JPH08103952A - Manufacture of polyethylene resin tubular film containing no gel-state material and/or foreign matter - Google Patents
Manufacture of polyethylene resin tubular film containing no gel-state material and/or foreign matterInfo
- Publication number
- JPH08103952A JPH08103952A JP6260972A JP26097294A JPH08103952A JP H08103952 A JPH08103952 A JP H08103952A JP 6260972 A JP6260972 A JP 6260972A JP 26097294 A JP26097294 A JP 26097294A JP H08103952 A JPH08103952 A JP H08103952A
- Authority
- JP
- Japan
- Prior art keywords
- polyethylene
- gel
- tubular film
- foreign matter
- molten
- 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.)
- Granted
Links
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はゲル状物及び（又は）異
物を含まないポリエチレン系樹脂チューブラーフィルム
の製造方法及びその製造装置に関する。このように製造
されたポリエチレン系樹脂チューブラーフィルムはゲル
状物及び（又は）異物を含まないので高品質であり、食
料品、果物、野菜、花卉、魚貝類、穀物、衣料品、機
械、電子部品、薬品、プラスチック、化成品、肥料等の
各種物品の包装資材として利用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a polyethylene resin tubular film containing no gel and / or foreign matter. The polyethylene resin tubular film produced in this way is of high quality because it does not contain gels and / or foreign substances, and it is a food product, fruit, vegetable, flower, fish, shellfish, grain, clothing, machine, electronic It is used as a packaging material for various products such as parts, chemicals, plastics, chemical products and fertilizers.
【０００２】[0002]
【従来の技術】従来、ポリエチレン系樹脂を押出機中で
溶融混練し、次いで、環状ダイから溶融状態のチューブ
ラーフィルムとして押出し、空気又は水で冷却し、固化
したチューブラーフィルムを得る方法は公知技術であ
り、広く行われている。しかしながら、原料のポリエチ
レン系樹脂の製造時に異常反応が起こった場合、架橋反
応が局部的に進行し、微量ながら、直径０．０１〜２ｍ
ｍの架橋体（これをゲル状物という）が生成する。この
架橋体は、ポリエチレン系樹脂の大部分が加熱により溶
融するにもかかわらず、溶融しないで環状ダイより押出
されるので、環状ダイの表面に付着し、チューブラーフ
ィルムの表面にすじをつけて不良品としたり、又はチュ
ーブラーフィルム中に入っていった場合には、フィシュ
アイとして不均一なフィルムとなり、不良品となる弊害
が生じる。一方、ポリエチレン系樹脂はポリエチレン系
樹脂の製造工程においてパイプ、貯蔵タンク、ポンプ、
空気、水等に接触したり、輸送用のコンテナー、紙袋等
に入れられ、加工工場でコンテナー、紙袋等からあけら
れ使用されるが、これらの場合において金属粉、無機物
粉、紙くず、糸くず、空気中のほこり等の異物が混入す
ることがあり、これらもゲル状物と同様に悪い作用を及
ぼし、チューブラーフィルムを不良品とする弊害が生じ
る。従来、これらのゲル状物及び（又は）異物がポリエ
チレン系樹脂中に混入しないようにするため、重合条件
を厳密にコントロールしたり、輸送工程、貯蔵工程で異
物が混入しないように、装置の製作時に残存する金属粉
を完全に除去したり、装置内面の浄化を十分に行った
り、コンテナー、紙袋等が呼吸することにより外部から
異物が入らない構造としたり、紙袋の開封時に紙からの
ファイバー、糸くず等が混入しないような形態としたり
する等、対策がとられてきたが、完全に混入を防止する
ことは困難であった。2. Description of the Related Art Conventionally, a method for obtaining a solidified tubular film by melt-kneading a polyethylene resin in an extruder, then extruding it as a tubular film in a molten state from an annular die and cooling with air or water is known. It is a technology and widely practiced. However, when an abnormal reaction occurs during the production of the raw material polyethylene-based resin, the crosslinking reaction locally proceeds, and the diameter is 0.01 to 2 m even though the amount is very small.
