WO2006109880A1 - 印刷像が設置されている再帰反射シート - Google Patents
印刷像が設置されている再帰反射シート Download PDFInfo
- Publication number
- WO2006109880A1 WO2006109880A1 PCT/JP2006/307999 JP2006307999W WO2006109880A1 WO 2006109880 A1 WO2006109880 A1 WO 2006109880A1 JP 2006307999 W JP2006307999 W JP 2006307999W WO 2006109880 A1 WO2006109880 A1 WO 2006109880A1
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- WIPO (PCT)
- Prior art keywords
- sheet
- retroreflective sheet
- retroreflective
- printed image
- layer
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/126—Reflex reflectors including curved refracting surface
- G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix
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- 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
-
- 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
- G02B30/40—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images giving the observer of a single two-dimensional [2D] image a perception of depth
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/126—Reflex reflectors including curved refracting surface
- G02B5/13—Reflex reflectors including curved refracting surface plural curved refracting elements forming part of a unitary body
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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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
- G09F3/0292—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time tamper indicating labels
Definitions
- the present invention relates to the prevention of counterfeiting of signs, license plates, and the like using a retroreflective sheet by using a virtual image by making the virtual image appear on the retroreflective sheet using an optical illusion. .
- the retroreflective sheet is composed of at least a retroreflective sheet provided with a printed image and an optical element array sheet in which a large number of optical elements having light transmission properties are regularly arranged at least at a fixed position.
- a retroreflective sheet that expresses a variable image that changes depending on the relative positions of the optical element array sheet and the retroreflective sheet, or the optical element
- the present invention relates to a retroreflective sheet characterized in that an array sheet is laminated on top of the retroreflective sheet and expresses a variable image that varies depending on the relative position of the optical element array sheet and the retroreflective sheet.
- the printed image includes at least one type of latent image, and a lenticular lens sheet is used as the optical element array sheet, and the retroreflective sheet is provided.
- the latent image is a pattern that is used for the creation of a stereoscopic image and is made by halftone printing on the basis of the plate making by image-decomposing the image at the same pitch as the lens pitch of the lenticular lens.
- the present invention relates to a retroreflective sheet on which a printed image is set.
- a convex lens array sheet is used as the optical element array sheet, and the pattern provided on the retroreflective sheet is halftone printing, and the number of lines (c) of the halftone printing portion and the convex lens Number of array sheets (d) force
- B is related to the retroreflective sheet on which a printed image having the relationship of is a positive numerical value in the range of 5 to 1.5.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-329355
- a jigsaw puzzle piece is formed with a lenticular lens having a thickness of 0.2 to 3. Omm and a lens pitch of 20 to 150 line inches.
- a three-dimensional / variable printing jigsaw puzzle and its manufacturing method are disclosed in which a three-dimensional / variable image is formed by fitting the image to the surface of a mount case on which a picture image decomposed according to the lens pitch of the lenticular lens is formed. Has been.
- Patent Document 1 a jigsaw puzzle piece is formed on a dod lens sheet, and the piece is formed on the surface of a mount case on which a pattern provided with a halftone dot printing unit is formed.
- This is a jigsaw puzzle that fits into a 3D image and forms a variable image.
- a three-dimensional variable printing jigsaw puzzle characterized by having the following relationship and a method for manufacturing the same are disclosed.
- Patent Document 1 there is no description in Patent Document 1 regarding providing a stereoscopic image on a retroreflective sheet that retroreflects light, and the jigsaw puzzle of Patent Document 2 has a high visual effect and design, and a sense of achievement achieved when combined. Although it is stated that satisfaction is obtained, entertainment is enhanced, and the combined jigsaw puzzle has a high decorative effect, it is not described that the virtual image is used for preventing forgery.
- Patent Document 2 discloses a hemisphere on the surface of a transparent substrate. Or arcuate plano-convex lens-shaped condensing elements are printed in a regular state at a constant fine pitch, and the back surface of the transparent substrate has the same shape as the plano-convex lens-shaped condensing elements, or is arranged in the same shape. Are printed with the crossing angle shifted with respect to the plano-convex lens condensing element on the surface, or the same shape as the plano-convex lens condensing element on the transparent substrate and a separate substrate. There is disclosed a decorative body with a dot drawing pattern using a moire phenomenon in which colored pixels having the same arrangement in the shape are printed and the substrates are bonded to each other with the crossing angle shifted.
- Patent Document 2 does not describe provision of a stereoscopic image on a retroreflective sheet that retroreflects light, and the decorative body of Patent Document 2 is used with interest because it is viewed with interest. Although it is described that it can be done, it is not described that the virtual image is used to prevent forgery.
- a retroreflective sheet that reflects incident light toward a light source is well known, and the retroreflective sheet utilizes signs of signs such as road signs and road signs.
- signs of signs such as road signs and road signs.
- Widely used in fields such as license plates for vehicles such as automobiles and motorcycles, safety materials such as clothing and lifesaving items, markings for signboards, various authentication stickers and reflectors, etc.
- the use of seats in various license plates and certified stickers has increased.
- reflection sheets internal total reflection type cube corner retroreflective sheet, specular reflection type cube corner retroreflective sheet, capsule lens type retroreflective sheet, encapsulated lens type retroreflective sheet, and open lesbian type retroreflective sheet are well known. ing.
