JPH07179805A - Production of lead for mechanical pencil - Google Patents
Production of lead for mechanical pencilInfo
- Publication number
- JPH07179805A JPH07179805A JP34655093A JP34655093A JPH07179805A JP H07179805 A JPH07179805 A JP H07179805A JP 34655093 A JP34655093 A JP 34655093A JP 34655093 A JP34655093 A JP 34655093A JP H07179805 A JPH07179805 A JP H07179805A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- complex
- mechanical pencil
- core
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は高強度，高濃度で筆記性
良好なシャープペンシル用芯の製造方法に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a lead for a mechanical pencil which has high strength, high density and good writing property.
【０００２】[0002]
【従来の技術】従来、シャープペンシル用芯は、有機結
合剤と充填剤を主材とし、これに可塑剤を添加し、これ
らをニーダー及びロールで混練し、混練物を芯状に成形
し、９００〜１３００℃の温度で炭素化後、得られた焼
結体の気孔中に油脂類を含浸させて完成される。しか
し、この方法では、常温から５００℃位まで極めてゆっ
くりとした温度で昇温しなければならず、工程も煩雑
で、また充分な強度・濃度を有する芯を得るまでには至
っていなかった。そこで芯の強度を向上させる為、少量
の金属化合物を加える方法として、例えば特公昭４８−
２１６４８号公報には、加熱焼成により炭化する粘結剤
に黒鉛及び金属或いはその炭化物、酸化物の微粉末を重
量比に於って、全量の数パーセント混合することによ
り、金属が炭素化を促進し、結合を強化できることにつ
いて、また特公昭５８−８０３６９号公報には金属塩化
物を溶剤に希釈溶解させ粘結剤に添加混合することによ
り均一な混合系ができ強度及び筆跡濃度大の芯が得られ
ることが各々開示されている。2. Description of the Related Art Conventionally, a core for a mechanical pencil has an organic binder and a filler as main materials, a plasticizer is added thereto, and these are kneaded with a kneader and a roll to form a kneaded product into a core, After carbonization at a temperature of 900 to 1300 ° C., the pores of the obtained sintered body are impregnated with oils and fats to complete the process. However, in this method, the temperature must be raised from room temperature to about 500 ° C. at an extremely slow temperature, the process is complicated, and a core having sufficient strength and concentration has not been obtained. Therefore, in order to improve the strength of the core, a method of adding a small amount of a metal compound is disclosed in, for example, Japanese Patent Publication No.
No. 21648 discloses that a metal promotes carbonization by mixing graphite and a metal or a fine powder of a metal or a carbide or oxide thereof in a binder, which is carbonized by heating and firing, in a weight ratio of several percent. Regarding the ability to strengthen the bond, and Japanese Patent Publication No. 58-80369, a metal chloride is diluted and dissolved in a solvent and added to a binder to form a uniform mixing system, and a core having high strength and handwriting density is obtained. It is disclosed that each of them is obtained.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、これら
の方法では、分散性や混練過程での熱可塑性樹脂の加熱
変化の問題により、高強度、高濃度の芯を得る為には不
充分であり、金属微粉末や金属塩化物の添加だけでは満
足な芯が一定品質で得られないという課題があった。However, these methods are insufficient for obtaining a core having high strength and high concentration due to problems of dispersibility and heat change of the thermoplastic resin in the kneading process, There is a problem that a satisfactory core cannot be obtained with a constant quality only by adding the fine metal powder or the metal chloride.
【０００４】[0004]
【課題を解決するための手段】本発明者は、これらの課
題を解決する為様々な研究を行なった結果、高級脂肪酸
エステルの塩素化物及び又は高級脂肪族炭化水素の塩素
化物と溶剤に希釈溶解させた金属アセチルアセトナート
錯体を併用して添加することにより課題を解決できるこ
とを見い出し、本発明を完成するに至った。金属アセチ
ルアセトネート錯体を形成する金属は多数あるが、アセ
チルアセトネート錯体を作るものであれば、金属の種類
を問わず、単独もしくは二種以上組み合わせて使用して
も同様な効果が得られる。本発明で特に効果的であった
ものは、Ｆｅ，Ｎｉ，Ｃｏ，Ｚｎの金属錯体であった。
金属錯体の溶解希釈に使用した溶剤は一般的に結合剤及
び錯体を溶解させるものであればよい。本発明では、ア
ルコール類，ケトン類，エステル類等が好適であった。
高級脂肪酸エステルの塩素化物としては、ステアリン
酸，リノール酸，オレイン酸等の塩素化物、高級脂肪族
炭化水素の塩素化物としては、パラフィンワックス，ノ
ルマルパラフィンワックス等の塩素化物が良好である。As a result of various studies to solve these problems, the inventor of the present invention dilutes and dissolves a chlorinated compound of a higher fatty acid ester and / or a chlorinated compound of a higher aliphatic hydrocarbon and a solvent. It was found that the problem can be solved by adding the metal acetylacetonato complex thus prepared in combination, and the present invention has been completed. Although there are many metals that form the metal acetylacetonate complex, the same effect can be obtained if the metal is used to form the acetylacetonate complex, regardless of the kind of the metal, even if used alone or in combination of two or more kinds. What was particularly effective in the present invention was a metal complex of Fe, Ni, Co and Zn.
