200900844 九、發明說明： 【發明所屬之技術領域】 本發明係關於將投射器投出 從前面對其晝像進行視覺 、f於背面時，能夠 【先前技術】 一 MM幕。 過去，作為穿透式螢幕，為獲 * ^ 用德扭上u 巧筏侍回冗度、高對比化，使 用偏振先片、菲涅耳透鏡片、雔 又凸面透鏡片等者已實用 rV 、二此等過去的穿透式榮幕由於使用偏振光片或透 ::故為高價。I，曾考慮將穿透式螢幕貼於櫥窗，然 後將此以投射器投影動態廣告之廣告方法，但由於過去之 I透式螢幕無透視性，從外面看不到裏面的商品，故有橋 ®失去其意義之問題。 口此，為解決上述之問題有種種提議被提出。 專利文獻1揭示：為改良背景視覺辨認性，將穿透式螢 幕構成為：使由透明之球狀微粒子'與此球狀微粒子折射 率不同之透明黏合劑構成的具有光擴散性之部分，與有透 視性之部分週期地或無規地混合存在。 專利文獻2揭示：為改良背景視覺辨認性，於穿透式螢 幕叹置W方散射性之光散射層，其為具有含有粒子直徑大 於光之波長的球狀電介體粒子，幾乎全部朝入射之光的前 進方向散射’而不於後方散射之性質。 專利文獻3揭示：作為背面投射型投影電視中使用之穿 透式勞幕，於玻璃基板之前面設置光反射防止層，於此坡 璃基板之背面設置由將擴散劑包含於樹脂中之樹脂薄膜所 128453.doc 200900844 構成之光擴散材層的穿透式螢幕。 專利文獻1 :特開2〇〇6]33636號公報 專利文獻2 :特開2〇〇1_242546號公報 專利文獻3 :特開2〇〇5-25〇m號公報 【發明内容】 發明所欲解決之問題 " 上述過去之穿透式螢幕獲得之映像，其對比度方 面並未充分滿足，欠缺鮮明度。 本發明之目的在於提供一種穿透式螢幕，其不會於螢幕 上映出來自投影器侧之映像，而是在能夠視覺辨認發幕背 景同時還能夠從投射器之相對侧於螢幕上映出對比度強烈 且鮮明的映像’能料對螢幕之映像與螢幕之背景進行視 覺辨認。 解決問題之技術手段 本發明者發現，由含有基材層與主光散射層之積層構造 體構成之穿透式螢幕，藉由使基材層及主光散射層各含有 特定濃度之光散射劑可解決上述問題，因而完成本發明。 即’本發明為以下所述者。 ⑴-種穿透式榮幕，係由積層體構成，該積層體具有 含有第1光散射劑之主光散射層（皮膜層）、形成於上述主光 散射層上之含有較上述第i光散射劑渡度為低濃度之第2光 散射劑的基材層’纟中’上述積層體之積層方向之光線透 過率為70%以上’對比度為_:1以上。另外，第i光散射 劑之濃度係以主光散射層之全質量為基準，第2光散射劑 128453.doc 200900844 之濃度係以基材層之全質量為基準。 (2) 如（1)之穿透式螢幕，其中上述主光散射層中之上述 第1光政射劑之濃度為1〇〜3〇〇〇 ppm，上述基材層中之上述 第2光散射劑之濃度為ojm j ppm。 (3) 如⑴或（2)之穿透式螢幕’纟中上述主光散射層係以 第1光透過性樹脂作為構成成分，上述基材層係以第2光透 過性樹脂作為構成成分。 (4) 如（3)之穿透式螢幕，其中上述第丨光透過性樹脂及/ 或上述第2光透過性樹脂為曱基丙烯酸樹脂。 (5) 如（1)〜(4)中任一項之穿透式螢幕，其中上述主光散 射層中之上述第1光散射劑之濃度（c])對於上述基材層中之 上述第2光散射劑之濃度（ο之比（CVC2)為2〇/ι〜2〇〇〇/ι。 (6) 如（1)〜（5)中任一項之穿透式螢幕，其中上述主光散 射層之厚度（T〗）相對於上述基材層之厚度（T2)之比（Τι/Τ2) 為1/300〜1/7 。 (7) 如（1)〜(6)中任一項之穿透式螢幕，其中上述主光散 射層係設為片狀，於此主光散射層主面之—面或雙面上形 成上述基材層。 【實施方式】 本發明之穿透式榮幕，不僅能夠映出對比度強烈鮮明的 映像，亦可獲得良好的背景視覺辨認性之效果。且，在某 材層添加光散射劑就提高晝像之亮度均—性方面可帶來車 1 好之效果。 以下參照圖式對較佳實施形態進行說明。另外，圖式說 128453.doc 200900844 明中同一元件賦予同一符號，省略重複之說明。且，為理 解谷易將圖式之一部分誇大描述，大小比率未必與說明一 致。 圖1為第1實施形態之穿透式螢幕的立體圖。圖丨所示之 第1實％形態之穿透式螢幕1〇具有主光散射層丨和形成於主 光散射層1上之基材層2。於第丨實施形態之穿透式螢幕 10，基材層2之主面（不與主光散射層i接觸之主面）相當於 才又〜映像之月面，主光散射層1之主面（不與基材層2接觸 之主面）相當於觀察其映像之前面。 主光散射層1含有第1光散射劑，基材層2含有第2光散射 劑。其中，基材層2中第2光散射劑之濃度（以基材層2全質 量為基準之第2光散射劑之質量）低於主光散射層丨中之第ι 光散射劑之濃度（以主光散射層丨全質量為基準之第丨光散 射劑之質量）。 圖2為第i實施形態之穿透式螢幕1〇之使用狀態的剖面 圖仗穿透式螢幕之背面（基材層2之主面），即自投射器 側投衫ί又射器3之映像，投影之映像到達穿透式螢幕1 〇之 珂面（主光散射層1之主面），即映像觀察者側。 圖3為第2實施形態之穿透式螢幕的立體圖。圖3所示第2 實施形態之穿透式螢幕丨丨，於主光散射層丨之主面的兩面 形成有基材層2。第2實施形態之穿透式螢幕丨丨中，一側之 基材層2之主面（不與主光散射層〗接觸之主面）相當於投影 映像之背面，另一側之基材層2之主面（不與主光散射層i 接觸之主面）相當於觀察其映像之前面。 128453.doc 200900844 &主光散射層1含有第1光散射齊卜基材層2含有第2光散射 :1其申’與第1實施形態之情形相同，基材層2中第2光 政=劑之濃度（以基材層2全f量為基準之第2光散射劑之 質里）低於主光散射層！中之第i光散射劑之濃度（以主光散 射層1全質量為基準之第丨光散射劑之質量）。 圖4為第2實施形態之穿透式螢幕】】之使用狀態的剖面 圖’從穿透式螢幕n之背面（―側之基材層2之主面），即自 投射器側投影投射器3之映像，投影之映像到達穿透式勞 幕11之前面(另一側之基材層2之主面)，即映像觀察者側。 、由於第1實施形態之穿透式螢幕10及第2實施形態之穿透 式螢幕11具有以上構成’故無需於螢幕上映出來自投影哭 :之映像，而是在能夠視覺辨認榮幕背景同時能夠從投： 器之相對側於螢幕上映出對比度強烈且鮮明的映像，亦能 同時對螢幕之映像與螢幕之背景進行視覺辨認。 此 車乂好主光散射層1係以第1光透過性樹脂作為構成成分， 基材層2係以第2光透過性樹脂作為構成成分。 ^ 丨，王光散 射層1較好含有光透過性樹脂及第丨光散射 巷柯層2卓交 好含有第2光透過性樹脂及第2光散射劑。另外，第丨“丑 射劑與第2光散射劑可相同亦可不同，第 “放 ^ 弟1先透過性樹脂與 第2光透過性樹脂可相同亦可不同。 、 可適用各 聚碳酸酯 聚酯樹脂 種 樹200900844 IX. OBJECTS OF THE INVENTION: 1. Field of the Invention The present invention relates to a MM screen which can be used to project a projector from the front and visualize it on the back side. In the past, as a transmissive screen, in order to obtain the redundancy and high contrast, the use of polarization first, Fresnel lens, 雔 and convex lens, etc. has been applied to rV, Secondly, the past penetrating glory is expensive due to the use of polarizers or transparent:: I, I have considered attaching a penetrating screen to the window, and then using this projector to project a dynamic advertising method. However, since the past I-through screen has no perspective, the inside is not visible from the outside, so there is a bridge. ® loses its meaning. In view of this, various proposals have been made to solve the above problems. Patent Document 1 discloses that, in order to improve background visibility, a transmissive screen is configured to have a light diffusing portion composed of a transparent spherical fine particle and a transparent adhesive having a refractive index different from that of the spherical fine particle. Partially or randomly mixed parts exist in perspective. Patent Document 2 discloses that, in order to improve background visibility, a W-scattering light scattering layer is slanted on a transmissive screen, which is a spherical dielectric particle having a particle diameter larger than a wavelength of light, almost all incident The forward direction of the light scatters 'the nature of the back scattering. Patent Document 3 discloses that a transmissive screen used in a rear projection type projection television is provided with a light reflection preventing layer on the front surface of the glass substrate, and a resin film containing the diffusing agent in the resin is disposed on the back surface of the glass substrate. 128453.doc 200900844 The penetrating screen of the light diffusing material layer. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. 2-242546. The problem " The images obtained from the above-mentioned past penetrating screens are not fully satisfied in terms of contrast, and lack of sharpness. It is an object of the present invention to provide a transmissive screen that does not reflect the image from the projector side on the screen, but is capable of visually recognizing the background of the screen while also providing a strong contrast on the screen from the opposite side of the projector. And the vivid image 'can visually recognize the image of the screen and the background of the screen. Means for Solving the Problems The present inventors have found that a transmissive screen composed of a laminated structure including a base material layer and a main light scattering layer has a specific concentration of light scattering agent by each of the base material layer and the main light scattering layer. The above problems can be solved, and thus the present invention has been completed. That is, the present invention is as described below. (1) A penetrating