In order to protect the printing pattern of the label and improve the quality of the label, many self-adhesive labels have chosen the surface finishing treatment such as laminating, glazing and bronzing after printing.

濟(jì)南標(biāo)簽印刷UV上光工藝注意事項(xiàng)

Notes on UV glazing process of Jinan label printing

一、標(biāo)簽印刷的 UV 上光

1、 UV glazing for label printing

上光工藝主要應(yīng)用于鏡面銅版紙、 銅版紙類標(biāo)簽的表面涂布, 目的是增加其表面的光澤 度,并達(dá)到防污、防潮濕、保護(hù)圖紋的作用。根據(jù)加工方式,不干膠標(biāo)簽材料的上光分為單 張紙上光和卷筒紙上光,其中卷筒紙上光是不干膠標(biāo)簽印刷工藝中較普遍采用的方法。

Glazing process is mainly applied to the surface coating of mirror coated paper and coated paper labels, with the purpose of increasing the surface gloss, and achieving the function of antifouling, anti moisture and protecting the pattern. According to the processing method, the self-adhesive label material glazing can be divided into sheet paper glazing and web paper glazing, in which web glazing is a common method in the self-adhesive label printing process.

卷筒紙標(biāo)簽的上光是在輪轉(zhuǎn)型標(biāo)簽機(jī)上進(jìn)行的。 目前普遍采用 UV 上光工藝, 即:在 印刷 后的圖紋表面均勻地涂布一層 UV 上光油。 對于水基墨柔印標(biāo)簽, 上光是必不可少的 一道工序。

Web label glazing is carried out on the wheel transformation label machine. At present, UV glazing process is widely used, that is, a layer of UV glazing oil is evenly coated on the surface of the printed pattern. For water-based ink flexo label, glazing is an essential process.

二、進(jìn)行 UV 上光工藝應(yīng)注意以下有關(guān)事項(xiàng):

2、 UV glazing process should pay attention to the following matters:

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1、上光油質(zhì)量的檢定

1. Quality verification of glazing oil

UV 上光油品種多,都有一定的儲存周期,并且對環(huán)境有一定的要求,所以,使川用前 應(yīng)檢查一下上光油的顏色及其定量涂布后的干燥情況, 以及添加劑的匹配情況, 還要注意觀 察與所用的印刷油墨是否有反應(yīng)。一般要求行上光試驗(yàn),而后再投入正常生產(chǎn)。

There are many kinds of UV varnish, which have a certain storage cycle, and have certain requirements for the environment. Therefore, before using in Sichuan, we should check the color of the varnish and the drying condition after quantitative coating, as well as the matching of additives. We should also pay attention to whether there is any reaction with the printing ink. Generally, it is required to conduct glazing test first, and then put into normal production.

濟(jì)南標(biāo)簽印刷

Jinan label printing

2、上光油的厚度

2. Thickness of varnish

UV 上光油的流平特性不如溶劑型上光油,若涂布量太大就會使上光后的表面出現(xiàn)條 紋, 影響光反射效果。 涂布量過大還會使上光油干燥不徹底, 僅表層干燥, 造成復(fù)卷后粘連。

The leveling characteristics of UV glazing oil is not as good as solvent varnish, if the coating amount is too large, it will make the surface after glazing stripes, affecting the light reflection effect. Too much coating will make glazing oil drying is not complete, only surface drying, resulting in rewinding adhesion.

3、上光油粘度和表面張力

3. Viscosity and surface tension of varnish

上光油的粘度對其流平特性、干燥速度、 表面光澤都有影響。 要根據(jù)不同的紙張, 調(diào)整 適合的粘度。 在調(diào)控粘度的同時, 還要注意上光油表面張力的變化情況。 要使上光油的表面 張力小于 印刷 品油墨層的表面張力,這樣,上光油才能完全潤濕上光表面,避免出現(xiàn)針眼、 條痕等質(zhì)量問題。

The viscosity of varnish has an effect on its leveling characteristics, drying speed and surface gloss. According to the different paper, adjust the appropriate viscosity. In the control of viscosity at the same time, but also pay attention to the change of surface tension. To make the surface tension of varnish is less than the surface tension of printing ink layer, in this way, varnish can completely wet the surface of polishing, avoid the appearance of pinholes, streaks and other quality problems.

4、速度、涂布量、壓力、烘干溫度

4. Speed, coating weight, pressure, drying temperature

上光涂布速度、 涂布量、 壓力和烘干溫度四者是互相制約的, 需根據(jù)不同的紙張表面對 上光油的潤濕、吸收情況,合理調(diào)整它們之間的關(guān)系。

Coating speed, coating weight, pressure and drying temperature are mutually restricted, and the relationship between them should be adjusted according to the wetting and absorption of different paper surface.

5、定期檢查 UV 烘干裝置

5. Check the UV drying device regularly

UV 烘干裝置中的紫外線燈管隨著使用時間的延長,有效功率在逐漸降低,一般 UV 燈 管的有效時間是 1000小時。 生產(chǎn)中應(yīng)定期檢測其有效功率, 當(dāng)使用時間接近 1000小時應(yīng)及 時更換。

The effective power of UV lamp in UV drying device decreases gradually with the extension of service time, and the effective time of general UV lamp is 1000 hours. Its effective power should be tested regularly in production, and it should be replaced in time when the service time is close to 1000 hours.

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To learn more about Jinan label printing production knowledge, please pay attention to our website update http://www.seven2000.com