JPH0262377B2 - - Google Patents
Info
- Publication number
- JPH0262377B2 JPH0262377B2 JP60295325A JP29532585A JPH0262377B2 JP H0262377 B2 JPH0262377 B2 JP H0262377B2 JP 60295325 A JP60295325 A JP 60295325A JP 29532585 A JP29532585 A JP 29532585A JP H0262377 B2 JPH0262377 B2 JP H0262377B2
- Authority
- JP
- Japan
- Prior art keywords
- slit
- polypropylene
- cooling
- film
- water tank
- 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.)
- Expired - Lifetime
Links
- 239000004743 Polypropylene Substances 0.000 claims description 37
- -1 polypropylene Polymers 0.000 claims description 37
- 229920001155 polypropylene Polymers 0.000 claims description 37
- 238000001816 cooling Methods 0.000 claims description 29
- 239000000110 cooling liquid Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 55
- 239000002826 coolant Substances 0.000 description 19
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 3
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 1
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920005633 polypropylene homopolymer resin Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
-
- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、押出機から溶融状態で押し出された
膜状のポリプロピレンを、滞留のない冷却液で急
速に冷却し、透明性および光沢などの表面特性に
優れたシート類の製造を行なうポリプロピレンシ
ート類の製造方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention rapidly cools polypropylene in the form of a film extruded from an extruder in a molten state with a cooling liquid that does not stagnate, thereby improving transparency and gloss. The present invention relates to a method for producing polypropylene sheets, which produces sheets with excellent surface properties.
［従来の技術］
ポリプロピレンのシートを溶融押出成形する場
合には、樹脂の溶融点より急冷して結晶化を防止
しないと透明度の高いシートを得ることができ
ず、その利用範囲は大幅に制限されてしまう。こ
のため、ポリプロピレンシート製造における急冷
法として従来より種々の方法が開発され、その中
でもチルロール法および水冷法が多く用いられて
いる。[Prior Art] When melt-extruding a polypropylene sheet, it is impossible to obtain a highly transparent sheet unless it is rapidly cooled below the melting point of the resin to prevent crystallization, and its range of use is greatly limited. I end up. For this reason, various methods have been developed as quenching methods for producing polypropylene sheets, and among them, the chill roll method and the water cooling method are often used.
しかし、チルロール法では、高速成形時におけ
る空気の巻き込みなどによるロールと樹脂膜の密
着不良、あるいは、強冷時における空気中水蒸気
の凝縮による水滴の急激な部分蒸発に起因するあ
ばたの発生等により、良好な透明性、表面特性を
有するシートを得られないとともに、表裏におけ
る冷却温度の差によつてシートにカールの発生す
ることがあつた。また、水冷法では、チルロール
法より冷却効果が大きいものの、溶融樹脂膜の放
熱が水面で生じるため、水面の波打ちと相まつて
均一な冷却を行なえず、透明性、表面特性、肉厚
精度の良好なシートを得ることができなかつた。 However, with the chill roll method, there are problems such as poor adhesion between the roll and resin film due to air entrainment during high-speed molding, or the occurrence of pockmarks due to rapid partial evaporation of water droplets due to condensation of water vapor in the air during strong cooling. It was not possible to obtain a sheet with good transparency and surface properties, and the sheet sometimes curled due to the difference in cooling temperature between the front and back surfaces. In addition, although the water cooling method has a greater cooling effect than the chill roll method, since the heat dissipation of the molten resin film occurs on the water surface, this combined with the waving of the water surface prevents uniform cooling, resulting in good transparency, surface characteristics, and wall thickness accuracy. I couldn't get a proper sheet.
そこで、上記水冷法の有する欠点を除去すべ
く、冷却水の流れるスリツト中に溶融樹脂膜を通
して冷却する、水冷法を改良したものが種々提案
されている。本出願人も、特開昭58−203018号に
おいて改良水冷法について提案している。 Therefore, in order to eliminate the drawbacks of the water cooling method described above, various improvements have been proposed to the water cooling method in which cooling is performed by passing a molten resin film through a slit through which cooling water flows. The present applicant also proposed an improved water cooling method in Japanese Patent Application Laid-Open No. 58-203018.
