TWI625554B - Convex lens lens laminated body - Google Patents

Convex lens lens laminated body Download PDF

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Publication number
TWI625554B
TWI625554B TW102148448A TW102148448A TWI625554B TW I625554 B TWI625554 B TW I625554B TW 102148448 A TW102148448 A TW 102148448A TW 102148448 A TW102148448 A TW 102148448A TW I625554 B TWI625554 B TW I625554B
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Taiwan
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lens
lens sheet
convex
adhesive
lenticular lens
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TW102148448A
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Chinese (zh)
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TW201435396A (en
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Hideki Moriuchi
Tomohiro Nakata
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Shoei Printing Co Ltd
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G03B35/18—Stereoscopic photography by simultaneous viewing
    • G03B35/24—Stereoscopic photography by simultaneous viewing using apertured or refractive resolving means on screens or between screen and eye
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/005—Arrays characterized by the distribution or form of lenses arranged along a single direction only, e.g. lenticular sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0075—Arrays characterized by non-optical structures, e.g. having integrated holding or alignment means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B25/00—Viewers, other than projection viewers, giving motion-picture effects by persistence of vision, e.g. zoetrope
    • G03B25/02—Viewers, other than projection viewers, giving motion-picture effects by persistence of vision, e.g. zoetrope with interposed lenticular or line screen
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
  • Laminated Bodies (AREA)

Abstract

本發明提供一種凸鏡狀透鏡薄片積層體，其可將凸鏡狀透鏡薄片的透鏡表面加以平滑化，並維持所觀察到的影像的切換與立體性。凸鏡狀透鏡薄片積層體，由凸鏡狀透鏡薄片、被覆該凸鏡狀透鏡薄片的透鏡表面之被覆材料、及用於黏著該凸鏡狀透鏡薄片與該被覆材料之黏著劑所構成，該凸鏡狀透鏡薄片積層體的特徵在於：從由該被覆材料黏著後的凸鏡狀透鏡、被覆材料及黏著劑中的至少兩者所構成空隙的最低部直至最高部為止的距離H2，相對於從該凸鏡狀透鏡薄片的透鏡表面最低部直至最高部為止的距離H1之比率(H2/H1)為75%~95%，由前述被覆材料與前述黏著劑所構成之凸鏡狀透鏡薄片積層體被覆部的平行光線透射率為30%以上。 The present invention provides a convex lens-like lens sheet laminate, which can smooth the lens surface of the convex lens-like lens sheet and maintain the switching and three-dimensionality of the observed image. A convex lens-like lens sheet laminate is composed of a convex lens-like lens sheet, a covering material covering the lens surface of the convex lens-like lens sheet, and an adhesive agent for adhering the convex lens-like lens sheet and the covering material. The convex lenticular lens sheet laminate is characterized in that the distance H 2 from the lowest part to the highest part of the gap formed by at least two of the convex lens, the covering material, and the adhesive adhered by the covering material, is opposite. The ratio (H 2 / H 1 ) of the distance H 1 from the lowest portion to the highest portion of the lens surface of the convex lens-like lens sheet is 75% to 95%, and the convex lens is composed of the coating material and the adhesive. The parallel light transmittance of the coated portion of the lenticular lens sheet laminate is 30% or more.

Description

凸鏡狀透鏡薄片積層體 Convex lens lens laminated body

本發明關於一種凸鏡狀透鏡薄片積層體(lenticular lens sheet laminate)，其保持影像(image)會由於所觀看的角度而切換(switch)、或影像看起來是立體性的凸鏡狀透鏡薄片的影像視認性，且表面平滑。 The present invention relates to a lenticular lens sheet laminate, which maintains that the image is switched due to the viewing angle, or that the image looks like a three-dimensional lenticular lens sheet. The image is visible and the surface is smooth.

凸鏡狀透鏡薄片的結構是在經將複數個不同的影像分割成平行排成細長的長條詩箋狀的帶，並將各帶依序鄰接配列而成的影像薄片上，積層經將半圓狀的截面形狀的板蒸魚糕(Kamaboko)型的透鏡排成複數排的凸鏡狀透鏡而成，可顯示影像由於所觀看凸鏡狀透鏡薄片的角度而切換、或影像看起來是立體性的影像視認性。 The structure of a convex lens-like lens sheet is that an image sheet formed by dividing a plurality of different images into parallel long and long strips of poetic paper and successively arranging each of the bands in a row The slab-shaped steamed fish cake (Kamaboko) type lens is formed by a plurality of convex lens-like lenses arranged in a row, and the displayed image can be switched depending on the angle of the convex lens-like lens sheet viewed, or the image looks three-dimensional. Image visibility.

如上述，凸鏡狀透鏡的截面，由於呈半圓形狀，因此凸鏡狀透鏡薄片的透鏡表面(lens surface)是呈凸凹的形狀。通常，在看凸鏡狀透鏡薄片的影像時，由於從透鏡表面 側看，因此，在將凸鏡狀透鏡薄片用作為贈答用卡片或明信片(post card)等，並且若使用者欲在其上書寫信息等時，則透鏡表面的凹凸容易阻礙到書寫。此外，在磁卡等對表面要求平滑性者，由於凸鏡狀透鏡薄片的透鏡表面是呈凹凸，以致無法仍舊以其狀態直接使用。 As described above, since the cross section of the convex lens is semicircular, the lens surface of the convex lens is a convex and concave shape. Generally, when looking at the image of a convex lenticular lens sheet, Looking from the side, when the convex lens sheet is used as a gift card or post card, etc., and if a user wants to write information thereon, the unevenness of the lens surface is likely to hinder writing. In addition, in the case of magnetic cards and the like that require surface smoothness, the lens surface of the convex lens-like lens sheet is uneven, so that it cannot be used directly in its state.

作為針對於如此問題的解決對策，已提出一種方法，其在凸鏡狀透鏡薄片上將樹脂薄片或薄膜的被覆材料(covering material)隔著黏著劑(adhesive)而積層(專利文獻1~3)。 As a countermeasure against such a problem, a method has been proposed in which a covering material of a resin sheet or film is laminated on the convex lens sheet with an adhesive (Patent Documents 1 to 3). .

〔先前技術文獻〕 [Previous Technical Literature] (專利文獻) (Patent Literature)

專利文獻1：日本實開昭61-192873號公報 Patent Document 1: Japanese Unexamined Patent Publication No. 61-192873

專利文獻2：日本特開平10-217655號公報 Patent Document 2: Japanese Patent Application Laid-Open No. 10-217655

專利文獻3：日本特開2003-191666號公報 Patent Document 3: Japanese Patent Application Laid-Open No. 2003-191666

若為專利文獻1~3的方法，雖然可將凸鏡狀透鏡薄片的表面加以平滑化，但是卻會因透鏡表面是埋沒(burying)於被覆材料之黏著劑中而引起意料外的折射率的 變化，以致有損於以凸鏡狀透鏡薄片所觀察到的影像的切換或影像的立體性的視認性(visibility)。 In the methods of Patent Documents 1 to 3, although the surface of the convex lens-like lens sheet can be smoothed, the lens surface is buried in the adhesive of the coating material, causing an unexpected refractive index. The change causes damage to the switching of the image observed with the convex lens-like lens sheet or the three-dimensional visibility of the image.

