JP4030150B2 - Production method of polymer blend - Google Patents

Production method of polymer blend Download PDF

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Publication number
JP4030150B2
JP4030150B2 JP09436497A JP9436497A JP4030150B2 JP 4030150 B2 JP4030150 B2 JP 4030150B2 JP 09436497 A JP09436497 A JP 09436497A JP 9436497 A JP9436497 A JP 9436497A JP 4030150 B2 JP4030150 B2 JP 4030150B2
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Japan
Prior art keywords
screw
kneading
resin
extruder
polymer blend
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JPH10272624A (en
Inventor
岩崎嘉則
野崎達矢
秋葉憲弘
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Tokyo Printing Ink Mfg Co Ltd
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Tokyo Printing Ink Mfg Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/57Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/565Screws having projections other than the thread, e.g. pins

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

【0001】
【産業上の利用分野】
本願発明は、ベ−スとなる担体熱可塑性樹脂に、更に一種もしくは二種以上の樹脂、着色剤や添加剤等を均一に混練配合してなる機械的物性の優れたポリマーブレンドの製造方法に関するものである。
【0002】
【従来の技術】
従来よりポリエチレン、ポリプロピレン、ポリアミド、ポリスチレン等汎用性熱可塑性樹脂は、フイルム、射出成形品、繊維等に広く大量に利用されており、それぞれの用途に応じて性能を付与したり、あるいは特性を改善するために滑剤、顔料、難燃剤、帯電防止剤、充填剤等添加剤を一般に押出機を用い混練配合されている。
そして近年は、これら汎用性熱可塑性樹脂の高機能化を目的に性質の異なる樹脂を混練して、従来の汎用性熱可塑性樹脂では得られない特性、例えば耐衝撃性や耐熱性等の飛躍的に向上した樹脂組成物(ポリマ−ブレンド、ポリマーアロイ)を製造したり、高価な樹脂の特徴を失わずに汎用性樹脂を増量する目的で配合することが試みられており、このよう新規用途の開発が盛んに検討されている。
【0003】
上記の樹脂組成物は、性質の異なる複数の樹脂を混練するために互いに相溶性に乏しく、このため得られる組成物は海島構造となっており、この際に如何に島部分を微細化するかが重要な課題となっている。
一般に性質の異なる樹脂同志は、相溶性に乏しく、混練により均一に分散した新規なポリマ−ブレンドを製造するためには、汎用性樹脂を使用した混練に比較して、押出機スクリュ−を高速回転したり、樹脂や添加剤等からなる組成物に強力な剪断応力を長時間加えて混練する必要がある。
そこで、押出機により樹脂や添加剤等を強力に混練する際には、スクリュ−の長さLに占める樹脂溶融混練部の長さLを大きくして強力な剪断応力を長く作用させており、これにより生じる剪断発熱に長時間曝された後に吐出している。
【0004】
この結果、樹脂の極限粘度が大幅に低下し、これが原因となって成形性が悪くなったり、製品の耐衝撃性や耐熱性など機械的物性が悪化する等の問題が生じ易くなる欠点がある。
