JPS55135182A - Lead for automatic pencil - Google Patents
Lead for automatic pencilInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62129370A (en) * | 1985-11-29 | 1987-06-11 | Pentel Kk | Production of pencil lead |
-
1979
- 1979-04-07 JP JP4240079A patent/JPS55135182A/en active Pending
Cited By (1)
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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