JP2012254543A - Multi-layer absorptive sheet - Google Patents

Multi-layer absorptive sheet Download PDF

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JP2012254543A
JP2012254543A JP2011127987A JP2011127987A JP2012254543A JP 2012254543 A JP2012254543 A JP 2012254543A JP 2011127987 A JP2011127987 A JP 2011127987A JP 2011127987 A JP2011127987 A JP 2011127987A JP 2012254543 A JP2012254543 A JP 2012254543A
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layer
pet film
sheet
foamed resin
multilayer
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JP5808156B2 (en
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Takanori Kinoshita
孝徳 木下
Toshiaki Miki
俊明 三木
Kanzo Shimizu
寛三 清水
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ISHIYAMA SEISAKUSHO KK
Nichiei Kako KK
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ISHIYAMA SEISAKUSHO KK
Nichiei Kako KK
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Priority to KR1020110087737A priority patent/KR101159052B1/en
Priority to KR1020120034506A priority patent/KR20120136279A/en
Priority to CN201210186989.0A priority patent/CN102815060B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/12—Mountings, e.g. non-detachable insulating substrates
    • H01L23/14—Mountings, e.g. non-detachable insulating substrates characterised by the material or its electrical properties
    • H01L23/145—Organic substrates, e.g. plastic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
    • H01L21/67703—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations
    • H01L21/67706—Mechanical details, e.g. roller, belt
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/351—Thickness

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
  • Polarising Elements (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent sheet to prevent the generation of corrugations or exfoliations although the sheet is used at a curved part for a long period of time.SOLUTION: The absorbent sheet 10 includes: a foamed resin layer 12 including an acryl-based foamed resin and having a thickness of the foamed resin layer 12 of 50-500 μm; and at least one PET film base layer 11 layered on a back surface of the foamed resin layer 12 and having a thickness of 5-250 μm. The entire thickness of the sheet is not more than 800 μm.

Description

本発明は、フィルム、シートおよび極薄パネル等の軽量物を吸着して保持する多層吸着シートに関する。   The present invention relates to a multilayer adsorbing sheet that adsorbs and holds lightweight objects such as films, sheets, and ultrathin panels.

従来から、偏光フィルムを液晶パネルに貼り付ける貼付装置においては、搬送対象物としての偏光フィルムを貼付位置まで搬送するために吸着シートが使用されている。図１に示すように、貼付装置１は、駆動ローラ２および複数の従動ローラ３に架けられた環状の無限搬送ベルト８と、無限搬送ベルト８の外表面に設けられた吸着シート１０’と、供給された保護シートＳ１、Ｓ２付き偏光フィルムＦを吸着シート１０’の表面に押し付ける押圧ローラ５と、偏光フィルムＦから保護シートＳ２を剥がす剥離ローラ６およびグリップローラ７と、回転軸位置が上下に往復移動可能な圧着ローラ４とを備えている。 Conventionally, in a sticking apparatus for sticking a polarizing film to a liquid crystal panel, an adsorption sheet is used to transport a polarizing film as a transport object to a sticking position. As shown in FIG. 1, the sticking device 1 includes an annular infinite conveying belt 8 that is hung on the driving roller 2 and the plurality of driven rollers 3, an adsorption sheet 10 ′ provided on the outer surface of the infinite conveying belt 8, The pressure roller 5 that presses the supplied polarizing film F with the protective sheets S 1 and S 2 against the surface of the suction sheet 10 ′, the peeling roller 6 and the grip roller 7 that peel the protective sheet S 2 from the polarizing film F, and the rotational axis position Includes a pressure roller 4 that can reciprocate up and down.

この貼付装置１では、無限搬送ベルト８を変形させながら圧着ローラ４が下方に移動することにより、保護シートＳ２が剥がされることにより露出した偏光フィルムＦの貼付面Ｆａが液晶パネルＰのパネル表面Ｐａに貼り付けられる（図１（Ｂ）（Ｃ）参照）。 In the sticking apparatus 1, by the pressure roller 4 while deforming the endless conveyor belt 8 is moved downward, application surface F a polarizing film F exposed by the protective sheet S 2 is peeled is a liquid crystal panel P panel affixed to the surface P a (see FIG. 1 (B) (C)) .

