JPH09248855A - Production of thermoplastic mirror surface sheet - Google Patents
Production of thermoplastic mirror surface sheetInfo
- Publication number
- JPH09248855A JPH09248855A JP5911996A JP5911996A JPH09248855A JP H09248855 A JPH09248855 A JP H09248855A JP 5911996 A JP5911996 A JP 5911996A JP 5911996 A JP5911996 A JP 5911996A JP H09248855 A JPH09248855 A JP H09248855A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- resin
- pair
- belts
- layer
- 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ダブルベルト式プ
レス装置を用いる特定の熱可塑性プラスチック鏡面シ−
トの製造方法に関し、特に、ポリカ−ボネ−ト，アクリ
ル系樹脂又はポリ塩化ビニル系樹脂の鏡面光沢を有する
単層シ−ト及び各種多層積層シ−トの製造方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a specific thermoplastic mirror surface sheet using a double belt type press machine.
More particularly, the present invention relates to a method for producing a single layer sheet having a mirror gloss of polycarbonate, an acrylic resin or a polyvinyl chloride resin and various multilayer laminated sheets.
【０００２】[0002]
【従来の技術】従来、ポリカ−ボネ−ト，アクリル系樹
脂又はポリ塩化ビニル系樹脂からなる鏡面シ−トの製造
は、Ｔダイから押出された柔軟な溶融シ−トを、表面が
鏡面に磨き上げられた３本のロ−ルで構成されるポリッ
シング機を用いて、シ−トを挾圧冷却する方法が一般的
に採用されている。2. Description of the Related Art Conventionally, a mirror-like sheet made of polycarbonate, acrylic resin or polyvinyl chloride resin has been manufactured by using a flexible molten sheet extruded from a T-die with a mirror-like surface. A method in which a sheet is pressure-cooled by using a polishing machine composed of three polished rolls is generally adopted.
【０００３】この方法は、例えば、直径が250〜450mm程
度の表面が鏡面加工された３本のロ−ルの２ヵ所の間隙
において、シ−ト押圧力が30〜50kgf/cm2 程度で、ロ−
ルによるシ−ト引取り速度が 0.5〜８ｍ/minで行われ
る。また、そのロ−ル温度は、樹脂の種類によって異な
るが、一般に、樹脂の軟化温度より20〜50℃高い温度に
設定される。しかし、かかる従来法では、ロ−ルを駆動
させているウォ−ム歯車式減速機のギアの誤差により、
製品の表面に押出し方向に対して垂直方向のギアマ−ク
といわれる縞模様が発生し易く、また、ロ−ル間隙の設
定が困難で、しばしばバンクマ−クが生じたり、更にロ
−ル温度の影響による剥離マ−クや、そりなどが発生し
易いという問題がある。In this method, for example, a sheet pressing force is about 30 to 50 kgf / cm 2 in a gap between two places of three rolls having a diameter of about 250 to 450 mm and whose surface is mirror-finished. Low
The sheet take-off speed is 0.5 to 8 m / min. The roll temperature varies depending on the type of resin, but is generally set to a temperature 20 to 50 ° C. higher than the softening temperature of the resin. However, in such a conventional method, due to the error of the gear of the worm gear type speed reducer that drives the roll,
A striped pattern called a gear mark perpendicular to the extrusion direction is likely to occur on the surface of the product, and it is difficult to set the roll gap, often causing a bank mark, and further increasing the roll temperature. There is a problem that peeling marks and warpage are likely to occur due to the influence.
【０００４】また、本発明者は、さきにダブルベルト式
プレス装置を用いる熱可塑性プラスチック鏡面板の連続
的製造法を開発し、提案した（特開平６−３３９９８７
号公報）。この方法は、熱可塑性プラスチックの鏡面板
の連続的製造方法として有効であるが、ポリカ−ボネ−
トやアクリル系樹脂、あるいはポリ塩化ビニル系樹脂の
シ−トから選択される単層シ−ト並びに、特にこれらの
シ−トを含む積層多層シ−トは鏡面光沢性が劣るという
問題があった。従って、上記樹脂類の鏡面光沢の改善さ
れたシ−トを連続的に製造する方法は、当該技術分野に
おいて強く要望されている事項であった。The inventor of the present invention has also developed and proposed a continuous production method for a thermoplastic mirror surface plate using a double belt type press machine (Japanese Patent Laid-Open No. 6-339987).