此外，視被覆材料的表面粗糙度或折射率而定，會產生過度的光擴散，使得在凸鏡狀透鏡薄片所觀察到影像的切換模糊不清，而觀察到殘像。 In addition, depending on the surface roughness or refractive index of the coating material, excessive light diffusion may occur, so that the switching of the image observed in the convex lens sheet is blurred, and an afterimage is observed.

本發明是有鑑於上述問題而完成，且提供一種凸鏡狀透鏡薄片積層體，其可將凸鏡狀透鏡薄片的透鏡表面加以平滑化，並維持所觀察到的影像的切換與立體性。 The present invention has been made in view of the above-mentioned problems, and provides a lenticular lens sheet laminate, which can smooth the lens surface of the lenticular lens sheet and maintain the switching and three-dimensionality of the observed image.

本發明(1)是一種凸鏡狀透鏡薄片積層體，由凸鏡狀透鏡薄片、被覆該凸鏡狀透鏡薄片的透鏡表面之被覆材料、及用於黏著該凸鏡狀透鏡薄片與該被覆材料之黏著劑所構成，該凸鏡狀透鏡薄片積層體的特徵在於：從由該被覆材料黏著後的凸鏡狀透鏡、被覆材料及黏著劑中的至少兩者所構成空隙的最低部直至最高部為止的距離H2，相對於從該凸鏡狀透鏡薄片的透鏡表面最低部直至最高部為止的距離H1之比率(H2/H1)為75%以上，由前述被覆材料與前述黏著劑所構成之凸鏡狀透鏡薄片積層體被覆部(covering part)的平行光線透射率(parallel-light transmittance)為30%以上。 The present invention (1) is a lenticular lens sheet laminate, comprising a lenticular lens sheet, a covering material covering a lens surface of the lenticular lens sheet, and a lenticular lens sheet and the covering material. The lenticular lens sheet laminate is composed of an adhesive, and is characterized in that from the lowest portion to the highest portion of the gap formed by at least two of the lenticular lens, the covering material, and the adhesive adhered by the covering material. until the distance H 2, with respect to the lens surface of the convex lens shape of the lens sheet lowest portion until the highest portion of the distance H 1 of the ratio (H 2 / H 1) more than 75% by the coating material and the adhesive The parallel-light transmittance of the covering part of the convex lens-like lens sheet laminate formed is 30% or more.

本發明(2)是如本發明(1)所述之凸鏡狀透鏡薄片積層體，其中，前述凸鏡狀透鏡薄片的透鏡表面與前述被覆部是全面黏著，其黏著力(adhesive force)為0.1N/mm以上。 The present invention (2) is a laminated body of a convex lens-like lens sheet according to the present invention (1), wherein the lens surface of the convex lens-like lens sheet and the covering portion are fully adhered, and its adhesive force is Above 0.1N / mm.

本發明(3)是一種凸鏡狀透鏡薄片積層體，由凸鏡狀透鏡薄片、被覆該凸鏡狀透鏡薄片的透鏡表面之被覆材料、及用於黏著該凸鏡狀透鏡薄片與該被覆材料之黏著劑所構成，該凸鏡狀透鏡薄片積層體的特徵在於：具有被覆材料對該凸鏡狀透鏡薄片的黏著強度(adhesion strength)相對不同的區域，在弱黏著域中，從由該被覆材料黏著後的凸鏡狀透鏡、被覆材料及黏著劑中的至少兩者所構成空隙的最低部直至最高部為止的距離H2，相對於從該凸鏡狀透鏡薄片的透鏡表面最低部直至最高部為止的距離H1之比率(H2/H1)為75%以上，由前述被覆材料與前述黏著劑所構成之凸鏡狀透鏡薄片積層體被覆部的平行光線透射率為30%以上。 The present invention (3) is a lenticular lens sheet laminate, comprising a lenticular lens sheet, a covering material covering a lens surface of the lenticular lens sheet, and a lenticular lens sheet and the covering material. The convex lens-shaped lens sheet laminate is composed of an adhesive, and is characterized in that it has a region in which the adhesive strength of the convex lens-shaped lens sheet is relatively different. In the weak adhesion region, the coating is covered by the coating. The distance H 2 from the lowest part to the highest part of the gap formed by at least two of the convex lens-like lens, the covering material, and the adhesive after the material is adhered to the distance from the lowest part to the highest part of the lens surface of the convex lens sheet The ratio (H 2 / H 1 ) of the distance H 1 to the part is 75% or more, and the parallel light transmittance of the covering part of the convex lens-like lens laminated body composed of the coating material and the adhesive is 30% or more.

本發明(4)是如本發明(3)所述之凸鏡狀透鏡薄片積層體，其中，至少前述凸鏡狀透鏡薄片的透鏡表面與前 述被覆材料的強黏著域的黏著強度為0.3N/mm以上。 The present invention (4) is a convex lens-like lens sheet laminate according to the present invention (3), wherein at least the lens surface of the convex lens-like lens sheet and the front The adhesive strength of the strong adhesive region of the coating material is 0.3 N / mm or more.

本發明(5)是如本發明(3)所述之凸鏡狀透鏡薄片積層體，其中，在進行黏著前述凸鏡狀透鏡薄片的透鏡表面與前述被覆部時，在弱黏著域並未具有黏著層(adhesive layer)。 The present invention (5) is the lenticular lens sheet laminate according to the present invention (3), wherein when the lens surface of the lenticular lens sheet and the covering portion are adhered, the lenticular lens sheet does not have a weak adhesion region. Adhesive layer.

根據本發明，可提供一種凸鏡狀透鏡薄片積層體，其透鏡表面側表面是平滑，且可維持觀察到的影像的切換或立體性功能。 According to the present invention, it is possible to provide a convex lens-shaped lens sheet laminated body whose lens surface side surface is smooth and can maintain the switching or three-dimensional function of an observed image.

1、2、2a、2b、2c、2d、2e、2f‧‧‧凸鏡狀透鏡薄片積層體 1, 2, 2a, 2b, 2c, 2d, 2e, 2f ‧‧‧ convex lens sheet laminated body

10‧‧‧凸鏡狀透鏡薄片 10‧‧‧ convex lens lens sheet

11‧‧‧透鏡表面 11‧‧‧ lens surface

12‧‧‧印刷層 12‧‧‧print layer

20‧‧‧被覆部 20‧‧‧ Covered Department

21‧‧‧被覆材料 21‧‧‧ Covering material

22‧‧‧黏著層 22‧‧‧ Adhesive layer

41、41a、41b、41c、41d、41e、41f‧‧‧弱黏著域 41, 41a, 41b, 41c, 41d, 41e, 41f

42、42a、42b、43c、42d、42e、42f‧‧‧強黏著域 42, 42a, 42b, 43c, 42d, 42e, 42f

B‧‧‧截面觀察方向 B‧‧‧ Section observation direction

第1圖是示意地繪示本發明(1)的實施形態的凸鏡狀透鏡薄片積層體整體之正面圖(front view)(A)、及將第1圖(A)所示凸鏡狀透鏡薄片積層體由B-B線方向觀看而得的截面圖(cross-sectional view)(B)。 FIG. 1 is a front view (A) schematically showing the entire convex lens-like lens sheet laminate of an embodiment of the present invention (1), and a convex lens-like lens shown in FIG. 1 (A). A cross-sectional view (B) of the sheet laminate viewed from the BB line direction.

