JP2013020810A - Masking film laminating original plate for light guide plate - Google Patents

Masking film laminating original plate for light guide plate Download PDF

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JP2013020810A
JP2013020810A JP2011153187A JP2011153187A JP2013020810A JP 2013020810 A JP2013020810 A JP 2013020810A JP 2011153187 A JP2011153187 A JP 2011153187A JP 2011153187 A JP2011153187 A JP 2011153187A JP 2013020810 A JP2013020810 A JP 2013020810A
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guide plate
light guide
masking film
dot pattern
original plate
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JP2011153187A
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JP5391238B2 (en
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Yasuhiro Kato
泰礼 加藤
Norimitsu Sakata
規光 坂田
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Priority to JP2011153187A priority Critical patent/JP5391238B2/en
Priority to CN2012102366672A priority patent/CN102879853A/en
Priority to TW101124818A priority patent/TWI567433B/en
Priority to KR1020120074942A priority patent/KR20130007982A/en
Publication of JP2013020810A publication Critical patent/JP2013020810A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00663—Production of light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects

Abstract

PROBLEM TO BE SOLVED: To provide a masking film laminating original plate for light guide plate, capable of restraining defective pieces from flowing while alleviating inspection burdens.SOLUTION: The masking film laminating original plate for light guide plate 1 is structured of an original plate for light guide plate 2, and masking films 3A, 3B attached to both sides of the original plate for light guide plate 2, respectively. One of the main surfaces of the original plate for light guide plate 2 is a printing surface 2a on which a dot pattern is printed, while the another surface the original plate for light guide plate 2 is a non-printing surface 2b on which no dot patterns are printed. Haze values of the masking films 3A, 3B are 40% or less, the haze value representing a turbidity (a degree of opacity) of a film.

Description

本発明は、導光板原板にマスキングフィルムが貼合されてなるマスキングフィルム貼合導光板原板及びドットパターン印刷導光板に関するものである。   The present invention relates to a masking film-bonded light guide plate original plate and a dot pattern printing light guide plate, in which a masking film is bonded to a light guide plate original plate.

従来のマスキングフィルム貼合導光板原板としては、例えば特許文献１に記載されているように、導光板原板の表面に傷付き防止用のマスキングフィルムを貼着したものが知られている。   As a conventional masking film-bonded light guide plate original plate, for example, as described in Patent Document 1, a masking film for preventing scratches is attached to the surface of a light guide plate original plate.

特開２００５−１３１７８３号公報JP 2005-131783 A

しかしながら、上記従来技術においては、以下の問題点が存在する。即ち、後工程において、マスキングフィルム貼合導光板原板の一面のマスキングフィルムを剥がし、その面にドットパターンを印刷した後、ドットの欠けやにじみ等が無いかどうかをチェックする。また、そのような印刷物の検査と併せて、導光板の傷や汚れのチェックも行うが、導光板のような光学用途に用いられる製品は、高い透明性が求められ、傷や汚れの管理が厳しい。印刷物及び傷や汚れのチェックは、マスキングフィルム貼合導光板原板の他面にマスキングフィルムが貼合されたままの状態で行われる。このため、マスキングフィルムが白いと、同じ白いドットパターンと重なるため、ドットパターンの不具合が見え難く、また傷や汚れも見え難い。ドットパターンの不具合及び傷や汚れが見え難いと、検品（検査）に時間がかかるばかりでなく、不良品の流出の可能性も高くなる。また、導光板は液晶表示装置に用いられるが、近年では液晶表示装置の画面が大型化している。このため、検査すべき画面の面積が大きくなるため、検品時間が更に長くなり、検査の負担が増大する。   However, the following problems exist in the prior art. That is, in the subsequent process, the masking film on one surface of the masking film-bonded light guide plate is peeled off, and after the dot pattern is printed on the surface, it is checked whether there are any missing or blurred dots. In addition to the inspection of printed matter, the light guide plate is also checked for scratches and dirt. However, products used for optical applications such as the light guide plate are required to have high transparency, and scratches and dirt must be managed. Strict. A check of printed matter and scratches and dirt is performed in a state where the masking film is still bonded to the other surface of the masking film-bonded light guide plate. For this reason, when the masking film is white, it overlaps with the same white dot pattern, so it is difficult to see defects in the dot pattern, and it is also difficult to see scratches and dirt. If it is difficult to see defects in the dot pattern, scratches and dirt, not only inspection (inspection) takes time, but also the possibility of outflow of defective products increases. In addition, the light guide plate is used in a liquid crystal display device, but in recent years, the screen of the liquid crystal display device has become larger. For this reason, since the area of the screen to be inspected is increased, the inspection time is further increased and the inspection burden is increased.

