Nitto-denko Corporation

Teppei Tezuka

Youzou Yano

Tomoyuki Kasagi

Kazuhiro Omura

Kou Uemura

Kouji Furuuchi

Yusuke Nakayama

Daisuke Kitagawa

Satoshi Nishiyama

Akira Miyagaki

Koji Furuuchi

Yuuzou Muraki

A ventilation assembly of the present disclosure includes: an internal member being a tubular body having an opening at a first end portion and an opening at a second end portion; a gas-permeable membrane covering the opening at the first end portion of the internal member; and an external member being a tubular body having a bottom, the external member being joined to the internal member with the internal member inserted in the interior of the external member from the first end portion side, wherein the ventilation assembly is to be fixed to the projection of the housing with the projection inserted in the opening at the second end portion of the internal member to make an inner peripheral surface of the internal member and an outer peripheral surface of the projection abut each other, the ventilation assembly has a second space serving as a ventilation path connecting the gas-permeable membrane and the outside of the ventilation assembly in at least one selected from the inside of the internal member, the inside of the external member, and an interspace between the internal member and the external member joined together, and a total length of a height of the internal member and a shortest length in the second space from an outer periphery of the internal member at the first end portion to an end portion of the ventilation path on the outside side is 6.0 mm or more and 20 mm or less. The ventilation assembly of the present disclosure is excellent in moisture permeation performance.

Ventilation assembly and ventilation housing

Provided is an internal pressure adjustment member to be attached to an outer surface of a housing, the member having high air permeability even when a differential pressure that can be generated between the inside and the outside of a housing to which the internal pressure adjustment member is attached is small, and inhibiting damage to the member and a reduction in the air permeability of the member due to coming soil and mud. The internal pressure adjustment member includes: a filter portion including a net-like or mesh-like support layer and first and second porous polytetrafluoroethylene (PTFE) membranes laminated on the support layer such that the support layer is interposed therebetween, the first porous PTFE membrane being exposed on one surface of the filter portion, the second porous PTFE membrane being exposed on another surface of the filter portion; and an adhesive portion, formed on the one surface of the filter portion, for attaching the filter portion to the outer surface of the housing. The first porous PTFE membrane and the second porous PTFE membrane each have an average pore diameter of 2.0 &#x3bc;m or more, the filter portion has a thickness of 140 &#x3bc;m or less, and the filter portion has a density of 0.60 g/cmor less.

Infernal pressure adjustment member and electrical component for transport equipment

A porous polytetrafluoroethylene (PTFE) membrane of the present disclosure has a water vapor permeability, as measured according to Japanese Industrial Standard (JIS) L 1099 (method B-1), of 150000 g/(m&#xb7;day) or more in a thickness direction of the membrane. The porous PTFE membrane of the present disclosure, when attached as a waterproof air-permeable membrane to a housing of an electrical component or electrical device, allows water vapor residing inside the housing to be quickly discharged out of the housing.

Porous polytetrafluoroethylene membrane, and waterproof air-permeable membrane and waterproof air-permeable member including the same

A porous polytetrafluoroethylene (PTFE) membrane of the present disclosure is a membrane having an average fibril length of 50 &#x3bc;m or more, having an average node length 5 or more times larger than the average fibril length, and having an average node area ratio of 5% or less. The porous PTFE membrane of the present disclosure, when attached as a waterproof air-permeable membrane to a housing of an electrical component or electrical device, allows water vapor residing inside the housing to be quickly discharged out of the housing.

A holding member mounted to the case including the internal space, a holding member including the ventilation hole that provides ventilation between the internal space and the external space; a humidity-conditioning member provided midway in the ventilation hole of the holding member and absorbing water vapor; and a ventilation filter provided to the holding member, a ventilation filter being closer to the external space than the humidity-conditioning member is, a ventilation filter being permeable to a gas and preventing a liquid and a sold from entering the internal space.

Ventilation and humidity-conditioning unit and apparatus

A lamp chamber () includes: a first lamp chamber (A) located in a forward direction from a first reference plane (P) and inwardly of a second reference plane (P) in a width direction of a vehicle; and a second lamp chamber (B) located in a rearward direction from the first reference plane (P) and outwardly of the second reference plane (P) in the width direction of the vehicle. A headlamp () includes: a first vent member () attached to a first opening portion (A) provided in a region of a housing () facing the first lamp chamber (A); and a second vent member () attached to a second opening portion (B) provided in a region of the housing () facing the second lamp chamber (B). The vent members () each include a waterproof air-permeable body. The air permeability value of the first vent member () is higher than the air permeability value of the second vent member ().

Vehicle lamp

A vehicle lamp () includes a light source (), a lens (), a housing (), and a vent portion (). The housing () is combined with the lens () to form a lamp space () in which the light source () is disposed. The lamp space () includes a narrow gap region () having a width ofmm or less between the lens () and the housing (). This width corresponds to the distance between them. The vent portion () is provided on the housing () at a position facing the narrow gap region ().

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Osaka, Japan

Teppei Tezuka