type glory screen comprising a laminated body having a main light scattering layer (film layer) containing a first light scattering agent, and a main light scattering layer formed on the main light scattering layer The base material layer of the second light-scattering agent having a low concentration of the second light-scattering agent has a light transmittance of 70% or more in the laminated direction of the laminate. The contrast ratio is _: 1 or more. Further, the concentration of the i-th light scattering agent is based on the total mass of the main light-scattering layer, and the concentration of the second light-scattering agent 128453.doc 200900844 is based on the total mass of the substrate layer. (2) The transmissive screen of (1), wherein the concentration of the first photo-active agent in the main light-scattering layer is 1 〇 to 3 〇〇〇 ppm, and the second light scattering in the substrate layer The concentration of the agent is ojm j ppm. (3) In the transmissive screen of (1) or (2), the main light scattering layer is made of a first light transmissive resin as a constituent component, and the base material layer is made of a second light transmissive resin. (4) The transmissive screen of (3), wherein the second light transmissive resin and/or the second light transmissive resin is a mercapto acrylic resin. (5) The transmissive screen according to any one of (1) to (4), wherein a concentration (c) of the first light scattering agent in the main light scattering layer is the same as the above in the substrate layer The concentration of the light-scattering agent (the ratio of ο (CVC2) is 2 〇 / ι 〜 2 〇〇〇 / ι. (6) The transmissive screen of any one of (1) to (5), wherein the above-mentioned main The ratio of the thickness (T) of the light-scattering layer to the thickness (T2) of the base material layer (Τι/Τ2) is 1/300 to 1/7. (7) As in any of (1) to (6) The transmissive screen of the present invention, wherein the main light scattering layer is formed into a sheet shape, and the base material layer is formed on the surface or both surfaces of the main surface of the main light scattering layer. The screen will not only reflect the strong contrast of the image, but also obtain a good background visual recognition effect. Moreover, adding a light scattering agent to a certain layer can improve the brightness of the image. The preferred embodiment will be described below with reference to the drawings. In the drawings, the same reference numerals are given to the same elements in the drawings, and the description thereof will be omitted. In order to understand the meaning of one of the drawings, the size ratio is not necessarily the same as the description. Fig. 1 is a perspective view of the penetrating screen of the first embodiment. The first real % form of the penetrating screen shown in Fig. 1〇 has a main light scattering layer 丨 and a substrate layer 2 formed on the main light scattering layer 1. In the transmissive screen 10 of the second embodiment, the main surface of the substrate layer 2 (without the main light scattering layer i) The main surface of the contact is equivalent to the moon surface of the image, and the main surface of the main light scattering layer 1 (the main surface not in contact with the substrate layer 2) corresponds to the front surface of the image. The main light scattering layer 1 contains the A light-scattering agent, the base layer 2 contains a second light-scattering agent, wherein the concentration of the second light-scattering agent in the base material layer 2 (the mass of the second light-scattering agent based on the total mass of the base material layer 2) is low. The concentration of the ι light scattering agent in the main light scattering layer ( (the mass of the second light scattering agent based on the total mass of the main light scattering layer). Fig. 2 is a transmission screen of the i-th embodiment. A cross-sectional view of the state of use 仗 the back side of the transmissive screen (the main side of the substrate layer 2), that is, the shirt from the side of the projector The image of the projector 3 is projected, and the projected image reaches the top surface of the transmissive screen 1 (the main surface of the main light scattering layer 1), that is, the image observer side. Fig. 3 is a transmission screen of the second embodiment. In the transmissive screen of the second embodiment shown in Fig. 3, the base layer 2 is formed on both surfaces of the main surface of the main light scattering layer 。. In the transmissive screen of the second embodiment, one The main surface of the substrate layer 2 on the side (the main surface not in contact with the main light scattering layer) corresponds to the back surface of the projection image, and the main surface of the substrate layer 2 on the other side (not in contact with the main light scattering layer i) The main surface is equivalent to the front surface of the image. 128453.doc 200900844 & The main light scattering layer 1 includes the first light-scattering substrate layer 2 including the second light scattering: 1 is the same as in the first embodiment. In the base material layer 2, the concentration of the second optical agent (the mass of the second light-scattering agent based on the total amount of the base material layer 2) is lower than that of the main light-scattering layer! The concentration of the i-th light scattering agent (the mass of the second light-scattering agent based on the total mass of the main light-scattering layer 1). Fig. 4 is a cross-sectional view showing the use state of the transmissive screen of the second embodiment from the back surface of the transmissive screen n (the main surface of the substrate layer 2 on the side), that is, the projection projector from the projector side The image of 3, the image of the projection reaches the front surface