WO2013189163A1 - 封框胶固化方法及固化装置 - Google Patents

封框胶固化方法及固化装置 Download PDF

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Publication number
WO2013189163A1
WO2013189163A1 PCT/CN2012/087230 CN2012087230W WO2013189163A1 WO 2013189163 A1 WO2013189163 A1 WO 2013189163A1 CN 2012087230 W CN2012087230 W CN 2012087230W WO 2013189163 A1 WO2013189163 A1 WO 2013189163A1
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WIPO (PCT)
Prior art keywords
curing
microwave
sealant
frame
substrate
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PCT/CN2012/087230
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English (en)
French (fr)
Inventor
刘方兴
程凌志
孔德钱
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北京京东方光电科技有限公司
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Publication of WO2013189163A1 publication Critical patent/WO2013189163A1/zh

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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/64Heating using microwaves
    • H05B6/80Apparatus for specific applications
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/1303Apparatus specially adapted to the manufacture of LCDs
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1339Gaskets; Spacers; Sealing of cells
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2206/00Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/04Heating using microwaves
    • H05B2206/046Microwave drying of wood, ink, food, ceramic, sintering of ceramic, clothes, hair

Definitions

  • Embodiments of the present invention relate to a frame sealant curing method and a curing device. Background technique
  • the sealant generally contains an acryl-based compound and an epoxy-based resin compound.
  • the sealing gel is heated and melted by a combination of ultraviolet curing and heat curing, and a chemical reaction is caused at the same time to achieve a curing effect.
  • Ultraviolet light cures acryl-based compounds, while heat-curing cures the ring! ⁇ resin-like compound.
  • Figure 1 is a schematic view of a curing apparatus.
  • the frame sealing glue curing device when curing by ultraviolet curing, the frame sealing glue curing device needs to provide the ultraviolet light source 11 in the ultraviolet curing furnace, set the angle 12 of the light source irradiation, and need to provide a side reflection plate 13 to illuminate the ultraviolet light from the side. Frame the glue so that the light is constantly reflected and fully utilized.
  • the existing ultraviolet curing method often causes incomplete curing, resulting in poor curing and poor curing effect.
  • the existing UV curing technology improves the curing effect by increasing the intensity of the ultraviolet light, but it will have a negative effect of increasing energy consumption.
  • the UV curing oven is used for curing.
  • the ultraviolet curing oven is generally divided into several layers, which is bulky and generally has a height of about 4 meters.
  • each layer is provided with a glass substrate, and several glass substrates are cured at the same time. Since each glass substrate is placed at different times and the curing time is the same, it is necessary to take out the sheets at different time intervals and solidify them. The glass substrate is cumbersome.
  • One of the objects of the present invention is to provide a frame sealant curing method and a curing device to solve the problems of the prior art curing device being complicated, and having a long curing time and incomplete curing.
  • One embodiment of the present invention provides a frame sealant curing method in which the frame sealant is cured by microwave.
  • the microwave has a frequency of 2.5 GHz.
  • the sealant is cured by microwave for approximately 5 minutes.
  • the sealant is used to connect the array substrate and the color filter substrate in the liquid crystal display panel.
  • Another embodiment of the present invention provides a frame sealant microwave curing device, the device comprising: an outer casing;
  • a movable member disposed on the outer casing having two states of opening and closing, and the movable member in a closed state and the outer casing constitute a closed cavity for accommodating a substrate provided with a sealant to be cured;
  • a bracket disposed in the cavity for placing a substrate
  • a microwave generating device disposed in the cavity.
  • the cavity is a hexahedron.
  • the movable member is disposed on a side of the hexahedron and enters and exits the inlet and outlet of the cavity as the substrate when in an open state;
  • the height of the inlet and outlet matches the thickness of the glass substrate, and the width of the inlet and outlet matches the width of the substrate into and out of the cavity.
