JP2005289000A - Thermoplastic resin sheet, its manufacturing method, and processing device - Google Patents

Thermoplastic resin sheet, its manufacturing method, and processing device Download PDF

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JP2005289000A
JP2005289000A JP2004111210A JP2004111210A JP2005289000A JP 2005289000 A JP2005289000 A JP 2005289000A JP 2004111210 A JP2004111210 A JP 2004111210A JP 2004111210 A JP2004111210 A JP 2004111210A JP 2005289000 A JP2005289000 A JP 2005289000A
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thermoplastic resin
transfer roll
sheet
transfer
mold
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Keiji Koizumi
惠司 小泉
Yukinobu Shimamoto
幸展 嶋本
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Kaneka Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32Component parts, details or accessories; Auxiliary operations
    • B29C43/44Compression means for making articles of indefinite length
    • B29C43/46Rollers
    • B29C2043/461Rollers the rollers having specific surface features
    • B29C2043/463Rollers the rollers having specific surface features corrugated, patterned or embossed surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32Component parts, details or accessories; Auxiliary operations
    • B29C43/44Compression means for making articles of indefinite length
    • B29C43/48Endless belts
    • B29C2043/486Endless belts cooperating with rollers or drums

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  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a processing device and its manufacturing method for a thermoplastic resin sheet which can economically and stably manufacture the thermoplastic resin sheet on which a fine pattern is transferred at a high speed, and to provide the thermoplastic resin sheet obtained by them. <P>SOLUTION: The fine pattern is transferred to the surface of the thermoplastic resin by continuously feeding the thermoplastic resin under a molten state from an extruder in a space between a roll and an endless belt having a cooling means which can be controlled to a temperature being at a glass transition temperature or higher of the thermoplastic resin, at least one of which has a surface being minutely worked. Then, the thermoplastic resin sheet after being separated from the transfer roll is quickly cooled by the cooling means which is provided in such a manner that the thermoplastic resin sheet can be cooled from the outside. Thus, the thermoplastic resin sheet on which the fine pattern has been transferred can stably and economically be manufactured at a high rate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、熱可塑性樹脂シートの加工装置、該シートの製造方法および、得られる熱可塑性樹脂シートに関する。詳しくは、熱可塑性樹脂を成型する際に微細模様を付与する加工装置、微細模様を付与する製造方法、および微細模様が加工されたシートに関する。   The present invention relates to a thermoplastic resin sheet processing apparatus, a method for producing the sheet, and a thermoplastic resin sheet to be obtained. More specifically, the present invention relates to a processing apparatus that gives a fine pattern when molding a thermoplastic resin, a manufacturing method that gives a fine pattern, and a sheet on which the fine pattern is processed.

微細模様シートとしては、シート表面に数百μm〜数十μmまでの微細な加工が要求されるようになってきた。微細加工を施したシートの製造方法として、連続プレス法(特許文献1参照)、ベルト法(特許文献2参照)、ロール法(特許文献2参照)等が挙げられる。   As a fine pattern sheet, fine processing of several hundred μm to several tens μm has been required on the sheet surface. Examples of a method for producing a finely processed sheet include a continuous press method (see Patent Document 1), a belt method (see Patent Document 2), a roll method (see Patent Document 2), and the like.

連続プレス法は、ベルト上に重ね合わされて連続的に供給される固相のシート材料に対して、加熱または冷却機能を有する複数のプレス手段で微細模様パターン形成用の型を順に押し当てて型をシートに転写させる製造方法である。しかしながら、この方法であると、型を押し当てる工程がバッチ方式で行われるため、金型は、一旦シートをガラス転移温度に上げて、金型で微細模様を反転し、その後冷却するまで、金型を押し付けた状態で金型を冷却し、金型を開放する事でシートに微細模様を形作る。この為、金型が複数面必要で、且つ熱容量の大きな金型を加熱冷却する為、時間がかかり、金型が複雑な構造となる事になる。この為、生産速度が遅く、また、装置が複雑で大型煩雑になるという欠点があった。   In the continuous pressing method, a mold for forming a fine pattern pattern is sequentially pressed by a plurality of pressing means having a heating or cooling function against a solid-phase sheet material that is continuously supplied while being superimposed on a belt. Is a manufacturing method for transferring the material to a sheet. However, in this method, since the process of pressing the mold is performed in a batch system, the mold is temporarily raised to the glass transition temperature, the fine pattern is inverted by the mold, and then the mold is cooled until cooled. The mold is cooled with the mold pressed, and a fine pattern is formed on the sheet by opening the mold. For this reason, a plurality of molds are required, and a mold having a large heat capacity is heated and cooled, so that it takes time and the mold has a complicated structure. For this reason, the production speed is slow, and the apparatus is complicated and large and complicated.