［解決すべき問題点］
しかしながら、上述した改良水冷法において
も、その透明性については十分解決されていな
い。また、本出願人の提案したスリツト水冷法
も、透明なポリプロピレンシートを得るための優
れた方法の一つではあるが、透明度が加速度的に
低くなる肉厚のシートを、早い速度で製造する場
合には、冷却効率が必ずしも十分でなく、透明性
にやや難があつた。[Problems to be Solved] However, even in the above-mentioned improved water cooling method, the transparency thereof has not been sufficiently solved. In addition, the slit water cooling method proposed by the applicant is also an excellent method for obtaining transparent polypropylene sheets, but when producing thick sheets at a high speed, the transparency decreases at an accelerating rate. However, the cooling efficiency was not necessarily sufficient, and the transparency was somewhat difficult.
本発明は上記の事情にかんがみてなされたもの
で、スリツトへの冷却液の流入をスムースかつ急
速に行なわせることにより、表面特性および透明
性に優れたシート、特に、肉厚のシートを得られ
るようにしたポリプロピレンシート類の製造方法
の提供を目的とする。 The present invention has been made in view of the above circumstances, and by making the flow of cooling liquid into the slits smooth and rapid, it is possible to obtain a sheet with excellent surface properties and transparency, especially a thick sheet. The object of the present invention is to provide a method for producing polypropylene sheets.
［問題点の解決手段］
上記目的を達成するため本発明のポリプロピレ
ンシート類の製造方法は、ダイから押し出された
膜状のポリプロピレンを冷却液の流下するスリツ
トに導入し、急冷してシート類を製造する際に、
冷却後を、スリツト導入部を中心として２〜45度
の角度で向かい合わせに傾斜する二枚の傾斜板面
上に流し、スリツト導入部における冷却液の滞留
を防止しながらスリツトに流下させる方法として
ある。[Means for Solving Problems] In order to achieve the above object, the method for manufacturing polypropylene sheets of the present invention introduces polypropylene in the form of a film extruded from a die into a slit through which a cooling liquid flows, rapidly cools it, and then forms the sheets. When manufacturing,
After cooling, the coolant is poured onto two inclined plates facing each other at an angle of 2 to 45 degrees around the slit introduction part, and the coolant is allowed to flow down into the slit while preventing the coolant from stagnation in the slit introduction part. be.
［実施例］
以下、本発明の実施例方法について図面を参照
して説明する。[Example] Hereinafter, an example method of the present invention will be described with reference to the drawings.
第１図は本製造方法を実施するための一装置例
を示し、第２図は要部の拡大図を示す。この図に
より、まず装置例について説明する。 FIG. 1 shows an example of an apparatus for implementing the present manufacturing method, and FIG. 2 shows an enlarged view of the main parts. An example of the apparatus will first be described with reference to this figure.
第１図において、１は膜状のポリプロピレンで
あり、Ｔダイ２から溶融状態で押し出される。１
０は上部水槽であり、第一水槽１１と、この第一
水槽１１の下部に設けた第二水槽１５とで構成し
てある。第一水槽１１は、その中心部に、膜状の
ポリプロピレンを通過させるため第一スリツト１
２を設けてある。この第一スリツト１２は、冷却
液を、乱流を生じない状態で十分流すことができ
るようにするため、第２図に示すように開度ｂを
１mm〜20mmの範囲とし、長さｈを20mm〜200mm、
好ましくは30mm〜100mmの範囲内としてある。 In FIG. 1, 1 is a polypropylene film, which is extruded from a T-die 2 in a molten state. 1
0 is an upper water tank, which is composed of a first water tank 11 and a second water tank 15 provided below the first water tank 11. The first water tank 11 has a first slit 1 in its center for passing the film-like polypropylene.
2 is provided. In order to allow the cooling liquid to flow sufficiently without causing turbulence, the first slit 12 has an opening b in the range of 1 mm to 20 mm and a length h as shown in Fig. 2. 20mm~200mm,
It is preferably within the range of 30 mm to 100 mm.