  • the microwave generating device comprises a plurality of magnetrons having a microwave transmitting function distributed on the inner wall of the top surface and/or the bottom surface of the hexahedron, on the inner wall of the top surface and/or the bottom surface
  • the magnetrons are distributed in parallel and at equal intervals.
  • the bracket is disposed on an inner wall of the hexahedron having two opposite sides of the movable member; positions of the inner walls of the two sides are disposed at a height direction of the outer casing --correspond.
  • the outer casing is made of a stainless steel metal material.
  • the above apparatus is used to carry out the frame sealant curing method as described above.
  • the efficiency is higher than that of UV curing and heat curing, and under the condition of low energy consumption, the effect is better than ultraviolet curing and heat curing, reducing energy consumption and saving cost;
  • microwave curing involves free radical polymerization, and the main component of the sealant is suitable for microwave curing;
  • microwave radiation curing can accelerate the curing speed, improve the physical properties of the solidified product, and have high curing efficiency, save a lot of time and increase the production capacity;
  • the microwave curing device does not require a side reflector, and does not require an ultraviolet light source and an electric heating device, and has a small volume.
  • FIG. 1 is a schematic view of a curing device for curing in a UV curing manner in the prior art
  • FIG. 2 is a schematic structural view of a frame sealing rubber curing device provided in an embodiment of the present invention
  • FIG. 3A is a schematic view showing the direction of the glass substrate in the curing device according to the embodiment of the present invention
  • FIG. 3B is a schematic view showing another direction of the glass substrate placed in the curing device according to the embodiment of the present invention
  • a side cross-sectional view of the frame sealant curing device is a schematic view showing the direction of the glass substrate in the curing device according to the embodiment of the present invention.
  • Embodiments of the present invention provide a method for curing a frame sealant.
  • the curing of the sealant is performed by a curing method using microwave radiation.
  • microwave radiation curing technology is mainly used for radical polymerization (such as acrylic resin, unsaturated polyester / styrene system) / lactone ring-opening polymerization, epoxy resin / amine and epoxy resin / anhydride.
  • radical polymerization such as acrylic resin, unsaturated polyester / styrene system
  • lactone ring-opening polymerization epoxy resin / amine and epoxy resin / anhydride.
  • the above compounds have no volatile substances present or generated during the thermal crosslinking process, and the safety of microwave curing can be ensured.
  • the sealant used in the field of liquid crystal display contains acryl-based and epoxy-based resins, wherein the epoxy resin is suitable for microwave heating, so microwave curing can replace most conventional UV-curing and heat-curing frame sealant curing. the way.
  • microwave curing is suitable for all current frame sealant materials.
  • Microwave radiation curing can significantly accelerate the curing speed and improve the physical properties of the cured product.
  • DDM 4,4-diamino-diphenyl decane
  • the polyurethane/epoxy composite can be prepared by microwave curing.
  • the chemical structure of the cured product is the same as the conventional thermal curing, but the curing efficiency is greater than the thermal curing.
  • the elastic modulus of the material obtained by microwave irradiation for 30 minutes is l lOlMPa, and it takes 6 hours to achieve the same performance by thermal curing at 120 degrees; when the thioglycolic acid is subjected to microwave radiation bulk polymerization, it can reach above 90 in 4 ⁇ 10 minutes. % conversion rate, while traditional bulk polymerization requires 3 to 5 hours to achieve the same conversion rate. It can be seen that microwave curing can increase production capacity.
  • the microwave frequency can be, for example, 2.5 GHz.
  • multi-wavelength microwaves can be used for curing according to actual conditions to enhance the curing effect.
  • the curing efficiency of the microwave is several times or even tens of times that of the ultraviolet curing and the thermal curing, it is preferable that in the embodiment of the present invention, when the frame sealing agent is cured by microwave irradiation, the curing in the conventional curing method needs to be performed for about one hour.
  • the same curing effect can be achieved by shortening the time to about 5 minutes, and because the curing time is shortened, the sealant can be chemically reacted and become solid in a short period of time, reducing the contact time between the liquid crystal and the sealant. , reducing the contamination of the sealant by the liquid crystal, and improving the problem of poor curing of the sealant due to liquid crystal contamination in the conventional process.
