Winding body

• Main Authors: MORIMOTO KENSUKE, HATANAKA NOBUYUKI, NADA TAKAYUKI
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2024
• Subjects: ADVERTISING; CRYPTOGRAPHY; DISPLAY; DISPLAYING; EDUCATION; LABELS OR NAME-PLATES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SEALS; SIGNS

The invention relates to a wound body. Provided is a wound body capable of reducing variations in optical characteristics of individual sheets cut from a long laminate. The wound body is obtained by winding a laminate including a substrate layer and a light-absorbing anisotropic layer formed on the substrate layer into a roll. The light-absorbing anisotropic layer is formed from a composition containing a dichroic dye and a liquid crystalline compound, has an absorption axis in a direction perpendicular to a plane of the light-absorbing anisotropic layer, and satisfies the relationship of formula (I). Axmax (z = 50 DEG) and Axmin (z = 50 DEG) are respectively the maximum value and the minimum value when the absorbance Ax (z = 50 DEG) is measured at 10 measurement points set on the light-absorbing anisotropic layer included in the laminate, and Axmax (z = 50 DEG)/Axmin (z = 50 DEG) < = 1.12 (I). 本发明涉及卷绕体。提供能够降低从长条状的层叠体切出的单片体的光学特性的偏差的卷绕体。卷绕体是将包含基材层和形成于基材层上的光吸收各向异性层的层叠体卷绕成卷状而得到的。光吸收各向异性层由包含二向色性色素和液晶性化合物的组合物形成，在与