A cross-linked product of m (this is called a gel-like material) is produced. This cross-linked product is extruded from the annular die without melting, even though most of the polyethylene resin is melted by heating, so it adheres to the surface of the annular die and streaks on the surface of the tubular film. If it is a defective product or if it enters the tubular film, the film becomes a non-uniform film as a fish eye, resulting in an adverse effect of becoming a defective product. On the other hand, polyethylene-based resins are used for pipes, storage tanks, pumps,
Used in contact with air, water, etc., or put in containers for transportation, paper bags, etc. and opened from containers, paper bags, etc. in processing plants, but in these cases, metal powder, inorganic powder, paper waste, lint, Foreign matter such as dust in the air may be mixed in, and these also have the same bad effect as the gel-like material, resulting in an adverse effect of making the tubular film defective. Conventionally, in order to prevent these gel-like substances and / or foreign substances from mixing into the polyethylene resin, the polymerization conditions are strictly controlled, and the manufacturing of devices is performed so that foreign substances do not mix during the transportation and storage processes. Sometimes residual metal powder is completely removed, the inner surface of the device is thoroughly cleaned, foreign materials do not enter from the outside by breathing containers, paper bags, etc., and fibers from paper when opening the paper bag, Although measures have been taken such as a form in which lint and the like do not mix, it is difficult to completely prevent the mixing.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、ポリエチレ
ン系樹脂中にゲル状物及び（又は）異物が微量混入して
いても、これを完全に除去し、高品位のポリエチレン系
樹脂で作ったチューブラーフィルムが製造できる方法を
提供することを課題とする。According to the present invention, even if a minute amount of a gel-like substance and / or a foreign substance is mixed in a polyethylene resin, the polyethylene resin is completely removed and made of a high-quality polyethylene resin. An object of the present invention is to provide a method capable of producing a tubular film.
【０００４】[0004]
【課題を解決するための手段】本発明者等は、ポリエチ
レン系樹脂中のゲル状物及び異物を除去するため、まず
初めに、焼結体フィルターのみを使用して実験を行った
が、しかしこの方法はゲル状物及び異物は除去できた
が、焼結体フィルターにより大きな抵抗を生じ圧力損失
が甚だしく、電力消費の点でコストアップとなり、生産
性も低下し、実用的ではなかった。これを解決するた
め、一般に、高粘度流体輸送用としてよく知られている
ギヤーポンプを焼結体フィルターの前に設置することに
より圧力損失の補償を行わせればよいことに想到し、本
発明を完成させた。The present inventors first conducted an experiment using only a sintered filter in order to remove gel-like substances and foreign substances in a polyethylene resin, but This method was able to remove gels and foreign substances, but it was not practical because it caused a large resistance due to the sintered body filter, the pressure loss was serious, the power consumption was increased, and the productivity was lowered. In order to solve this, it is generally thought that it suffices to compensate for the pressure loss by installing a gear pump, which is well known for transporting high-viscosity fluids, in front of the sintered body filter, thus completing the present invention. Let
【０００５】[0005]
【発明の概要】すなわち、本発明は（１）ゲル状物及び
（又は）異物を含むポリエチレン系樹脂を１１５〜１９
０℃の温度で押出機より溶融状態で押出し、次いで高粘
度樹脂溶融体輸送用ギヤーポンプにより該溶融ポリエチ
レン系樹脂を焼結体フィルターに圧送し通過させて該ゲ
ル状物及び異物を除去し、次いで、環状ダイより該溶融
ポリエチレン系樹脂を１５０〜２２０℃の温度で押出し
溶融状のチューブラーフィルムとし、次いで冷却固化さ
せることを特徴とするゲル状物及び（又は）異物を含ま
ないポリエチレン系樹脂チューブラーフィルムの製造方
法、（２）上記の方法で製造したゲル状物及び（又は）
異物を含まないポリエチレン系樹脂チューブラーフィル
ム、及び（３）ポリエチレン系樹脂を溶融するための押
出機と、押出された溶融ポリエチレン系樹脂を圧送する
ための高粘度樹脂溶融体輸送用ギヤーポンプと、ギヤー
ポンプにより圧送された溶融ポリエチレン系樹脂を通過
させると共にゲル状物及び（又は）異物を除去するため
の焼結体フィルターと、溶融ポリエチレン系樹脂から溶
融状のチューブラーフィルムを押出すための環状ダイ
と、溶融状のチューブラーフィルムを冷却するための冷
