JP2018054809A - Projection screen film writable/erasable with writing marker - Google Patents

Projection screen film writable/erasable with writing marker Download PDF

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JP2018054809A
JP2018054809A JP2016189630A JP2016189630A JP2018054809A JP 2018054809 A JP2018054809 A JP 2018054809A JP 2016189630 A JP2016189630 A JP 2016189630A JP 2016189630 A JP2016189630 A JP 2016189630A JP 2018054809 A JP2018054809 A JP 2018054809A
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projection screen
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JP6741541B2 (en
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義将 道家
Yoshimasa Doke
義将 道家
成瀬 達也
Tatsuya Naruse
達也 成瀬
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Kuraray Plastics Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a projection screen film capable of obtaining clear projection images having diffuse reflectivity of light suitable for projection with wide viewing angle without generating any hot spot, and capable of satisfactorily erasing marker ink therefrom.SOLUTION: The projection screen film includes: a base material (A) formed of a thermoplastic resin; and a cured film (B) of an ultraviolet light curable resin which contains fine particles of average particle diameter 2 to 12 μm by 1 to 150 pts.mass with respect to ultraviolet light curable resin 100 pts.mass.SELECTED DRAWING: Figure 1

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 that can be written and erased 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。   In recent years, a screen sheet that can project data from a projector device connected to a personal computer or the like and can be written and erased with a whiteboard marker has been used.

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 characteristic of conventional screen sheets, the surface is uneven by embossing or particles, and the projection light from the projector is diffusely reflected to reduce glare (hot spots) of regular reflected light and further widen the viewing angle. ing. Moreover, it is set as the screen which provided the resin layer which can be written in and erase | eliminated with the marker for whiteboards on the outermost surface. As this type of screen, a whiteboard and a projection screen combined film that 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 to be a fine concavo-convex surface and the hard rugged surface is coated on the fine concavo-convex surface so that the surface gloss is reduced and the projection surface can be written and erased with a marker. (For example, refer to 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 film having a structure as in Patent Document 1 has a fine uneven surface, the film has excellent diffuse reflection properties of light, and a clear projected image can be obtained. 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 has been a problem that the whiteboard becomes dirty due to the accumulation of ink that cannot be completely erased after repeated use, making it unusable. In addition, since the surface irregularities are fine, there is a problem that the frictional resistance increases when erasing with an eraser, and the burden on the user is large, making it 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 flatter by rough embossing on the film as in Patent Document 2, the marker ink can be wiped off well, but the diffuse reflectance of the light is reduced and the center of the projected image is reduced. There was a problem that a hot spot was generated and the projection performance was lowered. In other words, when using the whiteboard surface as a projection surface, the diffuse reflectance of light must be improved, and when writing with a marker, the ink must be completely removed by an eraser. , There was a problem of conflict in the technical configuration.

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 solves the above-described conventional problems, has a diffuse reflectance of light suitable for projection, does not cause hot spots, can provide a clear projection image with a wide viewing angle, and a marker ink. An object of the present invention is to provide a projection screen film that can be erased well.

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 have formed an outermost surface of a film by forming a cured film of an ultraviolet curable resin containing specific fine particles on a substrate composed of a thermoplastic resin. In addition, the present inventors have found that a projection screen film that can be written and erased with a writing marker can be obtained, thereby completing the present invention.

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1〜150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10〜60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 1 to 150 parts by mass of fine particles having an average particle diameter of 2 to 12 μm per 100 parts by mass of an ultraviolet curable resin in a base material (A) composed of a thermoplastic resin. A projection screen film on which a cured film (B) is formed, preferably the projection described above, wherein the fine particles are contained in the cured film (B) in an amount of 10 to 60 parts by mass with respect to 100 parts by mass of the ultraviolet curable resin. Screen film, more preferably the above-mentioned projection screen film in which the average particle diameter of the fine particles is 2 to 5 μm in the cured film (B), more preferably the ultraviolet curable resin is fluorine or a silicone compound. 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 in which an adhesive layer is formed on the base material surface opposite to the surface on which the cured film (B) is formed, 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 in which a magnetic 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 high diffuse reflectance of the projector light, and is 1 to 40 when a 60 ° gloss value is measured. No hot spot is generated and the highest gain when the screen gain is measured. The angle (half-value angle) at which the gain is half of (peak gain) is increased, and the viewing angle is increased. Furthermore, temporary installation and removal can be easily performed by forming an adhesive layer on the base material surface opposite to the surface on which the cured film is formed.

