JPH01204716A - Manufacture of nondirectional polypropylene film - Google Patents
Manufacture of nondirectional polypropylene filmInfo
- Publication number
- JPH01204716A JPH01204716A JP63029400A JP2940088A JPH01204716A JP H01204716 A JPH01204716 A JP H01204716A JP 63029400 A JP63029400 A JP 63029400A JP 2940088 A JP2940088 A JP 2940088A JP H01204716 A JPH01204716 A JP H01204716A
- Authority
- JP
- Japan
- Prior art keywords
- polypropylene film
- cooling roll
- roll
- film
- cooling
- 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
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 43
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 43
- -1 polypropylene Polymers 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 239000011347 resin Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 239000005026 oriented polypropylene Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 239000012748 slip agent Substances 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000005025 cast polypropylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000005001 laminate film Substances 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000565 sealant 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
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
- B29C48/9155—Pressure rollers
-
- 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
- B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
-
- 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
- B29C48/9145—Endless cooling belts
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は開封容易な包装袋を作るために使用される無方
向性ポリプロピレンフィルムの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing a non-oriented polypropylene film used for making easy-to-open packaging bags.
包装袋用ラミネートフィルムとしてシーラント層として
キャストポリプロピレンを用いるようにしたものはある
が、ポリプロピレンレジンは、結晶性の高い熱劣化を起
こし易い樹脂であるため、Ｔダイを用いてここからでる
溶融ポリプロピレンレジンをエアチャンバで冷却ロール
に密着させることで、ポリプロピレンレジンの結晶化を
防ぎ、これによりラミネートフィルムとしての劣化を防
ぐようにしている。There are some laminated films for packaging bags that use cast polypropylene as a sealant layer, but polypropylene resin is highly crystalline and easily deteriorates due to heat, so molten polypropylene resin is produced using a T-die. By bringing the polypropylene resin into close contact with a cooling roll in an air chamber, crystallization of the polypropylene resin is prevented, thereby preventing deterioration of the laminate film.
Ｔダイを用いて溶融ポリプロピレンレジンをエアチャン
バで冷却ローノーに密着させてポリプロピレンフィルム
を作る場合には、冷却ロールでの冷却途中において、作
られるポリプロピレンフィルムに縦方向の延伸力が作用
し、その結果作られたポリプロピレンフィルムに縦方向
の分子配向が生じ、このポリプロピレンフィルムをラミ
ネートしたフィルムを素材として包装袋を作った場合に
は、一方向たとえば包装袋の長手方向には切れても、こ
れと直交する方向すなわち横方向には切れ難いものとな
る。When making a polypropylene film by using a T-die to bring molten polypropylene resin into close contact with a cooling roll in an air chamber, a longitudinal stretching force acts on the polypropylene film during cooling with the cooling roll, resulting in Vertical molecular orientation occurs in the produced polypropylene film, and if a packaging bag is made from a film laminated with this polypropylene film, even if it is cut in one direction, for example the longitudinal direction of the packaging bag, it will not be oriented perpendicular to this. It is difficult to cut in the horizontal direction.
本発明は上記した点に鑑みてなされたもので、作られる
ポリプロピレンフィルムが長手方向およびこれと直交す
る方向の二方向に切れ易い構造とし、手切れ性のよい包
装袋を作り得るようにした無方向性ポリプロピレンフィ
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 points, and has a structure in which the produced polypropylene film is easily cut in two directions, the longitudinal direction and the direction orthogonal to this, thereby making it possible to produce a packaging bag with good hand tearability. It is an object of the present invention to provide a method for producing a oriented polypropylene film.
本発明の無方向性ポリプロピレンフィルムの製造方法は
、溶融したポリプロピレンレジンを支持ベルトの一面側
に乗せて冷却ロールまで送り、冷却ロールに対向配置し
たプレスロールで支持ベルトに乗った溶融ポリプロピレ
ンレジンを冷却ロールに押圧させ、形成されたポリプロ
ピレンフィルムを支持ベルトによって無延伸状態で送出
すようにして構成される。In the method for producing a non-oriented polypropylene film of the present invention, molten polypropylene resin is placed on one side of a support belt and sent to a cooling roll, and the molten polypropylene resin placed on the support belt is cooled by a press roll placed opposite to the cooling roll. The polypropylene film is pressed by a roll and the formed polypropylene film is sent out in an unstretched state by a support belt.
