JP2005200079A

JP2005200079A - Glass container

Info

Publication number: JP2005200079A
Application number: JP2004010135A
Authority: JP
Inventors: Mitsutoshi Otsuka; 満俊大塚
Original assignee: Toyo Glass Co Ltd
Current assignee: Toyo Glass Co Ltd
Priority date: 2004-01-19
Filing date: 2004-01-19
Publication date: 2005-07-28

Abstract

<P>PROBLEM TO BE SOLVED: To develop a glass container which uses an organic ink exhibiting less environmental load in printing on a glass container and on a label to be stuck to the glass container, in which the ink is not deteriorated. <P>SOLUTION: A printing layer printed in an organic ink is provided or a label printed in the organic ink is stuck on the outer surface of the glass container. Furthermore, a resin layer having an ultraviolet-cutoff function is formed by covering the printing layer or the label, so that the printing layer or the label is covered by the resin layer having the ultraviolet-cutoff function to protect the organic ink from ultraviolet rays, with no deterioration of the organic ink. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、外表面に有機系インキで印刷したガラス容器、及び外表面に有機系インキを印刷したラベルを貼付したガラス容器に関する。 The present invention relates to a glass container printed with organic ink on the outer surface and a glass container with a label printed with organic ink on the outer surface.

ガラスびんなどのガラス容器の外表面には、内容物を表示するなどの目的で印刷を施したり、ラベルを貼付することが行われている。このような場合、ガラス容器及びラベルへの印刷には、退色や変質の心配のない無機系インキを用いることが多かった。しかし、無機系インキはカドミウム、鉛などの重金属を含み、環境に悪影響を与えるおそれがある。 Printing or labeling is performed on the outer surface of a glass container such as a glass bottle for the purpose of displaying the contents. In such a case, for printing on a glass container and a label, an inorganic ink that does not cause discoloration or deterioration is often used. However, inorganic ink contains heavy metals such as cadmium and lead, which may adversely affect the environment.

一方、重金属を含まない有機系インキがあるが、これは紫外線によって退色などの変質を起こしやすいという問題があり、特に長期間紫外線の影響を受けるリターナブルびんには不向きとされていた。 On the other hand, there are organic inks that do not contain heavy metals, but this has the problem of fading easily due to ultraviolet rays, which makes them unsuitable for returnable bottles that are affected by ultraviolet rays for a long period of time.

なお、本件発明と関連する先行技術として、特許文献１及び３には感熱ラベルを覆って疎水性コーティング層を形成する技術が、特許文献２には熱硬化性樹脂被膜の上に有機インキの印刷層を形成し更にその上に熱硬化性樹脂被膜を形成する技術が開示されている。
特開２００３−１６５５４５号公報特開２００３−１６５５４６号公報特開２００３−２００９３３号公報 As prior arts related to the present invention, Patent Documents 1 and 3 disclose a technique for forming a hydrophobic coating layer covering a thermosensitive label, and Patent Document 2 discloses printing of organic ink on a thermosetting resin film. A technique for forming a layer and further forming a thermosetting resin film thereon is disclosed.
JP 2003-165545 A JP 2003-165546 A Japanese Patent Laid-Open No. 2003-200933

本発明は、ガラス容器への印刷、ガラス容器に貼付するラベルへの印刷に環境負荷の少ない有機系インキを用いると共に、リターナブルびんなどのように、長期間紫外線の影響を受けてもインキが退色などの変質を起こさないガラス容器を開発することを課題としてなされたものである。 The present invention uses an organic ink having a low environmental impact for printing on a glass container and printing on a label attached to the glass container, and the ink fades even if it is affected by ultraviolet rays for a long time such as a returnable bottle. The purpose of this study was to develop a glass container that would not cause any alteration.

本発明は、ガラス容器の外表面に有機系インキで印刷した印刷層を設け、さらに該印刷層を覆って紫外線遮断機能を有する樹脂層を形成したことを特徴とするガラス容器である。 The present invention is a glass container characterized in that a printed layer printed with an organic ink is provided on the outer surface of the glass container, and a resin layer having an ultraviolet blocking function is formed by covering the printed layer.

また本発明は、ガラス容器の外表面に有機系インキを印刷したラベルを貼付し、さらに該ラベルを覆って紫外線遮断機能を有する樹脂層を形成したことを特徴とするガラス容器である。 Further, the present invention is a glass container characterized in that a label printed with an organic ink is attached to the outer surface of the glass container, and a resin layer having an ultraviolet blocking function is formed by covering the label.

ガラス容器外表面の印刷層、又はラベルの印刷が有機系インキで行われているので、カドミウム、鉛などの重金属を含まず、環境に悪影響を与えるおそれがない。印刷層又はラベルは紫外線遮断機能を有する樹脂層で覆われるので、有機系インキが紫外線から保護され、退色など変質するおそれもない。 Since the printed layer on the outer surface of the glass container or the label is printed with organic ink, it does not contain heavy metals such as cadmium and lead, and there is no possibility of adversely affecting the environment. Since the printed layer or label is covered with a resin layer having an ultraviolet blocking function, the organic ink is protected from ultraviolet rays and there is no possibility of deterioration such as fading.