第2圖是示意地繪示本發明(3)的實施形態的凸鏡狀透鏡薄片積層體整體之正面圖(A)、及將第2圖(A)所示凸鏡狀透鏡薄片積層體由B-B線方向觀看而得的截面圖(B)。 Fig. 2 is a front view (A) schematically showing the entire convex lens-like lens sheet laminate according to the embodiment of the present invention (3), and the convex lens-like lens sheet laminate shown in Fig. 2 (A) is composed of A cross-sectional view (B) when viewed in the BB line direction.

第3圖是繪示本發明(3)的實施形態的凸鏡狀透鏡 薄片積層體的黏著強度不同的區域的形狀例之正面圖。 FIG. 3 is a convex lens lens showing an embodiment of (3) of the present invention. A front view of a shape example of a region in which the sheet laminate has different adhesive strength.

在下文中，則將本發明的實施形態根據圖式加以說明。然而，當然本發明並非限定於此，經以在不致於損及凸鏡狀透鏡薄片的影像的切換或立體性的視認性下進行該處理，只要是其為提高、維持品質特性的用途時，則當然應該可利用本實施形態。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, as a matter of course, the present invention is not limited to this, and the process is performed under the condition that the switching of the lenticular lens sheet or the three-dimensional visibility is not impaired, so long as it is used for improving and maintaining quality characteristics, Of course, this embodiment should be available.

如第1圖所示，凸鏡狀透鏡薄片積層體1，主要具備凸鏡狀透鏡薄片10與被覆部20。被覆部20包含被覆材料21與黏著層22。凸鏡狀透鏡薄片10包含具有透鏡表面11的透鏡部(lens part)與印刷層12。透鏡部，在此實施形態中包含例如具有半圓形狀的截面並朝一方向延伸的許多板蒸魚糕形狀的透鏡。此外，透鏡部的透鏡可不是板蒸魚糕形狀，也可為截面是半圓形狀而非為板蒸魚糕形狀者。在凸鏡狀透鏡薄片10的非透鏡表面(non-lens surface)則形成有印刷層12。 As shown in FIG. 1, the convex lens-like lens sheet laminate 1 mainly includes a convex lens-like lens sheet 10 and a covering portion 20. The covering portion 20 includes a covering material 21 and an adhesive layer 22. The convex lens-like lens sheet 10 includes a lens part having a lens surface 11 and a print layer 12. The lens portion in this embodiment includes, for example, a plurality of plate-steamed fish cake-shaped lenses having a semicircular cross section and extending in one direction. In addition, the lens of the lens part may not be the shape of a steamed fish cake, and may be a shape with a semicircular cross section instead of the shape of a steamed fish cake. A printed layer 12 is formed on a non-lens surface of the convex lens-like lens sheet 10.

被覆材料21是使用薄片狀的合成樹脂，例如，以纖維素三醋酸酯(TAC)、聚對苯二甲酸乙二醇酯(PET)、聚氯乙烯(PVC)、聚碳酸酯(PC)作為主成分者。此 外，也可使用玻璃作為被覆材料21。 The covering material 21 is a sheet-like synthetic resin. For example, cellulose triacetate (TAC), polyethylene terephthalate (PET), polyvinyl chloride (PVC), and polycarbonate (PC) are used. The principal component. this Alternatively, glass may be used as the covering material 21.

被覆材料21的厚度較佳為30μm以上，更佳為100μm以上200μm以下。即使為少於30μm的被覆材料21，也可藉由被覆材料21來緩和凸鏡狀透鏡薄片10表面本來的凹凸，但是其效果將變弱。 The thickness of the covering material 21 is preferably 30 μm or more, and more preferably 100 μm or more and 200 μm or less. Even if the covering material 21 is less than 30 μm, the covering material 21 can reduce the unevenness on the surface of the lenticular lens sheet 10 originally, but its effect will be weakened.

黏著層22，例如可任意地使用：熱塑性樹脂(聚醋酸乙烯酯、聚乙烯醇、聚氯乙烯、聚醯胺、聚甲基丙烯酸甲酯、硝化纖維素、醋酸纖維素、熱塑性環氧樹脂、聚苯乙烯、乙烯-醋酸乙烯酯共聚物、或乙烯-丙烯酸乙酯共聚物等)；熱硬化型樹脂(環氧樹脂、聚胺基甲酸酯樹脂等)；紫外線硬化型樹脂(丙烯酸酯系等)；或橡膠系樹脂(天然橡膠、再生橡膠、苯乙烯-丁二烯橡膠、丙烯腈-丁二烯橡膠、氯丁二烯橡膠、丁基橡膠、矽酮橡膠、乙烯-丙烯橡膠等)。 The adhesive layer 22 can be arbitrarily used, for example, a thermoplastic resin (polyvinyl acetate, polyvinyl alcohol, polyvinyl chloride, polyamide, polymethyl methacrylate, nitrocellulose, cellulose acetate, thermoplastic epoxy resin, Polystyrene, ethylene-vinyl acetate copolymer, or ethylene-ethyl acrylate copolymer, etc.); thermosetting resins (epoxy resins, polyurethane resins, etc.); UV-curing resins (acrylate-based) Etc.); or rubber-based resins (natural rubber, recycled rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, chloroprene rubber, butyl rubber, silicone rubber, ethylene-propylene rubber, etc.) .

包含被覆材料21與黏著層22之被覆部20的平行光線透射率為30%以上，較佳為70%以上，更佳為80%以上。 The parallel light transmittance of the covering portion 20 including the covering material 21 and the adhesive layer 22 is 30% or more, preferably 70% or more, and more preferably 80% or more.

被覆材料21的平行光線透射率也可為少於30%。被覆材料21的平行光線透射率即使為少於30%，只要作為 被覆部20的平行光線透射率為30%以上即可。其理由為也有下列情況的緣故：例如，當被覆材料21的表面形成有如磨砂玻璃(毛玻璃)般的凹凸，即使以被覆材料21單獨的平行光線透射率為少於30%，但是黏著劑進入被覆材料21的表面凹凸而形成黏著層22時，作為黏著層22形成於被覆材料21上而成的被覆部20而言，平行光線透射率則變成30%以上，有時可作為被覆部20使用。 The parallel light transmittance of the covering material 21 may be less than 30%. Even if the parallel light transmittance of the covering material 21 is less than 30%, as long as The parallel light transmittance of the coating portion 20 may be 30% or more. The reason is that, for example, when the surface of the covering material 21 is formed with frost like frosted glass (frosted glass), even if the parallel light transmittance of the covering material 21 alone is less than 30%, the adhesive enters the coating. When the adhesive layer 22 is formed by the unevenness of the surface of the material 21, the cover 20 having the adhesive layer 22 formed on the cover 21 has a parallel light transmittance of 30% or more, and may be used as the cover 20.

