HOLLOW PARTICLE, METHOD FOR PRODUCING HOLLOW PARTICLE AND FRICTION MATERIAL CONTAINING HOLLOW PARTICLE

PROBLEM TO BE SOLVED: To provide a hollow particle having high strength, further, when being used for a friction material, sufficiently increasing the porosity of the friction material, and capable of imparting excellent fade resistance and wear resistance, and a method for producing the same.SOLUTI...

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Hauptverfasser:	KIMURA YUHO, OKUMURA NAEKO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ADHESIVES BLASTING BRAKES CHEMISTRY CLUTCHES COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS COUPLINGS FOR TRANSMITTING ROTATION DYES ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INORGANIC CHEMISTRY LIGHTING MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MECHANICAL ENGINEERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES THERMAL INSULATION IN GENERAL WEAPONS
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a hollow particle having high strength, further, when being used for a friction material, sufficiently increasing the porosity of the friction material, and capable of imparting excellent fade resistance and wear resistance, and a method for producing the same.SOLUTION: Provided is a hollow particle made of: a hollow part; and a shell forming the hollowing part. The shell is formed of sulfate, in which the average particle diameter is 3 to 40 μm, Mohs hardness is 1.0 to 4.0, and tap density is 0.4 to 2.2 g/cm3. The sulfate is used as a friction material as at least one kind of barium sulfate and calcium sulfate.SELECTED DRAWING: Figure 1 【課題】高い強度を有するとともに、例えば摩擦材に使用したときに摩擦材の気孔率を十分に高め、優れた耐フェード性及び耐摩耗性を付与し得る、中空粒子及びその製造方法の提供。【解決手段】中空部と該中空部を形成するシェルからなり、該シェルが硫酸塩から形成される中空粒子であり、平均粒子径が３〜４０μｍ、モース硬度が１．０〜４．０、タップ密度が０．４〜２．２ｇ／ｃｍ３。該硫酸塩は硫酸バリウム及び硫酸カルシウムのうち少なくとも１種である摩擦材として用いる中空粒子。【選択図】図１