The effect of the impingement air drying on print mottle and other coated paper properties
The effect of the impingement air drying on print mottle and other coated paper properties
复制标题
冲击空气干燥对印刷斑点和其他涂布纸性能的影响
DOI：
10.1016/j.applthermaleng.2004.03.015
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发表时间：
2004
影响因子：
6.4
通讯作者：
M. Hendrickson
中科院分区：
文献类型：
--
作者：
P. Rajala;N. Milosavljević;H. Kiiskinen;M. Hendrickson
本文研究了有效的初始冲击干燥（单面高强度空气冲击干燥）对刮刀涂布纸质量的影响，并与IR（红外）干燥进行了比较。一个专门设计的1.31米长的冲击式空气干燥装置安装在中试涂布机涂布站下游2米处，以实现更有效的纸张干燥。在冲击式干燥机装置中测试了使用三种冲击温度（300、450和550 °C）和三种冲击速度（25、40和60 m/s）的不同组合的不同干燥策略，以确定干燥对纸张质量的影响。干燥效果进行了比较，获得了两个行的电气IR在同一位置。研究结果表明，随着干燥功率的增加，返流斑点减少。涂布样品的纸张质量参数、光泽度和平滑度均优于空气干燥。本研究的有趣发现是在涂布WF（无木）纸的固结阶段以高干燥速率改善了斑驳。干燥部配置有效的冲击干燥单元直接在涂层站后表现出良好的性能，并提出了作为一个可能的解决方案，为未来的干燥机设计。
The objective of this work is to study the influence of effective initial impingement drying (one-sided high intensity air impingement drying) on the quality of blade-coated paper and to compare it with IR (infrared) drying. A specially designed 1.31 m-long impingement air dryer unit was installed 2 m downstream of the coating station of the pilot coater for more efficient paper drying. Different drying strategies using different combinations of three impingement temperatures (300, 450 and 550 °C) and three impingement velocities (25, 40 and 60 m/s) were tested in the impingement dryer unit to determine the influence of drying on paper quality. Drying effects are compared with those obtained with two rows of an electrical IR at same position. The results of the investigation indicate that backtrap (BT) mottle was reduced with increasing drying power of the impingement dryer. The paper quality parameters, gloss and smoothness of the coated samples were better with air-drying than IR drying. The interesting finding of this study is the improvement of mottle with a high drying rate in the consolidation phase for coated WF (wood-free) paper. Drying section configuration with effective impingement drying unit directly after the coating station showed good performance and is proposed as a possible solution for the future dryer designs.