ベルト法によれば、ベルトを支えるロールが固定されている為、圧力を加える時間を変更することが出来ず、いわゆる生産における応用性に乏しい欠点がある。ベルト法は、微細模様パターンの型を有するベルトと熱可塑性樹脂とを一対のローラ同士で挟んでプレスすることにより型を熱可塑性樹脂に転写させる製造方法である。   According to the belt method, since the roll for supporting the belt is fixed, the time for applying pressure cannot be changed, and there is a drawback that the applicability in so-called production is poor. The belt method is a manufacturing method in which a mold having a fine pattern pattern and a thermoplastic resin are sandwiched between a pair of rollers and pressed to transfer the mold to the thermoplastic resin.

また、ロール法によれば、外周面に微細模様パターンの型が形成されたロールを使用してその型を熱可塑性樹脂に転写させるために、ロールを一旦ガラス転移温度以上に加熱し、これに加工すべきシートを圧し付けて、従来のバッチ式と異なり生産を連続的に行い、また、型が形成されたベルトが不要なことで耐久性も良好であり、さらに、装置の構造も簡略化でき、装置の小型化も実現できるとされている。   Also, according to the roll method, in order to transfer the mold to a thermoplastic resin using a roll having a fine pattern pattern formed on the outer peripheral surface, the roll is once heated above the glass transition temperature. Unlike the conventional batch type, the sheet to be processed is pressed and production is continuously performed. Also, the durability is good because a belt with a mold is not required, and the structure of the device is simplified. It is said that the device can be downsized.

しかしながら、ベルト法もロール法も、熱可塑性樹脂の型への充填不足や、ベルトやロールからの剥離不良を防ぐため、転写が行われる部分では、ベルトやロールを一旦高温にし、剥離が行われる部分では熱可塑性樹脂やベルトやロールを冷却して低温にする必要がある。しかしながら、一つのベルトやロール上では、この2動作を極めて短時間に行う必要があり、加工速度はおのずから遅いものとなってしまった。しかも、これらの方法は、熱可塑性樹脂をシート状に加工し、一旦巻き取って冷却した後、さらに、転写させる必要があるので、生産工程が2工程になって不経済である上に、一旦、熱可塑性樹脂シートを再加熱する必要があるので、エネルギーの無駄等による環境負荷が大きくなる等の大きな欠点を有している。
特開昭56−51320号 特開昭59−140021号
However, in both the belt method and the roll method, in order to prevent insufficient filling of the thermoplastic resin into the mold and poor peeling from the belt or roll, the belt or roll is once heated to a high temperature at the portion where transfer is performed. In the part, it is necessary to cool the thermoplastic resin, belt or roll to a low temperature. However, it is necessary to perform these two operations in a very short time on one belt or roll, and the processing speed is naturally slow. Moreover, these methods require processing the thermoplastic resin into a sheet, winding it once, cooling it, and further transferring it, so that the production process becomes two steps and is uneconomical. Further, since it is necessary to reheat the thermoplastic resin sheet, the thermoplastic resin sheet has major disadvantages such as an increased environmental load due to waste of energy.
JP 56-51220 A JP 59-140021

本発明の目的は、微細模様を転写した熱可塑性樹脂シートを経済的、高速で安定して生産できる熱可塑性樹脂シートの加工装置および製造方法、および、微細模様を転写された熱可塑性樹脂シートを提供することにある。   An object of the present invention is to provide a thermoplastic resin sheet processing apparatus and manufacturing method capable of economically and stably producing a thermoplastic resin sheet to which a fine pattern is transferred, and a thermoplastic resin sheet to which a fine pattern is transferred. It is to provide.