of the penetrating screen 11 (the main surface of the substrate layer 2 on the other side), that is, the image viewer side. Since the transmissive screen 10 of the first embodiment and the transmissive screen 11 of the second embodiment have the above configuration, it is not necessary to display the image from the projection crying on the screen, but the visual background can be visually recognized. The contrasting and sharp image can be reflected on the screen from the opposite side of the projector: it can also visually recognize the image of the screen and the background of the screen. In the rutting, the main light-scattering layer 1 has a first light-transmitting resin as a constituent component, and the base material layer 2 has a second light-transmitting resin as a constituent component. ^ 王, Wang Guangsan The shot layer 1 preferably contains a light transmissive resin and a second light scattering lane. The second layer contains a second light transmissive resin and a second light scattering agent. Further, the "an illuminant and the second light-scattering agent may be the same or different, and the first "transparent resin" may be the same as or different from the second light-transmitting resin. , applicable to each polycarbonate polyester resin species tree
作為第1光透過性樹脂及第2光透過性樹脂， 熱可塑性樹脂，但較好為甲基丙烯酸樹腊、 脂、苯乙烯系樹脂、環狀稀烴系樹脂、非晶性 光學材料’更好為曱基丙稀酸樹月旨。 128453.doc 200900844 此處之甲基丙烯酸樹脂意指藉由使甲基丙烯酸曱g旨或甲 基丙稀酸乙醋70重量％以上和與此等具有共聚合性的單體 共聚合所得者。The first light transmissive resin and the second light transmissive resin are thermoplastic resins, but preferably methacrylic wax, fat, styrene resin, cyclic dilute resin, or amorphous optical material. Good for the sulphur-based acrylic tree. 128453.doc 200900844 The methacrylic resin herein means a copolymer obtained by copolymerizing methacrylic acid methacrylate or methyl methacrylate 70% by weight or more with such a copolymerizable monomer.
作為與甲基丙烯酸甲酯或甲基丙烯酸乙酯有共聚合性之 單體，可使用：甲基丙烯酸丁酯、甲基丙烯酸乙酯、甲基 丙烯酸甲酯、甲基丙烯酸丙酯、甲基丙烯酸環己酯、曱^ 丙烯酸苯酯、甲基丙烯酸_2_乙基己酯等甲基丙烯酸酯類； 丙烯酸甲酯、丙烯酸乙酯、丙烯酸丁冑、丙烯酸環己酯、 丙烯酸苯酯、丙烯酸_2_乙基己酯等丙烯酸酯類；曱基丙烯 酸、丙烯酸等不飽和酸類等。 另外，作為第1光透過性樹脂及第2光透過性樹脂，亦可 使用耐熱性甲基丙稀酸樹脂、低吸濕性甲基丙稀酸樹脂、 耐：擊性甲基丙烯酸樹脂等。耐衝擊性甲基丙婦酸樹脂為 可提向耐衝擊性之丙嫌酿姑+ ,. 芊丨心内辉鲛树月曰，例如，於甲基丙烯酸樹脂 中掺合橡膠彈性體者。作為此橡膠彈性體之—例，可舉例 為’藉由於丙稀酸系聚合物芯材料之周圍交替生成彈性層 及非彈性層之多階段逐次聚合法所製造之多段聚合物。將 此橡膠彈性體掺合於f基丙烯酸樹脂，可獲得耐衝擊性甲 基丙婦酸樹脂。 且 1之用八灵碳酸醋作為笛丨止 士 下馮弟1先透過性樹脂及第2光透過性 树脂時，作為聚碳酸酯較好 f使用由雙酚A為代表之二價 盼系化β物所衍生之甲人^^ …之t合物。聚碳酸S旨樹脂之製造方法無 特別限定，可以庳闲止女4 虱法、酯交換法或固相聚合法等製 造万法。 128453.doc 200900844 乍為第A透過性樹脂及第2光透過性樹脂使用之環狀 系樹脂為降冰片烯戍環岳望μ 飞衣己一烯專λΚ合物鏈中含有環狀烯烴 月架之聚合物或包含士卜望m 3此4之共聚物，屬於非晶性熱可塑性 樹脂。其製造方法鉦牡 ，、、、特別限疋例如，作為以降冰片烯為 主之環狀稀烴樹脂之叫列’可使用乙稀.降冰片稀共聚人 物之TiC_株式會社製之「T〇pas」（商品名），作為環戊二As a monomer copolymerizable with methyl methacrylate or ethyl methacrylate, butyl methacrylate, ethyl methacrylate, methyl methacrylate, propyl methacrylate, methyl group can be used. Methyl acrylate such as cyclohexyl acrylate, phenyl acrylate, -2-ethylhexyl methacrylate; methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, phenyl acrylate, acrylic acid Acrylates such as _2_ethylhexyl ester; unsaturated acids such as mercaptoacrylic acid and acrylic acid. Further, as the first light transmissive resin and the second light transmissive resin, a heat resistant methacrylic acid resin, a low moisture absorbing methacrylic acid resin, a damaging methacrylic resin or the like can be used. The impact-resistant methacrylic acid resin is a susceptibility to the impact resistance of the cockroach, and the eucalyptus eucalyptus, for example, a rubber elastomer blended with a methacrylic resin. As the rubber elastomer, for example, a multistage polymer produced by a multistage sequential polymerization method in which an elastic layer and an inelastic layer are alternately formed around the acrylic polymer core material can be exemplified. The rubber elastomer is blended with an f-based acrylic resin to obtain an impact-resistant methyl propylene glycol resin. And the use of Ba Ling carbonated vinegar as the flute 下 下 under Feng Di 1 first transparent resin and the second light transmissive resin, as a polycarbonate better f using bivalent A represented by the bivalent a compound derived from the beta compound. The method for producing the polycarbonate S resin is not particularly limited, and it is possible to manufacture a method such as a female method, a transesterification method or a solid phase polymerization method. 128453.doc 200900844 The ring-shaped resin used for the A-transmissive resin and the second light-transmitting resin is a norbornene ring, and the ring-shaped olefin is contained in a chain of olefins. The polymer or the copolymer comprising spectroscopy m 3 is an amorphous thermoplastic resin. The manufacturing method is 钲 , 、 、 特别 作为 作为 作为 作为 作为 Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Ti Pas" (trade name), as a cyclopentane
烯開環聚合物之—％ ’可使用曰本芝諾株式會社製之 「Zeonex」（商品名）等。 /作為第1光透過性樹脂及第2光透過性樹脂使用之苯乙稀 系樹脂為以苯乙烯為必須成分之均聚物、共聚物或由該等 聚合物與其他樹脂所得之聚合物掺合物等。本發明中，特 別好使用聚苯乙烯、丙烯腈及苯乙烯之共聚物樹脂的 ABS樹脂、甲基丙烯酸酿與苯乙稀之共聚物樹脂的樹脂 (以下有將甲基丙烯酸醋與苯乙烯之共聚物記為「MS」的 情形）。#者，亦較好使用苯乙烯系樹脂相中分佈有橡膠 之透明強化聚苯乙稀。#乙烯系樹脂之製造方法無特別限 制。 作為第1光透過性樹脂及第2光透過性樹脂使用之非晶性 聚S曰可使用聚酯之非晶體樹脂，該聚酯非晶體樹脂係乙 一醇、丙二醇、丨，‘丁二醇、新戊二醇、六亞甲基二醇等 脂肪族二醇、環己烷二甲醇等脂環族二醇、雙酚、丨，3_雙 (2-羥基乙氧基）苯、匕‘雙（羥基乙氧基）苯等芳香族二羥基 化δ物、或者選擇2種以上該等化合物之二經基化合物單 位，與對笨二甲酸、間苯二甲酸、2,6_萘二甲酸等芳香族 128453.doc 11 200900844 二羧酸、乙二酸、己二酸、癸二酸、琥珀酸、十一烷二叛 酸等脂肪族二羧酸、六氫對苯二甲酸酸等脂環族二羧酸、 或者選擇2種以上該等化合物之二元酸單位所形成。 非晶性聚酯之製造方法無特別限定。作為容易獲得之非 晶性聚酯的銷售品牌，可舉例有BUTOMANKODAKKU社 製品之KODARPTEC或PCTA等。"