これは、近年使用が盛んな二軸押出機でも同様で、樹脂や添加剤等を強力に混練するためにスクリュ−の長さLに占める樹脂溶融混練部の長さLを大きくした二軸押出機を使用して混練しており、強力な剪断応力を長く作用させているため、これにより生じる剪断発熱に長時間曝され吐出されており極限粘度が大幅に低下し、これが原因となって成形性が悪くなったり、製品の耐衝撃性や耐熱性など機械的物性が悪化する等の問題が生じ易くなる欠点がある。
【0005】
しかも、熱可塑性樹脂中に顔料や充填剤等添加剤を配合の際に上記のような押出機を使用した場合には、熱可塑性樹脂の溶融混練時に添加剤が二次凝集を生じ易く、このため良好な分散が得難い欠点がある。
尚、樹脂や添加剤等組成物の混練の際に、極限粘度の低下を抑制するために押出機のスクリュ−回転数を低くしたり、押出機内での滞留時間を短くするために供給量を増加させた場合には、十分な剪断応力が加えられず均一な分散が困難となるばかりでなく添加剤の凝集が生じて、満足な分散・混練効果が得られず好ましくない。
【0006】
【発明が解決しようとする課題】
本願発明者らは、上記の問題点を解消するために、二軸押出機内での熱可塑性樹脂の挙動を追跡調査したところ、熱可塑性樹脂や添加剤に対する剪断応力が、スクリュ−の一部分に作用が集中していることを知見したのである。
そこで、押出機内スクリュ−の樹脂溶融混練部の機構を熱可塑性樹脂や添加剤に対して均一広範囲に剪断応力が作用する様に改善したところ、少ない剪断応力で十分な混練が短時間で容易に行われ、極限粘度の低下も少なく均一分散された熱可塑性樹脂組成物が得られることを知り、本発明に完成するに至ったのである。
【0007】
【課題を解決するための手段】
すなわち本発明は、(A)担体樹脂に対して、(B)追加樹脂、(C)着色剤及び/又は(D)添加剤を、
回転数1200〜6000rpmであり、かつ周速2〜25m/secで自在方向に回転する二軸噛合わせ同軸で輸送部、ニ−ディング組方が順ニ−ディング、逆ニ−ディング、順ロ−タ−、逆ロ−タ−及び/又はネジである溶融混練部及び計量押出部からなる長さL/直径D=16〜83のスクリュ−を有し、該スクリュ−溶融混練部のL/D=10〜77である押出機を用い混練して得られるポリマーブレンドの製造方法である。
この際に、溶融混練部のニ−ディング組方は、順ニ−ディング、逆ニ−ディング、順ロ−タ−、逆ロ−タ−及び/又はネジである押出機を用いることで、優れた混練効果が発揮される。
【0008】
同様に、押出機のシリンダ−内壁面とスクリュ−とのチップクリアランスの割合が、0.1〜0.01Dであると優れた機械的特性を有する本発明のポリマーブレンドの製造が容易となる。
本発明では、請求範囲に記載の押出機を使用して、相溶性に乏しい(A)成分と(B)成分との樹脂を混練した際にできる海島構造の島部分が従来タイプの押出機を使用して得られる島部分に比較して、島部分の粒直径が微細となり得られる組成物の構造がより均一化されるために、対衝撃性、対伸び率等が著しく向上したポリマーブレンドが得られるのである。
本発明の(A)成分としては、従来タイプ押出機により混練が容易に行える汎用性熱可塑性樹脂である。例えばポリエチレン樹脂、ポリプロピレン樹脂、ポリスチレン樹脂、ポリエステル樹脂、ポリアミド樹脂、ポリカ−ボネ−ト樹脂、アクリロニトリル樹脂,PRT、PMMA等が挙げられる。
【0009】
これに対して(B)成分は、従来タイプの押出機を使用して(A)成分と混練した場合に微細で均一な配合が困難である樹脂、例えばポリイソプレン、ポリブテン、ポリイソブテン、ポリブタジエン、塩素化ポリエチレン、エチレン酢酸ビニル共重合体、SBR樹脂、ABS樹脂、変性ポリオレフィン、EPDM樹脂、SEBS,EPR、NBRが挙げられる。
例えば、(A)成分にポリエチレン樹脂又はポリプロピレン樹脂、(B)成分に変性ポリオレフインを配合して得られたポリマ−ブレンド品は、従来の同品に比較して遙かに優れた衝撃値と伸び率を示している。
本発明で使用する(C)着色剤としては、従来より熱可塑性樹脂に使用されている染顔料であれば何れでもよく、各種の有機顔料及び無機顔料が挙げられる。
