Title:
FIRED PENCIL LEAD
Document Type and Number:
Japanese Patent JP2011068796
Kind Code:
A
Abstract:
To provide a pencil lead having bending strength and dense handwriting without causing poor appearance such as crack, swelling, etc., on the surface.
The fired pencil lead includes silsesquioxane as a filler in a raw material. The fired pencil lead satisfying both bending strength and dense handwriting is obtained since the filler has excellent dispersibility in a binder, poor appearances such as crack, swelling, etc., on the surface do not occur, orientation of extender is not disturbed and binding between the extender and a carbonized material is increased.
Inventors:
YOSHIMORI JUN
Application Number:
JP2009221745A
Publication Date:
April 07, 2011
Filing Date:
September 28, 2009
Export Citation:
Assignee:
PENTEL KK
International Classes:
C09D13/00; B43K19/02
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