從透鏡表面的最低部直至最高部為止的距離H2，相對於從透鏡表面的最低部直至最高部為止的距離H1之比率(H2/H1)為75%以上，較佳為90%以上。 The ratio (H 2 / H 1 ) of the distance H 2 from the lowest part to the highest part of the lens surface to the distance H 1 from the lowest part to the highest part of the lens surface is 75% or more, preferably 90%. the above.

在被覆部20與凸鏡狀透鏡薄片10的黏著域中，在全面黏著且黏著力並無相對性差異時的黏著力為0.1N/mm以上。在被覆部20與凸鏡狀透鏡薄片10的黏著域中，在黏著力有相對性差異時的情況，其強黏著域的黏著力為0.3N/mm以上。此外，在凸鏡狀透鏡薄片積層體的黏著域具有強黏著域時的情況，在弱黏著域無黏著層也可。 In the adhesion region of the coating portion 20 and the convex lens-like lens sheet 10, the adhesion force when the adhesion is all round and there is no relative difference in adhesion force is 0.1 N / mm or more. In the case where there is a relative difference in the adhesion force between the coating region 20 and the convex lens-shaped lens sheet 10, the adhesion force in the strong adhesion region is 0.3 N / mm or more. In addition, when the adhesion region of the convex lens-like lens sheet laminate has a strong adhesion region, there may be no adhesion layer in the weak adhesion region.

凸鏡狀透鏡薄片積層體1是可以例如以下列方法進行製作。 The lenticular lens sheet laminated body 1 can be produced, for example, by the following method.

首先，在凸鏡狀透鏡薄片10的非透鏡表面上，印刷包括圖案(pattern)或文字等的影像。影像的印刷是可使用例如平版印刷(offset printing)。 First, on the non-lens surface of the lenticular lens sheet 10, an image including a pattern or a character is printed. The image can be printed using, for example, offset printing.

其次，在被覆材料21的一側的表面上印刷黏著劑，以形成黏著層22。黏著層22也可在透鏡表面11上印刷黏著劑來形成。黏著劑的印刷是可使用例如絲網印刷(silk-screen printing)。 Next, an adhesive is printed on the surface of one side of the covering material 21 to form an adhesive layer 22. The adhesive layer 22 may also be formed by printing an adhesive on the lens surface 11. The printing of the adhesive can be performed using, for example, silk-screen printing.

其次，在凸鏡狀透鏡薄片10與被覆材料21間夾持黏著層22而使得凸鏡狀透鏡薄片10與被覆材料21重疊，並藉由壓合加工(press processing)，獲得凸鏡狀透鏡薄片積層體1。 Next, an adhesive layer 22 is sandwiched between the convex lens-like lens sheet 10 and the covering material 21 so that the convex lens-like lens sheet 10 and the covering material 21 overlap, and a convex lens-like lens sheet is obtained by press processing. Laminated body 1.

如第2圖(A)所示，凸鏡狀透鏡薄片積層體也可具有被覆部20與凸鏡狀透鏡薄片10的黏著力為不同的區域。黏著力為弱的區域視為弱黏著域41，而黏著力為強的區域視為強黏著域42。弱黏著域41，與第1圖的凸鏡狀透鏡薄片積層體1相同，從透鏡表面的最低部直至最高部為止的距離H2，相對於從透鏡表面的最低部直至最高部為止的距離H1之比率(H2/H1)為75%以上，被覆部的平行光線透射率為30%以上，但是強黏著域42，從透鏡表面的最 低部直至最高部為止的距離H2，相對於從透鏡表面的最低部直至最高部為止的距離H1之比率(H2/H1)也可為少於75%，被覆部的平行光線透射率也可為少於30%。 As shown in FIG. 2 (A), the convex lenticular lens sheet laminate may have a region in which the adhesive strength of the covering portion 20 and the convex lenticular lens sheet 10 are different. A region with weak adhesion is regarded as a weak adhesion region 41, and a region with strong adhesion is regarded as a strong adhesion region 42. The weak adhesion region 41 is the same as the convex lens-like lens sheet laminate 1 shown in FIG. 1, and the distance H 2 from the lowest part to the highest part of the lens surface is relative to the distance H from the lowest part to the highest part of the lens surface. The ratio of 1 (H 2 / H 1 ) is 75% or more, and the parallel light transmittance of the coating part is 30% or more. However, the strong adhesion region 42 is the distance H 2 from the lowest part to the highest part of the lens surface, relative to The ratio of the distance H 1 from the lowest part to the highest part of the lens surface (H 2 / H 1 ) may be less than 75%, and the parallel light transmittance of the coating part may be less than 30%.

例如，在凸鏡狀透鏡薄片10與被覆材料21間夾持黏著層22而使得凸鏡狀透鏡薄片10與被覆材料21重疊，並在藉由壓合加工以獲得凸鏡狀透鏡薄片積層體時，則僅藉由在周邊部(peripheral part)提高壓力等的加工而使得凸鏡狀透鏡薄片10與被覆材料21牢固地貼合。藉此，凸鏡狀透鏡薄片積層體的表面整體為平滑，在弱黏著域41確保影像的切換或立體性的視認性，並由於有強黏著域42而可獲得被覆部20不易從凸鏡狀透鏡薄片10剝下的凸鏡狀透鏡薄片積層體2。 For example, when the adhesive layer 22 is sandwiched between the convex lens-like lens sheet 10 and the covering material 21 so that the convex lens-like lens sheet 10 and the covering material 21 overlap each other, and when the convex lens-like lens sheet laminate is obtained by compression processing, , The convex lens sheet 10 and the covering material 21 are firmly bonded only by processing such as increasing pressure in a peripheral part. Thereby, the surface of the convex lens-like lens sheet laminate is smooth as a whole, the switching of images or three-dimensional visibility is ensured in the weak adhesion area 41, and the covering portion 20 is difficult to obtain from the convex lens shape due to the strong adhesion area 42 The convex lens-like lens sheet laminate 2 in which the lens sheet 10 is peeled off.

如第3圖所示，弱黏著域41與強黏著域42是可構成為所欲的形狀。例如，如第3圖(A)所示，也可將凸鏡狀透鏡薄片積層體2a的整體截成圓形，將較偏於中心部分作為弱黏著域41a，而在周邊部形成強黏著域42a。又相反地，如第3圖(B)所示，也可將凸鏡狀透鏡薄片積層體2b的整體截成圓形，將較偏於中心部分作為強黏著域42b，而在周邊部形成弱黏著域41b。 As shown in FIG. 3, the weak adhesion domain 41 and the strong adhesion domain 42 can be formed into desired shapes. For example, as shown in FIG. 3 (A), the entire convex lenticular lens sheet laminated body 2a may be cut into a circle, and a portion slightly biased toward the center may be used as a weak adhesion region 41a, and a strong adhesion region may be formed at the peripheral portion. 42a. Conversely, as shown in FIG. 3 (B), the entire convex lens-shaped lens sheet laminate 2b may be cut into a circle, and the central portion may be used as a strong adhesion region 42b, and a weak portion may be formed at the peripheral portion. Adhesive domain 41b.

