WO2014189243A1 - Method for manufacturing adhesive sheet for display device - Google Patents

Method for manufacturing adhesive sheet for display device Download PDF

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Publication number
WO2014189243A1
WO2014189243A1 PCT/KR2014/004466 KR2014004466W WO2014189243A1 WO 2014189243 A1 WO2014189243 A1 WO 2014189243A1 KR 2014004466 W KR2014004466 W KR 2014004466W WO 2014189243 A1 WO2014189243 A1 WO 2014189243A1
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WO
WIPO (PCT)
Prior art keywords
adhesive tape
adhesive
adhesive sheet
main film
display device
Prior art date
Application number
PCT/KR2014/004466
Other languages
French (fr)
Korean (ko)
Inventor
김인석
고형진
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(주)지우전자
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Publication of WO2014189243A1 publication Critical patent/WO2014189243A1/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • 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
    • G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/255—Polyesters
    • 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
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • 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
    • G02F1/1313—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 specially adapted for a particular application
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present invention relates to a method for manufacturing an adhesive sheet for a display device, in particular, to maximize the use efficiency of raw materials by minimizing the loss of the adhesive tape in the adhesive sheet manufacturing process, while minimizing the release force during scrap removal of the adhesive tape to display a large area
  • the present invention relates to a method for producing an adhesive sheet for a display device suitable for manufacturing a device.
  • a display device using liquid crystal includes a backlight unit 30 including a light guide plate 31, a reflection plate 35, and a plurality of optical sheets 33, and a flexible circuit board 50. ), A liquid crystal panel 40, and an adhesive sheet 10 for adhering the optical sheet 33 and the liquid crystal panel 40.
  • the adhesive sheet 10 is provided in a rectangular frame shape.
  • a step of laminating the main film 11 and the adhesive tape 15 and a press is performed.
  • Step b of forming a cutting line (19a) for separating the scrap region (S1) in the center of the adhesive tape 15 through the step c, step c of removing the scrap region (S1) in the center, the cover film 13 It is produced through the step d of laminating, the step e of forming a cutting line 19b for distinguishing the outer scrap region S2, and the step f of removing the outer scrap region S2.
  • the conventional adhesive sheet manufacturing method because it removes the center of the scrap area occupying the largest area in the adhesive tape, the loss portion that is discarded after processing in the raw material (adhesive tape) ( The center scrap area) has too many problems. As a result, the raw material use efficiency is extremely low, as well as the manufacturing cost has a problem.
  • the center scrap area is not easily separated in the process of removing the scrap region, which is not suitable for manufacturing a large-size liquid crystal panel adhesive sheet.
  • an object of the present invention is to provide a method for manufacturing an adhesive sheet for a display device which can improve raw material use efficiency and reduce manufacturing costs by minimizing the amount of adhesive tape discarded in the adhesive sheet manufacturing process.
  • the object is, according to an embodiment of the present invention, in the adhesive sheet manufacturing method for adhering the backlight unit and the liquid crystal panel of the display device, the first adhesive tape to the main film in a sequential interval set in the first direction Attaching with; Attaching second adhesive tapes to both ends of the first adhesive tape in a second direction in a horizontal direction of the first direction to form a rectangular frame shape; Making an adhesive sheet by laminating a cover film on top of the first adhesive tape and the second adhesive tape; Forming a dividing line for dividing the scrap portion in the adhesive sheet; Removing the scrap portion; is achieved by a method for manufacturing an adhesive sheet for a display device comprising a.
  • the attaching of the first adhesive tape may be performed by intermittently cutting the first adhesive tape wound on the roll in the first direction, which is a transverse direction of the transport direction of the main film wound on the roll, to the main film. Attaching; Forming a first cutting line for dividing a first scrap region on the first adhesive tape; And removing the first scrap region.
  • the step of intermittently cutting the first adhesive tape and attaching the main film to the main film may include uniformly transferring the main film at a set speed, and transferring the first adhesive tape to the upper part of the main film by a predetermined thickness. Stopping; Cutting the first adhesive tape using a cutter and attaching the first adhesive tape to the main film; And stopping the transfer of the first adhesive tape by the separation interval.
  • the second adhesive tape wound on the roll may be attached to the main film in the second direction, which is a conveying direction of the main film, along each end of the first adhesive tape. Attaching; Forming a second cutting line for dividing a second scrap region on the second adhesive tape; And removing the second scrap region.
  • the removing of the second scrap region and laminating the cover film may be performed at the same time.
  • the main film and the cover film may be made of polyethylene terephthalate (PET) material.
  • PET polyethylene terephthalate
  • the release force is reduced when removing the scrap region is suitable for the manufacture of a large area display device.
  • FIG. 1 is an exploded perspective view of main parts of a display device
  • FIG. 4 is a perspective view of the adhesive sheet prepared according to the process diagram shown in FIG.
