DIAPHRAGM MEMBER, RESERVOIR TANK HAVING DIAPHRAGM MEMBER, AND NEGATIVE PRESSURE BOOSTER HAVING DIAPHRAGM MEMBER

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DIAPHRAGM MEMBER, RESERVOIR TANK HAVING DIAPHRAGM MEMBER, AND NEGATIVE PRESSURE BOOSTER HAVING DIAPHRAGM MEMBER

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NIIHARA KENICHI / KAWAMOTO KEIICHI / UEKI HIROYUKI

PROBLEM TO BE SOLVED: To provide a diaphragm member superior in fatigue characteristic by reducing environmental load, a reservoir tank having the diaphragm, and a negative pressure booster having the diaphragm.SOLUTION: A diaphragm member 40 has an annular peripheral edge portion 46 fixed to a liquid storage chamber 34, and a flexible portion 48 disposed inside the peripheral edge portion 46, and deflected and deformed according to pressure change inside the liquid storage chamber 34. The diaphragm member 40 is composed of a rubber composition including 0.1-60 pts.mass of at least one of oxycellulose fiber and cellulose nanofiber to 100 pts.mass of rubber. The rubber includes at least one of ethylene propylene rubber and styrene butadiene rubber. An average value of fiber diameter of the oxycellulose fiber is 10-30 μm. An average value of fiber diameter of the cellulose nanofiber is 1-200 nm.SELECTED DRAWING: Figure 1

【課題】本発明は、環境負荷を低減しかつ疲労特性に優れたダイヤフラム部材、該ダイヤフラムを有するリザーバタンク及び該ダイヤフラムを有する負圧ブースタを提供する。【解決手段】貯液室３４に固定される環状の周縁部４６と、周縁部４６の内側に貯液室３４の内部における圧力変化に応じて撓み変形する可撓部４８と、を有するダイヤフラム部材４０である。ダイヤフラム部材４０は、ゴム１００質量部に対し、酸化セルロース繊維及びセルロースナノファイバーの少なくとも一方を０．１質量部〜６０質量部含むゴム組成物からなる。ゴムは、エチレン・プロピレンゴム及びスチレン・ブタジエンゴムの内、少なくとも一方を含む。酸化セルロース繊維は、繊維径の平均値が１０μｍ〜３０μｍである。セルロースナノファイバーは、繊維径の平均値が１ｎｍ〜２００ｎｍである。【選択図】図１

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Title :

DIAPHRAGM MEMBER, RESERVOIR TANK HAVING DIAPHRAGM MEMBER, AND NEGATIVE PRESSURE BOOSTER HAVING DIAPHRAGM MEMBER

Additional title:

ダイヤフラム部材、該ダイヤフラム部材を有するリザーバタンク及び該ダイヤフラム部材を有する負圧ブースタ

Contributors:

NIIHARA KENICHI (author) / KAWAMOTO KEIICHI (author) / UEKI HIROYUKI (author)

Publication date :

2017-10-05

Type of media :

Patent

Type of material :

Electronic Resource

Language :

Japanese

Classification :

IPC:

F16J Kolben , PISTONS / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen