JPS63185005A - Permanent magnet - Google Patents
Permanent magnetInfo
- Publication number
- JPS63185005A JPS63185005A JP1617387A JP1617387A JPS63185005A JP S63185005 A JPS63185005 A JP S63185005A JP 1617387 A JP1617387 A JP 1617387A JP 1617387 A JP1617387 A JP 1617387A JP S63185005 A JPS63185005 A JP S63185005A
- Authority
- JP
- Japan
- Prior art keywords
- ferromagnetic powder
- metal salt
- acid ester
- hydroxybenzoic acid
- stearic acid
- 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
- 239000000843 powder Substances 0.000 claims abstract description 30
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 28
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 14
- -1 hydroxybenzoic acid ester Chemical class 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 150000003839 salts Chemical class 0.000 claims abstract description 10
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 9
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 7
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000008117 stearic acid Substances 0.000 claims abstract description 7
- 230000005291 magnetic effect Effects 0.000 abstract description 30
- 239000000203 mixture Substances 0.000 abstract description 12
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 9
- 239000008116 calcium stearate Substances 0.000 description 9
- 235000013539 calcium stearate Nutrition 0.000 description 9
- 238000001746 injection moulding Methods 0.000 description 9
- 238000000465 moulding Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000006247 magnetic powder Substances 0.000 description 3
- 229910052712 strontium Inorganic materials 0.000 description 3
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 229940106004 2-ethylhexyl benzoate Drugs 0.000 description 1
- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- AGXUVMPSUKZYDT-UHFFFAOYSA-L barium(2+);octadecanoate Chemical compound [Ba+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O AGXUVMPSUKZYDT-UHFFFAOYSA-L 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- FRKHZXHEZFADLA-UHFFFAOYSA-L strontium;octadecanoate Chemical compound [Sr+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O FRKHZXHEZFADLA-UHFFFAOYSA-L 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔従来の技術及び問題点〕
塩素化ポリエチレン、ポリ塩化ビニル、合成ゴムあるい
はエチレン−酢酸ビニル共重合体などに強磁性粉末を混
合し、それを熱間ロールでシート状にするかあるいは射
出成形することによって、いわゆるゴム磁石あるいは樹
脂磁石を製造することは周知である。これらゴム磁石あ
るいは樹脂磁石において、磁気特性を向上させるために
は磁性粉末の含有量を増加させること及び、！ｉ磁性体
粉末一定の方向に配向させ、異方性をあたえることが必
要である。しかし磁性体粉末の含有Ｒを増加してやると
成形された製品の機械的な特性が低下するとともに溶融
混練物の流れが悪くなるので、成形不可能になるなどの
欠点がある。さらに、射出成形機等の摩耗間も多くなり
成形機の寿命が短かくなるのみならず、成形物中に不純
物が混入し品質を低下させるなどの欠点もある。[Detailed Description of the Invention] [Prior Art and Problems] Ferromagnetic powder is mixed with chlorinated polyethylene, polyvinyl chloride, synthetic rubber, or ethylene-vinyl acetate copolymer, and the mixture is hot-rolled into a sheet. It is well known to produce so-called rubber or plastic magnets by molding or injection molding. In order to improve the magnetic properties of these rubber magnets or resin magnets, it is necessary to increase the content of magnetic powder and! i It is necessary to orient the magnetic powder in a certain direction and give it anisotropy. However, if the content R of the magnetic powder is increased, the mechanical properties of the molded product will deteriorate and the flow of the melt-kneaded product will deteriorate, resulting in disadvantages such as the inability to mold the product. Furthermore, the injection molding machine and the like have many wear intervals, which not only shortens the life of the molding machine, but also has drawbacks such as impurities entering the molded product and deteriorating its quality.
（問題点を解決するための手段）
本発明は強磁性粉末とポリアミド樹脂とを主成分とする
組成物にヒドロキシ安息香酸エステルとステアリン酸金
属塩とを添加含有させることによって上述のような欠点
・問題点を解決した。(Means for Solving the Problems) The present invention solves the above-mentioned drawbacks by adding hydroxybenzoic acid ester and stearic acid metal salt to a composition mainly composed of ferromagnetic powder and polyamide resin. Solved the problem.