本発明の目的は、検査負担を軽減しつつ、不良品の流出を抑制することができるマスキングフィルム貼合導光板原板及びドットパターン印刷導光板を提供することである。   The objective of this invention is providing the masking film bonding light-guide plate original plate and dot pattern printing light-guide plate which can suppress the outflow of inferior goods, reducing an inspection burden.

本発明は、導光板原板の表面にマスキングフィルムが貼合されてなるマスキングフィルム貼合導光板原板であって、マスキングフィルムのヘイズが４０％以下であることを特徴とするものである。   The present invention is a masking film-bonded light guide plate original plate in which a masking film is bonded to the surface of a light guide plate original plate, wherein the masking film has a haze of 40% or less.

このように本発明のマスキングフィルム貼合導光板原板においては、マスキングフィルムのヘイズを４０％以下とすることにより、マスキングフィルムの透明性が確保される。このため、後工程において、マスキングフィルム貼合導光板原板の一面のマスキングフィルムを剥がし、その面にドットパターンを印刷して、ドットパターン印刷導光板を作製した際に、ドットパターンの不具合、ドットパターン印刷導光板に存在する傷や汚れが見えやすくなる。これにより、ドットパターン印刷導光板の検査において、検品時間が短縮され、検査負担が軽減される。また、ドットパターンの不具合、ドットパターン印刷導光板に存在する傷や汚れの見落としが防止されるため、不良品の流出が抑制される。   Thus, in the masking film bonding light-guide plate original plate of this invention, the transparency of a masking film is ensured by making the haze of a masking film into 40% or less. For this reason, in the post-process, when the masking film on one side of the masking film-bonded light guide plate is peeled off, the dot pattern is printed on the surface, and a dot pattern printing light guide plate is produced. Scratches and dirt existing on the printed light guide plate can be easily seen. Thereby, in the inspection of the dot pattern printing light guide plate, the inspection time is shortened and the inspection burden is reduced. Moreover, since the defect of a dot pattern and the oversight of the flaw and dirt which exist in a dot pattern printing light-guide plate are prevented, the outflow of inferior goods is suppressed.

また、本発明は、導光板原板の一面にドットパターンが印刷され、導光板原板の他面にマスキングフィルムが貼合されてなるドットパターン印刷導光板であって、マスキングフィルムのヘイズが４０％以下であることを特徴とするものである。   The present invention is also a dot pattern printing light guide plate in which a dot pattern is printed on one surface of a light guide plate original plate and a masking film is bonded to the other surface of the light guide plate original plate, and the haze of the masking film is 40% or less. It is characterized by being.

このように本発明のドットパターン印刷導光板においては、マスキングフィルムのヘイズを４０％以下とすることにより、マスキングフィルムの透明性が確保される。このため、ドットパターンの不具合、ドットパターン印刷導光板に存在する傷や汚れが見えやすくなる。これにより、ドットパターン印刷導光板の検査において、検品時間が短縮され、検査負担が軽減される。また、ドットパターンの不具合、ドットパターン印刷導光板に存在する傷や汚れの見落としが防止されるため、不良品の流出が抑制される。   Thus, in the dot pattern printing light guide plate of the present invention, the transparency of the masking film is ensured by setting the haze of the masking film to 40% or less. For this reason, it becomes easy to see the defect of a dot pattern, and the damage | wound and dirt which exist in a dot pattern printing light-guide plate. Thereby, in the inspection of the dot pattern printing light guide plate, the inspection time is shortened and the inspection burden is reduced. Moreover, since the defect of a dot pattern and the oversight of the flaw and dirt which exist in a dot pattern printing light-guide plate are prevented, the outflow of inferior goods is suppressed.

本発明によれば、検査負担を軽減しつつ、不良品の流出を抑制し、高品質の製品を安定して供給することができる。   According to the present invention, it is possible to stably supply high-quality products while reducing the inspection burden and suppressing the outflow of defective products.

本発明に係わるマスキングフィルム貼合導光板原板の一実施形態を示す側面図である。It is a side view which shows one Embodiment of the masking film bonding light-guide plate original plate concerning this invention. 図１に示したマスキングフィルム貼合導光板原板を用いてドットパターン印刷導光板を製造する工程を示す側面図である。It is a side view which shows the process of manufacturing a dot pattern printing light-guide plate using the masking film bonding light-guide plate original plate shown in FIG.