また、図２に示すように、別の貼付装置２０は、円筒状のドラム２１と、ドラム２１の外表面に設けられた吸着シート１０’と、保護シートＳ付き偏光フィルムＦを吸着シート１０’の表面に押し付けて供給するフィルム供給手段２２と、ドラム２１が時計回りに約９０°回転した位置において偏光フィルムＦから保護シートＳを剥がす剥離手段２３と、ドラム２１がさらに約９０°回転し位置において液晶パネルＰを供給するパネル供給手段２４とを備えている。   Further, as shown in FIG. 2, another sticking device 20 includes a cylindrical drum 21, a suction sheet 10 ′ provided on the outer surface of the drum 21, and a polarizing film F with a protective sheet S. Film supply means 22 pressed against the surface of the film, peeling means 23 for peeling off the protective sheet S from the polarizing film F at a position where the drum 21 is rotated about 90 ° clockwise, and a position where the drum 21 is further rotated about 90 °. And a panel supply means 24 for supplying the liquid crystal panel P.

この貼付装置２０では、液晶パネルＰを吸着保持したステージ２５が下方に移動することにより、保護シートＳが剥がされることにより露出した偏光フィルムＦの貼付面Ｆａが液晶パネルＰに貼り付けられる。 In the sticking device 20, by the stage 25 to the liquid crystal panel P sucked and held is moved downwardly, application surface F a polarizing film F exposed by the protective sheet S is peeled is stuck to the liquid crystal panel P.

貼付装置１、２０で使用可能な従来の吸着シート１０’としては、例えば、特許文献１に記載のものが知られている。この従来の吸着シート１０’は、中間層となる基材層、基材層の裏面に設けられた粘着層、および基材層の表面に設けられた発泡樹脂層の３層構造を有し、粘着層が無限搬送ベルト８またはドラム２１の外表面に貼り付けられる。したがって、貼付装置１、２０においては、吸着シート１０’の発泡樹脂層が偏光フィルムＦ（保護シートＳ１）を吸着して保持する。 As a conventional suction sheet 10 ′ that can be used in the sticking apparatuses 1 and 20, for example, the one described in Patent Document 1 is known. This conventional adsorption sheet 10 ′ has a three-layer structure of a base material layer serving as an intermediate layer, an adhesive layer provided on the back surface of the base material layer, and a foamed resin layer provided on the surface of the base material layer, An adhesive layer is attached to the outer surface of the infinite conveyance belt 8 or the drum 21. Therefore, in the sticking apparatuses 1 and 20, the foamed resin layer of the adsorption sheet 10 ′ adsorbs and holds the polarizing film F (protective sheet S 1 ).

特開２０１０−７０７４０号公報JP 2010-70740 A

ところで、図１に示す貼付装置１は、吸着シート１０’の搬送経路に複数の屈曲部が存在しているので、吸着シート１０’には屈曲部を通過する際に引っ張り力がかかる。また、図２に示す貼付装置２０は、吸着シート１０’の搬送経路全体が屈曲しているので、吸着シート１０’には常に引っ張り力がかかる。   By the way, in the sticking apparatus 1 shown in FIG. 1, since a plurality of bent portions exist in the conveyance path of the suction sheet 10 ′, a tensile force is applied to the suction sheet 10 ′ when passing through the bent portions. Further, in the sticking device 20 shown in FIG. 2, since the entire conveyance path of the suction sheet 10 'is bent, a tensile force is always applied to the suction sheet 10'.

この引っ張り力は、屈曲中心（ドラム２１の回転中心）に近い粘着層（基材層）においては比較的小さく、屈曲中心から遠い発泡樹脂層においては比較的大きいので、吸着シート１０’内において引っ張り力に偏りが生じことになる。また、従来の吸着シート１０’は、発泡樹脂層の好ましい厚みが２〜８ｍｍとされ、しかも基材層として分厚い布やクロス、不織布を使用しており、適度な腰の強さをもつため屈曲部に対する追従性に優れるとされているが、その一方で、吸着シート１０’全体の厚みが数ｍｍ〜１０数ｍｍ以上と非常に分厚いので、上記引っ張り力の偏りはかなり大きい。   This tensile force is relatively small in the adhesive layer (base material layer) close to the center of bending (rotation center of the drum 21) and relatively large in the foamed resin layer far from the center of bending. There will be a bias in force. Further, in the conventional adsorbing sheet 10 ', the preferred thickness of the foamed resin layer is 2 to 8 mm, and a thick cloth, cloth or non-woven fabric is used as the base material layer, and since it has an appropriate waist strength, it is bent. However, since the thickness of the entire adsorbing sheet 10 ′ is very thick, such as several mm to several tens mm or more, the bias of the tensile force is considerably large.

