WO2005059605A1 - 再帰性反射シートとその再帰性反射シートに用いられるフィルム - Google Patents
再帰性反射シートとその再帰性反射シートに用いられるフィルム Download PDFInfo
- Publication number
- WO2005059605A1 WO2005059605A1 PCT/JP2004/018991 JP2004018991W WO2005059605A1 WO 2005059605 A1 WO2005059605 A1 WO 2005059605A1 JP 2004018991 W JP2004018991 W JP 2004018991W WO 2005059605 A1 WO2005059605 A1 WO 2005059605A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- truncated
- triangular pyramid
- longest
- pyramid
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/122—Reflex reflectors cube corner, trihedral or triple reflector type
- G02B5/124—Reflex reflectors cube corner, trihedral or triple reflector type plural reflecting elements forming part of a unitary plate or sheet
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/254—Polymeric or resinous material
Definitions
- Retroreflective sheet and film used for the retroreflective sheet are Description Retroreflective sheet and film used for the retroreflective sheet
- the present invention relates to a prism retroreflective sheet having a novel structure. More specifically, the present invention relates to a truncated triangular truncated prism retroreflective sheeting characterized by having a truncated triangular truncated prism having a novel structure as a reflective element layer, and a resin film constituting the same. . Background art
- Retroreflective sheets are used for signs such as road signs and construction signs, as well as safety materials such as license plates and rear-end collision prevention plates for vehicles such as automobiles and motorcycles, clothing and life-saving equipment.
- the triangular pyramid-shaped cube corner retroreflective sheet is less likely to scatter and reflect the reflected light at a wide angle than the glass bead type retroreflective sheet. Therefore, due to the narrow divergence angle of the retroreflected light, practically, for example, when the light emitted from the headlamp of a car is retroreflected by a traffic sign, the driver who is away from the optical axis of the traffic sign The inconvenience of being hard to reach the eyes is likely to occur. Such an inconvenience is caused by the angle formed by the axis (observation axis) connecting the incident axis of the light beam and the reflection point with the driver, especially when the distance between the car and the traffic sign is short (hereinafter referred to as the observation angle). ) Becomes larger (ie, the observation angle characteristics are inferior).
- a retroreflective sheet in which triangular pyramid-shaped reflecting elements of various shapes are provided on a thin sheet and a method for manufacturing such a sheet are described (US Patent No. 2,48,898). 1, 757 publication).
- a triangular pyramid-shaped reflective element the triangular pyramid-shaped reflective element with the vertex of the triangular pyramid positioned at the center of the base triangle and without the tilt of the optical axis, or the tilt of the optical axis whose vertex is not positioned at the center of the base triangle.
- An example of the triangular pyramid reflecting element is described, which describes that light is efficiently reflected to an approaching automobile.
- this method does not specifically disclose a very small triangular pyramid-shaped reflecting element, and does not exemplify what size and desirably the optical axis inclination of the triangular pyramid-shaped reflecting element has.
- a method for solving these problems a method has been exemplified in which the size and the optical axis inclination of a triangular pyramid-shaped reflecting element are specified to solve these problems (for example, Japanese Patent Application Laid-Open No. Hei 6-250006). And Japanese Patent Application Laid-Open No. 2000-265425).
- the improvement is still insufficient, and when both the angle of incidence and the observation angle are small, if the retroreflection coefficient is too large, the reflected light is too dazzling, and conversely signs and the like cannot be recognized. There is a problem that halation is easily caused and the driver is dazzled.
- the retroreflective efficiency (retroreflection coefficient) becomes smaller when the incident angle is smaller than the observation angle. I can't say.
- the retroreflective performance is extremely different between the portrait and landscape orientations, that is, the directional characteristics are poor, but specific technical disclosures to solve it are also available. There is no.
- a retroreflective sheet having a triangular pyramidal reflective element layer
- a retroreflective sheet is used to secure an air layer on the back surface of the triangular pyramid reflective element when joining with a backing film (backing sheet).
- backing sheet backing film
- the reflective element layer to which the convex support portions are bonded cannot satisfy the total internal reflection condition, and the triangular pyramidal retroreflective sheet has a problem that the retroreflectivity is reduced. .
- the retroreflective sheet made by these methods is not preferable because the tip of the triangular pyramid is very sharp, the tip rubs when the backing sheet is attached, the shape changes, and the retroreflectivity varies.
