JPH09165502A - Composition for bond magnet - Google Patents
Composition for bond magnetInfo
- Publication number
- JPH09165502A JPH09165502A JP7348324A JP34832495A JPH09165502A JP H09165502 A JPH09165502 A JP H09165502A JP 7348324 A JP7348324 A JP 7348324A JP 34832495 A JP34832495 A JP 34832495A JP H09165502 A JPH09165502 A JP H09165502A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- magnetic
- formula
- magnetic material
- component
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/08—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/083—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together in a bonding agent
Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明は、磁性体粉末を高充
填化しても成形容易で、かつ耐衝撃性に優れた成形品を
得ることができるボンド磁石用組成物に関し、特に、レ
ーザービーム型プリンター、乾式コピー機等の磁性ロー
ルの材料として好適に用いられるボンド磁石用組成物に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for a bonded magnet, which can be easily molded even if the magnetic powder is highly filled and has excellent impact resistance, and more particularly to a laser beam type composition. The present invention relates to a composition for a bonded magnet which is preferably used as a material for a magnetic roll of a printer, a dry copying machine and the like.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来よ
り、ボンド磁石は、フェライト等の磁性粉と、ナイロ
ン、ポリフェニレンスルフィド（ＰＰＳ）等のバインダ
ーとを適宜割合で混合した混合物をＫＣＫ混練機、二軸
押出機等の混練機により混練した後、ペレット形状にし
たボンド磁石用組成物を射出成形又は押出成形により意
図した形状に成形することによって得られている。2. Description of the Related Art Conventionally, a bond magnet has a KCK kneader, which is a mixture of a magnetic powder such as ferrite and a binder such as nylon and polyphenylene sulfide (PPS) mixed in an appropriate ratio. It is obtained by kneading with a kneader such as a twin-screw extruder, and then molding the pellet-shaped composition for a bonded magnet into an intended shape by injection molding or extrusion molding.
【０００３】この場合、ボンド磁石の高磁力化を達成す
るため、ボンド磁石用組成物としてバインダー中に磁性
粉を高充填化したものを用いる試みがなされているが、
従来技術では、このように磁性粉を高充填化すると、ボ
ンド磁石用組成物の流動性が低下する。そして、この磁
性粉を高充填化した組成物を射出成形すると、このよう
に流動性が低下しているので、成形機のバレル内で詰ま
りが生じたり、金型内に射出できないなどの問題が起こ
り、成形不能になる場合が生じる。このため、ボンド磁
石用組成物における磁性粉の高充填化、即ちボンド磁石
の高磁性化には一定の限界があった。In this case, in order to achieve a high magnetic force of the bonded magnet, an attempt has been made to use a composition in which a binder is highly filled with magnetic powder as a composition for the bonded magnet.
In the prior art, when the magnetic powder is highly filled in this way, the fluidity of the composition for bonded magnets is lowered. Then, when a composition in which the magnetic powder is highly filled is injection-molded, since the fluidity is lowered in this way, there is a problem that clogging occurs in the barrel of the molding machine or injection into the mold is not possible. Occurrence may occur and molding may not be possible. For this reason, there has been a certain limit in increasing the filling of the magnetic powder in the composition for a bonded magnet, that is, the higher magnetism of the bonded magnet.
【０００４】また、流動性を確保するためナイロン、ポ
リフェニレンスルフィド（ＰＰＳ）などの分子量を下げ
る試みがなされているが、これにより成形品の耐衝撃性
が低下し、得られた成形品が脆いものとなってしまうと
いう問題があった。Further, attempts have been made to reduce the molecular weight of nylon, polyphenylene sulfide (PPS) and the like in order to ensure fluidity, but this results in a decrease in impact resistance of the molded product, resulting in a brittle product. There was a problem of becoming.
【０００５】本発明は上記事情に鑑みなされたもので、
磁性体粉末を高充填しても高い流動性を保ち、成形性の
改善、高磁性化が可能で、耐衝撃性に優れた成形品を得
ることができるボンド磁石用組成物を提供することを目
的とする。[0005] The present invention has been made in view of the above circumstances,
To provide a composition for a bonded magnet capable of obtaining a molded article excellent in impact resistance, capable of maintaining high fluidity even when highly filled with magnetic powder, improving moldability, and achieving high magnetism. To aim.