  • FIG. 5 is a flowchart of a method of manufacturing an adhesive sheet for a display device according to another embodiment of the present invention.
  • Adhesive sheet for a display device in the adhesive sheet manufacturing method for bonding the backlight unit and the liquid crystal panel of the display device, the first adhesive tape 151 to the main film 110 Attaching sequentially to form a spaced interval d set in a first direction (S10), and a second adhesive tape 155 in a second direction in a horizontal direction of the first direction to both ends of the first adhesive tape 151; Attaching the cover film 130 to an upper portion of the step S20 and the first adhesive tape 151 and the second adhesive tape 155 to attach the cover film 130 to form a rectangular sheet shape (S20). S30, and forming a dividing line 159 for dividing the scrap portion (C3) on the adhesive sheet 100 (S40), and removing the scrap portion (C3) (S50).
  • the main film 110 is wound on a roll (not shown) and is constantly transported at a set speed.
  • the first adhesive tape 151 is also wound on a roll and transported in the same direction as the main film 110.
  • the first adhesive tape 151 is conveyed in the form of the original fabric as shown in FIG. 2A, but is intermittently cut by a cutter (not shown) adjacent to the main film 110, and FIG. In the form of
  • the forming order of the first adhesive tape 151 or the second adhesive tape 155 may be changed.
  • the second adhesive tape 155 in the second direction that is the same as the transfer direction may be formed in the main film.
  • the first adhesive tape 151 in the first direction may be attached later, after first attaching to 110.
  • the first adhesive tape 151 wound on the roll in the first direction which is the horizontal direction of the transport direction of the main film 110 wound on the roll, Intermittently cut to attach to the main film (S10).
  • the main film 110 is transported at a set uniform speed, but after the first adhesive tape 151 is cut, the main film 110 is transported by the thickness t of FIG. The cutting process is repeated again after the transfer is stopped until 110 is transferred by the interval d.
  • the interval d is provided corresponding to the length between each side of the adhesive sheet 100 shown in FIG.
  • the first cutting line 153 may be set in various ways according to the size and shape of the region to be scraped, and is generally formed by pressing.
  • step (S20) of attaching the second adhesive tape 155 it is wound on the roll in the second direction, which is the conveying direction of the main film 110, along each end of the first adhesive tape 151.
  • the second adhesive tape 155 is attached to the main film 110 (S20).
  • the first adhesive tape 151 and the second adhesive tape 155 form a rectangular frame as a whole.
  • the second adhesive tape 155 may be unwound and transported by two rolls spaced apart by the horizontal length of the first adhesive tape 151 to be bonded.
  • additional cutting may be performed in the second scrap operation without additional cutting operations, or may be attached through intermittent cutting such as the first adhesive tape 151 attachment process. May be
  • Forming a second cutting line 157 for dividing the second scrap region C2 on the second adhesive tape 155 and removing the second scrap region C2 (S22). It may include.
  • Removing the second scrap region C2 (S22) and laminating the cover film 130 (S30) may be performed at the same time.
  • the secondary scrap processes S21 and S22 may be omitted and may be performed at once in the removal process of the scrap part C3.
  • the secondary scrap process scrapes the inner surface of the adhesive tape (151, 155) forming each side in the adhesive sheet () of Figure 4,
  • the scrap portion (C3) process is the adhesive tape 151 , 155 may be divided into a process of scraping the outer surface, the inner side and the outer side of the adhesive tape (151, 155) may be scraped at the same time, but if the thickness of the adhesive tape (151, 155) is thinner inside and outside Failure due to simultaneous scraping may occur.
  • the secondary and tertiary scraps are simultaneously performed. It is preferable to perform the car scrap process and the scrap part removal process separately.
  • the cover film 130 is laminated on the first adhesive tape 151 and the second adhesive tape 155 to form an adhesive sheet 100, and an adhesive sheet.
  • To complete the adhesive sheet 100 as shown in FIG.
  • each corner of the first adhesive part 151 and the second adhesive part 155 may have cutouts 152 and 156 having approximately “Z” shapes cut in corresponding shapes. This is to prevent light leakage from the backlight unit 30.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

The present invention relates to a method for manufacturing an adhesive sheet for a display device. In particular, disclosed is a method for manufacturing an adhesive sheet for bonding a backlight unit and a liquid crystal panel of a display device, comprising the steps of: sequentially attaching first adhesive tapes, to be separated at predetermined intervals, on a main film in the first direction; attaching second adhesive tapes on both ends of the first adhesive tapes in the second direction which crisscrosses the first direction so as to form the shape of a quadrangular frame; producing an adhesive sheet by laminating a cover film on the upper portions of the first adhesive tapes and the second adhesive tapes; forming a dividing line, on the adhesive sheet, for distinguishing a scrap part; and removing the scrap part. According to the present invention, it is possible to minimize the amount of the adhesive tape which is wasted during the process of manufacturing the adhesive sheet, thereby improving efficiency in using raw materials and reducing the manufacturing costs. In addition, since the release force can be reduced at the time of removing the scrap region by minimizing the size of the scrap region to be removed, the present invention is suitable for manufacture of a large-area display device.