The solvent used for dissolving and diluting the metal complex may generally be one that dissolves the binder and the complex. In the present invention, alcohols, ketones, esters and the like were suitable.
Chlorinated products of higher fatty acid esters are preferably chlorinated products such as stearic acid, linoleic acid and oleic acid, and preferred chlorinated products of higher aliphatic hydrocarbons are chlorinated products such as paraffin wax and normal paraffin wax.
【０００５】又、本発明で用いる熱可塑性樹脂はポリビ
ニルエステル系樹脂，ポリビニルアセタール系樹脂，ポ
リビニルエーテル系樹脂、含ハロゲン系樹脂等が良好で
あり、具体的にはポリビニルエステル系樹脂としては、
ポリ酢酸ビニル，ポリプロピオン酸ビニル、ポリビニル
アセタール系樹脂としては、ポリビニルホルマール，ポ
リビニルアセトアセタール、ポリビニルエーテル系樹脂
としては、ポリビニルメチルエーテル，ポリビニルエチ
ルエーテル，ポリビニルイソブチルエーテル、含ハロゲ
ン系樹脂としては、ポリ塩化ビニル，ポリ塩化ビニリデ
ン、塩素化ポリエチレン，塩素化ポリ塩化ビニル，塩化
ビニル−酢酸ビニル共重合体等が挙げられる。これらは
単独もしくは二種以上組み合わせて使用してもよい。Further, the thermoplastic resin used in the present invention is preferably a polyvinyl ester resin, a polyvinyl acetal resin, a polyvinyl ether resin, a halogen-containing resin, and the like. Specifically, as the polyvinyl ester resin,
Polyvinyl acetate, polyvinyl propionate, polyvinyl acetal resins include polyvinyl formal and polyvinyl acetoacetal, polyvinyl ether resins include polyvinyl methyl ether, polyvinyl ethyl ether, polyvinyl isobutyl ether, and halogen-containing resins include polyvinyl Examples thereof include vinyl chloride, polyvinylidene chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, vinyl chloride-vinyl acetate copolymer and the like. You may use these individually or in combination of 2 or more types.
【０００６】本発明は、高級脂肪酸エステルの塩素化物
及び／又は高級脂肪族炭化水素の塩素化物と溶剤に希釈
溶解させた金属アセチルアセトネート錯体を併用し、添
加することを特徴とするものであり、結合剤との均一分
散が可能な為、高強度、高濃度を有した芯ができる。こ
のときの金属錯体の添加量は、結合剤に対して１．０〜
１０．０重量％添加するのが望ましく、１．０重量％以
下では、炭素化反応に影響を及ぼさず、１０．０重量％
以上では炭素化反応がうまく進行せず、良好な芯が得ら
れない為好ましくない。しかし使用する金属錯体の種類
や焼成条件によって最適添加量は異なってくるが、請求
の範囲を越えるものではない。以下に実施例を示して本
発明を更に詳しく説明する。The present invention is characterized in that a chloride of a higher fatty acid ester and / or a chloride of a higher aliphatic hydrocarbon and a metal acetylacetonate complex diluted and dissolved in a solvent are used in combination. Since a uniform dispersion with the binder is possible, a core having high strength and high concentration can be obtained. The addition amount of the metal complex at this time is 1.0 to the binder.
It is desirable to add 10.0% by weight, and if it is 1.0% by weight or less, it does not affect the carbonization reaction and 10.0% by weight.
The above is not preferable because the carbonization reaction does not proceed well and a good core cannot be obtained. However, the optimum addition amount varies depending on the type of metal complex used and the firing conditions, but it does not exceed the claimed range. Hereinafter, the present invention will be described in more detail with reference to Examples.