本発明の無方向性ポリプロピレンフィルムの製造方法に
おいては、溶融したポリプロピレンレジンを冷却ロール
で冷却する際に、溶融したポリプロピレンレジンを支持
ベルトを介してプレスロールで押圧し、作られるポリプ
ロピレンフィルムを支持ベルトに支持した状態で、冷却
ロールから無延伸状態で送り出すので、冷却ロールで冷
却する工程においてプロピレンフィルムの分子配向が生
ぜず、無方向のポリプロピレンフィルムが作られる。In the method for producing a non-oriented polypropylene film of the present invention, when the molten polypropylene resin is cooled by a cooling roll, the molten polypropylene resin is pressed by a press roll via a support belt, and the produced polypropylene film is transferred to the support belt. Since the propylene film is sent out from the cooling roll in an unstretched state while being supported by the cooling roll, molecular orientation of the propylene film does not occur during the cooling process with the cooling roll, and a non-oriented polypropylene film is produced.
以下本発明の一実施例を図面につき説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の無方向性ポリプロピレンフィルムの製
造方法を実施するための装置を示し、Ｔダイ１の下側に
は冷却ロール２およびプレスロール３が隣接配置されて
いる。上記プレスロール３と冷却ロール２の下側でかつ
冷却ロール２から横方向に距離を置いた位置に配置した
支持ローラ４゜４との間には無端状支持ベルト５が巻回
されている。上記支持ベルト５は、ポリエステルフィル
ムを素材として作られている。また上記冷却ロール２の
表面にはテフロン加工が施されていて、作られるべき無
方向性ポリプロピレンフィルム６のロール離れをよくす
るようにしている。この無方向性ポリプロピレンフィル
ム６のロール離れをよくするために、スリップ剤や離ロ
ール剤がレジンに添加されるが性能上の要求から添加が
不可能な時には冷却ロール２と別に設けた支持ローラ７
．７との間には無端状支持ベルト８を巻回してもよい。FIG. 1 shows an apparatus for carrying out the method for producing a non-oriented polypropylene film of the present invention, in which a cooling roll 2 and a press roll 3 are arranged adjacent to each other below a T-die 1. An endless support belt 5 is wound between the press roll 3 and a support roller 4° 4 disposed below the cooling roll 2 and at a distance from the cooling roll 2 in the lateral direction. The support belt 5 is made of polyester film. Further, the surface of the cooling roll 2 is treated with Teflon so that the non-oriented polypropylene film 6 to be produced can be easily separated from the roll. In order to improve roll separation of the non-oriented polypropylene film 6, a slip agent or roll release agent is added to the resin, but if this is not possible due to performance requirements, a support roller 7 provided separately from the cooling roll 2 is added.
．． An endless support belt 8 may be wound between the support belt 7 and the support belt 7.
次に作用を説明する。Next, the effect will be explained.
Ｔダイ１にはメルトインデックス２０のポリプロピレン
レジンが装入され、約２６０℃に溶融されたポリプロピ
レンレジンが下方に押出され、支持ベルト５の面に乗せ
られて冷却ロール２まで送られる。冷却ロール２に送ら
れた溶融ポリプロピレンレジンは冷却ロール２に対向配
置されたプレスロール３により支持ベルト４を介して冷
却ロールに押圧され、冷却されることでポリプロピレン
フィルム６が形成される。このポリプロピレンフィルム
６は支持ベルト５によって無延伸状態で冷却ロール２に
よって冷却され、かつこの冷却ロール２から無延伸状態
で送出されるので、作られたポリプロピレンフィルム６
に分子配向が生ぜず、無方向のポリプロピレンフィルム
が作られ、長手方向およびこれと直交する方向の二方向
に切れ易い構造となる。A polypropylene resin having a melt index of 20 is charged into the T-die 1, and the polypropylene resin melted at about 260° C. is extruded downward, placed on the surface of the support belt 5, and sent to the cooling roll 2. The molten polypropylene resin sent to the cooling roll 2 is pressed against the cooling roll via a support belt 4 by a press roll 3 disposed opposite to the cooling roll 2, and is cooled to form a polypropylene film 6. This polypropylene film 6 is cooled by the cooling roll 2 in an unstretched state by the support belt 5, and is sent out from the cooling roll 2 in an unstretched state, so that the polypropylene film 6 produced
No molecular orientation occurs, and a non-oriented polypropylene film is produced, with a structure that is easily cut in two directions: the longitudinal direction and the direction orthogonal to this.