Description

디스플레이장치용 접착시트 제조방법Manufacturing method of adhesive sheet for display device
본 발명은 디스플레이장치용 접착시트 제조방법에 관한 것으로, 특히, 접착시트 제조공정에서 접착테이프의 손실을 최소화하여 원자재 사용효율을 극대화하는 한편, 접착테이프의 스크랩 제거시 이형력을 최소화하여 대면적 디스플레이장치의 제조에 적합한 디스플레이장치용 접착시트 제조방법에 관한 것이다. The present invention relates to a method for manufacturing an adhesive sheet for a display device, in particular, to maximize the use efficiency of raw materials by minimizing the loss of the adhesive tape in the adhesive sheet manufacturing process, while minimizing the release force during scrap removal of the adhesive tape to display a large area The present invention relates to a method for producing an adhesive sheet for a display device suitable for manufacturing a device.
일반적으로, 액정을 이용한 디스플레이장치는, 도 1에 도시된 바와 같이, 도광판(31), 반사판(35) 및 다수의 광학시트(33)를 포함하는 백라이트유닛(30)과, 연성회로기판(50)과, 액정패널(40)과, 광학시트(33)와 액정패널(40)을 접착하는 접착시트(10)를 포함한다. In general, as shown in FIG. 1, a display device using liquid crystal includes a backlight unit 30 including a light guide plate 31, a reflection plate 35, and a plurality of optical sheets 33, and a flexible circuit board 50. ), A liquid crystal panel 40, and an adhesive sheet 10 for adhering the optical sheet 33 and the liquid crystal panel 40.
이러한 상기 접착시트(10)는, 도 1에 도시된 바와 같이, 사각틀 형상으로 마련되는 바, 도 2를 참조하면, 메인필름(11)과, 접착테이프(15)를 합지하는 a단계와, 프레스를 통하여 접착테이프(15)의 중앙의 스크랩영역(S1)을 구분하기 위한 절단선(19a)을 형성하는 b단계와, 중앙의 스크랩영역(S1)을 제거하는 c단계와, 커버필름(13)을 합지하는 d단계와, 외곽 스크랩영역(S2)을 구분하기 위한 절단선(19b)을 형성하는 e단계와, 외곽 스크랩영역(S2)을 제거하는 f단계를 통하여 제작된다. As shown in FIG. 1, the adhesive sheet 10 is provided in a rectangular frame shape. Referring to FIG. 2, a step of laminating the main film 11 and the adhesive tape 15 and a press is performed. Step b of forming a cutting line (19a) for separating the scrap region (S1) in the center of the adhesive tape 15 through the step c, step c of removing the scrap region (S1) in the center, the cover film 13 It is produced through the step d of laminating, the step e of forming a cutting line 19b for distinguishing the outer scrap region S2, and the step f of removing the outer scrap region S2.
상기와 같은, 종래의 접착시트 제조방법은, 도 2에 도시된 바와 같이, 접착테이프에서 가장 큰 면적을 차지하는 중앙의 스크랩영역을 제거하기 때문에, 원자재(접착테이프)에서 공정 후 버려지는 손실부분(중앙 스크랩영역)이 너무 많은 문제점이 있었다. 이로 인해, 원자재 사용효율이 극히 낮은 것은 물론, 제조원가가 상승하는 문제점이 있었다. As described above, the conventional adhesive sheet manufacturing method, as shown in Figure 2, because it removes the center of the scrap area occupying the largest area in the adhesive tape, the loss portion that is discarded after processing in the raw material (adhesive tape) ( The center scrap area) has too many problems. As a result, the raw material use efficiency is extremely low, as well as the manufacturing cost has a problem.
이는, 최근 디스플레이장치의 대형화에 따라 더욱 심각한 문제를 야기하여, 액정패널이 커질수록 사용효율이 더욱 악화되는 문제점이 있었다. This causes a more serious problem in accordance with the recent increase in the size of the display device, and the larger the liquid crystal panel, the worse the use efficiency.
나아가, 중앙의 스크랩영역은 면적에 비례하여 접착력이 커지기 때문에, 이를 제거하는 과정에서 분리가 용이하지 않으므로, 대형의 액정패널용 접착시트 제조에는 적합하지 않은 문제점이 있었다. Furthermore, since the adhesive force increases in proportion to the area, the center scrap area is not easily separated in the process of removing the scrap region, which is not suitable for manufacturing a large-size liquid crystal panel adhesive sheet.
