The ACF iodine value is one of the most important indicators for measuring the adsorption ability of activated carbon fiber. For ACF used in water filtration, this value directly affects how well it removes chlorine, odors, and organic pollutants.
What Is the Iodine Value in ACF?
The iodine value shows how much iodine an ACF material can adsorb.
It is expressed in mg/g.
A higher iodine value means stronger adsorption power.
Most commercial ACF ranges from 800 to 1100 mg/g.
High-performance ACF, like the grade produced by Damai, can reach up to 1300 mg/g.
Relationship Between Iodine Value and Surface Area
The iodine value is closely linked to the specific surface area of ACF.
A larger surface area provides more active sites for adsorption.
- When the iodine value is high, the surface area is usually large.
- More micro-pores are formed during activation.
- These micro-pores capture small molecules more efficiently.
- The adsorption speed increases, especially under fast water flow.
For ACF, a higher iodine value often indicates more uniform and well-developed micro-pore structures. This is why iodine value is commonly used as a quick performance indicator.
Why Iodine Value Matters for Water Filtration
Micro-pores are the key working zones for ACF.
Most harmful compounds, such as residual chlorine and organic chemicals, are small molecules.
These molecules can be trapped effectively by high-iodine-value ACF.
When the iodine value is higher:
- Adsorption becomes faster.
- Filtration efficiency improves.
- Contact time required is shorter.
- Filter performance becomes more stable.
This is why many high-end shower filters, faucet filters, and compact cartridges choose high iodine value ACF.
Typical Iodine Value Levels in ACF
| Iodine Value (mg/g) | Quality Level | Application |
| 700–800 | Basic | Entry-level filters |
| 900 | Standard | Household filter cartridges |
| 1000–1100 | High grade | Shower filters, drinking water filters |
| 1300 (Damai) | Premium | High-performance cartridges, OEM advanced systems |
Performance Advantages of High-Iodine ACF
Using high-grade ACF brings clear benefits:
- Stronger chlorine removal
- Better taste and odor reduction
- Improved adsorption of small organic pollutants
- Stable performance under fast flow
- Longer filter life
This makes ACF ideal for modern water purification systems where efficiency and speed matter.
Why ACF Performs Better Than Traditional Activated Carbon
Compared with granular activated carbon and carbon blocks, ACF has:
- A larger surface area
- More micro-pores
- Faster adsorption rate
- Better flow resistance
- Less dust release
This is why ACF is widely used in compact designs where high performance is required within limited space.
Damai ACF: High Iodine Value Up to 1300
Damai produces advanced-grade activated carbon fiber designed for water filter cartridges.
Our ACF can reach an iodine value as high as 1300 mg/g.
With optimized activation technology, the ACF provides:
- High surface area
- Uniform pore structure
- Fast adsorption
- Reliable and stable performance
This level of quality allows Damai to support OEM and customized ACF filter cartridges for global brands.
Conclusion
The iodine value is one of the key factors for evaluating the performance of ACF.
It is closely related to its surface area and micro-pore structure.
High iodine value ACF delivers better removal of chlorine, odors, and organic pollutants.
Damai’s high-grade ACF, with iodine values reaching 1300 mg/g, ensures strong and reliable performance for a wide range of water filtration products.
FAQ
1. What does the iodine value indicate in ACF?
It shows the adsorption capacity of activated carbon fiber. A higher iodine value means better ability to remove chlorine, organic compounds, and odors from water.
2. Is a higher iodine value always better for water filters?
Yes. For water purification, higher iodine value ACF typically offers more micro-pores, faster adsorption speed, and stronger filtration performance.
3. What is the typical iodine value for ACF used in filters?
Common grades range from 800 to 1100 mg/g. Premium ACF, like Damai’s high-performance grade, can reach up to 1300 mg/g.
4. How is iodine value related to surface area?
The iodine value increases when the surface area becomes larger. A higher surface area means more active sites for adsorption.
5. In what types of filters is high-iodine-value ACF used?
It is widely used in shower filters, faucet filters, bottle filters, under-sink systems, and OEM customized cartridges.
