JPH081752A - Method for producing multilayer film - Google Patents
Method for producing multilayer filmInfo
- Publication number
- JPH081752A JPH081752A JP6144486A JP14448694A JPH081752A JP H081752 A JPH081752 A JP H081752A JP 6144486 A JP6144486 A JP 6144486A JP 14448694 A JP14448694 A JP 14448694A JP H081752 A JPH081752 A JP H081752A
- Authority
- JP
- Japan
- Prior art keywords
- multilayer film
- resin
- extruder
- multilayer
- feed block
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
- B29C48/37—Gear pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
- B29C48/387—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a gear pump
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
(57)【要約】
【目的】 スクリューピッチ状の波模様の発生を防止
し、多層フィルムの外観を向上させる。
【構成】 フィードブロックまたは多層マニフォール
ド金型と複数の押出機とを用いて多層フィルムを共押出
する多層フィルムの製造方法において、多層フィルムの
各層の樹脂を押出す押出機１、２のそれぞれの押出機
１、２とフィードブロック３または多層マニフォールド
金型との間にギアポンプ５、６を設け、押出スクリュー
の回転により生じる押出樹脂の脈動を押出樹脂がフィー
ドブロック３または多層マニフォールド金型に流入する
前に押出機１、２毎に個別に解消する多層フィルムの製
造方法。
(57) [Abstract] [Purpose] To prevent the generation of screw pitch wave patterns and improve the appearance of multilayer films. In a method for producing a multilayer film in which a multilayer film is co-extruded using a feed block or a multilayer manifold die and a plurality of extruders, each of the extruders 1 and 2 for extruding a resin of each layer of the multilayer film Before the extruded resin flows into the feed block 3 or the multilayer manifold mold, the pulsation of the extruded resin caused by the rotation of the extrusion screw is provided by providing gear pumps 5 and 6 between the machines 1 and 2 and the feed block 3 or the multilayer manifold mold. A method for producing a multilayer film, which is individually solved for each of the extruders 1 and 2.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、多層フィルムを共押出
する多層フィルムの製造方法に関する。FIELD OF THE INVENTION The present invention relates to a method for producing a multilayer film by coextruding the multilayer film.
【０００２】[0002]
【従来の技術】従来、共押出法による多層フィルムの製
造は、一般に、複数の押出機を用いて １）溶融樹脂が金型前で積層されるフィードブロック
法、２）溶融樹脂が金型内で積層される多層マニフォー
ルド法で行われている。2. Description of the Related Art Conventionally, a multilayer film is generally manufactured by a co-extrusion method using a plurality of extruders. 1) A feed block method in which molten resin is laminated in front of a mold, 2) Molten resin in a mold. It is carried out by the multi-layer manifold method of laminating in.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
フィードブロック法、多層マニフォールド法のいずれの
方法においても、押出機のスクリュー回転により生じる
押出樹脂の脈動により多層フィルムの各層の樹脂の合流
点で界面に乱れが生じ、多層フィルムにスクリューピッ
チ状の波模様が発生し、外観不良が発生することがあ
る。However, in both the feed block method and the multi-layer manifold method described above, the pulsation of the extruded resin caused by the rotation of the screw of the extruder causes an interface at the confluence of the resin of each layer of the multi-layer film. May occur, and a screw pitch wave pattern may be generated on the multilayer film, resulting in poor appearance.
【０００４】本発明は、上記問題点に鑑みなされたもの
で、スクリューピッチ状の波模様の発生を防止し、多層
フィルムの外観を向上させることができる多層フィルム
の製造方法を提供することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for producing a multilayer film which can prevent the generation of a screw pitch wave pattern and improve the appearance of the multilayer film. And
【０００５】[0005]
【課題を解決するための手段】本発明多層フィルムの製
造方法は、フィードブロックまたは多層マニフォールド
金型と複数の押出機とを用いて多層フィルムを共押出す
る多層フィルムの製造方法において、多層フィルムの各
層の樹脂を押出す押出機のそれぞれの押出機とフィード
ブロックまたは多層マニフォールド金型との間にギアポ
ンプを設け、押出スクリューの回転により生じる押出樹
脂の脈動を押出樹脂がフィードブロックまたは多層マニ
フォールド金型に流入する前に押出機毎に個別に解消す
ることを特徴とするものである。The method for producing a multilayer film according to the present invention is a method for producing a multilayer film in which a multilayer film is coextruded using a feed block or a multilayer manifold mold and a plurality of extruders. A gear pump is installed between each extruder of the extruder that extrudes the resin of each layer and the feed block or the multilayer manifold mold, and the pulsation of the extruded resin caused by the rotation of the extrusion screw causes the extruded resin to form the feed block or the multilayer manifold mold. It is characterized in that it is individually solved for each extruder before flowing into the.
