JPS61225221A - Ultraviolet curing of coating film - Google Patents
Ultraviolet curing of coating filmInfo
- Publication number
- JPS61225221A JPS61225221A JP60066103A JP6610385A JPS61225221A JP S61225221 A JPS61225221 A JP S61225221A JP 60066103 A JP60066103 A JP 60066103A JP 6610385 A JP6610385 A JP 6610385A JP S61225221 A JPS61225221 A JP S61225221A
- Authority
- JP
- Japan
- Prior art keywords
- coating film
- cold air
- ultraviolet
- ultraviolet curing
- ultraviolet rays
- 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
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、塗膜の紫外線硬化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 method for curing coating films with ultraviolet light.
〈従来の技術〉
種々の物品にその表面の保護のために塗膜を設けること
が行われている。<Prior Art> Various articles are coated with coatings to protect their surfaces.
例えば、プラスチックは軽量、耐薬品性、透明性等に優
れているので、その特性を生かして種々の用途に利用さ
れている。その例として、例えば、メガネレンズ、風防
カバー、プリンターカバー、ショーケース用カバー、ホ
イルキャップ、更にはスキー等がある。For example, plastics are lightweight, have excellent chemical resistance, and are transparent, so they are used for a variety of purposes by taking advantage of these characteristics. Examples include eyeglass lenses, windshield covers, printer covers, showcase covers, foil caps, and even skis.
しかしながら、これ等のプラスチックは、一般的に硬度
が小さいので、傷が付き易いという欠点がある。このた
め、これ等の製品の表面に硬い膜を形成して優れた耐擦
傷性を与えるようにすることが行われている。However, since these plastics generally have low hardness, they have the disadvantage of being easily scratched. For this reason, hard films are formed on the surfaces of these products to provide them with excellent scratch resistance.
そして、このような膜の形成には、短時間で処理が済む
こと、加熱が必要でないこと、高不揮発分又は無溶剤で
塗装できること等の利点から、紫外線硬化塗料が用いら
れるようになってきている。Ultraviolet curing paints have come to be used to form such films due to their advantages such as short processing times, no need for heating, and the ability to apply with high non-volatile content or without solvents. There is.
〈発明が解決しようとする問題点〉
ところが、上記方法で得られる塗膜は、縮みよる外観不
良が生じることがある。このような不良の生ずる原因と
しては、塗料の不均一な硬化が考えられる。<Problems to be Solved by the Invention> However, the coating film obtained by the above method may have poor appearance due to shrinkage. Non-uniform curing of the paint is considered to be the cause of such defects.
尚、上記の紫外線硬化方法では、光増悪剤を含む硬化組
成物に紫外線が照射されることによってラジカルが生成
し、引き続きモノマーの成長反応が起こり硬化するもの
、主としてジアゾニウム塩を用いカチオン重合を利用す
るものもある。In addition, in the above-mentioned ultraviolet curing method, radicals are generated by irradiating the curing composition containing the photo-enhancing agent with ultraviolet rays, followed by a monomer growth reaction and curing, and diazonium salt is mainly used and cationic polymerization is used. Some do.
（問題点を解決するための手段〉
本発明は、上記のような従来の紫外線硬化方法による塗
膜の改良、特に、縮みの問題を解決しようとするもので
あり、その特徴とするところは、先に述べた紫外線硬化
処理において、紫外線照射を冷空気流中で行うことにあ
る。(Means for Solving the Problems) The present invention aims to improve the coating film by the conventional ultraviolet curing method as described above, and in particular to solve the problem of shrinkage.The present invention is characterized by: In the UV curing process mentioned above, the UV irradiation is carried out in a cold air stream.
次に、被塗膜物としてアクリル板に紫外線硬化塗料（ア
クリルオリゴマーを主成分としたもの）を用いた場合に
ついて述べる。Next, a case will be described in which an ultraviolet curing paint (based on acrylic oligomer) is used on an acrylic plate as a coating material.
例えば、アクリル樹脂性メガネレンズをフックで吊り下
げ、順次移動させ、このレンズの表面に前記紫外線硬化
塗料をデツピングや、スプレー等によって塗布する。For example, an acrylic resin eyeglass lens is hung from a hook and moved one after another, and the ultraviolet curing paint is applied to the surface of the lens by dipping, spraying, or the like.
