JPS6312643A - Polycarbonate resin sheet having improved printability and production thereof - Google Patents
Polycarbonate resin sheet having improved printability and production thereofInfo
- Publication number
- JPS6312643A JPS6312643A JP15686786A JP15686786A JPS6312643A JP S6312643 A JPS6312643 A JP S6312643A JP 15686786 A JP15686786 A JP 15686786A JP 15686786 A JP15686786 A JP 15686786A JP S6312643 A JPS6312643 A JP S6312643A
- Authority
- JP
- Japan
- Prior art keywords
- polycarbonate resin
- sheet
- ultraviolet rays
- polycarbonate
- improved printability
- 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
- 229920005668 polycarbonate resin Polymers 0.000 title claims abstract description 15
- 239000004431 polycarbonate resin Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 230000001678 irradiating effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 229920000515 polycarbonate Polymers 0.000 abstract description 16
- 239000004417 polycarbonate Substances 0.000 abstract description 16
- 238000007639 printing Methods 0.000 abstract description 15
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000000976 ink Substances 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Landscapes
- Treatments Of Macromolecular Shaped Articles (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、被印刷面を紫外線を含む光線で照射した、印
刷性の改善されたポリカーボネートシートおよびその製
造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a polycarbonate sheet with improved printability in which the surface to be printed is irradiated with light including ultraviolet rays, and a method for manufacturing the same.
ポリカーボネートシート板は、耐熱性、耐衝撃性、光線
透過率が優れ、建材や工業部品等に使用されており、な
かでも厚さが２１以下のポリカーボネートシートは、打
抜き加工性の容易さから自動車計器カバー、電気製品の
前面板などの銘板用途に多く使用されている。Polycarbonate sheets have excellent heat resistance, impact resistance, and light transmittance, and are used for building materials and industrial parts. Among them, polycarbonate sheets with a thickness of 21 mm or less are used for automobile instruments because of their ease of punching. It is often used for nameplates such as covers and front panels of electrical products.
これらの銘板は、製品上の要求特性としてスクリーン印
刷を施し、種々の色調のインクを用いた多層刷りが要求
される。These nameplates require screen printing and multilayer printing using inks of various colors as required product characteristics.
しかしながらポリカーボネートシートにスクリーン印刷
を施すと、一層の印刷後あるいは多層の印刷後に亀裂が
発生する場合があり、この改善が望まれていた。However, when screen printing is performed on a polycarbonate sheet, cracks may occur after printing one layer or after printing multiple layers, and an improvement in this problem has been desired.
本発明は、以上の欠点を解消しスクリーン印刷後に印刷
亀裂が発生することなく安定した印刷品が得られるポリ
カーボネートシートを供給することを目的としている。It is an object of the present invention to provide a polycarbonate sheet that eliminates the above-mentioned drawbacks and allows stable printed products to be obtained without generating printing cracks after screen printing.
本発明者は、前記目的を達成するために鋭意検討した結
果、印刷の前処理としてポリカーボネートシートに紫外
線を含む光線を照射することにより、印刷亀裂が防止で
きしかも従来と同様の印刷インクの密着性を有している
ことを見い出し、本発明を完成するに至ったものである
。As a result of intensive studies to achieve the above object, the inventor of the present invention discovered that by irradiating a polycarbonate sheet with a light beam containing ultraviolet rays as a pretreatment for printing, it is possible to prevent printing cracks while maintaining the same adhesion of printing ink as before. The present invention was completed based on the discovery that the present invention has the following properties.
即ち本発明の要旨とするところは、被印刷面が紫外線を
含む光線で照射されていることを特徴とする印刷性の改
善されたポリカーボネートシートを第１の発明とし、ポ
リカーボネート樹脂を溶融して押出し、シート状に賦型
したのちに予め設置してある紫外線を含む照射装置を通
過させて被印刷面を照射することを特徴とする印刷性の
改善されたポリカーボネートシートの製造方法を第２の
発明とするところにある。That is, the gist of the present invention is that the first invention is a polycarbonate sheet with improved printability characterized in that the surface to be printed is irradiated with light including ultraviolet rays, and a polycarbonate sheet that is melted and extruded from a polycarbonate resin. A second invention provides a method for producing a polycarbonate sheet with improved printability, characterized in that the surface to be printed is irradiated by passing it through a pre-installed irradiation device containing ultraviolet rays after forming it into a sheet shape. There it is.
以下、本発明を図面に基いてさらに詳細に説明する。Hereinafter, the present invention will be explained in more detail based on the drawings.
第１図は本発明の製造方法を実施する装置の概要を示し
ており、図中（１）が押出し機、（２）がダイス、（３
）が仕上げローラー、（４）がガイドローラー、（５）
が引取りローラー、（６）が切断機である。FIG. 1 shows an outline of the apparatus for implementing the manufacturing method of the present invention, in which (1) is an extruder, (2) is a die, and (3) is an extruder.
