Mass Reduction
Gravimetric loss of non-cellulosic constituents during hot alkali treatment of twisted strands establishes purified linear density prior to wet spinning. Chemical boiling removes pectins from intercellular matrices to soften technical fibers. Laboratory testing records register flax roving weight loss by comparing dried samples before and after caustic soda boiling.
The measurement defines the exact transition between raw mass and refined substrate.
Chemical Scouring
Mill boiling kettles apply sodium hydroxide solutions at elevated temperatures to break down pectin bonds within the twisted roving packages. As the liquor circulates through the perforated stainless steel spools, flax roving weight loss accelerates during the first thirty minutes of treatment. Insufficient mass reduction leaves rigid fiber bundles that resist attenuation on wet ring spinning frames.
Temperature logs and titration records document chemical consumption to maintain uniform liquor strength across batch charges.
Yield Impact
Excess removal of binding matrix weakens structural integrity within the strand and causes slubbing during wet drafting. When flax roving weight loss exceeds twenty percent, elementary fibers slip past each other without resistance, leading to yarn unevenness and high breakage rates. Processing standards establish acceptable mass loss limits between twelve and eighteen percent depending on targeted yarn count.
Quality control certificates validate final mass loss before approving roving bobbins for transfer to the spinning room. Over-boiled material generates waste in spinning troughs, decreasing output and raising production cost.
