JPH0149750B2 - - Google Patents
Info
- Publication number
- JPH0149750B2 JPH0149750B2 JP61153720A JP15372086A JPH0149750B2 JP H0149750 B2 JPH0149750 B2 JP H0149750B2 JP 61153720 A JP61153720 A JP 61153720A JP 15372086 A JP15372086 A JP 15372086A JP H0149750 B2 JPH0149750 B2 JP H0149750B2
- Authority
- JP
- Japan
- Prior art keywords
- core
- boron nitride
- writing
- load
- low
- 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.)
- Expired
Links
- 229910052582 BN Inorganic materials 0.000 claims description 34
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 23
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 8
- 239000000314 lubricant Substances 0.000 claims description 6
- 238000002441 X-ray diffraction Methods 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims 1
- 229910002804 graphite Inorganic materials 0.000 description 7
- 239000010439 graphite Substances 0.000 description 7
- 150000002894 organic compounds Chemical class 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000004927 clay Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 3
- 239000004327 boric acid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- 229910021538 borax Inorganic materials 0.000 description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 2
- 235000013539 calcium stearate Nutrition 0.000 description 2
- 239000008116 calcium stearate Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000004328 sodium tetraborate Substances 0.000 description 2
- 235000010339 sodium tetraborate Nutrition 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003738 black carbon Substances 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- FUFJGUQYACFECW-UHFFFAOYSA-L calcium hydrogenphosphate Chemical compound [Ca+2].OP([O-])([O-])=O FUFJGUQYACFECW-UHFFFAOYSA-L 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011294 coal tar pitch Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000019700 dicalcium phosphate Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010421 pencil drawing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61153720A JPS6346278A (ja) | 1986-06-30 | 1986-06-30 | 低荷重用芯 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61153720A JPS6346278A (ja) | 1986-06-30 | 1986-06-30 | 低荷重用芯 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6346278A JPS6346278A (ja) | 1988-02-27 |
| JPH0149750B2 true JPH0149750B2 (fr) | 1989-10-25 |
Family
ID=15568627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61153720A Granted JPS6346278A (ja) | 1986-06-30 | 1986-06-30 | 低荷重用芯 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6346278A (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0696626A1 (fr) | 1994-08-12 | 1996-02-14 | Mitsubishi Pencil Kabushiki Kaisha | Mine de crayon ayant subi une cuisson et son procédé de fabrication |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3521178B2 (ja) * | 1997-07-09 | 2004-04-19 | 電気化学工業株式会社 | 六方晶窒化ほう素粉末及び用途 |
| DE102006010119B3 (de) * | 2006-02-27 | 2007-08-02 | J. S. Staedtler Gmbh & Co. Kg | Farbmine für Schreib-, Zeichen- oder Malgeräte |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4874321A (fr) * | 1972-01-07 | 1973-10-06 | ||
| JPS6067578A (ja) * | 1983-09-22 | 1985-04-17 | Pilot Precision Co Ltd | 鉛芯 |
-
1986
- 1986-06-30 JP JP61153720A patent/JPS6346278A/ja active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4874321A (fr) * | 1972-01-07 | 1973-10-06 | ||
| JPS6067578A (ja) * | 1983-09-22 | 1985-04-17 | Pilot Precision Co Ltd | 鉛芯 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0696626A1 (fr) | 1994-08-12 | 1996-02-14 | Mitsubishi Pencil Kabushiki Kaisha | Mine de crayon ayant subi une cuisson et son procédé de fabrication |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6346278A (ja) | 1988-02-27 |
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