Zeonex" (trade name) manufactured by Sakamoto Zeno Co., Ltd. can be used as the %% of the ring-opening polymer. / The styrene-based resin used as the first light-transmitting resin and the second light-transmitting resin is a homopolymer or a copolymer containing styrene as an essential component or a polymer blended with the polymer and other resins. Compounds, etc. In the present invention, an ABS resin of a copolymer resin of polystyrene, acrylonitrile and styrene, a resin of a copolymer resin of methacrylic acid and styrene is particularly preferably used (hereinafter, methacrylic acid and styrene are used). The case where the copolymer is referred to as "MS"). #者, It is also preferred to use a transparent reinforced polystyrene in which a rubber is distributed in a styrene resin phase. The method for producing the ethylene resin is not particularly limited. As the amorphous polysulfon used as the first light transmissive resin and the second light transmissive resin, a polyester amorphous resin which is ethyl alcohol, propylene glycol, hydrazine, 'butanediol, or the like, may be used. An aliphatic diol such as neopentyl glycol or hexamethylene glycol, an alicyclic diol such as cyclohexane dimethanol, bisphenol, anthracene, 3_bis(2-hydroxyethoxy)benzene, orthoquinone An aromatic dihydroxylated δ substance such as (hydroxyethoxy)benzene or a di-based compound unit of two or more of these compounds, and a p-dicarboxylic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, or the like Aromatic 128453.doc 11 200900844 Aliphatic dicarboxylic acid such as dicarboxylic acid, oxalic acid, adipic acid, sebacic acid, succinic acid, undecanedioic acid, etc., alicyclic acid such as hexahydroterephthalic acid A dicarboxylic acid or a dibasic acid unit in which two or more of these compounds are selected. The method for producing the amorphous polyester is not particularly limited. As a brand of the non-crystalline polyester which is easily available, for example, KODARPTEC or PCTA of BUTOMANKODAKKU products can be exemplified.
如上所述，主光散射層1較好含有第1光散射劑及第】光 透過性樹脂，基材層2較好含有第2光散射劑及第2光透過 性樹脂，但根據需要亦可含有除主光散射層丨及基材層2以 外之添加成分。 添加成分可舉例為軟質聚合物，作為軟質聚合物，可使 用例如，由α-烯烴構成之烯系軟質聚合物、由異丁烯構成 之異丁烯系軟質聚合物、由丁二烯、異戊二烯等共軛二稀 構成之二烯系軟質聚合物、由降冰片#、環戊稀等環狀烯 烴構成之環狀烯烴系軟質聚合物、有機聚矽氧烷系軟質聚 合物、由α，β-不飽和酸與其料物構成之軟質聚合物、 由不飽和醇及胺或其醯基街生物或祕構成之軟質聚合 物、環氧化合物之聚合物、氟系橡膠等。 作為添加成分，除上述之外 明性情形下亦可使用可塑劑、 材、填料等。 ，在不損害穿透式螢幕之透 抗氧化劑、抗靜電劑、著色 。队剂知丨j汉弟2光散射削心柯料，可 舉例有碳酸約、氧魅、二氧化鈦、二氧切、玻璃 ’’’、機微粒+丨乙烯父聯珠、Ms交聯珠、矽氧烷系交聯 128453.doc 200900844 珠等有機微粒子。且，由甲基丙稀酸系樹脂、聚碳酸醋系 樹脂、MS樹脂、環狀烯烴樹脂等透明性高的樹脂材料構 成之中空交聯微粒子及由破璃構成之中空微粒子等亦適合 作為光散射劑。料，較好光散射劑係分散於構成主光散 射層1及基材層2之樹脂中。As described above, the main light-scattering layer 1 preferably contains the first light-scattering agent and the first light-transmitting resin, and the base material layer 2 preferably contains the second light-scattering agent and the second light-transmitting resin. The additive component other than the main light scattering layer 基材 and the substrate layer 2 is contained. The additive component may, for example, be a soft polymer, and as the soft polymer, for example, an ethylenic soft polymer composed of an α-olefin, an isobutylene soft polymer composed of isobutylene, or a butadiene or isoprene may be used. a diene soft polymer composed of a conjugated dilute, a cyclic olefin soft polymer composed of a cyclic olefin such as norborne # and cyclopentene, or an organic polyoxyalkylene soft polymer, which is composed of α,β- A soft polymer composed of an unsaturated acid and a material thereof, a soft polymer composed of an unsaturated alcohol and an amine or a sulfhydryl group, or a polymer of an epoxy compound, or a fluorine-based rubber. As the additive component, a plasticizer, a material, a filler, or the like can be used in addition to the above. It does not damage the anti-oxidant, antistatic agent, and coloring of the transmissive screen. Team agent knows j Handi 2 light scattering and cutting heart material, which can be exemplified by carbonic acid, oxygen, titanium dioxide, dioxo, glass ''', machine particles + 丨 vinyl parent conjugate, Ms cross-linked beads, 矽Oxyalkane cross-linking 128453.doc 200900844 Organic microparticles such as beads. Further, hollow crosslinked fine particles composed of a highly transparent resin material such as a methyl acrylate resin, a polycarbonate resin, an MS resin, or a cyclic olefin resin, and hollow fine particles composed of a glass are also suitable as light. Scattering agent. Preferably, the light scattering agent is dispersed in the resin constituting the main light-scattering layer 1 and the substrate layer 2.
作為使晝像成像之重要的主光散射層用之光散射劑，與 二氧化鈦等之白色系微粒子比較’透明系微粒子由於更能 夠提高投影晝像全體的色再現性故較好。透㈣微粒子可 舉例為氧化銘、二氧化石夕、玻璃珠等無機微粒子、苯乙稀 交聯珠、ms交聯珠、石m系交聯珠等有機微粒子。 又，第1光散射劑及第2光散射劑之形狀無特別限定，例 如可使用正球狀、球狀、立方狀、六方晶狀、不定形狀等 光散射劑。再者，光散射劑之粒徑較好在平均粒徑〇.02 μπι〜1 0 μιη之範圍，更好為〇 1 μιη〜2 μΓη之範圍。 如上所述，基材層2中之第2光散射劑濃度低於主光散射 層1中之第1光散射劑濃度。基材層2中之第2光散射劑濃度 之最低值為0，但由於可提高晝像之亮度均一性，故基材 層2中之第2光散射劑濃度較好大於〇。 光散射劑之濃度可以主光散射層1全質量作為基準之第j 光散射劑之重量分率（ppm)或以基材層2全質量作為基準之 第2光散射劑之重量分率（ppm)表示。 主光散射層1中之第1光散射劑濃度較好為1〇〜3〇〇〇 ppm’更好為1〇〇〜2500 ppm，最好為5〇〇〜2〇〇〇 ppm。另一 方面’基材層2中之弟2光散射劑濃度較好為〇, 1〜4.5沖爪， 128453.doc -13· 200900844 更好為〇.3〜4 PPm，最好為〇·5〜3 ppm。 主光散射層1中之第1光散射劑濃度（C,)相對於基材層2 中之第2光散射劑濃度（c2)之比（Ci/C2)較好為則〜 2_，更好W1()_。如此，不僅於主光散射層 中添加光散射劑，亦於基材層中添加光散射劑在提高畫像 之亮度均一性方面可發揮良好效果。 且’主光散射層1與基材層2較好有特定之厚度比。具體 為，主光散射層！之厚度（Tl)相對於基材層2之厚度（丁 2')之 比（IVT2)較好為1/300〜1/7，更好為丨/2，又更好為 1/100〜1/25。 再者，主光散射層丨之厚度隨著第丨光散射劑之種類而 異，但較佳犯圍為20 μηι〜500 μηι。主光散射層丨之厚度為 20 μηι以上日卞成像性能優異，5〇〇 以下時光線透過率 高’背景視覺辨認性亦可提高。 主光散射層1及基材層2係分別藉由將構成主光散射層夏 之成分（較好為含有第1光散射劑及第1光透過樹脂，亦可 含有其它添加成分）、構成基材層2之成分（較好為含有第2 光散射劑及第2光透過樹脂，亦可含有其它添加成分）形成 為薄片狀而獲得。作為此熱可塑性樹脂薄片，可使用藉由 擠壓成形製造之擠壓薄片、藉由澆鑄法製造之澆鑄薄片之 任一種。 本發明之穿透式螢幕，於具有主光散射層丨與基材層2之 積層體之積層方向的光線透過率為70%以上，對比度為 600:1以上。 128453.doc -14· 200900844 此處，光線透過率意指藉由JIS K7361測定之全光線透 過率，光線透過率較好為70%以上，更好為8〇%以上。藉 由光線透過率成為70%以上，不會於螢幕上映出來自投影 器側之映像，而在可視覺辨認螢幕背景之同時還能夠從投 射器之相對側於螢幕上映出對比度強烈且鮮明的映像。 