【０００７】[0007]
実施例１ 酢酸ビニル樹脂 ３００重量部 黒鉛 ６００重量部 ワックス ５０重量部 塩素化パラフィン １０重量部 鉄アセチルアセトネート錯体 ３０重量部 酢酸エチル １００重量部 鉄アセチルアセトネート錯体を酢酸エチルに溶解し、こ
れに上記材料を混合しニーダー及び３本ロールミルで充
分混練後、押し出し成形機で芯の形に成形した。これを
１００℃で２４時間、２００℃で１２時間酸化処理を行
なった後、黒鉛ルツボに詰めて、密封し、１２００℃の
温度で１時間焼成した。得られた芯を放冷し、１００℃
に加熱した流動パラフィン中に１時間浸漬して完成させ
た。 実施例２ 酢酸ビニル樹脂 ３００重量部 黒鉛 ６００重量部 ワックス ５０重量部 塩素化パラフィン １０重量部 コバルトアセチルアセトネート錯体 ３０重量部 酢酸エチル １００重量部 実施例１と同様にして完成芯を得た。 実施例３ 塩化ビニル樹脂 ３００重量部 黒鉛 ６００重量部 ワックス ５０重量部 塩素化パラフィン １０重量部 ニッケルアセチルアセトネート錯体 ２０重量部 酢酸エチル １００重量部 実施例１と同様にして完成芯を得た。 実施例４ 塩化ビニル−酢酸ビニル共重合物 ３００重量部 黒鉛 ６００重量部 ワックス ５０重量部 塩素化パラフィン １０重量部 鉄アセチルアセトネート錯体 ３０重量部 酢酸エチル １００重量部 実施例１と同様にして完成芯を得た。 比較例１ 酢酸ビニル樹脂 ３００重量部 黒鉛 ６００重量部 ワックス ５０重量部 塩素化パラフィン １０重量部 実施例１と同様に、金属アセチルアセトネート錯体を除
いた系で完成芯を得た。 比較例２ 塩化ビニル樹脂 ３００重量部 黒鉛 ６００重量部 ワックス ５０重量部 塩素化パラフィン １０重量部 比較例１と同様に完成芯を得た。 比較例３ ポリ塩化ビニル−酢酸ビニル共重合物 ３００重量部 黒鉛 ６００重量部 ワックス ５０重量部 塩素化パラフィン １０重量部 比較例１と同様に完成芯を得た。Example 1 Vinyl acetate resin 300 parts by weight Graphite 600 parts by weight Wax 50 parts by weight Chlorinated paraffin 10 parts by weight Iron acetylacetonate complex 30 parts by weight Ethyl acetate 100 parts by weight Iron acetylacetonate complex is dissolved in ethyl acetate and added thereto. The above materials were mixed, sufficiently kneaded with a kneader and a three-roll mill, and then molded into a core shape by an extrusion molding machine. This was subjected to an oxidation treatment at 100 ° C. for 24 hours and at 200 ° C. for 12 hours, then packed in a graphite crucible, sealed, and fired at a temperature of 1200 ° C. for 1 hour. The core obtained is allowed to cool to 100 ° C.
It was completed by immersing it in liquid paraffin heated for 1 hour. Example 2 Vinyl acetate resin 300 parts by weight Graphite 600 parts by weight Wax 50 parts by weight Chlorinated paraffin 10 parts by weight Cobalt acetylacetonate complex 30 parts by weight Ethyl acetate 100 parts by weight In the same manner as in Example 1, a finished core was obtained. Example 3 Vinyl chloride resin 300 parts by weight Graphite 600 parts by weight Wax 50 parts by weight Chlorinated paraffin 10 parts by weight Nickel acetylacetonate complex 20 parts by weight Ethyl acetate 100 parts by weight In the same manner as in Example 1, a finished core was obtained. Example 4 Vinyl chloride-vinyl acetate copolymer 300 parts by weight Graphite 600 parts by weight Wax 50 parts by weight Chlorinated paraffin 10 parts by weight Iron acetylacetonate complex 30 parts by weight Ethyl acetate 100 parts by weight Complete core similar to Example 1 Got Comparative Example 1 Vinyl acetate resin 300 parts by weight Graphite 600 parts by weight Wax 50 parts by weight Chlorinated paraffin 10 parts by weight In the same manner as in Example 1, a finished core was obtained by a system excluding the metal acetylacetonate complex. Comparative Example 2 Vinyl chloride resin 300 parts by weight Graphite 600 parts by weight Wax 50 parts by weight Chlorinated paraffin 10 parts by weight A finished core was obtained in the same manner as in Comparative Example 1. Comparative Example 3 Polyvinyl chloride-vinyl acetate copolymer 300 parts by weight Graphite 600 parts by weight Wax 50 parts by weight Chlorinated paraffin 10 parts by weight As in Comparative Example 1, a finished core was obtained.
【０００８】実施例１〜４、比較例１〜３の曲げ強度及
び濃度の測定結果を表１に示す。Table 1 shows the measurement results of bending strength and density of Examples 1 to 4 and Comparative Examples 1 to 3.