第一水槽１１の冷却液を流す流路部分は、第一
スリツト１２を中心として向かい合い、互いに第
一スリツト１２側に低くなる二枚の傾斜板１３に
よつて形成してある。この傾斜板１３の傾斜角θ
は２度から45度の範囲内としなければならず、こ
の範囲内であると、冷却液を乱流を生じない状態
で急速に流し、しかも第一スリツト１２に導入入
された膜状のポリプロピレン１に強く当らないよ
うに流すことができる。これをより確実にするに
は、傾斜板１３の傾斜角θを３度から30度の範囲
内とすることが好ましい。 The flow path portion of the first water tank 11 through which the cooling liquid flows is formed by two inclined plates 13 that face each other with the first slit 12 in the center and are lowered toward the first slit 12 side. Inclination angle θ of this inclined plate 13
must be within the range of 2 degrees to 45 degrees, and within this range, the cooling liquid can flow rapidly without turbulence, and the film-like polypropylene introduced into the first slit 12 can You can flow it without hitting 1 too hard. In order to make this more reliable, it is preferable that the inclination angle θ of the inclined plate 13 is within the range of 3 degrees to 30 degrees.
傾斜角を45度より大きい角度とすると、冷却液
の流速は早くなるものの、冷却液に乱流を生じ
る。また、傾斜角を２度より小さくすると十分な
流速を得ることができず、冷却効果が低下する。 When the angle of inclination is greater than 45 degrees, the flow rate of the coolant increases, but turbulence occurs in the coolant. Furthermore, if the inclination angle is smaller than 2 degrees, a sufficient flow velocity cannot be obtained and the cooling effect is reduced.
さらに、二枚の傾斜板１３は、第一スリツト１
２に流入する冷却液の流量、流速等のバランスを
保つために、同じ傾斜角とすることが好ましい。 Further, the two inclined plates 13 have the first slit 1
In order to maintain balance in the flow rate, flow velocity, etc. of the cooling liquid flowing into the cooling liquid, it is preferable that the angle of inclination is the same.
また、第一スリツト１２と傾斜板１３の接続部
は、直角か小さい径の丸みをもたせた状態、すな
わち、接続部径Ｒ＝０〜10mmとする。このように
すると、傾斜板１３から流れてきた冷却液は、ス
リツト導入部において膜状のポリプロピレンの導
入方向と同方向に滞りなく向きを変え、第一スリ
ツト１２の内部へ膜状ポリプロピレン１と平行に
スムースに流入する。 Further, the connection portion between the first slit 12 and the inclined plate 13 is set at a right angle or rounded with a small diameter, that is, the connection portion diameter R is 0 to 10 mm. In this way, the cooling liquid flowing from the inclined plate 13 smoothly changes its direction in the same direction as the introduction direction of the film-like polypropylene at the slit introduction part, and flows into the first slit 12 parallel to the film-like polypropylene 1. flows smoothly into the
さらに、第一水槽１１には多孔性材からなる整
流体１４を多重に設け、第一スリツト１２に供給
される冷却液の波立ちや揺れを防止し、膜状のポ
リプロピレン１に対して波立ちのない均一な水流
と水量が得られるようにしてある。 Furthermore, the first water tank 11 is provided with multiple flow regulators 14 made of porous material to prevent the cooling liquid supplied to the first slit 12 from undulating or shaking, and to prevent the film-like polypropylene 1 from undulating. This ensures uniform water flow and volume.
第二水槽１５は、その中心部に第一スリツト１
２と連続する第二スリツト１６が設けてある。こ
の第二スリツト１６は第一スリツト１２より広い
開度を有し、第一スリツト１２の先端部を囲繞す
るように形成してある。第二スリツト１６におい
ては、第一スリツト１２を流下してきた冷却液に
新たな冷却液を追加し、膜状のポリプロピレン１
の二次冷却を行なう。なお、第一スリツト１２と
第二スリツト１６に流す冷却液は、同種のものを
用いる。１７は膜状のポリプロピレンを上部水槽
１０より引き出すためのガイドロールである。 The second water tank 15 has a first slit 1 in its center.
A second slit 16 is provided which is continuous with the second slit 2. The second slit 16 has a wider opening than the first slit 12 and is formed to surround the tip of the first slit 12. In the second slit 16, new cooling liquid is added to the cooling liquid that has flowed down the first slit 12, and a film of polypropylene is added.