따라서, 본 발명의 목적은, 접착시트 제조공정에서 버려지는 접착테이프의 양을 최소화함으로써 원자재 사용효율을 향상시키고, 제조원가를 절감할 수 있는 디스플레이장치용 접착시트 제조방법을 제공하는 데 있다. Accordingly, an object of the present invention is to provide a method for manufacturing an adhesive sheet for a display device which can improve raw material use efficiency and reduce manufacturing costs by minimizing the amount of adhesive tape discarded in the adhesive sheet manufacturing process.
또한, 본 발명의 목적은, 제거되는 스크랩영역의 크기를 최소화함으로써 스크랩영역 제거시 이형력을 감소시켜 대면적 디스플레이장치의 제조에 적합한 디스플레이장치용 접착시트 제조방법을 제공하는 데 있다. It is also an object of the present invention to provide a method for manufacturing an adhesive sheet for a display device suitable for manufacturing a large area display device by reducing the release force when removing the scrap area by minimizing the size of the scrap area to be removed.
상기 목적은, 본 발명의 일실시예에 따라, 디스플레이장치의 백라이트유닛과 액정패널을 접착하기 위한 접착시트 제조방법에 있어서, 메인필름에 제1접착테이프를 제1방향으로 설정된 이격간격을 이루며 순차적으로 부착하는 단계와; 상기 제1접착테이프의 양단에 상기 제1방향의 가로방향인 제2방향으로 제2접착테이프를 부착하여 사각틀 형상을 이루도록 하는 단계와; 상기 제1접착테이프 및 제2접착테이프의 상부로 커버필름을 합지하여 접착시트를 만드는 단계와; 상기 접착시트에 스크랩부를 구분하기 위한 구분선을 형성하는 단계와; 상기 스크랩부를 제거하는 단계;를 포함하는 디스플레이장치용 접착시트 제조방법에 의해 달성된다. The object is, according to an embodiment of the present invention, in the adhesive sheet manufacturing method for adhering the backlight unit and the liquid crystal panel of the display device, the first adhesive tape to the main film in a sequential interval set in the first direction Attaching with; Attaching second adhesive tapes to both ends of the first adhesive tape in a second direction in a horizontal direction of the first direction to form a rectangular frame shape; Making an adhesive sheet by laminating a cover film on top of the first adhesive tape and the second adhesive tape; Forming a dividing line for dividing the scrap portion in the adhesive sheet; Removing the scrap portion; is achieved by a method for manufacturing an adhesive sheet for a display device comprising a.
여기서, 상기 제1접착테이프를 부착하는 단계는, 롤에 감겨진 메인필름의 이송방향의 가로방향인 상기 제1방향으로, 롤에 감겨진 상기 제1접착테이프를 단속적으로 절단하여 상기 메인필름에 부착하는 단계와; 상기 제1접착테이프에 제1스크랩영역을 구분하기 위한 제1절단선을 형성하는 단계와; 상기 제1스크랩영역을 제거하는 단계;를 포함할 수 있다. The attaching of the first adhesive tape may be performed by intermittently cutting the first adhesive tape wound on the roll in the first direction, which is a transverse direction of the transport direction of the main film wound on the roll, to the main film. Attaching; Forming a first cutting line for dividing a first scrap region on the first adhesive tape; And removing the first scrap region.
상기 제1접착테이프를 단속적으로 절단하여 상기 메인필름에 부착하는 단계는, 상기 메인필름을 설정 속도로 균일하게 이송하는 단계와, 상기 제1접착테이프를 설정 두께만큼 상기 메인필름 상부로 이송시킨 후 정지하는 단계와; 커터를 이용하여 상기 제1접착테이프를 절단하여 상기 메인필름에 부착하는 단계와; 상기 이격간격 만큼 상기 제1접착테이프의 이송을 정지하는 단계;를 포함할 수 있다. The step of intermittently cutting the first adhesive tape and attaching the main film to the main film may include uniformly transferring the main film at a set speed, and transferring the first adhesive tape to the upper part of the main film by a predetermined thickness. Stopping; Cutting the first adhesive tape using a cutter and attaching the first adhesive tape to the main film; And stopping the transfer of the first adhesive tape by the separation interval.
한편, 상기 제2접착테이프를 부착하는 단계는, 상기 제1접착테이프의 각 양단을 따라 상기 메인필름의 이송방향인 상기 제2방향으로, 롤에 감겨진 상기 제2접착테이프를 상기 메인필름에 부착하는 단계와; 상기 제2접착테이프에 제2스크랩영역을 구분하기 위한 제2절단선을 형성하는 단계와; 상기 제2스크랩영역을 제거하는 단계;를 포함할 수 있다. Meanwhile, in the attaching of the second adhesive tape, the second adhesive tape wound on the roll may be attached to the main film in the second direction, which is a conveying direction of the main film, along each end of the first adhesive tape. Attaching; Forming a second cutting line for dividing a second scrap region on the second adhesive tape; And removing the second scrap region.
여기서, 상기 제2스크랩영역을 제거하는 단계와, 상기 커버필름을 합지하는 단계는 동시에 수행될 수 있다. The removing of the second scrap region and laminating the cover film may be performed at the same time.