却デバイスを順次に配置してなる、ゲル状物及び（又
は）異物を含まないポリエチレン系樹脂チューブラーフ
ィルムの製造装置に関する。SUMMARY OF THE INVENTION That is, the present invention provides (1) a polyethylene-based resin containing a gel-like material and / or a foreign material 115 to 19
It is extruded in a molten state from an extruder at a temperature of 0 ° C., then the molten polyethylene-based resin is pressure-fed to a sintered body filter by a gear pump for transporting a high-viscosity resin molten body to pass the molten polyethylene-based resin to remove the gel and foreign matters, and A polyethylene resin tube free from gel and / or foreign matter, characterized in that the molten polyethylene resin is extruded from an annular die at a temperature of 150 to 220 ° C. to form a molten tubular film, and then cooled and solidified. Method for producing a lar film, (2) a gel-like material produced by the above method and / or
A polyethylene-based resin tubular film containing no foreign matter, and (3) an extruder for melting the polyethylene-based resin, a gear pump for transporting the high-viscosity resin melt, and a gear pump for pumping the extruded molten polyethylene-based resin. A sintered body filter for passing the molten polyethylene-based resin that has been pressure-fed by the method and removing gel and / or foreign matter; and an annular die for extruding a molten tubular film from the molten polyethylene-based resin. The present invention relates to an apparatus for producing a polyethylene-based resin tubular film that does not contain a gel-like material and / or foreign matter, in which cooling devices for cooling a molten tubular film are sequentially arranged.
【０００６】[0006]
【発明の具体的な説明】本発明において、ゲル状物と
は、ポリエチレンの重合反応時に異常反応によって局部
的に架橋反応が進行し、直径０．０５〜２ｍｍの球状又
は回転楕円体状の熱によって溶融されず、かつ、押出機
中の加熱混錬によっても小さな粒子に分割されないポリ
エチレン架橋体をいう。このものは、インフレーション
フィルム中に残存した場合、魚の目（フィッシュアイ）
状にフィルムの内部又は表面に分散しており、光学的屈
折率がフィルム部分と異なって大きく、特に表面に存在
しているものは表面に球面として盛りあがっているの
で、フィルムの手ざわりや見かけを著しく悪くするの
で、除去する必要がある。DETAILED DESCRIPTION OF THE INVENTION In the present invention, a gel-like material means a spherical or spheroidal heat-reaction having a diameter of 0.05 to 2 mm due to a local crosslinking reaction caused by an abnormal reaction during the polymerization reaction of polyethylene. It is a cross-linked polyethylene that is not melted by heat and is not divided into small particles even by kneading in an extruder. If this remains in the blown film, it will be a fish eye.
Are dispersed in the film or on the surface of the film, and the optical refractive index is different from that of the film portion.In particular, those existing on the surface are raised as spherical surfaces on the surface, so that the texture and appearance of the film are remarkably increased. It makes it worse and needs to be removed.
【０００７】本発明において、異物とは、ポリエチレン
の製造工程、輸送工程等、例えばパイプ輸送ライン、貯
蔵タンク、輸送用フレキシブルコンテナー、輸送用アル
ミニウムコンテナー、輸送用紙袋、輸送用ポリエチレン
袋等に接触、充填、排出したりするとき、混入する直径
０．０１〜５ｍｍの金属、無機物、セラミックス、繊
維、紙等の粒子又は破片をいう。これがフィルムに入っ
ていくと表面に凹凸部を形成し、フィルムの光学的特性
を不均一とし、商品価値をなくするので除去する必要が
ある。In the present invention, the foreign matter comes into contact with a polyethylene manufacturing process, a transportation process, etc., such as a pipe transportation line, a storage tank, a transportation flexible container, a transportation aluminum container, a transportation paper bag, and a transportation polyethylene bag, Particles or fragments of metal, inorganic material, ceramics, fiber, paper, etc. having a diameter of 0.01 to 5 mm, which are mixed in when filling or discharging. As it enters the film, it forms irregularities on the surface, makes the optical characteristics of the film non-uniform, and loses its commercial value, so it must be removed.