本発明者らは、鋭意検討を重ねた結果、熱可塑性樹脂のガラス転移温度近傍の温度に制御可能な冷却手段を有する、少なくとも一方が細密加工された表面を持つ転写ロールおよびエンドレスベルトの間に、押出機から連続して溶融状態の熱可塑性樹脂を供給するして熱可塑性樹脂の表面に微細模様を転写し、転写ロールから剥離後の熱可塑性樹脂シートを外部から冷却可能に設けられた冷却手段により急速冷却することにより、微細模様が転写された熱可塑性樹脂シートを高速で安定的かつ経済的に生産できることを見出し、本発明に至った。   As a result of intensive studies, the present inventors have a cooling means that can be controlled to a temperature in the vicinity of the glass transition temperature of the thermoplastic resin, and between the transfer roll and the endless belt, at least one of which has a finely processed surface. Cooling provided so that the molten thermoplastic resin is continuously supplied from the extruder to transfer the fine pattern onto the surface of the thermoplastic resin, and the thermoplastic resin sheet after peeling from the transfer roll can be cooled from the outside. By rapidly cooling by means, it was found that a thermoplastic resin sheet having a fine pattern transferred thereon can be produced stably at high speed and economically, and the present invention has been achieved.

すなわち、本発明は、
熱可塑性樹脂への転写用の型が形成された転写ロールおよび、熱可塑性樹脂の裏面から加圧するベルト装置を配置し、かつ、前記転写ロールおよび前記ベルト装置が両者に付着した状態の前記熱可塑性樹脂を冷却可能に設けられた冷却手段を有し、さらに、転写ロールから剥離したシートを外側から冷却可能に冷却手段とを含んで構成されていることを特徴とする熱可塑性樹脂シートの加工装置(請求項1)、
転写ロールの転写用の型が微細模様に加工されたものであり、ベルト装置の熱可塑性樹脂との接触面が鏡面状に加工されたものであることを特徴とする請求項1に記載の熱可塑性樹脂シートの加工装置(請求項2)、
転写ロールの転写用の型が鏡面状に加工されたものであり、ベルト装置の熱可塑性樹脂との接触面が微細模様に加工されたものであることを特徴とする請求項1に記載の熱可塑性樹脂シートの加工装置(請求項3)、
転写ロールの転写用の型微細模様に加工されたものであり、ベルト装置の熱可塑性樹脂との接触面が微細模様に加工されたものであることを特徴とする請求項1に記載の熱可塑性樹脂シートの加工装置(請求項4)、
冷却可能に設けられた冷却手段を有する、熱可塑性樹脂への転写用の型が形成された転写ロールおよび熱可塑性樹脂の裏面から圧縮するベルト装置の間へ、溶融状態の熱可塑性樹脂を供給して、熱可塑性樹脂に前記転写ロールの型を転写しつつ、転写された熱可塑性樹脂を転写ロールおよびベルト装置により冷却し、さらに、転写ロールから剥離したシートを外側から冷却可能に設けられた冷却手段により冷却した後に巻き取ることを特徴とする熱可塑性樹脂シートの製造方法(請求項5)、および
冷却可能に設けられた冷却手段を有する、熱可塑性樹脂への転写用の型が形成された転写ロールおよび熱可塑性樹脂の裏面から圧縮するベルト装置の間へ、溶融状態の熱可塑性樹脂を供給して、熱可塑性樹脂に前記転写ロールの型を転写しつつ、転写された熱可塑性樹脂を転写ロールおよびベルト装置により冷却し、さらに、転写ロールから剥離したシートを外側から冷却可能に設けられた冷却手段により冷却した後に巻き取ることにより得られることを特徴とする熱可塑性樹脂シート(請求項6)
に関する。
That is, the present invention
The thermoplastic resin in which a transfer roll on which a mold for transfer to a thermoplastic resin is formed and a belt device that pressurizes from the back surface of the thermoplastic resin are disposed, and the transfer roll and the belt device are attached to both. An apparatus for processing a thermoplastic resin sheet, comprising: cooling means provided so that the resin can be cooled; and further comprising cooling means capable of cooling the sheet peeled off from the transfer roll from the outside. (Claim 1),
2. The heat according to claim 1, wherein the transfer mold of the transfer roll is processed into a fine pattern, and the contact surface of the belt device with the thermoplastic resin is processed into a mirror surface. Processing device for plastic resin sheet (claim 2),
2. The heat according to claim 1, wherein the transfer mold of the transfer roll is processed into a mirror shape, and the contact surface of the belt device with the thermoplastic resin is processed into a fine pattern. Plastic resin sheet processing device (Claim 3),
2. The thermoplastic resin according to claim 1, wherein the thermoplastic resin is processed into a fine pattern for transfer of the transfer roll, and the contact surface of the belt device with the thermoplastic resin is processed into a fine pattern. Resin sheet processing device (Claim 4),
A molten thermoplastic resin is supplied between a transfer roll having a cooling means provided so as to be capable of being cooled and a belt roll that compresses from a transfer roll on which a mold for transfer to the thermoplastic resin is formed and a back surface of the thermoplastic resin. Then, while transferring the mold of the transfer roll to the thermoplastic resin, the transferred thermoplastic resin is cooled by the transfer roll and the belt device, and the sheet peeled off from the transfer roll is further cooled from the outside. A method for producing a thermoplastic resin sheet that is wound after being cooled by means (Claim 5), and a mold for transfer to a thermoplastic resin having cooling means provided so as to be cooled are formed. While supplying the molten thermoplastic resin between the transfer roll and the belt device that compresses from the back surface of the thermoplastic resin, the mold of the transfer roll is transferred to the thermoplastic resin. The transferred thermoplastic resin is cooled by a transfer roll and a belt device, and further, the sheet peeled from the transfer roll is cooled by a cooling means provided so that it can be cooled from the outside, and then wound up, and is obtained. Thermoplastic resin sheet (Claim 6)
About.

