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 fold into a compact cable shape. Flexible ribbon cable production is supported by this design while maintaining efficient fiber handling.
Some processes apply 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. These methods illustrate how optical fiber ribbon manufacturing and fiber optic bonding work in combination.
Intermittent Bonded Ribbon Fibers In Stainless Steel Tube Fiber Coloring Machine
Understanding What An Intermittent Bonded Fiber Ribbon Is
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. These optical fiber subunits connect to neighboring subunits at separated bond points rather than along their full length. 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
Differences Between Rollable Ribbons And Conventional Flat Ribbons
A conventional flat ribbon keeps its fibers in a single 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.
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. A first material coats groups of two or more fibers to form subunits. 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 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 forms the subunits. A discrete coating applicator deposits 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. The materials diffuse across their shared interface to form a diffusion zone.
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 remain unspecified.
| Production Stage | Material Or Operation | Intended Purpose |
|---|---|---|
| Fiber arrangement | Place fibers side by side | Set the ribbon layout |
| Formation of subunits | Apply the first coating material around fiber groups | Keep groups of two or more fibers together as subunits |
| Bonding at intervals | Apply the second material between adjacent subunits | Join subunits at spaced points |
| Wet-on-wet interface | Apply bonds before the subunit coating cures | Allow materials to form a diffusion zone |
| Joint curing step | Set the coating and bonds together in one step | Cure the assembled ribbon structure |
Main Production Line Stages And Process Controls
The fiber ribbon production stages follow a defined order. 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 placement 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, tapering at the ends and widening in the center. These are disclosed examples, not fixed parameters 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
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.
Select Compatible Coating And Bonding Materials
Because subunit coatings and ribbon bonding materials serve different 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 encouraged by lower coating viscosity.
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 extend from 2 to 50 micrometers, with 5 to 15 micrometers representing a narrower range.
Control Bond Placement, Spacing, And Geometry
Where subunits remain joined or move freely is governed by bond spacing. Intermittent bond geometry leaves unbonded spans between 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 move into a rolled, curled, or folded form. A flexible fiber ribbon design bends 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 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.
Inspect 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
Assess ribbon rollability by observing how the ribbon bends and gathers without changing fiber order. Throughout the ribbon design, evaluate bond spacing and flexibility. Treat these comparisons as design checks rather than universal production tolerances.
Verify Fiber Identification And Ribbon Configuration
Use fiber color coding to confirm the position of each fiber. Blue, orange, green, brown, slate, white, red, black, yellow, violet, rose, and aqua make up a widely used 12-color sequence. The color sequence may repeat when a ribbon has more than 12 fibers.
Applications, Cable 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 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. Under NESC Heavy loading conditions, EcoSpan aerial cable can support spans of up to 300 feet. As a small-diameter outdoor option, FlexDrop can hold 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. For loose-tube cable connections, technicians separate the ribbon fibers and splice them one by one using a single-fiber splicer.
Consider Indoor, Outdoor, Access, And Broadband Uses
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 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. 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. 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. This balance may make cable packaging easier while ensuring ribbons remain prepared for efficient installation and splicing.