  • the microwave curing method provided by the embodiment of the invention improves the curing efficiency of the sealant and reduces The curing time of the sealant is increased, the productivity is increased, the contact time between the liquid crystal and the sealant is reduced, the contamination of the sealant by the liquid crystal is reduced, and the problem of poor curing of the sealant is solved.
  • Embodiments of the present invention also provide a frame sealant curing device, wherein the curing device is internally provided with a microwave generating device for curing the frame sealant by microwave.
  • FIG. 2 is a schematic structural view of a new frame sealant curing device according to an embodiment of the present invention.
  • the device mainly includes a casing 20, a movable component 21, a bracket 22, and a microwave generating device 23.
  • the material of the outer casing 20 is preferably a material capable of preventing leakage of microwaves, such as a metal material such as stainless steel.
  • the movable member 21 has two states of opening and closing, and is disposed on the outer casing 20, and the movable member 21 in a closed state and the outer casing 20 constitute a substrate for accommodating a sealant to be cured (for example, a glass substrate) The closed cavity 24 of the).
  • a holder 22 is disposed in the cavity 24 for placing the glass substrate.
  • the microwave generating device 23 is disposed in the cavity 24 for generating microwaves for curing the sealant of the glass substrate in the cavity by microwaves.
  • a new microwave curing frame sealing method is used to replace the existing ultraviolet curing and heat curing mixing method, so that the compound in the sealing frame rubber reacts at the same temperature or lower temperature.
  • the curing efficiency is improved, the production time is saved and the productivity is improved, and the curing effect is better than the existing mixing effect of the two ultraviolet curing modes and the heat curing method, thereby improving the curing effect and reducing the energy consumption.
  • the device for the novel microwave curing frame sealant in the first embodiment is described in detail, and the cavity is formed as a hexahedron as an example.
  • the embodiment of the present invention is only a preferred embodiment.
  • the cavity that is not used to restrict the formation is only a hexahedron, and the cavity formed can satisfy the horizontal placement of the substrate, and the microwave can directly illuminate the glass substrate.
  • the movable member 21 having two states of opening and closing is disposed on the side surface of the hexahedron, and can be used as an entrance and an exit of the glass substrate into and out of the cavity 24 when in the open state, and can be sealed in the closed state to prevent the cavity from being closed. Microwave leakage.
  • the above movable members may be provided in two and disposed on different sides as the entrance and exit of the glass substrate into and out of the cavity 24, or may be provided as only one inlet and the outlet.
  • the movable member 21 serves as an inlet and an outlet of the glass substrate, the height of the inlet and the outlet matching the thickness of the glass substrate, and the width of the inlet and the outlet and the entrance and exit of the glass substrate
  • the widths of the cavities are matched so that the glass substrate can enter and exit the cavity at will without being damaged.
  • the setting positions of the inlet and the outlet can be flexibly adjusted, and the size is the thickness of the glass substrate and the width when entering the device (that is, the dimension in the direction perpendicular to the traveling direction of the substrate in the plane of the substrate).
  • the entry position is taken as an example for description.
  • the first case the glass substrate is placed in the curing device along the side length of 1300 mm, so that the inlet can only appear on the side of the curing device with a relatively short side length as shown in Fig. 3A, and the width of the inlet is 1100mm, the height is the thickness of the glass substrate, 31 is the glass substrate, 32 is the robot, 33 is the inlet, and 34 is the glass substrate curing position.
  • the robot 32 is used to move the glass substrate which needs to cure the sealant, and the glass substrate is moved from the outside of the curing device through the inlet 33 to the glass substrate curing position 34 in the curing device.
  • the second case The glass substrate is placed in the curing device along the side length of 1100 mm. At this time, the inlet can only appear on the long side of the curing device as shown in Fig. 3B, and the inlet has a width of 1300 mm.