對比度係藉由從穿透式螢幕背面以投射器使白色晝像及 黑色晝像成像’用亮度計從前面測定各亮度，測定亮度The light-scattering agent for the main light-scattering layer, which is important for image formation, is more preferable than the white-based fine particles such as titanium dioxide. The transparent fine particles are more likely to improve the color reproducibility of the entire projected image. The (four) microparticles can be exemplified by organic fine particles such as oxidized sulphur, sulphur dioxide, glass beads, styrene-crosslinked beads, ms crosslinked beads, and stone m-linked beads. Further, the shape of the first light-scattering agent and the second light-scattering agent is not particularly limited, and for example, a light-scattering agent such as a spherical shape, a spherical shape, a cubic shape, a hexagonal crystal shape, or an indefinite shape can be used. Further, the particle diameter of the light-scattering agent is preferably in the range of the average particle diameter 〇.02 μπι to 10 μιη, more preferably in the range of 〇 1 μιη to 2 μΓη. As described above, the concentration of the second light scattering agent in the base material layer 2 is lower than the concentration of the first light scattering agent in the main light scattering layer 1. The lowest value of the second light-scattering agent concentration in the base material layer 2 is 0. However, since the brightness uniformity of the image can be improved, the concentration of the second light-scattering agent in the base material layer 2 is preferably larger than 〇. The concentration of the light-scattering agent may be a weight fraction (ppm) of the j-th light scattering agent based on the total mass of the main light-scattering layer 1 or a weight fraction of the second light-scattering agent based on the total mass of the substrate layer 2 (ppm) ) said. The concentration of the first light scattering agent in the main light scattering layer 1 is preferably from 1 〇 to 3 〇〇〇 ppm', more preferably from 1 〇〇 to 2,500 ppm, and most preferably from 5 〇〇 to 2 〇〇〇 ppm. On the other hand, the concentration of the light scattering agent in the substrate layer 2 is preferably 〇, 1 to 4.5, and 128453.doc -13· 200900844 is preferably 〇.3~4 PPm, preferably 〇·5 ~3 ppm. The ratio (Ci/C2) of the first light-scattering agent concentration (C,) in the main light-scattering layer 1 to the second light-scattering agent concentration (c2) in the base material layer 2 is preferably 〜2_, more preferably W1()_. Thus, not only the light-scattering agent is added to the main light-scattering layer, but also the light-scattering agent is added to the base material layer to exhibit a good effect in improving the brightness uniformity of the image. Further, the main light scattering layer 1 and the substrate layer 2 preferably have a specific thickness ratio. Specifically, the main light scattering layer! The ratio (IVT2) of the thickness (Tl) to the thickness (D2') of the substrate layer 2 is preferably from 1/300 to 1/7, more preferably 丨/2, and even more preferably from 1/100 to 1 /25. Further, the thickness of the main light scattering layer 随着 varies depending on the type of the second light scattering agent, but it is preferably 20 μηι to 500 μηι. The thickness of the main light scattering layer is 20 μηι or more, and the image forming performance is excellent. When the light transmittance is less than 5 ’, the background visibility is also improved. The main light-scattering layer 1 and the base material layer 2 are composed of a component constituting the main light-scattering layer in summer (preferably containing the first light-scattering agent and the first light-transmitting resin, and may also contain other additive components). The component of the material layer 2 (preferably containing the second light-scattering agent and the second light-transmitting resin, and may contain other additive components) is obtained in the form of a sheet. As the thermoplastic resin sheet, any of extruded sheets produced by extrusion molding and cast sheets produced by a casting method can be used. In the transmissive screen of the present invention, the light transmittance in the direction of lamination of the laminate having the main light-scattering layer 丨 and the substrate layer 2 is 70% or more, and the contrast ratio is 600:1 or more. 128453.doc -14· 200900844 Here, the light transmittance means the total light transmittance measured by JIS K7361, and the light transmittance is preferably 70% or more, more preferably 8% by weight or more. By using a light transmittance of 70% or more, the image from the projector side is not reflected on the screen, and the contrast can be visually recognized while the contrast is strong and sharp on the screen from the opposite side of the projector. . Contrast is measured by imaging the white and black images from the back of the transmissive screen with a projector.
max.及亮度min•所得之值。對比度可表示為亮度:亮 度min. ’對比度比亦可以亮度邮乂"亮度—·表示。對比度 為，丨以上時，思私對比度比（亮度max./亮度min.)為600 以上。對比度為600:1以上時，晝像之鮮明度充分，作為 问穿透式螢幕之性能變高。匕度較好為帽:^以上，更 好為7 0 0:1以上。 本發明之穿透式螢幕，不限於上述第1實施形態之穿透 :式螢幕H)及第2實施形態之穿透式螢幕"之形態，而可進 丁各種id例如’只要保有上述光線透過率及對比度， 於穿=式勞幕10或11之主光散射層1與基材層2之間亦可設 # /、 θ此等層例如有提高主光散射層1與基材層2之接 者性之偶合劑層。兑，--- ^ ^ 亦可於穿透式螢幕之最外表面設置 抗靜電劑層或表面保護層。 接著，對穿透式螢幕之製造方法進行敍述。 、式勞幕之基材層及主光散射層，如上所述，可藉由 於第1光透過性樹脂或第 過性樹 =以過性樹脂（以下通稱「光透 刀政弟1光散射劑或第2光散射劑（以下通 128453.doc -15- 200900844 稱「光散射劑」），將所得光透過性樹脂組成物藉由擠壓 法=铸法形成為薄片狀而獲得。此光透過性樹脂組成物 =製造方法，若於光透過性樹脂中使光散射劑微粒子均勻 分散即可而無特別限定，更佳方法如後述。 、製，成為穿透式螢幕之基材層及主光散射層之含有光透 過性樹脂及光散射劑之微粒子的光透過性樹脂組合物時， 作為使光散射劑微粒子於光透過性樹脂中均勻分散之方 法，例如可以使用以下（1)或（2)之方法。 ⑴利用擠壓機將成為基材層及主光散射層之透明熱可 塑性樹脂與光散射劑之微粒子熔融混煉之方法： 於此情形’較好湘超聲波發生裝置使光散射劑之微粒 子分散於有機液體中，作成光散射劑分散液。所作成之光 散射劑分散液與光透過性樹脂混合’利用擠壓機熔融混煉 此此σ物此時’所使用之有機液體只要不會引起光散射 劑之微粒子的溶解、膨脹等，且可均勾分散者則無任何限 定。又’根據分散狀態可以將數種有機液體以任意比例混 合使用。 另外，此處所謂之有機液體，除一般有機)夜體之外，亦 包含構成光透過性樹脂之聚合性單體，只要是難以引起光 散㈣!之微粒子溶解、膨脹等，且可均—分散者則無任何 限定。且’根據光散射劑微粒子的分散狀態可以將數種有 機液體以任意比例混合使用。 作為-般有機液體’可使用丙嗣、甲基乙基酮等_類； 二甲苯、甲苯等芳香族類；甲醇、乙醇等醇類。且，作為 128453.doc 200900844 聚合性單體，於例如光透過性樹脂為甲基旨1 形’可使用甲基丙烯酸甲醋、甲基丙烯酸乙賴、甲基丙烯 酸㈣、甲基丙烯酸丁酉旨、甲基丙稀酸環己酉旨、甲基丙稀 酸本基、甲基丙烯酸2_乙基己醋等甲基丙稀酸酿類；丙歸 酸甲酿、丙稀酸乙酷、丙稀酸丁酿、丙稀酸環己酿、丙稀 酸苯基、丙稀酸2_乙基己醋等丙稀酸酿類；甲基丙稀酸、 丙烯酸等不飽和酸類等。 Γ 光散射劑微粒子與有機液體的混合比可以考慮光散射劑 齡子的分散性任意決定，但較好以相對於有機液體⑽ 重置份’光散射劑微粒子為〇 〇〇1〜8〇重量份之範圍混合。 又’由光散射劑微粒子與有機液體構成之光散射劑分今 液與光透過性樹脂之混合比可考纽合擠壓步驟中之㈣ 性作任意決定’但較好以相對於㈣過性樹脂⑽重量 份，分散液在0.001〜10重量份之範圍混合。 —光散射劑分散液與光透過性樹脂混合之方法無特別限 疋’例如，可以藉由亨舍爾擾掉機混合、藉由超效氣浮哭 混合、藉由滾筒混合的混合方法進行混合。 / 又，用於上述混合物之溶融混煉之擠壓機亦未必 特別者’只要至通常的單軸或雙軸之擠壓機等即可。