Evaluation of Polyvinyl Alcohol Size Pick up on Flax Fibers
Optimal PVA size pick-up on flax warps ranges from 8.0 to 9.0 percent dry weight, balancing yarn friction resistance with hot-water desizing washability.
Refractometer Monitoring
Concentration Control
Liquid concentration measurement in wet textile processing utilizes the bending of light to determine the amount of dissolved solids in a solution. During the boiling and scouring of linen yarns, refractometer monitoring provides real-time tracking of the pectin and hemicellulose concentrations in the bath. This check ensures that the rinsing cycles are executing correctly.
Operators use portable optical devices to take readings at fixed intervals.
Bathing Optimization
Chemical consumption in the scouring department is closely tied to the density of the wash liquor. Through refractometer monitoring, the mill can determine when the wash water is saturated and must be discharged. This prevents the reuse of dirty water that would otherwise redeposit dissolved gums onto the clean yarn.
Waste Record
Environmental compliance and resource efficiency require accurate logs of the wastewater before it is sent to the treatment plant. The refractometer monitoring data is recorded on the daily shift log to verify the efficiency of the extraction. These measurements help the mill calculate the volume of dissolved organic carbon being discharged from the scouring line.
This data is reviewed during annual environmental audits to ensure the facility remains within its permitted chemical limits. In addition, the reports are shared with the engineering team to help them design more efficient water recycling systems.