JPH02127439A - Production molded article of thermoplastic resin - Google Patents
Production molded article of thermoplastic resinInfo
- Publication number
- JPH02127439A JPH02127439A JP28089588A JP28089588A JPH02127439A JP H02127439 A JPH02127439 A JP H02127439A JP 28089588 A JP28089588 A JP 28089588A JP 28089588 A JP28089588 A JP 28089588A JP H02127439 A JPH02127439 A JP H02127439A
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- molded article
- resin
- iron powder
- volume
- 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
- 229920005992 thermoplastic resin Polymers 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229920006122 polyamide resin Polymers 0.000 abstract description 4
- 229920001225 polyester resin Polymers 0.000 abstract description 3
- 239000004645 polyester resin Substances 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 8
- 238000010292 electrical insulation Methods 0.000 description 7
- 230000005484 gravity Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- -1 combustion aids Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 101100294761 Molluscum contagiosum virus subtype 1 NPH1 gene Proteins 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000003484 crystal nucleating agent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Abstract
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成形物の製造方法に関するもので
あり、更に詳しくは、回転機器や電気部品に好適な電気
絶縁性を向上させた高化ｍ熱可塑性樹脂成形物の製造方
法に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for manufacturing a thermoplastic resin molded product, and more specifically, to a method for manufacturing a thermoplastic resin molded product, and more specifically, a high-quality thermoplastic resin molded product with improved electrical insulation properties suitable for rotating equipment and electrical parts. The present invention relates to a method for manufacturing a thermoplastic resin molded article.
（従来の技術）
熱可塑性樹脂に鉄粉をはじめとする金属粉を配合して高
比重性を付与することは、従来より広く行われている。(Prior Art) It has been widely practiced to impart high specific gravity by blending metal powder such as iron powder into thermoplastic resin.
特に鉄粉は安価であり簡単に入手出来るため、鉄粉を配
合した高比重熱可塑性樹脂成形物は、切削加工や焼結工
程を必要とする金属素材に代わって、益々需要が増大し
ている。また、従来成形加工の安易性より使われていた
熱可塑性樹脂に代わり、重量性を付与する目的で高比重
熱可塑性樹脂成形物が使われている。In particular, since iron powder is cheap and easily available, demand for high-density thermoplastic resin molded products containing iron powder is increasing as an alternative to metal materials that require cutting and sintering processes. . In addition, instead of thermoplastic resins, which have traditionally been used for ease of molding, high-density thermoplastic resin moldings are now being used for the purpose of imparting weight.
（発明が解決しようとする問題点）
しかしながら、熱可塑性樹脂に多量の鉄粉を配合した場
合、その成形物は樹脂本来の特徴の一つである電気絶縁
性が失われることになり、回転機器や電気部品に使用し
た場合、樹脂に不要な電流が流れ機器の損傷や人体に悪
影響を及ぼす場合がある。鉄粉の配合量を減らした場合
には、その成形物は、電気絶縁性を保持出来るが、高比
重性が不充分である。また、電気絶縁性を失した樹脂成
形物に電気絶縁性を付与する方法としては、金属素材の
場合に用いられている絶縁塗料の塗装があるが、塗装む
らや剥離が生ずる問題点がある。(Problem to be solved by the invention) However, if a large amount of iron powder is blended into a thermoplastic resin, the molded product will lose its electrical insulation, which is one of the original characteristics of the resin, and When used in plastics or electrical parts, unnecessary current may flow through the resin, causing damage to equipment and adverse effects on the human body. When the amount of iron powder is reduced, the molded product can maintain electrical insulation, but its high specific gravity is insufficient. Furthermore, as a method of imparting electrical insulation to a resin molded product that has lost its electrical insulation properties, there is the coating of an insulating paint that is used in the case of metal materials, but this method has the problem of uneven coating and peeling.
（問題点を解決するための手段）
本発明者らは、かかる従来技術の有する問題点を解決す
べく鋭意研究した結果、本発明を完成した。(Means for Solving the Problems) The present inventors completed the present invention as a result of intensive research to solve the problems of the prior art.
即ち本発明は、鉄粉を１５〜７０体積％含存し、１０６
Ω・Ｃｎｌ以下の体積固有抵抗を有する熱可塑性樹脂成
形物を少なくとも８０℃で熱処理して１０１０Ω・ｃｍ
以上とすることを特徴とする熱可塑性樹脂成形物の製造
方法である。That is, the present invention contains 15 to 70% by volume of iron powder, and contains 106% by volume of iron powder.
