Greige Fabric Certification Scope and Restricted Chemical Testing Protocols
Greige fabric certification demands batch testing of sizing agents, spin finishes, and biocide residues before finishing treatments mask regulated chemicals.
Warp Slashing
Filament Encapsulation
Continuous liquid sizing application processes consolidate thousands of individual warp yarns into a uniform, protected yarn sheet ready for loom mounting. Weaving preparation departments execute warp slashing by passing parallel yarn ends through a heated aqueous size bath, squeezing excess liquor with rubber nip rollers, and drying the material over steam cylinders. Applying protective starch or synthetic polymer coatings elevates single yarn tensile strength and flattens protruding hairiness.
The finished weaver’s beam holds tightly wound, uniform warp yarns capable of surviving weaving abrasion.
Application Mechanism
Submerging warp sheets into hot size liquor reduces fluid viscosity, promoting quick chemical penetration into spun yarn structures. Performing warp slashing under controlled tension ensures equal elongation across every yarn end, preventing slack warp threads on the loom. Temperature-controlled drying cylinders solidify size films gradually, preventing skin formation that leads to yarn-to-yarn bonding during beam winding.
Quality Assessment
Online moisture sensors monitor residual dampness in the dry yarn sheet, adjusting steam cylinder temperatures automatically to maintain optimal moisture regain. Laboratory refractometers verify size bath solids concentration, ensuring consistent coat weight across entire production beams.
Processing Ceiling
Excessive drying temperatures bake starch films, rendering warp yarns brittle and difficult to desize during wet processing. High production speeds reduce size box immersion time, causing superficial surface coating without deep fiber core penetration.