JPH01111305A - Plastic magnet composition - Google Patents
Plastic magnet compositionInfo
- Publication number
- JPH01111305A JPH01111305A JP26824187A JP26824187A JPH01111305A JP H01111305 A JPH01111305 A JP H01111305A JP 26824187 A JP26824187 A JP 26824187A JP 26824187 A JP26824187 A JP 26824187A JP H01111305 A JPH01111305 A JP H01111305A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic force
- strontium ferrite
- ferrite
- polyamide resin
- binder
- 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
- 239000004033 plastic Substances 0.000 title claims description 9
- 239000000203 mixture Substances 0.000 title claims description 8
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 7
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 7
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 239000012756 surface treatment agent Substances 0.000 claims abstract description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 3
- 229910000077 silane Inorganic materials 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 239000000843 powder Substances 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 2
- 238000007906 compression Methods 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 150000004756 silanes Chemical class 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、最大エネルギー積が２．０ Ｍ！Ｏｅ以上の
高磁力を有し、且つ射出成形性が良好であるフェライト
系プラスチック磁石組成物に関するものであり、各種モ
ータ、コピー機のマグネットローラー等に使用されるも
のである。[Detailed Description of the Invention] The present invention has a maximum energy product of 2.0 M! The present invention relates to a ferrite-based plastic magnet composition that has a high magnetic force of Oe or more and has good injection moldability, and is used in various motors, magnetic rollers of copying machines, and the like.
従来よりポリアミド樹脂を基本マトリックスとしたプラ
スチック磁石は知られているが、焼結磁石に比べ樹脂分
があるため磁力が低く焼結磁石を代替できる分野は非常
に限定されたものであった。また高磁力化するためにフ
ェライトの高充填が試みられてきたが、フェライトコン
テントが９０重量％を越えると急激に射出成形性の低下
が起り、またそのため高磁力を有するプラスチック磁石
が得られなかった。Plastic magnets with a basic matrix of polyamide resin have been known for some time, but because they have a resin content compared to sintered magnets, their magnetic force is lower, and the fields in which they can be used as a substitute for sintered magnets are extremely limited. In addition, attempts have been made to increase ferrite filling in order to increase magnetic force, but when the ferrite content exceeds 90% by weight, injection moldability suddenly deteriorates, and as a result, plastic magnets with high magnetic force cannot be obtained. .
本発明は従来できなかった射出成形性が良好でかつ最大
エネルギー積が２．０ ＭＧＯｅ以上を有するプラスチ
ック磁石組成物を得んとして研究した結果、シラン系表
面処理剤で前処理２れた平均粒子Ｂカ１．５０ ｐｗｓ
〜１．８５ μＩＩ Ｔ！且ツ圧１ｉ！ｖＩ！度が３
．３５〜３．４２１／ｃｄであるストロンチウムフェラ
イトを高充填する事により得られるとの知見を得、更に
この知見に基づき種々研究を進めて本発明を完成するに
至ったものである。As a result of research aimed at obtaining a plastic magnet composition that has good injection moldability and a maximum energy product of 2.0 MGOe or more, which has not been possible in the past, the present invention was developed using average particles pretreated with a silane surface treatment agent. B power 1.50 pws
~1.85 μII T! And pressure 1i! vI! degree is 3
．． It was found that this can be obtained by highly filling strontium ferrite with a density of 35 to 3.421/cd, and based on this knowledge, various studies were conducted and the present invention was completed.
本発明は、シラン系表面処理剤で前処理された平均粒子
径が１．５０μｍ〜１．６５μｍでかつ圧縮密度が３．
３５ ｇ／ｃｔＡ 〜３．４２ ｇｌｃｄであるストロ
ンチウム・フェライト１００重量部に対してバインダー
としてポリアミド樹脂を６〜１０重量部添加する事を特
徴とするプラスチック磁石組成物に関するものである。The present invention is characterized in that the particles are pretreated with a silane surface treatment agent and have an average diameter of 1.50 μm to 1.65 μm and a compressed density of 3.0 μm.
The present invention relates to a plastic magnet composition characterized in that 6 to 10 parts by weight of polyamide resin is added as a binder to 100 parts by weight of strontium ferrite having a value of 35 g/ctA to 3.42 glcd.
本発明による平均粒子径が１．５０１Ｉｆｆｌ〜１．６
５μｍでかつ圧縮密度が３．３５ ｇｌｃｄ 〜３．４
２ ｇｌｃｄであるストロンチウムフエーライトは粉体
被表面積測定装置により平均粒子径が、求められ、且つ
圧縮密度は、１平方センチメートルあたり１トンの荷重
をかけた時に１立方センチメートルあたりに充填可能な
フェライトのｇ数で示されるものである。The average particle diameter according to the present invention is 1.501 Iffl to 1.6
5 μm and compressed density 3.35 glcd ~ 3.4
The average particle diameter of strontium ferrite, which is GLCD, is determined by a powder surface area measuring device, and the compressed density is the number of grams of ferrite that can be filled per cubic centimeter when a load of 1 ton per square centimeter is applied. This is shown in .