Perform secondary cooling. Note that the same type of cooling liquid is used to flow into the first slit 12 and the second slit 16. Reference numeral 17 denotes a guide roll for drawing out the film-like polypropylene from the upper water tank 10.
２０は下部水槽であり、上部水槽１０の下方に
設けてある。この下部水槽２０中には狭圧ロール
２１が配置してあり、膜状のポリプロピレン１を
狭圧しシート表面の水の境膜をいつたん除くとと
もに、膜状のポリプロピレン１を常にスリツト中
央部に位置させて一定速度で走行させる。狭圧ロ
ール２１としては、金属ロール、シリコンゴムな
どのゴムロールあるいはこれらを組み合わせたも
のを用いる。 20 is a lower water tank, which is provided below the upper water tank 10. A narrow pressure roll 21 is disposed in the lower water tank 20, which compresses the polypropylene film 1 to remove the water film on the sheet surface, and keeps the polypropylene film 1 in the center of the slit. and run at a constant speed. As the narrow pressure roll 21, a metal roll, a rubber roll such as silicone rubber, or a combination thereof is used.
２２は引取りロールで、冷却した膜状のポリプ
ロピレン１を下部水槽２０より引き出し二次工程
に送る。２３は下部水槽２０中に設けた溢流板
で、水槽２０の冷却液水位を一定に保つている。
２４はポンプであり、冷却器２５によつて所定温
度まで冷却された冷却液を、上部水槽１０の第一
水槽１１と第二水槽１５に環流させる。 22 is a take-up roll that pulls out the cooled film-like polypropylene 1 from the lower water tank 20 and sends it to the secondary process. 23 is an overflow plate provided in the lower water tank 20, which keeps the coolant level in the water tank 20 constant.
A pump 24 circulates the cooling liquid cooled to a predetermined temperature by the cooler 25 to the first water tank 11 and the second water tank 15 of the upper water tank 10.
次に、この装置例を用いた本発明製造方法の一
実施例について説明する。 Next, an example of the manufacturing method of the present invention using this example of apparatus will be described.
Ｔダイ２より押し出された膜状のポリプロピレ
ン１を冷却液の流れている第一水槽１１の第一ス
リツト１２に導入する。このとき、第一スリツト
１２に流入する冷却液の水位は２mm〜10mmの範囲
とし、一般的には７mm以下とすることが好まし
い。水位が10mmを越えると得られたシートに沸騰
斑、ヘイズ斑、カール等が発生し、さらには総ヘ
イズも高くなり好ましくない結果となる。上述し
た第一水槽１１に２mm〜10mmの水位で冷却液を流
すと、冷却液は滞留を生じることなく、膜状のポ
リプロピレン１との接触位置においてスムースに
流れる。 A polypropylene film 1 extruded from a T-die 2 is introduced into a first slit 12 of a first water tank 11 through which a cooling liquid is flowing. At this time, the water level of the coolant flowing into the first slit 12 is in the range of 2 mm to 10 mm, and is generally preferably 7 mm or less. If the water level exceeds 10 mm, boiling spots, haze spots, curls, etc. will occur on the obtained sheet, and the total haze will also increase, resulting in unfavorable results. When the cooling liquid is poured into the first water tank 11 described above at a water level of 2 mm to 10 mm, the cooling liquid flows smoothly at the contact position with the polypropylene film 1 without stagnation.
なお、冷却液としては、一般的には通常水を使
用し、必要に応じて凝固点降下剤、界面活性剤、
増粘剤、防錆剤などの添加剤を混入して使用す
る。冷却液の温度は50℃以下とし、冷却効率の観
点からは20℃以下とすることが好ましい。 In addition, water is generally used as the coolant, and if necessary, freezing point depressants, surfactants,
Additives such as thickeners and rust preventives are used. The temperature of the cooling liquid is 50°C or less, and from the viewpoint of cooling efficiency, it is preferably 20°C or less.