以下、本発明に係わるマスキングフィルム貼合導光板原板及びドットパターン印刷導光板の好適な実施形態について、図面を参照して詳細に説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a masking film-bonded light guide plate original plate and a dot pattern printed light guide plate according to the present invention will be described in detail with reference to the drawings.

図１は、本発明に係わるマスキングフィルム貼合導光板原板の一実施形態を示す側面図である。同図において、本実施形態のマスキングフィルム貼合導光板原板１は、導光板原板２と、この導光板原板２の両面にそれぞれ貼合されたマスキングフィルム３Ａ，３Ｂとから構成されている。   FIG. 1 is a side view showing an embodiment of a masking film-bonded light guide plate original plate according to the present invention. In the same figure, the masking film bonding light-guide plate original plate 1 of this embodiment is comprised from the light-guide plate original plate 2 and the masking films 3A and 3B each bonded on both surfaces of this light-guide plate original plate 2. FIG.

導光板原板２は、例えばポリメタクリル酸メチル樹脂（ＰＭＭＡ）、ポリスチレン、ポリカーボネート、アクリル・スチレン共重合体、シクロオレフィン系樹脂等の透明材料で形成されている。導光板原板２の厚みは、例えば１〜４ｍｍである。導光板原板２の一方の主面は、インクによるドットパターン（後述）が印刷される印刷面２ａであり、導光板原板２の他方の主面は、ドットパターンが印刷されない非印刷面２ｂである。   The light guide plate 2 is made of a transparent material such as polymethyl methacrylate resin (PMMA), polystyrene, polycarbonate, acrylic / styrene copolymer, cycloolefin resin, and the like. The thickness of the light guide plate original plate 2 is, for example, 1 to 4 mm. One main surface of the light guide plate original plate 2 is a printing surface 2a on which a dot pattern (described later) is printed with ink, and the other main surface of the light guide plate original plate 2 is a non-printing surface 2b on which no dot pattern is printed. .

マスキングフィルム３Ａ，３Ｂは、導光板原板２の印刷面２ａ及び非印刷面２ｂの傷付きや汚染防止のための保護フィルムである。マスキングフィルム３Ａ，３Ｂは、ポリプロピレン（ＰＰ）樹脂やポリエチレン（ＰＥ）樹脂等のポリオレフィン（ＰＯ）樹脂で形成された基材と、ポリオレフィン（ＰＯ）エラストマーやエチレン・酢酸ビニル共重合体（ＥＶＡ）等で形成された粘着層とからなっている。マスキングフィルム３Ａ，３Ｂの厚みは、例えば８０〜９０μｍである。   The masking films 3A and 3B are protective films for preventing scratches and contamination of the printing surface 2a and the non-printing surface 2b of the light guide plate original plate 2. Masking films 3A and 3B are made of a base material made of polyolefin (PO) resin such as polypropylene (PP) resin or polyethylene (PE) resin, polyolefin (PO) elastomer, ethylene / vinyl acetate copolymer (EVA), etc. It consists of the adhesion layer formed by. The thickness of the masking films 3A and 3B is, for example, 80 to 90 μm.

このようなマスキングフィルム貼合導光板原板１を製造するときは、まずＰＭＭＡ等の原料をシート状に押出成形して、導光板原板２を作製する。そして、導光板原板２の両面にマスキングフィルム３Ａ，３Ｂをシート温度４０〜１００℃で貼合する。そして、マスキングフィルム３Ａ，３Ｂが貼合された導光板原板２を原板製品サイズにカットすることで、マスキングフィルム貼合導光板原板１が得られる。   When manufacturing such a masking film-bonded light guide plate original plate 1, first, a raw material such as PMMA is extruded into a sheet shape to produce the light guide plate original plate 2. And masking film 3A, 3B is bonded by the sheet | seat temperature of 40-100 degreeC on both surfaces of the light-guide plate original plate 2. FIG. And the masking film bonding light-guide plate original plate 1 is obtained by cutting the light-guide plate original plate 2 with which masking film 3A, 3B was bonded to a raw material product size.

