JP6741541B2 - Screen film for projection that allows writing/erasing with a writing marker - Google Patents

Screen film for projection that allows writing/erasing with a writing marker Download PDF

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JP6741541B2
JP6741541B2 JP2016189630A JP2016189630A JP6741541B2 JP 6741541 B2 JP6741541 B2 JP 6741541B2 JP 2016189630 A JP2016189630 A JP 2016189630A JP 2016189630 A JP2016189630 A JP 2016189630A JP 6741541 B2 JP6741541 B2 JP 6741541B2
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義将 道家
義将 道家
成瀬 達也
達也 成瀬
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Kuraray Plastics Co Ltd
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Description

本発明は、映写面に筆記マーカーによる筆記や消去が可能な映写用スクリーンフィルムに関する。 The present invention relates to a projection screen film capable of writing and erasing with a writing marker on a projection surface.

近年、パーソナルコンピューター等に接続されたプロジェクター装置からデータを映写するとともに、ホワイトボード用マーカーによる書き込み及び消去を行うことができるスクリーンシートが利用されている。 2. Description of the Related Art In recent years, there has been used a screen sheet capable of projecting data from a projector device connected to a personal computer or the like and performing writing and erasing with a whiteboard marker.

従来のスクリーンシートの特徴として、エンボス加工や粒子などにより表面に凹凸を設け、プロジェクターからの映写光を拡散反射させることで、正規反射光のギラツキ(ホットスポット)を少なくし、さらに視野角を広げている。またその最表面にホワイトボード用マーカーで筆記及び消去可能な樹脂層を設けたスクリーンとしている。この種のスクリーンとして、ホワイトボードとして使用できるとともに、映写用スクリーンとしても使用可能なホワイトボード及び映写用スクリーン兼用フィルムが開示されている。具体的には表面の光沢を少なくし、かつ映写面にマーカーで書き込みや消去ができるように、白色合成樹脂フィルムの表面を微細凹凸面とするとともに、この微細凹凸面に硬質ハードコート層を被覆してなるものである(例えば、特許文献1、2参照。)。 As a feature of conventional screen sheets, unevenness is provided on the surface by embossing or particles, and diffused reflection of projection light from the projector reduces glare (hot spots) of regular reflection light and further widens the viewing angle. ing. The outermost surface of the screen has a resin layer on which a whiteboard marker can be written and erased. As this type of screen, a whiteboard and a film for projection screen which can be used as a whiteboard and also as a projection screen are disclosed. Specifically, the surface of the white synthetic resin film is made into a fine uneven surface, and a hard hard coat layer is coated on this fine uneven surface so that the surface gloss can be reduced and writing and erasing can be done with a marker on the projection surface. (See, for example, Patent Documents 1 and 2).

特許文献1のような構成のフィルムは表面が微細凹凸面であることから、光の拡散反射性には優れており、鮮明な映写画像を得ることができるが、ホワイトボードとして利用した場合、マーカーのインクが表面の微細凹部に残存してしまい、ホワイトボード上の筆記インクをきれいに消去することが困難であった。その結果、繰り返し使用すると完全に消去しきれなかったインクの蓄積によりホワイトボードが汚れてしまい、使用に耐えなくなるという課題があった。また、表面凹凸が微細であるために、イレーサーで消去する際に摩擦抵抗が大きくなり、使用者への負担が大きく消去しにくいという問題もあった。 Since the surface of the film having the structure as disclosed in Patent Document 1 is a fine uneven surface, it is excellent in diffuse reflectance of light and a clear projected image can be obtained, but when used as a whiteboard, a marker is used. Of the ink remained in the fine recesses on the surface, and it was difficult to cleanly erase the writing ink on the whiteboard. As a result, there is a problem that the whiteboard becomes dirty due to the accumulation of ink that cannot be completely erased after repeated use, and the whiteboard becomes unusable. Further, since the surface unevenness is minute, there is a problem that the friction resistance becomes large when erasing with an eraser, which imposes a heavy burden on the user and is difficult to erase.

