ESSENTIAL STAGES OF FIBER RIBBON PRODUCTION
Intermittent Bonded Ribbon Production Line Guide
At set intervals, an intermittent bonded ribbon production line joins fiber subunits. This maintains fibers in an organized arrangement for mass-fusion splicing while letting the ribbon roll or fold 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. The materials can intermix across their interface and 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.
SZ Stranding Line Fiber Coloring Machine Fiber Draw Tower
What Is An Intermittent Bonded Fiber Ribbon?
An intermittent bonded fiber ribbon organizes 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
Each adjacent pair or group of fibers is held together by a coating. Instead of joining along their entire length, these optical fiber subunits are connected to neighboring subunits at spaced bond points. Six two-fiber subunits may form a 12-fiber design. 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
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
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 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
Fibers are placed 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.
Apply Subunit Coating And Intermittent Bonding Material
The subunits are formed by fiber ribbon coating. Bonding material is deposited 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
Wet-on-wet bonding involves depositing the bonding material before the subunit coating has cured. 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. 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 | 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 | Apply the second material between adjacent subunits | Join subunits at spaced points |
| Wet-on-wet bonding 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 |
Key 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. 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 wider 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 the chosen materials and bond layout. Each fiber is protected by coatings that still allow the subunits to flex as designed.
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 formed by resins that intermix or remain at least partly soluble. Intermixing may also be encouraged 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. The disclosed thickness range is 2 to 50 micrometers, while 5 to 15 micrometers is given as a narrower range.
Manage Bond Placement, Spacing, And Geometry
Where subunits remain linked or move freely is governed by bond spacing. Intermittent bond geometry provides 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
Reliable fiber ribbon quality checks evaluate defined features rather than relying on assumed pass limits. 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.
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 shifts can affect ribbon shape and bond geometry.
Assess Ribbon Flexibility And Rollability
Assess ribbon rollability by observing how the ribbon bends and gathers without changing fiber order. Compare bond spacing and flexibility across the overall ribbon design. Treat these comparisons as design checks rather than universal production tolerances.
Confirm Fiber Identification And Ribbon Configuration
Use fiber color coding to check 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 start again 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. Prysmian says FlexRibbon supports high-density ribbon cable designs, smaller diameters, and better 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. FusionLink features dry water blocking and is available with 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
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. When connecting to loose-tube cable, technicians separate ribbon fibers and individually splice them with a single-fiber splicer.
Consider Indoor, Outdoor, Access, And Broadband Uses
Applications for ribbon cable include point-to-point network links, 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 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. The materials form a diffusion zone before curing together. 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. 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.