JPH09122408A - Filter device for molten polymer - Google Patents
Filter device for molten polymerInfo
- Publication number
- JPH09122408A JPH09122408A JP7283045A JP28304595A JPH09122408A JP H09122408 A JPH09122408 A JP H09122408A JP 7283045 A JP7283045 A JP 7283045A JP 28304595 A JP28304595 A JP 28304595A JP H09122408 A JPH09122408 A JP H09122408A
- Authority
- JP
- Japan
- Prior art keywords
- polymer
- filter
- center shaft
- housing
- sectional area
- 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
- 229920000642 polymer Polymers 0.000 title claims abstract description 78
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims description 36
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 description 11
- 230000014759 maintenance of location Effects 0.000 description 10
- 239000012530 fluid Substances 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/39—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
- B01D29/41—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/44—Special measures allowing the even or uniform distribution of fluid along the length of a conduit
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は溶融ポリマーの濾過
装置に関し、更に詳しくはフイルターハウジングでの溶
融ポリマーの流速分布を小さくし、滞留による溶融ポリ
マーの熱劣化を回避して、ゲル化ポリマーの生成を抑制
する溶融ポリマーの濾過装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molten polymer filtering device, and more particularly to a method for forming a gelled polymer by reducing the flow velocity distribution of the molten polymer in a filter housing and avoiding thermal degradation of the molten polymer due to retention. The present invention relates to a molten polymer filtration device that suppresses
【０００２】[0002]
【従来の技術】溶融した熱可塑性ポリマーを濾過精製す
るフイルターとして、通常、円筒状フイルター又はリー
フディスクフイルターが使用されている。一般に、後者
は前者に比して高価ではあるが、耐圧性があるため高粘
度溶融ポリマーの濾過或は精密濾過に適し、また容積の
割に大ききな濾過面積が確保できるため、溶融ポリマー
が濾過工程を通過する時間を短くすることができ、熱劣
化を生じやすいポリマーの溶融濾過に適している。2. Description of the Related Art As a filter for filtering and refining a molten thermoplastic polymer, a cylindrical filter or a leaf disc filter is usually used. Generally, the latter is more expensive than the former, but because it has pressure resistance, it is suitable for filtration or microfiltration of high-viscosity molten polymer, and since a large filtration area can be secured for its volume, the molten polymer is The time required for passing through the filtration step can be shortened, and this is suitable for melt filtration of a polymer that easily causes thermal deterioration.
【０００３】しかし、製品の多様化に伴って素材の熱可
塑性ポリマーも多様化し、例えば流動性の低いもの、耐
熱性の低いもの、融点が高いため熱劣化を生じ易いもの
等を溶融成形する必要があり、またポリマー劣化物に起
因する欠点の許容基準が著しく厳しい製品を製造する必
要があって、ポリマ熱劣化の著しく低減された濾過装置
が求められている。However, with the diversification of products, the thermoplastic polymers of the materials have also diversified, and it is necessary to melt-mold, for example, those having low fluidity, those having low heat resistance, those which are prone to thermal deterioration due to their high melting points. In addition, there is a need for producing a product having extremely strict criteria for accepting defects caused by polymer deterioration products, and thus there is a demand for a filter device with significantly reduced polymer heat deterioration.
【０００４】これらの課題を解決する手段として、従
来、大別して２つの手段が提案されている。第一の手段
は、フイルター自身の滞留部をなくす改良で、例えば実
開昭６０−８６４２６号、実開昭６１−１７５４１８
号、実開昭６０−１７９３０８号、特開平２−１１５０
０９号、実開平４−１２６７０５、実開平４−７０１１
２号、実開平３−４７００７号が提案されている。第二
の手段は、多段に積層したフイルターとハウジング或は
フランジとの境界部に生じるポリマー滞留をなくす改良
である。後者の場合、これらの改良を施しても、例えば
溶融ポリエステルの長時間濾過に使用したフイルターセ
ットを、ハウジングから抜出してポリマー熱劣化の状態
を観察すると、最下段のリーフディスクフイルターとフ
ランジの境界面、及び最下段のリーフディスクフイルタ
ーとハウジングの境界面にポリマー劣化が認められる。
この滞留劣化を回避する方法として、特開昭６０−９０
０１７号では、ハウジングの内のり断面積を、流体の流
れ方向に沿って徐々に縮小して、フイルター下流部での
ハウジングとの境界面におけるポリマー流速の低下を防
ぐことを提案している。この方法は、フイルター下流部
でのハウジングとの境界面における滞留の低減には有効
であるが、最下段のリーフディスクフイルターとフラン
ジの境界面の滞留抑制効果は乏しい。加えてフイルター
セットの抜出し、解体作業が煩雑になる問題がある。As means for solving these problems, there have conventionally been roughly proposed two means. The first means is to improve the retention part of the filter itself, for example, Japanese Utility Model Publication Nos. 60-86426 and 61-175418.