一方、特許文献2のようにフィルムへの粗いエンボス加工により表面凹凸をより平坦にした場合、マーカーのインクの拭き取りは良好に行えるものの、光の拡散反射性が低下し、映し出された映像の中央にホットスポットが発生し、映写性が低下してしまうという問題があった。つまり、ホワイトボードの表面を映写面として利用する場合には、光の拡散反射性を向上させなければならないとともに、マーカーによる筆記を行った場合に、イレーサーによりインクを完全に除去しなければならず、その技術的構成において相反するという課題があった。 On the other hand, when the surface unevenness is made even more flat by rough embossing on the film as in Patent Document 2, the marker ink can be wiped off well, but the diffuse reflectance of light is reduced and the center of the projected image is reduced. However, there is a problem that hot spots occur and the projection property is deteriorated. In other words, when using the surface of the whiteboard as a projection surface, it is necessary to improve the diffuse reflectance of light and to completely remove the ink by the eraser when writing with a marker. However, there was a problem that their technical configurations conflicted with each other.

特許第5108981号公報Japanese Patent No. 5108981 特許第3940294号公報Japanese Patent No. 3940294

本発明は上記従来の課題を解決するものであり、映写に適した光の拡散反射性を有し、ホットスポットを生じず、視野角が広く鮮明な映写画像を得ることが可能、かつマーカーインクの消去を良好に行うことができる映写用スクリーンフィルムを提供することを目的とする。 The present invention is to solve the above-mentioned conventional problems, has a diffuse reflectance of light suitable for projection, does not generate hot spots, it is possible to obtain a clear projection image with a wide viewing angle, and a marker ink It is an object of the present invention to provide a projection screen film capable of satisfactorily erasing.

本発明者等は、上記課題を解決すべく鋭意検討した結果、熱可塑性樹脂で構成される基材に、特定の微粒子が含有した紫外線硬化樹脂の硬化膜を形成させることにより、フィルムの最表面に筆記マーカーで筆記や消去が可能な映写用スクリーンフィルムが得られることを見出し、本発明を完成させた。 As a result of intensive studies to solve the above problems, the present inventors formed a cured film of an ultraviolet curable resin containing specific fine particles on a substrate composed of a thermoplastic resin, thereby forming the outermost surface of the film. The present invention has been completed by finding that a projection screen film capable of writing and erasing with a writing marker can be obtained.

すなわち本発明は、熱可塑性樹脂で構成される基材(A)に、平均粒子径2〜12μmの微粒子が紫外線硬化樹脂100質量部に対して15〜150質量部含有されてなる紫外線硬化樹脂の硬化膜(B)が形成された映写用スクリーンフィルムであり、好ましくは硬化膜(B)中において、前記微粒子が紫外線硬化樹脂100質量部に対して15〜60質量部含有されてなる上記の映写用スクリーンフィルムであり、より好ましくは硬化膜(B)中において、前記微粒子の平均粒子径が2〜5μmである上記の映写用スクリーンフィルムであり、さらに好ましくは前記紫外線硬化樹脂がフッ素またはシリコーン化合物を含む上記の映写用スクリーンフィルムである。
That is, the present invention relates to an ultraviolet curable resin comprising a base material (A) made of a thermoplastic resin and 15 to 150 parts by mass of fine particles having an average particle diameter of 2 to 12 μm with respect to 100 parts by mass of the ultraviolet curable resin. A projection screen film having a cured film (B) formed thereon, wherein the fine particles are contained in the cured film (B) in an amount of 15 to 60 parts by mass based on 100 parts by mass of the ultraviolet curable resin. Screen film, more preferably the above-mentioned projection screen film having an average particle diameter of the fine particles of 2 to 5 μm in the cured film (B), and more preferably the ultraviolet curable resin is a fluorine or silicone compound. Is the above-mentioned projection screen film including.

さらに本発明は、好ましくは前記硬化膜(B)を形成した面とは反対の基材面に接着剤層を形成した上記の映写用スクリーンフィルムであり、より好ましくは接着剤層が粘着剤で形成された上記の映写用スクリーンフィルムであり、さらに好ましくは前記接着剤層を介してマグネットシートを積層した上記の映写用スクリーンフィルムである。 Furthermore, the present invention is preferably the above-mentioned projection screen film, wherein an adhesive layer is formed on the surface of the substrate opposite to the surface on which the cured film (B) is formed, and more preferably the adhesive layer is a pressure sensitive adhesive. The projection screen film formed as described above, and more preferably the projection screen film described above in which a magnet sheet is laminated via the adhesive layer.

