Intermittent Bonded Ribbon Production Line Guide
An intermittent bonded ribbon production line joins fiber subunits at set intervals. This keeps fibers in an organized arrangement for mass-fusion splicing while letting the ribbon roll or fold into a compact cable shape. Flexible ribbon cable production is supported by this design while maintaining 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. Prysmian’s FlexRibbon technology provides one commercial example, and the company dates its original design to 2018. These methods illustrate how optical fiber ribbon manufacturing and fiber optic bonding operate together.
Intermittent Bonded Ribbon Production Line Fiber Draw Tower Compact Fiber Unit
What Is An Intermittent Bonded Fiber Ribbon?
An intermittent bonded fiber ribbon groups optical fibers into small subunits. Although they remain organized for splicing, the subunits can adjust their shape to fit within a cable.
How Fiber Subunits And Intermittent Bonds Are Arranged
A coating secures each adjacent fiber pair or group together. Instead of joining along their entire length, these optical fiber subunits are linked to neighboring subunits at spaced bond points. A 12-fiber design may use six two-fiber subunits. 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 one fixed plane. Between bonds, a rollable fiber ribbon can fold without losing the fiber alignment needed for mass-fusion splicing. Bending and folding are supported by the small 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 maintaining an organized fiber layout.
Process And Equipment For An Intermittent Bonded Ribbon Production Line
The intermittent bonded ribbon production process places optical fibers side by side along the ribbon’s length. A first material coats groups of two or more fibers to create subunits. Neighboring subunits are joined at separate points with a second material, leaving flexible sections between bonds.
Arrange 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 surrounds and holds its fibers together.
Apply Subunit Coating And Intermittent Bonding Material
The subunits are formed by fiber ribbon coating. Bonding material is deposited by a discrete coating applicator between neighboring subunits at spaced intervals, not continuously along their full length.
Use Wet-On-Wet Application To Form Diffusion Zones
Wet-on-wet bonding involves applying 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
Both the subunit coating and the intermittent bonds are cured in one curing step. Although optical fiber ribbon equipment is used for these operations, the complete equipment list, line speed, and production capacity remain unspecified.
| Process Stage | Material Or Operation | Purpose |
|---|---|---|
| Optical fiber arrangement | Place fibers side by side | Set the ribbon layout |
| Formation of subunits | Coat fiber groups with the first coating material | Hold two or more fibers as subunits |
| Bonding at intervals | Deposit the second material between neighboring subunits | Join subunits at spaced points |
| Wet-on-wet interface | Deposit bonds while the subunit coating remains uncured | Enable formation of a diffusion zone between the materials |
| Combined cure | Cure coating and bonds in one step | Set the assembled ribbon structure |
Key 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. Optical fiber coating application and bond placement must correspond to the ribbon design.
Example designs specify gaps of 5 to 100 micrometers between subunits. Example intermittent bond spacing extends from 10 to 1,000 millimeters. Bond deposits may have a diamond-like outline with narrow ends and a wider center. These are disclosed examples, not fixed settings for every production line.
The selected materials, bond layout, and curing method determine ribbon manufacturing process control. Because the source material provides no line speeds, curing temperatures, or inspection intervals, do not presume any values for them.
Materials, Bond Design, And Ribbon Flexibility
Ribbon behavior during cable making and splicing depends on the chosen materials and bond layout. Coatings shield 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.
This interface forms a diffusion zone in which properties change gradually. Differences in colour, stiffness, surface friction, tear strength, or stretch may occur within this zone. 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 controls where fiber subunits stay connected and where they can move freely. Intermittent bond geometry provides 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
Reliable fiber ribbon quality checks measure defined features rather than relying on assumed pass limits. 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.
Inspect 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 checking because shifts may change ribbon shape and bond geometry.
Assess Ribbon Flexibility And Rollability
To evaluate ribbon rollability, observe whether it bends and gathers while keeping fibers in their original order. Throughout the ribbon design, compare bond spacing and flexibility. Treat these comparisons as design checks rather than general production tolerances.
Confirm Fiber Identification And Ribbon Configuration
Confirm each fiber’s position through fiber color coding. A common 12-color sequence is blue, orange, green, brown, slate, white, red, black, yellow, violet, rose, and aqua. The color sequence may start again when a ribbon has more than 12 fibers.
Cable Applications, Integration, And Splicing Benefits
By rolling within a cable, intermittently bonded ribbons allow more fibers in a compact design. According to Prysmian, FlexRibbon enables high-density ribbon cable designs with smaller diameters and better fiber duct utilization.
Support High-Density Cable Designs And Duct Utilization
Prysmian offers FusionLink and MassLink with FlexRibbon in indoor, outdoor, and indoor/outdoor designs. FusionLink uses dry water blocking and is available with 250 μm or 200 μm ribbon. Under NESC Heavy loading conditions, EcoSpan aerial cable can support spans of up to 300 feet. FlexDrop is a small-diameter outdoor option that accommodates up to two 12-fiber ribbons.
Enable Mass-Fusion Splicing And Faster 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. For loose-tube cable connections, technicians separate the ribbon fibers and splice them one by one using 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 process produces a flexible optical fiber ribbon that stays organized for handling while rolling or folding into compact cable designs.
The process involves applying bonds while the subunit coating is still uncured. Before they cure together, the materials form a diffusion zone. Careful control throughout the process supports reliable fiber cable manufacturing.
Flexible ribbons also facilitate mass-fusion ribbon splicing, allowing crews to join multiple fibers at once. Prysmian describes FlexRibbon in various cable designs, including compact configurations containing up to 6,912 fibers.
Manufacturers and network planners need to manage fiber alignment, bond strength, and rollability. Achieving that balance can simplify cable packaging while keeping ribbons ready for efficient installation and splicing.