本発明で使用する(D)添加剤としては、従来より熱可塑性樹脂に配合されているタルク、硫酸バリュウム、マイカ、シリカ、カオリン、クレ−、防曇剤、難燃剤が挙げられる。
【0010】
本発明で使用の押出機は、回転数1200〜6000rpmであり、かつ周速度2〜25m/secで自在方向に回転する二軸噛合わせのスクリュ−から成っており、該スクリュ−は樹脂供給口(ホッパ−)側から樹脂吐出口に向けて輸送部(イ)、溶融混練部(ロ)、計量押出部(ハ)の順に構成されている。
溶融混練部(ロ)のスクリュ−組方は、効果的に剪断応力及び圧縮力を与えるもので第1図の順ニ−ディング、第2図の逆ニ−ディング、第3図の順ロ−タ−、第4図の逆ロ−タ−、第5図のパイナップル、第6図の中立、第7図のワイド及び第8図のネジのいずれからなり、これら第1図〜第8図に記載のニ−ディングを単独にも、複数に組合わせて使用しても良い。
尚、本発明で使用するスクリュ−は、長さL/径Dの割合が16〜83であり、(イ):(ロ)=2:1〜1:4である、(ロ)の長さの割合が(イ):(ロ)=2:1より小さいと樹脂の溶融混練が充分に行われず好ましくない、又、(ロ)の割合が(イ):(ロ)=1:4より大きくしても本発明の効果は向上しない、従って、1:4あれば十分である。
【0011】
溶融混練部(ロ)における押出機のシリンダ−内壁面とスクリュ−との最小チップクリアランスが0.1D〜0.01Dでの状態は、本願発明に於ける剪断応力が均一に作用するので樹脂の均一分散効果が発揮されるので好ましい。
本発明で使用する二軸押出機は、従来タイプの押出機に比較して、スクリュ−回転数が1200〜6000rpmであり、かつ周速度2〜25m/secに限定するものである。スクリュー回転数が1200rpmであり周速度が2m/sec以下では樹脂組成物の充分な混練が行われず好ましくない、又、スクリュー回転数が60rpmであり周速度25m/sec以上では混練効果に変化が見られない。
【0012】
【実施例】
以下に、実施例及び比較例を述べる。
実施例1
MFR40のポリエチレン70重量部(以後部と略す)と、エチレン含有量26%でム−ニ−粘度26のエチレンプロピレンゴム30部を、周速度25m/secで自在方向に回転する二軸噛合わせでありL/D=41.5で直径30mmのスクリュ−を有し、該スクリュ−が(イ)輸送部、(ロ)溶融混練部及び(ハ)計量押出部からなり長さの割合が(イ):(ロ)=1:3で、溶融混練部8D〜20Dの間に二条順ニ−ディングを装着し、シリンダ−内壁とスクリュ−表面とのチップクリアランスが0.04D押出機を使用して、スクリュ−回転数3000(周速度4.7m/sec)で混練して、ポリマーブレンドを製造した。
【0013】
実施例2
MFR40のポリプロピレン70重量部と、プロピレン含有量26%でム−ニ−粘度26のエチレンプロピレンゴム30部を、周速25m/secで自在方向に回転する二軸噛合わせの押出機であり、L/D=41.5のスクリュ−を有し、該スクリュ−が(イ)輸送部、(ロ)溶融混練部及び(ハ)計量押出部からなり長さの割合が(イ):(ロ)=2:1で、溶融混練部22D〜33Dの間に二条順ニ−ディングを装着したチップクリアランス0.04Dの押出機を使用して、スクリュ−回転数3000(周速度4.7m/sec)で混練して、ポリマーブレンドを製造した。
【0014】
実施例3
実施例1で使用の押出機をスクリュ−回転数5000(周速度9.4m/sec)で用い、MFR40のポリプロピレン30部とナイロン6(宇部興産製商品:1013NB)70部を混練してポリマーブレンドを製造した。
実施例4
実施例1で使用の押出機をスクリュ−回転数5000(周速度9.4m/sec)で用い、MFR20のABS樹脂(三菱化学製商品:TFX-20)50部とポリカ−ボネ−ト(出光石油化学製商品:A1900)50部のポリマーブレンドを製造した。
【0015】
実施例5
実施例1で使用の押出機をスクリュ−回転数1500(周速度2.4m/sec)で用い、MFR40のポリプロピレン40部に対してタルク(浅田タルク製商品:JA13R)50部を混合したポリマーブレンドを製造した。
比較例1
実施例1で使用の押出機のスクリュ−回転数400(周速度0.6m/sec)で用いる以外は、実施例1と全て同じである。