本発明の熱可塑性樹脂のシート加工装置は、熱可塑性樹脂への転写用の型が形成された転写ロールおよび、熱可塑性樹脂の裏面から圧縮するベルト装置を配置し、かつ、前記転写ロールおよび前記ベルト装置が両者に付着した状態の前記熱可塑性樹脂を冷却可能に設けられた冷却手段を有し、さらに、転写ロールから剥離したシートを外側から冷却可能に冷却手段とを含んで構成されていることを特徴とする熱可塑性樹脂のシート加工装置である。   The thermoplastic resin sheet processing apparatus of the present invention includes a transfer roll on which a mold for transfer to a thermoplastic resin is formed, a belt device that compresses from the back surface of the thermoplastic resin, and the transfer roll and the The belt device has a cooling means provided so as to be able to cool the thermoplastic resin adhered to both, and further includes a cooling means capable of cooling the sheet peeled off from the transfer roll from the outside. This is a sheet processing apparatus for thermoplastic resin.

本発明における転写ロールは、その表面に熱可塑性樹脂への転写用の型が形成された筒体であり、冷却制御可能な冷却手段、詳しくは、その内部に熱媒を導入する機構を有し、転写ロールの表面温度を熱可塑性樹脂のガラス転移温度近傍またはそれ以上の温度に冷却制御することが可能である。   The transfer roll in the present invention is a cylinder having a mold for transfer to a thermoplastic resin formed on the surface thereof, and has a cooling means capable of cooling control, specifically, a mechanism for introducing a heat medium therein. It is possible to control the cooling of the surface temperature of the transfer roll to a temperature near or above the glass transition temperature of the thermoplastic resin.

本発明における熱可塑性樹脂の裏面から圧縮するベルト装置は、エンドレスベルト、一対のエンドレス支持ロールおよび少なくとも1つのエンドレスベルト張力調整ロールからなるもので、エンドレスベルトの熱可塑性樹脂との接触面には転写用の型が形成されている。また、ベルト装置は、一対のエンドレスベルト支持ロールの内部に熱媒を導入して温度制御することにより、間接的にエンドレスベルトの表面温度を熱可塑性樹脂のガラス転移温度近傍またはそれ以上の温度に冷却制御することが可能である。   The belt device for compressing from the back surface of the thermoplastic resin according to the present invention comprises an endless belt, a pair of endless support rolls and at least one endless belt tension adjusting roll, and is transferred onto the contact surface of the endless belt with the thermoplastic resin. A mold is formed. In addition, the belt device indirectly controls the surface temperature of the endless belt to a temperature near or above the glass transition temperature of the thermoplastic resin by introducing a heat medium into the pair of endless belt support rolls and controlling the temperature. Cooling control is possible.

