Intermittent Bonded Ribbon Production Line Guide
An intermittent bonded ribbon production line connects 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.
Some processes deposit bonding material before the subunit coating cures. Diffusion can occur through 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 connection between optical fiber ribbon manufacturing and fiber optic bonding.
Fiber Secondary Coating Line Intermittent Bonded Ribbon SZ Stranding Line
Understanding What An Intermittent Bonded Fiber Ribbon Is
An intermittent bonded fiber ribbon organizes 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
A coating holds 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. Six two-fiber subunits may form a 12-fiber design. The configurations range from 4 to 36 fibers, and bond spacing ranges from 10 to 1,000 millimeters.
Intermittent Bonded Ribbon Production Line
How Rollable Ribbons Differ From Conventional Flat Ribbons
In a conventional flat ribbon, the fibers remain in a single fixed plane. A rollable fiber ribbon can curl between bonds while retaining fiber alignment for mass-fusion splicing. Bending and folding are supported by the small bonding points used in Prysmian’s FlexRibbon.
How Flexible Ribbons Enable Compact, High-Density Cables
Inside a high-density fiber cable, a flexible ribbon can occupy less space. This enables cable designers to fit more fibers into a compact structure while preserving an organized fiber layout.
Intermittent Bonded Ribbon Production Line: Process And Equipment
Throughout an intermittent bonded ribbon production process, optical fibers are arranged 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 joins neighboring subunits at spaced points and leaves flexible sections between the bonds.
Arrange Adjacent Optical Fibers Into Subunits
The planned ribbon layout determines how fibers are positioned 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 forms the subunits. Bonding material is deposited by a discrete coating applicator between neighboring subunits at spaced intervals, not continuously along their full length.
Create Diffusion Zones Through Wet-On-Wet Application
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. Optical fiber ribbon equipment supports these operations, although a complete equipment list, line speed, and production capacity are not specified.
| Process Stage | Material Or Action | Purpose |
|---|---|---|
| Fiber arrangement | Place fibers side by side | Set the ribbon layout |
| Subunit formation | Coat fiber groups with the first coating material | Hold two or more fibers as subunits |
| Intermittent bonding | Deposit the second material between neighboring 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 |
| Combined cure | Cure coating and bonds 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 arranging 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 match the ribbon design.
Gaps of 5 to 100 micrometers between subunits are described in example designs. A range of 10 to 1,000 millimeters is specified for intermittent bond spacing in example designs. Some bond deposits take a diamond-like shape, tapering at the ends and widening in the center. The disclosed examples should not be interpreted as fixed settings that apply to every line.
Ribbon manufacturing process control depends on the chosen material selection, bond layout, and curing method. Because the source material provides no line speeds, curing temperatures, or inspection intervals, avoid assuming any values for them.
Ribbon Flexibility, Bond Design, And Materials
Material selection and bond layout determine how the ribbon behaves during cable making and splicing. Each fiber is protected 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 form a gradual interface. Intermixing may also be increased by lower coating viscosity.
A diffusion zone forms at this interface, with properties that vary gradually. Differences in color, stiffness, surface friction, tear strength, or stretch may occur within this zone. The disclosed thickness range is 2 to 50 micrometers, while 5 to 15 micrometers is given as a narrower range.
Control Bond Placement, Spacing, And Geometry
Bond spacing determines where fiber subunits stay connected and where they can move freely. An intermittent bond layout creates unbonded spans separating the bond points. Some bond surfaces have a saddle shape made by intersecting convex and concave curves.
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 To Maintain Consistent Ribbon Production
Instead of using assumed pass limits, dependable fiber ribbon quality checks assess defined features. Design factors named in the patent include 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 join adjacent subunits at planned locations and leave unbonded lengths between connections. Review subunit alignment and gaps because movement can affect ribbon shape and bond geometry.
Assess Ribbon Flexibility And Rollability
Assess ribbon rollability by examining 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.
Verify Fiber Identification And Ribbon Configuration
Use fiber color coding to confirm the position of each fiber. A common 12-color sequence is blue, orange, green, brown, slate, white, red, black, yellow, violet, rose, and aqua. The color sequence may repeat when a ribbon has more than 12 fibers.
Applications, Cable Integration, And Splicing Benefits
By folding 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 more effective 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. Dry water blocking is used in FusionLink, which comes with either 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. This approach may reduce splice time where ribbon routes are compatible. When connecting to loose-tube cable, technicians separate 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. Choosing indoor and outdoor fiber cable to suit the route aligns its construction with building, aerial, and underground requirements.
Final Conclusions
An intermittent bonded ribbon line guide covers fiber layout, bond placement, curing, and inspection. The process produces a flexible optical fiber ribbon that stays organized for handling while rolling or folding 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 helps maintain 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 balance fiber alignment, bond strength, and rollability. This balance may make cable packaging simpler while ensuring ribbons remain prepared for efficient installation and splicing.