Issue). This method is effective as a continuous method for producing a thermoplastic mirror-like plate, but
Sheet, acrylic resin, or polyvinyl chloride resin sheet, and single-layer sheets, and especially laminated multilayer sheets containing these sheets, have a problem of poor specular gloss. It was Therefore, a method for continuously producing a sheet having an improved specular gloss of the above resins has been a strong demand in the technical field.
【０００５】[0005]
【発明が解決しようとする課題】従って、本発明の課題
は、特に、ポリカ−ボネ−ト，アクリル系樹脂，あるい
はポリ塩化ビニル系樹脂のシ−トとから選択される鏡面
光沢性の優れた見栄えのよいシ−ト、特に、多層積層シ
−トを提供することにある。また、本発明の他の技術的
課題は、ダブルベルト式プレス装置を用いて、そのよう
な鏡面光沢を有するエンドレスシ−トを連続的に製造す
る極めて望ましい方法を提供することにある。更に他の
課題は、加熱収縮率の小さい外観の優れた鏡面シ−トを
工業的に有利に提供することにある。SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide an excellent mirror gloss, which is particularly selected from polycarbonate, acrylic resin, or polyvinyl chloride resin sheet. An object of the present invention is to provide a sheet having a good appearance, particularly a multilayer laminated sheet. Another technical object of the present invention is to provide a highly desirable method for continuously producing such an endless sheet having a specular gloss by using a double belt type press. Still another object is to industrially advantageously provide a specular sheet having a small heat shrinkage and an excellent appearance.
【０００６】[0006]
【課題を解決するための手段】本発明者は、上記課題を
解決する方法について試作研究を重ね、実用的に望まし
いポリカ−ボネ−ト，アクリル系樹脂及びポリ塩化ビニ
ル系樹脂のシ−トから選択される鏡面光沢の優れた単層
又は多層積層シ−トの工業的に極めて望ましい連続的製
造方法を見出した。Means for Solving the Problems The inventors of the present invention have conducted trial research on a method for solving the above problems, and have found from practically desirable sheets of polycarbonate, acrylic resin and polyvinyl chloride resin. We have found an industrially highly desirable continuous process for the production of single-layer or multi-layer laminated sheets with excellent specular gloss.
【０００７】すなわち、本発明は、押出機のＴダイから
押出されたポリカ−ボネ−ト，アクリル系樹脂及びポリ
塩化ビニル系樹脂のシ−トから選択される単層又は多層
積層シ−トを、一対のハウジングを備えたダブルベルト
式プレス装置の対向する一対の無端ステンレス鏡面ベル
ト間に加熱ロ−ル側から連続的に送り込み、送り込まれ
た該シ−トを１７０℃から樹脂分解開始温度までの範囲
内の温度に加熱した後、前記一対の無端ステンレス鏡面
ベルトの間隙に挾持される間に、ハウジングにおいて、
対向する両ベルトを２０〜４０kg/cm2の面圧に押圧保持
すると共に、４０〜１００℃の温度に冷却することを特
徴とする熱可塑性プラスチック鏡面シ−トの製造方法を
提供する。That is, the present invention provides a single-layer or multi-layer laminated sheet selected from a sheet of polycarbonate, an acrylic resin and a polyvinyl chloride resin extruded from a T die of an extruder. , A double-belt type press equipped with a pair of housings is continuously fed from a heating roll side between a pair of opposed endless stainless steel mirror surface belts, and the fed sheet is heated from 170 ° C. to a resin decomposition start temperature. After being heated to a temperature within the range of, while being sandwiched in the gap between the pair of endless stainless specular belts, in the housing,
Provided is a method for producing a thermoplastic plastic mirror sheet, characterized in that both opposing belts are pressed and held at a surface pressure of 20 to 40 kg / cm 2 and cooled to a temperature of 40 to 100 ° C.
