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HOLDING SEAL MATERIAL AND METHOD FOR PRODUCING HOLDING SEAL MATERIAL
Provided is a holding seal material including: alumina fibers, wherein the alumina fibers contain 85 to 98 wt % of an alumina component and 15 to 2 wt % of a silica component, the holding seal material has multiple marks formed by needle punching, and in a heat treatment test, a contact pressure of the holding seal material heated at a test temperature of 950° C. is 65 to 99% of a contact pressure of the holding seal material heated at test temperature of 800° C., wherein the heat treatment test includes: a compressing step of disposing the holding seal material between an upper plate and a lower plate and compressing the holding seal material to a gap bulk density (GBD) of 0.3 g/cm3; a heating step of heating, after the compressing step, the compressed holding seal material to a predetermined test temperature at a temperature-increasing rate of 45° C./min and maintaining the holding. seal material at the test temperature for six hours; a releasing step of cooling, after the heating step, the holding seal material to room temperature and releasing the holding seal material to a gap bulk density (GBD) of 0.27 g/cm3; and a cycling step of repeating, after the releasing step, 1000 times the cycle of re-compression of the holding seal material to a gap bulk density (GBD) of 0.3 g/cm3 and re-release of the holding seal material to a gap bulk density (GBD) of 0.27 g/cm3 so as to calculate the contact pressure (kPa) of the holding seal material by dividing the load at the last re-release in the cycling step by the area of the holding seal material.
HOLDING SEAL MATERIAL AND METHOD FOR PRODUCING HOLDING SEAL MATERIAL
Provided is a holding seal material including: alumina fibers, wherein the alumina fibers contain 85 to 98 wt % of an alumina component and 15 to 2 wt % of a silica component, the holding seal material has multiple marks formed by needle punching, and in a heat treatment test, a contact pressure of the holding seal material heated at a test temperature of 950° C. is 65 to 99% of a contact pressure of the holding seal material heated at test temperature of 800° C., wherein the heat treatment test includes: a compressing step of disposing the holding seal material between an upper plate and a lower plate and compressing the holding seal material to a gap bulk density (GBD) of 0.3 g/cm3; a heating step of heating, after the compressing step, the compressed holding seal material to a predetermined test temperature at a temperature-increasing rate of 45° C./min and maintaining the holding. seal material at the test temperature for six hours; a releasing step of cooling, after the heating step, the holding seal material to room temperature and releasing the holding seal material to a gap bulk density (GBD) of 0.27 g/cm3; and a cycling step of repeating, after the releasing step, 1000 times the cycle of re-compression of the holding seal material to a gap bulk density (GBD) of 0.3 g/cm3 and re-release of the holding seal material to a gap bulk density (GBD) of 0.27 g/cm3 so as to calculate the contact pressure (kPa) of the holding seal material by dividing the load at the last re-release in the cycling step by the area of the holding seal material.
HOLDING SEAL MATERIAL AND METHOD FOR PRODUCING HOLDING SEAL MATERIAL
OKABE TAKAHIKO (author) / HATANAKA KIYONARI (author)
2018-10-04
Patent
Electronic Resource
English
IPC:
F01N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
,
Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein
/
B01D
SEPARATION
,
Trennen
/
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
C04B
Kalk
,
LIME
/
D04H
Herstellen von flächigem Textilgut, z.B. aus Fasern oder fadenförmigem Material
,
MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
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