苴 :去除分散時所使用之有機液體之揮發成分的觀點觀 、乂好為於排氣口（< v卜口）較好為300 Torr以下之 =揮發的壓出機。並且’擠壓模嘴較好使用可控制各層 尽度之多層擠壓模嘴。 曰 再者攸防止光散射劑微粒子二次凝集的觀點觀之，以 128453.doc -17- 200900844 使用雙軸擠壓機製造較好。擠壓機之溫度可根據所使用之 光透過性樹脂之種類任意設定。例如，使用甲基丙烯酸樹 脂作為光透過性樹脂時係在1 8〇艺〜26(rc左右。 (2)藉由澆鑄法聚合獲得螢幕之方法·· 此情形下，可利用較好使用超聲波發生裝置使光散射劑 微粒子分散於光透過性樹脂之原料單體或可與此單體共聚 σ之單體中之方法。此情形，較好使光散射劑微粒子預先 分散至原材料單體之一部份中，其後，混合於部分聚合之 聚合物溶液等之t而使用。光散射劑微粒子與分散光散射 劑微粒子之原料單體的量比可以根據分散性、準傷時之黏 度、操縱性等作任意決定。 又’澆鑄法之聚合溫度、聚合時間、聚合開始劑量等之 聚口條件或薄片（洗鑄板）之形成方法亦無特別限定。薄片 形：之方法可使用例如玻璃單元澆鑄法、連續澆鑄法等。 错⑴或（2)之製造方法所得之穿透式營幕之表面由於光 散射劑濃度低而有鏡面光澤， ^ ψ j獲侍尚對比度而較好。 另外，使微粒子分勒所· # | 斤使用之赵聲波發生裝置無特別限 定，可以使用市售之招辣,、*、上、+ ,， 耳波β洗機或超聲波攪拌器等。 如，一般使用超聲波頻率Α ? ㈣羊為28 kHZ〜1G() kHz的超聲波清洗 機。以超聲波發生裝置之昭 h& …、射時間可根據光散射劑微粒子 的分散狀態任意進行設定，彳 叹疋但—般較好照射1分鐘〜60分鐘 左右。 實施例 明之實施形態進行具體說明，但 以下根據實施例對本發 128453.doc 200900844 本發明並不侷限於此等實施例。另外，各實施例所得結果 如表1所示。 [實施例1 ] 將作為光散射劑之平均粒徑為〇. 5 μηι的氧化鋁2.5 ppm掺 混入德魯佩特LP-1(甲基丙烯酸樹脂：旭化成化學株式會 社製）中，準備基材層用樹脂。然後於德魯佩特1中掺 此入上述氧化鋁丨〇〇〇卯爪準備主光散射層用樹脂。將基材 層用樹脂裝入螺桿直徑為12〇 mm(j)、L/D(擠壓長度/擠壓直 徑）=32的擠壓機，再將主光散射層用樹脂裝入螺桿直徑為 40 ιηιηφ、L/D=32的擠壓機，使用此等擠壓機壓出成形為 厚8 mm、寬i120 mm、長23〇〇 mm之積層薄片獲得螢 幕此螢幕之皮膜層厚度為200 μιη，光線透過率為9〇。/0。 另外，此處作為光散射劑平均粒徑之測定法，係藉由超 聲波使光散射劑微粒子分散至有機液體中，再用顯微電子 法測定所得分散液，將5〇%累積粒徑作為平均粒直徑。 立起積層薄片作為螢幕，從背面利用投射器使「白色」 旦像及黑色」畫像於薄片上成像，從前面用亮度計測定 各個亮度，以亮度max./亮度min.作為對比度。 又作為白色」及「黑色」之發生裝置係使用 rNTSC Test Signal Generator 435 j (Leader Electronics Corporation)’ 藉由「Inte出gem pr〇ject〇r ip_55」（日本 航空電子設備（株）製）投影於螢幕。亮度計使用bm_7(株式 會社拓普康製）。 其、..σ果，對比度（党度max /亮度min )為91〇」，顯示過去 128453.doc 200900844 所沒有的高對比度。 [實施例2] 除了基材層之光散射劑量成為0.5 PPm以外，其他與實 施例1相同，擠壓多層薄片， 獲付先線透過率為9 1 °/〇之螢 幕。此螢幕之對比度為_:1，與實施例1同樣顯示 度。 [實施例3] 除了基材層之光散射劑量成為45 ppm以外，其他盘實 施例1相$ ’擠壓多m，獲得光線透過率為86%之榮 幕:此螢幕之對比度為620:1，顯示比實施⑴低但仍比既 有穿透式螢幕（比較例2)高的對比度。 [實施例4 ] 除了將基材層之光散射劑變更為平均粒徑叫的二氧 化鈦以外，其他與實施例2相同，擠壓多層^，獲得光 線透過率為89%之榮幕。此螢幕之對比度為78〇:1，與實施 例1同樣顯示高對比度。 [實施例5 ] 除了氧化鋁平均粒徑成為丨μπι以外，其他與實施例1相 同，擠壓多層薄片，獲得光線透過率為88%之螢幕。此螢 幕之對比度為820: ：!’與實施例i同樣顯示高對比度。 [實施例6] 除了基材層之光散射劑濃度成為〇. i ppm以外，其他與 實施例4相同，擠壓多層薄片，獲得光線透過率為91%之 榮幕。此螢幕之對比度為650:1 ’顯示高對比度。 128453.doc -20- 200900844 [比較例1 ] 除了基材層之光散射劑"S成為5 ppm以外，其他與實施 例1相同，擠壓多層薄片，獲得光線透過率為84〇/。之螢 幕。此螢幕之對比度為570:1，為比實施例差者。 [比較例2] 除了基材層中沒有放入光散射劑以外，其他與實施例！ 相同，擠壓多層薄片，獲得光線透過率為9 1 °/〇之螢幕。此 螢幕之對比度為400:1，為比實施例差者。 [比較例3] 本比較例中，於透明甲基丙烯酸樹脂板（8 mm厚）之單面 上貼合高透明螢幕「Dilad Screerl T4〇Si」（株式會社 KIMOTO製）’獲得光線透過率為73%之螢幕。此螢幕之對 比度為420:1。 [表1] 光散射 劑濃度(ppm) 光散射劑種類 光線透過 率(％) 基材層 主光散射層 基材層 主光散射層 對比度 實施例1 2.5 1,000 Al2〇3 A1203 90 910-1 實施例2 0.5 1,000 AI2O3 Al2〇3 91 800.1 實施例3 4.5 1,000 A1203 A1203 86 620-1 實施例4 0.5 1,000 Ti〇2 A1203 89 780-1 實施例5 2.5 1,000 A1203 Al203 88 820-1 實施例6 0.1 1,000 Ti〇2 a1203 91 650Ί 比較例1 5 1,000 A1203 A1203 84 570:1 比較例2 "------ 0 1,000 一 A1203 91 400 ] 比較例3 0 薄膜貼合 T40Si L _ - 73 420:1 *Ah〇3之平均粒直徑：實施例5以外為〇 5 μιη、實施例5為1 128453.doc •21 · 200900844 產業上利用可能性 :發明之穿透式榮幕上映出之影像鮮明，當然可使用作 二X的螢幕，且其背景視覺辨認性亦優良，故可以做為 =宣傳、導引機構應用於櫥窗、公共設施、及公司前 又’由於適用於所使用之基本樹脂的加卫法全部可使 Γ 故例如’可以加工成半圓形狀進行晝像投射，可使用 u為過去所沒有的、富有設計性的螢幕。 【圖式簡單說明】 圖1為第1實施形態之穿透式螢幕的立體圖。 圖2為第1實施形態之穿透式螢幕之使用狀態的剖面圖。 Η3為第2實施形態之穿透式螢幕的立體圖。 曰為第2只把幵》態之穿透式螢幕之使用狀態的 【主要元件符號說明】 ° 2 3 10 11 主光散射層 基材層 投射器 第1實施形態之穿透式螢幕 第2實施形態之穿透式螢幕 128453.doc -22-Max. and brightness min• the value obtained. Contrast can be expressed as brightness: brightness min. ‘Contrast ratio can also be expressed as “brightness”. When the contrast is 丨 or more, the contrast ratio (brightness max./brightness min.) is 600 or more. When the contrast ratio is 600:1 or more, the sharpness of the image is sufficient, and the performance of the penetrating screen becomes high. The degree of twist is preferably cap: ^ or more, preferably more than 7 0 0:1. The transmissive screen of the present invention is not limited to the form of the penetrating screen of the first embodiment: the screen type H) and the penetrating screen of the second embodiment, and various ids such as 'as long as the light is retained For the transmittance and contrast, a layer of # /, θ may be provided between the main light-scattering layer 1 and the substrate layer 2 of the wear-through screen 10 or 11, for example, the main light-scattering layer 1 and the substrate layer 2 may be improved. The coupling layer of the partner. For the exchange, --- ^ ^ can also be placed on the outermost surface of the transmissive screen antistatic layer or surface protection layer. Next, a method of manufacturing a transmissive screen will be described. As described above, the base layer and the main light scattering layer of the curtain can be used as the first light transmissive resin or the first tree = the resin (hereinafter referred to as "light through knife" 1 light scattering agent Or a second light-scattering agent (hereinafter referred to as "light-scattering agent" by 128453.doc -15-200900844), and the obtained light-transmitting resin composition is obtained by extrusion-casting into a sheet form. Resin composition = manufacturing method, and it is not particularly limited as long as the light-scattering agent fine particles are uniformly dispersed in the light-transmitting resin, and a more preferable method is as follows. The substrate layer and the main light of the transmissive screen are produced. When the light-transmitting resin composition containing the fine particles of the light-transmitting resin and the light-scattering agent of the scattering layer is used as a method of uniformly dispersing the light-scattering agent fine particles in the light-transmitting resin, for example, the following (1) or (2) can be used. (1) A method of melt-kneading a transparent thermoplastic resin which becomes a substrate layer and a main light-scattering layer and a fine particle of a light-scattering agent by an extruder: In this case, a light scattering agent is preferably used in the ultrasonic generating device. Microparticles Disperse in an organic liquid to form a light scattering agent dispersion. The resulting light scattering agent dispersion is mixed with a light transmissive resin. The organic liquid used in the slag is melted and