【０００６】[0006]
【課題を解決するための手段及び発明の実施の形態】本
発明者らは、上記目的を達成するため、磁性体粉末を高
充填しても高い流動性を保つことができ、しかも成形品
の耐衝撃性が低下することのないバインダーについて鋭
意検討を重ねた結果、バインダーとして２価脂肪族アル
コールと芳香族ジカルボン酸とを重縮合してなるポリエ
ステル、特にポリエチレンテレフタレート（ＰＥＴ）樹
脂を用い、この樹脂に対して磁性体粉末を９７〜６０重
量％という高い割合に充填しても、流動性が低下するこ
となく、高磁力の複雑な形状の成形品を得ることがで
き、その上、得られた成形品は耐衝撃性にも優れてお
り、レーザービーム型プリンター、乾式コピー機等の磁
性ロールの材料として最適であることを見い出し、本発
明をなすに至ったものである。Means for Solving the Problems and Modes for Carrying Out the Invention In order to achieve the above-mentioned object, the present inventors can maintain high fluidity even when highly filled with magnetic powder, and As a result of extensive studies on a binder that does not reduce the impact resistance, a polyester obtained by polycondensing a dihydric aliphatic alcohol and an aromatic dicarboxylic acid, particularly a polyethylene terephthalate (PET) resin was used as a binder. Even if the magnetic powder is filled in a high ratio of 97 to 60% by weight with respect to the resin, it is possible to obtain a molded article having a high magnetic force and a complicated shape without lowering the fluidity. The molded product has excellent impact resistance and was found to be most suitable as a material for magnetic rolls in laser beam printers, dry copiers, etc. A.
【０００７】従って、本発明は、（Ａ）磁性体粉末と、
（Ｂ）下記一般式（１）で示される２価脂肪族アルコー
ルと下記一般式（２）で示される芳香族ジカルボン酸と
を重縮合してなるポリエステル ＨＯ−Ｒ1−ＯＨ …（１） （式中、Ｒ1は炭素数１〜５の２価の脂肪族炭化水素基
を示す。）とを配合してなるボンド磁石用組成物を提供
する。Therefore, the present invention comprises (A) a magnetic powder and
(B) Polyester obtained by polycondensing a divalent aliphatic alcohol represented by the following general formula (1) and an aromatic dicarboxylic acid represented by the following general formula (2) HO-R 1 -OH (1) (1) In the formula, R 1 represents a divalent aliphatic hydrocarbon group having 1 to 5 carbon atoms) and a bonded magnet composition.
【０００８】[0008]
【化２】 （式中、Ａｒはベンゼン環又はナフタレン環を示す。）Embedded image (In the formula, Ar represents a benzene ring or a naphthalene ring.)
【０００９】以下、本発明につき更に詳しく説明する
と、本発明のボンド磁石用組成物は、（Ａ）磁性体粉末
と、（Ｂ）２価脂肪族アルコールと芳香族ジカルボン酸
とを重縮合してなるポリエステルとを配合してなるもの
である。The present invention will be described in more detail below. The bonded magnet composition of the present invention is obtained by polycondensing (A) a magnetic powder, (B) a divalent aliphatic alcohol and an aromatic dicarboxylic acid. It is a mixture of the following polyesters.
【００１０】ここで、（Ａ）成分の磁性体粉末は、合成
樹脂磁石用として用いられているものであれば特に制限
はなく、Ｂａ系、Ｓｒ系のフェライト磁性体、Ｓｍ―Ｃ
ｏ系、Ｎｄ―Ｆｅ系などの希土類磁性体、カーボニル鉄
粉その他の金属または合金粉末、難磁性フェライトなど
任意の磁性材料を１種、或いは２種以上の組合せで利用
することができる。Here, the magnetic powder of the component (A) is not particularly limited as long as it is used for synthetic resin magnets, and Ba-based and Sr-based ferrite magnetic materials and Sm-C.
