Guide To The Intermittent Bonded Ribbon Production Line
An intermittent bonded ribbon production line joins fiber subunits at set intervals. 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.
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. 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 operate together.
Intermittent Bonded Ribbon Compact Fiber Unit Compact Fiber Unit
What Is An Intermittent Bonded Fiber Ribbon?
An intermittent bonded fiber ribbon organizes optical fibers into small subunits. 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
Each neighboring pair or group of fibers is held together by a coating. These optical fiber subunits connect to neighboring subunits at spaced bond points rather than along their full length. A 12-fiber design may include six two-fiber subunits. 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 curl between bonds while retaining fiber alignment for mass-fusion splicing. Bending and folding are supported by the discrete bonding points used in Prysmian’s FlexRibbon.
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 formed when a first material coats groups containing two or more fibers. A second material links neighboring subunits at spaced points and leaves flexible sections between the bonds.
Organize Adjacent Optical Fibers Into Subunits
Fibers are positioned beside one another according to the planned ribbon layout. Each selected group becomes a subunit when the first coating material encases and holds its fibers together.
Deposit Subunit Coating And Intermittent Bonding Material
Fiber ribbon coating creates the subunits. 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
During wet-on-wet bonding, the subunit coating remains unset when bonding material is applied. The materials intermix 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 are not provided.
| Process Stage | Material Or Action | Purpose |
|---|---|---|
| Fiber arrangement | Arrange fibers next to one another | Establish the ribbon layout |
| Formation of subunits | Coat fiber groups with the first coating material | Hold two or more fibers 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 |
| Combined cure | 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. Workers arrange fibers into subunits, apply a subunit coating, add intermittent bonds between adjacent subunits, and then cure both together. Optical fiber coating application and bond placement must correspond to the ribbon design.
Example designs specify gaps of 5 to 100 micrometers between subunits. Example intermittent bond spacing ranges from 10 to 1,000 millimeters. 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.
The selected materials, bond layout, and curing method influence ribbon manufacturing process control. 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 govern how the ribbon behaves during cable making and splicing. 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. Intermixing may also be encouraged by lower coating viscosity.
A diffusion zone forms at this interface, with properties that vary gradually. Differences in colour, 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
Bond spacing determines where fiber subunits stay connected and where they can move freely. 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
Between bonds, unbonded spans let a flat ribbon transform into a rolled, curled, or folded form. A flexible fiber ribbon design flexes 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. Design factors named in the patent include bond spacing, subunit gaps, diffusion-zone thickness, and bond shape. However, it does not establish inspection methods or acceptance limits.
Inspect Bond Continuity And Subunit Alignment
Check that intermittent bonds connect adjacent subunits at planned locations and leave unbonded lengths between connections. Subunit alignment and gaps require checking because shifts may change ribbon shape and bond geometry.
Assess Ribbon Flexibility And Rollability
Assess ribbon rollability by examining how the ribbon bends and gathers without changing fiber order. Throughout the ribbon design, compare bond spacing and flexibility. These comparisons are design checks, not universal 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. For ribbons containing more than 12 fibers, this sequence may be repeated.
Applications, Cable Integration, And Splicing Benefits
By folding 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.
Enable High-Density Cable Designs And Better Duct Utilization
For indoor, outdoor, and indoor/outdoor applications, Prysmian offers FusionLink and MassLink with FlexRibbon. FusionLink features 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. 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 joins 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.
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. 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 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 applying bonds while the subunit coating is still uncured. Before they cure together, the materials form a diffusion zone. Reliable fiber cable manufacturing is supported by careful control at every stage.
Mass-fusion ribbon splicing is also enabled 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. This balance may make cable packaging simpler while ensuring ribbons remain prepared for efficient installation and splicing.