Lead for low load


PURPOSE: To obtain a lead for a load, containing carbon and boron nitride as main materials, having a specific peak to X-ray irradiation perpendicular to the extrusion axis direction, usable by mounting on a plotter for writing under the low load and giving clear scripts having improved erasability. CONSTITUTION: A lead obtained by blending (A) carbon as a binder, e.g. carbon prepared by calcining a carbonizable organic compound such as natural resin, etc., and (B) boron nitride as a lubricant as main materials and molding the resultant blend to give ≥40 ratio of the peak height of (002) plane of hexagonal boron nitride to the peak height of (100) plane in an X-ray diffraction obtained by irradiating X-rays perpendicularly to the extrusion axis direction of the lead. 50W300pts.wt. component (B) is preferably blended with 100pts.wt. carbonizable organic compound. COPYRIGHT: (C)1988,JPO&Japio




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Patent Citations (2)

    Publication numberPublication dateAssigneeTitle
    JP-S4874321-AOctober 06, 1973
    JP-S6067578-AApril 17, 1985Pilot Precision Co LtdPencil lead

NO-Patent Citations (0)


Cited By (4)

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    EP-1826253-A2August 29, 2007J.S. Staedtler GmbH & Co KGColour cartridge for writing, drawing or painting devices
    EP-1826253-A3July 02, 2008J.S. Staedtler GmbH & Co KGColour cartridge for writing, drawing or painting devices
    JP-2007231271-ASeptember 13, 2007Js Staedtler Gmbh & Co Kg, ヨット・エス・ステットラー・ゲゼルシャフト・ミツト・ベシュレンクテル・ハフツング・ウント・コンパニー・コマンデイトゲゼルシヤフトColored lead for writing, drawing or marking tool
    JP-4682165-B2May 11, 2011ヨット・エス・ステットラー・ゲゼルシャフト・ミツト・ベシュレンクテル・ハフツング・ウント・コンパニー・コマンデイトゲゼルシヤフト筆記、図画またはマーク用具のための着色芯