JP2607443B2 - Thermoplastic resin composition - Google Patents
Thermoplastic resin compositionInfo
- Publication number
- JP2607443B2 JP2607443B2 JP2010155A JP1015590A JP2607443B2 JP 2607443 B2 JP2607443 B2 JP 2607443B2 JP 2010155 A JP2010155 A JP 2010155A JP 1015590 A JP1015590 A JP 1015590A JP 2607443 B2 JP2607443 B2 JP 2607443B2
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- weight
- resin composition
- carboxylic acid
- specific gravity
- 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タングステン粉末を高充填し
た射出成形材料に係り、高比重性を必要とする電気部品
や機械部品等に好適な熱可塑性樹脂組成物に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an injection molding material in which a thermoplastic resin is highly filled with tungsten powder, and is suitable for an electric component or a mechanical component requiring high specific gravity. The present invention relates to a plastic resin composition.
（従来の技術） 従来、熱可塑性樹脂に金属粉末を充填して高比重性を
付与した熱可塑性樹脂組成物が、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、熱伝導性に優れた熱可塑性樹脂組成物
が示されている。また、特公昭61−11261号公報には、
熱可塑性樹脂に平均粒径８μ〜40μ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, thermoplastic resin compositions in which a thermoplastic resin is filled with metal powder to impart high specific gravity have been widely used in many industrial fields. For example, Japanese Patent Application Laid-Open No. Sho 56-159248 discloses a thermoplastic resin having a high specific gravity, excellent in moldability and thermal conductivity, in which a metal powder such as copper, iron, nickel, aluminum and gold is blended with polytetramethylene terephthalate. The composition is shown. Also, Japanese Patent Publication No. 61-11261,
A method for producing a high specific gravity thermoplastic resin composition in which zinc powder having an average particle size of 8 μm to 40 μm is blended with a thermoplastic resin is described.
しかしながら、金属粉末が配合された熱可塑性樹脂組
成物は、金属粉末の配合量増加に伴ない高比重化する
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、比重９以上の極めて高比重の熱可
塑性樹脂組成物を得ようとする場合には、金，白金，タ
ングステン粉末等を使用し、且つ、高充填しなければな
らず、混練、及び射出成形が極めて困難となる。However, the thermoplastic resin composition in which the metal powder is blended has a higher specific gravity with an increase in the blending amount of the metal powder, but on the other hand, has a problem that the fluidity is reduced and the appearance of a molded article is poor. For example, in the case of obtaining a thermoplastic resin composition having a specific gravity of 9 or more, a gold, platinum, tungsten powder or the like must be used and must be highly filled, and kneading and injection molding must be performed. Becomes extremely difficult.
更に、金属粉末を高充填した熱可塑性樹脂組成物を射
出成形する場合には、金属粉末間の摩擦による局部発熱
が大きく、熱可塑性樹脂の熱分解によるガスの発生、及
び成形品外観不良という問題点がある。Furthermore, when a thermoplastic resin composition highly filled with metal powder is injection-molded, local heat generation due to friction between the metal powders is large, gas is generated due to thermal decomposition of the thermoplastic resin, and the appearance of a molded product is poor. There is a point.
（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、かつ、溶融時
の流動性に優れた成形性良好な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, and an object of the present invention is to provide a high specific gravity and excellent moldability with excellent fluidity during melting. An object of the present invention is to provide a thermoplastic resin composition.
（課題を解決するための手段） 上記の目的は、熱可塑性樹脂、タングステン粉末、及
び下記一般式（Ｉ）で示される飽和脂肪族カルボン酸化
合物よりなる組成物であって、上記タングステン粉末を
90〜98重量％、飽和脂肪族カルボン酸化合物を0.01〜0.
5重量％含有し、且つ比重が7.5以上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 object is to provide a composition comprising a thermoplastic resin, a tungsten powder, and a saturated aliphatic carboxylic acid compound represented by the following general formula (I).
90 to 98% by weight of the saturated aliphatic carboxylic acid compound is 0.01 to 0.1%.
This is achieved by a thermoplastic resin composition containing 5% by weight and having a specific gravity of 7.5 or more.
