JP4158312B2 - Method for producing heat-resistant printing ink and decorative resin product - Google Patents
Method for producing heat-resistant printing ink and decorative resin product Download PDFInfo
- Publication number
- JP4158312B2 JP4158312B2 JP2000109492A JP2000109492A JP4158312B2 JP 4158312 B2 JP4158312 B2 JP 4158312B2 JP 2000109492 A JP2000109492 A JP 2000109492A JP 2000109492 A JP2000109492 A JP 2000109492A JP 4158312 B2 JP4158312 B2 JP 4158312B2
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- Prior art keywords
- printing ink
- resin
- resistant printing
- heat
- formula
- 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.)
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- MXNMKOQEJHXPFO-UHFFFAOYSA-N CC(C)(c(cc1)ccc1OC)c(cc1)ccc1OC(C)=O Chemical compound CC(C)(c(cc1)ccc1OC)c(cc1)ccc1OC(C)=O MXNMKOQEJHXPFO-UHFFFAOYSA-N 0.000 description 1
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- Injection Moulding Of Plastics Or The Like (AREA)
- Polyesters Or Polycarbonates (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、射出成形品の表面に加飾性を付与するために用いられる印刷インキ、及び該インキを用いた加飾樹脂製品の製造方法に関する。
【０００２】
【従来の技術】
従来より、表面に所望の図形、文字等の加飾が施された樹脂製品の製造に際しては、加飾印刷が施されたシートを金型中にインサートした後、溶融した樹脂を金型中に射出して、樹脂表面に加飾印刷が施されたシートを一体化させる成形法（以下、インサート成形という。）が用いられている。このインサート成形において、加飾用に使用される印刷インキは、射出される高温の溶融樹脂の熱影響によってもシートから溶融流動することなく、強固に固着していることが必要である。
【０００３】
かかる条件を満たすインキの結合剤として、
【化３】
【０００４】
しかしながら、一般に市販されているポリカーボネート樹脂は、
【化４】
しかるに、上記式（３）で示される構造の二官能カーボネートは構造が複雑であり、その合成は容易でないという欠点を有する。
【０００５】
しかるに、上記式（３）で示される構造の二官能カーボネートは構造が複雑であり、その合成は容易でないという欠点を有する。
【０００６】
【発明が解決しようとする課題】
したがって、本発明の目的は、式（３）で示されるような複雑な化学構造ユニットを必要とせず、式（４）で示される化学構造に近い構造ユニットで構成されるポリカーボネート樹脂を結合剤として含む耐熱性印刷インキを提供することであり、また該耐熱性印刷インキを用いて加飾樹脂製品の製造方法を提供することである。
【０００７】
【課題を解決するための手段】
上記課題を解決するために本発明は、
【化５】
【化６】
【０００８】
式（１）において、Ｒはメチル基である。
式（２）は、最も一般的なポリカーボネート樹脂の構造単位である。
【０００９】
本発明にかかる耐熱性印刷インキの結合剤となるポリカーボネート樹脂は、式（１）と式（２）との構造単位を種々の割合で含むことができ、またその配列も規則的、ランダム的、あるいはブロック的であってもよい。但し、結果的には結合樹脂はシクロヘキサノン可溶性であることが必要である。
【００１０】
したがって、前記式（１）及び（２）の構造単位の比率や配列様式も、その範囲内で制限される。
【００１１】
本発明にかかる耐熱性印刷インキにおける結合剤として市販されている樹脂の例としてしては、三菱瓦斯化学（株）製ユーピロンＦＰＣ２１３６などがある。
【００１２】
本発明の耐熱性印刷インキは、当然のことながら、その必須成分として溶剤を含有するが、溶剤の例としてはケトン類、エステル類、アルコール類、芳香族炭化水素や、これらの混合物を挙げることができる。
【００１３】
特に、シクロヘキサノンを溶剤の一部として含有する耐熱性印刷インキは、インサート用のシートに印刷した場合に、該シートとの密着性が良好である。このことは、インサート成形時において、熱溶融樹脂による熱影響によりインキの溶融流動や剥離が生じず、これにより加飾画像の変形を防ぐ意味で重要である。
【００１４】
また、本発明にかかる加飾樹脂製品の製造方法において、上記耐熱性印刷インキを用いて形成する加飾シートは、ポリカーボネート等の基材のフィルム上に、スクリーン印刷等の印刷方法によって、図形、文字等所定のパターンを設けることにより作製することができる。
【００１５】
また、加飾樹脂製品を製造するために、金型中に溶融射出する樹脂の例としては、ポリカーボネート樹脂、アクリロニトリル・ブタジエン・スチレン共重合体樹脂（ＡＢＳ樹脂）、ポリカーボネート樹脂／ＡＢＳ樹脂ブレンド樹脂などがある。これらの樹脂は、一般に２００℃以上、好ましくは２３０℃以上の高温で射出成形される。したがって、このような高温において射出成形と加飾とを同時に行う方法において、本発明にかかる耐熱性印刷インキを使用することは効果的である。
【００１６】
【実施例】
以下、本発明の実施例について説明する。
（実施例１）
【００１７】
式（１）と（２）の共重合体であるポリカーボネート樹脂（三菱瓦斯化学（株）製ユーピロンＦＰＣ２１３６）：２０重量部、顔料：１０重量部、消泡剤：１重量部、溶剤としてシクロヘキサノン：３０重量部、プロピレングリコールモノメチルエーテルアセテート：３０重量部、ソルベッソ♯１５０：１０重量部を混合して印刷インキを製造した。
【００１８】
このインキを使用してポリカーボネートフィルムに文字を加飾印刷した。かくして印刷されたフィルムを射出成形金型中に印刷面を内側にして設置し、ポリカーボネート樹脂（三菱瓦斯化学（株）製ユーピロンＳ−３０００）をシリンダー温度３０５℃で溶融射出成形した。
【００１９】
加飾フィルムは完全に成形品と一体化し、しかも加飾された文字に、滲みや流れが認められず、鮮明性が保たれた。
【００２０】
（実施例２）
射出成形する樹脂をポリカーボネート樹脂／ＡＢＳ樹脂のブレンド樹脂（三菱瓦斯化学（株）製ユーピロンＰＭ１２１０）とし、シリンダー温度２５０℃にする以外は実施例１と同様に行った。
【００２１】
結果として実施例１と同様に、加飾フィルムが完全に成形品と一体化された成形品が得られ、加飾された文字に、滲みや流れがなく、鮮明性が完全に保たれた。
