JPH06234121A - Granulation of alfa-olefin polymer - Google Patents

Granulation of alfa-olefin polymer

Info

Publication number
JPH06234121A
JPH06234121A JP5024060A JP2406093A JPH06234121A JP H06234121 A JPH06234121 A JP H06234121A JP 5024060 A JP5024060 A JP 5024060A JP 2406093 A JP2406093 A JP 2406093A JP H06234121 A JPH06234121 A JP H06234121A
Authority
JP
Japan
Prior art keywords
polymerization
extruder
granulation
olefin polymer
propylene
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
Application number
JP5024060A
Other languages
Japanese (ja)
Inventor
Kazuyoshi Sato
和敬 佐藤
Katsuhiro Furukawa
勝啓 古川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP5024060A priority Critical patent/JPH06234121A/en
Publication of JPH06234121A publication Critical patent/JPH06234121A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B29C48/395Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders

Landscapes

  • 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)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

PURPOSE:To perform stable granulation free from entrainment of a foreign matter and surging by granulating alfa-olefin polymer powder which is obtained by polymerization using a single-site catalyst using a specific extrusion machine. CONSTITUTION:Either a single screw type or a twin screw type of an extruder having bearings at least, at two positions in the upstream and the downstream side along the flow of resin can be used for granulation. If the bearings are to be installed at two positions, it should be installed at a most variable position, preferably at the tip 10 in the case of a cantilever type, in addition to the bearing provided at a screw shaft. Further, it is preferred that the bearing should be provided at an additional position between the rear end and the tip 10.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は製品への異物混入がなく
押出機の運転安定性に優れたα−オレフィン重合体の造
粒方法に関する。詳しくは特定の押出機を用いる方法に
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for granulating an .alpha.-olefin polymer which is free from inclusion of foreign matter in a product and which is excellent in operation stability of an extruder. Specifically, it relates to a method using a specific extruder.

【0002】[0002]

【従来の技術】α−オレフィン重合体は自動車、家電な
どの分野を中心に用途展開が拡大している。これにとも
ない、剛性、耐衝撃性、透明性、光沢などの諸性質に対
する要求水準は年々ますます高まってきている。α−オ
レフィン重合体は、いわゆるチーグラー・ナッタ触媒を
用いて重合反応を行わせることによって得られることは
良く知られているが、近年これに加えて、メタロセン触
媒などのシングルサイト触媒を用いる方法も提案されて
いる。(特開昭61−211307号、特開昭62−1
19215号、特開昭62−121707号、特開昭6
3−66206号各公報)また重合体パウダーの造粒に
ついては特定の造粒機を用いる方法が提案されている。
(特開昭60−174612号、特開昭60−1746
13号、特開昭60−217112号各公報)
2. Description of the Related Art Applications of .alpha.-olefin polymers are expanding mainly in fields such as automobiles and home appliances. Along with this, the required standards for various properties such as rigidity, impact resistance, transparency, and gloss have been increasing year by year. It is well known that an α-olefin polymer can be obtained by carrying out a polymerization reaction using a so-called Ziegler-Natta catalyst, but recently, in addition to this, a method using a single-site catalyst such as a metallocene catalyst is also available. Proposed. (JP-A-61-211307, JP-A-62-1)
19215, JP 62-121707 A, JP 6
For the granulation of polymer powder, a method using a specific granulator has been proposed.
(JP-A-60-174612, JP-A-60-1746
No. 13, JP-A-60-217112)

【0003】[0003]

【発明が解決しようとする課題】しかしながら、シング
ルサイト触媒を用いて重合して得られたパウダーはMw
/Mnでみた分子量分布が約2であり従来の5〜30と
比べて非常にシャープであるため、押出機での可塑化挙
動がチーグラー・ナッタ触媒を用いて重合したパウダー
と著しく異なり、通常の片持ちの押出機では造粒時にサ
ージングなどの不安定現象が発生し、スクリューのかじ
り、破損等につながるとともに最終製品に異物が混入
し、品質に悪影響を及ぼすという問題があった。
However, the powder obtained by polymerization using a single-site catalyst has a Mw
/ Mn has a molecular weight distribution of about 2, which is much sharper than the conventional 5-30, and therefore the plasticization behavior in the extruder is significantly different from that of the powder polymerized using the Ziegler-Natta catalyst. In a cantilever extruder, there was a problem that an unstable phenomenon such as surging occurred during granulation, leading to screw galling and damage, and foreign matter mixed into the final product, which adversely affects the quality.