すなわち本発明は、強磁性粉末とポリアミド樹脂を主成
分とし、ヒドロキシ安息香酸エステルとステアリン酸金
属塩とが添加含有されており、前記強磁性粉末が配向し
ていることを特徴とする特久磁石に関する。That is, the present invention provides a special-purpose magnet characterized in that the main components are ferromagnetic powder and polyamide resin, hydroxybenzoic acid ester and stearic acid metal salt are added thereto, and the ferromagnetic powder is oriented. Regarding.
本発明に用いる強磁性粉末としてはストロンチウムフェ
ライトやバリウムフェライトなどが例示され、六方晶形
をしていて、磁気異方性を有し、磁界を印加することに
より配向する性質をもっている。Examples of the ferromagnetic powder used in the present invention include strontium ferrite and barium ferrite, which have a hexagonal crystal shape, have magnetic anisotropy, and have the property of being oriented by applying a magnetic field.
強磁性粉末と樹脂との混線物において、強磁性粉末を磁
界配向させるためには、使用する樹脂の溶融粘度が小さ
く、樹脂中で強磁性粉末が磁界方向に回転するときに受
ける抵抗の少ないことが望ましく、また、強磁性粉末間
の接触抵抗が少なく、互いに滑りやすいことが必要であ
る。In a mixed product of ferromagnetic powder and resin, in order to orient the ferromagnetic powder in the magnetic field, the resin used must have a low melt viscosity, and the ferromagnetic powder must receive little resistance when rotating in the direction of the magnetic field in the resin. It is desirable that the ferromagnetic powders have low contact resistance and that they can easily slide against each other.
本発明で用いるヒドロキシ安息香酸エステルとを有して
も良い炭素数４〜２０の脂肪族アルキル基）である。An aliphatic alkyl group having 4 to 20 carbon atoms which may have a hydroxybenzoic acid ester used in the present invention.
具体的には、Ｐ−ヒドロキシ−２−エチルヘキシル安息
香酸エステルなどが例示できる。 具体的には、Ｐ−ヒ
ドロキシ−２−エチルヘキシル安急香酸エステルなどが
例示できる。Specifically, P-hydroxy-2-ethylhexylbenzoate and the like can be exemplified. A specific example is P-hydroxy-2-ethylhexyl benzyl ester.
推奨すべきステアリン酸金属塩としてはステアリン酸カ
ルシウム、ステアリン酸マグネシウム、ステアリン酸ス
トロンチウム、ステアリン酸バリウムあるいはステアリ
ン酸亜鉛の一種または二種以上である。ステアリン酸金
属塩およびヒドロキシ安息香酸エステルの添加最が増加
するに従って、前述した効果は増大するが、逆に、成形
物の機械的強度が低下し、割れやすくなるため、これら
の添加合有最はそれぞれ金石の０．１〜１，５重量％で
あることが望ましい。Recommended metal stearate salts include one or more of calcium stearate, magnesium stearate, strontium stearate, barium stearate, and zinc stearate. As the amount of metal stearate and hydroxybenzoate ester added increases, the above-mentioned effects increase; Preferably, each content is 0.1 to 1.5% by weight of goldstone.
ステアリン酸金属塩とヒドロキシ安息香酸エステルのい
ずれか一方を単独で使用する場合は前述の効果は少なく
、二つを同時に添加含有させると顕著な効果が現われる
。When either the stearate metal salt or the hydroxybenzoate ester is used alone, the above-mentioned effect is small, but when the two are added and contained at the same time, a remarkable effect appears.
又、強磁性粉末の含有伍は、令聞に対して、９５〜７０
重母％好ましくは、９１〜８５重量％である。In addition, the content of ferromagnetic powder is 95 to 70
Weight percentage is preferably 91 to 85% by weight.
ポリアミド樹脂としてはポリアミド６．１１゜１２．６
・６，６・１ｏ、６・１２及びそれらの共重合物から選
ばれた１種又は２種以上のポリアミドである。As polyamide resin, polyamide 6.11°12.6
- One or more polyamides selected from 6, 6, 1o, 6, 12, and copolymers thereof.
本発明のポリアミド樹脂組成物は次のような効果を有す
る。The polyamide resin composition of the present invention has the following effects.
（１）強磁性粉末間および強磁性粉末と樹脂との間の摩
擦抵抗が減少し、外部磁界を印加したときに、強磁性粉
末が磁界方向に配向することになるので磁界特性が向上
する。(1) The frictional resistance between the ferromagnetic powders and between the ferromagnetic powder and the resin is reduced, and when an external magnetic field is applied, the ferromagnetic powders are oriented in the direction of the magnetic field, so the magnetic field characteristics are improved.