マスキングフィルム３Ａ，３Ｂのヘイズは、４０％以下である。ヘイズは、フィルムの透明性を測定し、濁度（曇度）を表わすものである。ヘイズは、全光線透過光に対する拡散透過光の割合から求められるものであり、フィルムの粗さ等の表面状態に影響を受ける。フィルムの曇度が低くなる、つまりフィルムの透明性が高くなるほど、フィルムのヘイズが低くなる。   The haze of the masking films 3A and 3B is 40% or less. Haze measures the transparency of a film and represents turbidity (cloudiness). The haze is determined from the ratio of diffuse transmitted light to total light transmitted light, and is affected by the surface state such as film roughness. The haze of a film becomes low, so that the cloudiness of a film becomes low, ie, the transparency of a film becomes high.

上記のマスキングフィルム貼合導光板原板１を用いて、ドットパターン印刷導光板５（図２参照）が作製される。ドットパターン印刷導光板５は、特に図示はしないが、液晶表示装置に搭載されるものである。具体的には、ドットパターン印刷導光板５は、バックライトの一部を構成し、光源により液晶パネルを照明するために用いられるものである。   A dot pattern printing light guide plate 5 (see FIG. 2) is produced using the masking film-bonded light guide plate original plate 1 described above. The dot pattern printing light guide plate 5 is mounted on a liquid crystal display device, although not particularly shown. Specifically, the dot pattern printing light guide plate 5 constitutes a part of the backlight and is used to illuminate the liquid crystal panel with a light source.

ドットパターン印刷導光板５を作製するときは、まず図２（ａ）に示すように、マスキングフィルム貼合導光板原板１を最終製品の外形となるように加工し、端面研磨を行う。例えば最終製品が４０インチタイプである場合は、マスキングフィルム貼合導光板原板１の外形寸法は５００ｍｍ×９００ｍｍとなる。   When the dot pattern printed light guide plate 5 is produced, first, as shown in FIG. 2A, the masking film-bonded light guide plate original plate 1 is processed so as to have the outer shape of the final product, and end face polishing is performed. For example, when the final product is a 40-inch type, the external dimensions of the masking film-bonded light guide plate original plate 1 are 500 mm × 900 mm.

続いて、図２（ｂ）に示すように、導光板原板２の印刷面２ａに貼合されたマスキングフィルム３Ａを剥離する。   Then, as shown in FIG.2 (b), 3A of masking films bonded by the printing surface 2a of the light-guide plate original plate 2 are peeled.

続いて、図２（ｃ）に示すように、溶剤インクにより導光板原板２の印刷面（反射面）２ａに白いドットパターン４を印刷する。そして、ドットパターン４が印刷された導光板原板２を５０〜７０℃の乾燥炉で２０〜４０分加熱することにより、溶剤インクを乾燥させる。そして、ドットパターン４が印刷された導光板原板２を常温まで冷却する。以上により、非印刷面２ｂにマスキングフィルム３Ｂが貼合された状態のドットパターン印刷導光板５が生成される。なお、溶剤インクの代わりにＵＶインク等を使用して、白色のドットパターン４を印刷しても良い。   Subsequently, as shown in FIG. 2 (c), the white dot pattern 4 is printed on the printing surface (reflection surface) 2a of the light guide plate original plate 2 by the solvent ink. And the solvent ink is dried by heating the light-guide plate original plate 2 with which the dot pattern 4 was printed for 20 to 40 minutes with a 50-70 degreeC drying furnace. And the light-guide plate original plate 2 with which the dot pattern 4 was printed is cooled to normal temperature. As described above, the dot pattern printing light guide plate 5 in a state where the masking film 3B is bonded to the non-printing surface 2b is generated. The white dot pattern 4 may be printed using UV ink or the like instead of the solvent ink.

その後、ドットパターン印刷導光板５の検査が実施される。具体的には、ドットパターン４の欠けやにじみ等が生じていないかどうかという印刷部のチェックと、ドットパターン印刷導光板５に傷や汚れがあるかどうかのチェックとが行われる。このとき、マスキングフィルム３Ｂのヘイズが４０％以下と低いため、マスキングフィルム３Ｂ側からでもドットパターン４の状態、ドットパターン印刷導光板５に存在する傷や汚れが確実に見えるようになる。   Thereafter, the dot pattern printing light guide plate 5 is inspected. Specifically, a check of the printing unit is performed to check whether the dot pattern 4 is not chipped or blurred, and a check is performed to determine whether the dot pattern printing light guide plate 5 is scratched or dirty. At this time, since the haze of the masking film 3B is as low as 40% or less, the state of the dot pattern 4 and the scratches and dirt existing on the dot pattern printing light guide plate 5 can be surely seen even from the masking film 3B side.