【０００８】本発明において、ポリエチレン系樹脂と
は、高圧法低密度ポリエチレン、高密度ポリエチレン、
直鎖状低密度エチレン−α−オレフィン共重合体、超低
密度エチレン−α−オレフィン共重合体、エチレン−酢
酸ビニル共重合体、エチレン−エチルアクリレート共重
合体、アイオノマー等を意味する。In the present invention, the polyethylene-based resin means high-pressure low-density polyethylene, high-density polyethylene,
It means a linear low-density ethylene-α-olefin copolymer, an ultra-low-density ethylene-α-olefin copolymer, an ethylene-vinyl acetate copolymer, an ethylene-ethyl acrylate copolymer, an ionomer and the like.
【０００９】本発明において、ゲル状物及び異物を含む
ポリエチレン系樹脂は１１５〜１９０℃で押出機より押
出される。１１５℃未満では均一に流動できる粘度に溶
融できず、１９０℃以上では熱分解が一部で進行し、品
質を低下させるので望ましくない。In the present invention, the polyethylene resin containing gel and foreign matter is extruded from an extruder at 115 to 190 ° C. If it is less than 115 ° C, it cannot be melted to a viscosity that allows it to flow uniformly, and if it is 190 ° C or more, thermal decomposition partially proceeds and the quality deteriorates, which is not desirable.
【００１０】本発明において、高粘度樹脂溶融体輸送用
ギヤーポンプとは、ポンプ本体内に相互に外回りに回転
するギヤーが対設され、その周辺部に圧縮部（空間）が
設けられた構造となっており、従って押出機からくる高
粘度のポリエチレン溶融体を、脈動させることなく、高
圧で、高吐出量でかつ定量で次工程の焼結体フィルター
部門に押出すことができる装置であり、例えば、ＭＡＡ
Ｇ社のｅｘｐａｃ型、川崎重工社のＫＨＰ・ＢａＳ型、
ゼニスポンプ社のＨＬＢ型等として市販されている。こ
のギヤーポンプを使用しないと、ゲル状物や異物がつま
った焼結体フィルターの高い抵抗に対抗してダイよりポ
リエチレン系樹脂溶融体を押出すことが困難となり、低
生産性となり、工業的生産は不可能となる。In the present invention, a gear pump for transporting a high-viscosity resin melt has a structure in which gears that rotate outwards are oppositely provided in the pump body, and a compression portion (space) is provided in the peripheral portion. Therefore, it is a device capable of extruding a high-viscosity polyethylene melt coming from an extruder into the sintered body filter section of the next step at a high pressure, a high discharge rate, and a fixed amount without pulsation. , MAA
G's expac type, Kawasaki Heavy Industries' KHP / BaS type,
It is commercially available as HLB type manufactured by Zenith Pump Company. If this gear pump is not used, it will be difficult to extrude the polyethylene resin melt from the die against the high resistance of the sintered body filter clogged with gel and foreign matter, resulting in low productivity and industrial production. It will be impossible.
【００１１】本発明において、焼結体フィルターとは、
繊維径が１〜１００μの金属微細繊維からなる厚さ０．
１〜１０ｍｍの不織布を少なくとも一層有し、その片側
又は両側に金属メッシュ層があってもよく、不織布層と
金属メッシュ層は多層の組合せとなっていてもよく、不
織布のみ又は不織布と金属メッシュ層を合体させた後、
金属の融点前後の温度で一定時間維持することにより金
属繊維内で各接点間に原子拡散現象を起こさせ、接点間
をまたいで結晶を形成させ、完全に一体化する、いわゆ
る焼結により一体化させた耐熱、耐蝕性、耐圧性のフィ
ルターである。この金属不織布層、金属メッシュ層と、
多孔質の金属又はセラミックスの焼結体層を追加して用
いてもよい。このような焼結体フィルターとしては富士
フィルター（株）のＦＰＦシステムが市販されている。In the present invention, the sintered body filter means
The thickness of the fine metal fibers having a fiber diameter of 1 to 100 μ is 0.
At least one non-woven fabric having a thickness of 1 to 10 mm may be provided, and a metal mesh layer may be provided on one side or both sides thereof, and the non-woven fabric layer and the metal mesh layer may be a combination of multiple layers, only the non-woven fabric or the non-woven fabric and the metal mesh layer. After combining
By maintaining the temperature around the melting point of the metal for a certain period of time, atomic diffusion phenomenon occurs between the contacts in the metal fiber, crystals are formed across the contacts, and they are completely integrated, so-called sintering It is a heat-resistant, corrosion-resistant and pressure-resistant filter. With this metal nonwoven fabric layer, metal mesh layer,
A porous metal or ceramics sintered body layer may be additionally used. The FPF system of Fuji Filter Co., Ltd. is commercially available as such a sintered body filter.