- the internal total reflection type cube corner retroreflective sheet is disclosed in Schulz US Pat. No. 3,4 1 7, 9 59 (Patent Document 3) Mimura, Japanese Patent Application Laid-Open No. 2 0 0 1-0 2 6 4 5 2 ( Patent Document 4, corresponding US Pat. Nos. 6,318,866) and the like.
- specular reflection type cube corner retroreflective sheets include Roland's Japanese Patent Publication No. 8-510415 (Patent Document 5, corresponding US Pat. No. 5,376,431), Mimura et al. WOO 1/057560 ( Patent Document 6 and corresponding US Pat. No. 6,811.7,724)).
- capsule lens type retroreflective sheets examples include Mackenzie's Japanese Patent Publication No. 40-007870 (Patent Document 7, corresponding US Pat. No. 3,190,178), and Macgrass' Japanese Patent Publication No. 52-110592. (Patent Document 8, corresponding US Pat. No. 4,025,159) and Berry et al., Japanese Patent Laid-Open No. 62-121043 (Patent Document 9, corresponding US Pat. No. 5,064,272) Etc.) and the like.
- Patent Document 10 Japanese Patent Application Laid-Open No. 59-07 1 848 (Patent Document 10, corresponding US Pat. No. 4,721,694 and US Pat. No. 4,725,494) No.).
- Patent Document 1 Japanese Unexamined Patent Application Publication No. 2004-329355
- Patent Document 2 Japanese Patent Laid-Open No. 10-035083
- Patent Document 3 US Pat. No. 3, 41 7,959
- Patent Document 4 Japanese Patent Application Laid-Open No. 2001-026452
- Patent Document 5 Japanese National Publication No. 8-51041-5
- Patent Document 6 International Publication WO 01 No 057560
- Patent Document 7 Japanese Patent Publication No. 40-007870
- Patent Document 8 JP-A-52-110592
- Patent Document 9 Japanese Patent Application Laid-Open No. 6 2-1 2 1 0 4 3
- Patent Document 1 Japanese Patent Application Laid-Open No. 5-9-071 8 4 8 Disclosure of Invention
- the inventors of the present invention have made a thorough study on providing a stereoscopic image on a retroreflective sheet that retroreflects light and using the stereoscopic image for preventing counterfeiting.
- a lenticular lens sheet is used as the optical element array sheet, and the latent image provided on the retroreflective sheet is obtained by image decomposition of a stereoscopic image original with the same number of lines as the lens pitch of the lenticular lens. It is possible to provide a retroreflective sheet on which printing is performed, and a printed image characterized by a pattern printed based on the plate making is made.
- a convex lens array sheet is used as the optical element array sheet, and the latent image provided on the retroreflective sheet is formed by halftone printing.
- Number of lines (c) and number of lines of convex lens array ⁇ (d) force c BX d
- a retroreflective sheet on which a printed image having the following relationship is installed can be provided.
- the latent image is visually recognized as normal printing. Therefore, it is difficult to forge the latent image.
- a retroreflective sheet having such a latent image for example, a vehicle pick-up plate using such a retroreflective sheet is difficult to forge, and an anti-counterfeit effect can be obtained.
- Figure 1 is a cross-sectional view of a capsule-type triangular pyramidal cube corner retroreflective sheet.
- Fig. 2 is a cross-sectional view of a specular reflection type triangular pyramid cube corner retroreflective sheet.
- Fig. 3 is a cross-sectional view of a capsule lens type retroreflective sheet.
- Fig. 4 is a cross-sectional view of an encapsulated lens type retroreflective sheet. Explanation of symbols
- retroreflective sheet used in the present invention a known one can be used. Internal total reflection type cube corner retroreflective sheet, specular reflection type cube corner retroreflective sheet, capsule lens type retroreflective sheet, encapsulated lens type retroreflective sheet An open lens type retroreflective sheet or the like can be suitably used.
- the internal total reflection type cube corner retroreflective sheet is disclosed in, for example, Schulz, US Patent No. 3, 4 1 7, 9 59 (Patent Document 3), Mimura, JP 2 0 0 1-0 2 6 4 5 No. 2 (Patent Document 4, corresponding US Pat. No. 6,3 1 8, 8 6 6) and the like, and such a retroreflective sheet can be suitably used in the present invention. here, It replaces with description by quotation of a gazette.
- specular reflection type cube corner retroreflective sheet for example, Roland's Special Publication No. 8-5 10 04 15 (Patent Document 5, corresponding US Patent No. 5, 3 76, 4 31) Mimura et al., WOO 1/0 5 7 560 (Patent Document 6, Corresponding US Pat. No. 6, 8 1 7,724), and the like.
- Such a retroreflective sheet is used in the present invention. It can be used suitably. Here, it replaces the description by quoting the gazette.
- capsule lens type retroreflective sheets examples include, for example, Mackenzie's Japanese Patent Publication No. 40-00 78 70 (Patent Document 7, corresponding US Pat. No. 3, 1 90, 1 78 8), Japanese Patent Application Laid-Open No. Sho 5 2- 1 1 0 5 9 2 (Patent Document 8, corresponding US Pat. No. 4.002 5, 1 59) and Bailey et al. Gazette (Patent Document 9, Corresponding US Pat. No. 5,064, 2 72) and the like, and such a retroreflective sheet can be suitably used in the present invention. In this case, it is replaced with the description in the citation of the gazette.
