Strength Loss
Reduction in the tensile resistance of spun linen yarn occurs when the cellulose polymer chains are damaged during chemical processing. This process of yarn tenacity degradation is closely monitored during the scouring and bleaching stages of linen manufacture. Technicians measure the tensile strength before and after the chemical bath to ensure that the fiber remains strong.
Maintaining the chemical concentrations within safe limits prevents the premature failure of the yarn during weaving.
Chemical Control
Alkaline scouring and hydrogen peroxide bleaching must be carefully controlled to prevent the chemical decomposition of the linen fiber’s crystalline regions. Excessive exposure to high temperatures or highly alkaline solutions accelerates yarn tenacity degradation, which leads to weak warp threads. Laboratory workers in Chinese finishing mills run fluid consistency tests to measure the degree of cellulose polymerization.
If the test results indicate severe damage, the processing parameters must be adjusted to protect the yarn. Documenting these chemical tests in the batch release report ensures that the fabric maintains its durability after multiple washing cycles.
Mechanical Consequence
Weaving efficiency drops when the tensile strength of the warp yarn is compromised by over-processing. Higher rates of yarn tenacity degradation result in frequent loom stoppages and fabric defects. Mill logs track these break rates to evaluate the safety of the bleaching methods.
Protecting the cellulose structure maintains high product durability.