【０００８】本発明の方法で得られる樹脂シ−トには、
ポリカ−ボネ−ト（ＰＣ），アクリル系樹脂（ＰＭＭ
Ａ）ポリ塩化ビニル系樹脂（ＰＶＣ）の単層シ−ト、又
はこれらの二種以上の複数枚を積層したシ−ト及びこれ
ら単層又は積層シ−トと他の熱可塑性プラスチックシ−
トを組合せた積層シ−トが包含される。ＰＣとしては、
例えば、分子量20,000〜35,000の範囲のものが好都合に
用いられる。また、ＰＭＭＡとしては、例えば、メチル
（メタ）アクリレ−ト，エチル（メタ）アクリレ−ト，
ブチル（メタ）アクリレ−ト及びオクチル（メタ）アク
リレ−トなどの単量体の単独重合体や共重合体類が代表
的に挙げられる。更に、ＰＶＣとしては、塩化ビニルホ
モポリマ−のほか、塩化ビニルを主成分として他の少量
の共重合単量体との共重合体が包含される。The resin sheet obtained by the method of the present invention comprises:
Polycarbonate (PC), acrylic resin (PMM)
A) A single layer sheet of polyvinyl chloride resin (PVC), or a sheet in which a plurality of two or more of these sheets are laminated, and these single layer or laminated sheet and other thermoplastic sheet.
A laminated sheet including a combination of sheets is included. As a PC,
For example, those having a molecular weight in the range of 20,000 to 35,000 are conveniently used. Examples of PMMA include methyl (meth) acrylate, ethyl (meth) acrylate,
Representative examples thereof include homopolymers and copolymers of monomers such as butyl (meth) acrylate and octyl (meth) acrylate. Further, as PVC, in addition to vinyl chloride homopolymer, copolymers containing vinyl chloride as a main component and a small amount of other copolymerizable monomers are included.
【０００９】本発明の方法においては、Ｔダイから押出
された単一樹脂シ−トをそのまゝ、あるいは同時に押し
出された複数枚の溶融状シ−トを、あるいは溶融シ−ト
と他のシ−トを重ね合わせて、ハウジングを備えたダブ
ルベルト式プレス装置の対向する無端ステンレス鏡面ベ
ルト間隙に連続的に送り込まれる。ステンレスベルトが
それぞれ掛回される送込み側の一対のロ−ルは加熱ロ−
ルであって、出口側の一対のロ−ルは冷却ロ−ルであ
る。無端ステンレス鏡面ベルト間に挾持されるシ−ト
は、適切な温度管理のもとに、加熱ロ−ルで加熱押圧さ
れ、取り出される側で冷却されて、光沢性の優れた鏡面
積層シ−トに形成される。In the method of the present invention, a single resin sheet extruded from a T die is kept as it is, or a plurality of molten sheets are extruded at the same time, or a molten sheet and other sheets are melted. The sheets are overlapped and continuously fed into the facing endless stainless steel mirror surface belt gap of the double belt type press equipped with the housing. The pair of rolls on the feeding side around which the stainless steel belts are respectively wound are heating rolls.
The pair of rolls on the outlet side are cooling rolls. The sheet sandwiched between the endless stainless specular belts is heated and pressed by a heating roll under proper temperature control, and cooled on the side to be taken out to give a specular surface layer sheet with excellent gloss. Is formed.
【００１０】ダブルベルト式プレス装置の対向する無端
ステンレス鏡面ベルト間に連続的に送り込まれた単層又
は多層積層状シ−トは、一対の加熱ロ−ルによって170
℃以上、好ましくは、175 ℃から樹脂の分解開始温度ま
での範囲の温度に加熱され、ステンレス鏡面ベルトの間
隙に挾持され移動する間に、一対のハウジングにおい
て、対向する両ベルトを近付けるように20〜40kg/cm2の
面圧に押圧保持されると共に、40〜100 ℃の温度に冷却
される。このように加圧，冷却された積層シ−トは、出
口側の一対の冷却ロ−ルによって充分に冷却され引き取
られる。ダブルベルト式プレス装置をこのように操作す
るとき、Ｔダイから溶融押出されたＰＣ，ＰＡ，ＰＶＣ
などの鏡面単層シ−ト又はそれらのシ−トを含む複数枚
の組合せ鏡面積層シ−トを連続的に形成させることがで
きる。The single-layer or multi-layer laminated sheet continuously fed between the endless stainless steel mirror-finished belts of the double-belt type press machine is heated by a pair of heating rollers.
℃ or more, preferably, to a temperature in the range of 175 ℃ to the decomposition start temperature of the resin, while sandwiching and moving in the gap of the stainless specular belt, in the pair of housings so as to bring both the opposing belts closer to each other. It is pressed and held at a surface pressure of -40 kg / cm 2 and cooled to a temperature of 40-100 ° C. The laminated sheet thus pressurized and cooled is sufficiently cooled by a pair of cooling rolls on the outlet side and taken out. When operating the double belt type press in this way, PC, PA, PVC melt-extruded from the T-die
It is possible to continuously form a mirror surface single layer sheet or a plurality of combined mirror area layer sheets including those sheets.