【００１２】本発明において使用する押出機、環状ダ
イ、冷却装置等は、ポリエチレンチューブラーフィルム
の製造用として一般に使用されているものを採用すれば
よい。環状ダイとしては、米国ＤＡＶＩＳ社製等の低滞
留ダイが特に望ましい。The extruder, annular die, cooling device and the like used in the present invention may be those generally used for producing polyethylene tubular films. As the annular die, a low retention die manufactured by US DAVIS, etc. is particularly desirable.
【００１３】[0013]
【実施例】次に本発明を実施例に基づいて説明するが、
本発明はこれらに限定されるものではない。EXAMPLES The present invention will now be described based on examples.
The present invention is not limited to these.
【００１４】実施例１ 密度０．９２０ｇ／ｍｌ、メルトインデックス２．５ｇ
／１０分の高圧法低密度ポリエチレン１００重量部（日
本ユニカー製、ベースレジン）にヒンダードフェノール
系酸化防止剤（チバガイギー社製、Ｉｒｇａｎｏｘ１０
１０）０．０５重量部、リン系酸化防止剤（サンド社
製、Ｓａｎｄｓｔａｂ ＰＥＰＱ）０．０５重量部、ス
リップ剤０．１重量部（エルカ酸アミド０．０７重量
部、ステアリン酸アミド０．０３重量部）をバンバリミ
キサーにより１６０℃で１０分間混錬した後、造粒機に
より直径３ｍｍ、長さ３ｍｍの円柱状ペレットを作っ
た。次に、φ４０ｍｍ、Ｌ／Ｄ ２５の押出機（株式会
社プラコー製）に供給し、シリンダー供給部１２０℃、
圧縮部１３０℃、計量部１７０℃、吐出量３０ｋｇ／時
間で押出し、次に高粘度樹脂溶融体輸送用ギヤーポンプ
（ＭＡＡＧ社製、ｅｘｐａｃ型ポンプサイズ７０／４
５）に供給し、ポンプ回転数１５ｒｐｍ、吸入圧１５０
ｂａｒ、吐出圧３１０ｂａｒとして運転し、次いで、ス
テンレス針金からなる保護メッシュ層／粗いステンレス
ファイバー層／密なるステンレスファイバー層／ステン
レス針金からなる支持メッシュ層を同時に焼結して完全
に一体化したリーフディスクタイプ金属繊維焼結体フィ
ルター要素（富士フィルター工業製、商品名フジメタル
ファイバーフィルターエレメントＦＡ−２５）を３段に
重ね、これをケースの中に入れたフィルター装置にギヤ
ーポンプからの溶融樹脂を導入し、ゲル状物を除去し、
次いで、φ７５ｍｍのダイ（ダイギャップ＝１．０ｍｍ
押出し温度＝１５０〜１７０℃、モダンマシナリー社
製）より１６０℃で押出し、エアーリングで空冷し、膨
張比２．０、フロストライン２００ｍｍで厚さ３０μｍ
のインフレーションフィルムを得た。評 価 （１）加工性：良好。バブル安定性があり、膜厚精度が
一定である。 （２）曇り度（ＡＳＴＭ Ｄ１００３に準拠）：２．９
％（非常に良好）。 （３）ＦＡＲ（フィルム外観、ＮＵＣ法に準拠：フィル
ム面積１．８ｍ2 中のフィッシュアイ又はレンズの数
（Ｘ）を測定し、（１００−Ｘ）をＦＡＲ値とする）：
８５（非常に良好）。Example 1 Density 0.920 g / ml, melt index 2.5 g
/ 10 min high pressure low density polyethylene 100 parts by weight (Nippon Unicar, base resin) with hindered phenolic antioxidant (Ciba Geigy, Irganox 10)
10) 0.05 parts by weight, phosphorus-based antioxidant (manufactured by Sand Co., Sandstab PEPQ) 0.05 parts by weight, slip agent 0.1 parts by weight (erucic acid amide 0.07 part by weight, stearic acid amide 0.03) (Part by weight) was kneaded with a Banbury mixer at 160 ° C. for 10 minutes, and then a columnar pellet having a diameter of 3 mm and a length of 3 mm was produced by a granulator. Next, it is supplied to an extruder (made by Placo Co., Ltd.) having a diameter of 40 mm and an L / D of 25, and a cylinder supply unit 120 ° C.