〔CH3（CH2）mCOO〕nR ……（Ｉ） （式中、ｍは20〜32の整数、ｎは１または２、Ｒはアル
カリ金属、アルカリ土類金属、あるいは脂肪族炭化水素
基を表わす。） すなわち、本発明者らは、金属粉末としてタングステ
ン粉末を用い、これを熱可塑性樹脂に高充填し、更に、
上記一般式（Ｉ）で示される飽和脂肪族カルボン酸化合
物を配合することにより、熱可塑性樹脂に金属粉末を高
充填しても溶融時の流動性が良好で成形性に優れた高比
重の熱可塑性樹脂組成物が得られることを見いだし本発
明を完成した。[CH 3 (CH 2 ) m COO] n R (I) (wherein, m is an integer of 20 to 32, n is 1 or 2, R is an alkali metal, an alkaline earth metal, or an aliphatic hydrocarbon) In other words, the present inventors used tungsten powder as a metal powder, highly filled this into a thermoplastic resin,
By blending the saturated aliphatic carboxylic acid compound represented by the above general formula (I), even if the thermoplastic resin is highly filled with metal powder, the fluidity at the time of melting is excellent and the high specific gravity heat is excellent in moldability. The present inventors have found that a plastic resin composition can be obtained and completed the present invention.
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、一般に射出
成形加工に供せられているものであれば特に制限はな
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オン，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
を挙げることができる。これらの中で特に好ましいもの
として、ポリアミド，ポリエステル，ポリフェニレンサ
ルファイドが挙げられる。The thermoplastic resin used in the present invention is not particularly limited as long as it is generally subjected to an injection molding process. Examples thereof include polyamide, polyester, polycarbonate, polyether sulfone, polyolefin, polyphenylene oxide, and polyphenylene sulfide. ,
Examples thereof include polyetheretherketone, AS resin, AN resin, and ABS resin. Of these, particularly preferred are polyamide, polyester and polyphenylene sulfide.
次に、本発明に使用するタングステン粉末としては、
その平均粒径が50μｍ以下であることが望ましい。更
に、粒径10μｍ以下のものがタングステン粉末全体の割
合で50重量％以上、且つ、粒径20μｍ以上のものが30重
量％以上の粒径分布となっているタングステン粉末が好
適である。このような粒径分布の場合に、特に溶融時の
流動性が良好となる。Next, as the tungsten powder used in the present invention,
It is desirable that the average particle size is 50 μm or less. Further, a tungsten powder having a particle size distribution of 50% by weight or more based on the whole tungsten powder having a particle size of 10 μm or less and a particle size distribution of 30% by weight or more with a particle size of 20 μm or more is preferable. In the case of such a particle size distribution, the fluidity particularly at the time of melting is improved.
また、タングステン粉末の配合量は、90〜98重量％で
あることが肝要であり、特に93〜98重量％が好ましい。
配合量が90重量％未満の場合には、十分な高比重性を得
られず、また、98重量％を超える場合には、加熱溶融時
の流動性が悪く、射出成形が困難となる。It is important that the content of the tungsten powder is 90 to 98% by weight, and particularly preferably 93 to 98% by weight.
If the amount is less than 90% by weight, a sufficiently high specific gravity cannot be obtained. If the amount exceeds 98% by weight, fluidity during heating and melting is poor, and injection molding becomes difficult.
本発明では、上記一般式（Ｉ）で示される飽和脂肪族
カルボン酸化合物を配合することが肝要である。飽和脂
肪族カルボン酸化合物は、式中のｍが20〜32の飽和脂肪
族カルボン酸の金属塩またはエステルである。金属塩と
しては、リチウム，ナトリウム，カリウム等のアルカリ
金属、マグネシウム，カルシウム等のアルカリ土類金属
から成るものが挙げられる。エステルとしては、エチレ
ングリコール、1,2−又は1,3−プロパンジオール、1,3
−又は1,4−ブタンジオール等のアルコールでエステル
化したもの等が挙げられる。また、飽和脂肪族カルボン
酸化合物は１種でも、２種以上組み合わされた混合物で
もよく、混合物としては、モンタンワックスが挙げられ
る。In the present invention, it is important to incorporate the saturated aliphatic carboxylic acid compound represented by the general formula (I). The saturated aliphatic carboxylic acid compound is a metal salt or ester of a saturated aliphatic carboxylic acid wherein m in the formula is 20 to 32. Examples of the metal salt include those composed of alkali metals such as lithium, sodium and potassium, and alkaline earth metals such as magnesium and calcium. Esters include ethylene glycol, 1,2- or 1,3-propanediol, 1,3
-Or those esterified with an alcohol such as 1,4-butanediol. The saturated aliphatic carboxylic acid compound may be one kind or a mixture of two or more kinds, and examples of the mixture include montan wax.