【0004】[0004]

【課題を解決するための手段】本発明者らは、シングル
サイト触媒を用いて重合して得られた重合体パウダーを
最終製品の品質をそこなうことなく造粒する方法につい
て鋭意検討を重ねた結果、樹脂の流れにそって上流側及
び下流側の少なくとも2ヶ所に軸受を有する押出機を用
いて造粒することにより、得られるα−オレフィン重合
体への異物混入がなく、かつ極めて安定に造粒できるこ
とを見出し、本発明に到達した。
[Means for Solving the Problems] As a result of intensive studies by the present inventors, a method for granulating a polymer powder obtained by polymerization using a single-site catalyst without impairing the quality of the final product By granulating using an extruder having bearings at least at two locations on the upstream side and the downstream side along the flow of the resin, foreign matter is not mixed into the obtained α-olefin polymer, and the production is extremely stable. They have found that they can form grains and have reached the present invention.

【0005】すなわち本発明は、シングルサイト触媒を
用いてα−オレフィンを重合して得たα−オレフィン重
合体パウダーを、樹脂の流れにそって上流側及び下流側
の少なくとも2ヶ所に軸受を有する押出機を用いて造粒
することを特徴とするα−オレフィン重合体の造粒方法
に関するものである。本発明において、α−オレフィン
重合体パウダーとしてはα−オレフィンを公知のシング
ルサイト触媒を用いて重合したものが用いられる。用い
られるα−オレフィンとしてはエチレン、プロピレン、
1−ブテン、4−メチル−1−ペンテン、1−ヘキセ
ン、1−オクテン、1−デセン、1−ドデセン、1−テ
トラデセン、1−ヘキサデセン、1−オクタデセン、1
−エイコセンなどのα−オレフィンを挙げることができ
る。これらを単独で重合したもの、また二種以上を共重
合したものが用いられる。たとえば、エチレンを単独重
合して得られた高密度ポリエチレン、エチレンと炭素数
3以上のα−オレフィンとを共重合して得られた直鎖状
低密度ポリエチレン、プロピレンを単独重合して得られ
たプロピレンホモ重合体、始めにプロピレンを重合し、
続いてエチレン又はエチレンとプロピレンを共重合して
得られたプロピレンブロック共重合体、プロピレンと少
量のエチレンを共重合して得られたプロピレンランダム
共重合体、1−ブテンを単独重合して得られたポリブテ
ンなどが用いられる。
That is, according to the present invention, an α-olefin polymer powder obtained by polymerizing an α-olefin by using a single-site catalyst has bearings at at least two locations on the upstream side and the downstream side along the resin flow. The present invention relates to a method for granulating an α-olefin polymer, which comprises granulating using an extruder. In the present invention, as the α-olefin polymer powder, an α-olefin polymerized by using a known single-site catalyst is used. The α-olefin used is ethylene, propylene,
1-butene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1
Mention may be made of α-olefins such as eicosene. Those obtained by polymerizing these alone or those obtained by copolymerizing two or more thereof are used. For example, high-density polyethylene obtained by homopolymerizing ethylene, linear low-density polyethylene obtained by copolymerizing ethylene with an α-olefin having 3 or more carbon atoms, and propylene homopolymerizing Propylene homopolymer, first polymerizing propylene,
Subsequently, ethylene or a propylene block copolymer obtained by copolymerizing ethylene and propylene, a propylene random copolymer obtained by copolymerizing propylene and a small amount of ethylene, and a homopolymer of 1-butene are obtained. Polybutene or the like is used.

【0006】シングルサイト触媒としてはより具体的に
は、チタン、ジルコニウム、ハフニウムなどのメタロセ
ン触媒とアルミノオキサン成分からなる触媒、またメタ
ロセン触媒とアリールまたはアルキル置換ホウ素化合物
からなる触媒が挙げられる。重合反応は、回分式、半回
分式、連続式のいずれの方法によっても実施可能である
が、実質的に液状媒体が存在しない状態での気相重合
法、プロピレン自体を液状媒体として用いるバルク重合
法、重合に不活性な炭化水素系液状媒体を用いるスラリ
ー重合法などが採用できる。重合圧力は常圧から50k
g/cm2 ゲージ、重合温度は常温から100℃であ
る。
Specific examples of the single-site catalyst include a catalyst composed of a metallocene catalyst such as titanium, zirconium and hafnium and an aluminoxane component, and a catalyst composed of a metallocene catalyst and an aryl- or alkyl-substituted boron compound. The polymerization reaction can be carried out by any of batch type, semi-batch type and continuous type methods, but it is a gas phase polymerization method in the absence of a liquid medium, and bulk polymerization using propylene itself as the liquid medium. A legal method, a slurry polymerization method using a hydrocarbon-based liquid medium inert to the polymerization, and the like can be adopted. Polymerization pressure is 50k from normal pressure
The g / cm 2 gauge and the polymerization temperature are from room temperature to 100 ° C.