- Examples of the encapsulated lens type retroreflective sheet include, for example, Japanese Patent Application Laid-Open No. 599-1848 (Patent Document 10; corresponding US Pat. No. 4, 7 2 1, 6 94 specification and US Pat. Patent No. 4, 7 2 5, 494), and such a retroreflective sheet can be suitably used in the present invention. Here, it replaces with description by quotation of a gazette.
- the manufacturing method of the lenticular lens used in the present invention is not particularly limited as long as it has a thickness of 0.2 to 3. Omm and a lens pitch of 20 to 150 lines no inch. Can be created.
- the relative positional relationship between the protrusion on the surface and the printed image provided on the retroreflective sheet may change.
- the thickness is preferably 0.2 to 3.0 mm.
- the material may be transparent so long as it transmits light.
- general-purpose synthetic resin sheets such as polyethylene, polypropylene, polyester, nylon, urethane, polyvinyl chloride, and acrylic are used. From the viewpoint of flexibility, an acrylic sheet is preferably used, and from the viewpoint of flexibility, a soft vinyl chloride sheet is preferably used. By pressing such a synthetic resin sheet using, for example, an embossing roll, a lenticular lens sheet suitably used in the present invention can be obtained.
- the regular concave-convex pattern is printed by silk screen printing so that the concave part has a smooth part with a width of 1 to 50 ⁇ . It is preferable to form with.
- the transparent sheet material used in this case includes polyvinyl chloride, polycarbonate, polyester, acrylic resin, polystyrene, polypropylene, polyethylene, ABS resin, biodegradable resin, transparent or translucent synthetic paper, etc. Is preferred.
- the regular concavo-convex pattern is for forming a lenticular lens layer on the surface of the transparent sheet material.
- the convex surface portion is a normal convex arc surface, whereas the concave surface portion has 1 on the bottom surface.
- the ink used for the silk screen is not particularly limited as long as it has high transparency and can form a concavo-convex pattern without processing such as embossing.
- braille ink can be suitably used.
- Commercially available products include UVPOT-5 0 2 0 9 Braille Clear made by Teikoku Inki Co., Ltd. The
- Computer software is available on the market for image decomposition of a 3D image document with the same number of lines as the lens pitch of the lenticular lens sheet. It is preferable to print with a halftone dot density, such as direct printing such as oiliness, UV offset printing, silk printing, daravia printing, flexographic printing, etc. by means such as on-demand printing, or The printing method can be used to print on transfer paper in advance and transfer it.
- a halftone dot density such as direct printing such as oiliness, UV offset printing, silk printing, daravia printing, flexographic printing, etc.
- the pattern with halftone dots printed appears to be a single color solid print, it is created by combining parts with different numbers of halftone lines, and if a convex lens array sheet is joined to the pattern, The halftone dots with different sizes can give different stereoscopic sensations.
- the pattern is multicolored printing of two or more colors, and one or more of them is halftone printing, for example, it is a multicolored print of five colors, of which three colors are halftone printed, and the remaining two colors
- the flat printing part constituting the two-color pattern appears to be flat
- the halftone dot printing part constituting the three-color pattern has a three-dimensional depth. It becomes a visual image.
- a stereoscopic image appears when c is not equal to d. Outside of the above range, the stereoscopic image does not appear or is very blurry and does not become visually interesting.
- the intersection angle (0) of the array pattern of the convex lens array sheet and the array pattern of the halftone dot printing is 0 degree ⁇ ⁇ 45 degrees, By doing so, a stereoscopic image can be expressed.
- the optical element array sheet when the optical element array sheet is bonded to the printed image of the retroreflective sheet, the optical element array sheet may be bonded so that the optical element of the optical element array sheet faces upward or downward. A stereoscopic image can be obtained.
- the retroreflective sheet of the present invention will be described in more detail.
- the retroreflective sheet on which the printed image is installed in the present invention includes an internal total reflection type cube corner retroreflective sheet, a specular reflection type cube corner retroreflective sheet, a capsule lens type retroreflective sheet, an encapsulated lens type retroreflective sheet, an open A lens-type retroreflective sheet or the like can be used.
- FIG. 1 is a cross-sectional view of a triangular pyramid cube corner retroreflective sheet.
- (4) is a reflective element layer in which the triangular pyramidal reflective elements of the present invention are arranged in a close-packed manner, (3) is a holding layer that holds the reflective elements, and (4 0) Incident direction.
- the reflective element layer (4) and the holder layer (3) are usually integrated (5), but separate layers may be laminated. Encapsulation to prevent moisture from entering the back surface of the surface protective layer (1), printing layer (2), and reflective element layer (4) according to the intended use and usage environment of the retroreflective sheet in the present invention
- a binder layer (7) for achieving a sealing structure, a support layer (8) for supporting the binder layer (7), and the retroreflective sheet are used to adhere to other structures.
- An adhesive layer (9) and a release substrate layer (10) can be provided.
- the printed layer (2) is usually placed between the surface protective layer (1) and the carrier layer (3), or on the surface protective layer (1) or on the reflective surface of the reflective element layer (4). If there are two or more surface protective layers (1), they can be installed between the surface protective layers.