本発明においては、一対のエンドレス支持ロールと転写ロールとの間隔の調整、およびエンドレス張力調整ロールの位置の調整により、エンドレスベルトの接触面積および張力(加圧される力)を調整することでき、熱可塑性樹脂への転写用の型の転写効率および冷却効率を向上されることができる。詳しくは、エンドレスベルトの押す時間は、内側に設けた一対のエンドレスベルト支持ロールの間隔を広げることにより、転写ロールとシートが接触する面積を大きく(時間を長く)することができる。また、エンドレスベルトの張力は、エンドレスベルト張力調整ロールの位置をエンドレスベルト支持ロールから離すことにより、その張力(加圧される力)を増加させ、シートを転写ロールに強く押し付けることができる。   In the present invention, the contact area and tension (pressed force) of the endless belt can be adjusted by adjusting the distance between the pair of endless support rolls and the transfer roll and adjusting the position of the endless tension adjusting roll. The transfer efficiency and cooling efficiency of the mold for transfer to the thermoplastic resin can be improved. Specifically, the pressing time of the endless belt can increase the area where the transfer roll and the sheet come into contact (longer time) by widening the interval between the pair of endless belt support rolls provided inside. Further, the tension of the endless belt can be increased by increasing the tension (force applied) by separating the position of the endless belt tension adjusting roll from the endless belt supporting roll, and the sheet can be strongly pressed against the transfer roll.

また、本発明のシート加工装置では、転写ロールおよびエンドレスベルトの両面で転写を行ってよい。この際、転写用の型としては、鏡面状や微細模様面状のものが適用され、型を鏡面状とした場合には、シートに光沢面が転写され、微細模様面状とした場合には、シートに微細模様の反転形状が付与されるようになる。なお、本発明の微細模様は、特に限定されない。   In the sheet processing apparatus of the present invention, transfer may be performed on both sides of the transfer roll and the endless belt. At this time, as the transfer mold, a mirror surface or a fine pattern surface is applied. When the mold is a mirror surface, the glossy surface is transferred to the sheet, and when the pattern is a fine pattern surface. Then, the reverse shape of the fine pattern is given to the sheet. The fine pattern of the present invention is not particularly limited.

本発明における転写ロールおよびベルト装置による冷却条件に関しては、熱可塑性樹脂のガラス転移温度近傍、またはそれ以上には保持するものではあるが、転写ロールまたはエンドレスベルトにおいて、微細模様を加工した型を有する側の表面温度を、もう一方の表面温度よりも5℃以上温度を高く制御することが好ましい。また、転写ロールおよびエンドレスベルトの両方が微細模様の型を有する場合、より微細な模様を施した型を有する方の表面温度を5℃以上高く制御することが好ましい。   As for the cooling condition by the transfer roll and belt device in the present invention, it is maintained near or above the glass transition temperature of the thermoplastic resin, but the transfer roll or endless belt has a mold with a fine pattern processed. It is preferable to control the surface temperature on the side higher by 5 ° C. or more than the other surface temperature. When both the transfer roll and the endless belt have a fine pattern mold, it is preferable to control the surface temperature of the mold having a finer pattern higher by 5 ° C. or more.

本発明のシート加工装置では、転写ロールから剥離した熱可塑性樹脂シートに対して、外側から冷却可能な冷却手段を含んでいる。その冷却手段としては、冷却エアーを噴出するチャンバー、温度制御された水槽、冷却水を霧状に噴霧するノズル等があげられる。前記冷却手段により、剥離後の熱可塑性樹脂シートを巻き取り可能な温度以下に冷却することにより、巻き取り機によりシートを巻き取っても、微細模様が崩れないシートを得ることができる。   In the sheet processing apparatus of this invention, the cooling means which can be cooled from the outer side is included with respect to the thermoplastic resin sheet peeled from the transfer roll. Examples of the cooling means include a chamber for ejecting cooling air, a temperature-controlled water tank, and a nozzle for spraying cooling water in a mist form. By cooling the peeled thermoplastic resin sheet to a temperature that can be taken up or less by the cooling means, a sheet that does not collapse the fine pattern can be obtained even if the sheet is taken up by a winder.

なお、本発明においては、溶融状態の熱可塑性樹脂を転写ロールおよびエンドレスベルトの間に供給する前工程として、シート押出用成形機およびそれに接続されたダイスを設置し、ダイスからシート状に押出された溶融状態の樹脂を供給することが好ましい。   In the present invention, as a pre-process for supplying the molten thermoplastic resin between the transfer roll and the endless belt, a sheet extrusion molding machine and a die connected thereto are installed and extruded from the die into a sheet. It is preferable to supply a molten resin.

