Intermittent Bonded Ribbon Production Line Guide
At defined intervals, an intermittent bonded ribbon production line joins fiber subunits. This keeps 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 deposit bonding material before the subunit coating cures. Diffusion can occur through 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. These methods illustrate how optical fiber ribbon manufacturing and fiber optic bonding operate together.
Fiber Cable Sheathing Line Fibers In Stainless Steel Tube Fiber Secondary Coating 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 sit inside a cable.
The Arrangement Of Fiber Subunits And Intermittent Bonds
A coating holds each adjacent fiber pair or group together. These optical fiber subunits connect to neighboring subunits at separated bond points rather than along their full length. 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
Differences Between Rollable Ribbons And Conventional Flat Ribbons
In a conventional flat ribbon, the fibers remain in a single fixed plane. Between bonds, a rollable fiber ribbon can fold 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 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 arranged side by side along the ribbon’s length. Subunits are formed when a first material coats groups containing two or more fibers. Neighboring subunits are joined at separate points with a second material, leaving flexible sections between bonds.
Organize Adjacent Optical Fibers Into Subunits
The planned ribbon layout determines how fibers are arranged next to one another. The first coating material surrounds each selected group and holds its fibers together as a subunit.
Apply 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.
Create Diffusion Zones Through Wet-On-Wet Application
During wet-on-wet bonding, the subunit coating remains uncured when bonding material is applied. The materials intermix 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. Optical fiber ribbon equipment supports these operations, although a complete equipment list, line speed, and production capacity are not specified.
| Production Stage | Material Or Operation | Intended Purpose |
|---|---|---|
| Optical fiber arrangement | Arrange fibers next to one another | Establish the ribbon layout |
| Formation of subunits | Coat fiber groups with the first coating material | Keep groups of two or more fibers together as subunits |
| Intermittent bonding | Deposit the second material between neighboring 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 | Set the coating and bonds together in one step | Set the assembled ribbon structure |
Main Production Line Stages And Process Controls
Fiber ribbon production stages take place in a specific 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. 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. Bond deposits may have a diamond-like outline with narrow ends and a broader 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. Because the source material provides no line speeds, curing temperatures, or inspection intervals, avoid assuming any values for them.
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.
Choose Compatible Coating And Bonding Materials
Subunit coatings and ribbon bonding materials have distinct functions, so their formulas need not be identical. A gradual interface can be created by resins that intermix or remain at least partly soluble. Lower coating viscosity may also encourage intermixing.
A diffusion zone forms at this interface, with properties that vary gradually. Differences in color, stiffness, surface friction, tear strength, or stretch may occur within this zone. Disclosed thicknesses range 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. An intermittent bond layout creates unconnected 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 flexes during cable installation while keeping fibers organized for splicing.
Quality Checks To Maintain Consistent Ribbon Production
Reliable fiber ribbon quality checks evaluate defined features rather than relying on assumed pass limits. Design factors named in the patent include bond spacing, subunit gaps, diffusion-zone thickness, and bond shape. However, it does not specify inspection methods or acceptance limits.
Inspect 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
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.
Confirm Fiber Identification And Ribbon Configuration
Use fiber color coding to check the position of each fiber. A common 12-color sequence is blue, orange, green, brown, slate, white, red, black, yellow, violet, rose, and aqua. The color sequence may repeat when a ribbon has more than 12 fibers.
Cable Applications, Integration, And Splicing Benefits
By rolling 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 improved 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 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 hold 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 shorten splice time. For loose-tube cable connections, technicians separate the ribbon fibers and splice them one by one using 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 align cable construction with the needs of buildings, aerial runs, and underground installations.
Conclusion
Fiber layout, bond placement, curing, and inspection are combined in an intermittent bonded ribbon line guide. The process produces a flexible optical fiber ribbon that stays organized for handling while rolling or folding into compact cable designs.
The process involves applying bonds while the subunit coating is still uncured. The materials create a diffusion zone before curing together. Careful control throughout the process supports reliable fiber cable manufacturing.
Mass-fusion ribbon splicing is also supported by flexible ribbons, helping crews splice many fibers in one operation. Prysmian describes FlexRibbon in various cable designs, including compact configurations containing 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 ease cable packaging while keeping ribbons ready for efficient installation and splicing.