상기 메인필름 및 커버필름은 폴리에틸렌 테레프탈레이트(PET) 재질로 마련될 수 있다. The main film and the cover film may be made of polyethylene terephthalate (PET) material.
상기 방법에 따른 디스플레이장치용 접착시트 제조방법에 따르면, 접착시트 제조공정에서 버려지는 접착테이프의 양을 최소화함으로써 원자재 사용효율을 향상시키고, 제조원가를 절감할 수 있다. According to the method for manufacturing an adhesive sheet for a display device according to the above method, by minimizing the amount of the adhesive tape discarded in the adhesive sheet manufacturing process, it is possible to improve the raw material use efficiency and reduce the manufacturing cost.
또한, 제거되는 스크랩영역의 크기를 최소화함으로써 스크랩영역 제거시 이형력을 감소시켜 대면적 디스플레이장치의 제조에 적합하다. In addition, by minimizing the size of the scrap region to be removed, the release force is reduced when removing the scrap region is suitable for the manufacture of a large area display device.
도 1은 디스플레이장치의 요부 분해 사시도, 1 is an exploded perspective view of main parts of a display device;
도 2는 종래 디스플레이장치용 접착시트의 제조 공정도, 2 is a manufacturing process of the adhesive sheet for a conventional display device,
도 3은 본 발명의 일실시예에 따른 디스플레이장치용 접착시트의 제조 공정도, 3 is a manufacturing process of the adhesive sheet for a display device according to an embodiment of the present invention,
도 4는 도 3에 도시된 공정도에 따라 제조된 접착시트의 사시도, 4 is a perspective view of the adhesive sheet prepared according to the process diagram shown in FIG.
도 5는 본 발명의 다른 실시예에 따른 디스플레이장치용 접착시트 제조방법의 흐름도이다. 5 is a flowchart of a method of manufacturing an adhesive sheet for a display device according to another embodiment of the present invention.
이하, 첨부된 도면을 참조하여, 본 발명의 일실시예를 상세히 설명한다. Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention will be described in detail.
본 발명의 일실시예에 따른 디스플레이장치용 접착시트 제조방법은, 디스플레이장치의 백라이트유닛과 액정패널을 접착하기 위한 접착시트 제조방법에 있어서, 메인필름(110)에 제1접착테이프(151)를 제1방향으로 설정된 이격간격(d)을 이루며 순차적으로 부착하는 단계(S10)와, 제1접착테이프(151)의 양단에 상기 제1방향의 가로방향인 제2방향으로 제2접착테이프(155)를 부착하여 사각틀 형상을 이루도록 하는 단계와(S20), 제1접착테이프(151) 및 제2접착테이프(155)의 상부로 커버필름(130)을 합지하여 접착시트(100)를 만드는 단계(S30)와, 접착시트(100)에 스크랩부(C3)를 구분하기 위한 구분선(159)을 형성하는 단계(S40)와, 스크랩부(C3)를 제거하는 단계(S50)를 포함한다. Adhesive sheet for a display device according to an embodiment of the present invention, in the adhesive sheet manufacturing method for bonding the backlight unit and the liquid crystal panel of the display device, the first adhesive tape 151 to the main film 110 Attaching sequentially to form a spaced interval d set in a first direction (S10), and a second adhesive tape 155 in a second direction in a horizontal direction of the first direction to both ends of the first adhesive tape 151; Attaching the cover film 130 to an upper portion of the step S20 and the first adhesive tape 151 and the second adhesive tape 155 to attach the cover film 130 to form a rectangular sheet shape (S20). S30, and forming a dividing line 159 for dividing the scrap portion (C3) on the adhesive sheet 100 (S40), and removing the scrap portion (C3) (S50).
도 3 및 도 5를 참조하여 구체적으로 설명한다. This will be described in detail with reference to FIGS. 3 and 5.
메인필름(110)은 롤(미도시)에 감겨져 설정된 속도로 일정하게 이송되며, 제1접착테이프(151) 또한 롤에 감겨져 메인필름(110)과 같은 방향으로 이송된다. The main film 110 is wound on a roll (not shown) and is constantly transported at a set speed. The first adhesive tape 151 is also wound on a roll and transported in the same direction as the main film 110.
제1접착테이프(151)는 도 2의 (a)에 도시된 것과 같은 원단형태로 이송되지만, 메인필름(110)에 인접하여서는 커터(미도시)에 의해 단속적으로 절단되어 도 3의 (a)와 같은 형태로 합지된다. The first adhesive tape 151 is conveyed in the form of the original fabric as shown in FIG. 2A, but is intermittently cut by a cutter (not shown) adjacent to the main film 110, and FIG. In the form of
도 3의 (a)에서는 커터의 방향이 이송방향의 수직하여 커팅을 수행하므로, 제1접착테이프(151)가 제1방향으로 형성되는 것이다. In FIG. 3A, since the cutter is cut in a vertical direction in the feed direction, the first adhesive tape 151 is formed in the first direction.
