What is Seamless Underwear Lamination Technology？
"The ability of seamless underwear to enter the market is inseparable from its adhesive technology. The one-piece production and processing technology enables the successful development of sewing-free technology, resulting in seamless and traceless underwear.
What are the main types of seamless laminating techniques currently available?
The first type is glue-free laminating technology: The scope of use of glue-free laminating is mainly limited to chemical fiber or blended fabrics. This fitting working distance uses high-frequency vibration waves within the action range. The surface molecules of the fabric itself generate intense heat with each other instantly, thereby achieving the effect of melt bonding. However, the limitation of this fitting method is that it must be used on chemical fiber fabrics, and natural plants do not have such characteristics. Therefore, this fitting technology is basically not used in the processing and production of seamless underwear.
The second type is Glue Bonding: Glue bonding can be said to be the main means of seamless bonding for a period of time. Glues mainly include solvents or water-based adhesives. Made from water or solvent as the medium, the resin is dispersed in the medium. After the water or solvent has evaporated, a layer is formed to reach the bonding strength. The curing process is a physical reaction. There are two types of curing adhesives: liquid solvent type and solid hot melt type. The solvent type is directly coated on the fabric, while the solid type needs to be heated and turned into a liquid.
The third type is hot melt adhesive film lamination: Hot melt adhesive film lamination is to make the hot melt adhesive into a film shape, which not only ensures the uniformity of the lamination but also has a soft feel. Fine operations can be performed without defects such as glue overflow. The hot melt adhesive film penetrates into the fabric under high temperature and pressure and forms a logistics interlock after cooling and crystallization. The structure reaches bonding strength. As women's intimate clothing, underwear is in direct contact with the skin. It is not only required to be comfortable to wear but also safe and hygienic.