Intermittent Bonded Ribbon Production Line Guide
At set 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.
Some processes deposit 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. These methods illustrate how optical fiber ribbon manufacturing and fiber optic bonding operate together.
Intermittent Bonded Ribbon Fiber Coloring Machine Fiber Ribbone Line
What Is An Intermittent Bonded Fiber Ribbon?
An intermittent bonded fiber ribbon groups optical fibers into small subunits. 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 neighboring 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. 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
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 small bonding points used in Prysmian’s FlexRibbon.
How Flexible Ribbons Enable Compact, High-Density Cables
Inside a high-density fiber cable, a flexible ribbon can occupy less space. Cable designers can therefore fit more fibers in a compact structure without sacrificing an organized fiber layout.
Process And Equipment For An Intermittent Bonded Ribbon Production Line
The intermittent bonded ribbon production process aligns optical fibers 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 separate 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 surrounds and holds its fibers together.
Deposit Subunit Coating And Intermittent Bonding Material
Fiber ribbon coating forms the subunits. Bonding material is applied 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.
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.
| Production Stage | Material Or Action | Intended Purpose |
|---|---|---|
| Optical fiber arrangement | Place fibers side by side | Set the ribbon layout |
| Subunit formation | Apply the first coating material around fiber groups | 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 | Enable formation of a diffusion zone between the materials |
| 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 set sequence. 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 match the ribbon design.
Gaps of 5 to 100 micrometers between subunits are given in example designs. A range of 10 to 1,000 millimeters is specified for intermittent bond spacing in example designs. Bond deposits may have a diamond-like outline with narrow ends and a wider center. These are disclosed examples, not fixed parameters 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 inferred.
Ribbon Flexibility, Bond Design, And Materials
Ribbon behavior during cable making and splicing depends on the chosen materials and bond layout. Coatings shield each fiber while permitting the subunits to flex as intended.
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 created by resins that intermix or remain at least partly soluble. Intermixing may also be increased by lower coating viscosity.
A diffusion zone forms at this interface, with properties that vary gradually. The zone may differ in color, stiffness, surface friction, tear strength, or stretch. 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
Bond spacing controls where fiber subunits stay connected and where they can move freely. Intermittent bond geometry leaves unbonded spans between bond points. Intersecting convex and concave curves form the saddle shape used on some bond surfaces.
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. During cable installation, a flexible fiber ribbon can bend without disrupting the fiber organization needed for splicing.
Quality Checks To Maintain Consistent Ribbon Production
Instead of using assumed pass limits, dependable fiber ribbon quality checks assess defined features. The patent identifies design factors such as bond spacing, subunit gaps, diffusion-zone thickness, and bond shape. The patent does not, however, provide 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. Subunit alignment and gaps require review because shifts may change ribbon shape and bond geometry.
Assess Ribbon Flexibility And Rollability
To evaluate ribbon rollability, observe whether it bends and gathers while keeping fibers in their original order. Throughout the ribbon design, evaluate bond spacing and flexibility. Treat these comparisons as design checks rather than 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 widely used 12-color sequence. For ribbons containing more than 12 fibers, this sequence may repeat.
Cable Applications, Integration, And Splicing Benefits
By folding 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.
Enable High-Density Cable Designs And Better Duct Utilization
Prysmian offers FusionLink and MassLink with FlexRibbon in indoor, outdoor, and indoor/outdoor designs. FusionLink uses 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. As a small-diameter outdoor option, FlexDrop can support up to two 12-fiber ribbons.
Support Mass-Fusion Splicing And Quicker Deployment
Multiple ribbon fibers, often 12 at a time, are joined in one operation through mass-fusion splicing. On compatible ribbon routes, this method can reduce splice time. When connecting to loose-tube cable, technicians separate ribbon fibers and individually splice them with 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.
Conclusion
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 applied before the subunit coating cures. The materials form a diffusion zone before curing together. Reliable fiber cable manufacturing is encouraged by careful control at every stage.
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.
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.