したがって、貼付装置１、２０において従来の吸着シート１０’を使用し続けると、最も引っ張り力がかかる発泡樹脂層に延び癖がついて表面に皺が生じたり、無限搬送ベルト８またはドラム２１から吸着シート１０’が捲れ上がったりして、偏光フィルムＦの吸着・搬送に支障をきたすおそれがある。このため、これらの問題が生じた場合は、貼付装置１、２０を一時停止して、吸着シート１０’を新しいものにする面倒な交換作業を行う必要があった。   Accordingly, if the conventional suction sheet 10 ′ is continuously used in the pasting devices 1, 20, the foamed resin layer to which the most tensile force is applied is stretched and wrinkles are generated, or the surface is wrinkled, or the suction sheet from the endless conveying belt 8 or the drum 21. 10 'may be rolled up, and the polarizing film F may be sucked and transported. Therefore, when these problems occur, it is necessary to perform troublesome replacement work for temporarily stopping the sticking apparatuses 1 and 20 and replacing the suction sheet 10 'with a new one.

本発明は上記事情に鑑みてなされたものであって、その課題とするところは、屈曲部を有する環境で長期にわたって使用しても皺や捲れが生じない多層吸着シートを提供することにある。   This invention is made | formed in view of the said situation, The place made into the subject is providing the multilayer adsorbing sheet which does not produce a wrinkle and a twist even if it uses it for a long term in the environment which has a bending part.

上記課題を解決するために、本発明に係る多層吸着シートは、アクリル系発泡樹脂からなる厚みが５０μｍ〜５００μｍの発泡樹脂層と、発泡樹脂層の裏面に積層された少なくとも１層のＰＥＴフィルム基材層とを備え、ＰＥＴフィルム基材層の厚みが５μｍ〜２５０μｍであり、かつ全体の厚みが８００μｍ以下であることを特徴としている。
この構成によれば、全体の厚みを８００μｍ以下と薄型化したことにより、屈曲部においてＰＥＴフィルム基材層にかかる引っ張り力および発泡樹脂層にかかる引っ張り力の偏りを最小限に抑えることができる。すなわち、皺や捲れが生じにくい多層吸着シートを実現することができる。 In order to solve the above-mentioned problems, a multilayer adsorbing sheet according to the present invention includes a foamed resin layer having an acrylic foam resin thickness of 50 μm to 500 μm, and at least one PET film base laminated on the back surface of the foamed resin layer. The PET film substrate layer has a thickness of 5 μm to 250 μm and a total thickness of 800 μm or less.
According to this configuration, by reducing the overall thickness to 800 μm or less, it is possible to minimize the bias of the tensile force applied to the PET film substrate layer and the tensile force applied to the foamed resin layer at the bent portion. That is, it is possible to realize a multilayer adsorbing sheet that hardly causes wrinkles and wrinkles.

上記多層吸着シートは、ＰＥＴフィルム基材層の発泡樹脂層とは反対側の面に積層されたアクリル系粘着剤からなる粘着層をさらに備えていてもよい。
この構成によれば、粘着層の粘着力を利用して無限搬送ベルトまたはドラム等に簡単かつしっかりと保持させることができる。 The multilayer adsorption sheet may further include an adhesive layer made of an acrylic adhesive laminated on the surface of the PET film base layer opposite to the foamed resin layer.
According to this configuration, the adhesive force of the adhesive layer can be used to easily and securely hold the infinite conveying belt or the drum.