本発明の映写用スクリーンフィルムは、プロジェクター光の拡散反射性が高くなり、60°グロス値を測定した場合1〜40であり、ホットスポットが発生しないとともに、スクリーンゲインを測定した際の最も高いゲイン(ピークゲイン)の半分のゲインとなる角度(半値角)が大きくなり視野角が広くなる。さらに硬化膜を形成した面とは反対の基材面に接着剤層を形成させることで、一時的な設置・取り外しを容易に行うことができる。 The projection screen film of the present invention has a high diffuse reflectance of projector light and has a value of 1 to 40 when a 60° gloss value is measured. A hot spot does not occur, and the highest gain when the screen gain is measured. The angle at which the gain is half the (peak gain) (half-value angle) becomes large and the viewing angle becomes wide. Furthermore, by forming the adhesive layer on the surface of the base material opposite to the surface on which the cured film is formed, temporary installation/removal can be easily performed.

本発明の映写性スクリーンフィルムは、熱可塑性樹脂で構成される基材(A)に微粒子が含有した紫外線硬化樹脂の硬化膜(B)が形成されている。硬化膜(B)に含有する微粒子は平均粒子径が2〜12μm、好ましくは2〜10μm、より好ましくは2〜5μmであり、紫外線硬化樹脂100質量部に対して15〜150質量部、好ましくは5〜100質量部、より好ましくは15〜60質量部含有されていることが必要である。これらの条件とすることで、より滑性が良好な凹凸表面が形成されるので、筆記性に加え消去性が一層向上するという優れた効果を奏する。これらの場合、プロジェクター光の拡散反射性が高く、60°グロス値が40以下、好ましくは1〜40であり、ホットスポットが発生せず視野角が広くなる。一方、微粒子の平均粒子径が2μm未満、あるいは微粒子の含有量が紫外線硬化樹脂100質量部に対して1質量部未満の場合、フィルム最表面に凹凸が十分に形成されないためにプロジェクター光の拡散反射性が低く、60°グロス値を測定した場合41以上となり、ホットスポットが発生し、視野角が狭い。また、微粒子の平均粒子径が12μmよりも大きい、または微粒子の含有量が紫外線硬化樹脂100質量部に対して150質量部より多い場合、ホワイトボードマーカーで筆記した際、凹凸の間にインクが入り込み除去不可能となる。
In the projective screen film of the present invention, a cured film (B) of an ultraviolet curable resin containing fine particles is formed on a base material (A) made of a thermoplastic resin. The fine particles contained in the cured film (B) have an average particle diameter of 2 to 12 μm, preferably 2 to 10 μm, more preferably 2 to 5 μm, and 15 to 150 parts by mass, preferably 100 parts by mass of the ultraviolet curable resin. It is necessary to contain 5 to 100 parts by mass, more preferably 15 to 60 parts by mass. By setting these conditions, an uneven surface having better lubricity is formed, and therefore, it has an excellent effect that the erasability is further improved in addition to the writing property. In these cases, the diffuse reflectance of the projector light is high, and the 60° gloss value is 40 or less, preferably 1 to 40, and hot spots do not occur and the viewing angle becomes wide. On the other hand, when the average particle size of the fine particles is less than 2 μm or the content of the fine particles is less than 1 part by mass with respect to 100 parts by mass of the ultraviolet curable resin, unevenness is not sufficiently formed on the outermost surface of the film, and thus diffuse reflection of projector light is performed. When the 60° gloss value is measured, it is 41 or more, a hot spot occurs and the viewing angle is narrow. In addition, when the average particle size of the fine particles is larger than 12 μm or the content of the fine particles is more than 150 parts by mass with respect to 100 parts by mass of the ultraviolet curable resin, when writing with a whiteboard marker, ink may enter between the irregularities. It cannot be removed.

また、本発明の映写性スクリーンフィルムにおいて、基材(A)を構成する熱可塑性樹脂としては、特に限定されないが、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレートなどのポリエステル、ポリエチレン、ポリブロピレンなどのポリオレフィン、などが挙げられ、さらに前記樹脂を白色に着色したものが好適に用いられ、例えば、東洋紡株式会社製「クリスパーシリーズ」、三菱樹脂株式会社製「ダイヤホイルW400」等が挙げられる。また基材(A)の厚みは20〜250μmであることが好ましく、40〜200μmであることがより好ましい。 Further, in the projective screen film of the present invention, the thermoplastic resin constituting the substrate (A) is not particularly limited, but polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate and other polyesters, polyethylene, polyolefin such as polypropylene and the like. Further, those obtained by coloring the above resin in white are preferably used, and examples thereof include "Crisper series" manufactured by Toyobo Co., Ltd., "Diafoil W400" manufactured by Mitsubishi Plastics Co., Ltd., and the like. The thickness of the base material (A) is preferably 20 to 250 μm, more preferably 40 to 200 μm.