- the latent image may be provided in the same layer as the print layer, or may be formed in a layer different from the print layer among the layers forming the print layer, but the front or back surface of the surface protective layer ( It is preferable to form the light incident side on the front surface in order to obtain a clearer stereoscopic image, and it is more preferable to provide the back surface from the security surface.
- the printing layer (2) can usually be installed by means such as gravure printing, screen printing, offset printing, flexographic printing, ink jet printing and laser printing.
- the halftone dot printing that forms the latent image can be installed by means of gravure printing, screen printing, offset printing, flexographic printing, ink jet printing, and laser printing.
- the material constituting the reflective element layer (4) and the holder layer (3) is not particularly limited as long as it satisfies the flexibility that is one object of the present invention. Those having transparency and uniformity are preferred.
- Examples of materials that can be used for the reflective element layer (4) in the present invention include polycarbonate.
- Examples thereof include nate resin, chlorinated resin, (meth) acrylic resin, epoxy resin, styrene resin, polyester resin, fluororesin, polyolefin resin such as polyethylene resin and polypropylene resin, cellulose resin, and urethane resin.
- an ultraviolet absorber, a light stabilizer, an antioxidant and the like can be used alone or in combination.
- various organic pigments, inorganic pigments, fluorescent pigments, dyes and fluorescent dyes can be contained as colorants.
- the same resin as that used for the reflective element layer (4) can be used for the surface protective layer (1), but in particular, a vinyl chloride resin excellent in weather resistance, solvent resistance, printability, etc., (meth) acrylic Resins are preferred.
- an ultraviolet absorber In the surface protective layer (1), an ultraviolet absorber, a light stabilizer, an antioxidant and the like can be used alone or in combination for the purpose of improving the weather resistance.
- various organic pigments, inorganic pigments, fluorescent pigments, dyes and fluorescent dyes can be contained as colorants.
- the ink for the printing layer (2) includes, in addition to the resin component and the colorant, a plasticizer, an antifoaming agent, a leveling agent, an ultraviolet absorber, a light stabilizer, a heat stabilizer, and a crosslink as necessary.
- a plasticizer in addition to the resin component and the colorant, a plasticizer, an antifoaming agent, a leveling agent, an ultraviolet absorber, a light stabilizer, a heat stabilizer, and a crosslink as necessary.
- Various additives such as an agent may be blended, and a solvent may be blended for adjusting the viscosity.
- the resin component used in the ink is not particularly limited, but is excellent in melamine such as dispersibility and stability of the colorant, solubility in solvents, weather resistance, printability, and adhesion to a film.
- a resin, an epoxy resin, a urethane resin, a bull resin, a polyester resin, an alkyd tree, etc. are preferable, and these can be used alone or in combination of two or more.
- the reflective element layer (4) is generally provided with an air layer (6) on the back of the triangular pyramid cube corner retroreflective element in order to increase the critical angle that satisfies the total internal reflection condition.
- the reflective element layer (4) and the support layer (8) are preferably hermetically sealed with a binder layer (7) in order to prevent problems such as a decrease in the critical angle due to intrusion of moisture under operating conditions.
- Examples of the resin used for the bonding layer (7) include (meth) acrylic resin, polyester resin, alkyd resin, and epoxy resin.
- As the bonding method a known heat-fusible resin bonding method or thermosetting resin bonding method is used. An ultraviolet curable resin bonding method, an electron beam curable resin bonding method, or the like can be appropriately employed.
- the binder layer (7) used in the present invention can be applied over the entire surface of the support layer (8), or can be selectively installed by a printing method or the like at the junction with the retroreflective element layer (4). Is possible.
- Examples of the material that constitutes the support layer (8) include the resin constituting the retroreflective element layer (4), the resin that can be formed into a general film, fiber, cloth, and metal foil or plate such as stainless steel or aluminum. Or it can be used in combination.
- An adhesive layer (9) used for attaching the retroreflective sheet of the present invention to a metal plate, a wooden plate, a glass plate, a plastic plate, etc., and a release substrate layer (10) for the adhesive layer (9) are: A known one can be selected as appropriate. As the adhesive, a pressure sensitive adhesive, a heat sensitive adhesive, a crosslinkable adhesive, and the like can be appropriately selected. Pressure sensitive adhesives include butyl acrylate, 2-ethyl hexyl acrylate, isooctyl acrylate, nonyl acrylate, etc.
- Polyacrylic acid ester pressure-sensitive adhesives obtained by copolymerization with nil, silicone resin-based pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, and the like can be used.
- silicone resin-based pressure-sensitive adhesives silicone resin-based pressure-sensitive adhesives
- rubber-based pressure-sensitive adhesives and the like
- heat-sensitive adhesive acrylic resin, polyester resin, epoxy resin, or the like can be used.
- the surface protective layer (1), printed layer (2), carrier layer (3), reflective element layer (4), (3) and (4) of the specular reflection type triangular pyramid cube corner retroreflective sheet For the adhesive layer (5), the adhesive layer (9), and the release substrate layer (10), the same triangular pyramid cube corner retroreflective sheet can be used.
- the reflective mirror layer is a metal specular reflection layer.
- (1 1) is provided, it is preferably provided on the surface or the back surface of the surface layer in order to improve the visibility of the pattern.
