Nitto-denko Corporation

Bunta Hirai

Yuichi Abe

Yosuke Sugaya

Takeo Inoue

Tamao Fukushima

Masaaki Mori

Hajime Yamamoto

Satoru Furuyama

Tomohiro Kontani

The waterproof member of the present disclosure is a waterproof member comprising a waterproof membrane configured to prevent entry of water while permitting sound and/or gas to pass therethrough, and a support layer having air permeability in a thickness direction thereof, wherein the member has a joining region where the waterproof membrane and the support layer are joined, and a non-joining region where the waterproof membrane and the support layer are spaced apart from each other, the non-joining region is surrounded by the joining region when viewed in a direction perpendicular to a main surface of the waterproof membrane, and a thickness of the support layer in the non-joining region is less than 100 μm. The waterproof member of the present disclosure is, for example, a waterproof sound-transmitting member including a waterproof sound-transmitting membrane and a support layer for the membrane and having improved sound transmission characteristics.

Waterproof member and electronic device

A protective cover member includes a laminate including: a protective membrane having a shape configured to cover an opening when the protective cover member is placed on the face of an object; a substrate film joined to the protective membrane; and a first adhesive layer configured to fix the protective cover member to the face, wherein an outer peripheral surface of the protective cover member has a step in a laminating direction of the laminate, a first portion of the protective cover member protrudes at the step more outward than a second portion of the protective cover member does when the protective cover member is placed on the face, the first portion being positioned farther from the face than the step, the second portion being positioned closer to the face than the step, and the protective membrane and the substrate film are positioned in the first portion.

Protective cover member and member supplying sheet including the same

The waterproof sound-transmitting member of the present disclosure includes: a waterproof sound-transmitting membrane configured to prevent entry of water while permitting sound to pass therethrough, and a support layer joined to a main surface of the waterproof sound-transmitting membrane. The waterproof sound-transmitting membrane has an air permeability of 10,000 seconds/100 mL or more as expressed by Gurley number, the support layer includes a resin foam material and has a through hole extending in a thickness direction thereof and serving as a path for sound transmitted through the waterproof sound-transmitting membrane, and a side air permeability of the support layer between the through hole and an outer peripheral side surface of the support layer when the support layer is compressed in the thickness direction thereof at a compression ratio of 20% is 0.1 mL/(min&#xb7;mm) or more as a value per unit volume of the support layer.

Waterproof sound-transmitting member and electronic device provided therewith

The waterproof member of the present disclosure includes a waterproof membrane configured to prevent entry of water while permitting sound and/or gas to pass therethrough, and a support layer having air permeability in a thickness direction thereof. The waterproof member has a joining region where the waterproof membrane and the support layer are joined, and a non-joining region where the waterproof membrane and the support layer are spaced apart from each other. The non-joining region is surrounded by the joining region when viewed in a direction perpendicular to a main surface of the waterproof membrane. A thickness of the support layer in the non-joining region is 500 &#x3bc;m or less. A spacing distance between the waterproof membrane and the support layer in the non-joining region is 150 &#x3bc;m or less. An air resistance in an in-plane direction of the support layer is greater than 80,000 seconds/100 mL.

An acoustic resistor for use in an audio device includes a resin film having air permeability in a thickness direction of the resin film, and the resin film is a non-porous film having through holes formed to extend straight through the resin film in the thickness direction. This acoustic resistor is used in an audio device including: a transducing part that performs conversion between sound and an electrical signal and that includes an acoustic element; a housing enclosing the transducing part and having at least one opening; and a passage for gas that is present inside the housing and communicates with the opening and in which the acoustic element is placed. The acoustic resistor is placed between the opening and the acoustic element in the passage. The variation in properties of the acoustic resistor of the present disclosure can be made smaller than that of conventional acoustic resistors.

Growing community of inventors

Osaka, Japan

Bunta Hirai