No. 60-179308, JP-A 2-1150.
09, Actual Kaihei 4-126705, Actual Kaihei 4-7011
No. 2 and Jitsukaihei 3-47007 are proposed. The second measure is an improvement to eliminate polymer retention that occurs at the boundary between the multi-layered filter and the housing or flange. In the latter case, even if these improvements are made, if the filter set used for long-time filtration of molten polyester is pulled out from the housing and the state of polymer thermal degradation is observed, the boundary surface between the leaf disc filter at the bottom and the flange , And the deterioration of the polymer is observed at the interface between the leaf disc filter at the bottom and the housing.
As a method of avoiding this retention deterioration, Japanese Patent Laid-Open No. 60-90
No. 017 proposes that the inner cross-sectional area of the housing is gradually reduced along the fluid flow direction to prevent a decrease in the polymer flow velocity at the interface with the housing in the downstream portion of the filter. This method is effective in reducing stagnation at the boundary surface with the housing at the downstream portion of the filter, but is less effective at suppressing stagnation at the boundary surface between the bottom leaf disk filter and the flange. In addition, there is a problem that extraction and disassembly work of the filter set becomes complicated.
【０００５】またハウジング壁面及び壁面近傍を流れる
ポリマー流速が遅く、そのため滞留劣化した流体と、流
速が早く熱劣化していない正常な流体が混合してフイル
ターを通過し、その結果品質の低下した流体が濾過され
ることを回避する方法として、特開昭５９−５５３２２
号で、多孔質構造体の軸心の位置をハウジングの軸心の
位置から偏心させて配置することによって、正常な流体
を選択的に濾過し、熱劣化した流体を特定位置に集中さ
せて、この集中点で熱劣化した流体を系外に排出するこ
とが提案されている。この方法は熱劣化した流体は系外
に排出し、正常な流体のみを選択的に濾過することを前
提にしており、経済的なロスは避け難い。Further, the flow velocity of the polymer flowing in the wall surface of the housing and in the vicinity of the wall surface is slow, so that the fluid deteriorated in retention and the normal fluid having a high flow velocity and not thermally deteriorated are mixed and passed through the filter, resulting in a fluid of deteriorated quality. As a method for avoiding the filtration of the water, JP-A-59-55322
By arranging the axial center position of the porous structure eccentric from the axial center position of the housing, the normal fluid is selectively filtered, and the heat-deteriorated fluid is concentrated at a specific position. It has been proposed to discharge the fluid thermally deteriorated at this concentration point to the outside of the system. This method is based on the premise that the heat-deteriorated fluid is discharged to the outside of the system and only the normal fluid is selectively filtered, and economic loss is unavoidable.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は、従来
の濾過装置の問題を解消し、多段に積層したフイルター
とハウジング或はフランジとの境界部に生じるポリマー
の滞留を防止してゲル化ポリマーの発生を抑制し、かつ
各フイルターにほぼ等量の濾過負荷を与えるようにし
て、フイルターの濾過寿命を延長する濾過装置を提供す
ることにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the conventional filtration device and prevent the polymer from staying at the boundary between the multi-layered filter and the housing or the flange to form a gel. It is an object of the present invention to provide a filtration device that suppresses the generation of polymer and applies a substantially equal amount of filtration load to each filter to extend the filtration life of the filter.