本発明の熱可塑性樹脂のシート加工装置によれば、従来のように転写ロールまたはエンドレスベルトを一旦加熱することなくとも、シート状にダイスから押出された溶融状態の熱可塑性樹脂は、融点以下ガラス転移温度以上の温度に冷却制御された微細模様に表面加工された転写ロールまたはエンドレスベルトによって冷却されつつ、微細模様が転写され、さらに、別工程で設けた冷却手段によりシートを冷却された後に巻き取り機で巻き取られることにより、巻き取り機で巻き取っても微細模様の崩れのないシートが得られる。この為、高速で安定した生産ができる。   According to the thermoplastic resin sheet processing apparatus of the present invention, a thermoplastic resin in a molten state extruded from a die into a sheet shape is glass having a melting point or lower, without once heating a transfer roll or an endless belt as in the prior art. The fine pattern is transferred while being cooled by a transfer roll or endless belt that is surface-processed into a fine pattern that is controlled to be cooled to a temperature higher than the transition temperature, and then the sheet is cooled after being cooled by a cooling means provided in a separate process. By being wound up by a winder, a sheet that does not collapse a fine pattern can be obtained even when wound by a winder. For this reason, high-speed and stable production is possible.

また、本発明の熱可塑性樹脂シートの製造方法は、前述の熱可塑性樹脂シートの加工装置を用いてシートを製造する方法である。   Moreover, the manufacturing method of the thermoplastic resin sheet of this invention is a method of manufacturing a sheet | seat using the processing apparatus of the above-mentioned thermoplastic resin sheet.

以下に、転写ロールの転写用の型に微細模様を加工した場合を例に、図1を用いて説明するが、これに限定されるものではない。   Hereinafter, a case where a fine pattern is processed on a transfer mold of a transfer roll will be described as an example with reference to FIG. 1, but the present invention is not limited to this.

具体的には、熱可塑性樹脂はシート押出用成形機10で加熱溶融混練され、すなわち、押出機シリンダーに装備されたヒータで加熱されスクリューで混練され、せん断を受けながら、発熱、均一化され、ダイス11に送られ、ダイス11にて、装備されたヒータにより溶融状態を保ちながら、所定のシート厚みに押出形成される。   Specifically, the thermoplastic resin is heated and melted and kneaded by the sheet extrusion molding machine 10, that is, heated by a heater equipped in the extruder cylinder and kneaded by a screw, subjected to shearing, heat generation and homogenization, It is sent to the die 11, and the die 11 is extruded and formed to a predetermined sheet thickness while maintaining a molten state by the equipped heater.

ダイス11を出た溶融状態の熱可塑性樹脂は、微細模様加工した転写用の型を有する転写ロール20および、シートを裏面から転写ロール20側に加圧するエンドレスベルト40の間に導かれる。なお、転写ロール20およびエンドレスベルト40は、内部に熱媒を導入して冷却されるが、その表面温度をガラス転移温度近傍、またはそれは以上に保持される。この際、転写ロール20は、内部に熱媒を導入して冷却される。また、エンドレスベルト40は、回転に用いる1対のエンドレスベルト支持ロール内に熱媒を導入して冷却される。エンドレスベルト40を転写ロール20に押し付ける一対のエンドレスベルト支持ロール30および33は、微細模様加工を施した転写用の型を有する転写ロール20に相対峙してその間隔を可変することができ、シートを挟んで任意の時間適度に押し付ける役割をはたし、転写ロール20の円周に沿って距離をとることによりエンドレスベルト40がシート15の微細模様転写側とは異なる面を押す面積を増加することができ、熱可塑性樹脂シートへの微細模様の転写効率およびシートの冷却効率が上昇する。エンドレスベルト張力調整ロール31は、可動式になっており、エンドレスベルト支持ロール30および33から距離をとることによりで、エンドレスベルト40の張力を上げ、転写ロール20にシート15を強く押し付けることとなる。また、逆に、エンドレスベルト張力調整ロール31をエンドレスベルト支持ロール30および33から距離を近づけることにより、エンドレスベルト40の張力を下げ、転写ロール20にシート15を弱く押し付けることとなる。   The molten thermoplastic resin exiting the die 11 is guided between a transfer roll 20 having a transfer pattern processed with a fine pattern and an endless belt 40 that pressurizes the sheet from the back surface to the transfer roll 20 side. The transfer roll 20 and the endless belt 40 are cooled by introducing a heat medium therein, but the surface temperature thereof is maintained near the glass transition temperature or higher. At this time, the transfer roll 20 is cooled by introducing a heat medium therein. Further, the endless belt 40 is cooled by introducing a heat medium into a pair of endless belt support rolls used for rotation. A pair of endless belt support rolls 30 and 33 for pressing the endless belt 40 against the transfer roll 20 can be opposed to the transfer roll 20 having a transfer mold subjected to fine pattern processing, and the interval thereof can be varied. The endless belt 40 increases the area where the endless belt 40 presses a surface different from the fine pattern transfer side of the sheet 15 by taking a distance along the circumference of the transfer roll 20. The transfer efficiency of the fine pattern onto the thermoplastic resin sheet and the cooling efficiency of the sheet are increased. The endless belt tension adjusting roll 31 is movable, and by increasing the distance from the endless belt support rolls 30 and 33, the tension of the endless belt 40 is increased and the sheet 15 is strongly pressed against the transfer roll 20. . Conversely, the endless belt tension adjusting roll 31 is brought closer to the endless belt support rolls 30 and 33 to lower the tension of the endless belt 40 and press the sheet 15 weakly against the transfer roll 20.

