Intermittent Bonded Ribbon Production Line Guide
At set 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 maintaining efficient fiber handling.
In some processes, bonding material is applied while the subunit coating is still uncured. Diffusion can occur through 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.
Intermittent Bonded Ribbon Fibers In Stainless Steel Tube Fiber Ribbone Line
Understanding What An Intermittent Bonded Fiber Ribbon Is
Optical fibers are arranged into small subunits in an intermittent bonded fiber ribbon. The subunits stay organized for splicing while remaining able to change shape to fit 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 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
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. Prysmian’s FlexRibbon uses small bonding points to permit bending and folding.
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.
Intermittent Bonded Ribbon Production Line: Process And Equipment
The intermittent bonded ribbon production process aligns optical fibers 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.
Organize 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
The subunits are formed by fiber ribbon coating. 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
Wet-on-wet bonding involves applying the bonding material before the subunit coating has cured. A diffusion zone develops as the materials intermix 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.
| Production Stage | Material Or Operation | Purpose |
|---|---|---|
| Fiber arrangement | Place fibers side by side | Set the ribbon layout |
| Subunit formation | Coat fiber groups with the first coating material | 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 | Enable formation of a diffusion zone between the materials |
| Combined cure | Set the coating and bonds together in one step | Cure the assembled ribbon structure |
Key Production Line Stages And Process Controls
The fiber ribbon production stages proceed in a defined order. The sequence involves arranging 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 specified for intermittent bond spacing in example designs. Bond deposits may have a diamond-like outline with narrow ends and a wider center. The disclosed examples should not be treated as fixed settings that apply to every line.
Ribbon manufacturing process control depends on the chosen materials, bond layout, and curing method. Because the source material provides no line speeds, curing temperatures, or inspection intervals, do not presume any values for them.
Ribbon Flexibility, Bond Design, And Materials
Ribbon behavior during cable making and splicing depends on material choice 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 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 increased by lower coating viscosity.
This interface creates 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.
Manage 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.
Maintain Fiber Organization While Balancing Ribbon Flexibility
Unbonded spans allow the ribbon to change from a flat layout into a rolled, curled, or folded shape. 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 assess defined features. Design factors named in the patent include bond spacing, subunit gaps, diffusion-zone thickness, and bond shape. The patent does not, however, provide inspection methods or acceptance limits.
Check 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 review because shifts may change ribbon shape and bond geometry.
Assess Ribbon Flexibility And Rollability
To evaluate ribbon rollability, watch whether it bends and gathers while keeping fibers in their original order. Throughout the ribbon design, evaluate 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. Blue, orange, green, brown, slate, white, red, black, yellow, violet, rose, and aqua make up a common 12-color sequence. The color sequence may start again when a ribbon has more than 12 fibers.
Cable Applications, Integration, And Splicing Benefits
Intermittently bonded ribbons can roll inside a cable, enabling more fibers to fit into a compact design. Prysmian says FlexRibbon supports high-density ribbon cable designs, smaller diameters, and better fiber duct utilization.
Enable High-Density Cable Designs And Better Duct Utilization
For indoor, outdoor, and indoor/outdoor applications, Prysmian provides FusionLink and MassLink with FlexRibbon. 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. As a small-diameter outdoor option, FlexDrop can hold 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. This approach may shorten splice time where ribbon routes are compatible. 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. Selecting indoor and outdoor fiber cable for each route helps align cable construction with the needs of buildings, aerial runs, and underground installations.
Final Conclusions
Fiber layout, bond placement, curing, and inspection are combined 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.
In this process, bonds are placed before the subunit coating cures. Before they cure together, the materials develop 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. Achieving that balance can ease cable packaging while keeping ribbons ready for efficient installation and splicing.