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1. 发明专利

JP2003160780A FRICTION MATERIAL 审中-公开
公开(公告)号：JP2003160780A
公开(公告)日：2003-06-06
申请号：JP2001359341
申请日：2001-11-26
申请人： AKEBONO RES & DEV CENTRE
发明人： MORITA MASAYUKI , KUSAKA SATOSHI , SASAKI YOSUKE
IPC分类号： F16D69/02 , C09K3/14
摘要： PROBLEM TO BE SOLVED: To provide a friction material good in facing performance and little in environmental load. SOLUTION: This friction material comprises a fibrous base material, a friction adjusting material, a binder and an inorganic filler, where at least one calcined bone powder among livestock and fish is formulated as a part of the inorganic filler. Preferably, the calcined bone powder is formulated by 5 to 65 wt.% in the whole friction material. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2002285462A METHOD OF MIXED FIBRILLATION FOR FIBERS 失效
公开(公告)号：JP2002285462A
公开(公告)日：2002-10-03
申请号：JP2001085297
申请日：2001-03-23
申请人： AKEBONO RES & DEV CENTRE
发明人： KUSAKA SATOSHI , SASAKI YOSUKE
IPC分类号： D06C11/00 , D04H1/50
摘要： PROBLEM TO BE SOLVED: To obtain a fibrillated pulp mixture of plural kinds of organic fibers in a homogeneously mixed state. SOLUTION: This method of mixed fibrillation for fibers previously mixes the plural kinds of organic fibers in a predetermined ratio and then fibrillates the mixture.

3. 发明专利

JP2001303026A REINFORCING FIBER FOR FRICTION MATERIAL AND METHOD FOR PRODUCING THE SAME 失效
公开(公告)号：JP2001303026A
公开(公告)日：2001-10-31
申请号：JP2000121214
申请日：2000-04-21
申请人： AKEBONO RES & DEV CENTRE
发明人： KUSAKA SATOSHI
IPC分类号： F16D69/02 , C08J5/14 , C09K3/14 , C09K3/16 , D06M13/463
摘要： PROBLEM TO BE SOLVED: To provide reinforcing fibers which are used for friction materials and inhibit the generation of static electricity on the opening of aramid pulp to prevent the fibers from scattering and adhering to surroundings, thereby improving workability and fiber openability. SOLUTION: The reinforcing fibers for friction materials, characterized by adhering an antistatic agent solution containing a surfactant, an antistatic agent aqueous emulsion containing a surfactant emulsified and dispersed therein, or both the solution and the emulsion to aramid pulp and then opening the aramid pulp.

4. 发明专利

JPH09302105A FRICTIONAL MATERIAL 失效
公开(公告)号：JPH09302105A
公开(公告)日：1997-11-25
申请号：JP11647396
申请日：1996-05-10
申请人： RIKAGAKU KENKYUSHO , AKEBONO RES & DEV CENTRE
发明人： DOI YOSHIHARU , KUSAKA SATOSHI , KIMURA SHIGEYUKI , IMAMURA AKIRA
IPC分类号： F16D69/02 , C08J5/14 , C08L1/02 , C08L101/00 , C08L101/16 , C09K3/14
摘要： PROBLEM TO BE SOLVED: To obtain a frictional material for brakes, etc., excellent in physical properties such as coefficient of friction and abrasion wear as well as biodegradability and hardly having bad influence upon natural environment, by using a bacterial cellulose as a fiber-reinforcing agent. SOLUTION: This frictional material consists essentially of (A) a thermosetting resin binder, (B) a fiber reinforcing material, (C) an inorganic filler and (D) an organic friction controller and a bacterial cellulose is used as at least a part of the component B. Furthermore, a content of the collulose is 1-35wt.% based on total amount of the frictional material and the frictional material contains preferably 5-25wt.% component A, 10-50wt.% component B, 20-70wt.% component C and 5-25wt.% component D and the cellulose is obtained by culturing a bacterium having bacterial cellulose-producing ability, synthesizing gel-like cellulose fiber in a bacterial cell body and discharging the fiber to the outside of the cell body.

5. 发明专利

JP2003145568A DEGASSING METHOD IN PROCESS FOR THERMOFORMING FRICTION MATERIAL 审中-公开
公开(公告)号：JP2003145568A
公开(公告)日：2003-05-20
申请号：JP2001344466
申请日：2001-11-09
申请人： AKEBONO BRAKE IND , AKEBONO RES & DEV CENTRE
发明人： SASAKI YOSUKE , ARAI KATSUO , KUSAKA SATOSHI , KURIHARA SEI , MIYAGI KOICHI
IPC分类号： F16D69/00 , B29C43/02 , B29C43/36 , B29C43/52 , B29L31/16
摘要： PROBLEM TO BE SOLVED: To provide a degassing method for preventing the occurrence of defective molding such as cracks and blisters and a method for thermoforming a friction material which can obtain the friction material excellent in quality at a high temperature in a short time. SOLUTION: In a method for producing the friction material in which the preliminary molding of the friction material is thermoformed by using a mold for thermoforming the friction material comprising a press mold, a middle mold, and a pressurization mold, in a degassing method in a process for thermoforming the friction material, the middle parts of the press mold and the middle mold are manufactured from a material having heat conductivity higher than that of the other parts. During the thermoforming, the preliminary molding is heated so that a part to be finally cured is concentrated to the side contacting the middle mold, and gas generated from the preliminary molding by the thermoforming is discharged outside the mold from a position contacting the final curing part of the preliminary molding through a degassing passage opened to the inner surface of the middle mold.