更に、転写ロールから剥離された熱可塑性樹脂シートは、冷却されたエアーをシートに噴出すチャンバー70により冷却され、巻き取った際に微細模様が崩れない温度まで冷却されたシート60となり、巻き取り機80で巻き取られる。   Furthermore, the thermoplastic resin sheet peeled off from the transfer roll is cooled by a chamber 70 that ejects cooled air onto the sheet, and becomes a sheet 60 that is cooled to a temperature at which the fine pattern does not collapse when wound up. It is wound up by a machine 80.

また、図2には、微細加工を施された転写用の型を、転写用ロールの代わりに、エンドレスベルトに用いた系でのシート加工装置を示す。   FIG. 2 shows a sheet processing apparatus in a system in which a finely processed transfer mold is used as an endless belt instead of a transfer roll.

また、本発明の熱可塑性樹脂シートは、前述の熱可塑性樹脂シートの加工装置、および熱可塑性樹脂シートの製造方法によって得られるものである。   In addition, the thermoplastic resin sheet of the present invention is obtained by the above-described thermoplastic resin sheet processing apparatus and thermoplastic resin sheet manufacturing method.

なお、熱可塑性樹脂の具体的樹脂は特に限定されない。例えば、ポリプロピレン(PP)、ポリエチレンテレフタレート(PET)等の結晶性樹脂、およびポリ塩化ビニール(PVC)、ポリカーボネート(PC)、アクリル樹脂(PMMA等)、ポリスチレン(PS)、ポリアリレート樹脂(PAR)、透明アクリロニトリルブタジエンスチレン(ABS)、透明ポリカーボネート/ポリエステル(PC/PET)等の非晶性樹脂が用いられる。   In addition, the specific resin of a thermoplastic resin is not specifically limited. For example, crystalline resins such as polypropylene (PP) and polyethylene terephthalate (PET), and polyvinyl chloride (PVC), polycarbonate (PC), acrylic resins (PMMA, etc.), polystyrene (PS), polyarylate resin (PAR), Amorphous resins such as transparent acrylonitrile butadiene styrene (ABS) and transparent polycarbonate / polyester (PC / PET) are used.

転写ロールに微細模様を加工した型を用いる系での熱可塑性樹脂シートの加工装置。An apparatus for processing a thermoplastic resin sheet in a system using a mold in which a fine pattern is processed on a transfer roll. エンドレスベルトに微細模様を加工した型を用いる系での熱可塑性樹脂シートの加工装置。Processing equipment for thermoplastic resin sheets in a system that uses a mold with a fine pattern processed on an endless belt.

符号の説明Explanation of symbols

10 シート用押出成形機
11 T型ダイス
15 溶融状態の熱可塑性樹脂
20 転写ロール
30 エンドレスベルト支持ロール
31 エンドレスベルト張力調整ロール
32 冷却機
33 エンドレスベルト支持ロール
40 エンドレスベルト
51 温調機
60 シート状樹脂
70 エアチャンバー
80 巻き取り機
DESCRIPTION OF SYMBOLS 10 Sheet extrusion machine 11 T type die 15 Molten thermoplastic resin 20 Transfer roll 30 Endless belt support roll 31 Endless belt tension adjustment roll 32 Cooling machine 33 Endless belt support roll 40 Endless belt 51 Temperature controller 60 Sheet-like resin 70 Air chamber 80 Winder

Claims (6)