上記多層吸着シートは、粘着層のＰＥＴフィルム基材層とは反対側の面に積層されたＰＥＴフィルムからなるラミネート層をさらに備えていてもよい。
一般的に、（保護フィルム付）偏光フィルムのような搬送対象物は、種類、グレードおよび付加する性能に応じてフィルム構成、材質またはシート厚が異なる複数の製品が存在するので、貼付装置側においても、多層吸着シート全体の厚みや腰の強さ等を調整して各製品に対する吸着力、吸着圧および搬送性等を最適化する必要がある。しかしながら、多層吸着シート全体の厚みをＰＥＴフィルム基材層のみを用いて調節すると、ＰＥＴフィルムの特性である剛性が影響して多層吸着シート自体の腰が強くなり過ぎ、屈曲部に対する追従性が損なわれる結果となる。
この点、上記の構成によれば、ＰＥＴフィルムからなるラミネート層をさらに積層し、かつＰＥＴフィルム基材層とラミネート層の間に比較的柔軟で粘弾性のある粘着層を挟持したので、全体の厚みと腰の強さとを同時に調節することが可能になる。すなわち、上記の構成によれば、皺や捲れの発生が抑えられるとともに、屈曲部に対する追従性に優れた多層吸着シートが得られる。 The multilayer adsorption sheet may further include a laminate layer made of a PET film laminated on the surface of the adhesive layer opposite to the PET film base layer.
Generally, there are multiple products with different film configurations, materials, or sheet thicknesses depending on the type, grade, and performance to be added, such as a polarizing film (with a protective film). However, it is necessary to optimize the adsorption force, adsorption pressure, transportability and the like for each product by adjusting the thickness and waist strength of the entire multilayer adsorption sheet. However, if the thickness of the entire multilayer adsorbing sheet is adjusted using only the PET film base layer, the stiffness of the PET film is affected and the stiffness of the multilayer adsorbing sheet itself becomes too strong and the followability to the bent portion is impaired. Result.
In this regard, according to the above configuration, the laminate layer made of PET film is further laminated, and the adhesive layer having a relatively soft and viscoelasticity is sandwiched between the PET film base layer and the laminate layer. It is possible to adjust the thickness and the strength of the waist at the same time. That is, according to said structure, generation | occurrence | production of a wrinkle and a twist is suppressed, and the multilayer adsorption sheet excellent in the followable | trackability with respect to a bending part is obtained.

上記多層吸着シートは、ラミネート層の粘着層とは反対側の面に、交互に積層されたアクリル系粘着剤からなるｎ層（ただし、ｎは１以上の整数）の粘着層とＰＥＴフィルムからなるｎ層のラミネート層とをさらに備えていてもよく、また、ラミネート層の粘着層とは反対側の面に、交互に積層されたアクリル系粘着剤からなるｍ層（ただし、ｍは１以上の整数）の粘着層とＰＥＴフィルムからなるｍ−１層のラミネート層とをさらに備えていてもよい。
この構成によれば、積層数ｎ、ｍを調節することにより全体の厚みと腰の強さとを調整できるため、屈曲部に対する追従性にさらに優れた多層吸着シートが得られる。 The multilayer adsorbing sheet is composed of an n-layer (where n is an integer of 1 or more) pressure-sensitive adhesive layer and a PET film made of an acrylic pressure-sensitive adhesive layered alternately on the surface of the laminate layer opposite to the pressure-sensitive adhesive layer. an n-layer laminate layer, and an m-layer composed of an acrylic pressure-sensitive adhesive layered alternately on the opposite side of the laminate layer from the adhesive layer (where m is 1 or more) (Integer) adhesive layer and m-1 laminated layer made of PET film may be further provided.
According to this configuration, since the overall thickness and waist strength can be adjusted by adjusting the number of layers n and m, it is possible to obtain a multilayer adsorbing sheet that is further excellent in followability to the bent portion.

本発明によれば、屈曲部を有する環境で長期にわたって使用しても皺や捲れが生じにくい多層吸着シートを提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, even if it uses it over a long period of time in the environment which has a bending part, the multilayer adsorption sheet which cannot produce a wrinkle and a twist can be provided.