【０００７】[0007]
【課題を解決するための手段】本発明は、ハウジング内
に、複数のリーフディスクフイルターを、ポリマー流路
を有するセンターシャフトに通して積重ねて収納し、該
ハウジングに導入した溶融ポリマーをリーフディスクフ
イルターを通過させ、センターシャフトのポリマー流路
に移動させることによって濾過する溶融ポリマーの濾過
装置に於て、前記センターシャフトのポリマー流路の下
流部断面積を、上流部断面積の１.１倍以上に拡大して
いることを特徴とする溶融ポリマーの濾過装置である。SUMMARY OF THE INVENTION According to the present invention, a plurality of leaf disk filters are housed in a housing by stacking them through a center shaft having a polymer flow path, and the molten polymer introduced into the housing is stored in the leaf disk filters. In a device for filtering a molten polymer, which is filtered by moving the polymer passage through the center shaft to the polymer passage of the center shaft, the downstream cross-sectional area of the polymer passage of the center shaft is 1.1 times or more of the upstream cross-sectional area. It is an apparatus for filtering molten polymer, which is characterized by being expanded to.
【０００８】以下、図面を用いて本比発明を説明する。The present invention will be described below with reference to the drawings.
【０００９】図１は本発明の濾過装置の一つの実施態様
を示す概略図である。１はハウジング、２は溶融ポリマ
ー、３はリーフディスクフイルター、４は濾材、５はフ
イルター３内のポリマー流路（フイルター二次側）、６
はセンターシャフト、７はセンターシャフト６内のポリ
マー流路、８は濾過装置のポリマー流路終端、９はフラ
ンジ、１０はハウジング内のポリマー流路（フイルター
一次側）、１１、１２は滞留ポリマー、２０はフイルタ
ーセットの最下段フイルター、である。FIG. 1 is a schematic view showing one embodiment of the filtration device of the present invention. 1 is a housing, 2 is a molten polymer, 3 is a leaf disc filter, 4 is a filter medium, 5 is a polymer flow path in the filter 3 (secondary side of the filter), 6
Is a center shaft, 7 is a polymer flow channel in the center shaft 6, 8 is a polymer flow channel end of a filtering device, 9 is a flange, 10 is a polymer flow channel in the housing (primary side of the filter), 11 and 12 are stagnant polymers, 20 is a lowermost filter of the filter set.
【００１０】本発明においてリーフディスクフイルター
３は、濾材が金属粉末焼結体、金属繊維の不織布状焼結
体、またはセラミック粉末等の焼結体で、要すれば濾材
の補強材を介し、二枚の濾材を重ね、フイルター二次側
のポリマー流路５を形成する支持体を内包して積層さ
れ、中央に中空のシャフトを通すハブリングを有する。In the present invention, the leaf disc filter 3 has a filter medium made of a metal powder sintered body, a non-woven fabric sintered body of metal fibers, or a sintered body of ceramic powder or the like. A plurality of filter media are layered on top of each other and laminated with a support that forms the polymer flow path 5 on the secondary side of the filter being included, and a hub ring through which a hollow shaft is passed in the center.
【００１１】本発明においてセンターシャフト６は、図
１のように中央に中空のポリマー流路を有するシャフ
ト、或はシャフトの外表面に上流から下流に至る溝を有
し、該溝を流路とするシャフト（ただし、溝の最下端は
シャフト下端内のポリマー流路に通じている）など、リ
ーフディスクフイルターを支持し、該フイルターを通過
したポリマーを系外に導く流路を有する構造体であっ
て、該シャフトの流路断面積は、例えばポリマーを移送
する流路が複数の場合は、それらの複数の流路の合計し
た断面積において、下流部が上流部の１.１倍以上に拡
大していること、好ましくは１.５倍以上、更に好まし
くは２倍以上に拡大している場合がよい。この上限は１
００倍、さらには５０倍とするのが好ましい。In the present invention, the center shaft 6 has a hollow polymer passage in the center as shown in FIG. 1, or has a groove from the upstream to the downstream on the outer surface of the shaft. A structure having a flow path that supports a leaf disc filter such as a shaft (however, the lowermost end of the groove communicates with the polymer flow path inside the lower end of the shaft) and guides the polymer passing through the filter to the outside of the system. Thus, for example, in the case where there are a plurality of flow passages for transporting the polymer, the downstream cross-sectional area of the shaft is 1.1 times or more that of the upstream portion in the total cross-sectional area of the plurality of flow passages. That is, it is preferably 1.5 times or more, and more preferably 2 times or more. This upper limit is 1
It is preferably 00 times, more preferably 50 times.
