The press felt is composed of base layer and batt fiber layer. The base layer is equivalent to the bone frame of the press felt, it decide the limit of felt weight, air permeablity , moisture content and stability. The base layer is woven into mesh structure using nylon material compose of monofilament, carding fiber, multifilament, etc. Accordint to different base layer, the press felt can be devidied into single layer felt, double layer felt, triple layer felt and laminated layer felt.
The double layer felt have two structure, one is 1+1 composite structure and double layer of MD yarn structure. The base layer of 1+1 composite structure is laminated by two different thickness fiber bottom layer. We can change the fiber thickness of top and bottom layer according to different paper machine and paper kind.
Double Layer Felt Structure
1+1 Composite Layer
Double Layer of MD Yarn
1. The double layer felt have good resistence of high pressure line, good elasticity and good water dewatering function.
2. The size of double layer felt is stable and have small elongation.
3. The strength is large , can effeciently decrease the rolls marks.
4. Double layer felts are suitable for high grade culture paper, newsprint paper, package paper and high grade board card paper.
| Suitable Paper Machine | Multi cylinder mould machine, fourdrinier paper machine as pick up felt and press felt |
| Machine Speed | ≤ 1000 m/min |
| Paper Kind | ≥ 8gsm all kinds of paper |
| Line Pressure | ≤ 60-200 kN/m |
| Felt Weight | 950-1450 gsm |
| Weight Deviation | ≤ ± 4% |
| Air Permeablity | 30-110 CFM |
| Elongation | ≤0.6% |
| Width Deviation | ≤ ± 2 cm |
| Broken Strength | ≥ 3000 N/5cm |
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