How to remove air-coated yarn?

The core methods for dismantling air-covered yarn are physical peeling, temperature softening, or dissolving the adhesive.

The choice of method for dismantling air-covered yarn mainly depends on the bonding method between the outer covering material and the core yarn. This type of process is commonly encountered in the textile industry, where the core yarn is often spandex or elastic fiber, and the outer layer is wrapped with materials such as nylon or polyester, forming the covering effect through compressed air winding.

Physical Peeling Method: If the covering yarn is not fixed by chemical adhesives, the outer layer can be pried open using pointed tweezers or a peeling hook. First, locate the end of the yarn, and slowly pull it out in the opposite direction of the covering, keeping the core yarn perpendicular to the force during the process to avoid breaking the core. This method is suitable for manual processing; wear non-slip gloves to prevent cuts.

Heat Treatment Softening Method: When the covering layer is bonded with hot melt adhesive, it can be locally heated to 80-120℃ (adjust according to the material's melting point). Use a household hair dryer or industrial heat gun to evenly sweep over the covered section. After the adhesive softens, quickly peel off the outer layer while it is still hot. Temperature control is crucial; overheating can cause the core yarn to lose its elasticity.

Dissolution and Separation Method: For covered yarns using chemical adhesives (such as polyurethane glue), the bonded areas can be soaked in acetone or ethyl acetate solvent. After the adhesive swells, rinse and separate the yarn. During this operation, a well-ventilated environment and protective equipment must be worn, and the effect of the solvent on the core yarn material must be tested first.

The structural characteristics of air-covered yarns make them commonly used in sportswear, medical bandages, and other fields. Preserving the core yarn during disassembly improves the material's reusability. For nylon/PU composite layers, a gradient disassembly method is recommended: first mechanically separate the outer nylon layer, then specifically treat any remaining adhesive to minimize loss.