# US 2019/0170916 A1 · Retroreflective tape > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170916 A1 - Document ID: US20190170916A1 - Status: Published application - Kind: A1 - Application number: 16/313,985 - Filed: 2017-06-28 - Published: 2019-06-06 - Earliest claimed: 2016-06-30 - Assignees: Unitika Sparklite Ltd. - Applicants: Unitika Sparklite Ltd. - Inventors: Yasutaka NISHIMURA; Motomu FUJIKI; Atsumi NISHIGAKI - Web page: https://patentgrep.com/patent/US20190170916A1 ## CPC - G02B 5/128: transparent spheres being embedded in matrix - A41D 1/00: Garments (for children A41D11/00) - A41D 13/01: with reflective or luminous safety means {(visible signalling arrangements G08B5/00)} - B32B 5/16: characterised by features of a layer formed of particles, e.g. chips, powder {or granules (layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02)} - B32B 7/06: permitting easy separation - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 15/09: comprising polyesters - B32B 15/16: next to a particulate layer - B32B 27/20: using fillers, pigments, thixotroping agents - C09J 7/203: {characterised by the structure of the release feature on the carrier layer} - C09J 7/28: Metal sheet (metallised plastics C09J7/22) - B32B 2264/101: Glass - B32B 2307/412: Transparent - B32B 2307/416: Reflective - B32B 2405/00: Adhesive articles, e.g. adhesive tapes - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - A41D: OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) ## Abstract The purpose of the present invention is to provide a retroreflective tape having superior flexibility, retroreflective properties, and cleaning durability, as well as making possible clear formation of a boundary between a retroreflective region and a non-retroreflective region. Provided is a retroreflective tape in which a retroreflective region is provided on part of a base material layer, wherein: the retroreflective region is a region having a fixing resin layer, transparent microspheres embedded in the fixing resin layer, and a reflective layer provided between the transparent microspheres and the fixing resin layer and formed from a metal film; the index of refraction of the transparent microspheres is 1.6-2.5; and the transparent microspheres are embedded in the fixing resin layer such that the exposure ratio is 53-70%. ## Claims ### Claim 1 A retroreflective tape comprising a retroreflective region partially provided on a base layer, wherein the retroreflective region is a region having a fixing resin layer, a transparent microsphere embedded in the fixing resin layer, and a reflective layer formed of a metal film provided between the transparent microsphere and the fixing resin layer, the transparent microsphere has a refractive index of 1.6 to 2.5, and the transparent microsphere is embedded in the fixing resin layer with an exposure ratio of 53 to 70%. ### Claim 2 (depends on 1) The retroreflective tape according to claim 1, wherein the base layer is a support base provided on the side of the fixing resin layer where the transparent microsphere is not embedded, and an incident light side of the transparent microsphere is exposed on a surface. ### Claim 3 (depends on 1) The retroreflective tape according to claim 1, wherein the base layer is a releasable release base comprising a laminate comprising a thermoplastic film stacked on a base film, and the thermoplastic film embeds a region of the transparent microsphere exposed from the fixing resin layer. ### Claim 4 (depends on 1) The retroreflective tape according to claim 1, wherein a non-retroreflective region without the retroreflective region is in communication in a longitudinal direction and/or a width direction of the retroreflective tape, and the retroreflective region is partitioned into a plurality of regions by the non-retroreflective region to form a design pattern. ### Claim 5 (depends on 1) The retroreflective tape according to claim 1, wherein the non-retroreflective region without the retroreflective region does not form a linear region extending parallel to the width direction of the retroreflective tape. ### Claim 6 (depends on 1) The retroreflective tape according to claim 1, wherein the non-retroreflective region without the retroreflective region forms a plurality of linear regions extending in two or more different directions. ### Claim 7 (depends on 6) The retroreflective tape according to claim 6, wherein the plurality of linear regions extending in the two or more different directions intersect with each other to form an intersection. ### Claim 8 (depends on 1) The retroreflective tape according to claim 1, which is used by being attached to or sewn on an adherend. ### Claim 9 (depends on 1) The retroreflective tape according to claim 1, which is used for attachment to clothing. ### Claim 10 (depends on 1) Use of the retroreflective tape according to claim 1 as a member to be attached to or sewn on an adherend. ### Claim 11 (depends on 1) Use of the retroreflective tape according to claim 1 as a member to be attached to clothing.