How does the bonding method affect the properties of PP spunbond non-woven fabric?
Bonding as the core process step Bonding defines structure. It connects tangled fibers into a unified sheet. Without bonding, the web falls apart easily. The primary method in spunbond lines is thermal bonding, but alternatives exist. Each method creates a different network of bonds across the web, impacting key properties. Thermal bonding fundamentals In thermal bonding, the web travels between heated rollers. Hot contact points soften fibers so they fuse. When cooled, those melted points stand firm. The pattern and intensity of these bonds influence strength and feel. Bond pattern choices include: Point bonds with small dots Area bonds with continuous or large shapes Custom patterns for directional strength Smaller bond points tend to yield softer sheets, while large areas increase rigidity. Thermal bonding remains the most widely used method for spunbond fabrics intended for everyday use due to its balance of strength and flexibility. Advantages Strong fiber fusion High output ...