なお、ドットパターン印刷導光板５が液晶表示装置に組み込まれるときは、導光板原板２の非印刷面２ｂに貼合されたマスキングフィルム３Ｂが剥離される。   When the dot pattern printing light guide plate 5 is incorporated into the liquid crystal display device, the masking film 3B bonded to the non-printing surface 2b of the light guide plate original plate 2 is peeled off.

以上のように本実施形態にあっては、マスキングフィルム３Ａ，３Ｂのヘイズを４０％以下としたので、所望の透明性を有するマスキングフィルム３Ａ，３Ｂが得られる。このため、ドットパターン印刷導光板５の検査時に、ドットパターンの不具合、ドットパターン印刷導光板５に存在する傷や汚れが見えやすくなる。これにより、近年における液晶表示装置の画面の大型化にかかわらず、検査に長い時間をかけずに済み、検査にかかる負担を軽減することができる。また、ドットパターンの不具合、ドットパターン印刷導光板５に存在する傷や汚れの見落としが起きにくくなるため、不良品の流出が抑制されるようになる。従って、高品質のドットパターン印刷導光板５を安定して提供することができる。   As described above, in the present embodiment, since the haze of the masking films 3A and 3B is set to 40% or less, the masking films 3A and 3B having desired transparency can be obtained. For this reason, when the dot pattern printing light guide plate 5 is inspected, defects in the dot pattern and scratches and dirt existing on the dot pattern printing light guide plate 5 are easily visible. Accordingly, it is possible to reduce the burden on the inspection without spending a long time for the inspection regardless of the increase in the size of the screen of the liquid crystal display device in recent years. Moreover, since it becomes difficult for the defect of a dot pattern and the oversight of the flaw and stain | pollution | contamination which exist in the dot pattern printing light-guide plate 5 to occur, the outflow of inferior goods comes to be suppressed. Therefore, the high quality dot pattern printed light guide plate 5 can be provided stably.

以下、本発明に係わるマスキングフィルム貼合導光板原板及びドットパターン印刷導光板の一実施例について説明する。   Hereinafter, an embodiment of a masking film-bonded light guide plate original plate and a dot pattern printing light guide plate according to the present invention will be described.

（１）実施例
表１に示すような実施例１，２のマスキングフィルムを用意した。実施例１のマスキングフィルム（フィルムＡ、東レフィルム加工株式会社製、「トレテック 7232」）では、基材がＰＯ樹脂で形成され、粘着層がＥＶＡで形成され、厚みが８０μｍであり、ヘイズが２１．９％である。実施例２のマスキングフィルム（フィルムＢ、Novacel社製、「9088」）では、基材及び粘着層の材質が不明であり、厚みが８５μｍであり、ヘイズが３４．４％である。なお、ヘイズは、ＪＩＳ Ｋ７１３６に準拠した方法により測定した。

Figure 2013020810
(1) Examples Masking films of Examples 1 and 2 as shown in Table 1 were prepared. In the masking film of Example 1 (Film A, manufactured by Toray Film Processing Co., Ltd., “Tretec 7232”), the base material is formed of PO resin, the adhesive layer is formed of EVA, the thickness is 80 μm, and the haze is 21 .9%. In the masking film of Example 2 (film B, manufactured by Novcel, “9088”), the material of the base material and the adhesive layer is unknown, the thickness is 85 μm, and the haze is 34.4%. The haze was measured by a method based on JIS K7136.
Figure 2013020810

これらのマスキングフィルムを別に作製した導光板原板の両面に貼合して、マスキングフィルム貼合導光板原板を得た。なお、導光板原板の材質としては、ＰＭＭＡ（住友化学株式会社製「スミペックスＥＸＮ」）を用いた。そして、導光板原板の印刷面に貼合されたマスキングフィルムを剥離した後、印刷面に溶剤インクでドットパターンを印刷した。そして、ドットパターンが印刷された導光板原板を５５℃の乾燥炉で２５分加熱して、溶剤インクを乾燥させることにより、ドットパターン印刷導光板を得た。   These masking films were bonded to both surfaces of a separately prepared light guide plate original plate to obtain a masking film bonded light guide plate original plate. In addition, as a material of the light guide plate original plate, PMMA (“SUMIPEX EXN” manufactured by Sumitomo Chemical Co., Ltd.) was used. And after peeling the masking film bonded on the printing surface of the light-guide plate original plate, the dot pattern was printed with the solvent ink on the printing surface. And the dot pattern printing light-guide plate was obtained by heating the light-guide plate original plate on which the dot pattern was printed by a 55 degreeC drying furnace for 25 minutes, and drying solvent ink.

