Nitto-Denko Corporation

Hajime Ooya

Satoru Furuyama

Kei Yoshida

The mask of the present disclosure is adapted to be worn on a face including a main body that covers at least a portion of the face, and the main body includes a resin film having air permeability through the thickness thereof. The resin film is a non-porous film having through holes extending through the thickness of the film. The diameter of the through holes is 0.01 &#x3bc;m or more and 30 &#x3bc;m or less. The density of the through holes in the resin film is 10 holes/cmor more and 1&#xd7;10holes/cmor less. The mask of the present disclosure is completely different in structure from conventional masks, has high flexibility in the design of various properties such as shielding ability, air permeability, transparency, and sound permeability, and is capable, for example, of exhibiting high shielding ability, high air permeability, high transparency, and high sound permeability.

Mask

A gas removal deviceincludes a decompression chamberwith an inletand an outletthrough which a liquid to be degassed flows therein and thereout, and a degassing elementthat is accommodated in the decompression chamberwhile having one end connected to the inletand another end connected to the outlet, and that allows the liquid to be degassed entering into the inletto pass through the degassing element. The degassing elementincludes a tube bundlecomposed of a plurality of flexible gas-permeable tubes, and a tying membertying the plurality of gas-permeable tubesto form the tube bundle. The tube bundleis bent in a shape of coil with multiple turns in such a manner that a portion tied by the tying memberis included in a bent portion BP.

Gas removal device

A degassing apparatus is provided that accomplishes the connecting of a degassing element and a connecting member and/or the joining of a vacuum (reduced-pressure) chamber and the connecting member without using a fastening structure screwed together with the connecting member. A degassing apparatus includes: a reduced-pressure chamber having a through port for flowing a degassing target liquid therethrough; a degassing element, accommodated in the chamber, for passing the liquid therethrough; and a tubular connecting member joined to the chamber at the through port. The degassing element includes a gas-permeable tube, for passing the liquid therethrough, being covered with a joint piece at an end portion of the gas-permeable tube. The degassing element is fixed to the chamber by heat sealing the connecting member and the joint piece together.

Degassing apparatus

A degasifier is provided in which the deterioration in sealing property (deterioration in airtightness) is prevented while sealing members to be placed between a container and covers that compose a decompression chamber can be omitted. A degasifier includes a decompression chamber provided with a container and covers, and a gas-permeable tube. The container is a tubular body extending along the central axis. The covers seal the openings of the ends of the tubular body. The gas-permeable tube is contained in the decompression chamber in such a manner that a liquid to be degassed that has entered from the outside of the decompression chamber flows therethrough and the liquid to be degassed that has flowed therethrough flows out of the decompression chamber. The inner circumference surfaces in the vicinities of the openings of the container each are provided with a first slope that is formed to be tilted at a predetermined angle &#x3b8; with respect to the central axis and to extend away from the central axis toward the opening side of the container. A portion of each of the covers that is in contact with the container is provided with a second slope that is formed to be tilted at the angle &#x3b8; with respect to the central axis and to extend to approach the central axis toward the inner side of the decompression chamber, with the openings being sealed. The openings are sealed with the container and the covers being joined to each other in the state where the first slopes and the second slopes are in contact with each other, respectively.

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Osaka, Japan

Hajime Ooya