Nitto-denko Corporation

Tomoaki Hishiki

Masayuki Hodono

Yuka Sekiguchi

Saori Yamamoto

Yusuke Komoto

Kohei Oto

Takahisa Konishi

Naoki Nagaoka

Ryohei Oban

Tomoko Sudo

Yusuke Kamano

Takahiko Ito

Shinya Hashiguchi

Masayoshi Nakamura

The present invention provides a method for manufacturing an optical resin composition that is less colored and that has a sufficiently low water absorbability. The optical resin composition manufacturing method according to the present invention includes performing a heat treatment of a fluorine-containing polymer under an atmosphere having a water vapor concentration of 100 volppm or less, the fluorine-containing polymer being obtained by polymerization of a monomer group including a fluorine-containing compound having a carbon-carbon double bond using an organic peroxide. In the optical resin composition manufacturing method, for example, the heat treatment causes thermal decomposition of a terminal group of the fluorine-containing polymer and volatilization of a low-molecular compound generated by the thermal decomposition.

Optical resin composition manufacturing method and optical resin composition

A piezoelectric speaker () includes a piezoelectric film (), a first joining layer (), and an interposed layer (). The piezoelectric film () includes a first electrode (), a second electrode (), and a piezoelectric body () sandwiched by the first electrode () and the second electrode (). The first joining layer () is a layer having pressure-sensitive adhesiveness or adhesiveness. The interposed layer () is disposed between the piezoelectric film () and the first joining layer (). Both principal surfaces of the piezoelectric film () vibrate up and down as a whole.

Piezoelectric speaker

A sound reducing system () includes at least one sound reducing speaker for radiating a sound wave for sound reduction. The at least one sound reducing speaker includes a piezoelectric speaker (). The piezoelectric speaker () includes a piezoelectric film (), a fixing face () in contact with a support supporting the piezoelectric speaker (), and a film holding portion () disposed between the piezoelectric film () and the fixing face (). (i) The film holding portion () includes a pressure-sensitive adhesive layer and the fixing face () is formed of a surface of the pressure-sensitive adhesive layer and/or (ii) the film holding portion () includes a porous body layer.

Sound reducing system

A piezoelectric speaker () includes: a piezoelectric film (); a fixing face () for fixing the piezoelectric film () to a support; and an interposed layer () disposed between the piezoelectric film () and the fixing face (). The interposed layer () has a holding degree of 5×10N/mor less.

The present invention provides a foam body suitable for producing a cultured meat having a good texture. The foam body of the present invention includes alginic acid and/or an alginate. The foam body has an elastic modulus M, as determined by a test, of 8&#xd7;10Pa or less. In the test, the foam body is immersed in 22&#xb1;3&#xb0; C. water for 4 hours to prepare a specimen having a post-immersion thickness of 5&#xb1;1 mm. Stress and strain caused in the specimen are measured by applying a load to the specimen for 5 seconds to compress the specimen in a thickness direction at 0.5 mm/sec. A stress caused in the specimen when the specimen is compressed by 10% of an initial thickness is determined, and a value obtained by dividing the stress by a corresponding strain is determined as the elastic modulus M.

Foam body and method for manufacturing the same

A piezoelectric speaker-forming laminate () includes: a piezoelectric film (); a pressure-sensitive adhesive face (); an interposed layer () being a porous body layer and/or a resin layer disposed between the piezoelectric film () and the pressure-sensitive adhesive face (); and a release layer () joined to the pressure-sensitive adhesive face (). The pressure-sensitive adhesive face () is disposed in such a manner that at least a portion of the piezoelectric film () overlaps the pressure-sensitive adhesive face () when the piezoelectric film () is viewed in plan. The piezoelectric film () and the interposed layer () are allowed to be fixed to a support () as a piezoelectric speaker or a portion of a piezoelectric speaker by sticking the pressure-sensitive adhesive face () from which the release layer () has been removed to the support ().

Growing community of inventors

Osaka, Japan

Tomoaki Hishiki