kneaded by an extruder. There are no restrictions on the dissolution, expansion, etc. of the particles of the light scattering agent, and it can be dispersed in any ratio. In addition, various organic liquids can be mixed in any ratio according to the dispersion state. In addition to the organic body, the polymerizable monomer constituting the light-transmitting resin is not particularly limited as long as it is difficult to cause the dispersion (4) of the particles to be dissolved or expanded. Further, a plurality of organic liquids may be mixed and used in an arbitrary ratio depending on the state of dispersion of the light-scattering agent fine particles. As the general organic liquid, acrylonitrile, methyl ethyl ketone or the like; aromatics such as xylene or toluene; and alcohols such as methanol and ethanol can be used. Further, as a polymerizable monomer of 128453.doc 200900844, for example, a light transmissive resin may be a methyl group, and a methyl methacrylate, methacrylic acid, methacrylic acid (tetra), or methacrylic acid butyl acrylate may be used. Methyl acrylic acid cyclohexanide, methyl acrylate acid base, methacrylic acid 2 - ethyl hexanoic acid and other methyl acrylate acid; a glyceric acid, acrylic acid, propylene Sour acid brewing, acrylic acid ring brewing, acrylic acid phenyl, acrylic acid 2_ethyl hexanoic acid and other acrylic acid brewing; methyl acrylic acid, acrylic acid and other unsaturated acids.混合 The mixing ratio of the light scattering agent microparticles to the organic liquid can be arbitrarily determined in consideration of the dispersibility of the light scattering agent age, but it is preferable to reset the portion of the light scattering agent microparticles relative to the organic liquid (10) to a weight of 1 to 8 〇. The range of parts is mixed. Further, the mixing ratio of the light-scattering agent composed of the light-scattering agent particles and the organic liquid to the light-transmitting resin is arbitrarily determined by the (four) property in the extrusion step, but preferably relative to the (four) property. The resin (10) parts by weight, and the dispersion is mixed in the range of 0.001 to 10 parts by weight. - The method of mixing the light scattering agent dispersion with the light transmissive resin is not particularly limited, for example, it can be mixed by Henschel's scrambler mixing, by super effect air-floating mixing, by a mixing method of drum mixing . Further, the extruder for the melt-kneading of the above mixture is not necessarily particularly limited as long as it is a conventional uniaxial or biaxial extruder.苴 : The viewpoint of removing the volatile component of the organic liquid used for dispersing is preferably a volatilizing extruder having a discharge port (< v), preferably 300 Torr or less. And 'the extrusion die is preferably a multi-layer extrusion die that controls the integrity of each layer.曰 Furthermore, the viewpoint of preventing secondary agglutination of light scattering agent particles is preferably manufactured by using a twin-screw extruder at 128453.doc -17-200900844. The temperature of the extruder can be arbitrarily set depending on the type of the light transmissive resin to be used. For example, when a methacrylic resin is used as the light-transmitting resin, it is about 18 to 26 (r). (2) A method of obtaining a screen by a polymerization method. · In this case, it is possible to use ultrasonic waves. The device disperses the light-scattering agent fine particles in a raw material monomer of the light-transmitting resin or a monomer which can copolymerize σ with the monomer. In this case, the light-scattering agent fine particles are preferably dispersed in advance to one of the raw material monomers. In the above, it is mixed and used in a partially polymerized polymer solution, etc. The amount ratio of the light scattering agent fine particles to the raw material monomers of the dispersed light scattering agent fine particles can be adjusted according to the dispersibility, the viscosity at the time of the damage, and the maneuverability. The method of forming the poly-porting conditions or the sheet (washing and casting plate) of the polymerization temperature, the polymerization time, the polymerization start dose, etc. of the casting method is also not particularly limited. The sheet shape method can be cast using, for example, a glass unit. Method, continuous casting method, etc. The surface of the penetrating screen obtained by the manufacturing method of the wrong (1) or (2) has a specular gloss due to the low concentration of the light scattering agent, ^ ψ j is still in contrast Further, the Zhao sound wave generating device used for the fine particles is not particularly limited, and a commercially available hot, *, upper, +, ear wave β washing machine or ultrasonic stirrer can be used. For example, the ultrasonic frequency is generally used. (4) The sheep is an ultrasonic cleaner of 28 kHZ to 1 G () kHz. The irradiation time of the ultrasonic generating device can be arbitrarily set according to the dispersion state of the light scattering agent particles. The sigh is generally preferably irradiated for about 1 minute to 60 minutes. The embodiment of the embodiment will be specifically described. However, the present invention is not limited to the embodiments according to the embodiment. The present invention is not limited to the embodiments. The results obtained in the examples are shown in Table 1. [Example 1] 2.5 ppm of alumina having an average particle diameter of μ. 5 μηι as a light scattering agent was blended into Drupe LP-1 (methacrylic resin: Asahi Kasei Chemicals In the product of the company, a resin for a base material layer is prepared. Then, the resin for the main light-scattering layer is prepared by incorporating the above-mentioned alumina crucible into Druppet 1. The base layer