Dehaired down Yield Estimation from Raw Cashmere Core Samples
Tube core sampling and laboratory card dehairing determine clean down yield, adjusting raw lot costs against moisture regain and industrial carding losses.
Aqueous Scouring
Processing Method
Liquid immersion removes spinning oils, soil, and processing waxes from textile substrates to ensure subsequent chemical affinity. Aqueous scouring utilizes water, detergents, and alkalis to emulsify hydrophobic residues into a stable suspension. Mechanical agitation provides the necessary energy to displace contaminants from fibre surfaces before rinsing cycles stabilize the material.
Chemical Action
Detergent surfactants reduce surface tension to penetrate dense yarn structures while alkalis saponify natural fats. These active agents prevent redeposition by maintaining suspended particulates in the bath until draining occurs. High temperature promotes molecular kinetic energy, which accelerates the release of stubborn wax coatings from cotton or wool fibres.
Process Control
Consistent temperature regulation prevents fibre degradation during extended exposure to caustic reagents. Operators verify substrate cleanliness through residual oil extraction testing before proceeding to dyeing or bleaching stages. Monitoring pH levels protects natural polymers from alkaline damage while ensuring the bath chemistry remains sufficiently aggressive to lift oils.
Operational Boundary
Contamination removal efficiency varies according to fibre type, bath ratio, and the chemical nature of the lubricants present on the raw stock. Synthetic fibres require lower temperatures than natural fibres to avoid structural deformation during the cleaning cycle. Batch exhaustion rates determine the volume of effluent discharge which necessitates secondary treatment for compliance with environmental discharge regulations.