此外，如第3圖(C)所示，也可將凸鏡狀透鏡薄片積層體2c截斷成矩形狀，並非在周緣部(rim part)整體上，而是沿著相對的一對的邊在周緣部形成強黏著域42c。如第3圖(D)所示，也可將凸鏡狀透鏡薄片積層體2d截成矩形狀，並非在周緣部整體上，而是僅沿著一邊在周緣部形成強黏著域42d。 In addition, as shown in FIG. 3 (C), the convex lens-shaped lens sheet laminate 2c may be truncated into a rectangular shape, not on the entire rim part, but along the opposite pair of sides. The peripheral edge portion forms a strong adhesion domain 42c. As shown in FIG. 3 (D), the convex lens-shaped lens sheet laminate 2d may be cut into a rectangular shape, and the strong adhesion region 42d may not be formed on the entire peripheral edge portion, but only along one side.

如第3圖(E)所示，也可將凸鏡狀透鏡薄片積層體2e的整體分成兩個弱黏著域41e而形成強黏著域42e。如第2圖(F)所示，也可在矩形狀的凸鏡狀透鏡薄片積層體2f的四角落形成強黏著域42f，並將其他部分形成為弱黏著域41f。 As shown in FIG. 3 (E), the entire convex lenticular lens sheet laminate 2e may be divided into two weak adhesion regions 41e to form a strong adhesion region 42e. As shown in FIG. 2 (F), strong adhesion regions 42f may be formed at the four corners of the rectangular convex lens-like lens sheet laminate 2f, and other portions may be formed as weak adhesion regions 41f.

其他，若不致於阻礙凸鏡狀透鏡薄片的影像的切換或立體性的視認性時，則可自由形成弱黏著域41與強黏著域42的位置與形狀。 In addition, the positions and shapes of the weakly-adhered domain 41 and the strongly-adhesive domain 42 can be formed freely if the switching of the images of the convex lenticular lens sheet and the visibility of the three-dimensionality are not hindered.

[實施例] [Example]

關於本發明，列舉實施例及比較例更具體地加以說明，但是本發明並不受限於此等實施例。 The present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples.

(凸鏡狀透鏡薄片) (Convex lens lens sheet)

作為凸鏡狀透鏡薄片是使用透鏡線數為75LPI(每英吋的線數：Lines Per Inch)、厚度為0.46mm者。材質為A-PET(非結晶性-聚對苯二甲酸乙二醇酯)。 As the convex lens-like lens sheet, a lens with a lens line number of 75 LPI (lines per inch: Lines Per Inch) and a thickness of 0.46 mm was used. The material is A-PET (amorphous-polyethylene terephthalate).

(黏著層) (Adhesive layer)

作為黏著劑，可使用太陽印墨製造公司(Taiyo Ink Mfg.Co.Ltd.)製的RCA2000系列(熱硬化型聚酯系黏著劑)。 As the adhesive, an RCA2000 series (thermosetting polyester adhesive) manufactured by Taiyo Ink Mfg. Co. Ltd. can be used.

(被覆材料) (Cover material)

作為被覆材料，可使用聚氯乙烯(PVC)、聚對苯二甲酸乙二醇酯(PET)、聚對苯二甲酸乙二醇酯(二醇改質聚酯：PETG)、纖維素三醋酸酯(TAC)、聚碳酸酯(PC)、及透明玻璃。 As the covering material, polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyethylene terephthalate (diol modified polyester: PETG), and cellulose triacetate can be used. Ester (TAC), polycarbonate (PC), and transparent glass.

〔實施例1〕 [Example 1]

在凸鏡狀透鏡薄片的非透鏡表面上，藉由平版印刷加以印刷包含圖案與文字的影像。被覆材料是使用三菱樹脂公司(Mitsubishi Plastics,Inc.)製聚氯乙烯薄片(品名：VINYFOIL、厚度：100μm)，並對此藉由絲網印刷加以印刷黏著劑(RCA2000)，以作為被覆部。將前述凸鏡狀透鏡薄片與前述被覆部在100℃、7MPa/m2的條件下進行 壓合加工2分鐘，獲得凸鏡狀透鏡薄片積層體。 On the non-lens surface of the convex lens-like lens sheet, an image including a pattern and text is printed by lithography. As a coating material, a polyvinyl chloride sheet (product name: VINYFOIL, thickness: 100 μm) made by Mitsubishi Plastics, Inc. was used, and an adhesive (RCA2000) was printed by screen printing for the coating portion. The convex lens-like lens sheet and the covering part were subjected to a compression bonding process at 100 ° C. and 7 MPa / m 2 for 2 minutes to obtain a convex lens-like lens laminate.

〔實施例2〕 [Example 2]

在前述實施例1的被覆材料是使用三菱樹脂公司製聚氯乙烯薄片(品名：VINYFOIL、厚度：200μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the foregoing Example 1, a polyvinyl chloride sheet (product name: VINYFOIL, thickness: 200 μm) made by Mitsubishi Resin Co. was used as the coating material, and the remaining conditions were the same as those in Example 1 to obtain a convex lens-shaped lens sheet laminate.

〔實施例3〕 [Example 3]

在前述實施例1的被覆材料是使用太平化學製品公司(Taihei Chemical Industrial Co.,Ltd.)製聚氯乙烯薄片(品名：PVC Overlay Sheet、厚度：100μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the foregoing Example 1, the covering material was a polyvinyl chloride sheet (product name: PVC Overlay Sheet, thickness: 100 μm) made by Taihei Chemical Industrial Co., Ltd., and the remaining conditions were the same as in Example 1. Or, a convex lens-shaped lens sheet laminate is obtained.

〔實施例4〕 [Example 4]

在前述實施例1的被覆材料是使用三菱樹脂公司製聚對苯二甲酸乙二醇酯(品名：DIAFOIL、厚度：100μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the foregoing Example 1, the coating material was polyethylene terephthalate (product name: DIAFOIL, thickness: 100 μm) made by Mitsubishi Resin Co., and the remaining conditions were the same as those in Example 1, and a convex lens lens sheet was obtained. Laminated body.

〔實施例5〕 [Example 5]

在前述實施例1的被覆材料是使用帝人公司(Teijin Limited)製聚碳酸酯(品名：Panlite、厚度：100μm)， 其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 The coating material in Example 1 was made of polycarbonate (product name: Panlite, thickness: 100 μm) made by Teijin Limited. The remaining conditions were the same as those in Example 1 to obtain a convex lens-shaped lens sheet laminate.

〔實施例6〕 [Example 6]

在前述實施例1的被覆材料是使用富士薄膜公司(FUJIFILM Corporation)製纖維素三醋酸酯(品名：FUJITAC、厚度：45μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the foregoing Example 1, the cellulose triacetate (product name: FUJITAC, thickness: 45 μm) made by FUJIFILM Corporation was used as the coating material, and the remaining conditions were the same as those in Example 1, and a convex lens lens sheet was obtained. Laminated body.