- the triangular pyramid rubs in the roll when the roll is rolled up after the prism is applied after the prism is applied, and the prism is destroyed. The burden on the environment. Disclosure of the invention
- An object of the present invention is to provide a retroreflective sheet and a film for a retroreflective sheet, which have an appropriate recursive property even at a small incident angle, do not cause halation, have good incident angle characteristics, and have good directional characteristics. .
- the present inventors have made intensive studies and have found that a retroreflective sheet using a triangular truncated pyramid having a specific shape as a reflecting element (microprism) has a reduced halation and is a retroreflective sheet excellent in incident angle characteristics and directional characteristics.
- the present inventors have found that the present invention exhibits the property and completed the present invention.
- the present invention relates to the following (1) to (10).
- a truncated pyramid-shaped prism retroreflective sheeting in which a truncated triangular pyramid-shaped reflecting element layer is arranged on one side in a close-packed manner, wherein the retroreflective sheeting satisfies the following conditions:
- the length of one side on the lower base of the triangular pyramid is 50 to 400 / xm, and the difference between the longest side and the shortest side is 200 ⁇ m or less,
- the length of the longest ridgeline in the frustum of the triangular pyramid is 30 to 400 ⁇ , and the difference between the length of the longest ridgeline and the shortest ridgeline among the three ridgelines is 100 ⁇ or less.
- the longest line that intersects the upper base has a length of 20 to 250; m,
- the angle between the sides of the frustum is 85-95 degrees.
- a film partially having the backing film and the reflective element layer is obtained by embossing.
- a triangle with a length of one side of 50 to 400 ⁇ m and a difference between the longest side and the shortest side of 200 ⁇ m or less is defined as a lower base, and a longest ridge line has a length of 30 to 400 ⁇ , A perpendicular element is drawn from the bottom surface, and the longest line that intersects the top surface has a length of 20 to 250 ⁇ , and the side-to-side angle is 85 to 95 degrees.
- the resin film is made of acrylic resin, polycarbonate resin, polystyrene Resin, polyester resin, polyethylene resin, polypropylene resin, polyvinyl chloride resin, polyarylate resin, polyurethane resin, epoxy resin, fluororesin and cellulose resin.
- the resin film is an ultraviolet absorber selected from benzotriazole, benzophenone, triazine, etc., a light stabilizer selected from hindered amine, etc., an antioxidant composed of phenol, phosphite, etc., montanic acid ester
- the resin film further contains organic dyes such as thioxanthene-based, coumarin-based, perylene-based, methine-based, benzopyran-based, thioindigo-based, and anthraquinone-based organic dyes, and azo-based and phthalocyanine-based organic pigments.
- organic dyes such as thioxanthene-based, coumarin-based, perylene-based, methine-based, benzopyran-based, thioindigo-based, and anthraquinone-based organic dyes, and azo-based and phthalocyanine-based organic pigments.
- Fig. 1 Shape and name of truncated triangular pyramid prism
- Fig. 2 Bird's-eye view of a truncated triangular pyramid retroreflective sheet
- Fig. 3 Configuration example of retroreflective sheet using truncated triangular prism
- FIG. 4 Configuration example of retroreflective sheet using parallel triangular truncated pyramid prism
- Fig. 5 Conceptual diagram of measurement method of retroreflection coefficient according to JISZ8714 1
- Fig. 6 Measurement method of retroreflection coefficient according to JISZ8714 Conceptual illustration of 2 sign explanation
- a have a 2, a 3: each side of the bottom surface triangle
- the retroreflective sheet of the present invention is a truncated triangular truncated prism retroreflective sheet in which a truncated triangular pyramid-shaped reflecting element layer is arranged on one surface in a close-packed manner.
- the shape of the microprism which is the reflecting element of the retroreflective sheet of the present invention, is a truncated triangular pyramid. In other words, the shape of the microprism is
- a triangular pyramid (hereinafter referred to as a virtual triangular pyramid) having three side surfaces (inclined surfaces) sharing the lower base are cut by a plane (upper base (c)), and the upper triangular pyramid (hereafter referred to as virtual).
- This is a polyhedron formed by removing the upper part of the triangular pyramid (sometimes referred to as the upper part of the triangular pyramid).
- halation can be reduced when both the incident angle and the observation angle are small.
- even when the backing film is adhered it is possible to prevent a decrease in retroreflection without impairing the total internal reflection condition of the microprism.
- waste can be reduced due to chipping of the microprism tip, and prism workability can be improved.
