JPH02127465A - Polyamide resin composition - Google Patents
Polyamide resin compositionInfo
- Publication number
- JPH02127465A JPH02127465A JP63280907A JP28090788A JPH02127465A JP H02127465 A JPH02127465 A JP H02127465A JP 63280907 A JP63280907 A JP 63280907A JP 28090788 A JP28090788 A JP 28090788A JP H02127465 A JPH02127465 A JP H02127465A
- Authority
- JP
- Japan
- Prior art keywords
- resin composition
- polyamide resin
- soft ferrite
- turntables
- molded
- 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.)
- Granted
Links
- 239000011342 resin composition Substances 0.000 title claims abstract description 15
- 229920006122 polyamide resin Polymers 0.000 title claims abstract description 13
- 229910001035 Soft ferrite Inorganic materials 0.000 claims abstract description 14
- 229910018605 Ni—Zn Inorganic materials 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 4
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 abstract description 3
- 229920000299 Nylon 12 Polymers 0.000 abstract description 3
- 229920002292 Nylon 6 Polymers 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 239000008188 pellet Substances 0.000 description 5
- 239000007822 coupling agent Substances 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は電気、電子機器用のターンテーブル、シェーバ
−キャップ、装飾用ボタン等の精密成形に適したポリア
ミド樹脂組成物およびこの樹脂組成物を用いて成形した
電気、電子機器用ターンテーブルに関する。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a polyamide resin composition suitable for precision molding of turntables, shaver caps, decorative buttons, etc. for electrical and electronic equipment, and a polyamide resin composition that is suitable for precision molding of turntables, shaver caps, decorative buttons, etc. for electrical and electronic equipment, and the use of this resin composition. This invention relates to a turntable for electrical and electronic equipment molded using the same.
（従来技術および課題）
近年の電気、電子機器の小形化、軽量化、薄形化の傾向
に伴ない、成形性、寸法精度の優れた熱可塑性樹脂が求
められている。又ＣＤプレーヤーＬＤプレーヤーおよび
それらに間する音響、映像機器に使われるターンテーブ
ルなど、磁石に吸引される性質を有し、かつ、残留磁気
束密度が小さく磁化しにくい性質を有する部品の需要が
増えている。これらの分野では製品の性能面から、特に
高い精密成形性が要求されるが、まだ十分に満足できる
材料がないのが現状である。(Prior Art and Problems) With the recent trend toward smaller, lighter, and thinner electrical and electronic devices, thermoplastic resins with excellent moldability and dimensional accuracy are required. In addition, there is an increasing demand for parts that are attracted to magnets and have low residual magnetic flux density and are difficult to magnetize, such as turntables used in CD players, LD players, and audio and video equipment connected to them. ing. In these fields, particularly high precision moldability is required from the standpoint of product performance, but there is currently no material that satisfies this requirement.
本発明者は、磁石に吸引される性質を有し、残留磁束密
度の小さい部品を高い寸法精度で成形できる材料を鋭意
研究の結果、ポリアミド樹脂にソフトフェライトを配合
した樹脂組成物が優れた精密成形性を示すことを見い出
し本発明を完成した。As a result of intensive research into materials that have the property of being attracted to magnets and can mold parts with low residual magnetic flux density with high dimensional accuracy, the inventor found that a resin composition containing soft ferrite in polyamide resin has excellent precision. The present invention was completed by discovering that it exhibits moldability.
（課題を解決するための手段）
本発明はポリアミド樹脂に対し７６〜９５重量％のソフ
トフェライトを配合してなる高精密成形用ポリアミド樹
脂組成物およびこの樹脂組成物を用いて成形した精密成
形品、特に電気、電子機器用ターンテーブルである。(Means for Solving the Problems) The present invention provides a polyamide resin composition for high-precision molding, which is a polyamide resin mixed with 76 to 95% by weight of soft ferrite, and a precision molded article molded using this resin composition. , especially turntables for electrical and electronic equipment.
本発明で用いられるポリアミド樹脂としては、ナイロン
６．６６．６１０．６１２．１１．１２およびこれらを
主成分とする共重合体が挙げられが、ナイロン１２が特
に優れた結果が得られる。Examples of the polyamide resin used in the present invention include nylon 6.66.610.612.11.12 and copolymers containing these as main components, and particularly excellent results are obtained with nylon 12.
