Invention Grant
- Patent Title: Decorative sheet
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Application No.: US16939908Application Date: 2020-07-27
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Publication No.: US11597178B2Publication Date: 2023-03-07
- Inventor: Ryosuke Takahashi , Mamiko Sano , Hayato Funaki
- Applicant: TOPPAN PRINTING CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: TOPPAN PRINTING CO., LTD.
- Current Assignee: TOPPAN PRINTING CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JPJP2018-084414 20180425,JPJP2018-191838 20181010,JPJP2018-191839 20181010,JPJP2019-070717 20190402
- Main IPC: B32B3/30
- IPC: B32B3/30 ; B32B7/022 ; B32B27/30 ; B32B27/08

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.
Public/Granted literature
- US11660836B2 Decorative sheet Public/Granted day:2023-05-30
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