比較例2
実施例1に於ける、スクリュ−が(イ)輸送部、(ロ)溶融混練部及び(ハ)計量押出部からなり長さの割合が(イ):(ロ)=10:1で、溶融混練部15D〜41.5Dの間に二条順ニ−ディング、二条逆ニ−ディング及びパイナップルを装着する以外は、実施例1と同じである。
【0016】
比較例3
実施例1に於けるチップクリアランスを0.006Dとする以外は、実施例1と同じである。
比較例4
比較例1での押出機を用い、MFR40のポリプロピレン30部とナイロン6(宇部興産製商品:1013NB)70部を混練して樹脂組成物を製造した。
【0017】
比較例5
実施例1で使用のポリプロピレンとエチレンプロピレンゴムを使用し、スクリュ−構成がL/D=7で樹脂供給部から3D〜7Dの間に三条順ロ−タ−、三条逆ロ−タ−を装着した二軸押出機を用い混練して、樹脂組成物を製造した。
【0018】
以下に実施例1〜実施例5及び比較例1〜比較例5で得られた樹脂組成物について、次の方法により衝撃強度(JIS−K7110に準ずる)及び伸び率(JIS−K7113に準ずる)を測定し、その結果を下記の基準に従い【表1】に示す。
衝撃強度及び伸び率
◎ ……… 従来品に比較して優れた結果を示す。
○ ……… 従来品と同等の結果を示す。
× ……… 従来品に比較して劣る。
【0019】
【表1】

Figure 0004030150
【0020】
【発明の効果】
本発明のポリマーブレンドの製造方法では、該ポリマーブレンド内に於ける海島構造の島部分の粒直径が従来品のポリマ−ブレンドに比較して遙かに微細であるために、引張強度、耐衝撃性等機械的物性に優れている。
本発明のポリマーブレンドの製造方法では、又、本発明のポリマーブレンドは、その製造の際に使用する押出機の樹脂溶融混練部での剪断応力を少ない時間で十分に作用することで、従来のポリマ−ブレンド品のような剪断発熱に長時間曝され極限粘度が大幅に低下し、物性の低下を生じる心配は全くない。
【0021】
【図面の簡単な説明】
図1〜図8は、本発明で用いられる溶融混練部(ロ)に用いるスクリュ−装置類(ディスク)の概略斜視図である。
【図1】本発明の(ロ)で用いる順ニ−ディングである。
【図2】本発明の(ロ)で用いる逆ニ−ディングである。
【図3】本発明の(ロ)で用いる順ロ−タ−である。
【図4】本発明の(ロ)で用いる逆ロ−タ−である。
【図5】本発明の(ロ)で用いるパイナップルである。
【図6】本発明の(ロ)で用いる中立である。
【図7】本発明の(ロ)で用いるワイドである。
【図8】本発明の(ロ)で用いるネジである。[0001]
[Industrial application fields]
The present invention relates to a method for producing a polymer blend having excellent mechanical properties obtained by uniformly kneading and mixing one or more resins, colorants, additives and the like with a base carrier thermoplastic resin. Is.
[0002]
[Prior art]
Conventionally, general-purpose thermoplastic resins such as polyethylene, polypropylene, polyamide, and polystyrene have been widely used in films, injection-molded products, fibers, etc., and they give performance or improve properties according to their use. Therefore, additives such as lubricants, pigments, flame retardants, antistatic agents and fillers are generally kneaded and blended using an extruder.
