Guide To The Intermittent Bonded Ribbon Production Line
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 maintaining efficient fiber handling.
In some processes, bonding material is added while the subunit coating is still uncured. The materials can intermix across their interface and 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 Fibers In Stainless Steel Tube Fiber Secondary Coating Line
Understanding What An Intermittent Bonded Fiber Ribbon Is
Optical fibers are grouped into small subunits in an intermittent bonded fiber ribbon. Although they remain organized for splicing, the subunits can change their shape to fit within 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 separated bond points rather than along their full length. A 12-fiber design may include 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
How Rollable Ribbons Differ From Conventional Flat Ribbons
In a conventional flat ribbon, the fibers remain in a single fixed plane. Between bonds, a rollable fiber ribbon can curl without losing the fiber alignment needed for mass-fusion splicing. Bending and folding are supported by the discrete bonding points used in Prysmian’s FlexRibbon.
Why Flexible Ribbons Support Compact, High-Density Cables
Ribbon flexibility limits 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
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. Neighboring subunits are joined at spaced points with a second material, leaving flexible sections between bonds.
Organize Adjacent Optical Fibers Into Subunits
Fibers are positioned beside one another according to the planned ribbon layout. The first coating material encloses each selected group and holds its fibers together as a subunit.
Deposit Subunit Coating And Intermittent Bonding Material
Fiber ribbon coating forms the subunits. A discrete coating applicator places bonding material between neighboring subunits at intervals rather than along their entire 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 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. Optical fiber ribbon equipment performs these operations, although a complete equipment list, line speed, and production capacity are not specified.
| Production Stage | Material Or Operation | Intended Purpose |
|---|---|---|
| Optical fiber arrangement | Place fibers side by side | Establish the ribbon layout |
| Formation of subunits | 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 | Apply bonds before the subunit coating cures | Enable formation of a diffusion zone between the materials |
| Joint curing step | Set the coating and bonds together in one step | Set the assembled ribbon structure |
Key Production Line Stages And Process Controls
The fiber ribbon production stages follow 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. Example intermittent bond spacing extends from 10 to 1,000 millimeters. Bond deposits may have a diamond-like outline with narrow ends and a broader center. The disclosed examples should not be interpreted as fixed settings that apply to every line.
Ribbon manufacturing process control depends on the chosen materials, bond layout, and curing method. The source material does not specify line speeds, curing temperatures, or inspection intervals, so these values must not be inferred.
Ribbon Flexibility, Bond Design, And Materials
Material selection and bond layout determine how the ribbon behaves during cable making and splicing. Each fiber is covered 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. A gradual interface can be formed 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. The zone may differ in color, stiffness, surface friction, tear strength, or stretch. 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. An intermittent bond layout creates unconnected 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
Unbonded spans allow the ribbon to shift from a flat layout into a rolled, curled, or folded shape. During cable installation, a flexible fiber ribbon can flex without disrupting the fiber organization needed for splicing.
Quality Checks To Maintain 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. The patent does not, however, define 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
Assess ribbon rollability by examining how the ribbon bends and gathers without changing fiber order. Compare bond spacing and flexibility across the entire ribbon design. Treat these comparisons as design checks rather than general production tolerances.
Confirm Fiber Identification And Ribbon Configuration
Confirm each fiber’s position using 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
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
For indoor, outdoor, and indoor/outdoor applications, Prysmian offers 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 accommodate spans of up to 300 feet. As a small-diameter outdoor option, FlexDrop can support up to two 12-fiber ribbons.
Enable Mass-Fusion Splicing And Faster Deployment
Multiple ribbon fibers, often 12 at a time, are spliced in one operation through mass-fusion splicing. This approach may reduce 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.
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 brings together 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 develop a diffusion zone. Reliable fiber cable manufacturing is encouraged by careful control at every stage.
Mass-fusion ribbon splicing is also enabled 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.
For manufacturers and network planners, the priority is 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.
