Formation Quality and Basis Weight Uniformity
topic
Wetlaid formation quality is characterised by formation index measured by optical transmission scanning that quantifies the randomness and scale of basis weight variation in the formed web, with good formation having low formation index values from uniform fibre distribution and poor formation showing high values from fibre flocculation during slurry preparation or forming, with formation quality directly determining filtration uniformity and mechanical property consistency.
Role
Quantifies the fibre distribution uniformity that is the primary quality advantage of wetlaid over drylaid nonwovens for technical applications, with formation index measurement enabling process optimisation of slurry preparation, headbox design, and forming conditions that maximise fibre distribution uniformity for the specific fibre types processed, and providing the quality control metric for wetlaid nonwoven acceptance in filtration and battery separator applications.