In recent years, resins with different properties have been kneaded for the purpose of enhancing the functionality of these general-purpose thermoplastic resins, and characteristics such as impact resistance and heat resistance that cannot be obtained with conventional general-purpose thermoplastic resins have been dramatically improved. It has been tried to produce a resin composition (polymer blend, polymer alloy) that has been improved to a high degree, and to add a versatile resin without losing the characteristics of an expensive resin. Development is being actively studied.
[0003]
The above resin composition is poorly compatible with each other in order to knead a plurality of resins having different properties, and thus the resulting composition has a sea-island structure. Has become an important issue.
In general, resins with different properties have poor compatibility, and in order to produce a new polymer blend that is uniformly dispersed by kneading, the extruder screw is rotated at a higher speed than kneading using a general-purpose resin. However, it is necessary to apply a strong shearing stress to a composition composed of a resin, an additive and the like for a long time and knead.
Therefore, when strongly kneading resin, additives, etc. with an extruder, the length L of the resin melt kneading portion occupying the length L of the screw is increased and a strong shear stress is applied for a long time. The ink is discharged after being exposed to shear heat generated for a long time.
[0004]
As a result, the intrinsic viscosity of the resin is greatly reduced, and this causes a problem that the moldability is deteriorated and problems such as mechanical properties such as impact resistance and heat resistance of the product are easily deteriorated. .
This is also the case with twin screw extruders that have been widely used in recent years. In order to strongly knead resins and additives, etc., the twin screw extrusion has increased the length L of the resin melt kneading part occupying the length L of the screw. Kneading using a machine and applying a strong shear stress for a long time, so it is exposed to the shear heat generated for a long time and discharged, and the intrinsic viscosity is greatly reduced, which causes molding There is a drawback that problems such as deterioration of mechanical properties and deterioration of mechanical properties such as impact resistance and heat resistance of products are likely to occur.
[0005]
In addition, when an extruder such as the one described above is used in blending an additive such as a pigment or filler in the thermoplastic resin, the additive tends to cause secondary aggregation during melt kneading of the thermoplastic resin. Therefore, there is a drawback that good dispersion is difficult to obtain.
In addition, when kneading the composition such as resin and additives, the supply amount is reduced in order to reduce the screw rotation speed of the extruder in order to suppress a decrease in the intrinsic viscosity, or to shorten the residence time in the extruder. When the amount is increased, not only a sufficient shear stress is applied but uniform dispersion becomes difficult, and the additives are aggregated, and a satisfactory dispersion / kneading effect cannot be obtained.
[0006]
[Problems to be solved by the invention]
In order to solve the above-mentioned problems, the inventors of the present application followed up the behavior of the thermoplastic resin in the twin-screw extruder. As a result, the shear stress applied to the thermoplastic resin and the additive acted on a part of the screw. It has been found that is concentrated.
Therefore, the mechanism of the resin melt kneading part of the screw in the extruder has been improved so that shear stress acts uniformly and over a wide range of thermoplastic resins and additives. As a result, it was found that a thermoplastic resin composition uniformly dispersed with little decrease in intrinsic viscosity was obtained, and the present invention was completed.
[0007]
[Means for Solving the Problems]
That is, the present invention provides (A) carrier resin with (B) additional resin, (C) colorant and / or (D) additive,
A rotational speed 1200~6000Rpm, and biaxially meshing coaxial rotating freely direction at a peripheral speed 2~25m / sec transport unit, two - loading sets it is turn - loading, Gyakuni - loading, route - A screw having a length L / diameter D = 16 to 83 consisting of a melt kneading part and a metering extruding part which are a rotor, a reverse rotor and / or a screw , and the L / D of the screw melt kneading part This is a method for producing a polymer blend obtained by kneading using an extruder with = 10 to 77.
At this time, two of the melt-kneading part - the loading assembly towards turn - loading, Gyakuni - loading, route - data -, Gyakuro - data - and / or by using an extruder is a screw, excellent The kneading effect is exhibited.