- the lower base (b) has a side length (a) of 50 to 400 ⁇ , preferably 60 to 300 / zm, and more preferably 100 to 250 / zm. It is a triangle having ⁇ and a difference between the longest side and the shortest side of 200 ⁇ m or less, preferably 150 ⁇ m or less, and more preferably 100 ⁇ m or less.
- the length (a) of one side of the triangle which is the lower base (b)
- the length (a) of one side of the triangle which is the lower base (b)
- the length exceeds 400 °
- Reflectivity tends to decrease.
- the difference between the longest side and the shortest side of the three sides of the triangle on the lower base (b) exceeds 200 ⁇ , that is, when the triangle is extremely elongated, the incident angle characteristics tend to decrease. is there.
- the lengths of the three sides are different from each other in terms of directional characteristics.
- the lengths of two sides of the three sides of the triangle on the lower base (b) are equal, that is, when the triangle on the lower base (b) is an isosceles triangle or an equilateral triangle, the directional characteristics tend to decrease.
- the length of the longest ridge line (d) is 30 to 400 / zm, preferably 50 to 30 ⁇ , more preferably 80 to 200 ⁇ .
- the difference between the longest ridge and the shortest ridge is 100 ⁇ m or less, preferably 90 ⁇ m or less, and more preferably 80 ⁇ m or less. It is.
- the incident angle characteristics and the retroreflectivity tend to decrease.
- the difference between the longest ridge line and the shortest ridge line among the three ridge lines in the virtual triangular pyramid exceeds 10 O jum, the incident angle characteristics and the retroreflectivity tend to decrease.
- the upper base (c) of the truncated triangular pyramid in the present invention is a plane that cuts out the upper part of the virtual triangular pyramid, and is a triangle connecting the intersections with the three ridges of the virtual triangular pyramid.
- a perpendicular is drawn from the lower base (b), and the upper base (c) is one of the three lines that intersect each intersection with the three ridges of the virtual triangular pyramid.
- the length of the long line (e) (hereinafter referred to as the longest distance (e) between the upper base (c) and the lower base (d)) is 20 to 250 ⁇ m, and preferably 50 to 2 ⁇ m.
- the thickness is preferably from 100 ⁇ m, more preferably from 70 to 150 ⁇ m.
- the retroreflectivity tends to decrease, and when it exceeds 250 ⁇ m, the incident angle characteristic becomes poor. Tends to decrease.
- the upper bottom surface (c) of the truncated triangular pyramid of the present invention is preferably parallel to the lower bottom surface (b). Since the upper base (c) of the truncated triangular pyramid is parallel to the lower base, frontal recursiveness is improved by specular reflection at the upper base (c) with respect to light rays from the front (light rays with small incident angles). Can be done. In addition, it is possible to prevent a decrease in retroreflection without deteriorating the total internal reflection condition of the microprism when bonding with the backing film. Further, the workability in performing the prism processing is also improved. However, the upper base (c) of the truncated triangular pyramid in the present invention may be slightly inclined with respect to the lower base (b).
- the triangle on the upper base (C) is similar to the triangle on the lower base (b).
- the area ratio between the triangle on the bottom (c) and the triangle on the bottom (b) may be proportional to the square of the ratio of the height of the top of the virtual pyramid to the assumed height from the vertex of the virtual pyramid.
- the longest distance (e) between the upper base (c) and the lower base (d) is the assumed height from the vertex of the virtual triangular pyramid. From this, the value obtained by subtracting the height of the top of the virtual triangular pyramid is In the truncated pyramid of the present invention, the area of the upper bottom (C) of the truncated pyramid is
- the area of (b) is preferably 1Z100 to 1_16, and more preferably 1 to 80 to 1Z25. If the area ratio between the upper base (c) and the lower base (b) of the truncated triangular pyramid is less than 1Z100, the adhesiveness to the base material tends to be poor. If it exceeds, the retroreflectivity tends to decrease.
- the angle (f) formed by each side surface of the frustum of the triangular pyramid in the present invention is 85 to 95 degrees, preferably 88 to 93 degrees, and more preferably 89 to 91 degrees. Most preferably from 89.05 to 90.05 degrees. If the angle between each side of the truncated triangular pyramid is less than 85 degrees, or more than 95 degrees, the retroreflectivity tends to decrease.
- the sizes of the triangular truncated pyramid microprisms of the present invention may be all unified or may be large and small in size.
