JPH0717784B2 - Thermoplastic resin composition - Google Patents
Thermoplastic resin compositionInfo
- Publication number
- JPH0717784B2 JPH0717784B2 JP2024799A JP2479990A JPH0717784B2 JP H0717784 B2 JPH0717784 B2 JP H0717784B2 JP 2024799 A JP2024799 A JP 2024799A JP 2479990 A JP2479990 A JP 2479990A JP H0717784 B2 JPH0717784 B2 JP H0717784B2
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- weight
- inorganic powder
- resin composition
- particle size
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、熱可塑性樹脂に無機粉末を高充填した射出成
形用材料に係り、電気電子部品や機械部品等に好適な高
比重，高強度，高剛性で、且つ優れた成形性を有する熱
可塑性樹脂組成物に関するものである。TECHNICAL FIELD The present invention relates to an injection molding material in which a thermoplastic resin is highly filled with an inorganic powder, and has a high specific gravity and a high strength suitable for electric and electronic parts, machine parts and the like. The present invention relates to a thermoplastic resin composition having high rigidity and excellent moldability.
（従来の技術） 従来、無機粉末を高充填した組成物としては、熱可塑性
樹脂にフェライトやコバルト合金等の磁性粉末を配合し
た、所謂、プラスチックマグネット用樹脂組成物がよく
知られている。又、金属粉末を高充填し、高比重性や導
電性を付与した樹脂組成物も多くの産業分野で広く使用
されている。例えば、特開昭56−159248号公報では、ポ
リテトラメチレンテレフタレートに銅，鉄，ニッケル，
アルミニウム，金等の金属粉末を配合した高比重で、且
つ成形性，熱伝導性に優れた樹脂組成物が示されてい
る。又、特公昭61−11261号公報には、熱可塑性樹脂に
平均粒径８μｍ〜40μｍの亜鉛粉末を配合した高比重熱
可塑性樹脂組成物の製造方法が挙げられている。(Prior Art) Conventionally, as a composition highly filled with an inorganic powder, a so-called resin composition for a plastic magnet, which is a thermoplastic resin mixed with magnetic powder such as ferrite or cobalt alloy, is well known. Further, a resin composition which is highly filled with metal powder and has high specific gravity and conductivity is also widely used in many industrial fields. For example, in JP-A-56-159248, polytetramethylene terephthalate is added to copper, iron, nickel,
A resin composition containing a metal powder such as aluminum or gold and having a high specific gravity and excellent in moldability and thermal conductivity is shown. Further, Japanese Patent Publication No. 61-11261 discloses a method for producing a high specific gravity thermoplastic resin composition in which a thermoplastic resin is mixed with zinc powder having an average particle size of 8 μm to 40 μm.
しかしながら、無機粉末を配合した熱可塑性樹脂組成物
は、無機粉末の配合量増加に伴ない、寸法精度が向上
し、高比重化するが、一方では、流動性が低下し、成形
品外観不良等の問題点を有する。例えば、無機粉末を容
量比で40％以上配合した樹脂組成物は、射出成形時に十
分な流動性がなく、ショートショット，成形品外観不良
等の欠点を有する。又、その前段階で溶融混練し、ペレ
ット化することも極めて困難である。However, the thermoplastic resin composition containing the inorganic powder has improved dimensional accuracy and higher specific gravity with an increase in the amount of the inorganic powder blended, but on the other hand, the fluidity is deteriorated and the appearance of the molded product is poor. Has the problem of. For example, a resin composition containing 40% or more by volume of inorganic powder does not have sufficient fluidity at the time of injection molding and has drawbacks such as short shot and poor appearance of a molded product. In addition, it is extremely difficult to melt-knead and pelletize before that.
（発明が解決しようとする課題） 本発明はこのような事情に鑑みなされたものであって、
その目的とするところは、高比重で高強度，高剛性を有
し、かつ成形性に優れた熱可塑性樹脂組成物を提供する
にある。(Problems to be Solved by the Invention) The present invention has been made in view of such circumstances,
An object of the invention is to provide a thermoplastic resin composition having high specific gravity, high strength, high rigidity, and excellent moldability.
