Intermittent Bonded Ribbon Production Line Guide
At set intervals, an intermittent bonded ribbon production line joins fiber subunits. This keeps fibers in an organized arrangement for mass-fusion splicing while letting the ribbon roll or fold into a compact cable shape. The design enables flexible ribbon cable production without compromising efficient fiber handling.
Some processes deposit bonding material before the subunit coating cures. Diffusion can occur across the shared interface before the materials cure together. One commercial example is Prysmian’s FlexRibbon technology, whose original design the company says dates to 2018. Together, these methods demonstrate the relationship between optical fiber ribbon manufacturing and fiber optic bonding.
Fiber Coloring Machine Compact Fiber Unit Fiber Ribbone Line
What Is An Intermittent Bonded Fiber Ribbon?
An intermittent bonded fiber ribbon groups optical fibers into small subunits. The subunits stay organized for splicing while remaining able to change shape to sit inside a cable.
The Arrangement Of Fiber Subunits And Intermittent Bonds
Each adjacent pair or group of fibers is held together by a coating. Instead of joining along their entire length, these optical fiber subunits are linked to neighboring subunits at spaced bond points. Six two-fiber subunits may form a 12-fiber design. Configurations can contain 4 to 36 fibers, with bonds spaced from 10 to 1,000 millimeters apart.
Intermittent Bonded Ribbon Production Line
Differences Between Rollable Ribbons And Conventional Flat Ribbons
In a conventional flat ribbon, the fibers remain in a single fixed plane. Between bonds, a rollable fiber ribbon can curl without losing the fiber alignment needed for mass-fusion splicing. Prysmian’s FlexRibbon uses compact bonding points to permit bending and folding.
Why Flexible Ribbons Support Compact, High-Density Cables
Inside a high-density fiber cable, a flexible ribbon can take up less space. Cable designers can therefore fit more fibers in a compact structure without sacrificing an organized fiber layout.
Process And Equipment For An Intermittent Bonded Ribbon Production Line
The intermittent bonded ribbon production process aligns optical fibers side by side along the ribbon’s length. Subunits are created when a first material coats groups containing two or more fibers. A second material links neighboring subunits at spaced points and leaves flexible sections between the bonds.
Organize Adjacent Optical Fibers Into Subunits
The planned ribbon layout determines how fibers are arranged next to one another. Each selected group becomes a subunit when the first coating material encases and holds its fibers together.
Apply Subunit Coating And Intermittent Bonding Material
Fiber ribbon coating creates the subunits. A discrete coating applicator places bonding material between neighboring subunits at intervals rather than along their entire length.
Use Wet-On-Wet Application To Form Diffusion Zones
Wet-on-wet bonding involves depositing the bonding material before the subunit coating has cured. A diffusion zone develops as the materials diffuse through their shared interface.
Cure The Subunit Coating And Bonds Together
A single curing step sets both the subunit coating and the intermittent bonds. Optical fiber ribbon equipment supports these operations, although a complete equipment list, line speed, and production capacity are not specified.
| Production Stage | Material Or Operation | Purpose |
|---|---|---|
| Fiber arrangement | Arrange fibers next to one another | Set the ribbon layout |
| Subunit formation | Apply the first coating material around fiber groups | Hold two or more fibers as subunits |
| Bonding at intervals | Apply the second material between adjacent subunits | Join subunits at spaced points |
| Wet-on-wet bonding interface | Deposit bonds while the subunit coating remains uncured | Allow materials to form a diffusion zone |
| Combined cure | Cure coating and bonds in one step | Set the assembled ribbon structure |
Key Production Line Stages And Process Controls
The fiber ribbon production stages proceed in a defined order. The sequence involves arranging fibers into subunits, applying a subunit coating, placing intermittent bonds between adjacent subunits, and curing the coating and bonds together. The ribbon design must guide both optical fiber coating application and placement of the bonds.
Example designs specify gaps of 5 to 100 micrometers between subunits. Example intermittent bond spacing ranges from 10 to 1,000 millimeters. Some bond deposits take a diamond-like shape, narrowing at the ends and widening in the center. The disclosed examples should not be treated as fixed settings that apply to every line.
The selected materials, bond layout, and curing method determine ribbon manufacturing process control. The source material does not specify line speeds, curing temperatures, or inspection intervals, so these values must not be inferred.