またポリアミド樹脂の添加量としては６重量部から１０
重量部が望ましく、１０重量部を越すと射出成形性は良
好になるが、磁力の低下をきたし、６重量部以下である
と、射出成形性が極端に悪くなり、磁力の低下を引きお
こすのである。The amount of polyamide resin added is 6 parts by weight to 10 parts by weight.
Parts by weight are desirable, and if it exceeds 10 parts by weight, injection moldability will be good, but the magnetic force will decrease, and if it is less than 6 parts by weight, injection moldability will be extremely poor, causing a decrease in magnetic force. .
また補強剤としてガラス繊維等の無機物を若干添加して
も本発明の主旨をはずれるものではない。Further, it would not depart from the spirit of the present invention even if a small amount of inorganic material such as glass fiber is added as a reinforcing agent.
本発明に従えば、従来のプラスチック磁石組成物に比べ
最大エネルギー積が２ ＭＧＯｅ以上の高磁力を有し、
且つ射出成形性に優れたプラスチック磁石組成物工業的
に好適である。According to the present invention, it has a high magnetic force with a maximum energy product of 2 MGOe or more compared to conventional plastic magnet compositions,
Moreover, the plastic magnet composition has excellent injection moldability and is industrially suitable.
第１表に示す組成のものをヘンシュルミキサ−でかくは
ん、混合し二軸同方向連続押出機でフィーダー側より２
００°Ｃ，２２０℃、２５０’Ｃの温度で溶融混練し、
造粒機で造粒した。ベレットを２．５オンス磁場射出成
形機でホッパー側より２７０°Ｃ，２８０°Ｃノズル２
８５°Ｃの温度で磁場成形を行ないφ３０ Ｘ ３．５
°の軸異方性の円板を作製し、Ｂ１（トレーサーで最大
エネルギー積を求めた。The compositions shown in Table 1 were stirred and mixed in a Henschel mixer, and then passed through a twin-screw co-directional continuous extruder from the feeder side.
Melt and knead at temperatures of 00°C, 220°C, and 250'C,
It was granulated using a granulator. The pellets are molded using a 2.5 oz magnetic field injection molding machine at 270°C and 280°C nozzle 2 from the hopper side.
Perform magnetic field forming at a temperature of 85°C to φ30 x 3.5
A disk with axial anisotropy of ° was prepared, and the maximum energy product was determined using B1 (tracer).
Claims (1)
．５０〜１．６５μｍでかつ圧縮密度が３．３５〜３．
４２ｇ／ｃｍ＾３であるストロンチウムフェライト１０
０重量部に対して、バインダーとしてポリアミド樹脂を
６〜１０重量部添加する事を特徴とするプラスチック磁
石組成物。Pretreated with a silane surface treatment agent, the average particle size is 1
．． 50 to 1.65 μm and a compressed density of 3.35 to 3.
Strontium ferrite 10 which is 42g/cm^3
A plastic magnet composition characterized in that 6 to 10 parts by weight of a polyamide resin is added as a binder to 0 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26824187A JPH01111305A (en) | 1987-10-26 | 1987-10-26 | Plastic magnet composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26824187A JPH01111305A (en) | 1987-10-26 | 1987-10-26 | Plastic magnet composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01111305A true JPH01111305A (en) | 1989-04-28 |
Family
ID=17455860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26824187A Pending JPH01111305A (en) | 1987-10-26 | 1987-10-26 | Plastic magnet composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01111305A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04359155A (en) * | 1991-06-04 | 1992-12-11 | Matsushita Electric Ind Co Ltd | Fixing method for fg magnet |
| JP2005268729A (en) * | 2004-03-22 | 2005-09-29 | Dowa Mining Co Ltd | Ferrite magnetic powder for bond magnet |
| JP2008519879A (en) * | 2004-11-12 | 2008-06-12 | アルケマ フランス | Method for synthesizing organosols using silica with a large particle size |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6169102A (en) * | 1984-09-13 | 1986-04-09 | Shin Kobe Electric Mach Co Ltd | Manufacture of resin magnet molding material |
| JPS61127102A (en) * | 1984-11-26 | 1986-06-14 | Shin Kobe Electric Mach Co Ltd | Preparation of material for molding resin magnet |
| JPS62106604A (en) * | 1985-11-05 | 1987-05-18 | Matsushita Electric Works Ltd | Molding material for resin magnet |
-
1987
- 1987-10-26 JP JP26824187A patent/JPH01111305A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6169102A (en) * | 1984-09-13 | 1986-04-09 | Shin Kobe Electric Mach Co Ltd | Manufacture of resin magnet molding material |
| JPS61127102A (en) * | 1984-11-26 | 1986-06-14 | Shin Kobe Electric Mach Co Ltd | Preparation of material for molding resin magnet |
| JPS62106604A (en) * | 1985-11-05 | 1987-05-18 | Matsushita Electric Works Ltd | Molding material for resin magnet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04359155A (en) * | 1991-06-04 | 1992-12-11 | Matsushita Electric Ind Co Ltd | Fixing method for fg magnet |
| JP2005268729A (en) * | 2004-03-22 | 2005-09-29 | Dowa Mining Co Ltd | Ferrite magnetic powder for bond magnet |
| JP2008519879A (en) * | 2004-11-12 | 2008-06-12 | アルケマ フランス | Method for synthesizing organosols using silica with a large particle size |
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