ガラス容器外表面への印刷方法に制限はないが、スクリーン印刷が最も一般的である。また、転写紙から転写することで印刷層を形成してもよい。ラベルの素材、ラベルを貼付するための糊も任意である。紫外線遮断機能を有する樹脂としては、可視光を通す透明性があって紫外線を遮断するものであれば任意であるが、例えばウレタン系樹脂などの任意の樹脂にセリウムなどの紫外線遮断作用のある物質を配合したものを用いることができる。紫外線遮断機能を有する樹脂層の形成は、コーティング、刷毛塗り、ディッピングなど任意の方法で樹脂を塗布し、乾燥させる。また、紫外線遮断機能を有する樹脂のフィルムを貼付してもよい。 There is no restriction on the printing method on the outer surface of the glass container, but screen printing is the most common. Moreover, you may form a printing layer by transferring from a transfer paper. The material of the label and the glue for attaching the label are also arbitrary. The resin having an ultraviolet blocking function is arbitrary as long as it is transparent to visible light and blocks ultraviolet rays. For example, a resin having an ultraviolet blocking effect such as cerium on any resin such as urethane resin. Can be used. The resin layer having an ultraviolet blocking function is formed by applying a resin by an arbitrary method such as coating, brushing or dipping and drying. Further, a resin film having an ultraviolet blocking function may be attached.

（実施例）
赤色のエポキシ系熱硬化型インキをガラスびんの胴部にスクリーン印刷し、１８０℃、２０分で硬化させ、印刷層を形成した。更に、この印刷層を含むガラスびんの胴部全体に紫外線遮断機能を有するウレタン系樹脂をコーティングし、１７０℃で２０分硬化させて樹脂層を形成し、実施例のガラスびんを得た。図１はこの紫外線遮断機能を有するウレタン系樹脂の光透過率曲線で、可視光を良く透過し、ほぼ無色透明であるが、４００ｎｍよりも短い波長の紫外線はほとんど透過しないものである。 (Example)
A red epoxy thermosetting ink was screen printed on the body of a glass bottle and cured at 180 ° C. for 20 minutes to form a printed layer. Further, the entire body of the glass bottle including the printed layer was coated with a urethane resin having an ultraviolet blocking function, and cured at 170 ° C. for 20 minutes to form a resin layer. Thus, the glass bottle of the example was obtained. FIG. 1 is a light transmittance curve of this urethane resin having an ultraviolet blocking function, which transmits visible light well and is almost colorless and transparent, but hardly transmits ultraviolet light having a wavelength shorter than 400 nm.

（比較例）
前記実施例と同様に、ガラスびんの胴部に印刷層を形成し、紫外線遮断機能を有する樹脂層を形成しない比較例のガラスびんを作成した。 (Comparative example)
As in the previous example, a printing layer was formed on the body of the glass bottle, and a glass bottle of a comparative example in which a resin layer having an ultraviolet blocking function was not formed was prepared.

実施例及び比較例のガラスびん（紫外線照射なし）の色調をミノルタ製色彩色差計ＣＲ−３２１で測定した。また、実施例及び比較例のガラスびんを、スガ試験機製サンシャインウェザーメータで、３００ｈ（２年相当）の紫外線照射を行った後、同様に色調を測定した。その結果を表１に示す。

The color tone of the glass bottles of Examples and Comparative Examples (without ultraviolet irradiation) was measured with a Minolta color difference meter CR-321. The glass bottles of Examples and Comparative Examples were subjected to UV irradiation for 300 h (equivalent to 2 years) with a sunshine weather meter manufactured by Suga Test Instruments, and then the color tone was measured in the same manner. The results are shown in Table 1.

表１において、「Ｌ」「ａ」「ｂ」は、それぞれハンターＬａｂ表色系で測定した数値である。ハンターＬａｂ表色系は、光電色彩計（刺激値直読方法）で直読するのに便利なものとして、ハンター（R. S. Hunter）が１９４８年に提案した均等色空間を用いた表色系である。「紫外線照射なし」と「紫外線照射２年相当」との差である「変化量」の絶対値が小さいほど、退色が少ないこととなる。実施例は、比較例と比べて「Ｌ」「ａ」「ｂ」の変化量（絶対値）が著しく小さく、紫外線による退色がきわめて少ないことが明らかとなっている。 In Table 1, “L”, “a”, and “b” are numerical values measured in the Hunter Lab color system, respectively. The Hunter Lab color system is a color system using a uniform color space proposed by Hunter (R. S. Hunter) in 1948 as convenient for direct reading with a photoelectric colorimeter (stimulus value direct reading method). The smaller the absolute value of “change amount”, which is the difference between “no UV irradiation” and “equivalent to two years of UV irradiation”, the less fading occurs. In the example, it is clear that the amount of change (absolute value) of “L”, “a”, and “b” is extremely small compared with the comparative example, and fading due to ultraviolet rays is extremely small.

実施例で用いた紫外線遮断機能を有するウレタン系樹脂の光透過率曲線である。It is the light transmittance curve of the urethane type resin which has the ultraviolet-ray blocking function used in the Example.

Claims

A glass container, wherein a printed layer printed with an organic ink is provided on an outer surface of a glass container, and a resin layer having an ultraviolet blocking function is formed by covering the printed layer.

A glass container, wherein a label printed with an organic ink is attached to the outer surface of a glass container, and a resin layer having an ultraviolet blocking function is formed by covering the label.