Intermittent Bonded Ribbon Production Line Guide
An intermittent bonded ribbon production line joins fiber subunits at set intervals. This maintains fibers in an organized arrangement for mass-fusion splicing while letting the ribbon roll or fold into a compact cable shape. The design enables flexible ribbon cable production without compromising efficient fiber handling.
Some processes apply bonding material before the subunit coating cures. The materials can diffuse across their interface and cure together. Prysmian’s FlexRibbon technology provides one commercial example, and the company dates its original design to 2018. Together, these methods demonstrate the relationship between optical fiber ribbon manufacturing and fiber optic bonding.
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What Is An Intermittent Bonded Fiber Ribbon?
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 sit inside a cable.
How Fiber Subunits And Intermittent Bonds Are Arranged
Each adjacent pair or group of fibers is held together by a coating. These optical fiber subunits connect to neighboring subunits at separated bond points rather than along their full length. A 12-fiber design may use 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
How Rollable Ribbons Differ From Conventional Flat Ribbons
A conventional flat ribbon holds 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 small bonding points to permit bending and folding.
How Flexible Ribbons Enable Compact, High-Density Cables
Inside a high-density fiber cable, a flexible ribbon can take up less space. Cable designers can therefore fit more fibers in a compact structure without sacrificing an organized fiber layout.
Intermittent Bonded Ribbon Production Line: Process And Equipment
Throughout an intermittent bonded ribbon production process, optical fibers are laid 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
Fibers are positioned beside one another according to the planned ribbon layout. Each selected group becomes a subunit when the first coating material surrounds and holds its fibers together.
Apply Subunit Coating And Intermittent Bonding Material
Fiber ribbon coating creates the subunits. Bonding material is applied by a discrete coating applicator between neighboring subunits at spaced intervals, not continuously along their full length.
Create Diffusion Zones Through Wet-On-Wet Application
Wet-on-wet bonding involves applying the bonding material before the subunit coating has cured. The materials intermix across their shared interface to form a diffusion zone.
Set The Subunit Coating And Bonds In One Cure
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 remain unspecified.
| Production Stage | Material Or Action | 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 interface | Apply bonds before the subunit coating cures | Enable formation of a diffusion zone between the materials |
| Combined cure | Cure coating and bonds in one step | Cure 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. 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, tapering at the ends and widening in the center. These are disclosed examples, not fixed parameters for every production 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
Ribbon behavior during cable making and splicing depends on the chosen materials and bond layout. Each fiber is covered by coatings that still allow the subunits to flex as designed.
Select 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. 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
Bond spacing determines where fiber subunits stay connected and where they can move freely. An intermittent bond layout creates unbonded spans separating the 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 move into a rolled, curled, or folded form. A flexible fiber ribbon design bends during cable installation while keeping fibers organized 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. 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 design checks, not universal production tolerances.
Confirm Fiber Identification And Ribbon Configuration
Confirm each fiber’s position using fiber color coding. Blue, orange, green, brown, slate, white, red, black, yellow, violet, rose, and aqua make up a widely used 12-color sequence. For ribbons containing more than 12 fibers, this sequence may repeat.
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
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.
Enable Mass-Fusion Splicing And Faster Deployment
Multiple ribbon fibers, often 12 at a time, are spliced in one operation through mass-fusion splicing. On compatible ribbon routes, this method can reduce splice time. When connecting to loose-tube cable, technicians split 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 networks, indoor FTTH systems, MTP wiring-box links, and urban trunk routes. Selecting indoor and outdoor fiber cable for each route helps match 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 organized during handling yet can roll or fold into compact cable designs.
In this process, bonds are placed before the subunit coating cures. The materials create a diffusion zone before curing together. Careful control throughout the process helps maintain reliable fiber cable manufacturing.
Mass-fusion ribbon splicing is also supported 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.
For manufacturers and network planners, the priority is to balance fiber alignment, bond strength, and rollability. Achieving that balance can simplify cable packaging while keeping ribbons ready for efficient installation and splicing.