  • the movable member provided in the embodiment of the present invention can serve not only as an entrance and an exit of the glass substrate into and out of the cavity of the curing device, but also can function as a sealing body in the closed state.
  • the microwave generating device uses a magnetron having a microwave transmitting function to perform microwave emission.
  • the glass substrate needs to be horizontally placed, and the microwave is used for curing.
  • a plurality of magnetrons may be disposed on the top surface of the hexahedron and/or the inner wall of the bottom surface, so that the microwave emitted by the magnetron vertically illuminates the glass substrate horizontally placed in the cavity.
  • FIG. 4 is a side cross-sectional view showing a frame sealant curing device according to an embodiment of the present invention.
  • the above embodiment of the present invention utilizes the characteristics of rapid heating, uniform temperature and no hysteresis effect of the microwave, and the conventional ultraviolet curing device is removed in the frame sealant curing device, replaced with a new microwave curing device, and the utility model can be launched.
  • the microwave control tube of the microwave is disposed on the inner wall, and the microwave curing device provided by the embodiment of the invention has a smaller volume than the ultraviolet curing device.
  • the new curing unit height is set to 1.5 meters, while the conventional UV curing unit is generally 4m. about. Further, setting the height of the new curing device to 1.5 meters ensures the height of 5 glass substrates, and can cure multiple glass substrates at the same time, and the curing time is similar, which does not affect the curing effect, and saves space and cost.
