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.
In some processes, bonding material is added while the subunit coating is still uncured. 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.
Fiber Draw Tower Compact Fiber Unit SZ Stranding Line
Understanding What An Intermittent Bonded Fiber Ribbon Is
Optical fibers are arranged into small subunits in an intermittent bonded fiber ribbon. Although they remain organized for splicing, the subunits can adjust their shape to fit within a cable.
The Arrangement Of Fiber Subunits And Intermittent Bonds
A coating holds each adjacent fiber pair or group together. Instead of joining along their entire length, these optical fiber subunits are linked 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 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.
Why Flexible Ribbons Support Compact, High-Density Cables
Inside a high-density fiber cable, a flexible ribbon can take up less space. This enables cable designers to fit more fibers into a compact structure while maintaining 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
Fibers are placed 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.
Deposit Subunit Coating And Intermittent Bonding Material
Fiber ribbon coating forms 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
Wet-on-wet bonding involves applying 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
Both the subunit coating and the intermittent bonds are set in one curing step. 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 | Intended Purpose |
|---|---|---|
| Optical fiber arrangement | Place fibers side by side | Set the ribbon layout |
| Subunit formation | Apply the first coating material around fiber groups | Keep groups of two or more fibers together as subunits |
| Intermittent bonding | Apply the second material between adjacent subunits | Connect subunits at separated bond points |
| Wet-on-wet interface | Deposit bonds while the subunit coating remains uncured | Enable formation of a diffusion zone between the materials |
| Combined cure | Set the coating and bonds together in one step | Cure the assembled ribbon structure |
Main Production Line Stages And Process Controls
The fiber ribbon production stages proceed in a defined order. The sequence involves arranging fibers into subunits, applying a subunit coating, placing intermittent bonds between adjacent subunits, and curing the coating and bonds 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, tapering at the ends and widening in the center. The disclosed examples should not be interpreted as fixed settings that apply to every 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
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.
Choose Compatible Coating And Bonding Materials
Subunit coatings and ribbon bonding materials have different functions, so their formulas need not be identical. Resins that mix or remain at least partly soluble can form a gradual interface. Intermixing may also be increased by lower coating viscosity.
This interface forms a diffusion zone in which properties change 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 identified as a narrower range.
Manage Bond Placement, Spacing, And Geometry
Where subunits remain joined 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
Unbonded spans allow the ribbon to shift from a flat layout into a rolled, curled, or folded shape. During cable installation, a flexible fiber ribbon can flex without disrupting the fiber organization needed for splicing.
Quality Checks For Consistent Ribbon Production
Instead of using assumed pass limits, dependable fiber ribbon quality checks assess defined features. Design factors named in the patent include the spacing of bonds, 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
Check that intermittent bonds connect adjacent subunits at planned locations and leave unbonded lengths between connections. Subunit alignment and gaps require review because shifts may change 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. Compare bond spacing and flexibility across the overall ribbon design. These comparisons are checks of the design, not universal production tolerances.
Verify 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 common 12-color sequence. For ribbons containing more than 12 fibers, this sequence may be repeated.
Cable Applications, Integration, And Splicing Benefits
Intermittently bonded ribbons can roll 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
For indoor, outdoor, and indoor/outdoor applications, Prysmian provides 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 accommodate 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 joins several ribbon fibers in a single operation, often 12 at once. 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.
Consider Indoor, Outdoor, Access, And Broadband Uses
Ribbon cable is used in point-to-point networks, 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 organized during handling yet can roll or fold into compact cable designs.
The process involves depositing bonds while the subunit coating is still uncured. The materials form a diffusion zone before curing together. Reliable fiber cable manufacturing is supported 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 various 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.