What Is Total Absorptive Capacity?
Direct Answer
Total absorptive capacity is the maximum liquid a diaper or pad core can hold before saturation, expressed as a volume or weight multiple.
Key Takeaways
- Total absorptive capacity is the maximum liquid a diaper or pad core can hold before saturation, expressed as a volume or weight multiple.
- How it works: Capacity is measured by saturating the core and weighing retained liquid (often vs fluff/SAP composition).
- Overnight diapers have higher core capacity than daytime versions
- Myth: Capacity is all that matters. Distribution, rate and rewet decide real performance — a high-capacity core can still leak
How Total Absorptive Capacity Works
Capacity is measured by saturating the core and weighing retained liquid (often vs fluff/SAP composition). It sets the product's theoretical limit, but real-world usable capacity is lower due to pressure, rewet and distribution. Overnight and heavy-flow products are engineered with higher capacity via more SAP.
Examples and Applications
- Overnight diapers have higher core capacity than daytime versions
- Capacity tests report grams of liquid retained per product
Total Absorptive Capacity vs. Related Terms
| Term | What it is | Key difference |
|---|---|---|
| AAP | Total Absorptive Capacity | Capacity is total liquid held; AAP is retention under pressure, closer to real-world use |
Limitations and Common Misconceptions
- Myth: Capacity is all that matters. Distribution, rate and rewet decide real performance — a high-capacity core can still leak
- Myth: Capacity equals absorbency under pressure. AAP (under load) is closer to real use
What is total absorptive capacity?
The maximum liquid a core holds at saturation — the theoretical limit before leakage.
Is higher capacity always better?
Not alone — distribution, absorption speed and pressure retention decide real performance.
References
- BASF - Superabsorbents (HySorb / SAVIVA), how SAP works — BASF (accessed 2026-08-02)
- Pampers Official - What's in a Pampers diaper (component materials) — 品牌官方 (accessed 2026-08-02)