【００１１】積層状シ−トの加熱温度が、170 ℃未満で
は、満足し得る鏡面光沢が得られないし、樹脂分解温度
を超えると、得られるシ−トの物性が低下するので不都
合である。好ましい加熱温度は、170 〜200 ℃の範囲で
ある。また、各ハウジングにおいて、対向ステンレスベ
ルトを近付け挾持シ−トを押圧する押圧力は、20〜40kg
/cm2の範囲が採用される。20kg/cm2未満では鏡面性が劣
るので好ましくなく、40kg/cm2を超えても製造上の利点
は実質的にないから工業的に不利である。好ましい加圧
力範囲は、25〜35kg/cm2である。更に、シ−トは、この
鏡面ベルトの押圧と並行して40〜 100℃の温度に冷却さ
れる。この冷却温度が 100℃より高いとベルトから剥離
する際に、剥離マ−クが発生するので好ましくなく、ま
た、40℃未満の温度では、工業的利点が実質的にないの
で採用し難い。望ましい温度範囲は、60〜90℃である。
このような加熱と押圧冷却効果によってＰＣ，ＰＭＭ
Ａ，ＰＶＣなどのシ−トを含む多層積層シ−トに極めて
外観の優れた高光沢鏡面が得られることは、全く予想外
の発見であった。If the heating temperature of the laminated sheet is less than 170 ° C., satisfactory specular gloss cannot be obtained, and if it exceeds the resin decomposition temperature, the physical properties of the sheet obtained are deteriorated. The preferable heating temperature is in the range of 170 to 200 ° C. Also, in each housing, the pressing force to bring the opposing stainless steel belt closer and to press the holding sheet is 20-40kg.
The range of / cm 2 is adopted. If it is less than 20 kg / cm 2, it is not preferable because it is inferior in specularity, and if it exceeds 40 kg / cm 2 , it is industrially disadvantageous because there is substantially no manufacturing advantage. A preferable pressing range is 25 to 35 kg / cm 2 . Further, the sheet is cooled to a temperature of 40 to 100 ° C. in parallel with the pressing of the mirror belt. If the cooling temperature is higher than 100 ° C, peeling marks are generated when peeling from the belt, which is not preferable, and if the cooling temperature is lower than 40 ° C, there is substantially no industrial advantage and it is difficult to adopt. The preferred temperature range is 60-90 ° C.
Due to such heating and pressing cooling effects, PC, PMM
It was a completely unexpected finding that a high-gloss mirror surface having an extremely excellent appearance can be obtained in a multilayer laminated sheet including sheets such as A and PVC.
【００１２】[0012]
【発明の実施の形態】次に、添付図面により、本発明の
実施の形態を説明する。図１は、本発明の方法により、
ダブルベルト式プレス装置を用いて鏡面光沢を有する３
枚の積層シ−トを製造する例の説明用模式的側面図であ
る。図に示されるダブルベルト式プレス装置において、
押出機のＴダイ１から押出された溶融状ＰＣシ−ト２
は、上側及び下側から供給されるアクリル系樹脂シ−ト
３及び４で挾むように積層され、一対のハウジング５，
５’を備えたダブルベルト式プレス装置の一対の無端ス
テンレス鏡面ベルト６，６’の対向接近する間隙に連続
的に送り込まれる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows that according to the method of the present invention,
Uses a double-belt press to have a mirror-like gloss 3
FIG. 3 is a schematic side view for explaining an example of manufacturing a laminated sheet. In the double belt type press device shown in the figure,
Molten PC sheet 2 extruded from the T-die 1 of the extruder
Are stacked so as to be sandwiched by acrylic resin sheets 3 and 4 supplied from the upper side and the lower side.
A pair of endless stainless specular belts 6 and 6'of a double belt type press equipped with 5'are continuously fed into the gaps facing each other.