[0008]
Similarly, when the ratio of the tip clearance between the cylinder inner wall surface of the extruder and the screw is 0.1 to 0.01 D, it is easy to produce the polymer blend of the present invention having excellent mechanical properties.
In the present invention, using the extruder described in the claims, the island portion of the sea-island structure formed when the resin of the component (A) and the component (B) having poor compatibility is kneaded is a conventional type extruder. Compared to the island part obtained by use, since the structure of the composition that can be obtained with a finer particle diameter of the island part is made more uniform, a polymer blend with significantly improved impact resistance, elongation ratio, etc. It is obtained.
The component (A) of the present invention is a general-purpose thermoplastic resin that can be easily kneaded by a conventional type extruder. For example, polyethylene resin, polypropylene resin, polystyrene resin, polyester resin, polyamide resin, polycarbonate resin, acrylonitrile resin, PRT, PMMA and the like can be mentioned.
[0009]
On the other hand, the component (B) is a resin that is difficult to mix finely and uniformly when kneaded with the component (A) using a conventional type extruder, such as polyisoprene, polybutene, polyisobutene, polybutadiene, chlorine. And polyethylene oxide, ethylene vinyl acetate copolymer, SBR resin, ABS resin, modified polyolefin, EPDM resin, SEBS, EPR, and NBR.
For example, the polymer blend obtained by blending polyethylene resin or polypropylene resin in component (A) and modified polyolefin in component (B) has a much superior impact value and elongation compared to the conventional product. Shows the rate.
The (C) colorant used in the present invention may be any dye or pigment conventionally used in thermoplastic resins, and various organic pigments and inorganic pigments can be mentioned.
Examples of the additive (D) used in the present invention include talc, barium sulfate, mica, silica, kaolin, clay, antifogging agent, and flame retardant which have been conventionally blended in thermoplastic resins.
[0010]
The extruder used in the present invention is composed of a twin-screw meshing screw having a rotational speed of 1200 to 6000 rpm and rotating in a free direction at a peripheral speed of 2 to 25 m / sec. From the (hopper) side toward the resin discharge port, a transport section (A), a melt-kneading section (B), and a metering extrusion section (C) are configured in this order.
The method of assembling the screw of the melt kneading part (b) effectively gives a shearing stress and a compressive force. The forward kneading shown in FIG. 1, the reverse kneading shown in FIG. 2, the forward kneading shown in FIG. 4, a reverse rotor of FIG. 4, a pineapple of FIG. 5, a neutral of FIG. 6, a wide of FIG. 7, and a screw of FIG. 8. The described kneading may be used alone or in combination.
The screw used in the present invention has a length L / diameter D ratio of 16 to 83, and (b): (b) = 2: 1 to 1: 4, (b) length. If the ratio of (b) is less than (b) = 2: 1, the resin is not sufficiently melt-kneaded, and the ratio of (b) is greater than (b) :( b) = 1: 4. Even so, the effect of the present invention is not improved, so 1: 4 is sufficient.
[0011]
In a state where the minimum chip clearance between the inner wall surface of the extruder and the screw in the melt kneading section (b) is 0.1D to 0.01D, the shear stress in the present invention acts uniformly, so that the resin is uniformly dispersed. Since an effect is exhibited, it is preferable.
The twin-screw extruder used in the present invention has a screw rotation speed of 1200 to 6000 rpm and a peripheral speed of 2 to 25 m / sec as compared with a conventional type extruder. When the screw speed is 1200 rpm and the peripheral speed is 2 m / sec or less, the resin composition is not sufficiently kneaded, and when the screw speed is 60 rpm and the peripheral speed is 25 m / sec or more, the kneading effect changes. I can't.
[0012]
【Example】
Examples and comparative examples will be described below.