本発明で用いられるソフトフェライトとしてはＭｎ−Ｚ
ｎ系、Ｎｉ−Ｚｎ系、Ｃｕ−Ｚｎ系、Ｍｇ−Ｚｎ系等が
挙げられるが、Ｍｎ−Ｚｎ系又はＮｉ−Ｚｎ系ソフトフ
ェライトの使用が好ましい、これらのソフトフェライト
は予めシラン系カップリング剤、チタン系カップリング
剤、有機リン化合物系カップリング剤、クロム・メタク
リレート系カップリング剤その他のカップリング剤で処
理しておくのが望ましい。The soft ferrite used in the present invention is Mn-Z
Examples include n-based, Ni-Zn-based, Cu-Zn-based, Mg-Zn-based soft ferrites, but it is preferable to use Mn-Zn-based or Ni-Zn-based soft ferrites. , a titanium-based coupling agent, an organic phosphorus compound-based coupling agent, a chromium/methacrylate-based coupling agent, or other coupling agent.
これらのソフトフェライトは、熱伝導性に優れているた
め成形金型の細部の温度分布を均一化する働きをするこ
と、また微粉末でかつ粒度分布が広いのでポリアミドと
の均一混練が容易であること、さらには粒子の形状が不
定形であることなどにより、精密成形において優れた結
果が得られるものと考えられる。These soft ferrites have excellent thermal conductivity, so they work to equalize the temperature distribution in the details of the mold, and because they are fine powders and have a wide particle size distribution, they can be uniformly kneaded with polyamide. It is thought that excellent results can be obtained in precision molding due to this fact and also because the shape of the particles is amorphous.
本発明におけるポリアミド樹脂に対するソフトフェライ
トの配合比は、７６〜９５重量％の範囲であり、７６〜
９０ｆ！量％の範囲が最も好ましい。The blending ratio of soft ferrite to polyamide resin in the present invention is in the range of 76 to 95% by weight, and is in the range of 76 to 95% by weight.
90f! A range of % by weight is most preferred.
７５重量％以下では十分な磁石への吸引力が不足し、ま
た高い寸法精度が得られない。９５重量％以上では成形
性が著しく悪くなる。If it is less than 75% by weight, sufficient attraction force to the magnet is insufficient, and high dimensional accuracy cannot be obtained. If it exceeds 95% by weight, moldability will be significantly impaired.
本発明の樹脂組成物は、ポリアミド樹脂ベレット又は粉
末とソフトフェライト粉末とを混合したのち、押出機で
混練押出しペレット化される。又本発明の樹脂組成物に
は、安定剤、紫外線吸収剤、滑剤、着色剤など通常用い
られる各種の樹脂添加剤を添加することができる。The resin composition of the present invention is obtained by mixing a polyamide resin pellet or powder and soft ferrite powder, and then kneading and extruding the mixture into pellets using an extruder. Furthermore, various commonly used resin additives such as stabilizers, ultraviolet absorbers, lubricants, and colorants can be added to the resin composition of the present invention.
本発明の樹脂組成物は、射出成形法、押出成形法、圧縮
成形法、回転成形性等公知の各種の成形法により成形さ
れる。The resin composition of the present invention is molded by various known molding methods such as injection molding, extrusion molding, compression molding, and rotary molding.
（発明の効果）
本発明の樹脂組成物による成形品は、寸法精度が高くパ
リやひげが極めて少ない、またソフトフェライトが高充
填にもかかわらず、成形条件の幅が広く、射出成形が容
易に可能である。電気、電子機器用ターンテーブルに使
用すると、モーターシャフトの挿入孔内径の寸法精度お
よび面ぶれ精度に優れ、極めて高い信号読み取り精度を
要求する高性能のＣＤプレーヤーやＬＤプレーヤー等の
用途に適している。(Effects of the Invention) Molded products made from the resin composition of the present invention have high dimensional accuracy, have extremely few cracks and whiskers, and despite being highly filled with soft ferrite, can be molded under a wide range of molding conditions and can be easily injection molded. It is possible. When used in turntables for electrical and electronic equipment, it has excellent dimensional accuracy and surface runout accuracy for the inner diameter of the motor shaft insertion hole, making it suitable for applications such as high-performance CD players and LD players that require extremely high signal reading accuracy. .
本発明の樹脂組成物は、このほか高精密成形性の要求さ
れるシェバーのキャップ、装飾用ボタンその他各種の用
途に使用され得る。In addition, the resin composition of the present invention can be used for various purposes such as shaver caps, decorative buttons, etc., which require high precision moldability.
（実施例） 以下に実施例により本発明をさらに詳しく説明する。(Example) The present invention will be explained in more detail with reference to Examples below.
実施例 １
ナイロン１２（ダイセル・ヒュルス製：ダイアミドＬ１
６４０Ｐ）に対しＭｎ−Ｚｎｎ系ラフ−フェライト（戸
田工業製：ＫＮＳ４１５）を８８重量％配合し、ヘンシ
ェルミキサーで混合後二軸押出機で押出してペレット化
した。Example 1 Nylon 12 (Daicel-Hüls: Diamid L1)
640P) was blended with 88% by weight of Mn-Znn rough ferrite (manufactured by Toda Kogyo: KNS415), mixed with a Henschel mixer, and then extruded with a twin-screw extruder to pelletize.
