Reflective sheet and transfer film for reflective sheet
Provided are a reflective sheet including a cholesteric liquid crystal layer and having excellent reflection wavelength range, diffuse reflectivity, reflectivity, hardness, and scratch resistance; and a transfer film for a reflective sheet that is used for the reflective sheet. The reflective sheet...
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| creator | Saneto, Ryuji Kaneiwa, Hideki Yamamoto, Akira Ishiguro, Makoto Nagai, Michio |
| description | Provided are a reflective sheet including a cholesteric liquid crystal layer and having excellent reflection wavelength range, diffuse reflectivity, reflectivity, hardness, and scratch resistance; and a transfer film for a reflective sheet that is used for the reflective sheet. The reflective sheet includes a substrate, an adhesive layer, a cholesteric liquid crystal layer, and a hard coat layer in this order, in which in a cross-section of the cholesteric liquid crystal layer observed, at least a part of bright portions and dark portions has a flapping structure, the cholesteric liquid crystal layer has a pitch gradient structure in which a helical pitch changes in a thickness direction, and the helical pitch on the adhesive layer side is larger than that on the hard coat layer side. |
| format | Patent |
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The reflective sheet includes a substrate, an adhesive layer, a cholesteric liquid crystal layer, and a hard coat layer in this order, in which in a cross-section of the cholesteric liquid crystal layer observed, at least a part of bright portions and dark portions has a flapping structure, the cholesteric liquid crystal layer has a pitch gradient structure in which a helical pitch changes in a thickness direction, and the helical pitch on the adhesive layer side is larger than that on the hard coat layer side.</description><language>eng</language><subject>DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ; FREQUENCY-CHANGING ; LAYERED PRODUCTS ; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ; NON-LINEAR OPTICS ; OPTICAL ANALOGUE/DIGITAL CONVERTERS ; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICAL LOGIC ELEMENTS ; OPTICS ; PERFORMING OPERATIONS ; PHYSICS ; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF ; TRANSPORTING</subject><creationdate>2024</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20240220&DB=EPODOC&CC=US&NR=11906865B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20240220&DB=EPODOC&CC=US&NR=11906865B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Saneto, Ryuji</creatorcontrib><creatorcontrib>Kaneiwa, Hideki</creatorcontrib><creatorcontrib>Yamamoto, Akira</creatorcontrib><creatorcontrib>Ishiguro, Makoto</creatorcontrib><creatorcontrib>Nagai, Michio</creatorcontrib><title>Reflective sheet and transfer film for reflective sheet</title><description>Provided are a reflective sheet including a cholesteric liquid crystal layer and having excellent reflection wavelength range, diffuse reflectivity, reflectivity, hardness, and scratch resistance; and a transfer film for a reflective sheet that is used for the reflective sheet. 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| subjects | DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING |
| title | Reflective sheet and transfer film for reflective sheet |
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