【００１３】該ダブルベルト式プレス装置には、積層シ
−ト送り込み側に一対の加熱ロ−ル７，７’が、また、
取出し側には一対の冷却ロ−ル８，８’が配置される。
上側の加熱ロ−ル７と冷却ロ−ル８には第一の無端ステ
ンレス鏡面ベルト６が、下側の加熱ロ−ル７’と冷却ロ
−ル８’には第二の無端ステンレス鏡面ベルト６’がそ
れぞれ掛回されている。該プレス装置内の中央部には、
上下一対の無端ステンレス鏡面ベルト６と６’が対向状
に接近してシ−トを挾持した状態で移動する両ベルトを
抱え込むようにハウジング５，５’が配置され、そのハ
ウジングにおいて、加熱ロ−ル７及び７’で 170℃ない
しシ−ト構成樹脂の分解開始温度の範囲内に加熱された
溶融積層状シ−トは、鏡面ベルト６，６’を介して20〜
40kg/cm2の範囲の圧力にプレスされると共に、挾持され
たシ−トはハウジングの冷却媒体循環冷却機構９，９’
により40〜100 ℃の温度に冷却され、冷却ロ−ル側から
鏡面光沢を有する三層積層シ−トが取り出される。In the double-belt type press, a pair of heating rolls 7 and 7'on the feeding side of the laminated sheet, and
A pair of cooling rolls 8 and 8'is arranged on the take-out side.
The upper heating roll 7 and the cooling roll 8 have the first endless stainless steel mirror surface belt 6, and the lower heating roll 7'and the cooling roll 8'have the second endless stainless steel mirror surface belt. 6'is hung around each. At the center of the press,
Housings 5 and 5'are arranged so that a pair of upper and lower endless stainless specular belts 6 and 6'approximately face each other and hold both belts that move while sandwiching the sheet. The molten laminated sheet heated at 170 ° C to the decomposition starting temperature of the sheet constituent resin by the rollers 7 and 7'is 20 to 20 ° C through the mirror belts 6 and 6 '.
While being pressed to a pressure in the range of 40 kg / cm 2 , the sandwiched sheet has a cooling medium circulating cooling mechanism 9, 9'of the housing.
Is cooled to a temperature of 40 to 100 ° C., and a three-layer laminated sheet having specular gloss is taken out from the cooling roll side.
【００１４】本発明の方法によれば、Ｔダイから押出さ
れたＰＣ，ＰＭＭＡ又はＰＶＣの単層シ−ト及びそれら
のシ−トを含む積層シ−トに、従来得られなかった鏡面
光沢を効率良く形成することができ、外観及び光学特性
と物理的性質の優れたシ−トを極めて効果的に提供する
ことができる。According to the method of the present invention, a single layer sheet of PC, PMMA or PVC extruded from a T-die and a laminated sheet containing these sheets have a specular gloss which has not been obtained before. It can be efficiently formed, and a sheet having excellent appearance, optical properties and physical properties can be provided very effectively.
【００１５】[0015]
【実施例】次に、具体例により、本発明を更に詳細に説
明する。 実施例 １ 分子量約25,000のポリカ−ボネ−ト（ＰＣ）を押出機の
Ｔダイから 0.5mmの厚さのシ−トを押出し、他方、ロ−
ルに巻かれたシ−トロ−ルから引出された厚さ0.05mmの
ポリメチルメタクリレ−ト（ＰＭＭＡ）のシ−トとを重
ね合わせて、図１のようなダブルベルト式プレス装置に
連続的に供給した。該プレス装置の加熱ロ−ルは 180℃
の温度に、また冷却ロ−ルは40℃の温度に設定された。
上記積層状シ−トは、プレス装置の両加熱ロ−ル部の両
無端ベルト間隙に供給され、加熱ロ−ル部の間隙の加圧
ヘッド部において再加熱溶融されると共に、30kg/cm2の
圧力に加圧され、移動しながらハウジング内において、
その冷却機構により70℃の温度に冷却され、装置の冷却
ロ−ル側から優れた鏡面光沢を有する積層シ−トが引き
出された。得られた0.55mmの厚さのシ−トの光学特性
は、ヘイズが１，全光線透過率が89％で、鏡面特性とし
ての中心線表面粗さＲａ（μｍ）は、0.02であった。Now, the present invention will be described in further detail with reference to specific examples. Example 1 A polycarbonate (PC) having a molecular weight of about 25,000 was extruded from a T-die of an extruder to a sheet having a thickness of 0.5 mm, while the sheet was rolled.
A sheet of 0.05 mm thick polymethylmethacrylate (PMMA) drawn from a sheet wound on a roll is overlaid and continuously placed in a double-belt type press as shown in FIG. Supplied. The heating roll of the press machine is 180 ° C.
