Abstract: A multilayer sheet includes a first resin layer, a second resin layer, a particle-containing layer disposed at least between the first and second resin layers and including plural particles and gaps formed between the particles, and an intermediate layer disposed at least one selected from between the first resin layer and the particle-containing layer or between the second resin layer and the particle-containing layer, including a copolymer having a weight average molecular weight (Mw) of 300,000 or more and a molecular weight distribution, expressed as a ratio of the weight average molecular weight (Mw) to a number average molecular weight (Mn), of 6.0 or less and a structural moiety derived from a crosslinking agent adapted to crosslink the copolymer, and having a crosslinking density of from more than 0 mol/m3 to 450 mol/m3.

Abstract: A manufacturing device for an optical sheet according to the present invention includes a first belt 34 extending on a first heating roll 31 and a first chill roll 32 and a second belt 44 extending on a second heating roll 41 and a second chill roll 42. The first heating roll 31 presses, from the surface of the second belt 44, a second belt non-contact portion PT2 of the second belt 44 facing the first belt 34 where the second heating roll 41 is not in contact with the second chill roll 42. The second chill roll 42 presses, from the surface of the first belt, a first belt non-contact portion PT1 of the first belt 34 facing the second belt 44 where the first heating roll 31 is not in contact with the first chill roll 32.

Abstract: In cube-corner retroreflective sheeting 3, cube-corner retroreflective elements in at least two mutually adjacent regions A and B rotate with each other around an axis perpendicular to the sheeting, in which cube-corner retroreflective elements 11 and 12 not in contact with boundaries between the regions A and B are cube-corner retroreflective elements having a hexagonal shape, and cube-corner retroreflective elements 11s, 12s, 11t and 12t in contact with the boundaries between the regions A and B are cube-corner retroreflective elements having a shape obtained by cutting parts of one or two reflective lateral surfaces of the cube-corner retroreflective element having a hexagonal shape where the partly cut reflective lateral surfaces are in contact with the boundaries.

Abstract: A sign plate 1 includes a plate-shaped metal plate 2 having a a slot 23 which penetrates from the front surface 21 toward the back surface 22, an RFID inlay 3 arranged on the front surface 21 of the metal plate 2 so as to straddle the slot 23, and a retroreflective sheeting 4 arranged on the front surface 21 of the metal plate 2 and having a mirror reflective region 41 and a non-mirror reflective region 42. In a plan view of the retroreflective sheeting 4, the mirror reflective region 41 includes a plurality of mirror reflective regions which are formed as independent regions by being divided by the non-mirror reflective region 42, the slot 23 region overlaps the mirror reflective region 41 and the non-mirror reflective region 42, and the overlapping mirror reflective region 41 does not straddle the slot 23.

Abstract: A multilayer sheet includes a first resin layer, a second resin layer, a particle-containing layer disposed at least between the first and second resin layers and including plural particles and gaps formed between the particles, and an intermediate layer disposed at least one selected from between the first resin layer and the particle-containing layer or between the second resin layer and the particle-containing layer, including a copolymer having a weight average molecular weight (Mw) of 300,000 or more and a molecular weight distribution, expressed as a ratio of the weight average molecular weight (Mw) to a number average molecular weight (Mn), of 6.0 or less and a structural moiety derived from a crosslinking agent adapted to crosslink the copolymer, and having a crosslinking density of from more than 0 mol/m3 to 450 mol/m3.

Abstract: An internally illuminated sign device according to an embodiment includes a sign panel and a lighting unit that applies light from the rear side to the sign panel. The sign panel includes a prism layer, an air layer disposed on an interface on the rear side of the prism layer, a first colored display layer of optical transparency disposed on the front side of the prism layer and having a predetermined shape, and a second colored display layer of optical transparency disposed on the rear side of the air layer in a shape visible the same as the first colored display layer. The second colored display layer is disposed at a position laid over the first colored display layer when the sign panel is seen in front.

Abstract: A sign plate 1 includes a plate-shaped metal plate 2 having a a slot 23 which penetrates from the front surface 21 toward the back surface 22, an RFID inlay 3 arranged on the front surface 21 of the metal plate 2 so as to straddle the slot 23, and a retroreflective sheeting 4 arranged on the front surface 21 of the metal plate 2 and having a mirror reflective region 41 and a non-mirror reflective region 42. In a plan view of the retroreflective sheeting 4, the mirror reflective region 41 includes a plurality of mirror reflective regions which are formed as independent regions by being divided by the non-mirror reflective region 42, the slot 23 region overlaps the mirror reflective region 41 and the non-mirror reflective region 42, and the overlapping mirror reflective region 41 does not straddle the slot 23.

Abstract: An optical-sheet manufacturing device 1 is provided with a first belt-shaped mold S1, a second belt-shaped mold S2, first and second supply units that supplies resins to the belt-shaped molds S1 and S2, respectively, and first and second embossing units that embosses the supplied resins on the first and second belt-shaped molds S1 and S2 to form first and second embossed sheets A? and B?. The optical-sheet manufacturing device is characterized in that the first embossed sheet A? embossed on the first belt-shaped mold S1 and the second embossed sheet B? embossed on the second belt-shaped mold S2 are shifted by the rotation of the first belt-shaped mold S1 and the second belt-shaped mold S2 and the first embossed sheet A? and the second embossed sheet B? are sandwiched between the first belt-shaped mold S1 and the second belt-shaped mold S2 and are laminated.

Abstract: The optical composite sheet 1 includes a first optical layer 10 and a second optical layer 20, and a low-refractive index layer 30 that is laminated at least between the first optical layer 10 and the second optical layer 20 and has a lower refractive index than the refractive indices of the first optical layer 10 and the second optical layer 20. The low-refractive index layer 30 is characterized by containing many particles 50 having an average particle size of 5 nm to 300 nm, a binder resin 35 that binds the surface sites of the particles 50 to each other, and gaps 36 that are formed among the particles.