여기서, 제1접착테이프(151) 또는 제2접착테이프(155)의 형성순서는 변경이 가능하며, 예를 들어, 상기 이송방향과 동일한 제2방향의 제2접착테이프(155)를 메인필름(110)에 먼저 부착한 후에 제1방향의 제1접착테이프(151)를 나중에 부착할 수도 있다. Here, the forming order of the first adhesive tape 151 or the second adhesive tape 155 may be changed. For example, the second adhesive tape 155 in the second direction that is the same as the transfer direction may be formed in the main film. The first adhesive tape 151 in the first direction may be attached later, after first attaching to 110.
제1접착테이프(151)의 부착단계를 좀더 구체적으로 설명하면, 롤에 감겨진 메인필름(110)의 이송방향의 가로방향인 상기 제1방향으로, 롤에 감겨진 제1접착테이프(151)를 단속적으로 절단하여 메인필름에 부착한다(S10). Referring to the attaching step of the first adhesive tape 151 in more detail, the first adhesive tape 151 wound on the roll in the first direction, which is the horizontal direction of the transport direction of the main film 110 wound on the roll, Intermittently cut to attach to the main film (S10).
즉, 메인필름(110)은 설정된 균일한 속도로 이송이 진행되나, 제1접착테이프(151)는 커팅이 된 후에 도 3 (a)의 두께 t 만큼 이송을 진행하고 다시 커팅된 후에, 메인필름(110)이 간격 d 만큼 이송될때 까지 이송이 정지된 후에 다시 커팅이 진행되는 단계를 반복하는 것이다. 상기 간격 d는 도 4에 도시된 접착시트(100)의 각 변 사이의 길이에 대응하게 마련된다. That is, the main film 110 is transported at a set uniform speed, but after the first adhesive tape 151 is cut, the main film 110 is transported by the thickness t of FIG. The cutting process is repeated again after the transfer is stopped until 110 is transferred by the interval d. The interval d is provided corresponding to the length between each side of the adhesive sheet 100 shown in FIG.
다음, 도 3의 (b)에 도시된 바와 같이, 부착된 제1접착테이프(151)에 제1스크랩영역(C1)을 구분하기 위한 제1절단선(153)을 형성한 후에(S11), 제1스크랩영역(C1)을 제거하는 단계(S12)를 포함한다.Next, as shown in (b) of FIG. 3, after forming the first cutting line 153 for dividing the first scrap region C1 in the first adhesive tape 151 attached (S11), And removing the first scrap region C1 (S12).
상기 제1절단선(153)은 스크랩되는 영역의 크기 및 모양에 따라 다양하게 설정될 수 있으며, 일반적으로 프레스작업을 통하여 형성한다. The first cutting line 153 may be set in various ways according to the size and shape of the region to be scraped, and is generally formed by pressing.
제2접착테이프(155)를 부착하는 단계(S20)를 구체적으로 설명하면, 제1접착테이프(151)의 각 양단을 따라 메인필름(110)의 이송방향인 상기 제2방향으로, 롤에 감겨진 제2접착테이프(155)를 메인필름(110)에 부착한다(S20). Referring to the step (S20) of attaching the second adhesive tape 155 in detail, it is wound on the roll in the second direction, which is the conveying direction of the main film 110, along each end of the first adhesive tape 151. The second adhesive tape 155 is attached to the main film 110 (S20).
이에 의해, 제1접착테이프(151) 및 제2접착테이프(155)는 전체적으로 사각틀 형상을 이루게 된다. As a result, the first adhesive tape 151 and the second adhesive tape 155 form a rectangular frame as a whole.
따라서, 종래 접착시트 제조공정과 달리 중앙의 스크랩영역에 대한 손실이 없고 각 접착테이프(151, 155)에서 소정 부분만을 스크랩하면 되므로 원자재 사용효율을 극대화할 수 있다. Therefore, unlike the conventional adhesive sheet manufacturing process, there is no loss to the center scrap area, and only a predetermined portion of each adhesive tape 151 and 155 may be scraped, thereby maximizing raw material usage efficiency.
또한, 각 접착테이프에서 스크랩되는 부분의 면적이 작으므로 이형력이 작아 대면적의 디스플레이장치용 접착시트의 제조에도 적합하다. In addition, since the area of the scraped portion of each adhesive tape is small, the release force is small, which is suitable for the manufacture of a large-area adhesive sheet for display apparatus.
이 경우, 제2접착테이프(155)는 제1접착테이프(151)의 가로길이만큼 이격된 2개의 롤에 의해 풀려져 이송되어 접착될 수 있다. In this case, the second adhesive tape 155 may be unwound and transported by two rolls spaced apart by the horizontal length of the first adhesive tape 151 to be bonded.