And the cooling roll was set at a temperature of 40 ° C.
The laminated sheet is supplied to both endless belt gaps of both heating roll parts of the press machine, reheated and melted in the pressure head part of the gap of the heating roll part, and 30 kg / cm 2 It is pressurized to the pressure of
It was cooled to a temperature of 70 ° C. by the cooling mechanism, and a laminated sheet having excellent specular gloss was drawn out from the cooling roll side of the device. Regarding the optical characteristics of the obtained sheet having a thickness of 0.55 mm, the haze was 1, the total light transmittance was 89%, and the center line surface roughness Ra (μm) as a mirror surface characteristic was 0.02.
【００１６】実施例 ２ 実施例１において、ＰＭＭＡのシ−トを積層しないほか
は、全く同様に操作して、ＰＣの単層鏡面シ−トを得
た。得られた 0.5mmの厚さのＰＣ単層シ−トの光学特性
は、ヘイズが 0.8，全光線透過率が90％で、中心線表面
粗さＲａ（μｍ）は0.02であった。Example 2 A PC single-layer mirror sheet was obtained in the same manner as in Example 1, except that the PMMA sheet was not laminated. The optical characteristics of the obtained 0.5 mm-thick PC single-layer sheet were such that haze was 0.8, total light transmittance was 90%, and center line surface roughness Ra (μm) was 0.02.
【００１７】実施例 ３ 実施例１において、押出機のＴダイから押出されたＰＣ
の厚さ0.5 mmの溶融シ−トの両面に、ロ−ルから引き出
された厚さ0.05mmのＰＭＭＡのシ−ト及び押出機のＴダ
イから押出された平均重合度約1200のポリ塩化ビニル
（ＰＶＣ）の透明配合組成物の厚さ0.5 mmの溶融シ−ト
を重ねてダブルベルト式プレス装置に連続的に供給し
た。三層シ−トは、ＰＭＭＡとＰＶＣのシ−トでＰＣシ
−トをサンドイッチ状に重ね合わされてダブルベルト式
プレス装置に連続的に供給された。プレス装置から取出
された1.05mmの厚さの三層積層シ−トの光学特性は、ヘ
イズが1.2 ，全光線透過率が89％で、中心線表面粗さＲ
ａ（μｍ）は0.02であった。Example 3 In Example 1, PC extruded from the T die of the extruder
On both sides of a 0.5 mm thick molten sheet, a 0.05 mm thick sheet of PMMA drawn from a roll and a polyvinyl chloride with an average degree of polymerization of about 1200 extruded from the T-die of the extruder. A 0.5 mm thick molten sheet of the transparent compound composition of (PVC) was layered and continuously fed to a double belt type press. The three-layer sheet was a sheet of PMMA and PVC, and a sheet of PC was laminated in a sandwich form and continuously supplied to a double-belt type press. The optical characteristics of the 1.05 mm thick three-layer laminated sheet taken out from the press machine are as follows: haze 1.2, total light transmittance 89%, center line surface roughness R
The value of a (μm) was 0.02.
【００１８】なお、上記光学特性，鏡面特性測定及び後
記加熱収縮特性の測定は、次の基準に準じて行った。 光学特性（ヘイズ，全光線透過率）： ＪＩＳ Ｋ ７１０５ に準じて測定 鏡面特性（中心線表面粗さ）： ＪＩＳ Ｂ ０６０１ に準じて測定 加熱収縮特性（加熱収縮率）： ＪＩＳ Ｋ ６７４５ に準じて測定The above-mentioned optical characteristics, specular surface characteristics and heat shrinkage characteristics described later were measured according to the following criteria. Optical properties (haze, total light transmittance): Measured according to JIS K 7105 Mirror surface property (center line surface roughness): Measured according to JIS B 0601 Heat shrinkage property (heat shrinkage ratio): According to JIS K 6745 Measurement
【００１９】比較例 １〜３ 前記実施例１，２及び３において、ダブルベルト式プレ
ス装置に換えて、表面が鏡面に磨き上げられた３本のロ
−ルを組合わせた従来の鏡面仕上用ポリッシング機を用
いた以外は、各実施例と全く同様に操作して、ＰＭＭＡ
／ＰＣ二層積層シ−ト（比較例１）、ＰＣ単層シ−ト
（比較例２）及びＰＭＭＡ／ＰＣ／ＰＶＣ三層積層シ−
ト（比較例３）を製造した。得られた各シ−トのそれら
の光学特性及び鏡面特性を測定し、それらの結果を下掲
表１に示した。なお、表１には、実施例１〜３及び比較
例１〜３の各シ−トの外観及び 140℃における加熱収縮
率を記載すると共に、参考のために、前記実施例１〜３
の測定値を再記した。Comparative Examples 1 to 3 In the above-mentioned Examples 1, 2 and 3, instead of the double belt type pressing device, a conventional mirror finishing in which three rolls whose surfaces are mirror-polished are combined. Except for using the polishing machine, the PMMA was operated in the same manner as in each example.