A thermoplastic resin molded product having a volume resistivity of Ω・Cnl or less is heat-treated at at least 80°C to 1010Ω・cm
This is a method for producing a thermoplastic resin molded article characterized by the above.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明に使用する熱可塑性樹脂としてはポリニスプル樹
脂、ポリアミド樹脂、ポリカーボネート樹脂、ポリオレ
フィン樹脂、ポリアセタール樹脂。Thermoplastic resins used in the present invention include polynisple resin, polyamide resin, polycarbonate resin, polyolefin resin, and polyacetal resin.
ポリフェニレンオキサイド樹脂、ポリフェニレンサルフ
ァイド樹脂、ポリスチレン樹脂、ＡＢＳ樹脂、ＡＳ樹脂
、アクリル樹脂などが挙げられる。Examples include polyphenylene oxide resin, polyphenylene sulfide resin, polystyrene resin, ABS resin, AS resin, and acrylic resin.
特にポリエステル樹脂３ ポリアミド樹脂を主成分とす
る熱可塑性樹脂が好ましい。In particular, the polyester resin 3 is preferably a thermoplastic resin whose main component is polyamide resin.
未発明に使用する鉄粉としては例えば還元鉄。An example of iron powder used for non-inventions is reduced iron.
噴霧鉄、銑鉄、鋳鉄、電解鉄などの粒径が１〜５００μ
の鉄粉をあげることができる。鉄粉の配合量は１５〜７
０体積％とすることが肝要であり、１８〜６０体積％と
することが好ましい。配合量が１５体積％未溝の場合は
、高比重性に乏しく、本発明の目的を達成することはで
きない。一方、７０体積％を超える場合は、溶融時の流
動性が極めて悪くなり、成形することが困難となる。Particle size of spray iron, pig iron, cast iron, electrolytic iron, etc. is 1 to 500μ
can give you iron powder. The amount of iron powder mixed is 15-7
It is important that the content be 0% by volume, and preferably 18 to 60% by volume. If the blending amount is 15% by volume without grooves, high specific gravity is poor and the object of the present invention cannot be achieved. On the other hand, if it exceeds 70% by volume, the fluidity during melting becomes extremely poor, making it difficult to mold.
前記熱可塑性樹脂と鉄粉とを混合するには、ベレット状
又はパウダー状などの熱可塑性樹脂と鉄お）との所定量
を２軸混練押出機で充分に混練し、ペレット化するのが
好ましい。成形物を得るには、通常の射出成形機を用い
れば良い。In order to mix the thermoplastic resin and iron powder, it is preferable to thoroughly knead a predetermined amount of the thermoplastic resin in pellet or powder form and the iron powder using a twin-screw kneading extruder and pelletize it. . A conventional injection molding machine may be used to obtain the molded product.
本発明に於いて実施する熱処理は、８０℃以上熱可塑性
樹脂の融点以下の温度で行うことが肝要であり、特にｌ
ＯＯ℃以上融点以下とすることが本発明の目的を達成す
る上で好適である。熱処理温度が８０℃未満の場合には
、熱処理による電気絶縁性付与効果は得られず、本発明
の目的を達成することは出来ない。熱処理の時間は、温
度、或いは成形物の寸法、形状等により異なるが、通常
１５分間以上、好ましくは３０分間以上である。It is important that the heat treatment carried out in the present invention be carried out at a temperature of 80°C or higher and lower than the melting point of the thermoplastic resin.
In order to achieve the object of the present invention, it is preferable to set the temperature to be at least 00° C. and at most the melting point. If the heat treatment temperature is less than 80° C., the effect of imparting electrical insulation through heat treatment cannot be obtained, and the object of the present invention cannot be achieved. The heat treatment time varies depending on the temperature, size, shape, etc. of the molded product, but is usually 15 minutes or more, preferably 30 minutes or more.
また熱処理は空気中、真空中、或いは窒素ガスやアルゴ
ンガス等の不活性ガス中等の雰囲気下で行うことができ
る。Further, the heat treatment can be performed in air, vacuum, or an atmosphere of an inert gas such as nitrogen gas or argon gas.
本発明の樹脂成形物には、更に必要に応して難燃剤１Ｍ
燃助剤、ガラス繊維、マイカ等の強化材。The resin molded product of the present invention may further contain a flame retardant of 1M as necessary.
Reinforcing materials such as combustion aids, glass fiber, and mica.
着色剤、熱安定剤、滑則、結晶核剤等も添加することが
できる。Coloring agents, heat stabilizers, lubricants, crystal nucleating agents, etc. can also be added.