제2접착테이프(155)를 부착할 때에는 별도의 커팅작업이 수행되지 않고 2차 스크랩작업에서 추가 스크랩이 수행될 수도 있고, 또는 제1접착테이프(151) 부착공정과 같이 단속적인 커팅을 통하여 부착될 수도 있다. When the second adhesive tape 155 is attached, additional cutting may be performed in the second scrap operation without additional cutting operations, or may be attached through intermittent cutting such as the first adhesive tape 151 attachment process. May be
다음. 제2접착테이프(155)에 제2스크랩영역(C2)을 구분하기 위한 제2절단선(157)을 형성하는 단계(S21)와, 제2스크랩영역(C2)을 제거하는 단계(S22)를 포함할 수 있다. next. Forming a second cutting line 157 for dividing the second scrap region C2 on the second adhesive tape 155 and removing the second scrap region C2 (S22). It may include.
제2스크랩영역(C2)을 제거하는 단계(S22)와, 커버필름(130)을 합지하는 단계(S30)는 동시에 수행될 수 있다. Removing the second scrap region C2 (S22) and laminating the cover film 130 (S30) may be performed at the same time.
여기서, 2차 스크랩공정(S21, S22)은 생략되고 스크랩부(C3)의 제거공정에서 한번에 수행될 수도 있다. Here, the secondary scrap processes S21 and S22 may be omitted and may be performed at once in the removal process of the scrap part C3.
이는, 2차 스크랩공정(S21, S22)은, 도 4의 접착시트()에서 각 변을 이루는 접착테이프(151, 155)의 내측면을 스크랩하고, 스크랩부(C3) 공정은 접착테이프(151, 155)의 외측면을 스크랩하는 공정으로 나뉠 수 있는 바, 접착테이프(151, 155) 측면에서는 내측과 외측을 동시에 스크랩할 수도 있으나, 접착테이프(151, 155)의 두께가 얇은 경우에는 내외측 동시 스크랩에 따른 불량이 발생할 수 있다. This, the secondary scrap process (S21, S22), scrapes the inner surface of the adhesive tape (151, 155) forming each side in the adhesive sheet () of Figure 4, the scrap portion (C3) process is the adhesive tape 151 , 155 may be divided into a process of scraping the outer surface, the inner side and the outer side of the adhesive tape (151, 155) may be scraped at the same time, but if the thickness of the adhesive tape (151, 155) is thinner inside and outside Failure due to simultaneous scraping may occur.
따라서, 접착테이프(151, 155)의 두께가 적정 두께 이상인 경우에는 2차 스크랩과 3차 스크랩(스크랩부 제거)를 동시에 수행하고, 접착테이프(151, 155)의 두께가 적정 두께 이하인 경우에는 2차 스크랩 공정과 스크랩부 제거공정을 분리하여 수행하는 것이 바람직하다. Therefore, when the thicknesses of the adhesive tapes 151 and 155 are greater than or equal to the appropriate thicknesses, the secondary and tertiary scraps (removal of scraps) are simultaneously performed. It is preferable to perform the car scrap process and the scrap part removal process separately.
이후, 도 3의 (e)에 도시된 바와 같이, 제1접착테이프(151) 및 제2접착테이프(155)의 상부로 커버필름(130)을 합지하여 접착시트(100)를 만들며, 접착시트(100)의 최종형상에 맞추어 제거될 스크랩부(C3)를 구분하기 위한 구분선(159)을 형성하고(S40, (f)참조)), 스크랩부(C3)를 제거(S50, (g)참조)하여 도 4에 도시된 바와 같은, 접착시트(100)를 완성한다. Thereafter, as shown in FIG. 3E, the cover film 130 is laminated on the first adhesive tape 151 and the second adhesive tape 155 to form an adhesive sheet 100, and an adhesive sheet. Forming a dividing line 159 for dividing the scrap portion C3 to be removed in accordance with the final shape of (100) (see S40, (f)), and removing the scrap portion C3 (see S50, (g)). ) To complete the adhesive sheet 100, as shown in FIG.
도 4에서, 제1접착부(151) 및 제2접착부(155)의 각 모서리는 상호 대응하는 모양으로 절개된 대략 "Z"자 형상의 절개부(152, 156)를 갖도록 할 수 있는 바, 이는 백라이트유닛(30)으로부터의 빛샘을 방지하기 위함이다. In FIG. 4, each corner of the first adhesive part 151 and the second adhesive part 155 may have cutouts 152 and 156 having approximately “Z” shapes cut in corresponding shapes. This is to prevent light leakage from the backlight unit 30.

