Density Measurement
Volumetric efficiency defines the ratio between the actual solid volume of flax fibres and the total space occupied by those fibres inside a defined bale or shipping container. This packing fraction determines the bulk density of raw material during transit from the retting facility to the spinning plant. The measurement identifies the amount of air space versus cellulose within a compressed unit.
High values indicate low porosity and increased mechanical stability for heavy-duty storage, while low values suggest loose, irregular stacking prone to instability under shifting weight.
Calculation Procedure
Analysts determine the property by dividing the mass of the dry flax by the product of the true density of the fibre and the total volume of the container. Technicians weigh the entire batch before applying a moisture correction factor to isolate the dry mass of the stalk. Fibre density relies on the specific gravity of raw cellulose, which stays consistent for standard grades regardless of the harvest year.
Displacement methods verify the volume of the bale, ensuring the measurement reflects the external geometry of the pressed unit rather than the voids inside individual stalks.
Logistical Consequence
Cargo planners monitor these figures to calculate the physical limits of containers during long-distance maritime freight. Consistent numbers assist the mill in forecasting raw material inventories because the value directly dictates the number of bales that fit within the square meter floor area of a warehouse. Variations in the fraction often signal poor primary pressing at the baling station, which necessitates manual sorting or re-baling to meet the safety requirements of the shipping line.
Dense bales reduce the risk of structural collapse inside the container during extreme weather.