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1〜150質量部、好ましくは5〜100質量部、より好ましくは10〜60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 projection screen film of the present invention, a cured film (B) of an ultraviolet curable resin in which fine particles are contained in a base material (A) composed of a thermoplastic resin is formed. The fine particles contained in the cured film (B) have an average particle size of 2 to 12 μm, preferably 2 to 10 μm, more preferably 2 to 5 μm, and preferably 1 to 150 parts by weight, preferably 100 parts by weight of the ultraviolet curable resin. It is necessary to contain 5 to 100 parts by mass, more preferably 10 to 60 parts by mass. By setting it as these conditions, since the uneven | corrugated surface with more favorable lubricity is formed, there exists the outstanding effect that erasability improves further in addition to writability. In these cases, the diffuse reflectance of the projector light is high, the 60 ° gloss value is 40 or less, preferably 1 to 40, and no hot spot is generated, and the viewing angle is widened. 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, the projections are not sufficiently formed on the outermost surface of the film. When the 60 ° gloss value is measured, it is 41 or more, a hot spot is generated, and the viewing angle is narrow. In addition, when the average particle diameter 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 UV curable resin, the ink enters between the irregularities when writing with the whiteboard marker. It becomes impossible to remove.

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。   In the projective screen film of the present invention, the thermoplastic resin constituting the substrate (A) is not particularly limited, but polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and polyolefins such as polyethylene and polypropylene. Further, those obtained by coloring the resin in white are preferably used. Examples thereof include “Chrisper Series” manufactured by Toyobo Co., Ltd. and “Diafoil W400” manufactured by Mitsubishi Plastics, Inc. Moreover, it is preferable that the thickness of a base material (A) is 20-250 micrometers, and it is more preferable that it is 40-200 micrometers.

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。   Furthermore, 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 exhibits various excellent effects that the screen surface is hardly damaged. In contrast, the conventional thermosetting cross-linked resin can provide initial erasability, but its hardness is lower than that of the ultraviolet curable resin of the present invention, so the scratch resistance is insufficient, and when erasing is repeated with an eraser. The surface is damaged and the erasability is reduced. Examples of the ultraviolet curable resin used in the present invention include acrylic resins, epoxy resins, urethane resins, and resins containing these silicones, fluorine-modified oligomers or monomers, and photopolymerization initiators. Specific examples of these include, but are not limited to, “UVT clear series” manufactured by DIC Graphics Corporation, “Rioduras Series” manufactured by Toyo Ink Co., Ltd., “Art Resin Series” manufactured by Negami Kogyo Co., Ltd. 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 a resin such as polyethylene, polypropylene, and acrylic, and inorganic fine particles such as glass, silica, a titanium compound, a zirconium compound, and alumina. These specific examples are not particularly limited, but include “Mipelon Series” manufactured by Mitsui Chemicals, Inc. “Toughtic Series” manufactured by Toyobo Co., Ltd. “Art Pearl” manufactured by Negami Kogyo Co., Ltd., manufactured by Unitika Co., Ltd. “Unibeads series”, “Silicia series” manufactured by Fuji Silysia Chemical Co., 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。   Furthermore, in the present invention, by containing a fluorine-based or silicone-based compound in the ultraviolet curable resin, by improving the slipperiness of the film surface and reducing the affinity between the writing marker and the cured film (B) surface. The erasability can be improved. Examples of the fluorine-based compound include “Mega-Fuck Series” manufactured by DIC Corporation, and examples of the silicone-based compound include “BYK Series” manufactured by Big Chemie Japan Co., Ltd.