  • the bracket for placing the glass substrate provided in the cavity 24 of the microwave curing device provided by the embodiment of the present invention may be disposed on the inner wall of the hexahedron having two opposite sides of the movable member 21, and the two side inner walls The position of the bracket provided is in the height direction - correspondingly, the glass substrate is horizontally placed on the bracket, and the microwave energy emitted from the top surface and the bottom magnetron is irradiated perpendicularly to the glass substrate.
  • the curing time in the conventional process generally takes about one hour, so When the microwave curing device of the embodiment of the present invention cures the sealant, the curing time can be shortened to about 5 minutes.
  • the curing time is controlled to a range of not more than 5 minutes, and the interval between the adjacent two glass substrates placed in the curing device cavity is 5 minutes or more.

Abstract

提供了一种封框胶固化方法及固化装置。该方法中通过微波进行封框胶固化。所述固化装置包括:外壳(20);设置于所述外壳(20)上具有开启与关闭两种状态的活动部件(21),且呈关闭状态的所述活动部件(21)与所述外壳(20)构成用于容纳基板的密闭的腔体(24);设置于腔体(24)内用于放置基板的支架(22);以及设置于所述腔体(24)内的微波发生装置(23)。该封框胶固化方法及固化装置减少了液晶与封框胶共混污染的时间,避免了其它条件的干扰,使得封框胶固化更完全,可解决传统工艺的固化不良。

Description

封框胶固化方法及固化装置 技术领域
本发明的实施例涉及一种封框胶固化方法及固化装置。 背景技术
在液晶显示面板中的阵列基板和彩膜基板的成盒阶段, 需要将封框胶固 化。 封框胶中一般含有丙烯酰类化合物及环氧基类树脂化合物。
现有技术中一般釆用紫外固化和热固化混合的方式使封框胶升温、熔融, 同时使其发生化学反应, 从而达到固化效果。 紫外光能够固化丙烯酰类化合 物, 而热固化能固化环! ^类树脂化合物。
图 1是固化装置的示意图。 如图 1所示, 利用紫外固化时, 封框胶固化 装置中需要在紫外固化炉中提供紫外光源 11 ,设定光源照射的角度 12,并需 要设置一个侧面反射板 13使紫外光从侧面照射封框胶, 从而使光不断反射, 充分利用。 但现有的紫外固化方式经常会出现固化不完全的现象, 导致固化 不良, 固化效果不佳的问题。 现有的紫外固化技术通过提升紫外光的强度来 改善固化效果, 但会弓 I起能耗增加的负面效应。
釆用热固化时,需要达到很高的温度才能使固化产物充分发生化学反应, 并且需要很长的时间才能达到所需的固化效果, 即使与紫外固化混合使用, 所需时间的总和也要一个小时左右。 然而, 封框胶在进行固化期间, 液晶一 直处于与封框胶接触的状态, 液晶有污染封框胶的可能, 导致封框胶固化不 良。
传统工艺中, 在封框胶进行固化的过程中釆用紫外固化炉进行固化, 紫 外固化炉一般分为数层, 体积巨大, 高度一般为 4米左右。 固化炉进行固化 时每一层都放有玻璃基板, 同时固化数张玻璃基板, 由于每张玻璃基板的放 入时间不同, 而固化的时间相同, 因此, 需要分不同时段取出各张已经固化 好的玻璃基板, 过程繁瑣。
综上所述, 现有工艺中进行封框胶固化的过程至少存在以下技术问题: ( 1 ) 、 固化不完全, 固化效果不佳; ( 2 ) 、 需要设置紫外光源和电加热装置, 固化装置复杂;
