LAMINATE AND INDICATOR

• Main Authors: MEMITA YUICHI, YAMAKAWA YUTAKA, SHIMATANI TAKAFUMI, NISHI MASAYUKI, ASAMI AYAKA
• Format: Patent
• Language: English; Japanese
• Published: 15.09.2022
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASURING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PERFORMING OPERATIONS; PHYSICS; PLASMA TECHNIQUE; POLISHES; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS; SEMICONDUCTOR DEVICES; TESTING; TRANSPORTING

To provide a laminate having a color change layer configured to change a color tone thereof by detecting at least one kind selected from a group consisting of plasma, ozone, ion, ultraviolet light and radical-containing gas, and a substrate layer, the laminate with a faster color change speed at the color change layer, capable of accurately evaluating a color tone change and improving a color change sensitivity in the color change layer.SOLUTION: A laminate includes a color change layer, an underlayer and a substrate layer in this order. The color change layer includes a base material and a pigment. The pigment is a component that changes a color tone when at least one kind selected from a group consisting of plasma, ozone, ion, ultraviolet light and radical-containing gas is detected. A color difference (ΔE*ab) of the underlayer and a color tone of the color change layer after a color change is 6.5 or less.SELECTED DRAWING: Figure 1 【課題】 プラズマ、オゾン、イオン、紫外線及びラジカル含有ガスからなる群より選ばれる少なくとも１種を検知して色調が変化する変色層と基材層とを有する積層体において、変色層の変色速度が速く、色調の変化を正確に評価でき、変色層の変色感度が向上した積層体を提供すること。【解決手段】 変色層と、下層と、基材層とをこの順で備え、前記変色層は、ベース材料と色素を含有し、色素は、プラズマ、オゾン、イオン、紫外線及びラジカル含有ガスからなる群より選ばれる少なくとも１種類を検知すると色調が変化する成分であり、前記下層と前記変色層の変色後の色調との色差（ΔＥ＊ａｂ）が６．５以下である、積層体。【選択図】図１