貼付装置の一例であって、（Ａ）は全体側断面図、（Ｂ）および（Ｃ）は順次進行する貼付工程の様子を示す部分側断面図である。It is an example of a sticking apparatus, (A) is a whole sectional side view, (B) and (C) are partial sectional side views which show the mode of the sticking process which advances sequentially. 貼付装置の他の例を示す側断面図である。It is a sectional side view which shows the other example of a sticking apparatus. 本発明に係る多層吸着シートの側断面図である。It is a sectional side view of the multilayer adsorption sheet which concerns on this invention. 本発明の変形例に係る多層吸着シートを表面側から見た平面図である。It is the top view which looked at the multilayer adsorption sheet concerning the modification of the present invention from the surface side. 本発明の他の変形例に係る多層吸着シートの側断面図である。It is a sectional side view of the multilayer adsorption sheet which concerns on the other modification of this invention.

以下、添付図面を参照して、本発明に係る多層吸着シートの好ましい実施形態について説明する。なお、以下では、図１に示す貼付装置１で使用される多層吸着シートについて説明するが、本発明に係る多層吸着シートは、貼付装置１以外の種々の環境、例えば貼付装置２０においても使用することができる。   Hereinafter, with reference to an accompanying drawing, a desirable embodiment of a multilayer adsorption sheet concerning the present invention is described. In the following, the multilayer adsorbing sheet used in the adhering device 1 shown in FIG. 1 will be described, but the multilayer adsorbing sheet according to the present invention is also used in various environments other than the adhering device 1, for example, the adhering device 20. be able to.

図３に示すように、本発明に係る多層吸着シート１０は、ＰＥＴフィルム基材層１１と、ＰＥＴフィルム基材層１１の表面（偏光フィルムＦ側）に設けられた発泡樹脂層１２と、ＰＥＴフィルム基材層１１の裏面（無限搬送ベルト８側）に設けられた粘着層１３とを備えている。   As shown in FIG. 3, the multilayer adsorbing sheet 10 according to the present invention includes a PET film base layer 11, a foamed resin layer 12 provided on the surface of the PET film base layer 11 (on the polarizing film F side), and PET. And an adhesive layer 13 provided on the back surface of the film base material layer 11 (infinite transport belt 8 side).

ＰＥＴフィルム基材層１１は、白色ポリエチレンテレフタレートフィルム（以下、ＰＥＴフィルム）、透明ＰＥＴフィルムまたは発泡ＰＥＴフィルムから構成されている。本実施形態におけるＰＥＴフィルム基材層１１の厚みは約５０μｍであるが、これは適宜変更することができる。ただし、ＰＥＴフィルム基材層１１を薄くしすぎると、多層吸着シート１０に腰がなくなって取り扱いが難しくなる。また、ＰＥＴフィルム基材層１１を厚くしすぎると、多層吸着シート１０全体の厚みが増して、多層吸着シート１０内における引っ張り力の偏りが大きくなる。これらの点を考慮して、本発明では、ＰＥＴフィルム基材層１１の厚みを５μｍ〜２５０μｍとするのが好ましい。   The PET film substrate layer 11 is composed of a white polyethylene terephthalate film (hereinafter referred to as PET film), a transparent PET film or a foamed PET film. Although the thickness of the PET film base material layer 11 in this embodiment is about 50 micrometers, this can be changed suitably. However, if the PET film base material layer 11 is made too thin, the multilayer adsorbing sheet 10 is lost and handling becomes difficult. Moreover, when the PET film base material layer 11 is made too thick, the thickness of the multilayer adsorption sheet 10 as a whole increases, and the bias of the tensile force in the multilayer adsorption sheet 10 increases. Considering these points, in the present invention, it is preferable that the thickness of the PET film substrate layer 11 is 5 μm to 250 μm.

発泡樹脂層１２は、アクリル系発泡樹脂から構成されている。本実施形態における発泡樹脂層１２の厚みは約１００μｍであるが、これも適宜変更することができる。ただし、発泡樹脂層１２を薄くしすぎると、衝撃吸収性が弱くなり、偏光フィルムＦを吸着・保持する際に、保護シートＳ１を傷付けるおそれがある。また、発泡樹脂層１２を厚くしすぎると、多層吸着シート１０全体の厚みが増して、多層吸着シート１０内における引っ張り力の偏りが大きくなる。これらの点を考慮して、本発明では、発泡樹脂層１２の厚みを５０μｍ〜５００μｍとするのが好ましい。 The foamed resin layer 12 is made of an acrylic foamed resin. The thickness of the foamed resin layer 12 in this embodiment is about 100 μm, but this can also be changed as appropriate. However, too thin a foamed resin layer 12, shock absorption is weakened, when the suction-holding the polarizing film F, there is a possibility of damaging the protective sheet S 1. Moreover, when the foamed resin layer 12 is too thick, the thickness of the entire multilayer adsorbing sheet 10 increases, and the bias of the tensile force in the multilayer adsorbing sheet 10 increases. Considering these points, in the present invention, the thickness of the foamed resin layer 12 is preferably 50 μm to 500 μm.