さらに、本発明の映写性スクリーンフィルムにおいて、硬化膜(B)を構成する紫外線硬化樹脂は硬質であり耐擦傷性が高く、スクリーン表面が傷つきにくいという種々の優れた効果を奏する。それに対し従来の熱硬化性架橋樹脂では、初期の消字性は得られるが、本発明の紫外線硬化樹脂に比べて硬度が低いため耐擦傷性が不十分であり、イレーサーで繰り返し消字した際に表面が傷つき、消字性が低下する。本発明で用いる紫外線硬化樹脂としては、アクリル系、エポキシ系、ウレタン系、さらにそれらのシリコーンやフッ素変性オリゴマー、またはモノマー、さらに光重合開始剤を含む樹脂が挙げられる。これらの具体例としては特に限定されるものではないが、DICグラフィックス株式会社製「UVTクリヤーシリーズ」、東洋インキ株式会社製「リオデュラスシリーズ」、根上工業株式会社製「アートレジンシリーズ」などが挙げられる。 Further, in the projection screen film of the present invention, the ultraviolet curable resin constituting the cured film (B) is hard, has high scratch resistance, and has various excellent effects that the screen surface is not easily scratched. On the other hand, in the conventional thermosetting cross-linking resin, the initial erasability can be obtained, but since the hardness is lower than the ultraviolet curable resin of the present invention, the scratch resistance is insufficient, and when repeatedly erased with an eraser. The surface is scratched and the erasability deteriorates. Examples of the ultraviolet curable resin used in the present invention include acrylic resins, epoxy resins, urethane resins, and resins containing silicone or fluorine-modified oligomers or monomers thereof, and a photopolymerization initiator. Specific examples thereof include, but are not limited to, "UVT clear series" manufactured by DIC Graphics Co., Ltd., "Rioduras series" manufactured by Toyo Ink Co., Ltd., "Art Resin Series" manufactured by Negami Kogyo Co., Ltd., and the like. Can be mentioned.

また、前記紫外線硬化樹脂に添加する微粒子としては、ポリエチレン、ポリプロピレン、アクリルなどの樹脂からなる粒子、ガラス、シリカ、チタン化合物、ジルコニウム化合物、アルミナなどの無機微粒子が挙げられる。これらの具体例としては特に限定されるものではないが、三井化学株式会社製「ミペロンシリーズ」、東洋紡株式会社製「タフチックシリーズ」、根上工業株式会社製「アートパール」、ユニチカ株式会社製「ユニビーズシリーズ」、富士シリシア化学株式会社製「サイリシアシリーズ」、チタン工業株式会社製「KRONOS酸化チタンシリーズ」、堺化学工業株式会社製「酸化ジルコニウム分散液SZRシリーズ」などが挙げられる。 Examples of the fine particles added to the ultraviolet curable resin include particles made of resins such as polyethylene, polypropylene and acrylic, and inorganic fine particles such as glass, silica, titanium compounds, zirconium compounds and alumina. Specific examples thereof are not particularly limited, but include "Miperon series" manufactured by Mitsui Chemicals, Inc., "Tough tick series" manufactured by Toyobo Co., Ltd., "Art Pearl" manufactured by Negami Kogyo Co., Ltd., and Unitika Co., Ltd. Examples include "Unibeads series", "Silysia series" manufactured by Fuji Silysia Chemical Ltd., "KRONOS titanium oxide series" manufactured by Titanium Industry Co., Ltd., "Zirconium oxide dispersion SZR series" manufactured by Sakai Chemical Industry Co., Ltd., and the like.

さらに本発明においては、前記紫外線硬化樹脂にフッ素系またはシリコーン系化合物を含有させることで、フィルム表面の滑性の向上と筆記マーカーと前記硬化膜(B)面との親和性を低下させることにより消字性を向上させることができる。フッ素系化合物としてはDIC株式会社製「メガファックシリーズ」、シリコーン系化合物としてはビックケミー・ジャパン株式会社製「BYKシリーズ」、などが挙げられる。 Further, in the present invention, by containing a fluorine-based or silicone-based compound in the ultraviolet curable resin, it is possible to improve the lubricity of the film surface and reduce the affinity between the writing marker and the cured film (B) surface. It is possible to improve erasability. Examples of fluorine compounds include "Megafuck series" manufactured by DIC Corporation, examples of silicone compounds include "BYK series" manufactured by BYK Japan KK.