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 substrate (A), a liquid mixture obtained by mixing 1 to 150 parts by mass of fine particles with 100 parts by mass of an uncured resin liquid of an ultraviolet curable resin is used as a roll coater or a bar coater. There is a method of coating by using a known apparatus such as a gravure coater and curing by irradiating with ultraviolet rays. 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。   Moreover, in this invention, it is preferable to form an adhesive bond layer on the base material surface opposite to the surface in which the said cured film (B) was formed, and it is more preferable that an adhesive bond layer is formed with an adhesive. By forming such an adhesive layer, the screen film can be installed in various places such as walls and partitions, especially when a releasable adhesive is used as an adhesive, 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 the purpose of permanent adhesion or a removable pressure-sensitive adhesive for the purpose of temporary adhesion. For example, “Sanbinol series” manufactured by Seiden Chemical Co., Ltd. , “SK Daishin Series” manufactured by Soken Chemical Co., Ltd., “Olivein 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。   Furthermore, in the present invention, when a magnetic sheet is laminated through the adhesive layer, it can be easily installed / removed in various places such as a blackboard and 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. and “Anisotropic Magnet Sheet Series” manufactured by CI Kasei Co., Ltd.

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, a heat sealing agent made of a resin such as urethane or acrylic may be used as the adhesive, and those that exhibit heat sealing properties at a low temperature (for example, 150 ° C. or lower) are more preferable. The thickness of the adhesive layer is preferably about 1 to 20 μm. Specific examples of the adhesive are not particularly limited, and examples thereof include “Dick Seal Series” and “Dick Dry Series” manufactured by DIC Corporation, “Arrow Base Series” manufactured by Unitika Corporation, and the like.

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. In addition, this invention is not limited by description of an Example.

<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。
<Projection: 60 ° gloss on the screen surface>
It measured using the glossiness meter (Horiba Ltd. make, GLOSS CHECKER IG-320).

<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。
<Projectivity: Hot spot>
When a short focus projector (manufactured by Hitachi, Ltd., CP-A300N) projects an image on the screen surface, “○” indicates that there is no hot spot and the image can be viewed without any problem. Is “◯ △”, and “x” is the case where the hot spot is dazzling and it is difficult to see the image.

<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>
After writing about 5cm straight line with whiteboard marker (whiteboard marker uni known sensor black), let stand at room temperature to dry, then rub with whiteboard eraser (Aoi Chalkboard Mfg. Co., Ltd., School Soft Eraser) and write When the ink is erased, the surface is visually checked for stains. If there is no stain, “○” indicates that there is no stain, “○ △” indicates that there is a thin stain, and “△” indicates that there is a noticeable stain. In the case where dirt remains, “x” is given.

<実施例1〜2>
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(実施例1)、または15質量部(実施例2)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/m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。
<Examples 1-2>
2 parts by mass of a cross-linked acrylic resin (manufactured by Sekisui Plastics Co., Ltd., Techpolymer MBX-2H) having an average particle diameter of 2 μm per 100 parts by mass of an ultraviolet curable resin (Teikoku Inks, UVOS-90202 KR Clear) (Example 1) or 15 parts by mass (Example 2) The mixed liquid added was 1 to 10 g / g on the mirror surface side of 75 μm-thick white polyethylene terephthalate resin (Chrisper K2411 manufactured by Toyobo Co., Ltd.) as the base material (A). m 2 was applied and cured by irradiating with ultraviolet rays to form a cured film (B) to obtain a projective screen film. Table 1 shows the evaluation results of erasability and projectability.