- the latent image may be provided in the same layer as the print layer, or may be formed in a layer different from the print layer among the layers forming the print layer described above.
- the side is referred to as the front surface) in order to obtain a clearer stereoscopic image, and more preferably from the security surface to the back surface.
- the printing layer (2) can adopt the printing method used for the above-mentioned triangular pyramid retroreflective sheet, and can be installed by means such as gravure printing, screen printing, offset printing, flexographic printing, ink jet printing, and laser printing. .
- the printing method used in the above-mentioned triangular pyramid retroreflective sheeting can be adopted, such as gravure printing, screen printing, offset printing, flexographic printing, ink jet printing, and laser one printing. It can be installed by means. .
- the ink for the printing layer (2) includes, in addition to the resin component and the colorant, a plasticizer, an antifoaming agent, a leveling agent, an ultraviolet absorber, a light stabilizer, a heat stabilizer, and a crosslink as necessary.
- Various additives such as an agent may be blended, and a solvent may be blended for adjusting the viscosity.
- the resin component used in the ink is not particularly limited, but is excellent in melamine such as dispersibility and stability of the colorant, solubility in solvents, weather resistance, printability, and adhesion to a film.
- Resins, epoxy resins, urethane resins, vinyl resins, polyester resins, alkyd resins, and the like are preferred, and these may be used alone or in combination of two or more.
- specular reflection layer (1 1) On the surface of the reflective element layer (4) of the specular reflection type cube corner retroreflective sheet, a metal specular reflection layer (1 1) is installed, and an adhesive layer (9) is also used as the specular reflection layer (1 1 ) Is directly contacted and laminated.
- the specular reflective triangular pyramidal cube corner retroreflective sheet in this embodiment does not require an air layer to retroreflect on the specular reflection principle, and therefore does not require a binder layer and a support layer.
- the specular reflection cube-corner retroreflective sheet of the present invention is made of a metal such as aluminum, copper, silver, or nickel on the surface of the reflective element layer (4) using means such as vacuum deposition, chemical plating, and sputtering.
- a specular reflection layer (11) can be provided.
- the vacuum deposition method using aluminum can lower the deposition temperature, so that the thermal deformation of the retroreflective element (4) in the deposition process is minimized.
- the resulting specular reflection layer (11) has a bright color tone, which is preferable.
- the aluminum mirror reflection layer (1 1) continuous deposition apparatus includes a vacuum degree of 7 X 10 one 4 ⁇ 9 X 10 vacuum vessel capable of maintaining the order of one 4 mmHg, disposed therein a substrate
- a sheet unwinding device that unwinds a prism original sheet made of a surface protective layer laminated on the light incident side surface, a sheet unwinding device that scrapes off the deposited prism original sheet, and a space between them. It consists of a heating device that can melt aluminum in an graphite heater with an electric heater. The purity is 99.99 weight in the graphite crucible.
- a mirror reflection layer (11) can be deposited on the surface of the retroreflective element by using an atom with a thickness of, for example, 800 to 2000 angstroms.
- FIG. 3 is an embodiment of a capsule lens type retroreflective sheet used in the present invention.
- Fig. 3 it is a microphone-lens type reflection element having a specular reflection layer (27) in a part of a glass microsphere (23), and a large number of retroreflection elements (23) are arranged in a close-packed state.
- the retroreflective element layer is formed by being embedded and supported in the binder layer (24) so that the specular reflection layer (27) side of the glass microsphere is embedded.
- the retroreflective element layer is formed by the retroreflective element (23), the binder layer (24), the surface protective layer (21), and a coupling part (25) that couples these layers in a continuous network.
- An air layer (28) is enclosed in the capsule.
- the retroreflective property can be exhibited only by holding the air layer (28) on the surface of the reflective element (23) as described above.
- the coupling part (25) holds the air layer (28) and prevents water and the like from entering the surface of the retroreflective element layer. If the surface of the reflective element layer is covered with water or the like, the light incident on the retroreflective element (23) will not be focused on the specular reflective layer (27) of the element because of the refractive index of light. Sexuality is impaired.
- Retroreflective element (23) in capsule lens type retroreflective sheet and reflector Capsules containing a child layer and an air layer (28) are generally formed as follows: (ii) Disperse glass microspheres as uniformly as possible on a temporary fixing sheet having a heat softening layer such as polyethylene on the surface. Then, the lower part of the microsphere is embedded in the thermal softening layer by heating,
- the retroreflective sheet can be used by the observer depending on the purpose of use and the usage environment.
- the printed layer and the latent image can be provided on the front or back surface of the surface layer or the binder layer.
- the printed layer and the latent image are provided on the front surface or the back surface of the surface layer. Is preferred.
- the latent image may be provided in the same layer as the printed layer, or it may be formed in a layer different from the printed layer from the middle of the layer forming the printed layer.
- Forming on the back surface is preferable in order to obtain a clearer stereoscopic image, and it is more preferable to provide the back surface from the security surface.
- the printing layer (2) can adopt the printing method used for the above-mentioned triangular pyramid retroreflective sheet, and should be installed by means such as Daravia printing, screen printing, offset printing, flexographic printing, ink jet printing, and laser printing. Can do.
- the halftone dot printing that forms the latent image can adopt the printing method used in the above-mentioned triangular pyramid retroreflective sheet, and is installed by means such as gravure printing, screen printing, offset printing, flexographic printing, inkjet printing, and laser printing. be able to.