〔實施例7〕 [Example 7]

在前述實施例1的被覆材料是使用透明玻璃(厚度：1200μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the aforementioned covering material of Example 1, a transparent glass (thickness: 1200 μm) was used, and the remaining conditions were the same as those of Example 1 to obtain a convex lens-shaped lens sheet laminate.

〔實施例8〕 [Example 8]

在前述實施例1的被覆材料是使用東麗工業(股)公司(Toray Industries,Inc.)製聚對苯二甲酸乙二醇酯(品名：Lumirror、厚度：38μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the foregoing Example 1, the coating material was polyethylene terephthalate (product name: Lumirror, thickness: 38 μm) made by Toray Industries, Inc., and the remaining conditions were the same as those of the implementation. In the same manner as in Example 1, a convex lens sheet laminate was obtained.

〔實施例9〕 [Example 9]

在前述實施例1的被覆材料是使用東麗工業(股)公司 製聚對苯二甲酸乙二醇酯(品名：Lumirror、厚度：10μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the foregoing Example 1, the coating material used was Toray Industries Co., Ltd. Polyethylene terephthalate (product name: Lumirror, thickness: 10 μm) was prepared, and the remaining conditions were the same as those in Example 1 to obtain a convex lens-shaped lens sheet laminate.

〔實施例10〕 [Example 10]

在凸鏡狀透鏡薄片的非透鏡表面上，藉由平版印刷加以印刷包含圖案與文字的影像。被覆材料是使用三菱樹脂公司製聚氯乙烯薄片(品名：VINYFOIL、厚度：100μm)，並僅對此被覆材料的外周部藉由絲網印刷加以印刷黏著劑(RCA2000)，以作為被覆部。將前述凸鏡狀透鏡薄片與前述被覆部在100℃、7MPa/m2的條件下進行壓合加工2分鐘，獲得凸鏡狀透鏡薄片積層體。 On the non-lens surface of the convex lens-like lens sheet, an image including a pattern and text is printed by lithography. The covering material was a polyvinyl chloride sheet (product name: VINYFOIL, thickness: 100 μm) manufactured by Mitsubishi Resin Co., and only an outer peripheral portion of the covering material was printed with an adhesive (RCA2000) by screen printing as the covering portion. The convex lens-like lens sheet and the covering part were subjected to a compression bonding process at 100 ° C. and 7 MPa / m 2 for 2 minutes to obtain a convex lens-like lens laminate.

〔實施例11〕 [Example 11]

在前述實施例10的被覆材料是使用三菱樹脂公司製聚氯乙烯薄片(品名：VINYFOIL、厚度：200μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the foregoing Example 10, a polyvinyl chloride sheet (product name: VINYFOIL, thickness: 200 μm) made by Mitsubishi Resin Co. was used as the coating material, and the remaining conditions were the same as those in Example 1 to obtain a convex lens-shaped lens sheet laminate.

〔實施例12〕 [Example 12]

在前述實施例10的被覆材料是使用東麗工業(股)公司製聚對苯二甲酸乙二醇酯(品名：Lumirror、厚度：38μ m)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the coating material of Example 10, polyethylene terephthalate (product name: Lumirror, thickness: 38 μ) manufactured by Toray Industries Co., Ltd. was used. m), and the other conditions are the same as those in Example 1, and a convex lens-shaped lens sheet laminate is obtained.

〔比較例1〕 [Comparative Example 1]

在前述實施例1的被覆材料是使用三菱樹脂公司製聚對苯二甲酸乙二醇酯〔二醇改質聚酯：PETG〕(品名：DIAFIX、厚度：100μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the foregoing Example 1, the coating material was polyethylene terephthalate [diol-modified polyester: PETG] (product name: DIAFIX, thickness: 100 μm) made by Mitsubishi Resin, and the remaining conditions were the same as those in the example. In the same case, a convex lens sheet laminate is obtained.

〔比較例2〕 [Comparative Example 2]

在前述實施例1的被覆材料是使用三菱樹脂公司製聚對苯二甲酸乙二醇酯〔二醇改質聚酯：PETG〕(品名：DIAFIX、厚度：50μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the foregoing Example 1, the coating material was polyethylene terephthalate [diol-modified polyester: PETG] (product name: DIAFIX, thickness: 50 μm) made by Mitsubishi Resins. The remaining conditions were the same as those in the example. In the same case, a convex lens sheet laminate is obtained.

〔比較例3〕 [Comparative Example 3]

在前述實施例1的被覆材料是使用三菱樹脂公司製聚氯乙烯(品名：VINYFOIL、厚度：500μm)，其餘條件則為與實施例1相同者，獲得凸鏡狀透鏡薄片積層體。 In the foregoing Example 1, the covering material was made of polyvinyl chloride (product name: VINYFOIL, thickness: 500 μm) made by Mitsubishi Resin Co., and the remaining conditions were the same as those in Example 1 to obtain a convex lens-shaped lens sheet laminate.

(被覆材料的平行光線透射率測定) (Measurement of parallel light transmittance of coating material)

將上述實施例1至實施例9、及比較例1至比較例3 的被覆材料切出成邊長5cm的四方形，使用須賀試驗機公司(Suga Test Instruments Co.,Ltd.)製的霧度計(Haze Meter)測定平行光線透射率(Tp)。 The above-mentioned Examples 1 to 9 and Comparative Examples 1 to 3 The covering material was cut into squares with a side length of 5 cm, and the parallel light transmittance (Tp) was measured using a haze meter made by Suga Test Instruments Co., Ltd.

(被覆部的平行光線透射率測定) (Measurement of Parallel Light Transmittance of Covered Part)

在上述實施例1至實施例9、及比較例1至比較例3的被覆材料上，塗佈太陽印墨製造公司製的RCA2000作為黏著劑，並將在100℃進行加熱、硬化者切出成5cm四方形，使用須賀試驗機公司製的霧度計測定平行光線透射率(Tp)。 The coating materials of Examples 1 to 9 and Comparative Examples 1 to 3 described above were coated with RCA2000 manufactured by Taiyo Ink Manufacturing Co., Ltd. as an adhesive, and those heated and cured at 100 ° C were cut into A 5 cm square was used to measure the parallel light transmittance (Tp) using a haze meter manufactured by Suga Tester Co., Ltd.