発泡樹脂層１２は、例えば、機械発泡等により発泡させたアクリル系樹脂をＰＥＴフィルム基材層１１上に均一にコーティングし、これを乾燥させることにより形成することができる。発泡樹脂層１２の発泡倍率は、前記の衝撃吸収力および偏光フィルムＦに対する吸着力を勘案して決定すればよい。   The foamed resin layer 12 can be formed, for example, by uniformly coating an acrylic resin foamed by mechanical foaming or the like on the PET film substrate layer 11 and drying it. The expansion ratio of the foamed resin layer 12 may be determined in consideration of the impact absorbing power and the adsorptive power to the polarizing film F.

粘着層１３は、アクリル系粘着剤から構成されている。本実施形態における粘着層１３の厚みは約２５μｍであるが、粘着力や多層吸着シート１０全体の厚みを勘案して、１０μｍ〜５０μｍの範囲で適宜変更することができる。また、粘着層１３は、多層吸着シート１０の交換を容易にするために、再剥離性を有していることが好ましい。   The adhesive layer 13 is composed of an acrylic adhesive. The thickness of the pressure-sensitive adhesive layer 13 in the present embodiment is about 25 μm, but can be appropriately changed in the range of 10 μm to 50 μm in consideration of the adhesive strength and the thickness of the multilayer adsorption sheet 10 as a whole. The adhesive layer 13 preferably has removability in order to facilitate replacement of the multilayer adsorbing sheet 10.

上記ＰＥＴフィルム基材層１１、発泡樹脂層１２および粘着層１３を積層してなる本実施形態に係る多層吸着シート１０は、全体の厚みが６５μｍ〜８００μｍであり、従来の吸着シート（厚み：数ｍｍ）よりもかなり薄く構成されている。したがって、本実施形態に係る多層吸着シート１０によれば、シート内における引っ張り力の偏りを少なくすることができ、屈曲部に起因する皺や捲れを生じにくくすることができる。   The multilayer adsorbing sheet 10 according to this embodiment formed by laminating the PET film base material layer 11, the foamed resin layer 12, and the adhesive layer 13 has an overall thickness of 65 μm to 800 μm, and a conventional adsorbing sheet (thickness: several mm). Therefore, according to the multilayer adsorbing sheet 10 according to the present embodiment, it is possible to reduce the bias of the tensile force in the sheet, and it is possible to make it difficult to cause wrinkles and wrinkles due to the bent portion.

以上、本発明に係る多層吸着シートの好ましい実施形態について説明したが、本発明はこれらの構成に限定されるものではない。   As mentioned above, although preferable embodiment of the multilayer adsorption sheet concerning this invention was described, this invention is not limited to these structures.

例えば、既成の発泡樹脂層１２を使用する場合等、発泡倍率や厚みを変更することにより発泡樹脂層１２の吸着力を調整することができない場合は、図４に示すように、発泡樹脂層１２の表面（偏光フィルムＦ側）に、例えばストライプ状の印刷層１４を印刷等により設けてもよい。印刷層１４によれば、吸着に寄与する発泡樹脂層１２の表面積を制限することにより、吸着力を容易に調整することができる。なお、印刷層１４のメッシュ上等の任意のパターンに変更することができる。   For example, when the foaming resin layer 12 cannot be adjusted by changing the foaming ratio or thickness, such as when using the existing foamed resin layer 12, as shown in FIG. For example, a stripe-shaped printing layer 14 may be provided on the surface (polarizing film F side) by printing or the like. According to the printing layer 14, the adsorption force can be easily adjusted by limiting the surface area of the foamed resin layer 12 that contributes to adsorption. In addition, it can change to arbitrary patterns, such as on the mesh of the printing layer 14. FIG.

