JPS56163171A - Uncalcined pencil lead - Google Patents
Uncalcined pencil leadInfo
- Publication number
- JPS56163171A JPS56163171A JP6738780A JP6738780A JPS56163171A JP S56163171 A JPS56163171 A JP S56163171A JP 6738780 A JP6738780 A JP 6738780A JP 6738780 A JP6738780 A JP 6738780A JP S56163171 A JPS56163171 A JP S56163171A
- Authority
- JP
- Japan
- Prior art keywords
- uncalcined
- pencil lead
- base material
- plasticizer
- solvent
- 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.)
- Granted
Links
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
PURPOSE: Uncalcined pencil lead with excellent bending strength, which contains a specified fibrous potassium titanate as at least a part of the base material.
CONSTITUTION: A base material cpntg. about 20wt% or more fibrous potassium titanate (preferably prepared by the flux process) of diameter 0.1W2μ, length 10W 500μ and ≥100 aspect ratio, is used. A composition obtd. by mixing a binder consisting of an org. polymer, a wax, a colorant, said base material, a plasticizer, a solvent, etc., is extruded and then the plasticizer, solvent, etc. are volatilized, to form uncalcined pencil lead.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6738780A JPS56163171A (en) | 1980-05-21 | 1980-05-21 | Uncalcined pencil lead |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6738780A JPS56163171A (en) | 1980-05-21 | 1980-05-21 | Uncalcined pencil lead |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56163171A true JPS56163171A (en) | 1981-12-15 |
JPS623189B2 JPS623189B2 (en) | 1987-01-23 |
Family
ID=13343526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6738780A Granted JPS56163171A (en) | 1980-05-21 | 1980-05-21 | Uncalcined pencil lead |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56163171A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5968987U (en) * | 1982-10-30 | 1984-05-10 | ぺんてる株式会社 | colored pencil lead |
JPS6227480A (en) * | 1985-07-30 | 1987-02-05 | Pentel Kk | Production of color lead |
JPS63189481A (en) * | 1987-01-31 | 1988-08-05 | Pentel Kk | Production of lead in colored pencil |
EP0224579B1 (en) * | 1985-05-24 | 1990-01-24 | MERCK PATENT GmbH | Smectic liquid crystalline phases |
-
1980
- 1980-05-21 JP JP6738780A patent/JPS56163171A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5968987U (en) * | 1982-10-30 | 1984-05-10 | ぺんてる株式会社 | colored pencil lead |
JPS632428Y2 (en) * | 1982-10-30 | 1988-01-21 | ||
EP0224579B1 (en) * | 1985-05-24 | 1990-01-24 | MERCK PATENT GmbH | Smectic liquid crystalline phases |
JPS6227480A (en) * | 1985-07-30 | 1987-02-05 | Pentel Kk | Production of color lead |
JPH0542987B2 (en) * | 1985-07-30 | 1993-06-30 | Pentel Kk | |
JPS63189481A (en) * | 1987-01-31 | 1988-08-05 | Pentel Kk | Production of lead in colored pencil |
Also Published As
Publication number | Publication date |
---|---|
JPS623189B2 (en) | 1987-01-23 |
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