- the ink for the printing layer (2) includes, in addition to the resin component and the colorant, a plasticizer, an antifoaming agent, a leveling agent, an ultraviolet absorber, a light stabilizer, a heat stabilizer, and a crosslink as necessary.
- a plasticizer in addition to the resin component and the colorant, a plasticizer, an antifoaming agent, a leveling agent, an ultraviolet absorber, a light stabilizer, a heat stabilizer, and a crosslink as necessary.
- Various additives such as an agent may be blended, and a solvent may be blended for adjusting the viscosity.
- the resin component used in the ink is not particularly limited, but dispersibility and stability of the colorant, solubility in solvents, weather resistance, printability, film Melamine resin, epoxy resin, urethane resin, vinyl resin, polyester resin, alkyd resin, etc., which are excellent in adhesiveness, etc. are preferable, and these can be used alone or in combination of two or more.
- the glass microspheres (2 3) used for forming the retroreflective element layer those made of glass having a particularly high refractive index are used.
- each layer of the capsule lens type retroreflective sheet the same materials as described above for the corresponding layers of the cube corner type retroreflective sheet can be used.
- the support layer (2 6) provided as necessary is usually made of a resin that is stronger and more flexible than the material used for the binder layer (2 4). If necessary, it can be crosslinked by known means, for example, using a isocyanate as a crosslinking agent, or by radiation crosslinking.
- the capsule lens type retroreflective sheet having the above-described configuration at least one layer closer to the incident light side (the side indicated by the arrow 40 in FIG. 3) than the sealed air layer (18), that is, in FIG.
- the surface protective layer (1) and the Z or printed layer are blended together with an ultraviolet absorber and / or a light stabilizer, thereby providing a capsule having excellent weather resistance.
- a lens-type retroreflective sheet can be obtained.
- FIG. 4 is a sectional view thereof.
- a surface layer (3 1) made of a transparent resin that supports a large number of transparent microspheres (3 3), such as transparent microglass spheres, and a bead binding layer (3 4) along the curved surface of the layer of transparent microspheres (3 3) protruding from the bead-binding layer (3 4)
- a specular reflection layer (3 5) formed at a constant thickness so that the specular reflection layer (3 6) formed on the surface comes to the optical focus position of the transparent microsphere (3 3). It will be.
- the high refractive index transparent microsphere (3 3), the focus adjustment layer (3 5) and the specular reflection layer (3 6) are almost arranged in a positional relationship that optically satisfies the retroreflection condition of light.
- a lens-type retroreflective element is formed.
- the printed layer and the latent image are provided on the surface or the back surface of the surface layer in order to improve the visibility of the force pattern that can be provided on the surface or the back surface of the surface layer or the binder layer. preferable.
- the latent image may be provided in the same layer as the printed layer, or may be formed in a layer different from the printed layer from the middle of the layer that forms the printed layer.
- the light incident side is referred to as the front surface
- the front surface is preferable in order to obtain a clearer stereoscopic image, and more preferably from the security surface to the back surface.
- the printing method used for the triangular pyramid retroreflective sheet can be used to form the printing layer (2), and it is installed by means such as gravure printing, screen printing, offset printing, flexographic printing, inkjet printing, and laser printing. be able to.
- the halftone dot printing that forms the latent image can adopt the printing method used in the above-mentioned triangular pyramid retroreflective sheeting, and is installed by means such as gravure printing, screen printing, offset printing, flexographic printing, ink jet printing, and laser printing. can do.
- the ink for the printing layer (2) includes, in addition to the resin component and the colorant, a plasticizer, an antifoaming agent, a leveling agent, an ultraviolet absorber, a light stabilizer, a heat stabilizer, and a crosslink as necessary.
- Various additives such as an agent may be blended, and a solvent may be blended for adjusting the viscosity.
- the resin component used in the ink is not particularly limited, but is excellent in melamine such as dispersibility and stability of the colorant, solubility in solvents, weather resistance, printability, and adhesion to the film. Resins, epoxy resins, urethane resins, bull resins, polyester resins, alkyd resins, and the like are preferable, and these may be used alone or in combination of two or more.
- the printed image or latent image is the same as the above-mentioned cube corner type retroreflective sheet or capsule lens type retroreflective sheet, the surface of the surface protective layer (3 1) (light incident side surface), the back side, or the retroreflective element. It can be provided on the surface of the layer, and the same colorant can be used.
- each layer of the encapsulated lens type retroreflective sheet As the material constituting each layer of the encapsulated lens type retroreflective sheet, the same materials as described above for the corresponding layers of the cube corner type retroreflective sheet can be used.
- the surface layer and the reflective layer are blended together with the ultraviolet absorber and / or the light stabilizer in the same manner as in the case of the cube corner type retroreflective sheet. Therefore, it is possible to obtain an encapsulated retroreflective sheet having excellent weather resistance.
- the retroreflective sheet of the present invention is composed of a retroreflective sheet provided with a printed image and an optical element array that has a large number of optical elements regularly arranged at least at certain positions.
- the optical element array and the retroreflective sheet exist separately, and the retroreflective sheet may be viewed through the optical element array sheet, or the optical element array sheet is laminated on the retroreflective sheet. Then, the image can be changed by rotating or moving the position relative to the retroreflective sheet.
