较小，因此具有比现有技术中的光学反射膜更好的热收缩率、在使用过程中不易变形。进一步地，使得本申请的光学反射膜具有更长的寿命。It can be seen from Table 1 that, compared with the comparative example, 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. Among them, the transverse thermal shrinkage rate of Example 6 is only 9.1% of the comparative example, and the longitudinal thermal shrinkage rate is only 23% of the comparative example. It can be seen that, with the help of the temperature-adjusting particles, the temperature change of the optical reflective film of the present application is small during use, so it has a better thermal shrinkage rate than the optical reflective film in the prior art, and is not easy to use during use. deformed. Further, the optical reflection film of the present application has a longer life.

Claims (8)

  1. 一种光学反射膜，其特征在于：An optical reflection film, characterized in that:
    包括依次设置的第一树脂层、反射膜基层、第二树脂层、胶水层和剥离层，It includes a first resin layer, a reflective film base layer, a second resin layer, a glue layer and a peeling layer arranged in sequence,
    所述第一树脂层和所述第二树脂层包括具有核壳结构的调温微粒；The first resin layer and the second resin layer include temperature-adjusting particles having a core-shell structure;
    所述胶水层包括抗静电剂和胶水；The glue layer includes an antistatic agent and glue;
    所述反射膜基层包括主体树脂、与所述主体树脂不相容的有机粒子、与所述主体树脂不相容的无机粒子以及孔洞，所述孔洞位于所述有机粒子与主体树脂之间、所述无机粒子与主体树脂之间，所述有机粒子的密度与所述主体树脂的密度之间的差值小于0.25g/cm 3。 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 .
  2. 如权利要求1所述光学反射膜，其中：所述第一树脂层和所述第二树脂层包括环氧树脂、丙烯酸树酯或有机硅中的至少一种。The optical reflective film of claim 1, wherein the first resin layer and the second resin layer comprise at least one of epoxy resin, acrylic resin or silicone.
  3. 如权利要求2所述低热收缩、自粘合型光学反射膜，其中：所述调温微粒的壳层为SiO 2、TiO 2、ZnO或BaTiO 3中的至少一种，核层为石蜡、聚乙二醇或硬脂酸丁酯中的至少一种。 The low-thermal-shrinkage, self-adhesive optical reflective film of claim 2, wherein the shell layer of the temperature-adjusting particles is at least one of SiO 2 , TiO 2 , ZnO or BaTiO 3 , and the core layer is paraffin, poly At least one of ethylene glycol or butyl stearate.
  4. 如权利要求3所述光学反射膜，其中：所述抗静电剂为抗静电剂SN、抗静电剂TM、抗静电剂SP或抗静电剂SH-105中的至少一种；所述胶水为丙烯酸胶水、有机硅胶水或聚氨酯胶水中的至少一种。The optical reflective film according to claim 3, wherein: the antistatic agent is at least one of antistatic agent SN, antistatic agent TM, antistatic agent SP or antistatic agent SH-105; and the glue is acrylic acid At least one of glue, silicone water or polyurethane glue.
  5. 如权利要求1-4中任意一个所述光学反射膜，其中：所述有机粒子的表面张力与主体树脂的表面张力之间的差值大于20dyn/cm。The optical reflective film according to any one of claims 1 to 4, wherein the difference between the surface tension of the organic particles and the surface tension of the host resin is greater than 20 dyn/cm.
  6. 如权利要求5所述光学反射膜，其中：所述主体树脂为PET；所述有机粒子为经PTFE表面处理过的PMMA粒子，该所述PMMA粒子的粒径在1μm以下。The optical reflective film according to claim 5, wherein: 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 μm.
  7. 如权利要求6所述光学反射膜，其中：所述PMMA粒子在所述反射膜基层中的重量百分比在1％-20％之间。The optical reflective film of claim 6, wherein the weight percentage of the PMMA particles in the reflective film base layer is between 1% and 20%.
  8. 如权利要求7所述光学反射膜，其中：所述无机粒子为二氧化钛粒子，所述二氧化钛粒子的粒径为0.1μm-0.5μm，所述二氧化钛粒子在所述反射膜基层中的重量百分比在1％-15％之间。The optical reflection film according to claim 7, wherein: the inorganic particles are titanium dioxide particles, the particle size of the titanium dioxide particles is 0.1 μm-0.5 μm, and the weight percentage of the titanium dioxide particles in the base layer of the reflection film is 1 %-15%.
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