【００１２】このように、センターシャフトのポリマー
流路断面積を、上流から下流に向って拡大することによ
って、ハウジング内のフイルター一次側に於けるポリマ
ー流による圧力分布と、センターシャフト内のポリマー
流による圧力分布を、都合良くバランスさせることが出
来る。その結果各リーフディスクフイルターにほぼ等し
い濾過負荷が掛るようになって、フイルター下段部での
ハウジングとの境界部、及び最下段のフイルターとフラ
ンジの境界面にも適度のポリマーの流れを生じて、滞留
が抑制されると共に、フイルターの濾過寿命も延長され
る。As described above, by expanding the cross-sectional area of the polymer passage of the center shaft from the upstream side to the downstream side, the pressure distribution due to the polymer flow on the primary side of the filter in the housing and the polymer flow in the center shaft. The pressure distribution due to can be conveniently balanced. As a result, almost equal filtration load is applied to each leaf disc filter, and an appropriate polymer flow is generated also in the boundary part with the housing in the lower part of the filter and the boundary surface of the lowermost filter and the flange. The retention is suppressed and the filtration life of the filter is extended.
【００１３】センターシャフトの下流部の流路断面積が
上流部の１.１倍に満たない場合は、本滞留防止の効果
が望めない。またシャフトに積重ねるリーフディスクフ
イルターの数量にもよるが、下流部の流路断面積が上流
部の１００倍を越える場合には、ハウジング内のポリマ
ーの流速分布が大幅に変化して、従来とは異なる部分に
新たな滞留部分を生じて、ゲルの発生を助長し、好まし
くない。If the flow passage cross-sectional area of the downstream portion of the center shaft is less than 1.1 times that of the upstream portion, the effect of preventing the retention cannot be expected. Also, depending on the number of leaf disc filters stacked on the shaft, when the flow passage cross-sectional area in the downstream portion exceeds 100 times that in the upstream portion, the flow velocity distribution of the polymer in the housing changes drastically. Creates a new retention part in a different part and promotes the generation of gel, which is not preferable.
【００１４】本発明の濾過装置は、上述した構造のセン
ターシャフトを用いることに特徴があり、その他の構造
は従来から知られ、または用いられている構造とするこ
とができる。例えば、前記した特許公報や、実用新案公
報に記載の改良手段を施した構造とすることができる。The filtering device of the present invention is characterized by using the center shaft having the above-described structure, and other structures can be the structures known or used conventionally. For example, it is possible to adopt a structure provided with the improvement means described in the above-mentioned patent publications or utility model publications.
【００１５】以下、本発明の濾過装置の使用例を図１で
説明すると、ハウジング１に導入した溶融ポリマー２
は、各リーフディスクフイルター３に分流して濾材４を
通過し濾過され、フイルター二次側の流路５を通ってセ
ンターシャフト６のポリマー流路７に入り、該流路７を
移動する過程でそれぞれのリーフディスクフイルターで
濾過されたポリマーと合流を重ねて濾過装置の終端８に
至る。An example of the use of the filtration device of the present invention will be described below with reference to FIG.
Is branched into each leaf disc filter 3, passes through the filter medium 4, is filtered, passes through the flow passage 5 on the secondary side of the filter, enters the polymer flow passage 7 of the center shaft 6, and moves in the flow passage 7. The polymer filtered by each leaf disc filter is combined with the polymer to reach the end 8 of the filtration device.