( 3 ) 、 固化时间长, 封框胶可能存在固化不良的问题。 发明内容
本发明的目的之一是提供一种封框胶固化方法及固化装置, 以解决现有 技术中固化装置复杂, 并且固化时间长、 固化不完全的问题。
本发明一个实施例提供了一种封框胶固化方法, 该方法中通过微波固化 所述封框胶。
在一个实施例中, 所述微波的频率为 2.5GHz。
在一个实施例中, 通过微波固化所述封框胶的时间大致为 5分钟。
在一个实施例中, 所述封框胶用于连接液晶显示面板中的阵列基板和彩 膜基板。
本发明另一个实施例提供了一种封框胶微波固化装置, 该装置包括: 外壳;
设置于所述外壳上具有开启与关闭两种状态的活动部件, 且呈关闭状态 的所述活动部件与所述外壳构成用于容纳设置有待固化封框胶的基板的密闭 腔体;
设置于所述腔体内用于放置基板的支架; 以及
设置于所述腔体内的微波发生装置。
在一个实施例中, 所述腔体为六面体。
在一个实施例中, 所述活动部件设置于所述六面体的侧面, 呈开启状态 时作为所述基板进出所述腔体的入口和出口;
在一个实施例中,所述入口和出口的高度与所述玻璃基板的厚度相匹配, 所述入口和出口的宽度与所述基板进出所述腔体的宽度相匹配。
在一个实施例中,所述微波发生装置包括分布于所述六面体顶面和 /或底 面的内壁上的具有微波发射功能的多个磁控管,所述顶面和 /或底面的内壁上 的所述磁控管平行且等间距分布。
在一个实施例中, 所述支架设置于所述六面体不具有所述活动部件的两 个相对的侧面的内壁上; 两个所述侧面的内壁上设置支架的位置在所述外壳 的高度方向上——对应。 在一个实施例中, 所述外壳的材质为不锈钢金属材料。
上述装置用于实施如上所述的封框胶固化方法。
Figure imgf000005_0001
效率比紫外固化及热固化高, 且在能耗较低的条件下, 达到优于紫外固化及 热固化的效果, 降低能耗, 节约成本;
( 2 )、微波固化涉及自由基聚合,封框胶中的主要成分环氧树脂适用于 微波固化;
( 3 )、封框胶中的成分在固化时无挥发性物质存在或产生,保证了微波 固化的安全性;
( 4 )、 相对于传统的热固化, 微波辐射固化可加快固化速度, 并改善固 化产物的物理性能, 固化效率高, 节约了大量时间, 提升了产能;
( 5 ) 、 固化时间缩短, 提高产能。 并且减少液晶和封框胶的接触时间, 降低液晶对封框胶的污染;
( 6 )、 微波固化装置无需侧面反射板, 无需紫外光源及电加热装置, 体 积小。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对实施例的附图作 简单地介绍,显而易见地,下面描述中的附图仅仅涉及本发明的一些实施例, 而非对本发明的限制。
图 1为现有技术中釆用紫外固化方式进行固化的固化装置示意图; 图 2为本发明实施例中提供的封框胶固化装置结构示意图;
图 3A为本发明实施例中玻璃基^ ^文入固化装置的方向示意图; 图 3B为本发明实施例中玻璃基板放入固化装置的另一种方向示意图; 图 4为本发明实施例提供的封框胶固化装置的侧视截面示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发 明实施例的附图,对本发明实施例的技术方案进行清楚、 完整地描述。显然, 所描述的实施例是本发明的一部分实施例, 而不是全部的实施例。 基于所描 述的本发明的实施例, 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例, 都属于本发明保护的范围。
本发明的实施例提供一种封框胶固化方法, 在封框胶固化的过程中, 釆 用微波辐射的固化方式进行封框胶的固化。
材料在微波作用下可以产生温度升高和熔融等物理现象, 同时还会发生 化学反应, 微波辐射能产生热量, 使材料温度升高进而发生固化反应。 目前 微波辐射固化技术主要针对自由基聚合 (如丙烯酸树脂、 不饱和聚酯 /苯乙烯 体系) /内酯开环聚合、 环氧树酯 /胺以及环氧树脂 /酸酐等。 上述化合物在 热交联过程中没有挥发性物质存在或产生, 能够保证微波固化的安全性。 进 一步的, 液晶显示领域所使用封框胶中含有丙烯酰类及环氧基类树脂, 其中 环氧树脂适用于微波加热, 因此微波固化可以替代多数传统的紫外固化和热 固化的封框胶固化方式。 另外, 微波固化适用于目前所有封框胶的材料。