<実施例3〜6>
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3)、または60質量部(実施例4)、100質量部(実施例5)、150質量部(実施例6)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 3 to 6>
30 parts by mass (Example 3) 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 ultraviolet curable resin similar to Example 1. Alternatively, the projection screen was produced under the same conditions as in Example 1 except that the mixed liquid added with 60 parts by mass (Example 4), 100 parts by mass (Example 5), and 150 parts by mass (Example 6) was used. A film was obtained. Table 1 shows the evaluation results of erasability and projectability.

<実施例7>
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 7>
A mixed liquid in which 15 parts by mass of a crosslinked acrylic resin having an average particle size of 12 μm (Techpolymer MB30X-10, manufactured by Sekisui Plastics Co., Ltd.) is added to 100 parts by mass of the ultraviolet curable resin similar to Example 1 is used. A projective screen film was obtained under the same conditions as in Example 1 except that. Table 1 shows the evaluation results of erasability and projectability.

<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 a mixed solution in which 15 parts by mass of silica fine particles (CIR Nanotech, SIRMIBK15WT% -H50) having an average particle diameter of 0.5 μm was added to 100 parts by mass of the same ultraviolet curable resin as in Example 1. The film was produced under the same conditions as in Example 1 to obtain a projective screen film. Table 2 shows the evaluation results of erasability and projectability.

<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 2-4>
15 parts by mass (Comparative Example 2) of crosslinked acrylic fine particles having an average particle diameter of 20 μm (manufactured by Sekisui Plastics Co., Ltd., Techpolymer MBX-20) with respect to 100 parts by mass of the ultraviolet curable resin as in Example 1. A projective screen film was obtained by producing under the same conditions as in Example 1 except that the mixed liquid added with 60 parts by mass (Comparative Example 3) and 100 parts by mass (Comparative Example 4) was used. Table 2 shows the evaluation results of erasability and projectability.

<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 liquid in which 0.5 part by mass of crosslinked acrylic fine particles (manufactured by Sekisui Plastics Co., Ltd., Techpolymer MBX-5) having an average particle diameter of 5 μm is added to 100 parts by mass of the ultraviolet curable resin similar to Example 1. The film was produced under the same conditions as in Example 1 except that a projection screen film was obtained. Table 2 shows the evaluation results of erasability and projectability.

<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>
A mixed liquid in which 200 parts by mass of crosslinked acrylic fine particles (Sekisui Chemicals Co., Ltd., Techpolymer MBX-5) having an average particle diameter of 5 μm was added to 100 parts by mass of the ultraviolet curable resin similar to Example 1 was used. A projective screen film was obtained under the same conditions as in Example 1 except that. Table 2 shows the evaluation results of erasability and projectability.

Figure 2018054809
Figure 2018054809

Figure 2018054809
Figure 2018054809

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1〜150質量部添加された硬化膜(B)が形成された実施例1〜7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 Tables 1 and 2, a cured film in which 1 to 150 parts by mass of fine particles having an average particle diameter of 2 to 12 μm are added to 100 parts by mass of the ultraviolet curable resin (A). The screen films of Examples 1 to 7 formed with B) have excellent erasability and projectability.
On the other hand, Comparative Examples 1 to 6 in which the average particle diameter or addition amount of the fine particles in the cured film (B) are out of the above range cannot achieve both the erasability and the 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 and erasing with the writing marker of the present invention, a clear projected image can be obtained, and marker ink can be written and erased satisfactorily. It can be applied to film that is also used 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。The cross-sectional schematic diagram showing an example of the screen film for projection of this 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1〜150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 comprising 1 to 150 parts by mass of fine particles having an average particle diameter of 2 to 12 μm per 100 parts by mass of the ultraviolet curable resin in a base material (A) composed of a thermoplastic resin. Projection screen film formed with 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10〜60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 10 to 60 parts by mass with respect to 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 projection screen film according to claim 1 or 2, wherein in the cured film (B), the fine particles have an average particle diameter of 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 base material surface 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。   6. The projection screen film according to claim 5, wherein the adhesive layer is formed of an 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 or 6, wherein a magnet sheet is laminated via the adhesive layer.













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