（課題を解決するための手段） 上述の目的は、熱可塑性樹脂と無機粉末とからなる組成
物であって、該無機粉末の粒度分布が、粒径10μｍ未満
のものが無機粉末全体重量中40〜70重量％、10〜20μｍ
のものが同じく15重量％以下、20μｍを超えるものが同
じく25〜50重量％であることを特徴とする熱可塑性樹脂
組成物によって達成される。(Means for Solving the Problems) The above-mentioned object is a composition comprising a thermoplastic resin and an inorganic powder, and the inorganic powder having a particle size distribution of less than 10 μm is 40% of the total weight of the inorganic powder. ~ 70% by weight, 10 ~ 20μm
Is also not more than 15% by weight, and those exceeding 20 μm are also 25 to 50% by weight, which is achieved by the thermoplastic resin composition.
以下、本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
本発明に使用する熱可塑性樹脂としては、加熱流動性が
あり、射出成形可能なものであれば特に限定するもので
はなく、例えば、ポリアミド，ポリエステル，ポリカー
ボネート，ポリエーテルサルフォン，ポリオレフィン，
ポリフェニレンオキサイド，ポリフェニレンサルファイ
ド，ポリエーテルエーテルケトン,AS樹脂,AN樹脂,ABS樹
脂等が挙げられる。これらの中でも、ポリアミド，ポリ
エステル，ポリフェニレンサルファイドが好適である。The thermoplastic resin used in the present invention is not particularly limited as long as it has heat fluidity and can be injection molded, and examples thereof include polyamide, polyester, polycarbonate, polyether sulfone, polyolefin,
Examples include polyphenylene oxide, polyphenylene sulfide, polyether ether ketone, AS resin, AN resin, ABS resin and the like. Among these, polyamide, polyester, and polyphenylene sulfide are preferable.
また、本発明に使用する無機粉末としては、鉄，ニッケ
ル，コバルト，銅，亜鉛，タングステン等の金属、これ
ら２種以上の金属からなる合金、及びケイ素，アルミニ
ウム，カルシウム，バリウム，亜鉛、ジルコニウム等の
酸化物，炭化物もしくは窒化物等のセラミック等が挙げ
られる。また、これらは１種でも、２種以上混合して用
いてもよい。The inorganic powder used in the present invention includes metals such as iron, nickel, cobalt, copper, zinc and tungsten, alloys of two or more of these metals, and silicon, aluminum, calcium, barium, zinc and zirconium. Examples thereof include ceramics such as oxides, carbides, and nitrides. These may be used alone or in combination of two or more.
本発明において、無機粉末の粒度分布は、粒径10μｍ未
満のものが無機粉末全体重量中40〜70重量％、10〜20μ
ｍのものが15重量％以下、20μｍを超えるものが25〜50
重量％であることが肝要であり、好ましくは粒径10μｍ
未満のものが45〜65重量％、10〜20μｍのものが10重量
％以下、20μｍを超えるものが30〜45重量％である。無
機粉末をより高充填した樹脂組成物を得ようとする場合
には、無機粉末の粒度分布を上記範囲にすることが肝要
で、このような粒度分布の無機粉末を用いることによ
り、流動性，成形品外観とも優れた熱可塑性樹脂組成物
を得ることができる。10μｍ未満のものが40重量％未満
であると成形品外観が不良となり、70重量％を超えると
流動性が低下し、混練及び射出成形性が困難になる。10
〜20μｍの範囲のものが15重量％を超えると流動性が著
しく低下する。又、20μｍを超えるものが25重量％未満
である場合にも流動性が低下し、50重量％を超えると成
形品外観不良となる。In the present invention, the particle size distribution of the inorganic powder is such that a particle size of less than 10 μm is 40 to 70% by weight, and 10 to 20 μm based on the total weight of the inorganic powder.
m is less than 15% by weight, and more than 20 μm is 25 to 50
It is important that the content is 10% by weight, preferably a particle size of 10 μm
The amount of less than 45 to 65% by weight, the amount of less than 10 to 20 μm is less than 10% by weight, and the amount of more than 20 μm is 30 to 45% by weight. In order to obtain a resin composition in which the inorganic powder is highly filled, it is important that the particle size distribution of the inorganic powder is within the above range. By using the inorganic powder having such a particle size distribution, fluidity, It is possible to obtain a thermoplastic resin composition excellent in appearance of a molded product. If less than 10 μm is less than 40% by weight, the appearance of the molded product will be poor, and if more than 70% by weight, the fluidity will be deteriorated and kneading and injection moldability will be difficult. Ten
When it is in the range of up to 20 μm and exceeds 15% by weight, the fluidity is remarkably reduced. Also, if the content of the particles exceeding 20 μm is less than 25% by weight, the fluidity is deteriorated, and if it exceeds 50% by weight, the appearance of the molded product becomes poor.