- the truncated triangular pyramid-shaped retroreflective sheet of the present invention comprises a molding die (female die) in which a triangular truncated pyramid-shaped microprism is arranged in an inverted concave shape on a metal mold in a close-packed manner. ) Is transferred to a resin sheet (resin film) which is flexible and has excellent optical transparency, whereby the shape of the mold can be imparted to the resin sheet (resin film) to produce the resin sheet.
- a molding die female die
- a triangular truncated pyramid-shaped microprism is arranged in an inverted concave shape on a metal mold in a close-packed manner.
- the resin sheet (resin film) for providing the triangular truncated pyramid microprism used in the present invention has a thickness of 30 to 300 / xm, preferably 50 to 250 jum, and more preferably. Is 100 to 200 // m, and the total light transmittance is 20% or more, preferably 30% or more, and more preferably 60% or more.
- the thickness of the resin sheet (resin film) is less than 3 0 ⁇ ⁇ , when granting a prism shape, there is a tendency that defects such as pinholes are easily generated, when it exceeds 3 0 0 / xm is recursively Properties tend to decrease. If the total light transmittance of the resin sheet (resin film) is less than 20%, the recursiveness tends to decrease.
- the resin for providing the truncated triangular pyramid microprism used in the present invention include acrylic resin, polycarbonate resin, polystyrene resin, polyester resin, polyethylene resin, polypropylene resin, polyvinyl chloride resin, polyarylate resin, polyurethane resin, and epoxy resin.
- a resin selected from the group consisting of a resin, a fluororesin, and a cellulosic resin or a mixture of two or more resins can be used.
- acrylic resin, polycarbonate resin and polyarylate resin are preferably used from the viewpoint of resin transparency and processability of the prism
- acrylyl resin and polyarylate resin are preferably used from the viewpoint of weather resistance. .
- an ultraviolet absorber selected from benzotriazole-based, benzophenone-based and triazine-based resins may be used, if necessary, for the purpose of improving weather resistance.
- thioxanthene coumarin, perylene, methine, benzopyran, thioindigo, anthraquinone, etc.
- Organic dyes and organic pigments such as phthalocyanine can be added.
- the following method is used to manufacture a molding die (female die) in which a triangular truncated pyramid-shaped microprism is placed in a close-packed shape on a metal die as an inverted concave shape. can do.
- a super-hard byte for example, a diamond byte, which has a tip angle calculated from an assumed triangular pyramid shape
- a base material such as copper whose surface is ground flat.
- each direction repetition pitch (a have a 2, a 3) and the depth of the groove (virtual triangular pyramid height
- the upper part of the triangular pyramid obtained by cutting a parallel groove having a V-shaped cross-section according to the angle between the sides, and the distance between the upper base (c) and the lower base (d) is predetermined. Cut to the height of In this way, a male mold in which convex triangular truncated pyramids are arranged in a close-packed manner is produced. Next, using the obtained male mold, a concave female mold whose nickel shape is inverted by an electrodeposition method is produced.
- the method of transferring the reflecting element (triangular pyramid microprism) of the present invention to a resin sheet (resin film) is not particularly limited.
- Known methods such as a method of heating and pressing the above-mentioned mold, a method of forming a mold on a roll or a belt, and transferring the sheet while feeding the sheet can be employed.
- FIG. 1 One embodiment of a preferred structure example of the truncated triangular pyramid microprism retroreflective sheeting of the present invention is shown in FIG.
- (3) is a reflective element layer in which the truncated triangular pyramidal microprism (retroreflective element) of the present invention is arranged in a close-packed shape on one side, and (2) is a reflective element layer.
- the reflective element layer (3) and the reflective element containing layer (2) are usually integral, but separate layers may be laminated.
- the retroreflective sheeting of the present invention includes a surface protective layer (1) for protecting from physical or chemical damage such as contamination, scratches, deterioration due to light or heat, etc., depending on the purpose of use and the environment of use.
- Backing sheet (backing film) to achieve air-tight sealing structure on the back of the reflective element (truncated triangular prism) layer
- the retroreflective sheet according to the present invention further includes an adhesive layer and a release agent layer used for attaching the retroreflective sheet to another structure outside the backing sheet (backing film) (4). Can be provided.
- the resin constituting the surface protective layer (1) in the retroreflective sheet of the present invention may be the same as or different from the resin constituting the reflective element-containing layer (prism sheet) (2), for the purpose of improving the weather resistance. Also, the same ultraviolet absorber as the reflective element-containing layer (prism sheet) (2) may be added.
