How does the porosity of polypropylene affect adhesion of decorative films?
The porosity of polypropylene plays a critical role in determining the adhesion quality of decorative films. A highly porous surface increases the effective contact area, allowing adhesives to penetrate and form stronger mechanical bonds. However, excessive porosity can lead to uneven adhesion or weak spots due to inconsistent adhesive distribution. Surface roughness, influenced by porosity, also affects wettability and chemical bonding. Optimizing porosity levels ensures balanced adhesive penetration and film stability, enhancing durability and aesthetic performance. Understanding this relationship helps in selecting the right polypropylene grades and adhesive formulations for superior decorative film applications.