Claims (6)

  1. 디스플레이장치의 백라이트유닛과 액정패널을 접착하기 위한 접착시트 제조방법에 있어서, In the adhesive sheet manufacturing method for bonding the backlight unit and the liquid crystal panel of the display device,
    메인필름에 제1접착테이프를 제1방향으로 설정된 이격간격을 이루며 순차적으로 부착하는 단계와; Sequentially attaching the first adhesive tape to the main film at intervals set in the first direction;
    상기 제1접착테이프의 양단에 상기 제1방향의 가로방향인 제2방향으로 제2접착테이프를 부착하여 사각틀 형상을 이루도록 하는 단계와; Attaching second adhesive tapes to both ends of the first adhesive tape in a second direction in a horizontal direction of the first direction to form a rectangular frame shape;
    상기 제1접착테이프 및 제2접착테이프의 상부로 커버필름을 합지하여 접착시트를 만드는 단계와; Making an adhesive sheet by laminating a cover film on top of the first adhesive tape and the second adhesive tape;
    상기 접착시트에 스크랩부를 구분하기 위한 구분선을 형성하는 단계와; Forming a dividing line for dividing the scrap portion in the adhesive sheet;
    상기 스크랩부를 제거하는 단계;를 포함하는 디스플레이장치용 접착시트 제조방법. Removing the scrap portion; Adhesive sheet manufacturing method for a display device comprising a.
  2. 제1항에 있어서, The method of claim 1,
    상기 제1접착테이프를 부착하는 단계는, Attaching the first adhesive tape,
    롤에 감겨진 메인필름의 이송방향의 가로방향인 상기 제1방향으로, 롤에 감겨진 상기 제1접착테이프를 단속적으로 절단하여 상기 메인필름에 부착하는 단계와; Intermittently cutting the first adhesive tape wound on the roll in the first direction, the transverse direction of the transport direction of the main film wound on the roll, and attaching the first adhesive tape to the main film;
    상기 제1접착테이프에 제1스크랩영역을 구분하기 위한 제1절단선을 형성하는 단계와; Forming a first cutting line for dividing a first scrap region on the first adhesive tape;
    상기 제1스크랩영역을 제거하는 단계;를 포함하는 것을 특징으로 하는 디스플레이장치용 접착시트 제조방법. Removing the first scrap region; Method for manufacturing an adhesive sheet for a display device comprising a.
  3. 제2항에 있어서, The method of claim 2,
    상기 제1접착테이프를 단속적으로 절단하여 상기 메인필름에 부착하는 단계는, 상기 메인필름을 설정 속도로 균일하게 이송하는 단계와, 상기 제1접착테이프를 설정 두께만큼 상기 메인필름 상부로 이송시킨 후 정지하는 단계와; 커터를 이용하여 상기 제1접착테이프를 절단하여 상기 메인필름에 부착하는 단계와; 상기 이격간격 만큼 상기 제1접착테이프의 이송을 정지하는 단계;를 포함하는 것을 특징으로 하는 디스플레이장치용 접착시트 제조방법. The step of intermittently cutting the first adhesive tape and attaching the main film to the main film may include uniformly transferring the main film at a set speed, and transferring the first adhesive tape to the upper part of the main film by a predetermined thickness. Stopping; Cutting the first adhesive tape using a cutter and attaching the first adhesive tape to the main film; Stopping the transfer of the first adhesive tape by the separation interval; Display sheet adhesive sheet manufacturing method comprising a.
  4. 제3항에 있어서, The method of claim 3,
    상기 제2접착테이프를 부착하는 단계는, Attaching the second adhesive tape,
    상기 제1접착테이프의 각 양단을 따라 상기 메인필름의 이송방향인 상기 제2방향으로, 롤에 감겨진 상기 제2접착테이프를 상기 메인필름에 부착하는 단계와; Attaching the second adhesive tape wound on a roll to the main film in the second direction, which is a conveying direction of the main film, along each end of the first adhesive tape;
    상기 제2접착테이프에 제2스크랩영역을 구분하기 위한 제2절단선을 형성하는 단계와; Forming a second cutting line for dividing a second scrap region on the second adhesive tape;
    상기 제2스크랩영역을 제거하는 단계;를 포함하는 것을 특징으로 하는 디스플레이장치용 접착시트 제조방법. Removing the second scrap region; adhesive sheet manufacturing method for a display device comprising a.
  5. 제4항에 있어서, The method of claim 4, wherein
    상기 제2스크랩영역을 제거하는 단계와, 상기 커버필름을 합지하는 단계는 동시에 수행되는 것을 특징으로 하는 디스플레이장치용 접착시트 제조방법. Removing the second scrap region and laminating the cover film at the same time.
  6. 제1항에 있어서, The method of claim 1,
    상기 메인필름 및 커버필름은 폴리에틸렌 테레프탈레이트(PET) 재질로 마련되는 것을 특징으로 하는 디스플레이장치용 접착시트 제조방법. The main film and the cover film is a manufacturing method of the adhesive sheet for a display device, characterized in that the polyethylene terephthalate (PET) material is provided.
PCT/KR2014/004466 2013-05-24 2014-05-19 Method for manufacturing adhesive sheet for display device WO2014189243A1 (en)

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