is filled with a resin into a screw. straight For the extruder of 12〇mm(j), L/D (extrusion length/extrusion diameter)=32, the main light scattering layer is filled with resin into the screw with a screw diameter of 40 ιηιηφ and L/D=32. Press, using these extruders to extrude a laminated sheet formed into a thickness of 8 mm, a width of i120 mm, and a length of 23 mm to obtain a screen thickness of 200 μm, and a light transmittance of 9 〇. In addition, here, as a method of measuring the average particle diameter of the light-scattering agent, the light-scattering agent fine particles are dispersed in an organic liquid by ultrasonic waves, and the obtained dispersion liquid is measured by a microscopic method to obtain a cumulative particle diameter of 5% by weight. Average grain diameter. The laminated sheet is raised as a screen, and the "white" image and the black image are imaged on the sheet from the back by a projector. The brightness is measured from the front with a luminance meter, and the brightness is max. / brightness min. . In addition, as a device for generating white and black, rNTSC Test Signal Generator 435 j (Leader Electronics Corporation)' is projected by "Inte Gem pr〇ject〇r ip_55" (manufactured by Nippon Aeronautical Electronics Co., Ltd.) Screen. The brightness meter uses bm_7 (made by Topcon). Its ..σ fruit, contrast (party max / brightness min) is 91〇”, showing the high contrast that was not available in the past 128453.doc 200900844. [Example 2] A multilayer sheet was extruded in the same manner as in Example 1 except that the light-scattering dose of the substrate layer was 0.5 ppm, and a screen having a first-line transmittance of 9 1 °/〇 was obtained. The contrast ratio of this screen was _:1, and the degree of display was the same as in the first embodiment. [Example 3] Except that the light-scattering dose of the substrate layer was 45 ppm, the other disk Example 1 was squeezed by more than m, and a light transmittance of 86% was obtained: the contrast of the screen was 620:1. , shows a lower contrast than the implementation (1) but still higher than the existing through screen (Comparative Example 2). [Example 4] Except that the light-scattering agent of the base material layer was changed to titanium dioxide having an average particle diameter, the same procedure as in Example 2 was carried out, and a plurality of layers were extruded to obtain a curtain having an optical transmittance of 89%. The contrast ratio of this screen was 78 〇:1, which showed high contrast as in the first embodiment. [Example 5] A multilayer sheet was extruded in the same manner as in Example 1 except that the average alumina particle diameter was 丨μπι, and a screen having a light transmittance of 88% was obtained. The contrast ratio of this screen is 820: :!', which shows high contrast as in the example i. [Example 6] A multilayer sheet was extruded in the same manner as in Example 4 except that the light-scattering agent concentration of the substrate layer was changed to 〇. i ppm, and a light curtain having a light transmittance of 91% was obtained. The contrast ratio of this screen is 650:1 ’ for high contrast. [Comparative Example 1] The same procedure as in Example 1 was carried out except that the light-scattering agent "S of the substrate layer was 5 ppm, and the light transmittance was 84 Å/. The screen. The contrast ratio of this screen is 570:1, which is worse than the embodiment. [Comparative Example 2] Other than the embodiment in which the light scattering agent was not placed in the base material layer! Similarly, the multilayer sheet was extruded to obtain a screen having a light transmittance of 9 1 °/〇. The contrast ratio of this screen is 400:1, which is worse than the example. [Comparative Example 3] In this comparative example, a high transparent screen "Dilad Screerl T4〇Si" (manufactured by KIMOTO Co., Ltd.) was attached to one surface of a transparent methacrylic resin sheet (8 mm thick) to obtain light transmittance. 73% of the screen. This screen has a contrast ratio of 420:1. [Table 1] Light scattering agent concentration (ppm) Light scattering agent type Light transmittance (%) Substrate layer Main light scattering layer Base material layer Main light scattering layer Contrast Example 1 2.5 1,000 Al2〇3 A1203 90 910-1 Implementation Example 2 0.5 1,000 AI2O3 Al2〇3 91 800.1 Example 3 4.5 1,000 A1203 A1203 86 620-1 Example 4 0.5 1,000 Ti〇2 A1203 89 780-1 Example 5 2.5 1,000 A1203 Al203 88 820-1 Example 6 0.1 1,000 Ti〇2 a1203 91 650Ί Comparative Example 1 5 1,000 A1203 A1203 84 570:1 Comparative Example 2 "------ 0 1,000 A A1203 91 400 ] Comparative Example 3 0 Film-bonded T40Si L _ - 73 420:1 *Ah〇3 average particle diameter: 实施5 μιη other than Example 5, and Example 5 is 1 128453.doc •21 · 200900844 Industrial use possibility: The image of the invention's penetrating glory is vivid, of course It can be used as a screen for the second X, and its background visibility is also excellent, so it can be used as a propaganda and guiding mechanism for windows, public facilities, and companies before the 'protection for the basic resin used. All of the methods can be made, for example, 'can be processed into a semicircular shape For keying projections, you can use u as a design screen that you didn't have in the past. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a transmissive screen according to a first embodiment. Fig. 2 is a cross-sectional view showing a state in which the transmissive screen of the first embodiment is used. Η3 is a perspective view of the transmissive screen of the second embodiment.主要 [The main component symbol description of the use state of the second type of transmissive screen] ° 2 3 10 11 Main light scattering layer base layer projector The second embodiment of the transmissive screen of the first embodiment Formal penetrating screen 128453.doc -22-