また、無機粉末の熱可塑性樹脂への配合量は、好ましく
は65〜98重量％で、より好ましくは70〜98重量％であ
る。配合量が65重量％未満の場合、流動性，成形品外観
は良好であるが、比重，剛性等が不十分となる傾向があ
る。逆に、98重量％を超える場合、加熱溶融時の流動性
が悪く、射出成形が困難となり易い。The blending amount of the inorganic powder with the thermoplastic resin is preferably 65 to 98% by weight, more preferably 70 to 98% by weight. When the blending amount is less than 65% by weight, the fluidity and the appearance of the molded product are good, but the specific gravity, rigidity, etc. tend to be insufficient. On the other hand, when it exceeds 98% by weight, the fluidity during heating and melting is poor, and injection molding tends to be difficult.
熱可塑性樹脂への無機粉末の配合方法は、特に限定され
るものではなく、例えば、熱可塑性樹脂粉末と無機粉末
とをヘンシェルミキサー等の高速回転翼を有する混練機
で攪拌による摩擦溶融で造粒する方法や、単軸、或いは
２軸混練機で溶融混練する方法、又これらを組み合わせ
る方法等が挙げられる。The method for blending the inorganic powder with the thermoplastic resin is not particularly limited, and for example, the thermoplastic resin powder and the inorganic powder are granulated by friction melting by stirring with a kneader having a high-speed rotating blade such as a Henschel mixer. Method, a method of melt-kneading with a single-screw or twin-screw kneader, and a method of combining these.
（発明の効果） 本発明にかかる熱可塑性樹脂組成物は、射出成形材料と
して良好な成形性，成形品外観を有するものである。ま
た、無機粉末を理論的最高充填量近くまで高充填するこ
とを可能とし、無機粉末を高充填しても流動性に優れ、
成形性が良好である。無機粉末の種類に応じ、高い寸法
精度の必要なもの，大きい比重の必要なもの，プラマ
グ，セラミック射出成形，金属射出焼結等の用途に有用
な樹脂組成物として提供される。(Effects of the Invention) The thermoplastic resin composition according to the present invention has good moldability as an injection molding material and a molded article appearance. In addition, it is possible to highly fill the inorganic powder to near the theoretical maximum filling amount, and even if the inorganic powder is highly filled, the fluidity is excellent,
Good moldability. According to the type of inorganic powder, it is provided as a resin composition useful for applications such as those requiring high dimensional accuracy, those requiring large specific gravity, plastic magnets, ceramic injection molding, and metal injection sintering.
以下、実施例を挙げて本発明を具体的に説明する。Hereinafter, the present invention will be specifically described with reference to examples.
（実施例１〜4,比較例１〜10） 粉末状ナイロン６樹脂（鐘紡（株）製,MC−102）とタン
グステン粉末とを表−１に示す割合で配合した。また、
この時使用したタングステン粉末の粒度分布は表−１に
示すようにした。次いで、これをヘンシェルミキサーを
用いて高速攪拌下で摩擦溶融した後、冷却固化して再粉
砕し、更に、30mmφ２軸混練機を用いて、シリンダー温
度250〜260℃で溶融混練し、成形用ペレットを得た。次
いで、得られたペレットを用いて通常実施されているナ
イロン６樹脂の成形条件で射出成形し、成形サンプルを
得た。(Examples 1 to 4, Comparative Examples 1 to 10) Powdered nylon 6 resin (manufactured by Kanebo Ltd., MC-102) and tungsten powder were blended in the proportions shown in Table 1. Also,
The particle size distribution of the tungsten powder used at this time is shown in Table 1. Then, this was friction melted under high speed stirring using a Henschel mixer, cooled and solidified and re-ground, and further melt-kneaded at a cylinder temperature of 250 to 260 ° C. using a 30 mmφ twin-screw kneader to form molding pellets. Got Then, the obtained pellets were injection-molded under a commonly-used nylon 6 resin molding condition to obtain a molded sample.
