Intermittent Bonded Ribbon Production Line Guide
At defined intervals, an intermittent bonded ribbon production line joins fiber subunits. 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 preserving 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. 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 work in combination.
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What Is An Intermittent Bonded Fiber Ribbon?
Optical fibers are grouped into small subunits in an intermittent bonded fiber ribbon. 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 secures each adjacent fiber pair or group together. These optical fiber subunits connect to neighboring subunits at spaced bond points rather than along their full length. Six two-fiber subunits may make up 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
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. 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 occupy less space. 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
The intermittent bonded ribbon production process places optical fibers side by side along the ribbon’s length. Subunits are formed 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
Fibers are positioned beside one another according to the planned ribbon layout. The first coating material surrounds each selected group and holds its fibers together as a subunit.
Deposit Subunit Coating And Intermittent Bonding Material
Fiber ribbon coating creates the subunits. Bonding material is applied 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
During wet-on-wet bonding, the subunit coating remains uncured 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 | Arrange fibers next to one another | Set the ribbon layout |
| Subunit formation | Coat fiber groups with the first coating material | Keep groups of two or more fibers together 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 | Allow materials to form a diffusion zone |
| Combined cure | Cure coating and bonds in one step | Set 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. 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 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. These are disclosed examples, not fixed settings for every production line.
Ribbon manufacturing process control depends on the chosen material selection, bond layout, and curing method. The source material does not specify line speeds, curing temperatures, or inspection intervals, so these values must not be assumed.
Ribbon Flexibility, Bond Design, And Materials
Ribbon behavior during cable making and splicing depends on material choice and bond layout. Coatings protect each fiber while permitting the subunits to flex as intended.
Select Compatible Coating And Bonding Materials
Subunit coatings and ribbon bonding materials have different functions, so their formulas need not be identical. 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 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 identified as a narrower range.
Control Bond Placement, Spacing, And Geometry
Where subunits remain joined 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.
Balance Ribbon Flexibility With Fiber Organization
Between bonds, unbonded spans let a flat ribbon transform into a rolled, curled, or folded form. During cable installation, a flexible fiber ribbon can flex without disrupting the fiber organization needed 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 specify inspection methods or acceptance limits.
Inspect Bond Continuity And Subunit Alignment
Verify that intermittent bonds join adjacent subunits at the intended positions, with unbonded lengths between them. Subunit alignment and gaps require checking because shifts may change ribbon shape and bond geometry.
Evaluate 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. These comparisons are design checks, not universal production tolerances.
Verify 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 repeat when a ribbon has more than 12 fibers.
Cable Applications, Integration, And Splicing Benefits
Intermittently bonded ribbons can fold 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 more effective 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. 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.
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 shorten splice time. 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.
Conclusion
Fiber layout, bond placement, curing, and inspection are addressed 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.
The process involves depositing bonds while the subunit coating is still uncured. Before they cure together, the materials develop 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.
Manufacturers and network planners need to balance fiber alignment, bond strength, and rollability. Achieving that balance can simplify cable packaging while keeping ribbons ready for efficient installation and splicing.