前記硬化膜(B)を基材(A)に形成させる方法としては、紫外線硬化樹脂の未硬化樹脂液100質量部に対し微粒子を1〜150質量部混合した混合液を、ロールコーター、バーコーター、グラビアコーターなどの公知の装置を用いて塗工し、紫外線照射することで、硬化させる方法がある。硬化膜(B)の塗工量としては1〜10g/mであることが好ましく、2〜5g/mであることがより好ましい。 As a method for forming the cured film (B) on the base material (A), a roll coater or a bar coater may be used which is a mixed solution prepared by mixing 1 to 150 parts by mass of fine particles with 100 parts by mass of an uncured resin liquid of an ultraviolet curing resin. , A gravure coater or the like is used for coating, and ultraviolet irradiation is performed to cure the coating. The coating amount of the cured film (B) is preferably 1 to 10 g/m 2 , and more preferably 2 to 5 g/m 2 .

また本発明においては、前記硬化膜(B)を形成した面とは反対の基材面に接着剤層を形成させることが好ましく、接着剤層が粘着剤により形成されることがより好ましい。このような接着剤層を形成されることにより壁面やパーテーションなど、様々な場所に上記スクリーンフィルムを設置することができ、特に粘着剤として再剥離性粘着剤を使用した場合、一時的な設置・取り外しが容易に行えるので望ましい。 Further, in the present invention, it is preferable to form an adhesive layer on the surface of the base material opposite to the surface on which the cured film (B) is formed, and it is more preferable that the adhesive layer is formed of a pressure-sensitive adhesive. By forming such an adhesive layer, it is possible to install the screen film in various places such as wall surfaces and partitions, and especially when a removable adhesive is used as the adhesive, temporary installation/ It is desirable because it can be easily removed.

粘着剤としては、恒久的な接着を目的とした強粘着剤や、一時的接着を目的とした再剥離性粘着剤などを使用するのが好ましく、例えば、サイデン化学株式会社製「サンビノールシリーズ」、綜研化学株式会社製「SKダイシンシリーズ」、トーヨーケム株式会社製「オリバインシリーズ」などが挙げられる。 As the pressure-sensitive adhesive, it is preferable to use a strong pressure-sensitive adhesive for permanent adhesion, or a removable pressure-sensitive adhesive for temporary adhesion, for example, "Sanbinol series" manufactured by Saiden Chemical Co., Ltd. , "SK Daishin series" manufactured by Soken Chemical Co., Ltd., "Olivine series" manufactured by Toyochem Co., Ltd., and the like.

さらに本発明においては、前記接着剤層を介してマグネットシートを積層した場合も同様に黒板や金属製パーテーションなど様々な場所に簡便に設置・取り外しを行うことができる。本発明で使用するマグネットシートとしては、厚み0.1〜5.0mmの厚みのマグネットシートを用いるのが好ましい。マグネットシートの具体例としては、株式会社マグエックス製「マグネットベースシートシリーズ」、シーアイ化成株式会社製「異方性マグネットシートシリーズ」などが挙げられる。 Further, in the present invention, even when the magnet sheets are laminated via the adhesive layer, they can be easily installed/removed in various places such as a blackboard or a metal partition. As the magnet sheet used in the present invention, it is preferable to use a magnet sheet having a thickness of 0.1 to 5.0 mm. Specific examples of the magnet sheet include "Magnet Base Sheet Series" manufactured by Magex Co., Ltd., "Anisotropic Magnet Sheet Series" manufactured by CI Kasei Co., Ltd., and the like.

この場合、接着剤としてはウレタン、アクリルなどの樹脂からなるヒートシール剤を使用してもよく、低温(例えば、150℃以下)でヒートシール性を発現するものがより好ましい。接着剤層の厚みとしては1〜20μm程度形成されるのが好ましい。接着剤の具体例としては特に限定されるものではないが、DIC株式会社製「ディックシールシリーズ」や「ディックドライシリーズ」、ユニチカ株式会社製「アローベースシリーズ」等が挙げられる。 In this case, as the adhesive, a heat-sealing agent made of a resin such as urethane or acrylic may be used, and a material which exhibits heat-sealing property at low temperature (for example, 150° C. or lower) is more preferable. The thickness of the adhesive layer is preferably about 1 to 20 μm. Specific examples of the adhesive include, but are not limited to, "Dick Seal Series" and "Dick Dry Series" manufactured by DIC Corporation, and "Arrow Base Series" manufactured by Unitika Corporation.