【０００６】本発明多層フィルムの製造方法において、
ギアボンプの運転方法は、１）ギアポンプの吸入圧力の
変動を原料供給装置及び押出機スクリュー回転数にフィ
ードバックさせ、ギアポンプの回転数を一定に保つ方
法、２）ギアポンプの回転数を変化させ、吸入圧力を一
定に調整する方法、などのどの方法で行ってもよい。In the method for producing the multilayer film of the present invention,
The operation method of the gear pump is as follows: 1) a method of feeding back the fluctuation of the suction pressure of the gear pump to the raw material supply device and the rotation speed of the extruder screw to keep the rotation speed of the gear pump constant, 2) changing the rotation speed of the gear pump, May be adjusted to a constant value.
【０００７】[0007]
【作用】本発明多層フィルムの製造方法においては、多
層フィルムの各層の樹脂を押出す押出機のそれぞれの押
出機にギアポンプを設けたので、押出機のスクリュー回
転により発生する脈動が押出機毎に個別に解消されて押
出樹脂がフィードブロックまたは多層マニフォールド金
型に送られる。これにより、フィードブロックまたは多
層マニフォールド金型の合流点における押出樹脂の流速
が安定し、界面の乱れが解消され、スクリューピッチ状
の波模様がなくなり、多層フィルムの外観が向上する。In the method for producing a multilayer film of the present invention, since a gear pump is provided in each extruder of the extruder for extruding the resin of each layer of the multilayer film, the pulsation generated by the screw rotation of the extruder is different for each extruder. Dissolved individually and the extruded resin is sent to a feedblock or multi-layer manifold mold. This stabilizes the flow velocity of the extruded resin at the confluence of the feed block or the multilayer manifold die, eliminates the disturbance of the interface, eliminates the screw pitch wave pattern, and improves the appearance of the multilayer film.
【０００８】[0008]
【実施例】本発明多層フィルムの製造方法の実施例を図
を参照して説明する。図１は本発明製造方法による共押
出設備の一例を示した説明図である。図１において、１
は樹脂Ａを押出す押出機、２は樹脂Ｂを押出す押出機、
３は樹脂Ａと樹脂Ｂを合流させて２種３層フィルムとす
るフィードブロック、４はＴダイである。５は押出機１
とフィードブロック３との間に設けられたギアポンプ、
６は押出機２とフィードブロック３との間に設けられた
ギアポンプであり、ギアポンプ５、６はそれぞれ押出機
１、２毎に設けられている。EXAMPLES Examples of the method for producing a multilayer film of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an example of a coextrusion equipment according to the production method of the present invention. In FIG. 1, 1
Is an extruder for extruding resin A, 2 is an extruder for extruding resin B,
Reference numeral 3 is a feed block in which the resin A and the resin B are combined to form a two-kind three-layer film, and 4 is a T die. 5 is an extruder 1
And a gear pump provided between the feed block 3 and
Reference numeral 6 is a gear pump provided between the extruder 2 and the feed block 3, and the gear pumps 5 and 6 are provided for each of the extruders 1 and 2.
【０００９】押出機１で押出された樹脂Ａの脈動はギア
ポンプ５で解消され、押出機２で押出された樹脂Ｂの脈
動はギアポンプ６で解消される。その後、それぞれフィ
ードブロック３に送られ、フィードブロック３で樹脂Ａ
と樹脂Ｂが合流され、樹脂Ａの両側に樹脂Ｂが積層され
た２種３層フィルムとしてＴダイ４から押出される。The pulsation of the resin A extruded by the extruder 1 is eliminated by the gear pump 5, and the pulsation of the resin B extruded by the extruder 2 is eliminated by the gear pump 6. After that, each is sent to the feed block 3, and the resin A is fed in the feed block 3
And the resin B are joined together and extruded from the T die 4 as a type 2 three-layer film in which the resin B is laminated on both sides of the resin A.
【００１０】上記のように押出機１、２毎にギアポンプ
５、６を設けて樹脂Ａと樹脂Ｂとからなる２種３層フィ
ルムを押出したところ、従来発生していたスクリューピ
ッチ状の波模様が解消された良好な外観を有する２種３
層フィルムが得られた。また樹脂の流れ方向の厚み精度
も向上した。As described above, the gear pumps 5 and 6 are provided for the extruders 1 and 2, respectively, and a type 2 three-layer film made of resin A and resin B is extruded. Type 2 with a good appearance in which
A layer film was obtained. In addition, the thickness accuracy in the resin flow direction was also improved.
【００１１】図２は押出機毎にギアポンプが設けられて
いない比較例を示した説明図である。図２において、１
１は樹脂Ａを押出す押出機、１２は樹脂Ｂを押出す押出
機、１３は樹脂Ａと樹脂Ｂを合流させるフィードブロッ
ク、１４は押出機１２とフィードブロック１３との間に
設けられたギアポンプである。この場合には、サブ押出
機である押出機１２のみにギアポンプ１４が設けられ、
メイン押出機である押出機１１のにはギアポンプが設け
られていない。FIG. 2 is an explanatory view showing a comparative example in which a gear pump is not provided for each extruder. In FIG. 2, 1
1 is an extruder for extruding a resin A, 12 is an extruder for extruding a resin B, 13 is a feed block for joining the resin A and the resin B, and 14 is a gear pump provided between the extruder 12 and the feed block 13. Is. In this case, only the extruder 12, which is the sub-extruder, is provided with the gear pump 14,
The extruder 11 which is the main extruder is not provided with a gear pump.
