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首页> 外文期刊>Nordic Pulp & Paper Research Journal >Influence of different storage conditions on deinking efficiency of waterbased flexographic ink from model cellulose surfaces and sheets
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Influence of different storage conditions on deinking efficiency of waterbased flexographic ink from model cellulose surfaces and sheets

机译：不同储存条件对模型纤维素表面和片材制水型柔版油墨饮用效率的影响

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摘要

The influence of UV-light, temperature, atmospheric environment and storage time on the ink detachment of water-based flexographic ink printed on model cellulose surfaces was investigated using an impinging jet cell equipment. The printed surfaces were deinked using a NaOH solution (pH = 10) and the deinking process was monitored using a microscope equipped with a CCD camera. Images were collected at different time intervals during the detachment process and image analysis was used to quantify the ink detachment from the surface. Hand sheets, (the same pulp as used for model surface preparation) were also printed and stored under the same conditions, after which they were reslushed and deinked. The deinking efficiency of the recycled sheets was evaluated using brightness and ERIC (Effective Residual Ink Concentration) values. It was shown that UV-light had a negative effect on ink detachment both from the model cellulose surfaces and from the hand sheets. At storage temperatures of 55?, (dark conditions were used) a large negative effect was observed for the cellulose surfaces while only a small effect on the ink detachment could be seen for the hand sheets. Ink detachment from the hand sheets became more difficult when increasing the storage temperature above 55℃, as detected as a decrease in brightness of the recycled and deinked sheets. A further increase in the storage temperature to 105℃ gave poorer ink detachment efficiency than storage under UV-light for the hand sheets. Air had a more negative effect on ink detachment than nitrogen.
机译：使用撞击式喷射池设备研究了紫外线，温度，大气环境和存储时间对在模型纤维素表面上印刷的水性苯胺印刷油墨的油墨脱离的影响。使用NaOH溶液（pH = 10）对印刷的表面进行脱墨，并使用配备CCD相机的显微镜监控脱墨过程。在分离过程中以不同的时间间隔收集图像，并使用图像分析来量化油墨从表面的分离。手工纸（与用于模型表面处理的纸浆相同）也被印刷并在相同的条件下存储，然后重新粉刷和脱墨。使用亮度和ERIC（有效残留油墨浓度）值评估再生纸的脱墨效率。结果表明，紫外线对油墨从模型纤维素表面和手抄纸的剥离都有负面影响。在55℃的储存温度下（使用黑暗条件），对纤维素表面观察到了很大的不利影响，而对手抄纸而言，对油墨分离的影响很小。当将储存温度提高到55℃以上时，从手抄纸上剥离墨水变得更加困难，这可通过回收和脱墨的纸张亮度降低来检测。储存温度进一步提高到105℃，比手抄纸在紫外线下的脱墨效率差。空气比氮气对油墨分离的负面影响更大。

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