/ PC two-layer laminated sheet (Comparative Example 1), PC single-layer sheet (Comparative Example 2) and PMMA / PC / PVC three-layer laminated sheet
(Comparative Example 3) was manufactured. The optical characteristics and mirror surface characteristics of each of the obtained sheets were measured, and the results are shown in Table 1 below. In addition, in Table 1, the appearance and heat shrinkage rate at 140 ° C. of each sheet of Examples 1 to 3 and Comparative Examples 1 to 3 are described, and for the sake of reference, Examples 1 to 3 are also shown.
The measured value of was re-written.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【発明の効果】上表から明らかなように、本発明の方法
は、ポリカ−ボネ−ト，アクリル系樹脂又は塩化ビニル
系樹脂の鏡面光沢性の高度に改善された単層あるいは積
層シ−トを効果的に提供することができ、同時に透明
性，高温時の寸法安定性に優れ、外観も良好な実用的に
望ましいそれらの鏡面板を連続的に製造することができ
るので、極めて高い産業上の利用性を有する。As is apparent from the above table, the method of the present invention is a single-layer or laminated sheet having highly improved specular gloss of polycarbonate, acrylic resin or vinyl chloride resin. Can be effectively provided, and at the same time, it is possible to continuously manufacture those mirror-finished plates, which are excellent in transparency and dimensional stability at high temperature and have a good appearance, which is practically desirable. Have availability.
【図１】本発明の方法を実施する装置の一例の説明用模
式的側面図である。FIG. 1 is a schematic side view for explaining an example of an apparatus for carrying out the method of the present invention.
１ ・・・Ｔダイ ２，３，４・・・樹脂シート ５，５’・・・一対のハウジング ６，６’・・・無端ステンレス鏡面ベルト ７，７’・・・一対の加熱ロ−ル ８，８’・・・一対の冷却ロ−ル ９，９’・・・冷却媒体循環冷却機構９ 1 ... T die 2,3,4 ... resin sheet 5,5 '... pair of housings 6,6' ... endless stainless specular belt 7,7 '... pair of heating rolls 8, 8 '... a pair of cooling rolls 9, 9' ... Cooling medium circulation cooling mechanism 9
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｋ 33:00 69:00 Ｂ２９Ｌ 9:00 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display area B29K 33:00 69:00 B29L 9:00
Claims (1)
ボネ−ト，アクリル系樹脂及びポリ塩化ビニル系樹脂の
シ−トから選択される単層又は多層積層シ−トを、一対
のハウジングを備えたダブルベルト式プレス装置の対向
する一対の無端ステンレス鏡面ベルト間に加熱ロ−ル側
から連続的に送り込み、送り込まれた該シ−トを１７０
℃から樹脂分解開始温度までの範囲内の温度に加熱した
後、前記一対の無端ステンレス鏡面ベルトの間隙に挾持
される間に、ハウジングにおいて、対向する両ベルトを
２０〜４０kg/cm2の面圧に押圧保持すると共に、４０〜
１００℃の温度に冷却することを特徴とする熱可塑性プ
ラスチック鏡面シ−トの製造方法。1. A polymer extruded from a T-die of an extruder.