Any magnetic material such as rare earth magnetic materials such as o-based or Nd-Fe-based materials, carbonyl iron powder or other metal or alloy powder, and non-magnetic ferrite can be used alone or in combination of two or more.
【００１１】この磁性体粉末の平均粒径は０．０５〜１
００μｍ、特に０．１〜１０μｍであることが好まし
い。The average particle size of this magnetic powder is 0.05 to 1
It is preferably 00 μm, particularly preferably 0.1 to 10 μm.
【００１２】これら磁性体粉末は、そのまま使用しても
よいが、表面処理を施してもよく、表面処理剤として
は、アミノシラン系、ウレイドシラン系などのシランカ
ップリング剤、チタン系カップリング剤、アルミニウム
系カップリング剤などが用いられる。These magnetic powders may be used as they are, but may be surface-treated, and examples of the surface treatment agent include silane coupling agents such as aminosilane type and ureidosilane type, titanium type coupling agents, and titanium type coupling agents. An aluminum-based coupling agent or the like is used.
【００１３】（Ｂ）成分の２価脂肪族アルコールとして
は、下記一般式（１）で示されるものが好適である。 ＨＯ−Ｒ1−ＯＨ …（１） 式中Ｒ1は炭素数１〜５、特に炭素数２，４の２価の脂
肪族炭化水素基を示し、具体的にはエチレン基、ブチレ
ン基などが挙げられる。As the dihydric aliphatic alcohol as the component (B), those represented by the following general formula (1) are preferable. HO—R 1 —OH (1) In the formula, R 1 represents a divalent aliphatic hydrocarbon group having 1 to 5 carbon atoms, particularly 2 or 4 carbon atoms, and specifically, ethylene group, butylene group and the like. Can be mentioned.
【００１４】芳香族ジカルボン酸としては、下記一般式
（２）で示されるものが好適である。As the aromatic dicarboxylic acid, those represented by the following general formula (2) are preferable.
【００１５】[0015]
【化３】 但し、式中Ａｒはベンゼン環又はナフタレン環を示す。
この芳香族カルボン酸としては、具体的にはテレフタル
酸などが挙げられる。Embedded image However, in the formula, Ar represents a benzene ring or a naphthalene ring.
Specific examples of the aromatic carboxylic acid include terephthalic acid.
【００１６】ここで、本発明の（Ｂ）成分は、上記式
（１）の２価脂肪族アルコールと上記式（２）の芳香族
ジカルボン酸とを重縮合してなるポリエステルであり、
特にポリエチレンテレフタレート（ＰＥＴ）樹脂が好適
である。このＰＥＴ樹脂はペレットとして用いることも
できるが、粉砕して微粉末として用いることが好まし
い。粉砕方法は、特に制限されないが、液体窒素中で冷
凍粉砕する方法等を採用することができる。この場合、
ＰＥＴ樹脂の平均粒子径は０．１μｍ〜１０ｍｍ、特に
１μｍ〜１ｍｍであることが好ましい。また、数平均分
子量は３０，０００〜７０，０００、特に４０，０００
〜６０，０００であることが好ましい。The component (B) of the present invention is a polyester obtained by polycondensing the divalent aliphatic alcohol of the above formula (1) and the aromatic dicarboxylic acid of the above formula (2),
In particular, polyethylene terephthalate (PET) resin is suitable. Although this PET resin can be used as pellets, it is preferably crushed and used as fine powder. The crushing method is not particularly limited, but a method such as freezing and crushing in liquid nitrogen can be adopted. in this case,
The average particle diameter of the PET resin is preferably 0.1 μm to 10 mm, and particularly preferably 1 μm to 1 mm. The number average molecular weight is 30,000 to 70,000, and particularly 40,000.
It is preferably about 60,000.