（２）混練物を射出成形機を使用して成形する場合に、
強磁性粉末とポリアミド樹脂との混練溶融物の流動性が
高いために、多量の強磁性粉末が含有されていても、そ
れらの配向性がよく、そのために磁気特性が向上する。(2) When molding the kneaded material using an injection molding machine,
Since the kneaded melt of ferromagnetic powder and polyamide resin has high fluidity, even if a large amount of ferromagnetic powder is contained, the orientation thereof is good, and therefore the magnetic properties are improved.
（３）成形機壁面と混線物との摩擦係数が小さくなり、
成形機の摩耗が非常に少なくなり、成形機の寿命が長く
なる。さらに、成形物中に鉄粉などの摩耗物が混入する
ことが少なくなり、成形物の品質が向上する。(3) The coefficient of friction between the molding machine wall and the interfering object is reduced,
The wear of the molding machine is greatly reduced and the life of the molding machine is extended. Furthermore, the mixing of abrasive materials such as iron powder into the molded product is reduced, and the quality of the molded product is improved.
また、本発明によって得られた成形物は１５０℃以上の
高温度下に長時間放置しても磁気特性および形状などに
変化を生じることがなく、優れた耐熱性を示し、ヒドロ
キシ安息香酸エステルとステアリン酸金属塩を添加した
ことによる耐熱性の劣化が認められない。In addition, the molded product obtained by the present invention does not change its magnetic properties or shape even if left at high temperatures of 150°C or higher for a long time, exhibits excellent heat resistance, and has excellent heat resistance. No deterioration in heat resistance was observed due to the addition of stearate metal salt.
次に実施例をあげて説明する。磁気特性については残留
磁束密度（Ｂｒ）、保磁力（Ｎｔｃ）および最大エネル
ギー積（（ＢＨ）ｍａｘ）強磁性粉末の配向度（Ｐ）に
ついて記した。配向度は、配向方向の残留磁束密度（Ｂ
ｒａ）と配向方向に直交する方向の残留磁束密度（Ｂｒ
ｂ）で次式によって算出した。Next, an example will be given and explained. Regarding magnetic properties, residual magnetic flux density (Br), coercive force (Ntc), maximum energy product ((BH)max), and degree of orientation (P) of the ferromagnetic powder were described. The degree of orientation is determined by the residual magnetic flux density (B
ra) and the residual magnetic flux density (Br
b) was calculated using the following formula.
Ｂｒａ
Ｐ −１００ｘ□
Ｂｒａ＋Ｂｒｂ
〔実施例１〕
第１表Ａに示す配合比率で、平均粒子径１．３μｍのス
トロンチウムフェライト粉末、平均分子ｆｆ１３５００
０のポリアミド６、ｐ−ヒドロキシ−２−エチルヘキシ
ル安息香酸エステル（以下Ｅ ＨＰＢと略す）およびス
テアリン酸カルシウムからなる組成物を調整し、加圧ニ
ーダ−を用いて浦融混練した後、３〜５ｍｍの大きさに
粉砕して成形用混線ベレットを得た。Bra P -100x□ Bra+Brb [Example 1] Strontium ferrite powder with an average particle diameter of 1.3 μm and an average molecular weight of ff 13500 at the blending ratio shown in Table 1 A
A composition consisting of polyamide 6, p-hydroxy-2-ethylhexylbenzoic acid ester (hereinafter abbreviated as E HPB) and calcium stearate was prepared and kneaded using a pressure kneader. It was pulverized to a size to obtain a mixed wire pellet for molding.
第１図に示すような金型および射出成形機を使用し、ノ
ズル温度を２７０℃に保ち、金型キャビティ一部に７０
００エルスチツドの磁界を印加した状態で、射出成形し
、９Ｑｍｍ（外径）、８０ａ＋ｉ（内径）、１７ｍｍ（
高さ）の放射状に配向したリング形状物を得た。Using a mold and injection molding machine as shown in Figure 1, the nozzle temperature was kept at 270°C, and a part of the mold cavity was heated to 70°C.
Injection molded with a magnetic field of 00 oerstide applied, 9Qmm (outer diameter), 80a+i (inner diameter), 17mm (
A radially oriented ring-shaped object of height) was obtained.
