US 12,236,929 B2
Sound insulation sheet, manufacturing method thereof, and sound insulation structure
Haruki Koshitouge, Tokyo (JP); Shogo Koga, Tokyo (JP); Naoyuki Uchida, Tokyo (JP); Kazuma Inoue, Tokyo (JP); Masanari Nakayama, Tokyo (JP); and Yuya Saito, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Sep. 27, 2021, as Appl. No. 17/485,730.
Application 17/485,730 is a continuation of application No. PCT/JP2020/014435, filed on Mar. 30, 2020.
Claims priority of application No. 2019-064117 (JP), filed on Mar. 28, 2019; and application No. 2019-182806 (JP), filed on Oct. 3, 2019.
Prior Publication US 2022/0028363 A1, Jan. 27, 2022
Int. Cl. G10K 11/162 (2006.01); B29C 35/08 (2006.01); E04B 1/84 (2006.01)
CPC G10K 11/162 (2013.01) [B29C 35/0805 (2013.01); E04B 1/8409 (2013.01); E04B 2001/8414 (2013.01); E04B 2001/8452 (2013.01); E04B 2103/04 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A sound insulation sheet comprising a concavo-convex structure on at least one surface of a sheet-shaped substrate, wherein
the concavo-convex structure comprises a plurality of rows of continuous convex protrusions from a sheet surface of the substrate separated by rows of concave portions,
the rows of continuous convex protrusions are linearly arranged in one direction with respect to one another and do not overlap,
each row of continuous convex protrusion has a length in a longitudinal direction and a width in a transverse direction wherein a ratio of a maximum length in the longitudinal direction to the width in the transverse direction is 35 or more,
a shape of a transverse section of the rows of continuous convex protrusions is selected from the group consisting of a square shape, a rectangular shape, a trapezoidal shape, a semicircular shape and an oval shape, and
the substrate has a Young's modulus of 1 GPa or more and 10 GPa or less.