Extrusion with a compression unit of 130 ° C., a measuring unit of 170 ° C., and a discharge rate of 30 kg / hour, and then a gear pump for transporting a high-viscosity resin melt (manufactured by MAAG, expac type pump size 70/4).
5), pump speed 15 rpm, suction pressure 150
operating at a bar and discharge pressure of 310 bar, and then a protective metal mesh layer made of stainless wire / a coarse stainless fiber layer / a dense stainless fiber layer / a supporting mesh layer made of stainless wire is sintered at the same time to form a completely integrated leaf disk. Type metal fiber sintered body filter element (Fuji Filter Industry, product name Fuji Metal Fiber Filter Element FA-25) is stacked in three stages, and the molten resin from the gear pump is introduced into the filter device that is placed in the case. , Remove the gel,
Next, a φ75 mm die (die gap = 1.0 mm
Extrusion temperature = 150 to 170 ° C., extruded at 160 ° C. from Modern Machinery Co., Ltd., air-cooled with an air ring, expansion ratio 2.0, frost line 200 mm, thickness 30 μm.
Inflation film was obtained. Evaluation (1) Workability: Good. It has bubble stability and constant film thickness accuracy. (2) Haze (according to ASTM D1003): 2.9
% (Very good). (3) FAR (film appearance, conforming to NUC method: the number (X) of fish eyes or lenses in a film area of 1.8 m 2 is measured, and (100-X) is taken as a FAR value):
85 (very good).
【００１５】比較例１ 実施例１の高圧法低密度ポリエチレンを使って、ギヤー
ポンプを使用しなかった以外は、実施例１と同様な実験
を行ったところ、時間の経過とともに焼結体フィルター
にゲル状物が蓄積し目づまりを起こし、流通量が減少し
ていき、押出機のシャフトの回転トルクが増大していっ
た。Comparative Example 1 The same experiment as in Example 1 was carried out except that the high-pressure low-density polyethylene of Example 1 was used and no gear pump was used. The particles accumulated and clogged, the flow rate decreased, and the rotational torque of the shaft of the extruder increased.
【００１６】比較例２ 実施例１の高圧法低密度ポリエチレンを使って、焼結体
フィルターを使用しなかった以外は、実施例１と同様な
実験を行ったところ、ゲル状物がそのままフィルム中に
入っていったのでＦＡＲが１０〜２０となり、フィルム
としては商品価値は全くなかった。Comparative Example 2 The same experiment as in Example 1 was carried out except that the high-pressure low-density polyethylene of Example 1 was used and no sintered body filter was used. Since it entered, FAR became 10-20, and there was no commercial value as a film.
【００１７】実施例２ 密度０．９２３ｇ／ｍｌ、メルトインデックス０．８ｇ
／１０分の直鎖状低密度エチレン−ブテン−１共重合体
（日本ユニカー製、ユニポール法によるベースレジン）
１００重量部に、ヒンダードフェノール系酸化防止剤
（実施例１と同じ）０．０５重量部、リン系酸化防止剤
（実施例１と同じ）０．０５重量部、スリップ剤（実施
例１と同じ）０．１重量部をバンバリミキサーにより１
８０℃で１０分間混錬した後、造粒機により直径３ｍ
ｍ、長さ３ｍｍの円柱状ペレットを得た。次に、実施例
１と同様な押出機、ギヤーポンプ、焼結体フィルター、
環状ダイ冷却装置でチューブラーフィルムを作った。評 価 （１）加工性：良好。バブル安定性があり、膜厚精度が
一定である。 （２）曇り度：１２．８ （３）ＦＡＲ：８２（非常に良好）Example 2 Density 0.923 g / ml, melt index 0.8 g
/ 10 min linear low density ethylene-butene-1 copolymer (manufactured by Nippon Unicar, base resin by Unipol method)
In 100 parts by weight, 0.05 part by weight of a hindered phenol antioxidant (same as in Example 1), 0.05 part by weight of phosphorus antioxidant (same as in Example 1), and slip agent (as in Example 1) Same) 0.1 part by weight with Banbury mixer
After kneading at 80 ° C for 10 minutes, use a granulator to obtain a diameter of 3 m
A cylindrical pellet with m and a length of 3 mm was obtained. Next, the same extruder, gear pump, sintered filter as in Example 1
A tubular film was made with an annular die cooler. Evaluation (1) Workability: Good. It has bubble stability and constant film thickness accuracy. (2) Haze: 12.8 (3) FAR: 82 (very good)
【００１８】比較例３ 実施例２においてギヤーポンプを作用しなかった以外は
実施例２と同様な実験を行ったところ、時間の経過とと
もに、焼結体フィルターにゲル状物が蓄積し、目づまり
を起こし、流通量が減少していき、押出機のシャフトの
回転トルクが増大していった。Comparative Example 3 The same experiment as in Example 2 was carried out except that the gear pump was not operated in Example 2. As a result, a gel-like material was accumulated on the sintered filter with the passage of time, causing clogging. Then, the circulation amount decreased and the rotation torque of the extruder shaft increased.