また、無限搬送ベルト８またはドラム２１側に何らかの吸着手段（粘着層、サクション機構等）が備えられている場合は、粘着層１３を省略することができる。この場合は、多層吸着シート１０全体の厚みの最大値が７５０μｍとなるので、より皺や捲れに強い多層吸着シートが得られる。   Further, when any suction means (adhesive layer, suction mechanism, etc.) is provided on the endless conveyor belt 8 or the drum 21 side, the adhesive layer 13 can be omitted. In this case, since the maximum thickness of the multilayer adsorbing sheet 10 as a whole is 750 μm, a multilayer adsorbing sheet that is more resistant to wrinkling and curling can be obtained.

また、本発明に係る多層吸着シートは、ＰＥＴフィルム基材層１１、発泡樹脂層１２、粘着層１３および印刷層１４以外の層を追加的に備えていてもよい。例えば、図５に示す多層吸着シート１０は、粘着層１３の裏面（無限搬送ベルト８側）側に、白色ＰＥＴフィルム、透明ＰＥＴフィルムまたは発泡ＰＥＴフィルムからなるラミネート層１５（厚み：５μｍ〜２５０μｍ）と粘着層１３を交互に積層したものをさらに備えている。最も無限搬送ベルト８またはドラム２１に近い層は、図５（Ａ）に示すように、粘着層１３としてもよいし、図５（Ｂ）に示すように、ラミネート層１５としてもよい。ただし、後者の場合は、無限搬送ベルト８またはドラム２１側に何らかの吸着手段（サクション機構等）を備えておく必要がある。また、いずれの場合においても、全体の厚みが８００μｍ以下となるように各層の厚みを調整しなければならない。   The multilayer adsorbing sheet according to the present invention may additionally include a layer other than the PET film base layer 11, the foamed resin layer 12, the adhesive layer 13, and the printed layer 14. For example, the multilayer adsorbing sheet 10 shown in FIG. 5 has a laminate layer 15 (thickness: 5 μm to 250 μm) made of a white PET film, a transparent PET film, or a foamed PET film on the back surface (infinite transport belt 8 side) side of the adhesive layer 13. And an adhesive layer 13 alternately laminated. The layer closest to the infinite conveyance belt 8 or the drum 21 may be the adhesive layer 13 as shown in FIG. 5A or the laminate layer 15 as shown in FIG. However, in the latter case, it is necessary to provide some suction means (suction mechanism or the like) on the endless conveyor belt 8 or the drum 21 side. In any case, the thickness of each layer must be adjusted so that the total thickness is 800 μm or less.

図５に示す変形例に係る多層吸着シートによれば、ＰＥＴフィルムからなるラミネート層１５をさらに積層したことにより、ＰＥＴフィルム基材層１１の厚みを変更しなくても、ラミネート層１５の積層数で全体の厚みと腰の強さを同時に調整することができる。また、図５に示す多層吸着シートによれば、ＰＥＴフィルム基材層１１とラミネート層１５の間、およびラミネート層１５とラミネート層１５の間に比較的柔軟で粘弾性のある粘着層１３が挟まれているので、全体の厚みが増加したにもかかわらず屈曲部に対する追従性が損なわれることはない。なお、ＰＥＴフィルム基材層１１および各ラミネート層１５は、同種のＰＥＴフィルムであってもよいし、異種のＰＥＴフィルムであってもよい。   According to the multilayer adsorbing sheet according to the modification shown in FIG. 5, the number of laminated layers 15 can be laminated without changing the thickness of the PET film substrate layer 11 by further laminating the laminated layer 15 made of PET film. You can adjust the overall thickness and waist strength at the same time. Further, according to the multilayer adsorbing sheet shown in FIG. 5, the relatively soft and viscoelastic adhesive layer 13 is sandwiched between the PET film base layer 11 and the laminate layer 15 and between the laminate layer 15 and the laminate layer 15. Therefore, the followability to the bent portion is not impaired even though the overall thickness is increased. The PET film substrate layer 11 and each laminate layer 15 may be the same type of PET film or different types of PET films.