Ribbon Flexibility, Bond Design, And Materials
Material selection and bond layout determine how the ribbon behaves during cable making and splicing. Each fiber is covered by coatings that still allow the subunits to flex as designed.
Choose Compatible Coating And Bonding Materials
Because subunit coatings and ribbon bonding materials serve separate roles, they do not have to share the same formula. Resins that mix or remain at least partly soluble can produce a gradual interface. Lower coating viscosity may also promote intermixing.
This interface forms a diffusion zone in which properties change gradually. Differences in color, stiffness, surface friction, tear strength, or stretch may occur within this zone. Disclosed thicknesses range from 2 to 50 micrometers, with 5 to 15 micrometers representing a narrower range.
Control Bond Placement, Spacing, And Geometry
Where subunits remain linked or move freely is governed by bond spacing. An intermittent bond layout creates unbonded spans separating the bond points. Intersecting convex and concave curves create the saddle shape used on some bond surfaces.
Maintain Fiber Organization While Balancing Ribbon Flexibility
Unbonded spans allow the ribbon to change from a flat layout into a rolled, curled, or folded shape. A flexible fiber ribbon design bends during cable installation while keeping fibers organized for splicing.
Quality Checks To Maintain Consistent Ribbon Production
Instead of using assumed pass limits, dependable fiber ribbon quality checks focus on defined features. The patent identifies design factors such as bond spacing, subunit gaps, diffusion-zone thickness, and bond shape. However, it does not specify inspection methods or acceptance limits.
Check Bond Continuity And Subunit Alignment
Check that intermittent bonds join adjacent subunits at planned locations and leave unbonded lengths between connections. Review subunit alignment and gaps because shifts can affect ribbon shape and bond geometry.
Evaluate Ribbon Flexibility And Rollability
To evaluate ribbon rollability, watch whether it bends and gathers while keeping fibers in their original order. Compare bond spacing and flexibility across the overall ribbon design. Treat these comparisons as design checks rather than universal production tolerances.
Confirm Fiber Identification And Ribbon Configuration
Confirm each fiber’s position using fiber color coding. A common 12-color sequence is blue, orange, green, brown, slate, white, red, black, yellow, violet, rose, and aqua. For ribbons containing more than 12 fibers, this sequence may be repeated.
Cable Applications, Integration, And Splicing Benefits
Intermittently bonded ribbons can roll inside a cable, enabling more fibers to fit into a compact design. According to Prysmian, FlexRibbon enables high-density ribbon cable designs with smaller diameters and better fiber duct utilization.
Enable High-Density Cable Designs And Better Duct Utilization
Prysmian offers FusionLink and MassLink with FlexRibbon in indoor, outdoor, and indoor/outdoor designs. FusionLink features dry water blocking and is available with 250 μm or 200 μm ribbon. EcoSpan aerial cable supports spans of up to 300 feet under NESC Heavy loading conditions. FlexDrop is a small-diameter outdoor option that accommodates up to two 12-fiber ribbons.
Support Mass-Fusion Splicing And Quicker Deployment
Multiple ribbon fibers, often 12 at a time, are joined in one operation through mass-fusion splicing. On compatible ribbon routes, this method can shorten splice time. When connecting to loose-tube cable, technicians split ribbon fibers and individually splice them with a single-fiber splicer.
Review Indoor, Outdoor, Access, And Broadband Applications
Ribbon cable is used in point-to-point networks, indoor FTTH systems, MTP wiring-box links, and urban trunk routes. Selecting indoor and outdoor fiber cable for each route helps align cable construction with the needs of buildings, aerial runs, and underground installations.
Conclusion
Fiber layout, bond placement, curing, and inspection are combined in an intermittent bonded ribbon line guide. The result is a flexible optical fiber ribbon that remains orderly during handling yet can roll or fold into compact cable designs.
In this process, bonds are placed before the subunit coating cures. Before they cure together, the materials form a diffusion zone. Reliable fiber cable manufacturing is encouraged by careful control at every stage.
Mass-fusion ribbon splicing is also supported by flexible ribbons, helping crews splice many fibers in one operation. FlexRibbon is described by Prysmian as suitable for multiple cable designs, including compact configurations with up to 6,912 fibers.
Manufacturers and network planners need to balance fiber alignment, bond strength, and rollability. This balance may make cable packaging easier while ensuring ribbons remain prepared for efficient installation and splicing.