以下、本発明について、実施例を挙げてさらに具体的に説明する。なお、本発明は実施例の記載によって限定されるものではない。 Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is not limited to the description of the embodiments.

<映写性:スクリーン表面の60°グロス>
光沢度計(株式会社堀場製作所製、GLOSS CHECKER IG−320)を用いて測定した。
<Projectability: 60° gloss on screen surface>
It was measured using a gloss meter (GLOSS CHECKER IG-320, manufactured by Horiba Ltd.).

<映写性:ホットスポット>
短焦点プロジェクター(日立製作所社製、CP−A300N)でスクリーン表面に映像を映写したときホットスポットがなく映像が問題なく目視できる場合を「○」、映像は目視できるが、ややホットスポットが見える場合を「○△」、ホットスポットが眩しく映像が見えづらい場合を「×」とした。
<Projectability: hot spot>
When the image is projected on the screen surface with a short focus projector (CP-A300N manufactured by Hitachi, Ltd.), there is no hot spot and the image can be viewed without any problems, "○", the image can be viewed but the hot spot is slightly visible. Was evaluated as "○△", and when the hot spot was dazzling and the image was difficult to see, it was evaluated as "X".

<消字性>
ホワイトボードマーカー(ホワイトボードマーカーuniお知らセンサー 黒)で約5cmの直線を筆記後、室温で放置して乾燥させ、その後ホワイトボードイレーサー(株式会社青井黒板製作所製、スクールソフトイレーザー)で擦り、筆記インクを消去した時の表面の汚れ具合を目視で確認して、汚れの残っていない場合を「○」、薄い汚れが残ったものを「○△」、目立つ汚れが残ったものを「△」、汚れの残る場合を「×」とした。
<erasability>
Write a straight line of about 5 cm with a whiteboard marker (whiteboard marker uni known sensor black), leave it at room temperature to dry, and then rub it with a whiteboard eraser (Schoolsoft eraser made by Aoi Blackboard Co., Ltd.) Visually check the degree of dirt on the surface when the ink is erased. If there is no dirt remaining, it is "○", if there is light dirt, it is "○△", and if there is noticeable dirt, it is "△". When the stain remained, it was marked as "x".

参考例1、実施例1
紫外線硬化樹脂(帝国インキ社製、UVOS−90202 KRクリアー)100質量部に対して、平均粒子径が2μmの架橋アクリル樹脂(積水化成品工業株式会社製、テクポリマーMBX−2H)を2質量部(参考例1)、または15質量部(実施例)添加した混合液を基材(A)である厚み75μmの白色ポリエチレンテレフタレート樹脂(東洋紡社製、クリスパーK2411)の鏡面側に1〜10g/m2塗布して、紫外線照射して硬化させて、硬化膜(B)を形成させ、映写性スクリーンフィルムを得た。消字性と映写性の評価結果を表1に示す。
< Reference Example 1, Example 1 >
2 parts by mass of a cross-linked acrylic resin having an average particle diameter of 2 μm (Techpolymer MBX-2H manufactured by Sekisui Plastics Co., Ltd.) per 100 parts by mass of an ultraviolet curable resin (UVOS-90202 KR Clear manufactured by Teikoku Ink Co., Ltd.) ( Reference Example 1 ), or 15 parts by mass (Example 1 ) of the mixed solution was added to the mirror surface side of the substrate (A) of a white polyethylene terephthalate resin (Crysper K2411 manufactured by Toyobo Co., Ltd.) having a thickness of 75 μm at 1 to 10 g/ m2 was applied and cured by irradiating with ultraviolet rays to form a cured film (B) to obtain a projection screen film. Table 1 shows the evaluation results of the erasability and the projection property.

