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FIRED PENCIL LEAD

机译:铅笔头

摘要

PROBLEM TO BE SOLVED: To provide a fired pencil lead having good balance between bending strength and the density of a written line, by improving the problem that, in a thin line-shaped fired pencil lead, though a fired lead can be obtained, when trying to acquire sufficient breakage strength, a lead body is hardly abraded to lower a handwriting density.SOLUTION: In a fired pencil lead, a blending material in which the weight ratio of a thermoplastic resin to the total weight of graphite and the thermoplastic resin is 42-50 wt% is kneaded, extruded into a thin line and then thermally treated, to thereby form a plurality of protrusions in which a cross-sectional diameter is 0.05-0.25 mm, and a height in the longitudinal direction of a side wall is 0.3-4.5% to the cross-sectional diameter.SELECTED DRAWING: None
机译:解决的问题:通过改善以下问题:提供一种在细线形烧制的铅笔芯中虽然可以得到烧制的铅笔芯的问题,但提供一种在弯曲强度和书写线的密度之间具有良好平衡的烧制的铅笔芯。为了获得足够的断裂强度,几乎不磨损引线主体以降低笔迹密度。解决方案:在烧制的铅笔芯中,一种混合​​材料,其中热塑性树脂与石墨和热塑性树脂的总重量之比为捏合42-50wt%,挤出成细线,然后进行热处理,从而形成横截面直径为0.05-0.25mm,并且在侧壁的纵向方向上的高度为多个的突起。横截面直径的0.3-4.5%。

著录项

  • 公开/公告号JP2016027072A

    专利类型

  • 公开/公告日2016-02-18

    原文格式PDF

  • 申请/专利权人 PENTEL CORP;

    申请/专利号JP20140195873

  • 发明设计人 MIURA TAKAHIRO;

    申请日2014-09-25

  • 分类号C09D13/00;B43K21/16;

  • 国家 JP

  • 入库时间 2022-08-21 14:45:29

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