Core Wrap At a Glance
Primarily, the core wrap is responsible for keeping the fluff and superabsorbent polymer (SAP) matrix contained at the center of the core. But also noteworthy is the fact that the adhesives used to seal the core wrap and bond adjacent materials are essential to preventing core shifting. Keeping the core in place creates a more comfortable fit for the wearer and helps ensure optimal performance during use.
There are two types of core wraps manufacturers typically use today:
- Nonwoven wraps, which achieve faster absorption but do not reduce the risk of core crack leakage.
- Tissue wraps, which have slower absorption but are known for helping active users stay drier with less rewet and are more resilient to core cracking.
In some cases, disposable hygiene producers are exploring opportunities to eliminate the core wrap entirely to create thinner products. This makes selecting the right construction adhesives critical for core integrity, as the responsibility for stabilizing the fluff and SAP matrix rests on the adhesives.