Inorganic fiber paper and method of producing the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
D21H-013/36
D21H-013/40
D21H-027/00
출원번호
US-0064639
(2011-04-05)
등록번호
US-8641868
(2014-02-04)
우선권정보
JP-2011-077939 (2011-03-31)
발명자
/ 주소
Mihara, Tetsuya
Yonaiyama, Ken
Ishihara, Tetsuya
Kishiki, Tomohiko
출원인 / 주소
Nichias Corporation
대리인 / 주소
Steptoe & Johnson LLP
인용정보
피인용 횟수 :
0인용 특허 :
21
초록▼
Inorganic fiber paper includes first biosoluble inorganic fibers having an average fiber diameter of 3 to 7 μm, second biosoluble inorganic fibers having an average fiber diameter of 2 to 3 μm, and a binder, the average fiber diameter of the second biosoluble inorganic fibers being smaller than that
Inorganic fiber paper includes first biosoluble inorganic fibers having an average fiber diameter of 3 to 7 μm, second biosoluble inorganic fibers having an average fiber diameter of 2 to 3 μm, and a binder, the average fiber diameter of the second biosoluble inorganic fibers being smaller than that of the first biosoluble inorganic fibers.
대표청구항▼
1. Gasket or sealing paper, consisting essentially of: first biosoluble inorganic fibers having an average fiber diameter of 3 μm to 7 μm,second biosoluble inorganic fibers having an average fiber diameter of 2 μm to 3 μm, the average fiber diameter of the second biosoluble inorganic fibers being sm
1. Gasket or sealing paper, consisting essentially of: first biosoluble inorganic fibers having an average fiber diameter of 3 μm to 7 μm,second biosoluble inorganic fibers having an average fiber diameter of 2 μm to 3 μm, the average fiber diameter of the second biosoluble inorganic fibers being smaller than that of the first biosoluble inorganic fibers, anda binder, wherein when compressed to 50% of its uncompressed thickness, and subjected to an air pressure differential of 30 KPa, the flow rate of air through the compressed gasket or sealing paper is less than 15 l/min. 2. The gasket or sealing paper according to claim 1, wherein the first biosoluble inorganic fibers have an average fiber diameter of 3.1 μm to 4.0 μm. 3. The gasket or sealing paper according to claim 1, comprising 30 mass % to 90 mass % of the first biosoluble inorganic fibers, and 10 mass % to 70 mass % of the second biosoluble inorganic fibers. 4. The gasket or sealing paper according to claim 3, comprising 40 mass % to 80 mass % of the first biosoluble inorganic fibers, and 20 mass % to 60 mass % of the second biosoluble inorganic fibers. 5. The gasket or sealing paper according to claim 1, wherein the biosoluble inorganic fibers comprise 50 mass % to 82 mass % of SiO2, Al2O3, ZrO2, and TiO2 in total, and 18 mass % to 50 mass % of CaO and MgO in total. 6. The gasket or sealing paper according to claim 1, wherein the first biosoluble inorganic fibers comprise 50 mass % to 82 mass % of SiO2, and 10 mass % to 43 mass % of CaO and MgO in total. 7. The gasket or sealing paper according to claim 1, wherein the second biosoluble inorganic fibers are rock wool. 8. The gasket or sealing paper according to claim 1, wherein the second biosoluble inorganic fibers comprise 35 mass % to 45 mass % of SiO2, 1 mass % to 10 mass % of MgO, 20 mass % to 40 mass % of CaO, and 10 mass % to 20 mass % of Al2O3. 9. The gasket or sealing paper according to claim 1, wherein the first biosoluble inorganic fibers are biosoluble inorganic fibers that have been heated. 10. The gasket or sealing paper according to claim 9, wherein the first biosoluble inorganic fibers have been heated at 400° C. to 1300° C. 11. The gasket or sealing paper according to claim 1, wherein all fibers in the paper consist only of fibers which are either a first biosoluble inorganic fiber or a second biosoluble inorganic fiber. 12. The gasket or sealing paper according to claim 1, wherein the first biosoluble inorganic fibers have an SiO2 content of 58 to 82 mass % and the second biosoluble inorganic fibers have an SiO2 content of 30 to 50 mass %. 13. The gasket or sealing paper according to claim 1 which has a thickness of 0.1 to 8 mm. 14. The gasket or sealing paper according to claim 1, wherein the first biosoluble fibers are SiO2/CaO fibers having an SiO2 content of 50 to 82 mass %, a CaO content of 5 to 34 mass % and an MgO content of 1 mass % or less, or SiO2/MgO fibers having an SiO2 content of 50 to 82 mass %, and MgO content of 1 to 20 mass %, and a CaO content of 1 to 9 mass %. 15. The gasket or sealing paper according to claim 14, wherein the SiO2/CaO fibers and SiO2/MgO fibers have an Al2O3 content up to 3 mass %. 16. The inorganic fiber paper according to claim 1, wherein the first and second bio-soluble fibers are of different chemical compositions. 17. The gasket or sealing paper according to claim 1, wherein the flow rate is 14 l/min or less. 18. The gasket or sealing paper according to claim 1, wherein the flow rate is 14 l/min or less, and the gasket or sealing paper has a restoration ratio of 52% or more, as determined by a method comprising:measuring the thickness of a specimen of said gasket or sealing paper before compression and heating, then compressing the specimen until the thickness is reduced by 50% of the thickness before compression and heating, then holding the compressed specimen and heating it at a temperature of 500±15° C. for 3 hours, then removing the specimen from compression and heating, and measuring the thickness, 0.5 hours thereafter, and calculating the restoration ratio (%) of the thickness after compression and heating to the thickness before compression and heating. 19. A method of producing gasket or sealing paper according to claim 1, said method comprising;making a composition for paper making by: preparing first biosoluble inorganic fibers having an average fiber diameter of 3 μm to 7 μm,preparing second biosoluble inorganic fibers having an average fiber diameter of 2 μm to 3 μm, the average fiber diameter of the second biosoluble inorganic fibers being smaller than that of the first biosoluble inorganic fibers, andmixing said first and second biosoluble inorganic fibers with a binder;and producing a paper from said composition.
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