6. 发明专利

JP2003127155A METHOD FOR DEGASSING FRICTION MATERIAL IN THERMOFORMING PROCESS 审中-公开
公开(公告)号：JP2003127155A
公开(公告)日：2003-05-08
申请号：JP2001326416
申请日：2001-10-24
申请人： AKEBONO RES & DEV CENTRE
发明人： SASAKI YOSUKE , ARAI KATSUO , KUSAKA SATOSHI , KURIHARA SEI
IPC分类号： F16D69/00 , B29C43/02 , B29C43/36 , B29C43/52 , B29L31/16
摘要： PROBLEM TO BE SOLVED: To provide a degassing method for preventing the occurrence of defective molding such as a crack and a blister and a thermoforming method for friction material which can obtain the friction material excellent in quality at a high temperature in a short time. SOLUTION: In the method for degassing the friction material in a thermoforming process, in a method for producing the material in which a preliminary molding of a raw material for the material is thermoformed by using a mold for thermoforming the material comprising a press mold, a middle mold, and a pressurization mold, temperature differences are formed in the press mold and the pressurization mold, a part in which the preliminary molding is last cured during thermoforming is biased toward the press mold or the pressurization mold, and a projection having a vent passage which is inserted into the final curing part and connected to the outside is formed in the press mold or the pressurization mold corresponding to the final curing part so that gas can be discharged from the final curing part.

7. 发明专利

JP2002167573A FRICTION MATERIAL UTILIZING ARAMID FIBER 失效
公开(公告)号：JP2002167573A
公开(公告)日：2002-06-11
申请号：JP2000367234
申请日：2000-12-01
申请人： AKEBONO BRAKE IND , AKEBONO RES & DEV CENTRE
发明人： KUSAKA SATOSHI , YANAGI MICHINORI , SASAKI YOSUKE
IPC分类号： F16D69/02 , C08J5/14 , C08L77/10 , C08L87/00 , C09K3/14
摘要： PROBLEM TO BE SOLVED: To obtain a friction material improved in frictional characteristics within the service temperature range of a brake, that is, between about 100-250 deg.C, by combining three types of aramid fibers while taking advantages of their unique characteristics. SOLUTION: The friction material comprises a reinforcing fiber, a friction modifier and a binder, where a mixture of a para-aramid fiber with a meta- aramid fiber is compounded as the reinforcing fiber. Otherwise, the friction material comprises a reinforcing fiber, a friction modifier and a binder, where a mixture of a para-aramid fiber and/or a meta-aramid fiber with a meta/para- aramid fiber is compounded as the reinforcing fiber.

8. 发明专利

JP2002020928A ARAMID HOLLOW FIBER AND METHOD FOR PRODUCING THE SAME 失效
公开(公告)号：JP2002020928A
公开(公告)日：2002-01-23
申请号：JP2000203929
申请日：2000-07-05
申请人： AKEBONO RES & DEV CENTRE
发明人： KUSAKA SATOSHI
IPC分类号： D01F6/60
摘要： PROBLEM TO BE SOLVED: To obtain an aramid hollow fiber having a strength sufficiently withstanding practical use in spite of a thin film thickness and to provide a method for producing the aramid hollow fiber. SOLUTION: This aramid hollow fiber is characterized in that the hollow fiber is composed of a hollow filamentous material having an annular cross section. The method for producing the aramid hollow fiber is characterized by dissolving an aramid in an inorganic acid solvent, stirring the resultant solution, then separating undissolved particles and carrying out wet spinning of a clear solution as a spinning solution.

9. 发明专利

JP2003161339A FRICTION MATERIAL 审中-公开
公开(公告)号：JP2003161339A
公开(公告)日：2003-06-06
申请号：JP2001359340
申请日：2001-11-26
申请人： AKEBONO RES & DEV CENTRE
发明人： MORITA MASAYUKI , KUSAKA SATOSHI , SASAKI YOSUKE
IPC分类号： F16D69/02 , C09K3/14
摘要： PROBLEM TO BE SOLVED: To provide a friction material capable of reducing noise occurrence, with good fading characteristics. SOLUTION: The friction material comprises fiber base material, friction adjusting material, binder, and inorganic filler. It contains the powder of calcium carbonate which is acquired by mechanically crushing a raised/weathered hermatype as one component of the inorganic filler. The powder of calcium carbonate is preferred to be contained in the friction material by 5-65 wt.%. COPYRIGHT: (C)2003,JPO

10. 发明专利

JP2003145565A METHOD FOR PRODUCING FRICTION MATERIAL 审中-公开
公开(公告)号：JP2003145565A
公开(公告)日：2003-05-20
申请号：JP2001344465
申请日：2001-11-09
申请人： AKEBONO RES & DEV CENTRE
发明人： KUSAKA SATOSHI , KURIHARA SEI , SASAKI YOSUKE
IPC分类号： F16D69/00 , B29C43/14 , B29L31/16
摘要： PROBLEM TO BE SOLVED: To provide a thermoforming method for a friction material which can prevent the occurrence of defective molding such as cracks and blisters, obtain a friction material excellent in quality, and improve the productivity of the friction material by curtailing the length of time for a thermoforming process. SOLUTION: A method for producing the friction material includes the thermoforming process in which the preliminary molding of the friction material is thermoformed at a prescribed temperature under a prescribed pressure in a thermoforming mold, pressurization and pressure reduction are repeated alternately prescribed times, and gas generated from the preliminary molding is subjected to degassing treatment. The degassing treatment process includes the first pressure reduction period in which the pressure is reduced from a molding pressure to the vapor pressure of the gas generated from the preliminary molding within 1.5 s and the second pressure reduction period in which the pressure is reduced to the atmospheric pressure during a time at least twice as long as the first pressure reduction period.

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