微波辐射固化可以明显加快固化速度,改善固化产物的物理性能,例如, 以 4,4 -二氨基 -二苯基曱烷 ( DDM )为交联剂, 利用微波固化方式制备聚 氨酯 /环氧复合物, 其固化产物的化学结构与传统热固化相同, 但固化效率 大于热固化。用微波辐射 30分钟所得的材料的弹性模量为 l lOlMPa, 而 120 度下热固化需要 6小时才能达到相同性能; 曱基丙烯酸进行微波辐射本体聚 合时, 4~10分钟即可达到高于 90%转化率, 而传统本体聚合要达到相同的转 化率需 3~5小时, 可见, 微波固化可提升产能。
本发明实施例中微波频率例如可以为 2.5GHz,当然可根据实际情况选用 多波长的微波进行固化, 强化固化效果。
由于微波的固化效率是紫外固化和热固化的数倍甚至数十倍, 优选的, 本发明实施例中釆用微波辐射进行封框胶固化时, 将传统固化方式中需要进 行一个小时左右的固化时间缩短为 5分钟左右即可达到同样的固化效果, 并 且由于缩短了固化时间, 可使封框胶在较短的时间内发生化学反应并变为固 态, 减少了液晶与封框胶的接触时间, 降低液晶对封框胶的污染, 改善了传 统工艺中由于液晶污染导致的封框胶固化不良的问题。
釆用本发明实施例提供的微波固化方法, 提高了封框胶固化效率, 减少 了封框胶固化时间, 提高了产能, 并减少了液晶与封框胶的接触时间, 降低 液晶对封框胶的污染, 解决封框胶固化不良的问题。
本发明的实施例还提供了一种封框胶固化装置, 该固化装置内部设置有 微波发生装置, 通过微波固化封框胶。
如图 2所示为本发明实施例提供的新型封框胶固化装置结构示意图, 该 装置主要包括外壳 20、 活动部件 21、 支架 22以及微波发生装置 23。
外壳 20的材料优选能够防止微波外泄的材料, 例如不锈钢等金属材料。 活动部件 21具有开启与关闭两种状态, 并设置于外壳 20之上, 呈关闭 状态的所述活动部件 21与所述外壳 20构成用于容纳设置有待固化封框胶的 基板(例如, 玻璃基板) 的密闭的腔体 24。
支架 22设置于腔体 24中, 用于放置玻璃基板。
微波发生装置 23设置于所述腔体 24中, 用于产生微波, 通过微波对腔 体内玻璃基板的封框胶进行固化。
本发明实施例一中釆用全新的微波固化封框胶方式取代现有的紫外固化 和热固化混合的方式, 使封框胶中的化合物在相同的温度或者更低的温度下 发生化学反应, 提高了固化效率, 节约了生产时间并提高了产能, 且固化效 果优于现有的紫外光照和热固化两种固化方式混合使用的效果, 提高了固化 效果并降低了能耗。
本发明实施例二对实施例一中的新型微波固化封框胶的装置进行详细的 说明, 以形成的腔体为六面体为例进行举例说明, 当然本发明实施例仅作为 一种优选的实施方式, 并不用于限制形成的腔体仅为六面体, 形成的腔体能 够满足基板水平放置, 并且微波垂直照射玻璃基板即可。
具有开启与关闭两种状态的活动部件 21设置于所述六面体的侧面,处于 开启状态时,可以作为玻璃基板进出腔体 24的入口和出口,关闭状态时则可 以使腔体处于密闭状态, 防止微波外泄。
例如, 根据实际的生产线操作, 上述活动部件可以设置两个, 并设置在 不同的侧面,分别作为玻璃基板进出腔体 24的入口和出口,也可以只设置一 个同时作为入口和出口。
例如,活动部件 21作为玻璃基板的入口和出口,该入口和出口的高度与 所述玻璃基板的厚度相匹配, 所述入口和出口的宽度与所述玻璃基板进出所 述腔体的宽度相匹配, 使玻璃基板可以随意进出腔体而不被损坏。 根据各公 司生产线的实际情况, 入口和出口的设置位置可以灵活调整, 并且大小与玻 璃基板的厚度和进入装置时的宽度(即, 沿基板所在平面内与基板的行进方 向垂直的方向上的尺寸)相匹配, 本实施例中以入口位置为例进行说明。 固 化装置体积一定时, 生产线中可能出现以下两种放入玻璃基板的方式:
第一种情况: 沿着边长 1300mm的方向将玻璃基板放入固化装置中, 因 此, 入口只能出现在固化装置中边长相对较短的一个侧面如图 3A所示, 并 且入口的宽度为 1100mm, 高度为玻璃基板的厚度, 图中 31为玻璃基板, 32 为机械手, 33为入口, 34为玻璃基板固化位置。 其中, 机械手 32用于移动 需要固化封框胶的玻璃基板,将玻璃基板从固化装置外部通过入口 33移动到 固化装置中的玻璃基板固化位置 34。
第二种情况: 沿着边长 1100mm的方向将玻璃基板放入固化装置中, 此 时, 入口只能出现在固化装置中的长边侧面如图 3B 所示, 入口的宽度为 1300mm。
本发明实施例中设置的上述活动部件不仅可以作为玻璃基板进出固化装 置腔体的入口和出口, 在关闭状态时还可以对腔体起到密闭的作用。