また、前記同様の方法を用い、タングステン粉末をアル
ミナ粉末にかえ、配合比，粒度分布を表−２に示すよう
にして成形サンプルを得た。Further, using the same method as described above, a tungsten powder was replaced with an alumina powder, and the compounding ratio and particle size distribution were as shown in Table 2 to obtain a molded sample.
得られた成形サンプルの評価を行った。評価の結果を表
−３に併せて示す。The obtained molded sample was evaluated. The evaluation results are also shown in Table-3.
比較例３及び比較例８は、30mmφ２軸混練機で混練でき
ず、成形用ペレットを採取できなかった。 In Comparative Example 3 and Comparative Example 8, the 30 mmφ twin-screw kneader could not be kneaded, and the molding pellets could not be collected.
表−３の如く、無機粉末の粒度分布が本発明の範囲内で
ある場合は、混練操業性，射出成形性及び成形品外観全
てに優れていた。逆に、無機粉末の粒度分布が本発明の
範囲から外れた場合、混練操業性，射出成形性及び成形
品外観全てを満足することはできなかった。As shown in Table 3, when the particle size distribution of the inorganic powder was within the range of the present invention, kneading workability, injection moldability, and appearance of the molded product were all excellent. On the contrary, when the particle size distribution of the inorganic powder is out of the range of the present invention, it is not possible to satisfy all of the kneading workability, injection moldability and appearance of the molded product.
Claims (1)
であって、該無機粉末の粒度分布が、粒径10μｍ未満の
ものが無機粉末全体重量中40〜70重量％、10〜20μｍの
ものが同じく15重量％以下、20μｍを超えるものが同じ
く25〜50重量％であることを特徴とする熱可塑性樹脂組
成物。1. A composition comprising a thermoplastic resin and an inorganic powder, wherein the inorganic powder having a particle size distribution of less than 10 μm has a particle size distribution of 40 to 70% by weight and 10 to 20 μm based on the total weight of the inorganic powder. A thermoplastic resin composition, characterized in that the same is 15% by weight or less, and the one exceeding 20 μm is also 25 to 50% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024799A JPH0717784B2 (en) | 1990-02-02 | 1990-02-02 | Thermoplastic resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024799A JPH0717784B2 (en) | 1990-02-02 | 1990-02-02 | Thermoplastic resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03229763A JPH03229763A (en) | 1991-10-11 |
| JPH0717784B2 true JPH0717784B2 (en) | 1995-03-01 |
Family
ID=12148246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2024799A Expired - Lifetime JPH0717784B2 (en) | 1990-02-02 | 1990-02-02 | Thermoplastic resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0717784B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11208359B2 (en) * | 2017-02-27 | 2021-12-28 | Kyocera Corporation | Corrosion-resistant member |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10135591A (en) * | 1996-10-29 | 1998-05-22 | Matsushita Electric Ind Co Ltd | Heat conductive substrate and wiring substrate |
| WO1999016831A1 (en) * | 1997-09-30 | 1999-04-08 | Ngk Insulators, Ltd. | Plastic/ceramic composite material and process for producing the same |
| JP3652900B2 (en) | 1997-12-16 | 2005-05-25 | 日本碍子株式会社 | Fiber composite materials and uses thereof |
| JP6027935B2 (en) * | 2013-03-29 | 2016-11-16 | 出光ライオンコンポジット株式会社 | Polyarylene sulfide resin composition and use thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5822055B2 (en) * | 1979-06-15 | 1983-05-06 | 昭和電工株式会社 | Compounding agents for polymeric substances |
-
1990
- 1990-02-02 JP JP2024799A patent/JPH0717784B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11208359B2 (en) * | 2017-02-27 | 2021-12-28 | Kyocera Corporation | Corrosion-resistant member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03229763A (en) | 1991-10-11 |
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