【０００９】[0009]
【表１】 [Table 1]
【００１０】[0010]
【発明の効果】本発明によるシャープペンシル用芯の製
造方法によれば測定結果から明らかなように、高級脂肪
酸エステルの塩素化物あるいは高級脂肪族炭化水素と更
に金属アセチルアセトナート錯体を使用することによ
り、強度が向上し、高濃度で筆記性の良好なシャープペ
ンシル用芯が得られる。According to the method for producing a lead for a mechanical pencil according to the present invention, as is clear from the measurement results, by using a chlorinated product of a higher fatty acid ester or a higher aliphatic hydrocarbon and further a metal acetylacetonate complex. A core for a mechanical pencil having improved strength, good concentration, and high concentration can be obtained.
Claims (1)
として天然黒鉛あるいは人造黒鉛を配合してなるシャー
プペンシル用芯の配合組成物に高級脂肪酸エステルの塩
素化物及び／又は高級脂肪族炭化水素の塩素化物、更に
有機結合剤に対して１．０〜１０．０重量％の金属アセ
チルアセトネート錯体を併用し、添加混練後、押し出し
成形、炭素化処理を経て得られるシャープペンシル用芯
の製造方法。1. A compounding composition of a mechanical pencil lead comprising a thermoplastic resin as an organic binder and natural graphite or artificial graphite as a filler, and a chlorinated product of a higher fatty acid ester and / or a higher aliphatic hydrocarbon. Chloride, and further, 1.0 to 10.0% by weight of metal acetylacetonate complex with respect to the organic binder are used in combination, and after addition and kneading, a method for producing a mechanical pencil lead obtained by extrusion molding and carbonization treatment. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34655093A JPH07179805A (en) | 1993-12-22 | 1993-12-22 | Production of lead for mechanical pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34655093A JPH07179805A (en) | 1993-12-22 | 1993-12-22 | Production of lead for mechanical pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07179805A true JPH07179805A (en) | 1995-07-18 |
Family
ID=18384194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34655093A Pending JPH07179805A (en) | 1993-12-22 | 1993-12-22 | Production of lead for mechanical pencil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07179805A (en) |
-
1993
- 1993-12-22 JP JP34655093A patent/JPH07179805A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0296552B1 (en) | Metal binder and molding composition | |
| DE202014005691U1 (en) | Binder for an injection molding composition | |
| JPH06293874A (en) | Production of pencil lead | |
| JPH07179805A (en) | Production of lead for mechanical pencil | |
| JPH0525506A (en) | Production of injection-molded and sintered pure iron having high strength | |
| JP3276497B2 (en) | Manufacturing method of mechanical pencil lead | |
| AU2010350288A1 (en) | Clay-like composition for forming a sintered silver alloy object, powder for a clay-like composition for forming a sintered silver alloy object, method for manufacturing a clay-like composition for forming a sintered silver alloy object, sintered silver alloy object, and method for manufacturing a sintered silver alloy object | |
| DE10104226A1 (en) | Core / shell catalyst bodies | |
| DE3425911A1 (en) | VINYL CHLORIDE RESIN | |
| JP2900622B2 (en) | Manufacturing method of pencil lead | |
| JP3111709B2 (en) | Production method of fine composite carbide powder for production of tungsten carbide based cemented carbide | |
| CN110202157A (en) | A kind of titanium alloy composite material and the method that titanium alloy fishing rod abnormity lead ring is prepared based on Powder Injection Molding Technology | |
| KR102569196B1 (en) | Manufacturing method of copper connector for electric vehicle using metal powder injection molding | |
| JP5223164B2 (en) | Pencil lead manufacturing method | |
| JP2008189981A (en) | Method for manufacturing sintered compact, and sintered compact | |
| DE1209477B (en) | Process for the pretreatment of powders, which are processed by pressing and sintering into molded bodies, in particular into magnetic cores | |
| JPH0131794B2 (en) | ||
| CN114472879B (en) | Adhesive for pure titanium powder injection molding and preparation method and application thereof | |
| JP3978727B2 (en) | Gold-coated silver powder for silver clay with excellent corrosion resistance and low temperature sinterability and silver clay with excellent low temperature sinterability without discoloration | |
| JP3003379B2 (en) | Noble metal plastic composition | |
| DE2921424A1 (en) | METHOD OF MANUFACTURING A SHAPED BODY | |
| JPH075925B2 (en) | Metal binder and molding composition | |
| JPH083504A (en) | Production of non-baked pencil lead | |
| JPS6382799A (en) | Manufacture of pencil lead | |
| JP2004256593A (en) | Pencil lead or mechanical pencil lead |