【００１９】比較例４ 実施例２において、焼結体フィルターを使用しなかった
以外は実施例２と同様な実験を行ったところ、ＦＡＲが
−１０〜２０となり、フィルムとしては商品価値は全く
なかった。Comparative Example 4 The same experiment as in Example 2 was carried out except that the sintered body filter was not used in Example 2. As a result, the FAR was -10 to 20, and the film had no commercial value. It was
【００２０】[0020]
【発明の効果】本発明の方法によれば、ポリエチレン系
樹脂中に５μ以上のゲル状物及び（又は）異物が存在し
ていても、これらは高密度に重ねられた極細金属繊維焼
結体フィルターにより捕捉され、ポリエチレン系樹脂は
きれいにされ、フィルムとなるので、フィッシュアイや
レンズがなく、表面にすじや傷のない良好な品質のフィ
ルムが得られる。しかも、焼結体フィルターのみである
と、捕捉されたゲル状物及び（又は）異物によりフィル
ターの目づまりを起こし、ポリエチレン系樹脂の流通が
非常に困難となるが、ギヤーポンプを配置しているの
で、フィルター部の抵抗に抗して、一定量で多量の溶融
ポリエチレンを流通させることができ、高品位のチュー
ブラーフィルムが生産性よく低コストで得ることができ
るという効果がある。EFFECTS OF THE INVENTION According to the method of the present invention, even if a gel-like substance and / or a foreign substance having a size of 5 μm or more are present in the polyethylene-based resin, they are densely stacked ultrafine metal fiber sintered bodies. Since it is captured by the filter and the polyethylene resin is cleaned and becomes a film, it is possible to obtain a good quality film having no fish eyes or lenses and no streaks or scratches on the surface. Moreover, if it is only a sintered body filter, it causes clogging of the filter due to the trapped gel-like material and / or foreign matter, and it becomes very difficult for the polyethylene resin to flow, but since the gear pump is arranged, There is an effect that a large amount of molten polyethylene can be circulated in a fixed amount against the resistance of the filter portion, and a high-quality tubular film can be obtained with good productivity and at low cost.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｋ 23:00 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location B29K 23:00
Claims (3)
チレン系樹脂を１１５〜１９０℃の温度で押出機より溶
融状態で押出し、次いで高粘度樹脂溶融体輸送用ギヤー
ポンプにより該溶融ポリエチレン系樹脂を焼結体フィル
ターに圧送し通過させて該ゲル状物及び異物を除去し、
次いで、環状ダイより該溶融ポリエチレン系樹脂を１５
０〜２２０℃の温度で押出して溶融状のチューブラーフ
ィルムとし、次いでこれを冷却固化させることを特徴と
する、ゲル状物及び（又は）異物を含まないポリエチレ
ン系樹脂チューブラーフィルムの製造方法。1. A polyethylene resin containing a gel and / or a foreign substance is extruded in a molten state from an extruder at a temperature of 115 to 190 ° C., and then the molten polyethylene resin is removed by a gear pump for transporting a high-viscosity resin melt. The gel-like material and foreign matter are removed by pressure-feeding and passing through a sintered body filter,
Then, the molten polyethylene-based resin
A method for producing a polyethylene-based resin tubular film containing no gel and / or foreign matter, which comprises extruding at a temperature of 0 to 220 ° C. to form a molten tubular film and then cooling and solidifying the molten tubular film.
