14-Shed Triple Weft-Layer. Ultra-Fine Mesh & Moderate Drainage
FILCON’s LTT Series, with its unique 14-shed triple weft-layer design, offers substantial benefits to paper makers. Please read below for details about the 4 major benefits of the LTT Series.
LTT series 14-shed triple weft-layer
1. Improved sheet formation and sheet smoothness
2. Enhanced retention
3. Extended wire life
4. Improved BD profile
14-Shed 3.5-layer Structure Provides Major Benefits
Moderate drainage, High fiber support and Anti-abrasion properties
Benefit 1—Improved Sheet Formation
| Moderate Drainage System | Creating Pulse Force | |
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| Good Fiber & Filler Dispersion |
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| Good Sheet Formation | Better Sheet Bulkiness | Less Two-sidedness |
Compare the Difference
Moderate Drainage Model
14-shed 3.5-layer Drainage Model
Defective Drainage Flow
Rapid Drainage Model
Triple-layer SSB Drainage Model
Straight Through Structure
Controlled Drainage
Negative Effects of Rapid Drainage
Optimizing Pulse by Blades
Mechanism – Flexible MD that Works
Benefit 2—Enhanced Retention and Sheet Smoothness
| Ultra-fine Mesh | High Weft Density on Sheet Side | |
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| Better Fiber & Filler Support |
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| Enhanced Retention | Good Sheet Smoothness |
LTT Series Improves Paper Quality
Duo-D Former Bottom unit: Coated Base Paper 64gsm
Before improving
Result using Filcon’s LTT-9FE fabric
LTT Series Improves Formation
(Photo: Newsprint 42.5gsm)
Outer/Inner SSB/SSB
Outer/Inner LTT-9FE/LTT-9FE
Improved Fiber Support Results in Fewer Wire Marks
Sheet Break – Reducing Contamination Inside the Top Unit
| Machine Type | Sym-MB |
| Speed | 950 m/min (3,117 ft/min) |
| Weight | 60.2－104.7g/m2(295－512Lb/1000ft2) |
| Grade | XEROX (PPC) |
| Fabric Width | 3,800 mm (150 inch) |
Less short-fiber accumulation inside the top unit
Improved Formation (Cost Reduction) by Controlled Initial Drainage
| Machine Type | HS Former (metso) |
| Speed | 1,750 m/min (5,740 ft/min) |
| Weight | 45－50g/m2 |
| Grade | Newsprint |
| Fabric Width | 10,000 mm (394 inch) |
Improved Formation (Improvement Ratio: 7-8 Point Up): vs SSB
Improved Smoothness (Improved Two-sidedness: 130/150 ð 140/140)
| Thermal Roll 150 → 120°C |  |
Cost Reduction |
| Calendar Nip 50 → 40kN |
Benefit 3—Extended Wire Life
| 14-Shed Long Knuckle Weft Yarn |
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| Greater Wear Resistance in Weft Yarn |
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| Extended Wire Life |
Fabric Structures
7-shed 2.5-layer LL-70E
14-shed 3.5-layer LTT-7FE
Benefit 4—Improved BD Profile
| High CMD Stiffness |
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| Improving BD Profile |
High CMD Stiffness