本発明により作られたポリプロピレンフィルムと従来の
キャストポリプロピレンフィルムとの物性の比較を下表
に示す。A comparison of the physical properties of the polypropylene film made according to the present invention and a conventional cast polypropylene film is shown in the table below.
以上述べたように本発明によれば、溶融してポリブロピ
レンレジンを冷却ロールに押圧させてポリプロピレンフ
ィルムを作る場合において、作られたポリプロピレンフ
ィルムは支持ベルトによって無延伸状態で送出されるの
で、ポリプロピレンフィルムに縦方向または横方向の分
子配向が生じず、したがってこのポリプロピレンフィル
ムをラミネートしたラミネートフィルムを素材として包
装袋を作ると、手切れ性に富みかつ落下強度もバランス
の良い強度とすることができる。As described above, according to the present invention, when a polypropylene film is made by pressing a melted polypropylene resin against a cooling roll, the produced polypropylene film is sent out in an unstretched state by a support belt. Polypropylene film does not have molecular orientation in the vertical or horizontal direction, so if a packaging bag is made from a laminate film made by laminating this polypropylene film, it can be easily cut by hand and has a well-balanced drop strength. can.
【図面の簡単な説明】
図面は本発明の無方向性ポリプロピレンフィルムの製造
方法を実施するための製造装置を示す概略図である。
１・・・Ｔダイ、２・・・冷却ロール、３・・・プレス
ロール、４・・・支持ローラ、５・・・支持ベルト、６
・・・ポリプロピレンフィルム。
出願人代理人 佐 藤 −雄
手続補正書
昭和６３年３月１６日
１ 事件の表示
昭和６３年 特許願 第２９４００号
２ 発明の名称
無方向性ポリプロピレンフィルム
の製造方法
３ 補正をする者
事件との関係 特許出願人
株式会社細 川 洋 行
４代理人
■
１、：；、 ３１７
８ 補正の内容
（１） 明細書第４頁第２０行から第５頁第８行の「
また上記冷却ロール・・・巻回してもよい」の記載を下
記の通り補正する。
「この場合フィルム６のロール離れが問題となることが
あるが、スリップ剤や離ロール剤がレジンに添加すれば
ロール離れが良くできる。またスリップ剤や離ロール剤
をレジンに添加するのが通常であるが、性能上の要求か
らスリップ剤を離ロール剤の添加が不可能な時には、無
方向力ポリプロピレンフィルム６のロール離れをよくす
るために、冷却ロール２の表面にテフロン加工を施こし
たロールを用いて作られるべき無方向性ポリプロピレン
フィルム６のロール離れを良くするようにしている。
なお冷却ロール２と別に設けた支持ローラ７゜７との間
には、無端状支持ベルト８を巻回しても良いのはもちろ
んである。」
（２） 明細書第５頁第１１行の「約２６０℃」「約
２８０℃」訂正する。
（３） 明細書第５頁第１６行「支持ベルト４」を「
支持ベルト５」に訂正する。BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a schematic diagram showing a manufacturing apparatus for carrying out the method for manufacturing a non-oriented polypropylene film of the present invention. DESCRIPTION OF SYMBOLS 1... T die, 2... Cooling roll, 3... Press roll, 4... Support roller, 5... Support belt, 6
...Polypropylene film. Applicant's agent: Sato - Oo Procedural Amendment March 16, 1988 1 Indication of the case 1988 Patent Application No. 29400 2 Name of the invention Process for manufacturing non-oriented polypropylene film 3 Person making the amendment Related: Patent Applicant Hiroshi Hosokawa Co., Ltd. 4 Agent ■ 1, :;, 317 8 Contents of amendment (1) From page 4, line 20 of the specification to page 5, line 8, “
In addition, the statement "The cooling roll may be wound" is amended as follows. ``In this case, roll separation of the film 6 may be a problem, but if a slip agent or roll release agent is added to the resin, the roll separation can be improved.Additionally, it is common to add a slip agent or roll release agent to the resin. However, when it is impossible to add a slip agent or a roll release agent due to performance requirements, the surface of the cooling roll 2 is treated with Teflon in order to improve the roll separation of the non-directional force polypropylene film 6. The roll separation of the non-oriented polypropylene film 6 to be produced using a roll is improved.An endless support belt 8 is wound between the cooling roll 2 and a separately provided support roller 7. (2) Correct "approximately 260°C" and "approximately 280°C" on page 5, line 11 of the specification. (3) Replace “Support belt 4” on page 5, line 16 of the specification with “
Corrected to ``Support Belt 5''.