以下、発明の好適な実施態様を整理して記しておく。Hereinafter, preferred embodiments of the invention will be summarized and described.
（２）熱可塑性樹脂が、ポリエステル樹脂又はポリアミ
ド樹脂を主成分とする熱可塑性樹脂である特許請求の範
囲第１項記載の方法。(2) The method according to claim 1, wherein the thermoplastic resin is a thermoplastic resin whose main component is a polyester resin or a polyamide resin.
（３） 鉄粉が１８〜６０体積％である特許請求の範
囲の第１項記載の方法。(3) The method according to claim 1, wherein the iron powder is 18 to 60% by volume.
（４）熱処理を少なくとも１００℃で行う特許請求の範
囲第１項記載の方法。(4) The method according to claim 1, wherein the heat treatment is carried out at at least 100°C.
（発明の効果）
本発明にかかる熱可塑性樹脂成形物は、従来の鉄む）を
配合した樹脂成形物と比較して、優れた電気絶縁性を有
しており、回転機器や電気部品として好適である。(Effects of the Invention) The thermoplastic resin molded product according to the present invention has superior electrical insulation properties compared to conventional resin molded products containing iron, and is suitable for use in rotating equipment and electrical parts. It is.
（実施例） 以下、実施例を用いて更に詳細な説明を行う。(Example) A more detailed explanation will be given below using examples.
尚、物性の評価は下記の方法に従った。The physical properties were evaluated according to the following method.
】、 比重：ＡＳＴＭ Ｄ ７９２２、 体積固有
抵抗：ＡＳＴＭ Ｄ−２５７実施例１−３．比較例１
．２
６ナイロン樹脂（１！紡■製 ＭＣ１００Ｌ＞及び鉄粉
（用ｋｔ４製鉄■製、Ｋ［Ｐ−２７０Ｍ−２００ｍｅｓ
ｈ）を表−１で示される組成で配合した後、３５ｍｍ径
の２軸混練押出機を用いてペレット化した。得られたベ
レットを射出成形機を使用して成形物を得た。得られた
成形物の熱処理前の比重、体積固有抵抗及び熱処理後（
１２０’Ｃｘ１時間、空気中）の体積固有抵抗を測定し
た。], Specific gravity: ASTM D 7922, Volume resistivity: ASTM D-257 Example 1-3. Comparative example 1
．． 2 6 Nylon resin (1! MC100L made by Boseki) and iron powder (made by KT4 Steel Co., Ltd., K [P-270M-200mes
h) was blended with the composition shown in Table 1, and then pelletized using a twin-screw kneading extruder with a diameter of 35 mm. A molded article was obtained from the obtained pellet using an injection molding machine. Specific gravity before heat treatment, volume resistivity, and after heat treatment (
The volume resistivity was measured at 120'C x 1 hour in air).
これらの結果を表−１に示す。表−１中、比較例２は溶
融流動性が悪く、射出成形できなかった。These results are shown in Table-1. In Table 1, Comparative Example 2 had poor melt fluidity and could not be injection molded.
実施例４−６．比較例３
ポリブチレンテレフタレート樹脂（！！紡■製ＰＢＴ７
２０）６０体積％、鉄粉（川崎製鉄■製。Example 4-6. Comparative Example 3 Polybutylene terephthalate resin (PBT7 manufactured by!!
20) 60% by volume, iron powder (manufactured by Kawasaki Steel ■).
Claims (1)
ｍ以下の体積固有抵抗を有する熱可塑性樹脂成形物を少
なくとも８０℃で熱処理して、１０＾１＾０Ω・ｃｍ以
上とすることを特徴とする熱可塑性樹脂成形物の製造方
法。(1) Contains 15-70% by volume of iron powder and has a resistance of 10^6Ω・c
1. A method for producing a thermoplastic resin molded article, which comprises heat-treating a thermoplastic resin molded article having a volume resistivity of 10^1^0 Ω·cm or more at at least 80°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28089588A JPH02127439A (en) | 1988-11-07 | 1988-11-07 | Production molded article of thermoplastic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28089588A JPH02127439A (en) | 1988-11-07 | 1988-11-07 | Production molded article of thermoplastic resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02127439A true JPH02127439A (en) | 1990-05-16 |
Family
ID=17631439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28089588A Pending JPH02127439A (en) | 1988-11-07 | 1988-11-07 | Production molded article of thermoplastic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02127439A (en) |
-
1988
- 1988-11-07 JP JP28089588A patent/JPH02127439A/en active Pending
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