I. Anchoring Fibers: Strengthening the Bond Between Auxiliaries and Fabric
Amino groups possess strong polarity, forming stable hydrogen bonds with the hydroxyl and carboxyl groups on the surface of natural fibers such as cotton, linen, and wool. They can also directionally adsorb onto the active sites of synthetic fibers, firmly "anchoring" auxiliary molecules to the fiber surface. This characteristic completely solves the problem of ordinary nonionic auxiliaries easily detaching after washing. For example, fabrics treated with amino-modified silicone oil retain more than 80% of their softness after ten regular washes, far exceeding the wash resistance of ordinary silicone oil auxiliaries, significantly extending the durability of fabric functionality.

II. Optimizing Hand Feel: Creating a Comprehensive Soft and Elastic Touch
Amino groups are the core functional groups that enable textile softeners to achieve excellent hand feel. The amino side chains in amino silicone oil can directionally align on the fiber surface, forming a uniform lubricating layer between fibers, significantly reducing the coefficient of friction between fibers, allowing the fabric to simultaneously achieve a soft, smooth, and fluffy triple hand feel. For different fabrics, the feel can be precisely controlled by adjusting the amino content: low-ammonia-equivalent amino auxiliaries are suitable for light-colored cotton fabrics, achieving low yellowing while creating a delicate and skin-friendly feel; products with slightly higher amino equivalents are suitable for heavier home textile fabrics, giving them a full and resilient texture.

III. Composite Enhancement: Expanding the Multiple Practical Properties of Fabrics
The high reactivity of amino groups can also serve as functional modification sites, resulting in multiple practical effects. Amino-containing antistatic auxiliaries can absorb trace amounts of moisture in the air, forming a continuous conductive film on the fiber surface, quickly dissipating static electricity and preventing the problems of dust adhering and tangling in synthetic fiber fabrics. Some quaternized ammonium-modified amino derivatives can also disrupt the cell membrane structure of common bacteria, giving underwear, home textiles, and other close-fitting fabrics stable antibacterial properties, adding more practical value to textiles beyond their basic feel.