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. Flexible ribbon cable production is supported by this design while maintaining 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. These methods illustrate how optical fiber ribbon manufacturing and fiber optic bonding operate together.
Intermittent Bonded Ribbon Production Line Intermittent Bonded Ribbon SZ Stranding Line
What Is An Intermittent Bonded Fiber Ribbon?
An intermittent bonded fiber ribbon groups optical fibers into small subunits. 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
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 linked to neighboring subunits at spaced bond points. Six two-fiber subunits may make up a 12-fiber design. 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. Prysmian’s FlexRibbon uses compact bonding points to permit bending and folding.
How Flexible Ribbons Enable Compact, High-Density Cables
Ribbon flexibility limits the space it occupies inside a high-density fiber cable. Cable designers can therefore accommodate more fibers in a compact structure without sacrificing an organized fiber layout.
Intermittent Bonded Ribbon Production Line: Process And Equipment
The intermittent bonded ribbon production process aligns optical fibers side by side along the ribbon’s length. Subunits are formed when a first material coats groups containing two or more fibers. A second material links neighboring subunits at spaced points and leaves flexible sections between the bonds.
Organize Adjacent Optical Fibers Into Subunits
Fibers are placed beside one another according to the planned ribbon layout. The first coating material surrounds each selected group and holds its fibers together as a subunit.
Deposit 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.
Use Wet-On-Wet Application To Form Diffusion Zones
During wet-on-wet bonding, the subunit coating remains unset 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 cured in one curing step. Optical fiber ribbon equipment performs 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 |
| Subunit formation | Coat fiber groups with the first coating material | Keep groups of two or more fibers together as subunits |
| Bonding at intervals | Deposit the second material between neighboring subunits | Connect subunits at separated bond points |
| Wet-on-wet interface | Deposit bonds while the subunit coating remains uncured | Allow materials to form a diffusion zone |
| Combined cure | Cure coating and bonds in one step | Cure the assembled ribbon structure |
Key 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. 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. These are disclosed examples, not fixed parameters for every production 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
Material selection and bond layout determine how the ribbon behaves during cable making and splicing. Each fiber is protected by coatings that still allow the subunits to flex as designed.
Select Compatible Coating And Bonding Materials
Subunit coatings and ribbon bonding materials have different 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. The zone may differ in color, stiffness, surface friction, tear strength, or stretch. Disclosed thicknesses range 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. Intersecting convex and concave curves form the saddle shape used on some bond surfaces.
Balance Ribbon Flexibility With Fiber Organization
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
Reliable fiber ribbon quality checks measure 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. The patent does not, however, define inspection methods or acceptance limits.
Check Bond Continuity And Subunit Alignment
Verify that intermittent bonds join adjacent subunits at the intended positions, with unbonded lengths between them. Subunit alignment and gaps require checking because shifts may change ribbon shape and bond geometry.
Assess Ribbon Flexibility And Rollability
Assess ribbon rollability by observing 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.
Confirm 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. For ribbons containing more than 12 fibers, this sequence may repeat.
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 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 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 reduce 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
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 matches its construction with building, aerial, and underground requirements.
Final Conclusions
An intermittent bonded ribbon line guide brings together fiber layout, bond placement, curing, and inspection. 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 applied before the subunit coating cures. Before they cure together, the materials form a diffusion zone. 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. 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.