<実施例
実施例1と同様の紫外線硬化樹脂100質量部に対して、平均粒子径が5μmの架橋アクリル樹脂(積水化成品工業株式会社製、テクポリマーMB30X−5)を30質量部(実施例)、または60質量部(実施例)、100質量部(実施例)、150質量部(実施例)添加した混合液を用いた以外は実施例1と同様の条件で製造して映写性スクリーンフィルムを得た。消字性と映写性の評価結果を表1に示す。
<Examples 2 to 5 >
30 parts by mass of a crosslinked acrylic resin having an average particle diameter of 5 μm (Techpolymer MB30X-5, manufactured by Sekisui Plastics Co., Ltd.) with respect to 100 parts by mass of the same ultraviolet curable resin as in Example 1 (Example 2 ), Alternatively, a projection screen was produced under the same conditions as in Example 1 except that a mixed solution containing 60 parts by mass (Example 3 ), 100 parts by mass (Example 4 ) and 150 parts by mass (Example 5 ) was used. I got a film. Table 1 shows the evaluation results of the erasability and the projection property.

<実施例
実施例1と同様の紫外線硬化樹脂100質量部に対して、平均粒子径が12μmの架橋アクリル樹脂(積水化成品工業株式会社製、テクポリマーMB30X−10)を15質量部添加した混合液を用いた以外は実施例1と同様の条件で製造して映写性スクリーンフィルムを得た。消字性と映写性の評価結果を表1に示す。
<Example 6 >
For 100 parts by mass of the same UV curable resin as in Example 1, 15 parts by mass of a crosslinked acrylic resin having an average particle diameter of 12 μm (Techpolymer MB30X-10, manufactured by Sekisui Plastics Co., Ltd.) was used. A projection screen film was obtained by manufacturing under the same conditions as in Example 1 except for the above. Table 1 shows the evaluation results of the erasability and the projection property.

<比較例1>
実施例1と同様の紫外線硬化樹脂100質量部に対して、平均粒子径が0.5μmのシリカ微粒子(CIKナノテック社製、SIRMIBK15WT%−H50)を15質量部添加した混合液を用いた以外は実施例1と同様の条件で製造して映写性スクリーンフィルムを得た。消字性と映写性の評価結果を表2に示す。
<Comparative Example 1>
Except for using 100 parts by mass of the same ultraviolet curable resin as in Example 1, 15 parts by mass of silica fine particles having an average particle diameter of 0.5 μm (manufactured by CIK Nanotech, SIRMIBK15WT%-H50) were used. A projection screen film was obtained by manufacturing under the same conditions as in Example 1. Table 2 shows the evaluation results of the erasability and the projection property.

<比較例2〜4>
実施例1と同様の紫外線硬化樹脂100質量部に対して、平均粒子径が20μmの架橋アクリル微粒子(積水化成品工業株式会社製、テクポリマーMBX−20)を15質量部(比較例2)、60質量部(比較例3)、100質量部(比較例4)を添加した混合液を用いた以外は実施例1と同様の条件で製造して映写性スクリーンフィルムを得た。消字性と映写性の評価結果を表2に示す。
<Comparative Examples 2 to 4>
15 parts by mass of crosslinked acrylic fine particles having an average particle diameter of 20 μm (Techpolymer MBX-20, manufactured by Sekisui Plastics Co., Ltd.) with respect to 100 parts by mass of the same ultraviolet curable resin as in Example 1 (Comparative Example 2), A projection screen film was obtained under the same conditions as in Example 1 except that a mixed solution containing 60 parts by mass (Comparative Example 3) and 100 parts by mass (Comparative Example 4) was used. Table 2 shows the evaluation results of the erasability and the projection property.

<比較例5>
実施例1と同様の紫外線硬化樹脂100質量部に対して、平均粒子径が5μmの架橋アクリル微粒子(積水化成品工業株式会社製、テクポリマーMBX−5)を0.5質量部添加した混合液を用いた以外は実施例1と同様の条件で製造して映写性スクリーンフィルムを得た。消字性と映写性の評価結果を表2に示す。
<Comparative Example 5>
A mixed solution obtained by adding 0.5 parts by mass of crosslinked acrylic fine particles having an average particle diameter of 5 μm (Techpolymer MBX-5, manufactured by Sekisui Plastics Co., Ltd.) to 100 parts by mass of the same ultraviolet curable resin as in Example 1. A projecting screen film was obtained by manufacturing under the same conditions as in Example 1 except that was used. Table 2 shows the evaluation results of the erasability and the projection property.