【００１６】各リーフディスクフイルター３を通過する
ポリマーの流量は、通常濾過装置の入口から終端に至る
間の各々の流路の圧力損失に逆比例し、フイルターセッ
トの最下段３ｎのリーフディスクフイルターは、隣合う
面がフランジ９のような遮断面であるため一般にポリマ
ーの滞留１１、１２を生じやすい。本発明の濾過装置
は、前記したように、センターシャフトの流路７の断面
積を、上流部から下流部方向に拡大しているから、ハウ
ジング内のフイルター一次側１０に於けるポリマーの圧
力分布と、センターシャフト内７のポリマーの圧力分布
を、都合良くバランスさせることができる。その結果各
フイルターにほぼ等しい濾過負荷が掛るようになって、
フイルター下流部でのハウジングとの境界部、及び最下
段のフイルターとフランジの境界面にも適度のポリマー
の流れを生じ、滞留が防止される。The flow rate of the polymer passing through each leaf disc filter 3 is usually inversely proportional to the pressure loss of each flow passage from the inlet to the end of the filtration device, and the leaf disc filter at the lowermost stage 3n of the filter set is Since the adjacent surfaces are blocking surfaces such as the flange 9, polymer retentions 11 and 12 are generally likely to occur. As described above, in the filtration device of the present invention, the cross-sectional area of the flow path 7 of the center shaft is expanded from the upstream portion to the downstream portion, so that the pressure distribution of the polymer on the primary side 10 of the filter in the housing is distributed. Thus, the pressure distribution of the polymer in the center shaft 7 can be conveniently balanced. As a result, each filter is loaded with almost the same filtration load,
An appropriate amount of polymer flow also occurs at the boundary between the housing and the downstream portion of the filter, and also at the boundary surface between the lowermost filter and the flange, which prevents stagnation.
【００１７】前記ポリマーとしては、例えばポリプロピ
レンのようなポリオレフィン、ナイロンのようなポリア
ミド、ポリエチレンテレフタレート、ポリエチレン−
２，６−ナフタレートのようなポリエステル、ポリカー
ボネート等の熱可塑性ポリマーが挙げられる。これらの
中、ポリエステルが好ましい。Examples of the polymer include polyolefin such as polypropylene, polyamide such as nylon, polyethylene terephthalate, polyethylene-
Examples include polyesters such as 2,6-naphthalate and thermoplastic polymers such as polycarbonate. Of these, polyester is preferred.
【００１８】[0018]
【実施例】以下、本発明を実施例によって具体的に説明
する。The present invention will be specifically described below with reference to examples.
【００１９】〔実施例１〕ステンレス粒子を焼結して成
る、濾過精度が１３μｍ、外径３０５ｍｍのリーフディ
スクフイルターを、図１に示す濾過装置のセンターシャ
フトに８０枚積層してハウジングに収納した。該センタ
ーシャフトの流路断面積は、下流部が上流部の３倍に拡
大している。[Example 1] Eighty leaf disc filters having a filtration accuracy of 13 µm and an outer diameter of 305 mm formed by sintering stainless particles were laminated on the center shaft of the filtration device shown in Fig. 1 and housed in a housing. . The flow passage cross-sectional area of the center shaft is three times larger in the downstream portion than in the upstream portion.
【００２０】ポリエチレンテレフタレートを約３０５℃
に溶融し、前記濾過装置を通した後ダイからシート状に
押出したが、１０日後でもポリマー劣化に起因するゲル
の発生はなかった。この溶融押出しを停止し、冷却した
後、濾過装置のフランジを撤去し、ポリマーの充満した
フイルターセットをハウジングから抜き去って、最下段
のフイルターとフランジの境界面、及びフイルター下段
部でのハウジングとの境界部を観察したところ、ポリマ
ー劣化による着色は軽微であった。Polyethylene terephthalate at about 305 ° C.
It was melted in a glass plate and passed through the filtration device, and then extruded into a sheet from a die, but no gel was generated due to polymer deterioration even after 10 days. After stopping this melt extrusion and cooling, the flange of the filtration device is removed, the polymer-filled filter set is removed from the housing, and the interface between the lowermost filter and the flange and the housing at the lower part of the filter are removed. Observation of the boundary portion of No. 2 showed that coloring due to polymer deterioration was slight.
【００２１】〔比較例１〕センターシャフトの流路断面
積を上流部と下流部とで同じにした以外は、実施例１と
同様にして押出した。その結果、押出し開始７日目にポ
リマー劣化のゲルに起因する欠点を生じた。フイルター
セットの最下段のフイルターとフランジの境界面、及び
フイルター下段部でのハウジングとの境界部は、ポリマ
ー劣化による着色が顕著であった。[Comparative Example 1] Extrusion was carried out in the same manner as in Example 1 except that the flow path cross-sectional area of the center shaft was the same in the upstream portion and the downstream portion. As a result, on the 7th day from the start of extrusion, a defect caused by a polymer-degraded gel was generated. The boundary between the lowermost filter and the flange of the filter set and the housing at the lower part of the filter was markedly colored due to polymer deterioration.