【００２２】
（比較例１）
印刷インキの結合剤としてポリカーボネート樹脂の代わりにアクリル樹脂を使用する以外は、実施例１と同様に行った。
加飾印刷に使用されたインキは溶融流れを生じ、加飾文字が読み取り難い成形品が得られた。
【００２３】
【発明の効果】
以上説明したように本発明によれば、複雑な化学構造ユニットを必要とせず、安価に製造容易であるポリカーボネート樹脂を結合剤として含む耐熱性印刷インキを提供することができる。また、この耐熱性印刷インキを用いた加飾樹脂製品の製造方法により、安価でしかも高温（２３０℃以上）の溶融樹脂を射出しても、熱影響による加飾の滲みや流れ（流動）、あるいは剥離のない加飾樹脂製品を得ることができる。したがって、高温で射出成形せざるを得ない樹脂を用いる場合であっても、鮮明な加飾が施された製品の製造が可能となる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing ink used for imparting a decorative property to the surface of an injection molded product, and a method for producing a decorative resin product using the ink.
[0002]
[Prior art]
Conventionally, in the production of a resin product whose surface is decorated with desired figures, letters, etc., after inserting a sheet with decorative printing into the mold, the molten resin is put into the mold. A molding method (hereinafter referred to as insert molding) in which a sheet having a decorative print on the resin surface is integrated is used. In this insert molding, it is necessary that the printing ink used for decoration is firmly fixed without being melted and flowed from the sheet even under the influence of the hot molten resin to be injected.
[0003]
As an ink binder satisfying such conditions,
[Chemical 3]
[0004]
However, generally available polycarbonate resins are
[Formula 4]
However, the bifunctional carbonate having the structure represented by the above formula (3) has a drawback that the structure is complicated and its synthesis is not easy.
[0005]
However, the bifunctional carbonate having the structure represented by the above formula (3) has a drawback that the structure is complicated and its synthesis is not easy.
[0006]
[Problems to be solved by the invention]
Therefore, the object of the present invention is not to require a complex chemical structural unit as represented by the formula (3), and a polycarbonate resin composed of a structural unit close to the chemical structure represented by the formula (4) as a binder. It is to provide a heat-resistant printing ink containing, and to provide a method for producing a decorative resin product using the heat-resistant printing ink.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention
[Chemical formula 5]
[Chemical 6]
[0008]
In the formula (1) , R is a methyl group.
Formula (2) is the most common structural unit of polycarbonate resin.
[0009]
The polycarbonate resin used as the binder for the heat-resistant printing ink according to the present invention can contain structural units of the formulas (1) and (2) in various proportions, and the arrangement thereof is regular, random, Alternatively, it may be block-like. However, as a result, the binding resin needs to be soluble in cyclohexanone.
[0010]
Therefore, the ratio and arrangement pattern of the structural units of the formulas (1) and (2) are also limited within the range.
[0011]
As an example of resin marketed as a binder in the heat-resistant printing ink according to the present invention, there is Iupilon FPC2136 manufactured by Mitsubishi Gas Chemical Co., Ltd.
[0012]
The heat-resistant printing ink of the present invention naturally contains a solvent as an essential component, and examples of the solvent include ketones, esters, alcohols, aromatic hydrocarbons, and mixtures thereof. Can do.
