To improve the Double layer design, companies may also consider the 2.5 Layer Forming Fabric. This fabric type is an improved version of the double layer design where the weft density of the sheet side is increased. As the weft increases, the paper’s surface properties improve as well as retention and wire mark. There are different shed layer however the 8-shed and the 16-shed has the greatest potentials.
Example of Application:
- Newsprint
- Offset printing paper
- Cigarette paper
- Toilet paper
- Copperplate paper
The 2.5 layer also has higher fabric support and longer life span due to the increase in the water yarn diameter and the long CD crimp. This fabric would best work for medium up to high-speed paper machine.
| Model of Fabrics | Wire Diameter (mm) | Density (wire/cm) | Strength (N/cm) | Air Permeability (CFM) | |||
| Warp | Weft | Warp | Weft | Breaking | Joint | ||
| 603516 | 0.17 | 0.13, 0.20/0.35 | 68 | 54 | ≥960 | ≥700 | 316 |
| 325516 | 0.30 | 0.27, 0.30/0.55 | 38 | 27 | ≥1500 | ≥1000 | 443 |
| 385016 | 0.27 | 0.20, 0.25/0.50 | 40 | 33 | ≥1500 | ≥1000 | 443 |
| 434516 | 0.22 | 0.25, 0.17/0.45 | 47 | 41 | ≥1200 | ≥850 | 380 |
| 602516 | 0.17 | 0.13, 0.18/0.25 | 68 | 61 | ≥960 | ≥650 | 344 |
| 602716 | 0.17 | 0.17, 0.13/0.27 | 66 | 54 | ≥960 | ≥650 | 304 |