このベレットを用い射出成形機（東芝製）で図１に示し
たＣＤプレーヤー用のターンテーブルを１０個成形し、
そのシャフト挿入孔内径を上中下の三か所で測定した。Using this pellet, 10 turntables for CD players as shown in Figure 1 were molded using an injection molding machine (manufactured by Toshiba).
The inner diameter of the shaft insertion hole was measured at three locations: top, middle, and bottom.
測定結果を表１に示す。The measurement results are shown in Table 1.
ヒゲはみられず、シャフト挿入孔径の安定度は極めて高
い。There are no whiskers, and the shaft insertion hole diameter is extremely stable.
実施例 ２
ナイロン６（宇部興産製： ＵＢＥナイロン１０１３
）対しＮｉ−Ｚｎ系ソフトフェライト（戸田工業製）を
９０％配合しヘンシェルミキサーで混合後二軸押出機で
押出してペレット化した。Example 2 Nylon 6 (manufactured by UBE Industries: UBE Nylon 1013)
) was mixed with 90% Ni-Zn soft ferrite (manufactured by Toda Kogyo) using a Henschel mixer and then extruded using a twin-screw extruder to pelletize.
このベレットを用い射出成形機（東芝製）で図１に示し
たＣＤプレーヤー用のターンテーブルを１０個成形し、
そのシャフト挿入孔内径を上中下の三か所で測定した。Using this pellet, 10 turntables for CD players as shown in Figure 1 were molded using an injection molding machine (manufactured by Toshiba).
The inner diameter of the shaft insertion hole was measured at three locations: top, middle, and bottom.
測定結果を表１に示す。The measurement results are shown in Table 1.
シャフト挿入孔径の安定度は高い。The shaft insertion hole diameter has high stability.
比較例
グラスファイバーを３０重量％配合したポリカーボネー
ト（三菱ガス化学製ニューピロンＧ５−２０３０Ｍ）の
ベレットを用いて、射出成形機（東芝製）で図１に示し
たＣＤプレーヤー用のターンテーブルを１０個成形し、
そのシャフト挿入孔内径を上中下の三か所で測定した。Comparative Example Ten turntables for CD players as shown in Figure 1 were made using an injection molding machine (manufactured by Toshiba) using a pellet made of polycarbonate (Nupilon G5-2030M manufactured by Mitsubishi Gas Chemical) containing 30% by weight of glass fiber. Molded,
The inner diameter of the shaft insertion hole was measured at three locations: top, middle, and bottom.
結果を表１に示す、ヒケがみられ、シャフト挿入孔径の
安定度は低い。The results are shown in Table 1. Sink marks were observed, and the stability of the shaft insertion hole diameter was low.
図１は実施例および比較例において成形したＣＤプレー
ヤー用のターンテーブルの側面図および断面図である。FIG. 1 is a side view and a sectional view of turntables for CD players molded in Examples and Comparative Examples.
Claims (1)
樹脂組成物。 ２ 請求項１記載の樹脂組成物よりなる電気、電子機器
用ターンテーブル。[Claims] 1. A resin composition comprising polyamide resin mixed with soft ferrite. 2. A turntable for electrical or electronic equipment comprising the resin composition according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63280907A JP2538326B2 (en) | 1988-11-07 | 1988-11-07 | Turntable for electrical and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63280907A JP2538326B2 (en) | 1988-11-07 | 1988-11-07 | Turntable for electrical and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02127465A true JPH02127465A (en) | 1990-05-16 |
| JP2538326B2 JP2538326B2 (en) | 1996-09-25 |
Family
ID=17631606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63280907A Expired - Fee Related JP2538326B2 (en) | 1988-11-07 | 1988-11-07 | Turntable for electrical and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2538326B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2252027A (en) * | 1991-01-18 | 1992-07-22 | Jae Chul Choi | Oven shelf for a microwave heating oven |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60130104A (en) * | 1983-12-19 | 1985-07-11 | Daiseru Hiyurusu Kk | Magnetic composition |
| JPS60173052A (en) * | 1984-02-20 | 1985-09-06 | Mitsui Toatsu Chem Inc | Resin composition |
-
1988
- 1988-11-07 JP JP63280907A patent/JP2538326B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60130104A (en) * | 1983-12-19 | 1985-07-11 | Daiseru Hiyurusu Kk | Magnetic composition |
| JPS60173052A (en) * | 1984-02-20 | 1985-09-06 | Mitsui Toatsu Chem Inc | Resin composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2252027A (en) * | 1991-01-18 | 1992-07-22 | Jae Chul Choi | Oven shelf for a microwave heating oven |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2538326B2 (en) | 1996-09-25 |
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