【0007】重合反応によって得られたα−オレフィン
重合体パウダーは、熱安定剤、滑剤などまた必要に応じ
て更に帯電防止剤、耐候剤、造核剤などと共に押出機に
よって造粒される。本発明において重要なことは、特定
の押出機を用いることによって、α−オレフィン重合体
への異物混入がなく、かつサージング現象などもなく安
定に造粒できるという点にある。すなわち、樹脂の流れ
にそって上流側及び下流側の少なくとも2ヶ所に軸受を
有する押出機を用いて造粒することがきわめて重要であ
り、通常の上流側のみに軸受を有する押出機を用いて造
粒したものでは本発明の目的を達することはできない。
The α-olefin polymer powder obtained by the polymerization reaction is granulated by an extruder together with a heat stabilizer, a lubricant and, if necessary, an antistatic agent, a weathering agent, a nucleating agent and the like. What is important in the present invention is that by using a specific extruder, it is possible to stably granulate the α-olefin polymer without the inclusion of foreign matter and without the surging phenomenon. That is, it is extremely important to granulate by using an extruder having bearings at least at two positions on the upstream side and the downstream side along the flow of resin, and it is very important to use an extruder having bearings only on the normal upstream side. The granulated product cannot achieve the purpose of the present invention.

【0008】本発明に用いられる押出機は樹脂の流れに
そって上流側及び下流側の少なくとも2ヶ所に軸受を有
するタイプのものであれば、単軸スクリュー型、2軸ス
クリュー型のいずれであっても利用できるが、例えば図
1のような押出機が好ましく用いられる。またギアポン
プを組み合わせた押出機も利用できる。軸受の位置は通
常の片持ちの場合にはスクリュー軸の後端、すなわち樹
脂の流れにそった上流側のみであるが、本発明のように
少なくとも2ヶ所に軸受を設ける場合には、スクリュー
軸の後端に加えて、片持ちの場合に一番変動する位置な
らばどこでも設けることができる。好ましくはスクリュ
ー軸の後端に1ヶ所、先端に1ヶ所、より好ましくは後
端と先端の間にもう1ヶ所設けると良い。
The extruder used in the present invention may be either a single-screw type or a twin-screw type as long as it has a bearing at at least two positions on the upstream side and the downstream side along the resin flow. However, the extruder as shown in FIG. 1 is preferably used. An extruder combined with a gear pump can also be used. In the case of a normal cantilever, the position of the bearing is only at the rear end of the screw shaft, that is, on the upstream side along the flow of the resin. However, when the bearing is provided at at least two places as in the present invention, the screw shaft is In addition to the rear end, it can be provided at any position that varies most when cantilevered. It is preferable to provide one at the rear end of the screw shaft, one at the front end, and more preferably one at the rear end and the front end.

【0009】[0009]

【実施例】以下、実施例により本発明をさらに具体的に
説明するが、実施例中で用いる各測定値は、以下に示す
方法に準じ測定したものである。 MFI(プロピレン系重合体):JIS K7210
条件14 MI(ポリエチレン):JIS K7210 条件4 エチレン含有量(プロピレン系重合体):日本分光工業
株式会社製IR−700を用いて赤外吸収スペクトルに
より決定した。
EXAMPLES The present invention will be described in more detail with reference to the following examples. Each measured value used in the examples is measured according to the method described below. MFI (Propylene polymer): JIS K7210
Condition 14 MI (polyethylene): JIS K7210 Condition 4 Ethylene content (propylene polymer): Determined by infrared absorption spectrum using IR-700 manufactured by JASCO Corporation.

