Quantifying Core Sheath Shear Slip in Jet Processed Stretch Fabrics under Extended Static Load
Exceeding 3.5 elastane draft without heat-setting crosslinking causes sheath slip under prolonged static load.
Jet Dyeing Venturi
Fluid Accelerator
Converging-diverging conduits within a dyeing machine use the Bernoulli principle to accelerate dye liquor and transport fabric through the system. The jet dyeing venturi creates a high-velocity stream that carries the rope of cloth without the need for mechanical rollers. This design minimizes surface abrasion on delicate synthetic fabrics while ensuring rapid liquor exchange.
Pressure Transformation
Narrowing the diameter of the pipe forces the fluid to increase in speed as the static pressure drops. This suction effect pulls the fabric into the main transport tube. Proper alignment of the jet dyeing venturi prevents tangles and ensures the fabric moves at a constant rate during the heating cycle.
High-intensity Leveling
High-intensity turbulence generated at the exit point of the nozzle promotes even distribution of dyes across every fibre. Without this rapid mixing, the fabric might show unlevelness or blotches. Modern machines allow for interchangeable components to match the flow characteristics to the weight and density of the specific fabric batch.
The geometry of the throat dictates the maximum fabric speed possible without causing surface damage.
Energy Efficiency
Lower liquor ratios become possible when the system relies on efficient fluid transport rather than total immersion. This reduction in water volume lowers the energy required for heating and chemical consumption. Efficient operation depends on maintaining a clean internal surface to avoid flow disruptions or snags.