熱可塑性樹脂への転写用の型が形成された転写ロールおよび、熱可塑性樹脂の裏面から加圧するベルト装置を配置し、かつ、前記転写ロールおよび前記ベルト装置が両者に付着した状態の前記熱可塑性樹脂を冷却可能に設けられた冷却手段を有し、さらに、転写ロールから剥離したシートを外側から冷却可能に冷却手段とを含んで構成されていることを特徴とする熱可塑性樹脂シートの加工装置。   The thermoplastic resin in which a transfer roll on which a mold for transfer to a thermoplastic resin is formed and a belt device that pressurizes from the back surface of the thermoplastic resin are disposed, and the transfer roll and the belt device are attached to both. An apparatus for processing a thermoplastic resin sheet, comprising: cooling means provided so that the resin can be cooled; and further comprising cooling means capable of cooling the sheet peeled off from the transfer roll from the outside. . 転写ロールの転写用の型が微細模様に加工されたものであり、ベルト装置の熱可塑性樹脂との接触面が鏡面状に加工されたものであることを特徴とする請求項1に記載の熱可塑性樹脂シートの加工装置。   2. The heat according to claim 1, wherein the transfer mold of the transfer roll is processed into a fine pattern, and the contact surface of the belt device with the thermoplastic resin is processed into a mirror surface. Plastic resin sheet processing equipment. 転写ロールの転写用の型が鏡面状に加工されたものであり、ベルト装置の熱可塑性樹脂との接触面が微細模様に加工されたものであることを特徴とする請求項1に記載の熱可塑性樹脂シートの加工装置。   2. The heat according to claim 1, wherein the transfer mold of the transfer roll is processed into a mirror shape, and the contact surface of the belt device with the thermoplastic resin is processed into a fine pattern. Plastic resin sheet processing equipment. 転写ロールの転写用の型が微細模様に加工されたものであり、ベルト装置の熱可塑性樹脂との接触面が微細模様に加工されたものであることを特徴とする請求項1に記載の熱可塑性樹脂シートの加工装置。   2. The heat according to claim 1, wherein the transfer mold of the transfer roll is processed into a fine pattern, and the contact surface of the belt device with the thermoplastic resin is processed into a fine pattern. Plastic resin sheet processing equipment. 冷却可能に設けられた冷却手段を有する、熱可塑性樹脂への転写用の型が形成された転写ロールおよび熱可塑性樹脂の裏面から圧縮するベルト装置の間へ、溶融状態の熱可塑性樹脂を供給して、熱可塑性樹脂に前記転写ロールの型を転写しつつ、転写された熱可塑性樹脂を転写ロールおよびベルト装置により冷却し、さらに、転写ロールから剥離したシートを外側から冷却可能に設けられた冷却手段により冷却した後に巻き取ることを特徴とする熱可塑性樹脂シートの製造方法。   A molten thermoplastic resin is supplied between a transfer roll having a cooling means provided so as to be capable of being cooled and a belt roll that compresses from a transfer roll on which a mold for transfer to the thermoplastic resin is formed and a back surface of the thermoplastic resin. Then, while transferring the mold of the transfer roll to the thermoplastic resin, the transferred thermoplastic resin is cooled by the transfer roll and the belt device, and the sheet peeled off from the transfer roll is further cooled from the outside. A method for producing a thermoplastic resin sheet, comprising winding after cooling by means. 冷却可能に設けられた冷却手段を有する、熱可塑性樹脂への転写用の型が形成された転写ロールおよび熱可塑性樹脂の裏面から圧縮するベルト装置の間へ、溶融状態の熱可塑性樹脂を供給して、熱可塑性樹脂に前記転写ロールの型を転写しつつ、転写された熱可塑性樹脂を転写ロールおよびベルト装置により冷却し、さらに、転写ロールから剥離したシートを外側から冷却可能に設けられた冷却手段により冷却した後に巻き取ることにより得られることを特徴とする熱可塑性樹脂シート。   A molten thermoplastic resin is supplied between a transfer roll having a cooling means provided so as to be capable of being cooled and a belt roll that compresses from a transfer roll on which a mold for transfer to the thermoplastic resin is formed and a back surface of the thermoplastic resin. Then, while transferring the mold of the transfer roll to the thermoplastic resin, the transferred thermoplastic resin is cooled by the transfer roll and the belt device, and the sheet peeled off from the transfer roll is further cooled from the outside. A thermoplastic resin sheet obtained by winding after cooling by means.
JP2004111210A 2004-04-05 2004-04-05 Thermoplastic resin sheet, its manufacturing method, and processing device Pending JP2005289000A (en)

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