JPS55135182A - Lead for automatic pencil - Google Patents

Lead for automatic pencil

Info

Publication number
JPS55135182A
JPS55135182A JP4240079A JP4240079A JPS55135182A JP S55135182 A JPS55135182 A JP S55135182A JP 4240079 A JP4240079 A JP 4240079A JP 4240079 A JP4240079 A JP 4240079A JP S55135182 A JPS55135182 A JP S55135182A
Authority
JP
Japan
Prior art keywords
lead
potassium titanate
short
fibrous
sintering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4240079A
Other languages
Japanese (ja)
Inventor
Isao Kawasaki
Hiroki Sakuramachi
Takashi Hasegawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TONBO ENPITSU KK
TONBO PENCIL
Original Assignee
TONBO ENPITSU KK
TONBO PENCIL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TONBO ENPITSU KK, TONBO PENCIL filed Critical TONBO ENPITSU KK
Priority to JP4240079A priority Critical patent/JPS55135182A/en
Publication of JPS55135182A publication Critical patent/JPS55135182A/en
Pending legal-status Critical Current

Links

Landscapes

  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

PURPOSE: To obtain a lead for an automatic pencile whose strength is raised without damaging its writability, by sintering a composition consisting of graphite and a high polymer as the main components along with a short-fibrous potassium titanate.
CONSTITUTION: In the manufacture of a sintered lead by sintering a composition consisting of graphite and a sinterable high polymer as the main components at 900W1100°C, a short-fibrous potassium titanate is mixed with said composition to yield a lead for an automatic pencil having a higher strength. The short fiber of potassium titanate used is of a fibrous or needle-like fine crystal 0.1W0.2μ is diameter and 2W5μ in length.
COPYRIGHT: (C)1980,JPO&Japio
JP4240079A 1979-04-07 1979-04-07 Lead for automatic pencil Pending JPS55135182A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4240079A JPS55135182A (en) 1979-04-07 1979-04-07 Lead for automatic pencil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4240079A JPS55135182A (en) 1979-04-07 1979-04-07 Lead for automatic pencil

Publications (1)

Publication Number Publication Date
JPS55135182A true JPS55135182A (en) 1980-10-21

Family

ID=12635010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4240079A Pending JPS55135182A (en) 1979-04-07 1979-04-07 Lead for automatic pencil

Country Status (1)

Country Link
JP (1) JPS55135182A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62129370A (en) * 1985-11-29 1987-06-11 Pentel Kk Production of pencil lead

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62129370A (en) * 1985-11-29 1987-06-11 Pentel Kk Production of pencil lead

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