Example 1
By biaxial meshing of 70 parts by weight of polyethylene of MFR40 (hereinafter abbreviated as part) and 30 parts of ethylene propylene rubber with an ethylene content of 26% and a Mooney viscosity of 26, rotating freely at a peripheral speed of 25 m / sec. Existence L / D = 41.5 and a screw having a diameter of 30 mm, the screw is composed of (a) a transporting part, (b) a melt-kneading part and (c) a metering extrusion part, and the ratio of the length is (B) = 1: 3, a two-step kneading is installed between the melt-kneading sections 8D to 20D, and the tip clearance between the cylinder inner wall and the screw surface is 0.04D. A polymer blend was produced by kneading at a rotational speed of 3000 (circumferential speed 4.7 m / sec).
[0013]
Example 2
This is a twin screw meshing extruder that rotates 70 parts by weight of MFR40 polypropylene and 30 parts of propylene content and ethylene propylene rubber with Mooney viscosity of 26 at a peripheral speed of 25 m / sec. /D=41.5, the screw is composed of (a) a transporting part, (b) a melt-kneading part and (c) a metering extrusion part, and the ratio of the length is (a): (b) = 2 1 and kneading at a screw speed of 3000 (circumferential speed: 4.7 m / sec) using an extruder with a tip clearance of 0.04D equipped with a double-strip kneading between the melt-kneading sections 22D to 33D A polymer blend was produced.
[0014]
Example 3
Using the extruder used in Example 1 at a screw rotation speed of 5000 (circumferential speed 9.4 m / sec), 30 parts of polypropylene of MFR40 and 70 parts of nylon 6 (Ube Industries product: 1013NB) are kneaded to form a polymer blend . Manufactured.
Example 4
Using the extruder used in Example 1 at a screw speed of 5000 (peripheral speed: 9.4 m / sec), 50 parts of MFR20 ABS resin (product of Mitsubishi Chemical: TFX-20) and polycarbonate (Idemitsu Petroleum) Chemical product: A1900) 50 parts polymer blend was produced.
[0015]
Example 5
Using the extruder used in Example 1 at a screw speed of 1500 (circumferential speed 2.4 m / sec), a polymer blend in which 50 parts of talc (product of JA13R manufactured by Asada Talc) was mixed with 40 parts of polypropylene of MFR40. Manufactured.
Comparative Example 1
Except for use at a screw speed 400 (circumferential speed 0.6 m / sec) of the extruder used in Example 1, all are the same as Example 1.
Comparative Example 2
In Example 1, the screw was composed of (b) a transport section, (b) a melt kneading section, and (c) a metering extruding section, and the length ratio was (b): (b) = 10: 1. Example 2 is the same as Example 1 except that a two-spinning kneading, a two-spinning reverse kneading and a pineapple are mounted between the kneading sections 15D to 41.5D.
[0016]
Comparative Example 3
Example 1 is the same as Example 1 except that the tip clearance in Example 1 is 0.006D.
Comparative Example 4
Using the extruder in Comparative Example 1, 30 parts of MFR40 polypropylene and 70 parts of nylon 6 (Ube Industries product: 1013NB) were kneaded to produce a resin composition.
[0017]
Comparative Example 5
The polypropylene and ethylene propylene rubber used in Example 1 are used, and the screw configuration is L / D = 7, and a three-way forward rotor and a three-row reverse rotor are mounted between 3D and 7D from the resin supply unit. The resin composition was manufactured by kneading using the twin screw extruder.
[0018]
For the resin compositions obtained in Examples 1 to 5 and Comparative Examples 1 to 5, the impact strength (according to JIS-K7110) and the elongation (according to JIS-K7113) are measured by the following methods. The results are shown in Table 1 in accordance with the following criteria.
Impact strength and elongation rate ◎… Excellent results compared to conventional products.
○ ……… Shows the same results as conventional products.
× ……… Inferior to conventional products.
[0019]
[Table 1]
Figure 0004030150
[0020]
【The invention's effect】
In the method of manufacturing the polymer blends of the present invention, the particle diameter of the island portion of the at sea-island structure in the polymer blend conventional polymer - in order to be fine much compared to the blend, the tensile strength, impact Excellent mechanical properties such as properties.