- the backing film (backing sheet) (4) in the retroreflective sheeting of the present invention has a reflective element layer in the convex support portion (5) partially provided by embossing on the backing film (backing sheet).
- Film (reflective element containing layer) ( 2) By adhering on the surface, a plurality of airtight chambers can be formed in which air is hermetically sealed on the back surface of the reflecting element (truncated triangular prism) layer (3). By securing the interface between the side surface (inclined surface) of the reflecting element (truncated triangular pyramid) and the air, it is possible to satisfy the total internal reflection condition of the micro prism and improve the retroreflection. it can.
- the resin used for the backing film (4) of the retroreflective sheet of the present invention may be the same as or different from the resin used for the prism sheet (2).
- the method for bonding the backing sheet (4) of the retroreflective sheet of the present invention to the reflective element-containing layer (2) is not particularly limited. Examples thereof include a heat-fusible resin bonding method, a thermosetting resin bonding method, an ultraviolet-curable resin bonding method, and an electron beam-curable resin bonding method known per se.
- the backing film (4) can be placed adjacent to the upper and lower surfaces (c) of the truncated triangular pyramid without the support, and the total internal reflection condition on the side of the triangular truncated pyramid is not hindered.
- the truncated triangular truncated prism retroreflective sheeting of the present invention uses a resin film (resin sheet) provided with a prism shape in a triangular pyramid prism because the tip is not as sharp as a triangular pyramid prism. During storage or during bonding to the backing sheet, it is possible to reduce the problem that the tip rubs, the prism shape changes, and the retroreflectivity varies.
- Reflective sheet does not cause halation at small angles of incidence. It has good angular characteristics and excellent directional characteristics.
- the truncated triangular truncated prism retroreflective sheeting of the present invention can be used for safety materials such as road signs, construction signs, etc., license plates for vehicles such as automobiles and motorcycles, rear-end collision prevention plates, clothing, lifesaving equipment, etc. Can be suitably used.
- a diamond byte having the tip angle is manufactured, and the convexity having a height of 80 ⁇ m is formed by the following steps.
- a copper male mold with a number of truncated triangular truncated prisms arranged in a close-packed manner was fabricated.
- a concave female mold whose nickel shape was inverted by an electrodeposition method was produced.
- three types of diamond bytes having a tip angle of 58 degrees, 86 degrees, and 92 degrees were prepared, and the surface was ground flat on a 20 O mm X 20 O mm copper plate.
- a parallel groove with a V-shaped cross section is repeated so that the repetition pitch is 2 25 ⁇ and the groove depth is 1 1 ⁇ . Cut with pattern. Then, using a diamond byte with a tip angle of 86 degrees, the repetition pitch is 230 ⁇ , the depth is 100; zm, and the intersection angle with side a is 63 degrees. A parallel groove with a V-shaped cross section was cut in a repeated pattern.
- the repetition pitch is 2 15 / m
- the depth is lOO / im
- the intersection angle with the side ai is 66 degrees
- the side a 2 is A parallel groove with a V-shaped cross section was cut in a repetitive pattern so that the intersection angle was 51 degrees.
- the upper plane was cut off so that the upper plane was parallel to the lower plane and the distance between the upper and lower planes was 80 m.
- Scotch Light # 8910 manufactured by Sumitomo 3LEM
- Scotch light diamond LDP grade white (manufactured by Sumitomo 3LEM) was used for the following evaluations.
- retroreflective sheets obtained in Examples and Comparative Examples were evaluated under the following conditions.
- E r Illuminance on the receiver (unit: L x) at the arrangement in Fig. 5 (incident angle a :, observation angle i3)
- En Illuminance on a plane perpendicular to the incident light at the sample center position (unit: Lx)
- d Distance between the sample surface center and the receiver (unit: m)
- A Area of sample surface (unit: m 2 )
- the retroreflectivity was evaluated by focusing on the retroreflection coefficient (A1) at the incident angle of 0.2 degrees and 5 degrees.
- coefficient of retroreflection is less than 900 C dZL X ⁇ m 2
- the retroreflection coefficient was 900 Cd / Lx ⁇ m 2 or more.
- Observation angle Evaluate at two levels with incident angles of 0.2 degrees, 5 degrees and 1 degree 30 degrees, calculate the retroreflection coefficient (A1 and B1) at each level, and calculate the ratio of the retroreflection coefficients B 1 / A1 was used as an index of the incident angle characteristics. The larger the number, the better the incident angle characteristics.