- the retroreflective sheet of the present invention has a relative relationship between the optical element array sheet and the retroreflective sheet. It has a variable image that changes with different positions.
- the variable image may be a planar two-dimensional image or a three-dimensional three-dimensional image.
- the retroreflective sheet of the invention can be suitably used for a license plate.
- the license plate as used in the present invention has a structure in which a retroreflective sheet is laminated on a metal plate such as aluminum or steel plate, or a structure in which a light incident side of a reflective sheet is laminated on a transparent resin plate via an adhesive. is there.
- a police officer can attach an optical element array sheet to a license plate at the time of an inspection or the like to develop a standing image.
- the retroreflective sheet of the present invention can be suitably used for an authentication plate.
- an inspector can join an optical element array sheet to an authentication plate to develop a stereoscopic image.
- Example 1 A 0.8 mm thick polyester film is used as a transparent sheet material, and the surface side thereof is regularly spaced with a pitch of 80 inches and a smooth portion of the concave portion having a width of 5 ⁇ m.
- an ink for Braille (trade name UVPOT — 5 0 2 0 9 Braille Clear, manufactured by Teikoku Ink Co., Ltd.) with a concavo-convex pattern, a wrench quilla lens 1 was made by Synorek screen printing.
- Triangular pyramid cube corner retroreflective sheet (Nippon Carbide Industries Co., Ltd. crystal grade product name: 9 2 8 0 2) with 3D image manuscript set to 80 lines / inch pitch
- computer software lenticular display
- UV offset printing was performed based on the plate making after image decomposition using the product name Lenticular F ZX) manufactured by KIPMENT Co., Ltd., and a halftone printing image was obtained.
- Lenticular F ZX product name
- Example 2 A lenticular lens having a thickness of 0.47 mm and a lens pitch of 72 2 inches was manufactured by pressing, and a lenticular lens 1 was prepared. On the surface of the retroreflective sheet used in Example 1, OV offset printing was performed by on-demand printing with a dot density of 300 lines Z inches to obtain a printed image.
- Example 3 A halftone print image is printed on the surface of a capsule lens type retroreflective sheet (ULS grade product name F 8 1 2 manufactured by Nippon Carbide Industries Co., Ltd.) by offset printing of 120 to 140 lines. Obtained.
- a capsule lens type retroreflective sheet ULS grade product name F 8 1 2 manufactured by Nippon Carbide Industries Co., Ltd.
- Example 4 With the back side of the convex lens array sheet facing up, it was joined in the same manner as in Example 3 except that it was joined onto the printed image placed on the retroreflective sheet, resulting in a clear stereoscopic image. It was.
- Example 5 In the same manner as Example 3 except that the retroreflective sheet is an encapsulated lens type retroreflective sheet (license plate grade ELG product name 4 8 0 1 2 manufactured by Nippon Carbide Industries, Ltd.). A printed image was obtained.
- the retroreflective sheet is an encapsulated lens type retroreflective sheet (license plate grade ELG product name 4 8 0 1 2 manufactured by Nippon Carbide Industries, Ltd.). A printed image was obtained.
- Example 6 A printed image was obtained in the same manner as in Example 5 except that, in order to obtain a printed image on the retroreflective sheet, halftone dot printing was performed at 130 line inches. A stereoscopic image was not obtained even when the convex lens sheet was superimposed on the printed image placed on the retroreflective sheet in the same manner as in Example 3, but when the convex lens sheet was rotated on the printed image, The stereoscopic image changed according to the rotation, and some of the images looked clear. [Example 7] A printed image was obtained in the same manner as in Example 5 except that the number of lines for halftone printing to obtain a printed image was set to 300. Got.
- Example 3 when a convex lens sheet was bonded onto the printed image placed on the retroreflective sheet, a stereoscopic image was obtained, but it was not clear.
- Example 8 Polyethylene terephthalate film was used as a carrier film, and a polyester resin solution (trade name, Almatex HMP-90 S) manufactured by Mitsui Chemicals Co., Ltd. was added to 50 parts by weight of polyester resin manufactured by Mitsui Chemicals Co., Ltd. 10 parts by weight of a resin solution (trade name, Almatex P-1 10), 40 parts by weight of a polyester resin solution (trade name, Olester Q-203) manufactured by Mitsui Chemicals, Ltd., manufactured by Sanwa Chemical Co., Ltd. 1 part by weight of methylated melamine resin solution (trade name, Nikki Rack MS— 1 1), acrylic resin made by Mitsui Chemicals Co., Ltd.
- a polyester resin solution (trade name, Almatex HMP-90 S) manufactured by Mitsui Chemicals Co., Ltd. was added to 50 parts by weight of polyester resin manufactured by Mitsui Chemicals Co., Ltd. 10 parts by weight of a resin solution (trade name, Almatex P-1 10), 40 parts by weight of
- glass beads (trade name: UNIBEADS N-34S) manufactured by Union Bead Co., Ltd. were sprayed on the film 1 and then dried and cured.
- Nippon Polyurethane Industry Co., Ltd. isocyanate-based cross-linking agent (trade name, Coronate L) 1 part by weight
- the carrier film was peeled off to obtain a retroreflective sheet on which the printed image was internally printed.