【００１７】上記（Ａ）成分の磁性体粉末と（Ｂ）成分
の２価脂肪族アルコールと芳香族ジカルボン酸とを重縮
合してなるポリエステルとの混合割合は、（Ａ）成分９
７〜６０重量％、（Ｂ）成分３〜４０重量％、より好ま
しくは（Ａ）成分９２〜７５重量％、（Ｂ）成分８〜２
５重量％である。（Ｂ）成分が３重量％より少ないと流
動性がなくなり、成形不良となる。一方、（Ｂ）成分が
４０重量％を超えると流動性は変わらないが、磁力が弱
くなる。The mixing ratio of the magnetic powder of the component (A) and the polyester obtained by polycondensing the dihydric aliphatic alcohol and the aromatic dicarboxylic acid of the component (B) is 9
7 to 60% by weight, (B) component 3 to 40% by weight, more preferably (A) component 92 to 75% by weight, (B) component 8 to 2
5% by weight. When the amount of the component (B) is less than 3% by weight, the fluidity is lost and the molding becomes defective. On the other hand, if the content of the component (B) exceeds 40% by weight, the fluidity does not change, but the magnetic force becomes weak.
【００１８】本発明ボンド磁石用組成物の製造方法は、
磁性体粉末にポリエステルをブレンドしたのち混練押出
機を用いて溶融混合する方法を採用し得る。また、ニー
ダーを用いて混練することもできる。The method for producing the composition for a bonded magnet of the present invention comprises:
A method in which polyester is blended with the magnetic powder and then melt-mixed using a kneading extruder can be adopted. It is also possible to knead using a kneader.
【００１９】具体的には、回転刃ミキサー等を用い、必
要に応じて磁性体粉末を表面処理剤で処理した後、粉末
状のポリエステル樹脂をドライブレンドにより混合し、
これを混練押出機のホッパーに投入し加熱溶融混合して
造粒することができる。或いはドライブレンドしたもの
をニーダーに入れて加熱溶融混練し、混練物をカッティ
ング又は粉砕して造粒してもよい。Specifically, the magnetic powder is treated with a surface treating agent as needed using a rotary blade mixer or the like, and then powdered polyester resin is mixed by dry blending,
This can be charged into the hopper of a kneading extruder, heated, melted and mixed for granulation. Alternatively, the dry blended product may be put into a kneader and melt-kneaded by heating, and the kneaded product may be granulated by cutting or crushing.
【００２０】上記した方法により得られたボンド磁石用
組成物は、ペレット状又は粉砕体として造粒された組成
物を加熱し溶融した状態で射出、押出し、プレス等の各
種成形方法にて成形するに際し、磁場印加して目的とす
る製品に着磁する。印加する磁場の強さは３，０００エ
ルステッド以上が好適である。The composition for bonded magnets obtained by the above-mentioned method is molded by various molding methods such as injection, extrusion and pressing in a molten state by heating the composition which is pelletized or granulated as a pulverized body. At this time, a magnetic field is applied to magnetize the target product. The strength of the applied magnetic field is preferably 3,000 oersted or more.
【００２１】本発明のボンド磁石用組成物は、磁性体粉
末を高充填しても高い流動性を保つことができ、成形容
易で、その上、得られた成形品は耐衝撃性に優れている
のでレーザービーム型プリンター、乾式コピー機等の磁
性ロールの材料として好適に用いることができるもので
ある。The composition for bonded magnets of the present invention can maintain high fluidity even when highly filled with magnetic powder, is easy to mold, and the molded product obtained is excellent in impact resistance. Therefore, it can be suitably used as a material for a magnetic roll of a laser beam printer, a dry copying machine and the like.
【００２２】[0022]
【発明の効果】本発明のボンド磁石用組成物は、流動性
の向上により磁性体粉末を高充填した高磁力磁石の製造
が容易であり、複雑な形状に成形可能で、その上、耐衝
撃性に優れた成形品を得ることができる。EFFECTS OF THE INVENTION The composition for bonded magnets of the present invention is capable of easily producing a high magnetic force magnet having a high filling of magnetic powder due to the improvement of fluidity, and can be molded into a complicated shape. A molded article having excellent properties can be obtained.