膜状のポリプロピレン１は、第一スリツト１２
を通過する間に一次冷却が行なわれる。すなわ
ち、膜状のポリプロピレン１の両面を平行に流れ
る冷却液によつて熱が吸収され冷却が行なわれ
る。この場合、多量の冷却液を流すことができる
ので、その冷却効率は非常に高い。第一スリツト
１２を流れる冷却後の流速は、膜状のポリプロピ
レン１の走行速度と同じかそれよりも早くするこ
とがよく、できれば走行速度の1.5倍以上とする
のが好ましい。 The film-like polypropylene 1 has a first slit 12
Primary cooling occurs during the passage through the . That is, heat is absorbed by the cooling liquid flowing parallel to both sides of the film-like polypropylene 1, thereby performing cooling. In this case, since a large amount of cooling liquid can flow, the cooling efficiency is very high. The flow rate after cooling through the first slit 12 is preferably the same as or higher than the traveling speed of the film-like polypropylene 1, preferably at least 1.5 times the traveling speed.
膜状のポリプロピレン１は、第一スリツト１２
を通過し、第一スリツト１２の下方に送られる
と、第二スリツト１６中において二次冷却が行な
われる。すなわち、第一スリツト１２を流れてき
た冷却液と、第二水槽１５を流れてきた新たな冷
却液とが混流した状態で膜状のポリプロピレン１
の両面と接触して冷却を行なう。この場合、第二
スリツト１６を流れてきた冷却液は第一スリツト
１２を流れてきた冷却液より低温なので、これら
が混合した二次冷却液も第一スリツト１２を流れ
てきた冷却液より低温となり、さらに冷却効率を
高める。 The film-like polypropylene 1 has a first slit 12
After passing through and being sent below the first slit 12, secondary cooling is performed in the second slit 16. That is, the film-like polypropylene 1 is mixed with the coolant that has flowed through the first slit 12 and the new coolant that has flowed through the second water tank 15.
cooling by contacting both sides of the In this case, the coolant that has flowed through the second slit 16 is lower in temperature than the coolant that has flowed through the first slit 12, so the secondary coolant in which they are mixed is also lower in temperature than the coolant that has flowed through the first slit 12. , further increasing cooling efficiency.
上述のようにして、上部水槽１０で冷却された
膜状のポリプロピレン１は、狭圧ロール２１およ
び引取りロール２２によつて下部水槽２０の冷却
液中を通過させられ三次冷却を行なわれる。その
後、二次工程に送られ、ここで冷却液（水）切り
後、必要に応じ熱処理、軽度の延伸、圧延等の処
理が行なわれる。 As described above, the film-like polypropylene 1 cooled in the upper water tank 10 is passed through the cooling liquid in the lower water tank 20 by the narrow pressure roll 21 and the take-up roll 22 to perform tertiary cooling. After that, it is sent to a secondary process, where after draining the cooling liquid (water), heat treatment, light stretching, rolling, etc. are performed as necessary.
上記の実施例方法によつて得られた結果を、さ
らに具体的にまとめると次のようになる。 A more specific summary of the results obtained by the above-mentioned method is as follows.
実施例方法１による結果
条件：ホモポリプロピレン樹脂（密度0.91ｇ／
cm3、MI2ｇ／10min、出光石油化学(株)製商品名：
出光ポリプロピレンF200S）をＴダイ押出装置
（押出機90mmφ、Ｌ／D28、ダイ巾730mm、ダイリ
ツプ開度２mm、リツプヒーター付）を用いて樹脂
温度240℃、ダイリツプ温度280℃で溶融混練し、
透明な溶融樹脂膜（膜状の熱可塑性樹脂）を押出
した。次いで、この溶融樹脂膜を上部水槽１０に
おける第一水槽１１（第一スリツト：長さｈ＝50
mm、開度ｂ＝３mm 冷却液：通常水、水位５mm、
水温４℃ 多孔整流体：60メツシユ金網二枚重ね
四 段傾斜板：傾斜角θ＝30度、接続部径Ｒ＝３
mm）に連続的に導入して急冷し、次いで120℃で
熱処理し、ポリプロピレンシート（厚み0.5mm）
を成形速度８ｍ／minで得た。Results according to Example Method 1 Conditions: Homopolypropylene resin (density 0.91g/
cm 3 , MI2g/10min, manufactured by Idemitsu Petrochemical Co., Ltd. Product name:
Idemitsu Polypropylene F200S) was melt-kneaded using a T-die extrusion device (extruder 90 mmφ, L/D 28, die width 730 mm, die lip opening 2 mm, lip heater included) at a resin temperature of 240°C and a die lip temperature of 280°C.