【0010】(A720 /A900 利用) Mw/Mn:Waters社製150C−GPCを用い
てゲルパーミエーションクロマトグラフィーにより決定
した。 また押出機のサージング現象については、可塑化ゾーン
に取り付けた圧力計の指示値の変動を測定し、その平均
圧力に対するふれ幅の大小(ΔP/Pav)及び押出機
モーターの電流計の指示値の変動を測定し、その平均電
流に対するふれ幅の大小(ΔA/Aav)により判定し
た。
(Using A 720 / A 900 ) Mw / Mn: Determined by gel permeation chromatography using 150C-GPC manufactured by Waters. Regarding the surging phenomenon of the extruder, the fluctuation of the indicated value of the pressure gauge attached to the plasticization zone was measured, and the fluctuation of the deviation (ΔP / Pav) with respect to the average pressure and the indicated value of the ammeter of the extruder motor were measured. The fluctuation was measured, and it was judged by the magnitude (ΔA / Aav) of the deflection width with respect to the average current.

【0011】押出機スクリューのかじりについては、か
じり音の発生の有無及び造粒したペレットの外観を検査
し、かじりによって発生した異物混入の有無により判定
した。
Regarding the galling of the extruder screw, the presence or absence of galling noise and the appearance of the granulated pellets were inspected, and the presence or absence of foreign matter generated by galling was judged.

【0012】[0012]

【実施例1】 [重合]シングルサイト触媒を用いて重合して得られた
プロピレンホモ重合体パウダーを保有する撹拌機付き反
応器を用いて、重合温度90℃、重合圧力32kg/c
2 ゲージの条件を保持するように、プロピレン、水
素、触媒成分を連続的にフィードし、重合を行った。触
媒成分としては、ジメチルシリレンビス(2,4−ジメ
チルシクロペンタジエニル)ジルコニウムジクロライド
及びメチルアルミノオキサンを用いた。パウダーのMF
Iは水素フィード量によりコントロールした。得られた
パウダーのMFIは3.9で、Mw/Mnは1.9であ
った。
Example 1 [Polymerization] Using a reactor equipped with a stirrer having a propylene homopolymer powder obtained by polymerizing using a single-site catalyst, a polymerization temperature of 90 ° C. and a polymerization pressure of 32 kg / c.
Polymerization was carried out by continuously feeding propylene, hydrogen and a catalyst component so as to maintain the condition of m 2 gauge. Dimethylsilylene bis (2,4-dimethylcyclopentadienyl) zirconium dichloride and methylaluminoxane were used as catalyst components. Powder MF
I was controlled by the amount of hydrogen feed. The obtained powder had MFI of 3.9 and Mw / Mn of 1.9.

【0013】[造粒]重合によって得られたパウダーに
添加剤としてテトラキス(2,4−ジ−t−ブチルフェ
ニル)−4,4’−ビフェニレンフォスフォナイトを
0.05重量%及びステアリン酸カルシウムを0.1重
量%を混合し、図1記載のスクリュー軸の先端及び後端
双方に軸受を有する2軸押出機を用いて造粒した。サー
ジング現象及びかじり音の発生は全く認められなかっ
た。また造粒ペレットへの異物混入もなかった。結果は
表1に示す通りである。
[Granulation] 0.05% by weight of tetrakis (2,4-di-t-butylphenyl) -4,4'-biphenylenephosphonite and calcium stearate as additives were added to the powder obtained by the polymerization. 0.1 wt% was mixed and granulated using a twin-screw extruder having bearings at both the front and rear ends of the screw shaft shown in FIG. Neither the surging phenomenon nor the squealing noise was observed. Also, no foreign matter was mixed into the granulated pellets. The results are shown in Table 1.

【0014】[0014]