本发明实施例中微波发生装置釆用具有微波发射功能的磁控管进行微波 发射, 出于玻璃基板需水平放置的考虑,并能很好的利用微波进行固化处理, 本发明实施例中, 在六面体的顶面和 /或底面内壁上可以设置多个磁控管, 使 磁控管发射的微波垂直照射在腔体内水平放置的玻璃基板。
优选的, 顶面与底面内壁分布的多个磁控管, 任意两个相邻的磁控管平 行且等间距分布,为了达到更好的固化效果,顶面分布的磁控管 41与底面分 布的磁控管 41在分布位置上也是两两相对应的,向需要封框胶固化的玻璃基 板位置发射电磁波 42。如图 4所示为本发明实施例提供的封框胶固化装置的 侧视截面示意图。
本发明的上述实施例利用微波的加热速度快、 温度均匀和无滞后效应等 特点, 在封框胶固化装置中将传统的紫外固化装置撤除, 替换为新的微波固 化装置, 并且釆用能发射微波的磁控管设置于内壁, 本发明实施例提供的微 波固化装置的体积较紫外固化装置要小。 出于实际工艺考虑, 例如机械手的 位置, 将新的固化装置高度设置为 1.5米, 而传统的紫外固化装置一般在 4m 左右。 进一步的, 将新的固化装置高度设置为 1.5米可保证放置 5张玻璃基 板的高度, 可以同时进行多张玻璃基板的固化, 并且固化时间相差不多, 不 会影响固化效果, 并节约了空间和成本。
本发明实施例提供的微波固化装置的腔体 24 中设置的用于放置玻璃基 板的支架,可设置于六面体不具有所述活动部件 21的两个相对的侧面的内壁 上, 并且两个侧面内壁上设置的支架位置在高度方向上——对应, 保证玻璃 基板水平放置在支架上, 并使顶面与底面磁控管发射的微波能垂直照射所述 玻璃基板。
釆用本发明实施例提供的微波封框胶固化装置, 由于微波的固化效率是 紫外固化和热固化的数倍甚至数十倍, 传统工艺中固化的时间一般需要一个 小时左右, 因此, 釆用本发明实施例的微波固化装置进行封框胶固化时, 可 将固化时间缩短为 5分钟左右。 优选的, 为避免等待时间, 将固化时间控制 为不大于 5分钟的范围, 相邻两张玻璃基板的放入固化装置腔体的间隔为 5 分钟以上。 通过本发明, 减少了液晶与封框胶共混污染的时间, 避免了其他 条件的干扰, 使得封框胶固化更完全, 可解决传统工艺中的固化不良。
以上所述仅是本发明的示范性实施方式, 而非用于限制本发明的保护范 围, 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
I、 一种封框胶固化方法, 包括:
通过微波固化所述封框胶。
2、 根据权利要求 1 所述的封框胶固化方法, 其中, 所述微波的频率为
2.5GHz。
3、根据权利要求 1或 2所述的封框胶固化方法, 其中, 通过微波固化所 述封框胶的时间大致为 5分钟。
4、 根据权利要求 1-3中任一项所述的封框胶固化方法, 其中, 所述封框 胶用于连接液晶显示面板中的阵列基板和彩膜基板。
5、 一种封框胶微波固化装置, 包括:
外壳;
设置于所述外壳上具有开启与关闭两种状态的活动部件, 且呈关闭状态 的所述活动部件与所述外壳构成用于容纳设置有待固化封框胶的基板的密闭 腔体;
设置于所述腔体内用于放置所述基板的支架; 以及
设置于所述腔体内的微波发生装置。
6、 如权利要求 5所述的装置, 其中, 所述腔体为六面体。
7、如权利要求 6所述的装置, 其中, 所述活动部件设置于所述六面体的 侧面, 呈开启状态时作为所述基板进出所述腔体的入口和出口。
8、如权利要求 7所述的装置, 其中, 所述入口和出口的高度与所述基板 的厚度相匹配, 所述入口和出口的宽度与所述玻璃基板进出所述腔体的宽度 相匹配。
9、 如权利要求 6-8中任一项所述的装置, 其中, 所述微波发生装置包括 分布于所述六面体顶面和 /或底面的内壁上的具有微波发射功能的多个磁控 管, 所述顶面和 /或底面的内壁上的所述磁控管平行且等间距分布。
10、 如权利要求 6-8中任一项所述的装置, 其中, 所述支架设置于所述 六面体不具有所述活动部件的两个相对的侧面的内壁上。
I I、如权利要求 10所述的装置, 其中, 两个所述侧面的内壁上设置支架 的位置在所述外壳的高度方向上——对应。 12、 如权利要求 5-11中任一项所述的装置 其中, 所述外壳的材质为不 锈钢金属材料。
13、 如权利要求 5-12中任一项所述的装置 其中, 所述装置用于实施如 权利要求 1-4中任一项所述的封框胶固化方法。
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