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首页> 外文期刊>Measurement >On-site evaluation method for the nonstick properties of paper machine drying cylinder coating materials-A description of the methodology and two case studies
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On-site evaluation method for the nonstick properties of paper machine drying cylinder coating materials-A description of the methodology and two case studies

机译：造纸机干燥筒涂料不粘性能的现场评估方法-方法学说明和两个案例研究

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摘要

Paper raw materials contain impurities, such as waxes, coating binders, hot melts and pressure-sensitive adhesives, that have a tendency to attach to the surfaces of machinery during paper production. Drying cylinders located at the beginning of the drying section are in an especially challenging position because sticky materials can easily transfer from the paper web to the hot cylinder surfaces at this point. Usually, one to four drying cylinders are coated with a nonstick coating material in order to decrease contamination. The nonstick properties of coating materials are at their best when the coatings are new, but their performance usually decreases as the materials age. To date, there is no practical method available for the on-site evaluation of the nonstick properties of coating materials or a method to monitor the condition of the coating during its life cycle. A new practical method for the on-site evaluation of nonstick cylinder coating materials has been developed. This method also provides the opportunity to compare the performance of different drying cylinder coating materials. The analysis is performed using an adhesive tape attached to a clean cylinder surface. The tape is immediately peeled off of the surface at a constant speed and peel angle. The temperature compensation is used to facilitate the comparison of surfaces at different temperatures. The force required to peel off the adhesive tape is monitored with a force meter. Our results show a linear relationship between the release force and the nonstick qualities of the coating. In this paper, a method for testing drying cylinder coatings and the results of mill tests are presented.
机译：纸原料包含杂质，例如蜡，涂料粘合剂，热熔胶和压敏粘合剂，这些杂质在造纸过程中往往会附着在机械表面。位于干燥部分开始处的干燥筒处于特别具有挑战性的位置，因为此时粘性材料很容易从纸幅转移到热筒表面。通常，一到四个干燥筒涂有不粘涂层材料，以减少污染。当涂料是新涂料时，涂料的不粘性能最佳，但是随着材料的老化，它们的性能通常会下降。迄今为止，尚无用于现场评估涂料不粘性能的实用方法，也没有监测涂料在其生命周期中状况的方法。已经开发出一种新的实用方法，用于现场评估不粘滚筒涂料。该方法还提供了机会来比较不同干燥筒涂料的性能。使用附着在干净圆柱表面上的胶带进行分析。立即以恒定的速度和剥离角度将胶带从表面剥离。温度补偿用于促进不同温度下的表面比较。用力计监测剥离胶带所需的力。我们的结果显示了涂料的释放力和不粘质量之间的线性关系。本文介绍了一种测试干燥滚筒涂料的方法以及轧机测试的结果。

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