【００２２】〔実施例２〕ステンレス繊維を不織布状に
焼結して成る、濾過精度が５μｍ、外径３０５ｍｍのリ
ーフディスクフイルターを、図１に示す濾過装置のセン
ターシャフトに７０枚積層してハウジングに収納した。
該センターシャフトの流路断面積は、下流部が上流部の
５倍に拡大している。[Example 2] Seventy leaf-disk filters having a filtration accuracy of 5 µm and an outer diameter of 305 mm, which were made by sintering stainless fibers into a non-woven fabric, were laminated on the center shaft of the filtration apparatus shown in Fig. 1 to form a housing. Stored in.
The flow path cross-sectional area of the center shaft has a downstream portion that is five times larger than the upstream portion.
【００２３】ポリエチレン−２，６−ナタレートを約３
１３℃に溶融し、前記濾過装置を通して濾過した後シー
ト状に押出したが、８日後でもポリマー劣化によるゲル
の発生はなかった。About 3 parts of polyethylene-2,6-naphthalate
It was melted at 13 ° C., filtered through the filtration device and extruded into a sheet, but no gel was formed due to polymer deterioration even after 8 days.
【００２４】〔比較例２〕センターシャフトの流路断面
積が上流部と下流部とで同じにした以外、実施例２と同
様にして押出した。その結果、押出し開始６日目にポリ
マー劣化のゲルに起因する欠点を生じた。[Comparative Example 2] Extrusion was performed in the same manner as in Example 2 except that the flow path cross-sectional area of the center shaft was the same in the upstream portion and the downstream portion. As a result, on the 6th day from the start of extrusion, a defect caused by the polymer-degraded gel was generated.
【００２５】[0025]
【発明の効果】本発明によれば、ハウジング内の溶融ポ
リマーの流速分布を小さくし、滞留によるポリマー熱劣
化を回避して、ゲル化ポリマーの生成を抑制する濾過装
置を提供することができる。According to the present invention, it is possible to provide a filtration device in which the flow velocity distribution of the molten polymer in the housing is narrowed, thermal deterioration of the polymer due to retention is avoided, and the formation of gelled polymer is suppressed.
【図１】図１は本発明の濾過装置の一つの態様を示す概
略図である。FIG. 1 is a schematic view showing one embodiment of a filtration device of the present invention.
１：ハウジング ２：溶融ポリマー ３：リーフディスクフイルター ４：濾材 ５：フイルター３内のポリマー流路（フイルター二次
側） ６：センターシャフト ７：センターシャフト６内のポリマー流路 ８：濾過装置のポリマー流路終端 ９：フランジ １０：ハウジング内のポリマー流路（フイルター一次
側） １１、１２：滞留ポリマー ３ｎ：フイルターセットの最下段フイルター1: Housing 2: Molten Polymer 3: Leaf Disc Filter 4: Filter Material 5: Polymer Channel in Filter 3 (Secondary Side of Filter) 6: Center Shaft 7: Polymer Channel in Center Shaft 8: Polymer of Filter Device Flow path end 9: Flange 10: Polymer flow path in housing (primary side of filter) 11, 12: Retained polymer 3n: Bottom stage filter of filter set
Claims (1)
フイルターを、ポリマー流路を有するセンターシャフト
に通して積重ねて収納し、該ハウジングに導入した溶融
ポリマーを該リーフディスクフイルターを通過させ、セ
ンターシャフトのポリマー流路に移動させることによっ
て濾過する溶融ポリマーの濾過装置に於て、前記センタ
ーシャフトのポリマー流路の下流部断面積を、上流部断
面積の１.１倍以上に拡大していることを特徴とする溶
融ポリマーの濾過装置。1. A plurality of leaf disc filters are housed in a housing by stacking them through a center shaft having a polymer flow path, and the molten polymer introduced into the housing is passed through the leaf disc filters, In a molten polymer filtration device that filters by moving to a polymer channel, the cross-sectional area of the downstream portion of the polymer channel of the center shaft is expanded to be 1.1 times or more of the cross-sectional area of the upstream portion. Characterized molten polymer filtration device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7283045A JPH09122408A (en) | 1995-10-31 | 1995-10-31 | Filter device for molten polymer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7283045A JPH09122408A (en) | 1995-10-31 | 1995-10-31 | Filter device for molten polymer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09122408A true JPH09122408A (en) | 1997-05-13 |
Family