) is the finishing roller, (4) is the guide roller, (5)
is a take-up roller, and (6) is a cutting machine.
本発明はこのような装置において、引取りローラー（５
）の前の位置に、紫外線照射装置（７）を設置したこと
を特徴とするものであるが、この紫外線照射装置（７）
はこの位置に限られるものではなく、例えば引取りロー
ラー（５）の後であってもよい。In such a device, the present invention provides a take-up roller (5
) is characterized in that an ultraviolet irradiation device (7) is installed in front of the ultraviolet irradiation device (7).
is not limited to this position, for example, it may be after the take-off roller (5).
以上の方法によって製造されたポリカーボネート樹脂シ
ート（Ｐ）は、その片面が紫外線で照射されているため
、印刷性が著しく改善されたことが確認された。It was confirmed that the polycarbonate resin sheet (P) produced by the above method had significantly improved printability because one side thereof was irradiated with ultraviolet rays.
ところで、ポリカーボネートシートに印刷すると亀裂が
発生する理由は、使用するインク。By the way, the reason why cracks occur when printing on polycarbonate sheets is the ink used.
シンナーの種類、またポリカーボネート樹脂シートの表
面の傷あるいはポリカーボネートシートの製造過程時の
温度履歴の違いによる表面の応力分布等が考えられるが
、本発明のシートは、紫外線を含む光線で照射されてい
る九め、印刷時の亀裂を防ぐ物理的、化学的な変化が起
きるものと想像される。This may be due to the type of thinner, scratches on the surface of the polycarbonate resin sheet, or differences in the temperature history during the manufacturing process of the polycarbonate sheet, but the sheet of the present invention is irradiated with light including ultraviolet rays. Ninth, it is assumed that physical and chemical changes occur that prevent cracks during printing.
なおポリカーボネート成型品の表面に、熱硬化性皮膜を
形成するに際し、事前に２，０００〜５．１０ＯＡの紫
外線を照射してから行なう処理方法が知られている（特
公昭４９−４５５０４号公報）が、本発明者等の検討に
よって印刷性も改善することが見い出された。In addition, when forming a thermosetting film on the surface of a polycarbonate molded product, there is a known treatment method in which ultraviolet rays of 2,000 to 5.10 OA are irradiated in advance (Japanese Patent Publication No. 49-45504). However, through studies by the present inventors, it has been found that printability is also improved.
一般に紫外線は波長４０ ｎｍ〜４００ ｈｍの範囲の
光線を言うが、極端紫外２００ ｍｍ以下は著しくポリ
カーボネートシートの分解が促進される。またこの波長
の紫外線は、空気中の酸素に吸収されるため空気中では
実用がほとんど不可能であり、本発明にかいては、波長
が２００ｎｍ〜４００ｎｍの範囲の紫外線が実用的に用
いられる。その光源としては例えば高圧水銀灯であり、
これは石英ガラスを材質とした線光源である。Generally, ultraviolet rays refer to light rays with wavelengths in the range of 40 nm to 400 hm, but extreme ultraviolet rays of 200 mm or less significantly accelerate the decomposition of polycarbonate sheets. In addition, ultraviolet rays of this wavelength are absorbed by oxygen in the air, so it is almost impossible to use in the air, and in the present invention, ultraviolet rays with wavelengths in the range of 200 nm to 400 nm are practically used. The light source is, for example, a high-pressure mercury lamp.
This is a line light source made of quartz glass.
なお紫外線照射の程度は紫外線の強度、波長により異な
るが、本発明の目的である印刷亀裂が防止できる程度で
あればよく、この際に紫外線照射によりポリカーボネー
トシートが著しく黄変または熱変形を起し製品として不
適格にならない範囲内で行なうとよい。The degree of ultraviolet irradiation varies depending on the intensity and wavelength of the ultraviolet rays, but it is sufficient that the degree of UV irradiation can prevent printing cracks, which is the purpose of the present invention. It is advisable to do this within a range that does not disqualify the product.
実施例１
はソ第１図に示す如き装置を用いて印刷性の改善された
ポリカーボネート樹脂シートを製作した。このときの紫
外線照射装置としては、千行凰反射板を備えた８０Ｗ／
αの高圧水銀灯を用い、これをシートから２１譚離れる
ように設置した。（これによりシートには約４〜５秒間
照射された）
このようにして得られたシートの処理面に、東洋インキ
社製インキ１セリコール１３６１１白”（溶剤としてシ
ンナー１３−００２使用）を用いて印刷したところ、同
等亀裂は生じなかった。Example 1 A polycarbonate resin sheet with improved printability was produced using an apparatus as shown in FIG. The ultraviolet irradiation device used at this time was an 80W/
An α high-pressure mercury lamp was used and was placed 21 degrees away from the sheet. (Thus, the sheet was irradiated for about 4 to 5 seconds.) The treated side of the sheet thus obtained was coated with Toyo Ink's Ink 1 Sericol 13611 White (using thinner 13-002 as the solvent). When printed, equivalent cracks did not occur.
