Abstract: An article, including a transparent sheet having a first side with a structured surface The structured surface includes microprisms thereon, the microprisms being part of a microprism array on the structured surface. Each one of the microprisms are part of adjacent pairs of the microprisms, such that for each one of the adjacent pairs: the first microprism has a first lateral face, a second lateral face, and a third lateral face, the second microprism has a first lateral face, a second lateral face, and a third lateral face, and there is a continuous surface transition with a maintenance of surface continuity between the second lateral face of the first microprism and the third lateral face of the second microprism, without the presence of a seam, ridge, gap or tooling line.

Abstract: Method of manufacturing articles, including providing a substrate having a surface, forming first and second sets of first and second grooves in the surface, respectively, the first grooves parallel to each other along a same first direction across the surface and each of the first grooves including a repeating interleaved pattern of at least two first zones and at least two second zones and a maximum depth of the first zones greater than a maximum depth of the second zones, and the second grooves parallel to each other along a same second direction across the surface, the second direction being substantially perpendicular to the first direction, the second grooves passing through second zones of the first grooves, where a groove pattern is thereby formed on the surface, the groove pattern including microprisms. Articles including a substrate surface with such groove patterns or inverted groove patterns including microprisms or inverted microprisms.

Abstract: One embodiment of the present disclosure provides a black microprismatic retroreflective film. The black microprismatic retroreflective film comprises a body layer and a black color layer. The body layer includes microprismatic optical elements. The black color layer gives the black microprismatic retroreflective film a daytime color of black. The black microprismatic retroreflective film has a coefficient of retroreflectivity greater than 50 cd/lx/m2 at a ?4 degree entrance angle and 0.2 degree observation angle.

Abstract: A multi-layer microprismatic retroreflective film and a method of manufacturing the same. In one embodiment, the film includes: (1) a prism layer including an acrylic polymeric material and containing microprisms, (2) a strengthening layer including a polymeric material different from the acrylic polymeric material and (3) a buffer section including acrylic polymeric material located between the microprisms of the prism layer and the strengthening layer.

Abstract: One aspect of the present disclosure provides microprismatic retroreflective film that includes a substrate and metalized microprisms located on the substrate. At least a portion of the metalized microprisms are forward-tilted microprisms, and at least a portion of the forward-tilted microprisms are arranged in matched pairs and are aligned with the plane of optical axis tilting aligned at an angle ranging from about 10 to 80 degrees with an edge of the microprismatic retroreflective film.

Abstract: One aspect of the present disclosure provides microprismatic retroreflective film that includes a substrate and metalized microprisms located on the substrate. At least a portion of the metalized microprisms are forward-tilted microprisms, and at least a portion of the forward-tilted microprisms are aligned with the plane of optical axis tilting aligned at an angle ranging from about 10 to 80 degrees with an edge of the microprismatic retroreflective film.

Abstract: One aspect of the present disclosure provides microprismatic retroreflective film that includes a substrate and metalized microprisms located on the substrate. At least a portion of the metalized microprisms are forward-tilted microprisms, and at least a portion of the forward-tilted microprisms are aligned with the plane of optical axis tilting aligned at an angle ranging from about 10 to 80 degrees with an edge of the microprismatic retroreflective film.

Abstract: A multi-layer microprismatic retroreflective film and a method of manufacturing the same. In one embodiment, the film includes: (1) a prism layer including an acrylic polymeric material and containing microprisms, (2) a strengthening layer including a polymeric material different from the acrylic polymeric material and (3) a buffer section including acrylic polymeric material located between the microprisms of the prism layer and the strengthening layer.

Abstract: In one aspect, there is provided a retroreflective film, comprising a retroreflective sub-structure, and a transparent polymeric film, having a surface roughness profile where the Arithmetic Mean Deviation of the Roughness Profile (Ra) ranges from about 0.18 microns to about 1.30 microns and where the Mean Spacing of Local Peaks (R-S) in the printing direction ranges from about 10 microns to about 85 microns, located over and coupled to the retroreflective sub-structure and wherein the polymeric film as a Vicat softening point of about 90° or greater.

Abstract: In one aspect, there is provided a retroreflective film, comprising a retroreflective sub-structure, and a transparent polymeric film, having a surface roughness profile where the Arithmetic Mean Deviation of the Roughness Profile (Ra) ranges from about 0.18 microns to about 1.30 microns and where the Mean Spacing of Local Peaks (R-S) in the printing direction ranges from about 10 microns to about 85 microns, located over and coupled to the retroreflective sub-structure.

Abstract: In one aspect, there is provided a retroreflective film, comprising a retroreflective sub-structure, and a transparent polymeric film, having a surface roughness profile where the Arithmetic Mean Deviation of the Roughness Profile (Ra) ranges from about 0.18 microns to about 1.30 microns and where the Mean Spacing of Local Peaks (R-S) in the printing direction ranges from about 10 microns to about 85 microns, located over and coupled to the retroreflective sub-structure and wherein the polymeric film as a Vicat softening point of about 90° or greater.

Abstract: In one aspect, there is provided a retroreflective film, comprising a retroreflective sub-structure, and a transparent polymeric film, having a surface roughness profile where the Arithmetic Mean Deviation of the Roughness Profile (Ra) ranges from about 0.18 microns to about 1.30 microns and where the Mean Spacing of Local Peaks (R—S) in the printing direction ranges from about 10 microns to about 85 microns, located over and coupled to the retroreflective sub-structure.