次いで、溶剤を揮発させ、当該レンズに対して、方側或
いは両側、更に必要であれば上下左右等の全方位に設け
た紫外線照射装置から、照射量５００〜３０００ｍＪ／
ｃｍ”で紫外線を照射する。Next, the solvent is evaporated, and the lens is irradiated with an irradiation amount of 500 to 3000 mJ from an ultraviolet irradiation device installed on one side or both sides, and if necessary, in all directions such as top, bottom, left, and right.
cm” and irradiate with ultraviolet light.
そして、この時、冷空気流を、好ましくは前記紫外線照
射装置の方向から吹き付ける。この冷空気は一り０℃〜
１０ど程度のもので、その流速は１”５ｍ／ｓｅｃであ
る。At this time, a cold air stream is preferably blown from the direction of the ultraviolet irradiation device. This cold air is 0℃~
10, and its flow velocity is 1"5 m/sec.
温度、流速が前記範囲の場合、紫外線の照射効率が良好
で、冷却効果（均一冷却）もよく、そして、流速も適当
であるから塗膜と接触する酸素量が少な（なり、これに
より酸素によるラジカル重合の阻害の程度が下がり、不
均一な硬化が少なくなるので、縮みの発生が防止される
。When the temperature and flow rate are within the above ranges, the irradiation efficiency of ultraviolet rays is good, the cooling effect (uniform cooling) is also good, and since the flow rate is also appropriate, the amount of oxygen that comes into contact with the coating film is small (this results in a reduction in the amount of oxygen caused by oxygen). Since the degree of inhibition of radical polymerization is reduced and uneven curing is reduced, the occurrence of shrinkage is prevented.
尚、本発明においては、上記温度、流速等の他に、紫外
線硬化方法で行われている種々の他の工程条件も加味し
て最適処理すること勿論である。In addition, in the present invention, in addition to the above-mentioned temperature, flow rate, etc., various other process conditions used in the ultraviolet curing method are of course taken into account for optimum treatment.
く作用〉
本発明では、上記のように縮みの発生が防止され、そし
て、得られた被塗膜物は、透明度、表面光沢性に優れ、
外観の良好な塗膜となる。Effect> In the present invention, the occurrence of shrinkage is prevented as described above, and the obtained coated film has excellent transparency and surface gloss,
The result is a coating film with a good appearance.
（実施例〉
第１表の紫外線硬化組成物を用いて、温度、流速を変え
て、本発明を実施したところ、塗膜の結果は、第２表の
如くであった（実施例１、実施例２）。尚、参考までに
、本発明条件を満たさないものを比較例として示しであ
る。(Example) When the present invention was carried out using the ultraviolet curable composition shown in Table 1 and changing the temperature and flow rate, the results of the coating film were as shown in Table 2 (Example 1, Example 2) For reference, a comparative example that does not satisfy the conditions of the present invention is shown.
第１表
第２表
〈発明の効果）
以上のように本発明によれば、従来のこの種紫外線硬化
方法での問題点の一つであった塗膜の縮みの問題を解消
し、縮みのない優れた塗膜を得ることができる。Table 1 Table 2 (Effects of the Invention) As described above, according to the present invention, the problem of shrinkage of the coating film, which was one of the problems with the conventional ultraviolet curing method of this type, can be solved, and the shrinkage can be reduced. It is possible to obtain an excellent coating film.
Claims (1)
紫外線硬化方法。A method for curing paint films with ultraviolet rays, which comprises irradiating ultraviolet rays in a stream of cold air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60066103A JPS61225221A (en) | 1985-03-29 | 1985-03-29 | Ultraviolet curing of coating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60066103A JPS61225221A (en) | 1985-03-29 | 1985-03-29 | Ultraviolet curing of coating film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61225221A true JPS61225221A (en) | 1986-10-07 |
Family
ID=13306213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60066103A Pending JPS61225221A (en) | 1985-03-29 | 1985-03-29 | Ultraviolet curing of coating film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61225221A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008513341A (en) * | 2004-09-16 | 2008-05-01 | ユナイテッド・ステイツ・ジプサム・カンパニー | Flexible and rollable cementitious membrane and method for producing the same |
-
1985
- 1985-03-29 JP JP60066103A patent/JPS61225221A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008513341A (en) * | 2004-09-16 | 2008-05-01 | ユナイテッド・ステイツ・ジプサム・カンパニー | Flexible and rollable cementitious membrane and method for producing the same |
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