- the retroreflective sheet using the truncated triangular pyramid microprism of the present invention as a reflective element does not cause halation even at a small incident angle, and exhibits excellent incident angle characteristics and excellent directional characteristics. It is. - ⁇ s table l
- the retroreflective sheet having the retroreflective layer in which the truncated triangular pyramid-shaped prism of the present invention is arranged on one side in a close-packed manner, and having a plurality of hermetic chambers formed using a backing film, has a small incident angle. It does not cause angle halation, has good incident angle characteristics, and has excellent directional characteristics. Therefore, the truncated triangular pyramid-shaped prism retroreflective sheet of the present invention can be used for signs such as road signs and construction signs, number plates for vehicles such as automobiles and motorcycles, rear-end collision prevention plates, clothing, and safety materials such as lifesaving equipment. Can be suitably used.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/583,342 US7314284B2 (en) | 2003-12-17 | 2004-12-14 | Retroreflection sheeting and film for use in retroreflection sheeting |
JP2005516377A JP4694374B2 (ja) | 2003-12-17 | 2004-12-14 | 再帰性反射シート |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003420206 | 2003-12-17 | ||
JP2003-420206 | 2003-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005059605A1 true WO2005059605A1 (ja) | 2005-06-30 |
Family
ID=34697242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/018991 WO2005059605A1 (ja) | 2003-12-17 | 2004-12-14 | 再帰性反射シートとその再帰性反射シートに用いられるフィルム |
Country Status (3)
Country | Link |
---|---|
US (1) | US7314284B2 (ja) |
JP (1) | JP4694374B2 (ja) |
WO (1) | WO2005059605A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007047595A (ja) * | 2005-08-11 | 2007-02-22 | Kaneka Corp | 再帰性反射シート |
JP2010205513A (ja) * | 2009-03-02 | 2010-09-16 | Toppan Printing Co Ltd | El素子、並びにそれを用いた表示装置、ディスプレイ装置、及び液晶ディスプレイ装置 |
EP1985973A3 (en) * | 2007-04-27 | 2013-10-02 | Mitutoyo Corporation | Optical displacement measuring apparatus |
JP2015143785A (ja) * | 2014-01-31 | 2015-08-06 | 株式会社アスカネット | 立体像表示装置及び立体像表示方法 |
JP2015529854A (ja) * | 2012-08-27 | 2015-10-08 | エーブリー デニソン コーポレイションAvery Dennison Corporation | 低屈折率基材を備えた再帰反射体 |
JP2017033005A (ja) * | 2016-09-21 | 2017-02-09 | 株式会社アスカネット | 立体像表示装置及び立体像表示方法 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9127822B2 (en) * | 2008-10-10 | 2015-09-08 | Sunflower Corporation | Afocal optical concentrator |
WO2012051625A2 (en) | 2010-10-15 | 2012-04-19 | William Ross Mccluney | Optical distributor for room lighting |
JP6010108B2 (ja) * | 2011-04-01 | 2016-10-19 | スリーエム イノベイティブ プロパティズ カンパニー | トリアジン系紫外線吸収剤を含むフィルム |
WO2014174693A1 (ja) * | 2013-04-24 | 2014-10-30 | 株式会社アスカネット | 立体像表示装置及び立体像表示方法 |
JP2017116779A (ja) * | 2015-12-25 | 2017-06-29 | スリーエム イノベイティブ プロパティズ カンパニー | 再帰性反射ライセンスプレート、及び再帰性反射シート |
WO2019046403A1 (en) | 2017-08-29 | 2019-03-07 | Avery Dennison Corporation | RETROREFLECTIVE SHEET FOR A PROJECTOR-BASED DISPLAY SYSTEM |
CN111175865B (zh) * | 2020-01-17 | 2022-02-08 | 福建省安元光学科技有限公司 | 一种复合型微三棱镜反光膜 |