(高度比率(H2/H1)測定) (Height ratio (H 2 / H 1 ) measurement)

將上述實施例1至實施例12、及比較例1至比較例3的被覆材料，從凸鏡狀透鏡薄片剝下，使用小坂研究所(Kosaka Laboratory Ltd.)製的表面粗糙度測定器(SURFCORDER SE-30D)，測定被覆材料與凸鏡狀透鏡薄片各自的黏著面，獲得表面粗糙度曲線。將從凸鏡狀透鏡薄片的黏著面所獲得的表面粗糙度曲線的連續3個凹凸，亦即，從表面粗糙度曲線的頂點至谷底間的高度差平均值作為H1。其次，計算從被覆材料的黏著面所獲得的表面粗糙度曲線的連續3個凹凸，亦即，從表面粗糙度曲線的頂點至谷底間的高度差平均值，並將由前述H1減去的值作為 H2。從此等的H1及H2計算得高度比率(H2/H1)。此外，實施例10至12是測定不存在黏著層的中心附近。 The coating materials of Examples 1 to 12 and Comparative Examples 1 to 3 were peeled from the lenticular lens sheet, and a surface roughness tester (SURFCORDER) manufactured by Kosaka Laboratory Ltd. was used. SE-30D), the respective adhesive surfaces of the coating material and the convex lens-like lens sheet were measured to obtain a surface roughness curve. The three consecutive irregularities in the surface roughness curve obtained from the adhesive surface of the convex lens-like lens sheet, that is, the average value of the height difference from the vertex to the valley bottom of the surface roughness curve was taken as H 1 . Next, calculate three consecutive irregularities in the surface roughness curve obtained from the adhesive surface of the covering material, that is, the average value of the height difference from the vertex to the bottom of the surface roughness curve, and subtract the value from the aforementioned H 1 As H 2 . The height ratio (H 2 / H 1 ) is calculated from these H 1 and H 2 . In addition, Examples 10 to 12 were measured in the vicinity of the center where no adhesive layer was present.

此外，若被覆部與凸鏡狀透鏡薄片是牢固地黏著而無法剝下時，則也可根據藉由光學顯微鏡、電子顯微鏡等的截面觀察來測定高度比率。 In addition, if the covering portion and the convex lens-like lens sheet are firmly adhered and cannot be peeled off, the height ratio can also be measured by cross-sectional observation with an optical microscope, an electron microscope, or the like.

(視認性) (Visibility)

將以未積層被覆部的凸鏡狀透鏡薄片所觀察到的影像作為基準，觀察由上述實施例1至實施例12、及比較例1至比較例3所成的影像。與作為基準的凸鏡狀透鏡薄片的影像無差異者為「◎」；與作為基準的凸鏡狀透鏡薄片的影像相比較，稍微有差異，但是在實用上並無問題者為「○」；與作為基準的凸鏡狀透鏡薄片的影像相比較，有差異(例如，可清楚視認到殘像)者為「△」；與作為基準的凸鏡狀透鏡薄片的影像相比較，差異較大(例如，影像完全不切換)者為「×」。 Based on the images observed by the convex lens-like lens sheet of the unlaminated coating portion, the images formed by the above-mentioned Examples 1 to 12 and Comparative Examples 1 to 3 were observed. The image that is not different from the image of the lenticular lens sheet as a reference is "◎"; the image is slightly different from that of the image of the lenticular lens sheet as the reference, but "○" is not a problem in practical use; Compared with the image of the lenticular lens sheet as the reference, the difference (for example, the afterimage can be clearly recognized) is "△"; compared with the image of the lenticular lens sheet as the reference, the difference is large ( For example, the image is not switched at all).

(平滑性) (Smoothness)

在上述實施例1至實施例12、及比較例1至比較例3的被覆部側，放置一般的複印用紙(單位面積重量60g/m2)，10人的參加者(paneler)以三菱鉛筆製的鉛筆(UNI, 3H)畫出圓，觀察其形狀。所畫的線會成為光滑的圓時，則視為平滑。所畫的線露出飛白、變形、變成虛線狀時，則視為非平滑。在根據該10人的參加者的評估中，在10人判斷為平滑時，則作為「4」；8人以上9人以下判斷為平滑時，則作為「3」；3人以上7人以下判斷為平滑時，則作為「2」；2人以下判斷為平滑時，則作為「1」。 General copy paper (weight per unit area of 60 g / m 2 ) was placed on the coated portion side of the above-mentioned Examples 1 to 12 and Comparative Examples 1 to 3, and 10 participants (paneler) were made of Mitsubishi pencil Draw a circle with your pencil (UNI, 3H) and observe its shape. When the drawn line becomes a smooth circle, it is considered smooth. When the drawn line is white, deformed, or broken, it is regarded as non-smooth. In the evaluation based on the 10 participants, when 10 people judged as smooth, it was regarded as "4"; when 8 or more people were judged as smooth, it was regarded as "3"; 3 or more people were judged as 7 or less When it is smooth, it is regarded as "2"; when it is judged as smooth by two people or less, it is regarded as "1".

(黏著力) (Adhesion)

凸鏡狀透鏡薄片與被覆部的黏著力是在上述實施例1至實施例12、及比較例1至比較例3的被覆部刻上寬度10mm的切口，剝離端部，並使用IMADA公司(IMADA Co.,Ltd.)製的標準型機械力計(Mechanical Force Gauges)(PS-10N)加以測定，以測定每1mm寬度的黏著力。 The adhesive force between the convex lens lens sheet and the covering portion was a cut of 10 mm in width from the covering portion of Examples 1 to 12 and Comparative Examples 1 to 3 above, and the end portion was peeled off, and IMADA Corporation (IMADA Co., Ltd.) made a mechanical force gauge (PS-10N) to measure the adhesive force per 1 mm width.

此外，被覆部的寬度為少於10mm時，則也可以適當的寬度測定黏著力，以測定每1mm寬度的黏著力。 In addition, when the width of the coating portion is less than 10 mm, the adhesive force can be measured with an appropriate width to measure the adhesive force per 1 mm width.

如表1所示，實施例1至實施例9的被覆部的平行光線透射率為30%以上，視認性良好。此外，特別是實施例3至實施例6的被覆部的平行光線透射率為80%以上，高度比率(H2/H1)為90%以上，視認性良好。相對於此，比較例1至3的被覆部的平行光線透射率卻為少於30%，以致視認性降低。其理由推斷是被覆材料的與黏著層為相反側的表面並非為平滑，引起在其表面的光散射，並且，在比較例3中，則因其厚度較厚，為500μm，引起強烈內部散射的緣故。實施例7的玻璃是使用更厚者，但是由於其表面為平滑，且平行光線透射率高，因此可認為光散射 比較受到抑制。若為實施例10至12，由於黏著層僅為外周部，因此在所觀察影像的區域並無黏著層，使得高度比率提高，結果導致視認性提高。此外，平滑性是如實施例2、實施例7、比較例3的結果所示，明顯取決於被覆材料的厚度。 As shown in Table 1, the parallel light transmittance of the coated portions of Examples 1 to 9 was 30% or more, and the visibility was good. In addition, in particular, the coated portions of Examples 3 to 6 had a parallel light transmittance of 80% or more, a height ratio (H 2 / H 1 ) of 90% or more, and good visibility. In contrast, the parallel light transmittance of the coated portions of Comparative Examples 1 to 3 was less than 30%, so that the visibility was reduced. The reason is presumed that the surface of the coating material on the side opposite to the adhesive layer is not smooth and causes light scattering on the surface. In Comparative Example 3, the thickness is 500 μm, which causes strong internal scattering. reason. The glass of Example 7 is thicker. However, since the surface is smooth and the parallel light transmittance is high, it is considered that light scattering is relatively suppressed. In Examples 10 to 12, since the adhesive layer is only the peripheral portion, there is no adhesive layer in the region of the observed image, so that the height ratio is increased, and as a result, the visibility is improved. In addition, the smoothness is as shown in the results of Example 2, Example 7, and Comparative Example 3, and obviously depends on the thickness of the coating material.

