Quantifying Anti Friction Lubricant Protection Limits for Elastane Cores under High Drag Jet Processing
Sustaining a 1.8 percent ester lubricant film on elastane cores prevents elastomeric rupture when jet nozzle pressure exceeds 2.2 bar.
Amino Siloxane
Chemical Classification
Silicon-based finishing agents containing amine functional groups represent the primary class of softening compounds used on high-end cellulosic and synthetic fabrics. When applied in mill finishing, amino siloxane adsorbs onto the fiber surface to form a highly flexible film. This layer provides a soft feel.
Emulsion Chemistry
Aqueous formulations usually contain the silicone polymer in a microemulsion state to ensure deep penetration into the yarn structure. Since amino siloxane carries a positive charge, it exhibits high affinity for negatively charged fibers like cotton and wool. This electrostatic attraction ensures the softener remains on the fabric after multiple laundry cycles.
Textile Modification
Fabric properties undergo durable changes when treated with these silicone emulsions. The application of amino siloxane reduces the coefficient of friction between fibers, improving drape and hand. It also enhances tear strength by allowing fibers to slide past each other during stress.
Processing Behavior
Finishing mills monitor the curing temperature and bath acidity during the padded application of the emulsion. If the pH of the bath rises above the recommended limits, amino siloxane can undergo premature condensation, leading to oil spots on the fabric surface. These spots are difficult to remove and ruin the batch.
Proper dosage avoids yellowing, which is a common issue with highly amine-functionalized silicones when exposed to hot air drying.