公开(公告)号：US11890845B2

公开(公告)日：2024-02-06

申请号：US17824493

申请日：2022-05-25

Applicant: Toppan Inc.

Inventor： Ryosuke Takahashi ,  Mamiko Sano ,  Hayato Funaki

IPC: B32B3/30 ,  B32B7/022 ,  B32B27/08 ,  B32B27/30

CPC classification number: B32B3/30 ,  B32B7/022 ,  B32B27/08 ,  B32B27/30 ,  B32B2270/00 ,  B32B2307/31 ,  B32B2307/4023 ,  B32B2307/412 ,  B32B2307/718 ,  B32B2307/732 ,  B32B2451/00

Abstract: A decorative sheet comprises a substrate layer; a pattern layer provided on the first front surface of the substrate layer; and a thermoplastic resin layer provided on the second front surface of the pattern layer. A test piece of 8 mm width from the decorative sheet is taken; the storage modulus is measured with an initial chuck distance of 10.77 mm, a start temperature of 30° C., an end temperature of 150° C., a temperature increase rate of 5° C./min, and a measurement frequency of 1.0 Hz. The ratio of the difference between the second storage modulus and a third storage modulus when the decorative sheet changes from the transition region to a rubbery flat region to the difference between a first storage modulus when the environmental temperature is 30° C. and a second storage modulus when the decorative sheet changes from a glassy region to a transition region is 3.5 or less.