US20220365341A1 (en) * | 2021-05-12 | 2022-11-17 | Cm Visual Technology Corporation | Optical film |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58204401A (ja) * | 1982-05-22 | 1983-11-29 | 株式会社小糸製作所 | 自動車用反射器 |
JPH08201608A (ja) * | 1995-01-31 | 1996-08-09 | Nippon Carbide Ind Co Inc | 内部全反射型再帰反射シート |
JPH09304605A (ja) * | 1996-05-15 | 1997-11-28 | Sekisui Chem Co Ltd | 光制御シートの製造方法 |
WO1998018028A1 (fr) * | 1996-10-18 | 1998-04-30 | Nippon Carbide Kogyo Kabushiki Kaisha | Feuille retroreflechissante du type a angles cubiques tetraedriques |
JPH10253808A (ja) * | 1997-03-13 | 1998-09-25 | Toray Ind Inc | 光学シートおよびその製造方法と指向性面状光源 |
JPH11101905A (ja) * | 1997-07-29 | 1999-04-13 | Polyplastics Co | ポリブチレンテレフタレート樹脂製光反射体及びその製造方法 |
JPH11237506A (ja) * | 1998-02-20 | 1999-08-31 | Nippon Shokubai Co Ltd | 光選択透過膜 |
JP2001021708A (ja) * | 1999-07-05 | 2001-01-26 | Nippon Carbide Ind Co Inc | 再帰反射シート |
JP2001033609A (ja) * | 1999-04-21 | 2001-02-09 | Nippon Carbide Ind Co Inc | キューブコーナー型再帰反射シート及びキューブコーナー金型 |
JP2003084112A (ja) * | 2001-09-10 | 2003-03-19 | Tadahiro Yamamoto | 本当の顔を写すことができる「立体鏡」 |
US20030223137A1 (en) * | 2002-04-05 | 2003-12-04 | Yoshinori Araki | Reflective sheet, articles made therefrom and methods of using same |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2481757A (en) | 1945-05-23 | 1949-09-13 | Thoger G Jungersen | Optical reflecting material |
JP3217164B2 (ja) | 1992-11-19 | 2001-10-09 | 紀和化学工業株式会社 | 再帰性反射シート及びその製造方法 |
US5272562A (en) | 1993-02-05 | 1993-12-21 | Minnesota Mining And Manufacturing Company | Cube-corner retroreflective articles |
JP3204789B2 (ja) | 1993-03-15 | 2001-09-04 | ミサワホーム株式会社 | 小屋裏換気構造 |
JP3221527B2 (ja) | 1993-06-04 | 2001-10-22 | 日本カーバイド工業株式会社 | 再帰性反射シート |
JPH09212115A (ja) | 1996-02-02 | 1997-08-15 | Minnesota Mining & Mfg Co <3M> | 再帰性反射シート及び再帰性反射性能を有する物品 |
JP2954709B2 (ja) * | 1996-10-18 | 1999-09-27 | 日本カーバイド工業株式会社 | 三角錐型キューブコーナー型再帰反射シート |
JP2000162417A (ja) * | 1998-11-26 | 2000-06-16 | Idemitsu Petrochem Co Ltd | 再帰反射性シート及び安全用品 |
KR20010009720A (ko) * | 1999-07-13 | 2001-02-05 | 박호군 | 3차원 영상의 다자 시청용 스크린 및 그 제작방법 |
JP3468418B2 (ja) | 2000-03-15 | 2003-11-17 | 日本カーバイド工業株式会社 | 三角錐型キユーブコーナー型再帰反射シート |
JP2003084113A (ja) | 2001-09-14 | 2003-03-19 | Nippon Carbide Ind Co Inc | 蛍光性再帰反射シート |
JP2003206513A (ja) * | 2002-01-16 | 2003-07-25 | Three M Innovative Properties Co | 再帰反射部材及び路面標示体 |
-
2004
- 2004-12-14 JP JP2005516377A patent/JP4694374B2/ja not_active Expired - Fee Related
- 2004-12-14 US US10/583,342 patent/US7314284B2/en not_active Expired - Fee Related
- 2004-12-14 WO PCT/JP2004/018991 patent/WO2005059605A1/ja active Application Filing
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58204401A (ja) * | 1982-05-22 | 1983-11-29 | 株式会社小糸製作所 | 自動車用反射器 |
JPH08201608A (ja) * | 1995-01-31 | 1996-08-09 | Nippon Carbide Ind Co Inc | 内部全反射型再帰反射シート |
JPH09304605A (ja) * | 1996-05-15 | 1997-11-28 | Sekisui Chem Co Ltd | 光制御シートの製造方法 |
WO1998018028A1 (fr) * | 1996-10-18 | 1998-04-30 | Nippon Carbide Kogyo Kabushiki Kaisha | Feuille retroreflechissante du type a angles cubiques tetraedriques |