及び（又は）異物を含まないポリエチレン系樹脂チュー
ブラーフィルム。2. A polyethylene resin tubular film produced by the method according to claim 1, which is free of gel and / or foreign matter.
出機と、押出された溶融ポリエチレン系樹脂を圧送する
ための高粘度樹脂溶融体輸送用ギヤーポンプと、ギヤー
ポンプにより圧送された溶融ポリエチレン系樹脂を通過
させると共にゲル状物及び（又は）異物を除去するため
の焼結体フィルターと、溶融ポリエチレン系樹脂から溶
融状のチューブラーフィルムを押出すための環状ダイ
と、溶融状のチューブラーフィルムを冷却するための冷
却デバイスを順次に配置してなる、ゲル状物及び（又
は）異物を含まないポリエチレン系樹脂チューブラーフ
ィルムの製造装置。3. An extruder for melting a polyethylene-based resin, a gear pump for transporting a high-viscosity resin melt for pumping the extruded molten polyethylene-based resin, and a molten polyethylene-based resin pumped by a gear pump. And a sintered body filter for removing gel and / or foreign substances, an annular die for extruding a molten tubular film from a molten polyethylene resin, and cooling the molten tubular film An apparatus for producing a polyethylene-based resin tubular film containing no gel and / or foreign matter, in which cooling devices are sequentially arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26097294A JP3557256B2 (en) | 1994-10-03 | 1994-10-03 | Method for producing polyethylene-based resin tubular film containing no gel and / or foreign matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26097294A JP3557256B2 (en) | 1994-10-03 | 1994-10-03 | Method for producing polyethylene-based resin tubular film containing no gel and / or foreign matter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08103952A true JPH08103952A (en) | 1996-04-23 |
| JP3557256B2 JP3557256B2 (en) | 2004-08-25 |
Family
ID=17355315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26097294A Expired - Fee Related JP3557256B2 (en) | 1994-10-03 | 1994-10-03 | Method for producing polyethylene-based resin tubular film containing no gel and / or foreign matter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3557256B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010275415A (en) * | 2009-05-28 | 2010-12-09 | Tosoh Corp | Polyolefin resin composition film, sealing film for solar cell using the same, and solar cell using the same |
| WO2012063470A1 (en) * | 2010-11-12 | 2012-05-18 | 株式会社神戸製鋼所 | Gel reducing device and gel reducing method |
| JP2012101511A (en) * | 2010-11-12 | 2012-05-31 | Kobe Steel Ltd | Gel reducing device and gel reducing method |
| JP2013245297A (en) * | 2012-05-25 | 2013-12-09 | Kaneka Corp | Resin for hot melt adhesive film reduced in fish eye, method for producing the same, hot melt adhesive film composed of the resin, and laminated body containing the same |
| JP2014148622A (en) * | 2013-02-01 | 2014-08-21 | Kaneka Corp | Resin for hot-melt adhesive film having reduced fish eyes, method for producing the same, hot-melt adhesive film comprising resin, and laminate comprising the same |
-
1994
- 1994-10-03 JP JP26097294A patent/JP3557256B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010275415A (en) * | 2009-05-28 | 2010-12-09 | Tosoh Corp | Polyolefin resin composition film, sealing film for solar cell using the same, and solar cell using the same |
| WO2012063470A1 (en) * | 2010-11-12 | 2012-05-18 | 株式会社神戸製鋼所 | Gel reducing device and gel reducing method |
| JP2012101511A (en) * | 2010-11-12 | 2012-05-31 | Kobe Steel Ltd | Gel reducing device and gel reducing method |
| US11369927B2 (en) | 2010-11-12 | 2022-06-28 | Kobe Steel, Ltd. | Gel reduction method |
| JP2013245297A (en) * | 2012-05-25 | 2013-12-09 | Kaneka Corp | Resin for hot melt adhesive film reduced in fish eye, method for producing the same, hot melt adhesive film composed of the resin, and laminated body containing the same |
| JP2014148622A (en) * | 2013-02-01 | 2014-08-21 | Kaneka Corp | Resin for hot-melt adhesive film having reduced fish eyes, method for producing the same, hot-melt adhesive film comprising resin, and laminate comprising the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3557256B2 (en) | 2004-08-25 |
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