Mitsubishi Chemical Corporation

Daichi Okuno

Haruki Koshitouge

A structural body including a plurality of convex-shaped rubber-elastic resonant portions, and a sheet-like support that supports the resonant portions. A specific gravity of the resonant portions is 1.0 g/cmor more and 3.0 g/cmor less, a height of the resonant portions is from 50 μm to 100 mm, and an areal density of the support is 1.0 kg/mor less.

Composition for sound insulating sheet member, sound insulating sheet member, and sound insulating structure body

Provided is a composition for a sound insulating sheet member, a sound insulating sheet member, and a sound insulating structure body with excellent sound insulating performance. A sound insulating structure body including: a plurality of convex-shaped rubber-elastic resonant portions; and a sheet-like support that supports the resonant portions, wherein the resonant portions have a storage modulus G′ obtained from a composite curve of dynamic viscoelasticity according to ISO 6721-4 of 100 MPa or less at 25° C. and 10 kHz, and the areal density of the support is 1.0 kg/mor less.

An optical film production method for suppressing air bubbles in microlenses, comprising rotating a roll die having a plurality of concave-shaped microlens transfer portions on the surface and running a substrate in the rotation direction; supplying an active energy ray-curable composition &#x3b2; onto a coating roll adjacent to the roll die surface, flattening the composition &#x3b2;, coating the flattened composition &#x3b2; on the roll die surface; supplying an active energy ray-curable composition &#x3b1; on the substrate and coating the composition &#x3b1; on a surface of the substrate; associating the compositions &#x3b1; and &#x3b2; between the roll die and the substrate to form a liquid pool; and irradiating a region between the roll die surface and the substrate surface with an active energy ray so the compositions &#x3b1; and &#x3b2; are sandwiched between the roll die surface and the substrate surface to cure the compositions &#x3b1; and &#x3b2;.

Optical film production method, optical film, surface light-emitting body and optical film production device

An optical film has a plurality of aligned convex microlenses, each of which has a region &#x3b1; and a region &#x3b2;, region &#x3b2; forming the outer part of the convex shape of the microlens and positioned so as to cover region &#x3b1;. Both region &#x3b1; and region &#x3b2; contain a resin, and the refractive index of the resin in region &#x3b1; is higher than the refractive index of the resin in region &#x3b2;; region &#x3b2; contains fine particles, and region &#x3b1; contains fine particles, and the content of the fine particles contained in region &#x3b1; is lower than the content of the fine particles contained in region &#x3b2;; or region &#x3b1; contains fine particles, and region &#x3b2; contains fine particles, and the content of the fine particles contained in region &#x3b1; is higher than the content of the fine particles contained in region &#x3b2;.

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Yokohama, Japan

Daichi Okuno