The hot melt adhesives used in sanitary napkins, especially hot melt pressure-sensitive adhesives (HPS), have the following structural and functional characteristics:
Structural adhesives are the mainstream: In sanitary napkin production, structural adhesives account for up to 60% of the usage, making them the most common type of hot melt adhesive.
The adult incontinence product market has great potential: With the aging population, the adult incontinence product market is developing rapidly, and the demand for hot melt adhesives is expected to grow at an average annual rate of 9%, becoming a new growth engine.
Main Component: Synthetic resins are the primary component. Typically, thermoplastic elastomers (such as SIS, SBS) or polyolefin resins are used as the matrix, combined with tackifying resins, waxes, and antioxidants to improve adhesion, heat resistance, and stability.
Hot melt pressure-sensitive adhesives are the core type: Hot melt pressure-sensitive adhesives are commonly used for the backing of sanitary napkins, combining the melt-coating properties of hot melt adhesives with the "light pressure adhesion" characteristics of pressure-sensitive adhesives. Applying pressure activates the adhesion, and it sets after cooling.