<比較例6>
実施例1と同様の紫外線硬化樹脂100質量部に対して、平均粒子径が5μmの架橋アクリル微粒子(積水化成品工業株式会社製、テクポリマーMBX−5)を200質量部添加した混合液を用いた以外は実施例1と同様の条件で製造して映写性スクリーンフィルムを得た。消字性と映写性の評価結果を表2に示す。
<Comparative example 6>
For 100 parts by mass of the same ultraviolet curable resin as in Example 1, 200 parts by mass of crosslinked acrylic fine particles having an average particle size of 5 μm (Techpolymer MBX-5, manufactured by Sekisui Plastics Co., Ltd.) were used. A projection screen film was obtained by manufacturing under the same conditions as in Example 1 except for the above. Table 2 shows the evaluation results of the erasability and the projection property.

Figure 0006741541
Figure 0006741541

Figure 0006741541
Figure 0006741541

表1、表2の結果から明らかなように、基材(A)に、平均粒子径2〜12μmの微粒子が、紫外線硬化樹脂100質量部に対して15〜150質量部添加された硬化膜(B)が形成された実施例1〜のスクリーンフィルムは消字性および映写性に優れたものとなる。一方、硬化膜(B)中の微粒子の平均粒子径あるいは添加量が上記範囲を外れた比較例1〜6は消字性と映写性の両立は達成できない。
As is clear from the results of Table 1 and Table 2, a cured film ( 15 to 150 parts by mass of fine particles having an average particle size of 2 to 12 μm added to the base material (A) per 100 parts by mass of the ultraviolet curable resin ( The screen films of Examples 1 to 6 on which B) is formed have excellent erasability and projection properties. On the other hand, Comparative Examples 1 to 6 in which the average particle size or the addition amount of the fine particles in the cured film (B) is out of the above range cannot achieve both the erasability and the image projection property.

本発明の筆記マーカーで筆記・消字が可能な映写用スクリーンフィルムによれば、鮮明な映写画像を得ることが可能であり、かつマーカーインクの筆記・消去を良好に行うことができるのでホワイトボードと映写用スクリーン兼用フィルムなどに適用できる。 According to the projection screen film capable of writing/erasing with the writing marker of the present invention, a clear projected image can be obtained, and the writing/erasing of the marker ink can be satisfactorily performed. It can be applied to film that also serves as a projection screen.

本発明の映写用スクリーンフィルムの一例を表す断面模式図。FIG. 3 is a schematic sectional view showing an example of the projection screen film of the present invention.

A 基材
B 硬化膜



A base material B cured film



Claims (7)

熱可塑性樹脂で構成される基材(A)に、平均粒子径2〜12μmの微粒子が紫外線硬化樹脂100質量部に対して15〜150質量部含有されてなる紫外線硬化樹脂の硬化膜(B)が形成された映写用スクリーンフィルム。 A cured film (B) of an ultraviolet curable resin, in which 15 to 150 parts by mass of fine particles having an average particle diameter of 2 to 12 μm are contained in 100 parts by mass of the ultraviolet curable resin in a base material (A) composed of a thermoplastic resin. A projection screen film on which is formed. 硬化膜(B)中において、前記微粒子が紫外線硬化樹脂100質量部に対して15〜60質量部含有されてなる請求項1記載の映写用スクリーンフィルム。 The projection screen film according to claim 1, wherein the fine particles are contained in the cured film (B) in an amount of 15 to 60 parts by mass based on 100 parts by mass of the ultraviolet curable resin. 硬化膜(B)中において、前記微粒子の平均粒子径が2〜5μmである請求項1または2記載の映写用スクリーンフィルム。 The screen film for projection according to claim 1 or 2, wherein in the cured film (B), the average particle diameter of the fine particles is 2 to 5 µm. 紫外線硬化樹脂がフッ素またはシリコーン化合物を含む請求項1〜3のいずれか記載の映写用スクリーンフィルム。 The projection screen film according to claim 1, wherein the ultraviolet curable resin contains fluorine or a silicone compound. 前記硬化膜(B)を形成した面とは反対の基材面に接着剤層を形成した請求項1〜4のいずれか記載の映写用スクリーンフィルム。 The projection screen film according to any one of claims 1 to 4, wherein an adhesive layer is formed on the surface of the base material opposite to the surface on which the cured film (B) is formed. 接着剤層が粘着剤で形成された請求項5記載の映写用スクリーンフィルム。 The projection screen film according to claim 5, wherein the adhesive layer is formed of a pressure-sensitive adhesive. 前記接着剤層を介してマグネットシートを積層した請求項5または6記載の映写用スクリーンフィルム。 The projection screen film according to claim 5, wherein a magnet sheet is laminated via the adhesive layer.
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