[0013]
In particular, a heat-resistant printing ink containing cyclohexanone as a part of the solvent has good adhesion to the sheet when printed on a sheet for insert. This is important in the sense that the melt flow and separation of the ink do not occur due to the thermal effect of the hot melt resin during insert molding, thereby preventing the decoration image from being deformed.
[0014]
Moreover, in the manufacturing method of the decorative resin product according to the present invention, the decorative sheet formed using the heat-resistant printing ink is formed on a substrate film such as polycarbonate by a printing method such as screen printing. It can be produced by providing a predetermined pattern such as letters.
[0015]
Examples of resins that are melt-injected into molds to produce decorative resin products include polycarbonate resins, acrylonitrile / butadiene / styrene copolymer resins (ABS resins), polycarbonate resins / ABS resin blend resins, and the like. There is. These resins are generally injection-molded at a high temperature of 200 ° C. or higher, preferably 230 ° C. or higher. Therefore, it is effective to use the heat-resistant printing ink according to the present invention in the method of simultaneously performing injection molding and decoration at such a high temperature.
[0016]
【Example】
Examples of the present invention will be described below.
(Example 1)
[0017]
Polycarbonate resin which is a copolymer of the formulas (1) and (2) (Iupilon FPC2136 manufactured by Mitsubishi Gas Chemical Co., Inc.): 20 parts by weight, pigment: 10 parts by weight, antifoaming agent: 1 part by weight, cyclohexanone as a solvent: Printing ink was produced by mixing 30 parts by weight, 30 parts by weight of propylene glycol monomethyl ether acetate, and 150 parts by weight of Solvesso # 150.
[0018]
The ink was used for decorative printing on a polycarbonate film. The film thus printed was placed in an injection mold with the printing surface inside, and polycarbonate resin (Iupilon S-3000 manufactured by Mitsubishi Gas Chemical Co., Inc.) was melt injection molded at a cylinder temperature of 305 ° C.
[0019]
The decorative film was completely integrated with the molded product, and no blur or flow was observed in the decorated characters, and the clarity was maintained.
[0020]
(Example 2)
The resin to be injection-molded was a polycarbonate resin / ABS resin blend resin (Iupilon PM1210 manufactured by Mitsubishi Gas Chemical Co., Inc.), and the same procedure as in Example 1 was performed except that the cylinder temperature was 250 ° C.
[0021]
As a result, as in Example 1, a molded product in which the decorative film was completely integrated with the molded product was obtained, and the decorated characters were free from bleeding and flow, and the clarity was completely maintained.
[0022]
(Comparative Example 1)
The same procedure as in Example 1 was performed except that an acrylic resin was used instead of the polycarbonate resin as a binder for the printing ink.
The ink used for decorative printing produced a melt flow, and a molded product in which the decorative characters were difficult to read was obtained.
[0023]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a heat-resistant printing ink containing a polycarbonate resin as a binder, which does not require a complicated chemical structure unit and can be easily manufactured at low cost. In addition, by the method for producing a decorated resin product using this heat-resistant printing ink, even if a molten resin is injected at low cost and at a high temperature (230 ° C. or higher), the bleeding or flow (flow) of the decoration due to the heat effect, Or the decorative resin product without peeling can be obtained. Therefore, even when a resin that must be injection-molded at a high temperature is used, it is possible to manufacture a product that is clearly decorated.
Claims (3)
（但し、式（１）中、Ｒはメチル基。）
(In the formula (1), R is a methyl group .)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000109492A JP4158312B2 (en) | 2000-04-11 | 2000-04-11 | Method for producing heat-resistant printing ink and decorative resin product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000109492A JP4158312B2 (en) | 2000-04-11 | 2000-04-11 | Method for producing heat-resistant printing ink and decorative resin product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001294793A JP2001294793A (en) | 2001-10-23 |
| JP4158312B2 true JP4158312B2 (en) | 2008-10-01 |
Family
ID=18622178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000109492A Expired - Fee Related JP4158312B2 (en) | 2000-04-11 | 2000-04-11 | Method for producing heat-resistant printing ink and decorative resin product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4158312B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003095328A1 (en) * | 2002-05-07 | 2003-11-20 | Teijin Chemicals, Ltd. | Method of preserving dried polycarbonate resin, and method of wet-molding resin |
| JP4052647B2 (en) | 2003-06-30 | 2008-02-27 | 帝国インキ製造株式会社 | Printing ink and decorative sheet using the same |
| JP5286654B2 (en) * | 2006-09-08 | 2013-09-11 | 三菱瓦斯化学株式会社 | Heat resistant printing ink |
| DE102008023499A1 (en) | 2008-05-14 | 2009-11-19 | Bayer Materialscience Ag | Printing ink or printing varnish, coated laminate therewith and process for producing a laminate |
| JP6340811B2 (en) * | 2014-02-18 | 2018-06-13 | 三菱瓦斯化学株式会社 | Polycarbonate resin composition and heat resistant printing ink using the same |
-
2000
- 2000-04-11 JP JP2000109492A patent/JP4158312B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001294793A (en) | 2001-10-23 |
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