また印刷面を接着テープによるクロスカット試験を実施
したところ、印刷直後および加速暴露（サンシャインウ
エザオメーター１．０ Ｏ０時間）後も良好な密着性を
有していた。加速暴露後のシートについて、機械的強度
および黄変度について評価したところ、印刷直後と同等
であった。In addition, when the printed surface was subjected to a cross-cut test using an adhesive tape, it had good adhesion immediately after printing and after accelerated exposure (Sunshine Weather-Ometer 1.00 hours). The sheet after accelerated exposure was evaluated for mechanical strength and degree of yellowing, and was found to be equivalent to that immediately after printing.
なお、紫外線を照射しないで同様に製作したポリカーボ
ネート樹脂シートに、上記と同じ印刷を施したところ、
細かい亀裂が生じていた。In addition, when the same printing as above was applied to a polycarbonate resin sheet similarly produced without irradiation with ultraviolet rays,
Fine cracks had appeared.
本発明は以上詳述した如き構成からなるものであるから
、印刷性の改善されたポリカーボネート樹脂シートが容
易に得られ、このシートを用いるときは印刷上のトラブ
ルを未然に防止でき、しかもこのようなポリカーボネー
ト樹脂シートを効率よく、かつ安定した品質で供給しう
る利点がある。Since the present invention has the structure as described in detail above, it is possible to easily obtain a polycarbonate resin sheet with improved printability, and when using this sheet, it is possible to prevent printing troubles beforehand. It has the advantage of being able to supply polycarbonate resin sheets efficiently and with stable quality.
第１図は本発明製造方法を実施する一例を示す装置の概
略的な側面図である。
（１）・・・押出し機、（２）・−・ダイス（３）・・
・仕上げローラー、（４）・・・ガイドローラー（５）
・・・引取りローラー、（６）・・・切断機（７）・・
・紫外線照射装置FIG. 1 is a schematic side view of an apparatus showing an example of implementing the manufacturing method of the present invention. (1)...Extruder, (2)...Dice (3)...
・Finishing roller, (4)...Guide roller (5)
... Take-up roller, (6) ... Cutting machine (7) ...
・Ultraviolet irradiation device
Claims (1)
を特徴とする印刷性の改善されたポリカーボネート樹脂
シート。 ２、波長が２００〜４００ｎｍの紫外線によつて照射さ
れていることを特徴とする特許請求の範囲第１項記載の
印刷性の改善されたポリカーボネート樹脂シート。 ３、ポリカーボネート樹脂を溶融して押出し、シート状
に賦形したのちに、予め設置してある紫外線を含む照射
装置を通過させて被印刷面を照射することを特徴とする
印刷性の改善されたポリカーボネート樹脂シートの製造
方法。 ４、波長が２００〜４００ｎｍの紫外線を照射すること
を特徴とする特許請求の範囲第３項記載の印刷性の改善
されたポリカーボネート樹脂シートの製造方法。[Claims] 1. A polycarbonate resin sheet with improved printability, characterized in that the surface to be printed is irradiated with light including ultraviolet rays. 2. A polycarbonate resin sheet with improved printability according to claim 1, which is irradiated with ultraviolet light having a wavelength of 200 to 400 nm. 3. Improved printability characterized by melting and extruding polycarbonate resin, shaping it into a sheet, and then passing it through a pre-installed irradiation device containing ultraviolet rays to irradiate the surface to be printed. Method for manufacturing polycarbonate resin sheets. 4. The method for producing a polycarbonate resin sheet with improved printability as set forth in claim 3, which comprises irradiating ultraviolet light having a wavelength of 200 to 400 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15686786A JPS6312643A (en) | 1986-07-03 | 1986-07-03 | Polycarbonate resin sheet having improved printability and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15686786A JPS6312643A (en) | 1986-07-03 | 1986-07-03 | Polycarbonate resin sheet having improved printability and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6312643A true JPS6312643A (en) | 1988-01-20 |
Family
ID=15637120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15686786A Pending JPS6312643A (en) | 1986-07-03 | 1986-07-03 | Polycarbonate resin sheet having improved printability and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6312643A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04318037A (en) * | 1990-12-27 | 1992-11-09 | Abb Patent Gmbh | Method of surface treatment |
| JP2004089928A (en) * | 2002-09-03 | 2004-03-25 | Tsutsunaka Plast Ind Co Ltd | Method of manufacturing antidazzle polycarbonate board |
-
1986
- 1986-07-03 JP JP15686786A patent/JPS6312643A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04318037A (en) * | 1990-12-27 | 1992-11-09 | Abb Patent Gmbh | Method of surface treatment |
| JP2004089928A (en) * | 2002-09-03 | 2004-03-25 | Tsutsunaka Plast Ind Co Ltd | Method of manufacturing antidazzle polycarbonate board |
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