得られた成形物の磁界方向のＢ−Ｈ特性を測定した結果
を第１表已に示す。表から明らかなように、ステアリン
酸カルシウムとヒドロキシ安息香酸エステルを含有する
組成物（１〜６）は、射出成形が可能であり、成形物の
磁気特性および配向度も良好なものである。しかし、ス
テアリン酸カルシウムとＥＨＰＢを含有しない組成（７
〜１２）は、成形不可能なものであった。また１と７を
比較すると、ステアリン酸カルシウムとＥＨＰＢを含有
することにより、フェライト粉末の配向度が向上し、磁
気特性が向上していることがわかる。The results of measuring the B-H characteristics of the obtained molded product in the direction of the magnetic field are shown in Table 1. As is clear from the table, the compositions (1 to 6) containing calcium stearate and hydroxybenzoic acid ester can be injection molded, and the molded products have good magnetic properties and a good degree of orientation. However, a composition that does not contain calcium stearate and EHPB (7
-12) were unmoldable. Comparing No. 1 and No. 7, it can be seen that the inclusion of calcium stearate and EHPB improves the degree of orientation of the ferrite powder and improves the magnetic properties.
このようにＥＨＰＢとステアリン酸カルシウムを含有さ
せることによって、より多量の強磁性粉末を含有した状
態での射出成形が可能となる。さらに、強磁性粉末の配
向性が向上するなどの効果により、磁気特性の優れた永
久磁石を得ることができる。By containing EHPB and calcium stearate in this manner, injection molding can be performed in a state containing a larger amount of ferromagnetic powder. Furthermore, due to effects such as improved orientation of the ferromagnetic powder, a permanent magnet with excellent magnetic properties can be obtained.
また成形物を１５０℃の高温中に２４０時間放置した後
の磁気特性および形状は、初期値と全く同じであり、良
好な耐熱性を示した。Furthermore, the magnetic properties and shape of the molded product after being left in a high temperature of 150° C. for 240 hours were exactly the same as the initial values, indicating good heat resistance.
〔実施例２〕
第２表Ａに示すように、種々の組成物を調整し、実施例
１と同じ方法で温練した後粉砕し、実施例１と同じ方法
で射出成形をした。得られた成形物の特性を第２表Ｂに
示す。[Example 2] As shown in Table 2 A, various compositions were prepared, kneaded and ground in the same manner as in Example 1, and then injection molded in the same manner as in Example 1. The properties of the molded product obtained are shown in Table 2B.
第２表Ｂより明らかなように、ＥＨＰＢとステアリン酸
カルシウムの含有■を増加させるに従って、成形物の配
向度および磁気特性が向上する。As is clear from Table 2 B, as the content (2) of EHPB and calcium stearate increases, the degree of orientation and magnetic properties of the molded product improve.
しかし圧縮破壊強度（成形物直径方向破壊強度）は逆に
低下する傾向があり、ＥＨＰＢ２．０重囲％とステアリ
ン酸カルシウム２．０重ｆｊ１％を含有した組成（２０
）の場合に非常に低くなる。However, the compressive fracture strength (fracture strength in the diametrical direction of the molded product) tends to decrease, and the composition containing 2.0% EHPB and 2.0% calcium stearate (20
) becomes very low.
またステアリン酸カルシウム単独の場合（２１）および
ＥＨＰＢ単独の場合（２２）よりも、その両方を同時に
含有した場合（１６）の方が成形物の配向性および磁気
特性が良好であることから、ステアリン酸カルシウムと
ＥＨＰＢを添加含有させることにより強磁性粉末の配向
度が向上し、相乗効果が現われることがわかる。Furthermore, the orientation and magnetic properties of the molded product were better when both were contained at the same time (16) than when calcium stearate was used alone (21) and when EHPB was used alone (22). It can be seen that by adding and containing EHPB, the degree of orientation of the ferromagnetic powder is improved and a synergistic effect appears.
〔実施例３〕
第３表Ａに示すようなストロンチウムフェライト、バリ
ウムフェライト、ポリアミド樹脂、ステアリン酸金属塩
およびＥＨＰＢの種々の組成物を調整し、実施例１と同
様な方法で成形物を得た。[Example 3] Various compositions of strontium ferrite, barium ferrite, polyamide resin, stearate metal salt and EHPB as shown in Table 3A were prepared, and molded products were obtained in the same manner as in Example 1. .
