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 fold into a compact cable shape. The design enables flexible ribbon cable production without compromising efficient fiber handling.
In some processes, bonding material is applied while the subunit coating is still uncured. Diffusion can occur across 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. Together, these methods demonstrate the connection between optical fiber ribbon manufacturing and fiber optic bonding.
Fiber Draw Tower Fiber Draw Tower Fiber Ribbone Line
Understanding What An Intermittent Bonded Fiber Ribbon Is
An intermittent bonded fiber ribbon organizes optical fibers into small subunits. 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
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 make up 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 holds its fibers in a single fixed plane. Between bonds, a rollable fiber ribbon can curl without losing the fiber alignment needed for mass-fusion splicing. Prysmian’s FlexRibbon uses compact bonding points to permit bending and folding.
Why Flexible Ribbons Support 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.
Process And Equipment For An Intermittent Bonded Ribbon Production Line
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. Neighboring subunits are joined at spaced points with a second material, leaving flexible sections between 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 creates 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
During wet-on-wet bonding, the subunit coating remains uncured when bonding material is applied. A diffusion zone develops as the materials intermix through their shared interface.
Set The Subunit Coating And Bonds In One Cure
A single curing step cures 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 Operation | Intended Purpose |
|---|---|---|
| Optical fiber arrangement | Place fibers side by side | Establish the ribbon layout |
| Subunit formation | Coat fiber groups with the first coating material | Hold two or more fibers as subunits |
| Bonding at intervals | Apply the second material between adjacent subunits | Join subunits at spaced points |
| Wet-on-wet bonding 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
Fiber ribbon production stages take place in a set sequence. 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 positioning 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, narrowing at the ends and widening in the center. The disclosed examples should not be interpreted as fixed settings that apply to every line.
Ribbon manufacturing process control depends on the chosen material selection, bond layout, and curing method. Because the source material provides no line speeds, curing temperatures, or inspection intervals, avoid assuming any values for them.
Materials, Bond Design, And Ribbon Flexibility
Ribbon behavior during cable making and splicing depends on the chosen materials and bond layout. Coatings protect each fiber while permitting the subunits to flex as intended.
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. Resins that mix or remain at least partly soluble can produce a gradual interface. Intermixing may also be encouraged by lower coating viscosity.
This interface creates a diffusion zone in which properties change 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
Where subunits remain linked or move freely is governed by bond spacing. Intermittent bond geometry provides unbonded spans between bond points. Intersecting convex and concave curves create the saddle shape used on some bond surfaces.
Balance Ribbon Flexibility With Fiber Organization
Between bonds, unbonded spans let a flat ribbon move into a rolled, curled, or folded form. 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 evaluate 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. However, it does not establish inspection methods or acceptance limits.
Check Bond Continuity And Subunit Alignment
Verify that intermittent bonds join adjacent subunits at the planned positions, with unbonded lengths between them. Review subunit alignment and gaps because movement can affect 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. Throughout the ribbon design, evaluate bond spacing and flexibility. These comparisons are checks of the design, 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.
Applications, Cable Integration, And Splicing Benefits
Intermittently bonded ribbons can fold 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 support 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. On compatible ribbon routes, this method can reduce 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
Applications for ribbon cable include point-to-point network links, 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.
In this process, bonds are placed 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. FlexRibbon is described by Prysmian as suitable for various cable designs, including compact configurations with up to 6,912 fibers.
For manufacturers and network planners, the priority is to coordinate fiber alignment, bond strength, and rollability. Achieving that balance can simplify cable packaging while keeping ribbons ready for efficient installation and splicing.