Claims (1)
乗せて冷却ロールまで送り、冷却ロールに対向配置した
プレスロールで支持ベルトに乗った溶融ポリプロピレン
レジンを冷却ロールに押圧させ、形成されたポリプロピ
レンフィルムを支持ベルトによって無延伸状態で送出す
ようにしたことを特徴とする無方向性ポリプロピレンフ
ィルムの製造方法。The molten polypropylene resin is placed on one side of the support belt and sent to a cooling roll, and a press roll placed opposite the cooling roll presses the molten polypropylene resin on the support belt against the cooling roll, and the formed polypropylene film is transferred to the support belt. A method for producing a non-oriented polypropylene film, characterized in that the film is sent out in an unstretched state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63029400A JP2510654B2 (en) | 1988-02-10 | 1988-02-10 | Method for producing non-oriented polypropylene film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63029400A JP2510654B2 (en) | 1988-02-10 | 1988-02-10 | Method for producing non-oriented polypropylene film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01204716A true JPH01204716A (en) | 1989-08-17 |
| JP2510654B2 JP2510654B2 (en) | 1996-06-26 |
Family
ID=12275091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63029400A Expired - Lifetime JP2510654B2 (en) | 1988-02-10 | 1988-02-10 | Method for producing non-oriented polypropylene film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2510654B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0482518A2 (en) * | 1990-10-23 | 1992-04-29 | Idemitsu Petrochemical Co., Ltd. | Process for production of polypropylene sheets or films |
| US5295805A (en) * | 1990-03-02 | 1994-03-22 | Ryoka Techno Engineering & Construction Co. | Rotating cylindrical treatment apparatus |
| EP0614748A1 (en) * | 1993-03-04 | 1994-09-14 | Idemitsu Petrochemical Co., Ltd. | Method for producing thermoplastic resin sheet or film |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56121736A (en) * | 1980-02-29 | 1981-09-24 | Matsushita Electric Works Ltd | Manufacture of film for transferring rough surface |
| JPS6360726A (en) * | 1986-09-01 | 1988-03-16 | Toppan Printing Co Ltd | Manufacture of highly transparent plastic film or sheet |
-
1988
- 1988-02-10 JP JP63029400A patent/JP2510654B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56121736A (en) * | 1980-02-29 | 1981-09-24 | Matsushita Electric Works Ltd | Manufacture of film for transferring rough surface |
| JPS6360726A (en) * | 1986-09-01 | 1988-03-16 | Toppan Printing Co Ltd | Manufacture of highly transparent plastic film or sheet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5295805A (en) * | 1990-03-02 | 1994-03-22 | Ryoka Techno Engineering & Construction Co. | Rotating cylindrical treatment apparatus |
| EP0482518A2 (en) * | 1990-10-23 | 1992-04-29 | Idemitsu Petrochemical Co., Ltd. | Process for production of polypropylene sheets or films |
| EP0614748A1 (en) * | 1993-03-04 | 1994-09-14 | Idemitsu Petrochemical Co., Ltd. | Method for producing thermoplastic resin sheet or film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2510654B2 (en) | 1996-06-26 |
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