What Is Total Absorbent Capacity?
Direct Answer
Total absorbent capacity is the maximum liquid a product can hold at saturation, a key spec for overnight diapers and heavy-flow pads.
Key Takeaways
- Total absorbent capacity is the maximum liquid a product can hold at saturation, a key spec for overnight diapers and heavy-flow pads.
- How it works: Capacity is determined by core size and SAP content.
- Overnight diapers specify higher total capacity than daytime versions
- Myth: Theoretical capacity is what users get. Real usable capacity is lower under pressure and movement
How Total Absorbent Capacity Works
Capacity is determined by core size and SAP content. Tests saturate the core and weigh retained liquid. Higher capacity suits overnight and heavy flow; everyday products trade capacity for thinness and cost. Real-world usable capacity is lower than theoretical due to pressure and distribution limits.
Examples and Applications
- Overnight diapers specify higher total capacity than daytime versions
- Heavy-flow night pads are engineered with larger cores
Total Absorbent Capacity vs. Related Terms
| Term | What it is | Key difference |
|---|---|---|
| AAP | Total Absorbent Capacity | Total capacity is saturation; AAP measures retention under pressure — closer to real use |
Limitations and Common Misconceptions
- Myth: Theoretical capacity is what users get. Real usable capacity is lower under pressure and movement
- Myth: Capacity predicts all performance. Distribution and rewet matter too
What does total absorbent capacity mean?
The maximum liquid a product holds at saturation — a headline spec for overnight products.
Why is usable capacity lower?
Pressure, movement and distribution limits mean real performance is below theoretical saturation.
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)