凸鏡狀透鏡薄片的透鏡表面與被覆部的黏著力，實施例1至實施例12、及比較例1至比較例3中的任一者皆為0.1N/mm以上。實施例6的結果略低，為0.24N/mm，但是由於為0.1N/mm以上，因此在使用上並無特別問題。 The adhesion between the lens surface and the coating portion of the convex lens-like lens sheet is 0.1 N / mm or more in any of Examples 1 to 12 and Comparative Examples 1 to 3. The result of Example 6 was slightly lower and was 0.24 N / mm, but since it was 0.1 N / mm or more, there was no particular problem in use.

在下文中，繪示經確認由於凸鏡狀透鏡薄片積層體製造的壓合加工條件所引起影響的結果，作為參考例。 In the following, the results confirmed as the influence of the lamination processing conditions for the production of the lenticular lens sheet laminate are shown as reference examples.

在實施例1(在下文中，則作為A)中，變更壓製溫度、壓製時間、壓製壓力，獲得凸鏡狀透鏡薄片積層體，評估此凸鏡狀透鏡薄片積層體的視認性與平滑性。 In Example 1 (hereinafter, referred to as A), the pressing temperature, pressing time, and pressing pressure were changed to obtain a convex lens-like lens sheet laminate, and the visibility and smoothness of this convex lens-like lens sheet laminate were evaluated.

在實施例2(在下文中，則作為B)中，變更壓製溫度、壓製時間、壓製壓力，獲得凸鏡狀透鏡薄片積層體，評估此凸鏡狀透鏡薄片積層體的視認性與平滑性。 In Example 2 (hereinafter, referred to as B), the pressing temperature, pressing time, and pressing pressure were changed to obtain a convex lens-like lens sheet laminate, and the visibility and smoothness of this convex lens-like lens sheet laminate were evaluated.

在實施例5(在下文中，則作為E)中，變更壓製溫度、壓製時間、壓製壓力，獲得凸鏡狀透鏡薄片積層體，評估此凸鏡狀透鏡薄片積層體的視認性與平滑性。 In Example 5 (hereinafter, referred to as E), the pressing temperature, pressing time, and pressing pressure were changed to obtain a convex lens-like lens sheet laminate, and the visibility and smoothness of this convex lens-like lens sheet laminate were evaluated.

Claims (5)

一種凸鏡狀透鏡薄片積層體，由凸鏡狀透鏡薄片、被覆該凸鏡狀透鏡薄片的透鏡表面之被覆材料、及用於黏著該凸鏡狀透鏡薄片與該被覆材料之黏著劑所構成，該凸鏡狀透鏡薄片積層體的特徵在於：該被覆材料的表面形成有凹凸，從由該被覆材料黏著後的凸鏡狀透鏡、被覆材料及黏著劑中的至少兩者所構成空隙的最低部直至最高部為止的距離H2，相對於從該凸鏡狀透鏡薄片的透鏡表面最低部直至最高部為止的距離H1之比率(H2/H1)為75%以上，由前述被覆材料與前述黏著劑所構成之凸鏡狀透鏡薄片積層體被覆部的平行光線透射率為30%以上。A lenticular lens sheet laminate is composed of a lenticular lens sheet, a covering material covering the lens surface of the lenticular lens sheet, and an adhesive for adhering the lenticular lens sheet and the covering material. The convex lenticular lens sheet laminate is characterized in that unevenness is formed on the surface of the covering material, and the lowest part of the gap is formed by at least two of the convex lens, the covering material, and the adhesive adhered by the covering material. until the distance to the highest portions H 2, with respect to the lens surface of the convex lens shape of the lens sheet lowest portion until the highest portion of the distance H 1 of the ratio (H 2 / H 1) more than 75% by the coating material and The parallel light transmittance of the covering portion of the convex lens-like lens sheet laminate formed by the aforementioned adhesive is 30% or more. 如請求項1所述之凸鏡狀透鏡薄片積層體，其中，前述凸鏡狀透鏡薄片的透鏡表面與前述被覆部是全面黏著，其黏著力為0.1N/mm以上。The convex lenticular lens sheet laminate according to claim 1, wherein the lens surface of the convex lenticular lens sheet and the covering portion are fully adhered, and the adhesive force thereof is 0.1 N / mm or more. 一種凸鏡狀透鏡薄片積層體，由凸鏡狀透鏡薄片、被覆該凸鏡狀透鏡薄片的透鏡表面之被覆材料、及用於黏著該凸鏡狀透鏡薄片與該被覆材料之黏著劑所構成，該凸鏡狀透鏡薄片積層體的特徵在於：具有被覆材料對該凸鏡狀透鏡薄片的黏著強度相對不同的區域，在弱黏著域中，從由該被覆材料黏著後的凸鏡狀透鏡、被覆材料及黏著劑中的至少兩者所構成空隙的最低部直至最高部為止的距離H2，相對於從該凸鏡狀透鏡薄片的透鏡表面最低部直至最高部為止的距離H1之比率(H2/H1)為75%以上，由前述被覆材料與前述黏著劑所構成之凸鏡狀透鏡薄片積層體被覆部的平行光線透射率為30%以上。A lenticular lens sheet laminate is composed of a lenticular lens sheet, a covering material covering the lens surface of the lenticular lens sheet, and an adhesive for adhering the lenticular lens sheet and the covering material. The convex lenticular lens sheet laminate is characterized in that it has a region where the coating material has a relatively different adhesive strength to the convex lenticular lens sheet, and in a weak adhesion region, from the convex lenticular lens and the cover after being adhered by the covering material. until the lowest portion of the highest portion of the distance H 2, with respect to the lens until the distance from the lens surface of the convex mirror-like sheet until the lowest portion of the top portion of the ratio H 1 (H adhesive material and composed of at least two voids 2 / H 1 ) is 75% or more, and the parallel light transmittance of the covering portion of the convex lens-like lens sheet laminate composed of the coating material and the adhesive is 30% or more. 如請求項3所述之凸鏡狀透鏡薄片積層體，其中，至少前述凸鏡狀透鏡薄片的透鏡表面與前述被覆部的強黏著域的黏著力為0.3N/mm以上。The convex lenticular lens sheet laminate according to claim 3, wherein at least the adhesive force between the lens surface of the convex lenticular lens sheet and the strong adhesion region of the covering portion is 0.3 N / mm or more. 如請求項3所述之凸鏡狀透鏡薄片積層體，其中，在進行黏著前述凸鏡狀透鏡薄片的透鏡表面與前述被覆部時，在弱黏著域並未具有黏著層。The convex lenticular lens sheet laminate according to claim 3, wherein when the lens surface of the convex lenticular lens sheet and the covering portion are adhered, there is no adhesive layer in the weak adhesion region.
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