【実施例2】 [重合]シングルサイト触媒を用いて重合して得られた
プロピレンブロック共重合体パウダーを保有する撹拌機
付き反応器を2個連結してなるプロセスを用いて重合を
行った。第一段の反応器の重合温度70℃、重合圧力2
8kg/cm2 ゲージの条件を保持するように、プロピ
レン、水素、触媒成分を連続的にフィードし、重合を行
った。触媒成分としては、ジメチルシリレンビス(2,
4−ジメチルシクロペンタジエニル)ジルコニウムジク
ロライド及びメチルアルミノオキサンを用いた。生成す
るパウダーのMFIが2になるように水素フィード量を
コントロールした。第一段で重合されたパウダーはプロ
ピレンガスとともに第二段の反応器へ送られ、新たにエ
チレンをフィードしプロピレンとエチレンの共重合を行
った。第二段の反応器は重合温度55℃、重合圧力15
kg/cm2ゲージの条件を保持するように未反応の混
合ガスを系外にベントした。またパウダーのMFI、エ
チレン含有量は水素フィード量及びエチレンフィード量
によりコントロールした。得られたパウダーのMFIは
2.0、エチレン含有量は8.3重量%、Mw/Mnは
2.2であった。
Example 2 [Polymerization] Polymerization was carried out using a process in which two reactors equipped with a stirrer, each having a propylene block copolymer powder obtained by polymerization using a single-site catalyst, were connected. Polymerization temperature of the first stage reactor 70 ° C, polymerization pressure 2
Polymerization was carried out by continuously feeding propylene, hydrogen, and a catalyst component so as to maintain the condition of 8 kg / cm 2 gauge. As the catalyst component, dimethylsilylene bis (2,
4-Dimethylcyclopentadienyl) zirconium dichloride and methylaluminoxane were used. The hydrogen feed amount was controlled so that the MFI of the produced powder was 2. The powder polymerized in the first stage was sent to the reactor in the second stage together with propylene gas, and ethylene was newly fed to copolymerize propylene and ethylene. The second stage reactor has a polymerization temperature of 55 ° C and a polymerization pressure of 15
An unreacted mixed gas was vented to the outside of the system so that the condition of kg / cm 2 gauge was maintained. The MFI and ethylene content of the powder were controlled by the hydrogen feed amount and ethylene feed amount. The obtained powder had MFI of 2.0, ethylene content of 8.3% by weight, and Mw / Mn of 2.2.

【0015】[造粒]実施例1と同様の方法にて実施し
た。サージング現象及びかじり音の発生は全く認められ
なかった。また造粒ペレットへの異物混入もなかった。
結果は表1に示す通りである。
[Granulation] The same procedure as in Example 1 was carried out. Neither the surging phenomenon nor the squealing noise was observed. Also, no foreign matter was mixed into the granulated pellets.
The results are shown in Table 1.

【0016】[0016]

【実施例3】 [重合]シングルサイト触媒を用いて重合して得られた
高密度ポリエチレンパウダーを保有する撹拌機付き反応
器を用いて、重合温度90℃、重合圧力21kg/cm
2 ゲージの条件を保持するように、エチレン、水素、触
媒成分を連続的にフィードし、重合を行った。触媒成分
としては、ジメチルシリレンビス(2,4−ジメチルシ
クロペンタジエニル)ジルコニウムジクロライド及びメ
チルアルミノオキサンを用いた。パウダーのMFIは水
素フィード量によりコントロールした。得られたパウダ
ーのMFIは1.1で、Mw/Mnは2.0であった。
Example 3 [Polymerization] Obtained by polymerization using a single-site catalyst
Reaction with stirrer holding high density polyethylene powder
Polymerization temperature 90 ℃, Polymerization pressure 21kg / cm
2Keep ethylene, hydrogen, and catalyst
The medium component was continuously fed to carry out polymerization. Catalyst component
Dimethylsilylene bis (2,4-dimethyl
Clopentadienyl) zirconium dichloride and
Chill aluminoxane was used. Powder MFI is water
It was controlled by the amount of elementary feed. Obtained powder
MFI was 1.1 and Mw / Mn was 2.0.

【0017】[造粒]実施例1と同様の方法にて実施し
た。サージング現象及びかじり音の発生は全く認められ
なかった。また造粒ペレットへの異物混入もなかった。
結果は表1に示す通りである。
[Granulation] The same procedure as in Example 1 was carried out. Neither the surging phenomenon nor the squealing noise was observed. Also, no foreign matter was mixed into the granulated pellets.
The results are shown in Table 1.

【0018】[0018]

【比較例1】スクリュー軸の後端側のみに軸受を有する
2軸押出機を使用する他は実施例1と同様の方法にて重
合、造粒を行った。造粒に際しては激しくサージングを
起こし、スクリューのかじり音が発生し、押出機を安定
に運転することができなかった。また造粒ペレットへの
異物混入が認められた。結果を表1に示す。
Comparative Example 1 Polymerization and granulation were performed in the same manner as in Example 1 except that a twin-screw extruder having a bearing only on the rear end side of the screw shaft was used. During granulation, vigorous surging occurred, and a screwing noise was generated, and the extruder could not be operated stably. Further, it was confirmed that foreign matters were mixed in the granulated pellets. The results are shown in Table 1.