In the method of manufacturing the polymer blends of the present invention, also, the polymer blends of the present invention is to work well in less time shear stress in the resin melt-kneading of the extruder to be used in its manufacture, the conventional There is no fear that the intrinsic viscosity is greatly lowered by exposure to a shearing heat for a long time like a polymer blend product and the physical properties are not lowered at all.
[0021]
[Brief description of the drawings]
1 to 8 are schematic perspective views of screw devices (discs) used in a melt kneading section (b) used in the present invention.
FIG. 1 is a sequential needing used in (b) of the present invention.
FIG. 2 is the reverse needing used in (b) of the present invention.
FIG. 3 is a forward rotor used in (b) of the present invention.
FIG. 4 is a reverse rotor used in (b) of the present invention.
FIG. 5 is a pineapple used in (b) of the present invention.
FIG. 6 is neutral used in (b) of the present invention.
FIG. 7 is a wide image used in (b) of the present invention.
FIG. 8 is a screw used in (b) of the present invention.

Claims (2)

(A)担体樹脂に対して、(B)追加樹脂、(C)着色剤及び/又は(D)添加剤を、回転数1200〜6000rpmであり、かつ周速度2〜25m/secで自在方向に回転する二軸噛合わせ同軸で輸送部、ニ−ディング組方が順ニ−ディング、逆ニ−ディング、順ロ−タ−、逆ロ−タ−、パイナップル、中立、ワイド及び/又はネジである溶融混練部、及び計量押出部からなる長さL/直径D= 16 83のスクリュ−を有し、該スクリュ−溶融混練部のL/D=10〜77である押出機を用い混練して得られるポリマーブレンドの製造方法。(A) With respect to the carrier resin, (B) additional resin, (C) colorant and / or (D) additive can be freely rotated at a rotational speed of 1200 to 6000 rpm and a peripheral speed of 2 to 25 m / sec. Rotating two-axis meshing coaxial and transport section, the needing assembly is forward kneading, reverse kneading, forward rotor, reverse rotor, pineapple, neutral, wide and / or screw A screw having a length L / diameter D = 16 to 83 consisting of a melt kneading part and a metering extruding part, and kneading using an extruder having L / D = 10 to 77 of the screw melt kneading part A method for producing the resulting polymer blend . 第1請求項記載押出機のシリンダー内壁面とスクリューとのチップクリアランスの割合が0.1〜0.01Dであるポリマーブレンドの製造方法。A method for producing a polymer blend , wherein the ratio of the tip clearance between the cylinder inner wall surface and the screw of the extruder according to claim 1 is 0.1 to 0.01D.
JP09436497A 1997-03-31 1997-03-31 Production method of polymer blend Expired - Fee Related JP4030150B2 (en)

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JP3499414B2 (en) * 1996-12-24 2004-02-23 株式会社神戸製鋼所 Twin screw kneader
DE59905379D1 (en) * 1998-01-23 2003-06-12 Kloeckner Desma Schuhmaschinen Use of a device for shot-wise mixing and dispensing of in the cavity of a mold of an injection molding ausreagierenden and curing multi-component plastics
JP4745684B2 (en) * 2004-03-31 2011-08-10 独立行政法人産業技術総合研究所 Method for producing polymer blend material
CN1956827B (en) * 2004-06-03 2010-11-24 三菱重工业株式会社 Continuous kneading device and kneading system using the same
KR100850077B1 (en) 2004-06-03 2008-08-04 미츠비시 쥬고교 가부시키가이샤 Continuous kneading device and kneading system using the same
JP4781724B2 (en) * 2005-06-09 2011-09-28 三菱重工業株式会社 Continuous kneading apparatus and kneading system having the apparatus
JP7093681B2 (en) * 2018-04-09 2022-06-30 芝浦機械株式会社 Kneading method and kneaded product
WO2019198479A1 (en) * 2018-04-09 2019-10-17 東芝機械株式会社 Kneading method and kneaded material

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