ID=17660504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7283045A Pending JPH09122408A (en) | 1995-10-31 | 1995-10-31 | Filter device for molten polymer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09122408A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001000298A1 (en) * | 1999-06-30 | 2001-01-04 | Teijin Limited | Filter device for polycarbonate and production method for polycarbonate |
| JP2008519675A (en) * | 2004-11-15 | 2008-06-12 | アトミック エナジー オブ カナダ リミテッド | Fin strainer |
| JP2010125364A (en) * | 2008-11-26 | 2010-06-10 | Okura Ind Co Ltd | Disc filter device |
| KR20170113680A (en) * | 2009-06-23 | 2017-10-12 | 아토믹 에너지 오브 캐나다 리미티드 | Vaned filtering element |
-
1995
- 1995-10-31 JP JP7283045A patent/JPH09122408A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001000298A1 (en) * | 1999-06-30 | 2001-01-04 | Teijin Limited | Filter device for polycarbonate and production method for polycarbonate |
| US6471877B1 (en) | 1999-06-30 | 2002-10-29 | Teijin Limited | Filter device for polycarbonate and production method for polycarbonate |
| JP2008519675A (en) * | 2004-11-15 | 2008-06-12 | アトミック エナジー オブ カナダ リミテッド | Fin strainer |
| US9672947B2 (en) | 2004-11-15 | 2017-06-06 | Atomic Energy Of Canada Limited | Finned strainer |
| US11361870B2 (en) | 2004-11-15 | 2022-06-14 | Atomic Energy Of Canada Limited | Finned strainer |
| JP2010125364A (en) * | 2008-11-26 | 2010-06-10 | Okura Ind Co Ltd | Disc filter device |
| KR20170113680A (en) * | 2009-06-23 | 2017-10-12 | 아토믹 에너지 오브 캐나다 리미티드 | Vaned filtering element |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4631130A (en) | Plasma separator | |
| KR100846647B1 (en) | Spiral separation membrane element | |
| EP0227832B1 (en) | Composite hollow yarn and a process for producing the same | |
| JP2019504786A (en) | Extruded parts for honeycomb bodies | |
| JPH09122408A (en) | Filter device for molten polymer | |
| JP3150275B2 (en) | Porous monolithic support for filtration membrane | |
| JP6007492B2 (en) | Leaf disk filter assembly and polymer film manufacturing method | |
| US6641728B2 (en) | Device for filtering a liquid, particularly for filtering a polymer plastic melt | |
| JP3279877B2 (en) | Filtration method of thermoplastic polymer | |
| JP2728549B2 (en) | Method for producing composite hollow fiber | |
| US5089187A (en) | Process for producing a semi-permeable membrane by extrusion | |
| JPH09150018A (en) | Filtration method for thermoplastic polymer | |
| JP2009154301A (en) | Filtration apparatus for molten resin, and method for manufacturing optical film | |
| JPH0796152A (en) | Gradient hollow-fiber membrane and its production | |
| JP2015016400A (en) | Hollow fiber membrane and hollow fiber membrane module for deaeration | |
| CN219191226U (en) | BOPET melt filter | |
| JP2012213983A (en) | Polymer filter, extrusion device, method for manufacturing extrusion molding and method for manufacturing optical film | |
| JP2008018598A (en) | Polymer filter and method for extrusion molding of molten resin | |
| JP2002283344A (en) | Molten polymer filtering device and filtering method | |
| JPS6375116A (en) | Production of conjugated hollow yarn membrane | |
| JPH11156125A (en) | Depth type filter | |
| JP6701822B2 (en) | Melt spinning pack | |
| JP7225761B2 (en) | metal filtration filter | |
| JP2002307529A (en) | Filter for molten resin and method for manufacturing resin moldings | |
| JPH03274132A (en) | Method and apparatus for starting operation of thermoplastic resin molding apparatus |