飽和脂肪族カルボン酸化合物の配合量は0.01〜0.5重
量％であり、好ましくは0.03〜0.3重量％である。配合
量が0.01重量％未満の場合には、流動性が不十分とな
り、射出成形時にタングステン粉末間の摩擦による局部
発熱でガスが発生し、成形品外観が不良となるばかりで
なく、物性低下も著しい。また、0.5重量％を超える場
合には、物性、特に衝撃強度の低下が著しい。The compounding amount of the saturated aliphatic carboxylic acid compound is 0.01 to 0.5% by weight, preferably 0.03 to 0.3% by weight. If the compounding amount is less than 0.01% by weight, the fluidity becomes insufficient, gas is generated due to local heat generation due to friction between the tungsten powders during injection molding, and not only the appearance of the molded product becomes poor, but also the physical properties decrease. Remarkable. On the other hand, if it exceeds 0.5% by weight, physical properties, particularly impact strength, are remarkably reduced.
熱可塑性樹脂へのタングステン粉末、及び飽和脂肪族
カルボン酸化合物の配合方法は、いくつか挙げられる
が、例えば、熱可塑性樹脂粉末、タングステン粉末、及
び飽和脂肪族カルボン酸化合物粉末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、また、この両者を組み合わせる方法等が挙げ
られる。There are several methods for blending the tungsten powder and the saturated aliphatic carboxylic acid compound into the thermoplastic resin.For example, the thermoplastic resin powder, the tungsten powder, and the saturated aliphatic carboxylic acid compound powder are mixed at a high speed with a Henschel mixer or the like. Examples thereof include a method of granulating by friction melting by stirring with a kneader having a rotating blade, a method of melt-kneading with a single-axis or twin-axis kneader, and a method of combining both.
（発明の効果） 以上のように、本発明にかゝる熱可塑性樹脂組成物
は、熱可塑性樹脂にタングステン粉末、更に上記一般式
（Ｉ）で示される飽和脂肪族カルボン酸化合物を配合し
てなることにより、極めて高比重で、且つ、優れた成形
性を有する。また、物性にも優れている。したがって、
高比重と寸法精度を必要とする電気部品や機械部品用の
成形材料として好適である。(Effects of the Invention) As described above, the thermoplastic resin composition according to the present invention is obtained by blending a thermoplastic resin with tungsten powder and further a saturated aliphatic carboxylic acid compound represented by the above general formula (I). As a result, it has an extremely high specific gravity and excellent moldability. Also, it has excellent physical properties. Therefore,
It is suitable as a molding material for electrical parts and mechanical parts requiring high specific gravity and dimensional accuracy.
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 described specifically with reference to examples.
尚、実施例に示す物性の測定は以下の方法で行なっ
た。In addition, the measurement of the physical property shown in the Example was performed by the following method.
（１）曲げ強度:ASTM Ｄ−790 （２）曲げ弾性率:ASTM Ｄ−790 （３）衝撃強度:ASTM Ｄ−256（アイゾゾット，ノッチ
付,1/4インチ） （４）比重:ASTM Ｄ−792 （実施例１〜３、比較例１〜４） 粉末状ナイロン６樹脂（鐘紡（株）製,MC−10
２）、飽和脂肪族カルボン酸部分けん化エステル（ヘキ
スト社製，ヘキストワックスOP）、及び、平均粒径12μ
ｍで、粒径分布が粒径10μｍ以下が55重量％、10〜20μ
ｍが10重量％、そして20μｍ以上が35重量％であるタン
グステン粉末を表−１に示す割合で配合した。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。(1) Flexural strength: ASTM D-790 (2) Flexural modulus: ASTM D-790 (3) Impact strength: ASTM D-256 (Izod, notched, 1/4 inch) (4) Specific gravity: ASTM D- 792 (Examples 1-3, Comparative Examples 1-4) Powdered nylon 6 resin (manufactured by Kanebo Co., Ltd., MC-10)
2) Saponified saturated aliphatic carboxylic acid ester (Hoechst Inc., Hoechst Wax OP), and an average particle size of 12 μm
m, the particle size distribution is 55% by weight when the particle size is 10 μm or less, 10 to 20 μm
A tungsten powder having m of 10% by weight and 20 μm or more of 35% by weight was blended in the proportions shown in Table 1. Then
This was friction-melted under high-speed stirring using a Henschel mixer, cooled, solidified, and re-crushed, and further melt-kneaded at a cylinder temperature of 250 to 260 ° C using a 30 mm φ biaxial kneader to form a pellet for molding. Obtained.
