The performance of elastic adhesives is specifically engineered to withstand the high-tension environments inherent in elastic components. Its core function lies in ensuring a strong bond while simultaneously exhibiting exceptional elasticity and stability, thereby guaranteeing that the sanitary napkin remains securely in place during dynamic use.
Superior Creep Resistance
During production, elastic bands are held under tension; consequently, the adhesive used for them must be capable of withstanding the bands' inherent retraction force over extended periods to prevent loosening or displacement. This constitutes the most critical performance metric for elastic adhesives, directly determining whether the final product will undergo deformation or suffer from functional failure.
Excellent Thermal Stability
The typical operating temperature for elastic adhesives ranges from 160°C to 180°C. During the high-temperature coating process, the adhesive must maintain stable viscosity-without carbonizing or decomposing-while simultaneously curing and setting rapidly upon cooling.
Soft and Elastic
The adhesive itself must possess excellent extensibility, closely matching the elastic modulus of the elastic band to prevent any sensation of stiffness or "hard spots," thereby enhancing wearing comfort-making it particularly suitable for individuals with sensitive skin.
High Peel Strength and Adhesion
The adhesive must maintain stable bonding even under dynamic stress, ensuring that the elastic band does not delaminate or curl at the edges when bonded to substrates such as non-woven fabrics or backing films; furthermore, it must retain its performance capabilities, particularly in high-temperature and high-humidity environments.