JPH10253808A (ja) * | 1997-03-13 | 1998-09-25 | Toray Ind Inc | 光学シートおよびその製造方法と指向性面状光源 |
JPH11101905A (ja) * | 1997-07-29 | 1999-04-13 | Polyplastics Co | ポリブチレンテレフタレート樹脂製光反射体及びその製造方法 |
JPH11237506A (ja) * | 1998-02-20 | 1999-08-31 | Nippon Shokubai Co Ltd | 光選択透過膜 |
JP2001033609A (ja) * | 1999-04-21 | 2001-02-09 | Nippon Carbide Ind Co Inc | キューブコーナー型再帰反射シート及びキューブコーナー金型 |
JP2001021708A (ja) * | 1999-07-05 | 2001-01-26 | Nippon Carbide Ind Co Inc | 再帰反射シート |
JP2003084112A (ja) * | 2001-09-10 | 2003-03-19 | Tadahiro Yamamoto | 本当の顔を写すことができる「立体鏡」 |
US20030223137A1 (en) * | 2002-04-05 | 2003-12-04 | Yoshinori Araki | Reflective sheet, articles made therefrom and methods of using same |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007047595A (ja) * | 2005-08-11 | 2007-02-22 | Kaneka Corp | 再帰性反射シート |
JP4667162B2 (ja) * | 2005-08-11 | 2011-04-06 | 株式会社カネカ | 再帰性反射シート |
EP1985973A3 (en) * | 2007-04-27 | 2013-10-02 | Mitutoyo Corporation | Optical displacement measuring apparatus |
JP2010205513A (ja) * | 2009-03-02 | 2010-09-16 | Toppan Printing Co Ltd | El素子、並びにそれを用いた表示装置、ディスプレイ装置、及び液晶ディスプレイ装置 |
JP2015529854A (ja) * | 2012-08-27 | 2015-10-08 | エーブリー デニソン コーポレイションAvery Dennison Corporation | 低屈折率基材を備えた再帰反射体 |
JP2015143785A (ja) * | 2014-01-31 | 2015-08-06 | 株式会社アスカネット | 立体像表示装置及び立体像表示方法 |
JP2017033005A (ja) * | 2016-09-21 | 2017-02-09 | 株式会社アスカネット | 立体像表示装置及び立体像表示方法 |
Also Published As
Publication number | Publication date |
---|---|
JP4694374B2 (ja) | 2011-06-08 |
US7314284B2 (en) | 2008-01-01 |
US20070159696A1 (en) | 2007-07-12 |
JPWO2005059605A1 (ja) | 2007-07-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4078450B2 (ja) | 不等辺の基部三角形を有する再帰反射キューブコーナ製品 | |
JP4225897B2 (ja) | 再帰反射装置 | |
JP4009751B2 (ja) | 高傾斜再帰反射キューブコーナー物品 | |
US9658371B2 (en) | Metalized microprismatic retroreflective film with improved observation angularity | |
CN1198988C (zh) | 为一表面提供后向反光性能的组合物和方法 | |
WO2005059605A1 (ja) | 再帰性反射シートとその再帰性反射シートに用いられるフィルム | |
US7371339B2 (en) | Prismatic retroreflector having a multi-plane facet | |
JP2000505167A (ja) | 顕著性のある標識システム | |
JPH09504624A (ja) | 追従可能なキューブコーナー再帰反射シート材料 | |
JPH06501111A (ja) | 改良された角度性を有する逆反射材料 | |
KR20160045782A (ko) | 저탄성률 층을 포함하는 재귀반사성 시트류 | |
WO1999028771A1 (en) | Miniature micro prism retroreflector | |
KR100767228B1 (ko) | 삼각뿔형 큐브코너 재귀반사 소자 | |
JP3824471B2 (ja) | キューブコーナー型再帰反射シート及びキューブコーナー金型 | |
KR102275227B1 (ko) | 실질적으로 무정형인 중합체성 층을 포함하는 재귀반사성 시트류 | |
JP4113981B2 (ja) | 二方向性再帰反射シート | |
JPH08201608A (ja) | 内部全反射型再帰反射シート | |
WO2005059606A1 (ja) | 再帰性反射シートとその再帰性反射シートに用いられるフィルム | |
CN1187246A (zh) | 具有不规则基体三角的反光立体角制品 | |
MXPA97010369A (en) | Reinforced retrorreflejantes elements and method for your elaborac | |
MXPA99008652A (en) | Wide incident angle reflective plate | |
MXPA97009540A (en) | Retrorreflector article of cubic corners that holds scalene triangles b |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2005516377 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007159696 Country of ref document: US Ref document number: 10583342 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase | ||
WWP | Wipo information: published in national office |
Ref document number: 10583342 Country of ref document: US |