【００２３】[0023]
【実施例】以下、実施例と比較例を示し、本発明を具体
的に説明するが、本発明は下記実施例に制限されるもの
ではない。EXAMPLES The present invention will be described below in detail with reference to examples and comparative examples, but the present invention is not limited to the following examples.
【００２４】［実施例］数平均分子量５０，０００のＰ
ＥＴ樹脂（帝人化成社製）を液体窒素中で冷凍粉砕し、
１００〜２００μｍの粉末にした。[Example] P having a number average molecular weight of 50,000
ET resin (manufactured by Teijin Kasei) is freeze-ground in liquid nitrogen,
It was made into a powder of 100 to 200 μm.
【００２５】磁性体粉末は、平均粒径１μｍのストロン
チウムフェライト（日本弁柄工業（株）製）を使用し、
このフェライトを樹脂に対して６２．６体積％（８６．
２重量％）となるように回転刃ミキサーで混合した。こ
の混合粉末を２９０℃で溶融混練した。流動性試験 上記混練物を東洋精機製作所（株）製のラボプラストミ
ル Ｒ６０型を用いて流動性を測定した。測定条件はド
ライブレンドした粉体混合物をチャンバー内に充填率８
３％で充填し、５０ｒｐｍで１０分間溶融混練した後の
混練トルク値で評価した。結果を表１に示す。トルク値
が低いほど流動性が高いことを示す。アイゾット衝撃試験 溶融混練した混練物を放冷し、クラッシャーで粗粉砕し
たものでアイゾット衝撃試験用の長さ８０ｍｍ、厚さ１
０ｍｍ、幅４ｍｍのテストピースを２９０℃で射出成形
した。このテストピースについてＪＩＳ Ｋ７１１０規
格に基づきアイゾット衝撃試験を行った。結果を表１に
示す。磁力評価試験 ３，０００エルステッド（Ｏｅ）の印加磁場中に２９０
℃で射出成形し、磁力評価用の７．９８ｍｍφ、厚さ
２．２ｍｍのテストピースを成形した。磁力測定は振動
試料式磁力計；ＢＨＶ―５５（理研電子社製）を使用し
た。結果を表１に示す。As the magnetic powder, strontium ferrite (manufactured by Nippon Benji Kogyo Co., Ltd.) having an average particle size of 1 μm is used.
62.6% by volume of this ferrite with respect to the resin (86.
2% by weight) was mixed with a rotary blade mixer. This mixed powder was melt-kneaded at 290 ° C. Fluidity test The fluidity of the above kneaded product was measured using a Labo Plastomill R60 type manufactured by Toyo Seiki Seisaku-sho, Ltd. The measurement condition was a dry blended powder mixture filled in the chamber at a filling rate of 8
It was filled with 3% and melt-kneaded at 50 rpm for 10 minutes, and evaluated by the kneading torque value. Table 1 shows the results. The lower the torque value, the higher the fluidity. Izod impact test The melted and kneaded mixture was left to cool and coarsely crushed by a crusher. Length for Izod impact test 80 mm, thickness 1
A test piece of 0 mm and a width of 4 mm was injection molded at 290 ° C. This test piece was subjected to an Izod impact test based on JIS K7110 standard. Table 1 shows the results. Magnetic force evaluation test 290 in an applied magnetic field of 3,000 Oersted (Oe)
Injection molding was carried out at ℃, and a test piece of 7.98 mmφ and a thickness of 2.2 mm for magnetic force evaluation was formed. For the magnetic force measurement, a vibrating sample magnetometer; BHV-55 (manufactured by Riken Denshi Co., Ltd.) was used. Table 1 shows the results.
【００２６】［比較例］ナイロン６樹脂粉（宇部興産社
製；数平均分子量Ｍｎ＝１０，０００）と実施例と同じ
磁性体粉末をナイロン６樹脂に対して６２．６体積％
（８８重量％）となるように混合した。得られた混合物
について溶融混練温度と射出成形温度を共に３００℃と
した以外は実施例と同様の方法で評価を行った。結果を
表１に示す。[Comparative Example] Nylon 6 resin powder (manufactured by Ube Industries, Ltd .; number average molecular weight Mn = 10,000) and the same magnetic substance powder as in the example were used in an amount of 62.6% by volume based on the nylon 6 resin.