A transparent molten resin film (film-like thermoplastic resin) was extruded. Next, this molten resin film is poured into the first water tank 11 (first slit: length h = 50 mm) in the upper water tank 10.
mm, opening b = 3mm Coolant: Normal water, water level 5mm,
Water temperature: 4°C Porous fluid regulator: 60 mesh wire mesh, two layers, four-stage inclined plate: Incline angle θ = 30 degrees, connection diameter R = 3
Polypropylene sheet (thickness 0.5 mm)
was obtained at a molding speed of 8 m/min.
結果：この結果、ASTM D1003規格による震
度8.0％（内部霞度6.0％）のシートを得ることが
できた。 Results: As a result, we were able to obtain a sheet with a seismic intensity of 8.0% (internal haze of 6.0%) according to the ASTM D1003 standard.
実施例方法２による結果
条件：実施例方法１における二次冷却を行なわ
ない以外は、実施例方法１に準じてポリプロピレ
ンシートを得た。Results of Example Method 2 Conditions: A polypropylene sheet was obtained according to Example Method 1 except that the secondary cooling in Example Method 1 was not performed.
結果：その結果、霞度9.5％（内部霞度6.5％）
のシートを得ることができた。 Result: As a result, haze level is 9.5% (internal haze level is 6.5%)
I was able to get a seat.
比較例結果
第一水槽の傾斜板の傾斜角θを０、すなわち水
平とした以外は、上記実施例方法１に準じて行な
いポリプロピレンシートを得た。その結果、シー
トの霞度は13.0％（内部霞度8.0％）であつた。Comparative Example Results A polypropylene sheet was obtained in accordance with Example Method 1, except that the inclination angle θ of the inclined plate of the first water tank was set to 0, that is, horizontal. As a result, the haze level of the sheet was 13.0% (internal haze level 8.0%).
このように、本実施例方法によれば、冷却効率
が高く冷却液の滞留のない状態で膜状のポリプロ
ピレンの冷却を行なえるので、透明度が高く、光
沢度などの表面特性に優れたシートを得ることが
できる。特に、肉厚の大きいシートに効果的であ
り、製造速度の高速化も図れる。 As described above, according to the method of this embodiment, film-like polypropylene can be cooled with high cooling efficiency and no stagnation of the cooling liquid, so it is possible to produce sheets with high transparency and excellent surface properties such as gloss. Obtainable. It is particularly effective for thick sheets, and can increase the manufacturing speed.
第３図は本方法の実施に用いる他の装置例の上
部水槽における第一水槽の変形例を示すもので、
冷却液の流れる第一水槽１１の傾斜板１３に、所
定の傾斜角をもたせるとともに、緩るい丸みをも
たせたものである。このようにすると、冷却液の
流れがスムースになり、スリツトへの流入がより
スムースになつて滞留防止の効果を一層高めるこ
とができる。 FIG. 3 shows a modification of the first water tank in the upper water tank of another example of the apparatus used for carrying out the present method.
The inclined plate 13 of the first water tank 11 through which the coolant flows has a predetermined angle of inclination and a gentle roundness. In this way, the flow of the cooling liquid becomes smooth, and the flow into the slit becomes smoother, so that the effect of preventing stagnation can be further enhanced.
なお、本発明における製造方法はシート（３mm
〜0.2mm）のみならずフイルム（0.2mm未満）の一
部にも用いることができる。したがつて、本発明
におけるシートとは、フイルムの一部をも含むこ
とを意味し、また、多層シート等を含むことも勿
論である。 In addition, the manufacturing method in the present invention is a sheet (3 mm
~0.2mm) as well as part of the film (less than 0.2mm). Therefore, the term "sheet" in the present invention means that it also includes a part of a film, and of course also includes a multilayer sheet and the like.