このようにして作製されたドットパターン印刷導光板について、マスキングフィルム側からドットパターンが目視で鮮明に見えるかどうかを確認した。表１に示す通り、実施例１，２のマスキングフィルムでは、ドットパターンを鮮明に見ることができた。   About the dot pattern printing light-guide plate produced in this way, it was confirmed whether a dot pattern looked clear visually from the masking film side. As shown in Table 1, in the masking films of Examples 1 and 2, the dot pattern could be seen clearly.

（２）比較例
表１に示すような比較例１のマスキングフィルムを用意した。比較例１のマスキングフィルム（フィルムＣ、トレディガー社製）では、基材がＰＯ樹脂で形成され、粘着層がＰＯエラストマーで形成され、厚みが８０μｍであり、ヘイズが５４．６％である。 (2) Comparative Example A masking film of Comparative Example 1 as shown in Table 1 was prepared. In the masking film of Comparative Example 1 (Film C, manufactured by Tolediger), the substrate is formed of PO resin, the adhesive layer is formed of PO elastomer, the thickness is 80 μm, and the haze is 54.6%.

このマスキングフィルムを使用し、上記実施例１，２と同様にしてドットパターン印刷導光板を得た。そして、そのドットパターン印刷導光板について、マスキングフィルム側からドットパターンが目視で鮮明に見えるかどうかを確認した。表１に示す通り、比較例１のマスキングフィルムでは、マスキングフィルムがドットパターンの色と重なったため、ドットパターンが見えにくかった。   Using this masking film, a dot pattern printing light guide plate was obtained in the same manner as in Examples 1 and 2 above. And about the dot pattern printing light-guide plate, it was confirmed whether a dot pattern looked clear visually from the masking film side. As shown in Table 1, in the masking film of Comparative Example 1, since the masking film overlapped with the color of the dot pattern, the dot pattern was difficult to see.

（３）評価
表１から明らかなように、実施例１，２では、マスキングフィルムのヘイズが４０％以下と低いため、印刷物の検査を目視で行うことができた。一方、比較例１では、マスキングフィルムのヘイズが４０％よりも大きいため、印刷物の検査を目視で行うことが困難であった。 (3) Evaluation As is clear from Table 1, in Examples 1 and 2, the haze of the masking film was as low as 40% or less, so that the printed matter could be inspected visually. On the other hand, in Comparative Example 1, since the haze of the masking film was larger than 40%, it was difficult to visually inspect the printed matter.

以上により、マスキングフィルムのヘイズを４０％以下にするという本発明の有効性を実証することができた。   From the above, the effectiveness of the present invention that the haze of the masking film is 40% or less could be verified.

１…マスキングフィルム貼合導光板原板、２…導光板原板、３Ａ，３Ｂ…マスキングフィルム、４…ドットパターン、５…ドットパターン印刷導光板。   DESCRIPTION OF SYMBOLS 1 ... Masking film bonding light guide plate original plate, 2 ... Light guide plate original plate, 3A, 3B ... Masking film, 4 ... Dot pattern, 5 ... Dot pattern printing light guide plate.

Claims (2)

導光板原板の表面にマスキングフィルムが貼合されてなるマスキングフィルム貼合導光板原板であって、
前記マスキングフィルムのヘイズが４０％以下であることを特徴とするマスキングフィルム貼合導光板原板。 It is a masking film-bonded light guide plate original plate in which a masking film is bonded to the surface of the light guide plate original plate,
The masking film-bonded light guide plate original plate, wherein the masking film has a haze of 40% or less. 導光板原板の一面にドットパターンが印刷され、前記導光板原板の他面にマスキングフィルムが貼合されてなるドットパターン印刷導光板であって、
前記マスキングフィルムのヘイズが４０％以下であることを特徴とするドットパターン印刷導光板。
A dot pattern printing light guide plate in which a dot pattern is printed on one surface of a light guide plate original plate and a masking film is bonded to the other surface of the light guide plate original plate,
A haze of the masking film is 40% or less.
JP2011153187A 2011-07-11 2011-07-11 Dot pattern printing light guide plate Expired - Fee Related JP5391238B2 (en)

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