(88% by weight). The obtained mixture was evaluated in the same manner as in Example except that the melt-kneading temperature and the injection molding temperature were both set to 300 ° C. Table 1 shows the results.
【００２７】[0027]
【表１】 [Table 1]
【００２８】表１の結果から、本発明のボンド磁石用組
成物は、高磁力を有し、流動性に優れ、耐衝撃性に優れ
た成形品を得ることができることが確認できた。From the results shown in Table 1, it was confirmed that the composition for bonded magnets of the present invention has a high magnetic force, is excellent in fluidity and can be obtained as a molded article having excellent impact resistance.
Claims (3)
（１）で示される２価脂肪族アルコールと下記一般式
（２）で示される芳香族ジカルボン酸とを重縮合してな
るポリエステル ＨＯ−Ｒ1−ＯＨ …（１） （式中、Ｒ1は炭素数１〜５の２価の脂肪族炭化水素基
を示す。） 【化１】 （式中、Ａｒはベンゼン環又はナフタレン環を示す。）
とを配合してなるボンド磁石用組成物。1. Polycondensation of (A) a magnetic powder, (B) a divalent aliphatic alcohol represented by the following general formula (1) and an aromatic dicarboxylic acid represented by the following general formula (2). Polyester HO-R 1 -OH (1) (wherein R 1 represents a divalent aliphatic hydrocarbon group having 1 to 5 carbon atoms). (In the formula, Ar represents a benzene ring or a naphthalene ring.)
A composition for a bonded magnet, which comprises:
〜６０，０００のポリエチレンテレフタレート樹脂であ
る請求項１記載のボンド磁石用組成物。2. The component (B) has a number average molecular weight of 40,000.
The composition for a bonded magnet according to claim 1, which is a polyethylene terephthalate resin of about 60,000.
成分３〜４０重量％とからなる請求項１又は２記載のボ
ンド磁石用組成物。3. (A) component 97 to 60% by weight, and (B)
The composition for a bonded magnet according to claim 1 or 2, which comprises 3 to 40% by weight of the component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7348324A JPH09165502A (en) | 1995-12-18 | 1995-12-18 | Composition for bond magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7348324A JPH09165502A (en) | 1995-12-18 | 1995-12-18 | Composition for bond magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09165502A true JPH09165502A (en) | 1997-06-24 |
Family
ID=18396272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7348324A Pending JPH09165502A (en) | 1995-12-18 | 1995-12-18 | Composition for bond magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09165502A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999018158A1 (en) * | 1997-10-03 | 1999-04-15 | Eastman Chemical Company | Magnetic polyester compositions |
| WO2005124795A1 (en) * | 2004-06-17 | 2005-12-29 | Matsushita Electric Industrial Co., Ltd. | Process for producing self-assembled rare earth-iron bonded magnet and motor utilizing the same |
-
1995
- 1995-12-18 JP JP7348324A patent/JPH09165502A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999018158A1 (en) * | 1997-10-03 | 1999-04-15 | Eastman Chemical Company | Magnetic polyester compositions |
| WO2005124795A1 (en) * | 2004-06-17 | 2005-12-29 | Matsushita Electric Industrial Co., Ltd. | Process for producing self-assembled rare earth-iron bonded magnet and motor utilizing the same |
| JPWO2005124795A1 (en) * | 2004-06-17 | 2008-04-17 | 松下電器産業株式会社 | Manufacturing method of self-assembled rare earth-iron bond magnet and motor using the same |
| JP4525678B2 (en) * | 2004-06-17 | 2010-08-18 | パナソニック株式会社 | Manufacturing method of self-assembled rare earth-iron bond magnet and motor using the same |
| US7967919B2 (en) | 2004-06-17 | 2011-06-28 | Panasonic Corporation | Process for producing self-assembled rare earth-iron bonded magnet and motor utilizing the same |
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