尚、比較例２の資料は、溶融流動性が悪くペレット化
することが出来なかった。Note that the material of Comparative Example 2 had poor melt fluidity and could not be pelletized.
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て試験片を
得た。Next, using the obtained pellets, injection molding was performed under the usual molding conditions of nylon 6 resin to obtain a test piece.
得られた試験片の物性評価結果を表−２に示す。 Table 2 shows the physical property evaluation results of the obtained test pieces.
以上の結果より、実施例のナイロン樹脂組成物は、極
めて高比重で物性、及び成形品外観に優れていた。一
方、比較例のナイロン樹脂組成物は、流動性が悪かった
り、比重が低すぎたり、物性に問題があったりした。 From the above results, the nylon resin compositions of Examples were extremely high in specific gravity and excellent in physical properties and appearance of molded products. On the other hand, the nylon resin composition of the comparative example had poor fluidity, too low specific gravity, and had problems in physical properties.
Claims (1)
記一般式（Ｉ）で示される飽和脂肪族カルボン酸化合物
よりなる組成物であって、上記タングステン粉末を90〜
98重量％、飽和脂肪族カルボン酸化合物を0.01〜0.5重
量％含有し、且つ比重が7.5以上であることを特徴とす
る熱可塑性樹脂組成物。 〔CH3（CH2）mCOO〕nR ……（Ｉ） （式中、ｍは20〜32の整数、ｎは１または２、Ｒはアル
カリ金属、アルカリ土類金属、あるいは脂肪族炭化水素
基を表わす。）1. A composition comprising a thermoplastic resin, tungsten powder, and a saturated aliphatic carboxylic acid compound represented by the following general formula (I), wherein said tungsten powder is 90 to 90%.
A thermoplastic resin composition comprising 98% by weight, 0.01 to 0.5% by weight of a saturated aliphatic carboxylic acid compound, and having a specific gravity of 7.5 or more. [CH 3 (CH 2 ) m COO] n R (I) (wherein, m is an integer of 20 to 32, n is 1 or 2, R is an alkali metal, an alkaline earth metal, or an aliphatic hydrocarbon) Represents a group.)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010155A JP2607443B2 (en) | 1990-01-18 | 1990-01-18 | Thermoplastic resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010155A JP2607443B2 (en) | 1990-01-18 | 1990-01-18 | Thermoplastic resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03215563A JPH03215563A (en) | 1991-09-20 |
| JP2607443B2 true JP2607443B2 (en) | 1997-05-07 |
Family
ID=11742387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2010155A Expired - Lifetime JP2607443B2 (en) | 1990-01-18 | 1990-01-18 | Thermoplastic resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2607443B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6300399B1 (en) | 1999-08-27 | 2001-10-09 | General Electric Company | High specific gravity polyester blend |
| EP3536477A4 (en) * | 2016-11-04 | 2020-04-29 | Sanpura Co., Ltd. | Method for producing metal-imitating resin molded member, metal-imitating resin molded member and use of metal-imitating resin molded member |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6191254A (en) * | 1984-10-12 | 1986-05-09 | Seiko Epson Corp | Wrist watch case |
| JPS61254661A (en) * | 1985-05-07 | 1986-11-12 | Seiko Epson Corp | Surface part composition for clock |
-
1990
- 1990-01-18 JP JP2010155A patent/JP2607443B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6191254A (en) * | 1984-10-12 | 1986-05-09 | Seiko Epson Corp | Wrist watch case |
| JPS61254661A (en) * | 1985-05-07 | 1986-11-12 | Seiko Epson Corp | Surface part composition for clock |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03215563A (en) | 1991-09-20 |
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