Quality Control for Paper & Pulp Operations
In the pulp and paper industry, several quality specifications are monitored to ensure the final product meets the required standards. Moisture content of pulp and paper is critical for maintaining product quality and consistency. Excessive moisture can lead to poor printability, while low moisture content can cause brittleness and cracking. KPM offers NIR instrumentation for moisture analysis throughout the papermaking process.
Moisture and Compositional Analysis of Pulp for Papermaking
When NIR analyzers are integrated into key areas of a production process to continuously monitor or control processes on the production line, the challenge of meeting the high quality standards with a highly variable product is all but removed. Moisture levels influence process efficiency, energy usage, waste management and quality, and measuring moisture with NIR ensures a usable product and reduces energy costs.
Pulp refers to a type of fibrous material that is made by separating cellulose fibers from sources such as wood, fiber crops, waste paper, etc. This can be done through chemical or mechanical means. When mixed with water and other chemical or plant-based additives, pulp becomes the primary raw material used in the papermaking industry and for producing various other paper products. Moisture examination of pulp ahead of the bailer using NIR ensures a smoother, less costly papermaking process.
Paper is hydroscopic (moisture absorbent) and the moisture level is usually between 3 and 6% in its finished state, depending on surrounding humidity. It is costly to either add or remove moisture in the next stage (converting process), so the more accurate the measurements and controls, the more efficiency gained. Measurement and control of coat weight thickness on paper reduces waste and improves coating uniformity. NIR (at-line or in-line) is an ideal non-destructive tool for fast, accurate moisture measurement and is an economical alternative to highly-regulated nuclear gauging.