さらに、上部水槽１１に第三水槽以上の水槽を
多段に設け、それぞれの水槽のスリツトにおいて
三次以後の冷却を行なうことも可能である。 Furthermore, it is also possible to provide a third or higher water tank in multiple stages in the upper water tank 11, and perform tertiary and subsequent cooling in the slits of each tank.
［発明の効果］
以上のごとく本発明によれば、膜状のポリプロ
ピレンと冷却液との接触位置における冷却液の流
れが非常にスムースとなり、冷却液の滞留を防止
することができるので、透明度が高く表面特性に
優れたシート類を製造することができる。[Effects of the Invention] As described above, according to the present invention, the flow of the coolant at the contact position between the film-like polypropylene and the coolant becomes very smooth, and stagnation of the coolant can be prevented, so that the transparency is improved. It is possible to produce sheets with high and excellent surface properties.
第１図は本製造方法の実施に用いるための一装
置例、第２図は要部の拡大図を示し、第３図は本
方法の実施に用いる他の装置例の要部拡大図を示
す。
１：膜状のポリプロピレン、２：Ｔダイ、１
０：上部水槽、１１：第一水槽、１２：第一スリ
ツト、１３：傾斜板、１４：整流板、１５：第二
水槽、１６：第二スリツト。
Fig. 1 shows an example of an apparatus used to carry out the present manufacturing method, Fig. 2 shows an enlarged view of the main parts, and Fig. 3 shows an enlarged view of the main parts of another example of equipment used to carry out the present method. . 1: Film-like polypropylene, 2: T-die, 1
0: Upper water tank, 11: First water tank, 12: First slit, 13: Inclined plate, 14: Current plate, 15: Second water tank, 16: Second slit.
Claims (1)
を冷却液の流下するスリツトに導入し、急冷して
シート類を製造する方法において、スリツト導入
部を中心として２〜45度の角度で向かい合わせに
傾斜させて形成した二枚の傾斜板面上に、整流体
を介して冷却液を流すことにより、スリツト導入
部における冷却液の滞留を防止しながらスリツト
に冷却液を流下させることを特徴としたポリプロ
ピレンシート類の製造方法。1 In a method of manufacturing sheets by introducing film-like polypropylene extruded from a die into a slit through which a cooling liquid flows and rapidly cooling it, the polypropylene film is tilted to face each other at an angle of 2 to 45 degrees with the slit introduction part as the center. A polypropylene sheet characterized by allowing the cooling liquid to flow down into the slits while preventing the cooling liquid from stagnation at the slit introduction part by flowing the cooling liquid through a flow regulator over two inclined plate surfaces formed by Methods of manufacturing products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60295325A JPS62152716A (en) | 1985-12-26 | 1985-12-26 | Manufacture of thermoplastic resin sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60295325A JPS62152716A (en) | 1985-12-26 | 1985-12-26 | Manufacture of thermoplastic resin sheets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62152716A JPS62152716A (en) | 1987-07-07 |
| JPH0262377B2 true JPH0262377B2 (en) | 1990-12-25 |
Family
ID=17819152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60295325A Granted JPS62152716A (en) | 1985-12-26 | 1985-12-26 | Manufacture of thermoplastic resin sheets |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62152716A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0490734U (en) * | 1990-12-26 | 1992-08-07 | ||
| GB9127028D0 (en) * | 1991-12-20 | 1992-02-19 | Scott & Fyfe Ltd | A method of producing a polyolefinic film by a water quench process |
| WO1995000313A1 (en) * | 1991-12-20 | 1995-01-05 | Scott & Fyfe Limited | A method of producing a polyolefinic film by a water quench process |
| JP5025967B2 (en) * | 2006-03-01 | 2012-09-12 | シーダム株式会社 | Method for producing thermoplastic resin sheet |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58203018A (en) * | 1982-05-24 | 1983-11-26 | Idemitsu Petrochem Co Ltd | Manufacture of thermoplastic resin sheet or film |
-
1985
- 1985-12-26 JP JP60295325A patent/JPS62152716A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58203018A (en) * | 1982-05-24 | 1983-11-26 | Idemitsu Petrochem Co Ltd | Manufacture of thermoplastic resin sheet or film |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62152716A (en) | 1987-07-07 |
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