Fabric Designs Selection Guide
The following table shows typical paper grades and matching forming fabric designs for each grade of papers. When selecting a fabric design for use, consider the type of machine, stock condition, paper grade and weight.
| Paper Grade | Single-layer | Double-layer | Triple-layer | WSB type Triple-layer |
| 1.5-layer | 2.5-layer | Triple Weft-layer | ||
| Newsprint | — | SS-400 | — | FUJI/SAKURA-60 Series FUJI/SAKURA-92 Series |
| — | LL-40E, 70E SS-40E, 70E |
LTT-7FE, 9FE | ||
| Fine paper | OS-H60, 76 | LL-700 SS-400, 700, 4F0, 7F0 |
— | FUJI/SAKURA-50 Series FUJI/SAKURA-60 Series FUJI/SAKURA-92 Series |
| — | LL-40E, 70E, 4FE, 7FE SS-40E, 70E, 4BE |
LTT-4FE, 7FE, 9FE | ||
| Brown & Kraft | OS-H50, 60, 70, 80 OLV-H50 |
SS-200, 400 | — | FUJI/SAKURA-30 Series FUJI/SAKURA-50 Series FUJI/SAKURA-60 Series |
| OFE-H40,50 | LL-40E, 70E, 4FE SS-20E, 40E, 2BE, 4BE |
LTT-4FE, 7FE | ||
| Tissue paper | OF-H65 OS-H76 |
— | — | TT-800H FUJI/SAKURA-80 Series |
| — | SS-70E SS-80G |
— | ||
| DNT Washer | — | — | — | FUJI/SAKURA-30 Series |
| — | — | LTT-4FE, 7FE, 9FE | ||
| Shrink Sleeves (Cover Wires) |
SOP-8K, 10K | — | — | — |
Edge Sealing
To prevent fraying and unraveling, a soft resin is impregnated into the edges of the fabric.
Anti-Contamination Treatment
Filcon Fabrics are treated with specialized resins which help to prevent contamination, increase durability and stability, and improve sheet release.
Forming Fabric Materials
Polyester monofilament is the most widely used material for forming fabrics. It has the following advantages over other polymer materials:
1 Less elongation with respect to loads,
2 Strong and durable,
3 Minimal hygroscopicity (highly stable in wet environments)
4 Greater fatigue resistance, and
5 Highly corrosion-resistant (especially with respect to acids).
The table shows properties and specifications of fabric materials. Polypropylene and polyvinylidene fluoride have superior acid and alkali resistance, and thus are commonly used raw material for forming fabrics. Although polyamide has less stability (due to its hygroscopicity), it can be used for its excellent resistance to abrasion and fibrilization.
| Polyester | Polyamide | Polypropylene | |
| Tensile Strength | 35－70 N/mm2 | 28－46 N/mm2 | 28－51 N/mm2 |
| Elongation | 16－40% | 20－70% | 20－25% |
| Specific Gravity | 1.38 | 1.14 | 0.9 |
| Moisture Absorption 24hr | 0.2% | 2.9% | 0.03% |
| Temperature Limit in Use | 140°C*1 284°F |
90－130°C 194－266°F |
100－120°C 212－248°F |
| Effects of Acids | Resistant to almost all inorganic acids | Decomposes when boiled with 5% hydrochloric acids; also affected by other acids | Highly resistant |
| Effects of Alkalis | Resistant to weak alkalis Gradual reaction to strong alkalis | Almost unchanged | Highly resistant |
| *1 80－100°C in case of wet heat | |||
