The wood used in paper making often comes into the manufacturing process with a moisture content of above 60% . Without the use of intelligent moisture meters at several points in the manufacturing process, the likelihood of clogged equipment, loss of product, and inefficient processes is extremely high.
When dealing with such high moisture content in the raw material used to create the end product, care must be taken to ensure the process is properly controlled. With near infrared (NIR) sensors, instant moisture results display without waiting for time consuming lab results, allowing more quick and accurate measurement of what’s happening on the manufacturing line in real-time. And in the paper industry, where high moisture content demands careful observation, that real-time feedback is paramount to an operation’s success.
When the wood pulp (chips) are mixed with other chemicals and fed into a paper machine where it creates a web, the moisture content is often still clocking in at over 60%. Because of this, the moisture content must be carefully monitored in order to control vacuum pressure as the water is removed.
If the web is too wet, it is very fragile and could break, causing a shutdown in process to clean all machinery, or putting undue stress on drying cylinders.
The temperature of these cylinders must be appropriate to reduce the moisture content from the web’s entering 20-30% to the necessary percentage to meet quality control standards (typically, 5-7% for most paper). Utilizing NIR meters at this point in the process allows for accurate and instantaneous, non-destructive measurement. The data from these real-time measurements can be utilized through our networked sensors to make automatic adjustments without operator control to optimize the process and increase final product quality as well as throughput.
Our scanframe allows the OMNIR: On-Line Near Infrared Sensor, and its advanced software, to take multiple-point readings of moisture and/or coat weight across the entire paper web, rather than just a fixed point. Having this real-monitoring can help your operation maintain higher standards of quality control by reducing waste and driving efficiency.Learn More