Abstract: [Object] An apparatus and a method for producing optical sheeting with which increased productivity can be achieved while maintaining the accuracy of produced optical sheeting.

Abstract: The present invention on provides retroreflective sheeting (100) having at least two types of set images (L1, L2) adjacent to one another each termed as a set of a number of points of image (P1, P2) that are directionally visible in a predetermined direction.

Abstract: An object of the invention is to provide a multi-directional cube corner retroreflective article (may be referred to as a retroreflective article, hereinafter) capable of improving entrance angle characteristic and rotation angle characteristic. A multi-directional cube corner retroreflective article, wherein a large number of retroreflective element assemblies, each of which is formed by assembling triangular pyramidal cube corner retroreflective elements each having an isosceles-triangular base (ABC) and an element apex (H) while sharing an apex (C) and base lines of equal length (AC and BC) of the base, are connected, and a shape of an outer circumference of each of the retroreflective element assemblies is a regular polygon and the bases of at least two of the triangular pyramidal cube corner retroreflective elements are not parallel to a common plane including the outer circumference.

Abstract: In cube-corner retroreflective sheeting 3, cube-corner retroreflective elements in at least two mutually adjacent regions A and B rotate with each other around an axis perpendicular to the sheeting, in which cube-corner retroreflective elements 11 and 12 not in contact with boundaries between the regions A and B are cube-corner retroreflective elements having a hexagonal shape, and cube-corner retroreflective elements 11s, 12s, 11t and 12t in contact with the boundaries between the regions A and B are cube-corner retroreflective elements having a shape obtained by cutting parts of one or two reflective lateral surfaces of the cube-corner retroreflective element having a hexagonal shape where the partly cut reflective lateral surfaces are in contact with the boundaries.

Abstract: A retroreflective article having excellent retroreflective efficiency, entrance angle characteristic, observation angle characteristic, and rotation angle characteristic is provided.

Abstract: A hexagonal cube corner retroreflective article has a set of a large number of hexagonal cube corner retroreflective elements. In the retroreflective element, at least one reflective lateral face (face a, face b, and/or, face c) is divided into a pair of an upper secondary reflective lateral face (face a1, face b1, and/or face c1) and a lower secondary reflective lateral face (face a2, face b2, and/or face c2) partitioned by a line segment (EF, FD, and/or DE) connected by apexes (E, F, and/or D) constituting that reflective lateral face, in which two secondary reflective lateral faces constituting the pair of the secondary reflective lateral faces are not on the same plane. By these features the retroreflective article provides excellent observational angle characteristics.

Abstract: The present invention relates to a triangular pyramidal cube corner retroreflective article and a producing method thereof. In the triangular pyramidal cube corner retroreflective article, a triangular pyramidal cube corner retroreflective element pair group is disposed in a closest-packed fashion on a common plane defined by three base lines, and the each of retroreflective elements in a pair having one base line (A-B) shared by the retroreflective elements in the pair. The triangular pyramidal cube corner retroreflective article includes a first element pair group, in which two interior angles (?=?BAC and ?=?ABC) formed by the shared base line of the element pair and two other base lines are different from each other and the element pair is line-symmetrically disposed in relation to the shared base line (A-B); and a second element pair group, in which the element pair is congruent to a line-symmetrical shape to the first element pair in relation to a line segment connecting vertexes of the base planes.

Abstract: A cube-corner retroreflective article is provided with a number of cube-corner retroreflective element pairs each formed by a pair of cube-corner retroreflective elements sharing one side. Each of the cube-corner retroreflective elements has reflective lateral surfaces including two trapezoidal reflective lateral surfaces and one pentagonal or isosceles-triangular reflective lateral surface, and a projection shape of a quadrangle when projected onto a common plane, wherein ratios (rHA/rHC and rHB/rHC) between a length (rHC) of a ridge (HC) shared by the trapezoidal reflective lateral surfaces (HAFC and HBGC) and lengths (rHA and rHB) of other ridges (HA and HB) are in a range of 0.5 to 1.5.

Abstract: A retroreflection article formed of groups of grooves in three directions having substantially V-shaped cross sections, including a large number of pairs of cube corner retroreflection elements being disposed, the elements in each pair being formed to be rotationally symmetric while sharing one base line forming the retroreflection elements. A group of parallel V-shaped grooves in one direction (grooves x) forming the group of pairs of retroreflection elements has straight-line bottom tracks, the groups of parallel V-shaped grooves in the other two directions (grooves w1 and w2) have continuous bent-line bottom tracks bent at intersection points with the grooves x, the bottom tracks of the groups of parallel V-shaped grooves in the two directions (grooves w1 and w2) do not intersect with each other, and projection geometries of base planes (A-B-E1-D1 and A-B-E2-D2) forming the retroreflection elements are quadrilaterals.

Abstract: [Object] A retroreflective sheeting that is provided with a set image having excellent anticounterfeit characteristic and information transmission characteristic is provided.

Abstract: There is provided a hexagonal cube corner retroreflective article with excellent observation angle characteristics. The hexagonal cube corner retroreflective article has a set of a large number of hexagonal cube corner retroreflective elements. In the hexagonal cube corner retroreflective element, at least one reflective lateral face (face a, face b, and/or, face c) is divided into a pair of an upper secondary reflective lateral face (face a1, face b1, and/or face c1) and a lower secondary reflective lateral face (face a2, face b2, and/or face c2) partitioned by a line segment (EF, FD, and/or DE) connected by apexes (E, F, and/or D) constituting that reflective lateral face, in which two secondary reflective lateral faces constituting the pair of the secondary reflective lateral faces are not on the same plane.