また、本発明に係る多層吸着シートは、ＰＥＴフィルム基材層１１が同種または異種のＰＥＴフィルムからなる複数の層を積層したものであってもよい。ただし、この場合は、ＰＥＴフィルム基材層１１全体の厚みが２５０μｍを超えないようにする必要がある。   Moreover, the multilayer adsorbing sheet according to the present invention may be one in which the PET film substrate layer 11 is formed by laminating a plurality of layers made of the same type or different types of PET films. However, in this case, it is necessary that the total thickness of the PET film substrate layer 11 does not exceed 250 μm.

１ 貼付装置
２ 駆動ローラ
３ 従動ローラ
４ 圧着ローラ
５ 押圧ローラ
６ 剥離ローラ
７ グリップローラ
８ 無限搬送ベルト
Ｆ 偏光フィルム
Ｐ 液晶パネル
１０ 多層吸着シート
１１ ＰＥＴフィルム基材層
１２ 発泡樹脂層
１３ 粘着層
１４ 印刷層
１５ ラミネート層
２０ 貼付装置
２１ ドラム
２２ フィルム供給手段
２３ 剥離手段
２４ パネル供給手段
２５ ステージ DESCRIPTION OF SYMBOLS 1 Sticking apparatus 2 Drive roller 3 Drive roller 4 Press roller 5 Press roller 6 Peel roller 7 Grip roller 8 Infinite conveyance belt F Polarizing film P Liquid crystal panel 10 Multilayer adsorption sheet 11 PET film base material layer 12 Foamed resin layer 13 Adhesive layer 14 Printing Layer 15 Laminating layer 20 Sticking device 21 Drum 22 Film supply means 23 Peeling means 24 Panel supply means 25 Stage

Claims (5)

アクリル系発泡樹脂からなる厚みが５０μｍ〜５００μｍの発泡樹脂層と、
前記発泡樹脂層の裏面に積層された少なくとも１層のＰＥＴフィルム基材層と、
を備え、前記ＰＥＴフィルム基材層の厚みが５μｍ〜２５０μｍであり、かつ全体の厚みが８００μｍ以下であることを特徴とする多層吸着シート。 A foamed resin layer having a thickness of 50 μm to 500 μm made of an acrylic foamed resin;
At least one PET film base material layer laminated on the back surface of the foamed resin layer;
A multilayer adsorbing sheet, wherein the PET film substrate layer has a thickness of 5 μm to 250 μm and a total thickness of 800 μm or less. 前記ＰＥＴフィルム基材層の前記発泡樹脂層とは反対側の面に積層されたアクリル系粘着剤からなる粘着層をさらに備えたことを特徴とする請求項１に記載の多層吸着シート。   The multilayer adsorption sheet according to claim 1, further comprising an adhesive layer made of an acrylic adhesive laminated on a surface of the PET film base layer opposite to the foamed resin layer. 前記粘着層の前記ＰＥＴフィルム基材層とは反対側の面に積層されたＰＥＴフィルムからなるラミネート層をさらに備えたことを特徴とする請求項２に記載の多層吸着シート。   The multilayer adsorption sheet according to claim 2, further comprising a laminate layer made of a PET film laminated on a surface of the adhesive layer opposite to the PET film substrate layer. 前記ラミネート層の前記粘着層とは反対側の面に、交互に積層されたアクリル系粘着剤からなるｎ層（ただし、ｎは１以上の整数）の粘着層とＰＥＴフィルムからなるｎ層のラミネート層とをさらに備えたことを特徴とする請求項３に記載の多層吸着シート。   A laminate of n layers made of an acrylic pressure-sensitive adhesive layer (where n is an integer of 1 or more) and a PET film alternately laminated on the surface of the laminate layer opposite to the pressure-sensitive adhesive layer The multilayer adsorption sheet according to claim 3, further comprising a layer. 前記ラミネート層の前記粘着層とは反対側の面に、交互に積層されたアクリル系粘着剤からなるｍ層（ただし、ｍは１以上の整数）の粘着層とＰＥＴフィルムからなるｍ−１層のラミネート層とをさらに備えたことを特徴とする請求項３に記載の多層吸着シート。   The m-1 layer which consists of the adhesive layer of the acrylic adhesive alternately laminated | stacked on the surface on the opposite side to the said adhesion layer of the said lamination layer (however, m is an integer greater than or equal to 1), and PET film The multilayer adsorbing sheet according to claim 3, further comprising: a laminate layer.
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