Intermittent Bonded Ribbon Production Line Guide
An intermittent bonded ribbon production line joins fiber subunits at set intervals. Fibers remain organized for mass-fusion splicing, while the ribbon can roll into a compact cable shape. Flexible ribbon cable production is supported by this design while maintaining efficient fiber handling.
In some processes, bonding material is applied while the subunit coating is still uncured. 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. These methods illustrate how optical fiber ribbon manufacturing and fiber optic bonding operate together.
Intermittent Bonded Ribbon Compact Fiber Unit Fiber Coloring Machine
Understanding What An Intermittent Bonded Fiber Ribbon Is
An intermittent bonded fiber ribbon organizes optical fibers into small subunits. Although they remain organized for splicing, the subunits can change their shape to fit within a cable.
How Fiber Subunits And Intermittent Bonds Are Arranged
Each adjacent pair or group of fibers is held together by a coating. These optical fiber subunits connect to neighboring subunits at spaced bond points rather than along their full length. A 12-fiber design may use six two-fiber subunits. The configurations range from 4 to 36 fibers, and bond spacing ranges from 10 to 1,000 millimeters.
Intermittent Bonded Ribbon Production Line
Differences Between Rollable Ribbons And Conventional Flat Ribbons
In a conventional flat ribbon, the fibers remain in one fixed plane. A rollable fiber ribbon can fold between bonds while retaining fiber alignment for mass-fusion splicing. Bending and folding are supported by the discrete bonding points used in Prysmian’s FlexRibbon.
Why Flexible Ribbons Support Compact, High-Density Cables
Ribbon flexibility reduces the space it occupies inside a high-density fiber cable. This enables cable designers to fit more fibers into a compact structure while preserving an organized fiber layout.
Process And Equipment For An Intermittent Bonded Ribbon Production Line
Throughout an intermittent bonded ribbon production process, optical fibers are laid side by side along the ribbon’s length. Subunits are formed when a first material coats groups containing two or more fibers. Neighboring subunits are joined at spaced points with a second material, leaving flexible sections between bonds.
Organize Adjacent Optical Fibers Into Subunits
Fibers are placed beside one another according to the planned ribbon layout. The first coating material encloses each selected group and holds its fibers together as a subunit.
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
During wet-on-wet bonding, the subunit coating remains unset when bonding material is applied. A diffusion zone develops as the materials intermix through their shared interface.
Cure The Subunit Coating And Bonds Together
A single curing step sets both the subunit coating and the intermittent bonds. Although optical fiber ribbon equipment is used for these operations, the complete equipment list, line speed, and production capacity are not provided.
| Process Stage | Material Or Action | Intended Purpose |
|---|---|---|
| Fiber arrangement | Place fibers side by side | Establish 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 | Connect subunits at separated bond points |
| Wet-on-wet interface | Deposit bonds while the subunit coating remains uncured | Enable formation of a diffusion zone between the materials |
| Joint curing step | Set the coating and bonds together in one step | Cure the assembled ribbon structure |
Main Production Line Stages And Process Controls
Fiber ribbon production stages take place in a specific sequence. The sequence involves organizing 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 positioning of the bonds.
Example designs specify gaps of 5 to 100 micrometers between subunits. A range of 10 to 1,000 millimeters is described for intermittent bond spacing in example designs. 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 govern how the ribbon behaves during cable making and splicing. Coatings protect each fiber while permitting the subunits to flex as intended.
Select Compatible Coating And Bonding Materials
Because subunit coatings and ribbon bonding materials serve separate roles, they do not have to share the same formula. A gradual interface can be created by resins that intermix or remain at least partly soluble. Lower coating viscosity may also promote intermixing.
A diffusion zone forms at this interface, with properties that vary gradually. The zone may differ in color, stiffness, surface friction, tear strength, or stretch. Disclosed thicknesses extend from 2 to 50 micrometers, with 5 to 15 micrometers representing a narrower range.
Manage Bond Placement, Spacing, And Geometry
Bond spacing determines where fiber subunits stay connected and where they can move freely. Intermittent bond geometry leaves unbonded spans between bond points. Intersecting convex and concave curves create the saddle shape used on some bond surfaces.
Balance Ribbon Flexibility With Fiber Organization
Between bonds, unbonded spans let a flat ribbon transform into a rolled, curled, or folded form. A flexible fiber ribbon design flexes during cable installation while keeping fibers organized for splicing.
Quality Checks For Consistent Ribbon Production
Instead of using assumed pass limits, dependable fiber ribbon quality checks assess defined features. The patent identifies design factors such as bond spacing, subunit gaps, diffusion-zone thickness, and bond shape. However, it does not establish inspection methods or acceptance limits.
Check Bond Continuity And Subunit Alignment
Check that intermittent bonds connect adjacent subunits at planned locations and leave unbonded lengths between connections. Subunit alignment and gaps require review because shifts may change ribbon shape and bond geometry.
Evaluate Ribbon Flexibility And Rollability
Assess ribbon rollability by observing how the ribbon bends and gathers without changing fiber order. Compare bond spacing and flexibility across the overall ribbon design. These comparisons are design checks, not 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 repeat.
Cable Applications, Integration, And Splicing Benefits
By folding within a cable, intermittently bonded ribbons allow more fibers in a compact design. Prysmian says FlexRibbon supports high-density ribbon cable designs, smaller diameters, and improved fiber duct utilization.
Support High-Density Cable Designs And Duct Utilization
For indoor, outdoor, and indoor/outdoor applications, Prysmian provides FusionLink and MassLink with FlexRibbon. Dry water blocking is used in FusionLink, which comes with either 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
Mass-fusion splicing connects several ribbon fibers in a single operation, often 12 at once. On compatible ribbon routes, this method can reduce 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
Applications for ribbon cable include point-to-point networks, indoor FTTH systems, MTP wiring-box links, and urban trunk routes. Choosing indoor and outdoor fiber cable to suit the route aligns its construction with building, aerial, and underground requirements.
Conclusion
An intermittent bonded ribbon line guide covers fiber layout, bond placement, curing, and inspection. 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 applied before the subunit coating cures. Before they cure together, the materials form a diffusion zone. Careful control throughout the process supports reliable fiber cable manufacturing.
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.
For manufacturers and network planners, the priority is to coordinate fiber alignment, bond strength, and rollability. Achieving that balance can simplify cable packaging while keeping ribbons ready for efficient installation and splicing.