【００１２】この共押出設備で上記２種３層フィルムを
押出したところ、従来と同様なスクリューピッチ状の波
模様が発生した。When the above-mentioned type 2 three-layer film was extruded by this coextrusion equipment, a screw-pitch-like wave pattern similar to the conventional one was generated.
【００１３】[0013]
【発明の効果】本発明多層フィルムの製造方法は、上記
のように構成されているので、押出機のスクリュー回転
により生じる脈動を押出樹脂がフィードブロックまたは
多層マニフォールド金型に流入する前に押出機毎に個別
に解消することができ、スクリューピッチ状の波模様を
なくして、多層フィルムの外観を向上させることができ
る。EFFECTS OF THE INVENTION Since the method for producing a multilayer film of the present invention is configured as described above, the pulsation generated by the screw rotation of the extruder is generated before the extruded resin flows into the feed block or the multilayer manifold die. This can be solved individually, and the appearance of the multilayer film can be improved by eliminating the screw pitch wave pattern.
【図１】本発明製造方法による共押出設備の一例を示し
た説明図。FIG. 1 is an explanatory view showing an example of a co-extrusion equipment according to the manufacturing method of the present invention.
【図２】押出機毎にギアポンプが設けられていない比較
例を示した説明図。FIG. 2 is an explanatory diagram showing a comparative example in which a gear pump is not provided for each extruder.
１、２ 押出機 ３ フィードブロック ４ Ｔダイ ５、６ ギアポンプ 1, 2 Extruder 3 Feed block 4 T-die 5, 6 Gear pump
Claims (1)
ルド金型と複数の押出機とを用いて多層フィルムを共押
出する多層フィルムの製造方法において、多層フィルム
の各層の樹脂を押出す押出機のそれぞれの押出機とフィ
ードブロックまたは多層マニフォールド金型との間にギ
アポンプを設け、押出スクリューの回転により生じる押
出樹脂の脈動を押出樹脂がフィードブロックまたは多層
マニフォールド金型に流入する前に押出機毎に個別に解
消することを特徴とする多層フィルムの製造方法。1. A method for producing a multilayer film in which a multilayer film is co-extruded using a feed block or a multilayer manifold mold and a plurality of extruders, each extruder of an extruder for extruding a resin of each layer of the multilayer film. A gear pump is installed between the feed block and the multi-layer manifold mold to eliminate the pulsation of the extruded resin caused by the rotation of the extrusion screw for each extruder before the extruded resin flows into the feed block or the multi-layer manifold mold. A method for producing a multilayer film, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6144486A JPH081752A (en) | 1994-06-27 | 1994-06-27 | Method for producing multilayer film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6144486A JPH081752A (en) | 1994-06-27 | 1994-06-27 | Method for producing multilayer film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH081752A true JPH081752A (en) | 1996-01-09 |
Family
ID=15363449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6144486A Pending JPH081752A (en) | 1994-06-27 | 1994-06-27 | Method for producing multilayer film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH081752A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016052603A1 (en) * | 2014-09-30 | 2016-04-07 | 積水化学工業株式会社 | Laminated glass intermediate film, laminated glass and laminated glass intermediate film production method |
| JP2017178676A (en) * | 2016-03-30 | 2017-10-05 | 積水化学工業株式会社 | Intermediate film for laminated glass, laminated glass, and method for producing intermediate film for laminated glass |
-
1994
- 1994-06-27 JP JP6144486A patent/JPH081752A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016052603A1 (en) * | 2014-09-30 | 2016-04-07 | 積水化学工業株式会社 | Laminated glass intermediate film, laminated glass and laminated glass intermediate film production method |
| JP5997396B2 (en) * | 2014-09-30 | 2016-09-28 | 積水化学工業株式会社 | Intermediate film for laminated glass, laminated glass, and method for producing interlayer film for laminated glass |
| JP2017014104A (en) * | 2014-09-30 | 2017-01-19 | 積水化学工業株式会社 | Laminated glass interlayer film and laminated glass |
| KR20170063436A (en) * | 2014-09-30 | 2017-06-08 | 세키스이가가쿠 고교가부시키가이샤 | Laminated glass intermediate film, laminated glass and laminated glass intermediate film production method |
| US11097517B2 (en) | 2014-09-30 | 2021-08-24 | Sekisui Chemical Co., Ltd. | Laminated glass intermediate film, laminated glass and laminated glass intermediate film production method |
| TWI763626B (en) * | 2014-09-30 | 2022-05-11 | 日商積水化學工業股份有限公司 | Interlayer film for laminated glass, laminated glass, and method for producing the interlayer film for laminated glass |
| JP2017178676A (en) * | 2016-03-30 | 2017-10-05 | 積水化学工業株式会社 | Intermediate film for laminated glass, laminated glass, and method for producing intermediate film for laminated glass |
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