- Example 9 On the surface of the retroreflective sheet used in Example 5, a printed image was obtained by offset multicolor printing at a line of 120 to 140. At this time, the three colors were halftone printing and the two colors were flat printing.
- Example 10 A printed image was obtained on the surface of the retroreflective sheet used in Example 1 by offset printing of lines 120 to 140.
- Example 1 1 When the convex lens array sheet used in Example 3 is bonded to the retroreflective sheet used in Example 6 so that the crossing angle is 15 °, a stereoscopic image always appears. A retroreflective sheet was obtained.
- Example 1 2 The adhesive layer created in Example 8 was attached to the back of the lenticular lens sheet used in Example 1, the release paper was peeled off, and the retroreflective sheet created in Example 8 was installed. When a retroreflective sheet was laminated on the printed image, a retroreflective sheet in which a stereoscopic image always appeared was obtained.
- Example 13 Using a 0.8 mm thick polyester film as the transparent sheet material, regular irregularities having a smooth portion of concave surface of 5 / xm width at a pitch of 80 lines / inch on the surface side thereof The pattern is printed on approximately half the area of the polyester film by silk screen printing using Braille ink (trade name UVPOT-5 0 2 0 9 Braille Clear made by Teikoku Ink Co., Ltd.). made.
- Braille ink trade name UVPOT-5 0 2 0 9 Braille Clear made by Teikoku Ink Co., Ltd.
- Example 14 A retroreflective sheet was prepared in the same manner as Example 13 except that in Example 13 the lenticular lens 3 was joined with the back side facing up. A clear stereoscopic image was obtained in the part with the lens, and the printed image was intact in the part without the lens.
- Example 15 The lenticular lens 1 produced in Example 2 and the side of the polyester film used in Example 1 were joined together to make a lenticular lens 1-4.
- a virtual image appears on the retroreflective sheet.
- the virtual image it is possible to provide a retroreflective sheet that is useful for preventing counterfeiting such as signs and license plates using the retroreflective sheet.
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- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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PL06731935T PL1879057T3 (pl) | 2005-04-11 | 2006-04-11 | Folia odblaskowa z nadrukowanym obrazem |
JP2007513043A JP4800302B2 (ja) | 2005-04-11 | 2006-04-11 | 印刷像が設置されている再帰反射シート |
US11/910,794 US8147075B2 (en) | 2005-04-11 | 2006-04-11 | Printed image-set retroreflective sheeting |
DE602006020712T DE602006020712D1 (de) | 2005-04-11 | 2006-04-11 | Rückreflektierende folie mit gedrucktem bildsatz |
EP06731935A EP1879057B1 (en) | 2005-04-11 | 2006-04-11 | Printed image-set retro-reflection sheet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005-113097 | 2005-04-11 | ||
JP2005113097 | 2005-04-11 |
Publications (1)
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WO2006109880A1 true WO2006109880A1 (ja) | 2006-10-19 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2006/307999 WO2006109880A1 (ja) | 2005-04-11 | 2006-04-11 | 印刷像が設置されている再帰反射シート |
Country Status (8)
Country | Link |
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US (1) | US8147075B2 (ja) |
EP (1) | EP1879057B1 (ja) |
JP (1) | JP4800302B2 (ja) |
CN (1) | CN100570413C (ja) |
DE (1) | DE602006020712D1 (ja) |
ES (1) | ES2359934T3 (ja) |
PL (1) | PL1879057T3 (ja) |
WO (1) | WO2006109880A1 (ja) |
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WO2011147079A1 (en) * | 2010-05-25 | 2011-12-01 | 3M Innovative Properties Company | Exposed lens retroreflective article |
JP2016505347A (ja) * | 2012-10-11 | 2016-02-25 | ユイチェン ファン | 立体印刷方法及びこれによって製作される装飾板とライトボックス |
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WO2011147079A1 (en) * | 2010-05-25 | 2011-12-01 | 3M Innovative Properties Company | Exposed lens retroreflective article |
US8851688B2 (en) | 2010-05-25 | 2014-10-07 | 3M Innovative Properties Company | Exposed lens retroreflective article |
US9234990B2 (en) | 2010-05-25 | 2016-01-12 | 3M Innovative Properties Company | Exposed lens retroreflective article |
JP2016505347A (ja) * | 2012-10-11 | 2016-02-25 | ユイチェン ファン | 立体印刷方法及びこれによって製作される装飾板とライトボックス |
JP2019066833A (ja) * | 2017-09-29 | 2019-04-25 | 日本カーバイド工業株式会社 | 画像表示装置 |
Also Published As
Publication number | Publication date |
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US20090097114A1 (en) | 2009-04-16 |
DE602006020712D1 (de) | 2011-04-28 |
JPWO2006109880A1 (ja) | 2008-11-20 |
EP1879057A1 (en) | 2008-01-16 |
US8147075B2 (en) | 2012-04-03 |
CN101194189A (zh) | 2008-06-04 |
EP1879057B1 (en) | 2011-03-16 |
CN100570413C (zh) | 2009-12-16 |
PL1879057T3 (pl) | 2011-08-31 |
EP1879057A4 (en) | 2008-06-25 |
ES2359934T3 (es) | 2011-05-30 |
JP4800302B2 (ja) | 2011-10-26 |
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