Sound insulation sheet, manufacturing method thereof, and sound insulation structure
AssigneeMitsubishi Chemical Corporation
InventorsHaruki Koshitouge, Shogo Koga, Naoyuki Uchida, Kazuma Inoue, Masanari Nakayama, Yuya Saito
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Abstract
To provide a sound insulation sheet member which is excellent in sound insulation performance in a low frequency band and which has a compact configuration. A sound insulation sheet member 1 including a substrate 2 and a concavo-convex structure 3 placed on at least one surface of the substrate 2, in which the concavo-convex structure 3 is provided by repeatedly arranging a plurality of units each defined as a concavo-convex unit shape 4 including a linear convex portion 5, in one direction at substantially constant intervals on the surface of the substrate 2.
Claims28
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.
Dependencies are inferred from the claim text.