METHOD FOR MANUFACTURING PENCIL LEAD

PROBLEM TO BE SOLVED: To provide a pencil lead excellent in the balance between flexural strength and density. SOLUTION: In the method for manufacturing a pencil lead by using at least a binder and a body filler as major materials, extruding the kneaded raw materials into a fine wire and subjecting...

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Bibliographic Details
Main Author FUJIMAGARI HITOSHI
Format Patent
LanguageEnglish
Published 12.07.2007
Subjects
ADHESIVES
BUREAU ACCESSORIES
CHEMICAL PAINT OR INK REMOVERS
CHEMISTRY
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS
CORRECTING FLUIDS
DYES
FILLING PASTES
IMPLEMENTS FOR WRITING OR DRAWING
INKS
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
PASTES OR SOLIDS FOR COLOURING OR PRINTING
PERFORMING OPERATIONS
POLISHES
TRANSPORTING
USE OF MATERIALS THEREFOR
WOODSTAINS
WRITING OR DRAWING IMPLEMENTS
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Summary:PROBLEM TO BE SOLVED: To provide a pencil lead excellent in the balance between flexural strength and density. SOLUTION: In the method for manufacturing a pencil lead by using at least a binder and a body filler as major materials, extruding the kneaded raw materials into a fine wire and subjecting the fine wire to a firing treatment, at least an acrylic acid polymer containing a (meth)acrylic acid monomer unit and having a weight average molecular weight of 50,000-4,000,000 is used as a material. COPYRIGHT: (C)2007,JPO&INPIT
Bibliography:Application Number: JP20050374285