それぞれの組成について成形性および成形物の特性を第
３表Ｂに示す。Table 3B shows the moldability and properties of molded products for each composition.
第３表８から明らかなように、ステアリン酸金尺塩およ
びＥＨＰＢを含有しない組成物（３０゜３１．３２）の
場合には成形材料の流動性が悪く、金型への成形材料の
充填が不十分で成形不可能でぁるがステアリン酸金属塩
とＥ ＨＰ Ｂを含有した組成物の場合には成形性が良
好で、強磁性粉末の配向性も優れ、（Ｂ Ｈ） ｍａｘ
等の磁気特性が良好であった。As is clear from Table 3, in the case of the composition (30°31.32) that does not contain stearate and EHPB, the fluidity of the molding material is poor, making it difficult to fill the mold with the molding material. However, in the case of a composition containing stearic acid metal salt and E HP B, the moldability is good and the orientation of the ferromagnetic powder is also excellent, and (B H) max
The magnetic properties were good.
第１図は、本発明にかかる永久磁石を製造するための射
出成形中と金型の一例の要部断面図である。
１・・・射出成形該ノズル
２・・・射出成形機可動盤
３・・・射出成形機可動盤
４ａ・・・可動側の非磁性質よりなる金型型板４ｂ・・
・可動側の磁性質よりなる金型型板４Ｃ・・・可動側の
非磁性質よりなる金型型板４ｄ・・・固定側の磁性質よ
りなる金型型板４ｅ・・・固定側の非磁性質よりなる金
型型板４ｆ・・・可動側の磁性質よりなる金型型板５・
・・電磁石用巻線コイル
６・・・スプールおよびランナー
７・・・キャビティーFIG. 1 is a sectional view of essential parts of an example of injection molding and a mold for producing a permanent magnet according to the present invention. 1... Injection molding nozzle 2... Injection molding machine movable plate 3... Injection molding machine movable plate 4a... Mold template plate 4b made of non-magnetic material on the movable side...
・Mold template plate 4C of magnetic properties on the movable side...Mold template plate 4d of non-magnetic properties on the movable side...Mold template plate 4e of magnetic properties on the fixed side...Mold template plate 4e of magnetic properties on the fixed side... Mold template plate 4f made of non-magnetic properties... Mold plate plate 5 made of magnetic properties on the movable side.
...Electromagnet winding coil 6...Spool and runner 7...Cavity
Claims (2)
ロキシ安息香酸エステルとステアリン酸金属塩とが添加
含有されており、前記強磁性粉末が配向していることを
特徴とする永久磁石。(1) A permanent magnet comprising ferromagnetic powder and polyamide resin as main components, further containing hydroxybenzoic acid ester and stearic acid metal salt, and characterized in that the ferromagnetic powder is oriented.
量％およびステアリン酸金属塩が０．１〜１．５重量％
含まれていることを特徴とする特許請求の範囲第一項記
載の永久磁石。(2) 0.1-1.5% by weight of hydroxybenzoic acid ester and 0.1-1.5% by weight of metal stearate
A permanent magnet according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1617387A JPS63185005A (en) | 1987-01-28 | 1987-01-28 | Permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1617387A JPS63185005A (en) | 1987-01-28 | 1987-01-28 | Permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63185005A true JPS63185005A (en) | 1988-07-30 |
Family
ID=11909118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1617387A Pending JPS63185005A (en) | 1987-01-28 | 1987-01-28 | Permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63185005A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008019005A (en) * | 2002-02-08 | 2008-01-31 | Graphic Packaging Internatl Inc | Insulating microwave interactive packaging |
| US7982168B2 (en) | 2004-08-25 | 2011-07-19 | Graphic Packaging International, Inc. | Absorbent microwave interactive packaging |
| US8993947B2 (en) | 2007-02-08 | 2015-03-31 | Graphic Packaging International, Inc. | Microwave energy interactive insulating sheet and system |
-
1987
- 1987-01-28 JP JP1617387A patent/JPS63185005A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008019005A (en) * | 2002-02-08 | 2008-01-31 | Graphic Packaging Internatl Inc | Insulating microwave interactive packaging |
| US7982168B2 (en) | 2004-08-25 | 2011-07-19 | Graphic Packaging International, Inc. | Absorbent microwave interactive packaging |
| US8993947B2 (en) | 2007-02-08 | 2015-03-31 | Graphic Packaging International, Inc. | Microwave energy interactive insulating sheet and system |
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