A single-layer or multi-layer laminated sheet selected from a sheet of a bone, an acrylic resin, and a polyvinyl chloride resin is used as a pair of opposed endless stainless mirror surfaces of a double-belt type press equipped with a pair of housings. The sheet was continuously fed from the heating roll side between the belts, and the fed sheet was 170
After heating to a temperature in the range from ℃ to the resin decomposition start temperature, while sandwiched in the gap between the pair of endless stainless specular belts, the opposing belts in the housing have a surface pressure of 20 to 40 kg / cm 2 . While pressing and holding to 40 ~
A method for producing a thermoplastic plastic mirror sheet, which comprises cooling to a temperature of 100 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5911996A JPH09248855A (en) | 1996-03-15 | 1996-03-15 | Production of thermoplastic mirror surface sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5911996A JPH09248855A (en) | 1996-03-15 | 1996-03-15 | Production of thermoplastic mirror surface sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09248855A true JPH09248855A (en) | 1997-09-22 |
Family
ID=13104114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5911996A Pending JPH09248855A (en) | 1996-03-15 | 1996-03-15 | Production of thermoplastic mirror surface sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09248855A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020006017A (en) * | 2001-12-26 | 2002-01-18 | 손봉락 | The Method of Producing Laminated Plate |
| US7135085B2 (en) | 2003-12-22 | 2006-11-14 | Shin-Etsu Polymer Co., Ltd. | Production method of decorative film |
| WO2016098981A1 (en) * | 2014-12-19 | 2016-06-23 | 로얄소브린 인터네셔널 인코포레이션 | Sheet bonding apparatus |
-
1996
- 1996-03-15 JP JP5911996A patent/JPH09248855A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020006017A (en) * | 2001-12-26 | 2002-01-18 | 손봉락 | The Method of Producing Laminated Plate |
| US7135085B2 (en) | 2003-12-22 | 2006-11-14 | Shin-Etsu Polymer Co., Ltd. | Production method of decorative film |
| US7335274B2 (en) | 2003-12-22 | 2008-02-26 | Shin-Etsu Polumer Co., Ltd. | Production method of decorative film |
| WO2016098981A1 (en) * | 2014-12-19 | 2016-06-23 | 로얄소브린 인터네셔널 인코포레이션 | Sheet bonding apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4734335A (en) | Multilayer film formed of polyester and having a core layer suitable for thermoplastic embossing | |
| TWI250077B (en) | Metal laminate for a circuit board | |
| JP2951042B2 (en) | Method and apparatus for producing smooth extruded plain sheets or films, methods for producing such extruded articles and optical storage media | |
| US5108814A (en) | Embossed oriented film | |
| US20110227238A1 (en) | Apparatus and method for producing optical sheeting | |
| JP4793782B2 (en) | Hollow structure plate manufacturing method and manufacturing system thereof | |
| JP3193801B2 (en) | Method for producing thermoplastic resin sheet or film | |
| US5024799A (en) | Method for producing an embossed oriented film | |
| US5232535A (en) | Process for preparing embossed, coated paper | |
| ZA200501019B (en) | Method for the production of low orientation thermoplastic film the film produced thus and use thereof | |
| HU226495B1 (en) | Method for producing surface-hardened pmma films which are highly glossy on both sides, free of gel bodies and can be manipulated in the "film-insert-moulding" method | |
| TWI461762B (en) | Thin double-sided light guide plate | |
| JP2003181916A (en) | Embossable thermoplastic polyester film and method for producing the film | |
| JPH09248855A (en) | Production of thermoplastic mirror surface sheet | |
| JP4237275B2 (en) | Polypropylene resin sheet or film manufacturing method and manufacturing apparatus thereof | |
| US6129800A (en) | Process for preparing embossed metal foil laminate | |
| US4721592A (en) | Film embossing process | |
| US7074289B2 (en) | Method for preparing laminating materials | |
| JP3683688B2 (en) | Method for manufacturing laminated thermoplastic resin sheet and apparatus for manufacturing the same | |
| JPH11320656A (en) | Thermoplastic resin sheet having small optical strain and excellent surface smoothness, and manufacture thereof | |
| JP3186335B2 (en) | Continuous manufacturing method of thermoplastic mirror plate | |
| US20070240813A1 (en) | Process for forming a multilayer film and the film formed therefrom | |
| JP3128293U (en) | Wide angle mirror lens | |
| DK172119B1 (en) | Thermoformable polyaryl ether ketone - polyvinyl fluoride laminates, and thermoformed objects prepared from them | |
| JP2003211602A (en) | Release multilayered film and cover-lay molding method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Effective date: 20041112 Free format text: JAPANESE INTERMEDIATE CODE: A971007 |
|
| A131 | Notification of reasons for refusal |
Effective date: 20050323 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A521 | Written amendment |
Effective date: 20050520 Free format text: JAPANESE INTERMEDIATE CODE: A523 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20061120 |