【0019】[0019]

【比較例2】スクリュー軸の後端側のみに軸受を有する
単軸押出機を使用する他は実施例2と同様の方法にて重
合、造粒を行った。造粒に際しては激しくサージングを
起こし、スクリューのかじり音が発生し、押出機を安定
に運転することができなかった。また造粒ペレットへの
異物混入が認められた。結果を表1に示す。
Comparative Example 2 Polymerization and granulation were performed in the same manner as in Example 2 except that a single screw extruder having a bearing only on the rear end side of the screw shaft was used. During granulation, vigorous surging occurred, and a screwing noise was generated, and the extruder could not be operated stably. Further, it was confirmed that foreign matters were mixed in the granulated pellets. The results are shown in Table 1.

【0020】[0020]

【表1】 [Table 1]

【0021】[0021]

【発明の効果】本発明の造粒方法により、シングルサイ
ト触媒を用いて重合したα−オレフィン重合体パウダー
においても押出機を安定に運転することができるととも
に、異物混入のない優れた品質の製品が得られるといっ
た著しい効果を得ることができる。
According to the granulation method of the present invention, an extruder can be stably operated even with an α-olefin polymer powder polymerized by using a single-site catalyst, and a product of excellent quality without contamination by foreign matter. It is possible to obtain a remarkable effect such as

【図面の簡単な説明】[Brief description of drawings]

【図1】図は本発明の方法を実施できる押出機の概略図
である。
1 is a schematic diagram of an extruder capable of carrying out the method of the present invention.

【符号の説明】[Explanation of symbols]

1 ロングロータ 2 コネクチング歯車 3 球面ころ軸受 4 スラスト軸受 5 ダストストップ 6 ホッパセクション 7 チャンバ 8 オリフィス 9 スリーブ 10 球面ころ軸受 11 ダストストップ 12 油圧シリンダー 1 Long Rotor 2 Connecting Gear 3 Spherical Roller Bearing 4 Thrust Bearing 5 Dust Stop 6 Hopper Section 7 Chamber 8 Orifice 9 Sleeve 10 Spherical Roller Bearing 11 Dust Stop 12 Hydraulic Cylinder

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 シングルサイト触媒を用いてα−オレフ
ィンを重合して得たα−オレフィン重合体パウダーを、
樹脂の流れにそって上流側及び下流側の少なくとも2ヶ
所に軸受を有する押出機を用いて造粒することを特徴と
するα−オレフィン重合体の造粒方法。
1. An α-olefin polymer powder obtained by polymerizing an α-olefin using a single-site catalyst,
A method for granulating an α-olefin polymer, which comprises granulating using an extruder having bearings at least at two locations on the upstream side and the downstream side along the flow of the resin.
【請求項2】 α−オレフィン重合体パウダーがプロピ
レン系重合体であることを特徴とする請求項1記載のα
−オレフィン重合体の造粒方法。
2. The α according to claim 1, wherein the α-olefin polymer powder is a propylene polymer.
-Olefin polymer granulation method.
JP5024060A 1993-02-12 1993-02-12 Granulation of alfa-olefin polymer Pending JPH06234121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5024060A JPH06234121A (en) 1993-02-12 1993-02-12 Granulation of alfa-olefin polymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5024060A JPH06234121A (en) 1993-02-12 1993-02-12 Granulation of alfa-olefin polymer

Publications (1)

Publication Number Publication Date
JPH06234121A true JPH06234121A (en) 1994-08-23

Family

ID=12127913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5024060A Pending JPH06234121A (en) 1993-02-12 1993-02-12 Granulation of alfa-olefin polymer

Country Status (1)

Country Link
JP (1) JPH06234121A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843222A4 (en) * 1995-08-02 1998-10-28 Hoechst Res & Tech Gmbh & Co Electrophotographic toner
JP2011152705A (en) * 2010-01-27 2011-08-11 Kobe Steel Ltd Continuous kneader
CN105308077A (en) * 2012-09-21 2016-02-03 巴塞尔聚烯烃意大利有限公司 Process for the gas-phase polymerization of olefins

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843222A4 (en) * 1995-08-02 1998-10-28 Hoechst Res & Tech Gmbh & Co Electrophotographic toner
JP2011152705A (en) * 2010-01-27 2011-08-11 Kobe Steel Ltd Continuous kneader
CN105308077A (en) * 2012-09-21 2016-02-03 巴塞尔聚烯烃意大利有限公司 Process for the gas-phase polymerization of olefins

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