Intermittent Bonded Ribbon Production Line Guide
An intermittent bonded ribbon production line connects fiber subunits at set intervals. 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.
In some processes, bonding material is added while the subunit coating is still uncured. The materials can diffuse across their interface and cure together. One commercial example is Prysmian’s FlexRibbon technology, whose original design the company says dates to 2018. Together, these methods demonstrate the connection between optical fiber ribbon manufacturing and fiber optic bonding.
Intermittent Bonded Ribbon Fiber Secondary Coating Line Fiber Secondary Coating Line
What Is An Intermittent Bonded Fiber Ribbon?
Optical fibers are grouped into small subunits in an intermittent bonded fiber ribbon. The subunits stay organized for splicing while remaining able to change shape to fit inside a cable.
How Fiber Subunits And Intermittent Bonds Are Arranged
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 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
Differences Between Rollable Ribbons And Conventional Flat Ribbons
A conventional flat ribbon keeps its fibers in a single fixed plane. A rollable fiber ribbon can fold 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.
Why Flexible Ribbons Support 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.
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. A first material coats groups of two or more fibers to create subunits. Neighboring subunits are joined at spaced 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.
Deposit Subunit Coating And Intermittent Bonding Material
The subunits are created by fiber ribbon coating. Bonding material is deposited 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
During wet-on-wet bonding, the subunit coating remains uncured when bonding material is applied. A diffusion zone develops as the materials intermix through their shared interface.
Cure The Subunit Coating And Bonds Together
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 |
|---|---|---|
| Fiber arrangement | Place fibers side by side | Set the ribbon layout |
| Formation of subunits | Apply the first coating material around fiber groups | Hold two or more fibers as subunits |
| Intermittent bonding | Deposit the second material between neighboring subunits | Join subunits at spaced 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 | Set the assembled ribbon structure |
Key Production Line Stages And Process Controls
Fiber ribbon production stages take place in a specific sequence. Workers arrange fibers into subunits, apply a subunit coating, add intermittent bonds between adjacent subunits, and then cure both together. The ribbon design must guide both optical fiber coating application and positioning of the bonds.
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 broader center. The disclosed examples should not be interpreted as fixed settings that apply to every line.
Ribbon manufacturing process control depends on the chosen material selection, bond layout, and curing method. Because the source material provides no line speeds, curing temperatures, or inspection intervals, avoid assuming any values for them.
Materials, Bond Design, And Ribbon Flexibility
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
Subunit coatings and ribbon bonding materials have distinct functions, so their formulas need not be identical. Resins that mix or remain at least partly soluble can form a gradual interface. Lower coating viscosity may also promote intermixing.
A diffusion zone forms at this interface, with properties that change 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
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 form the saddle shape used on some bond surfaces.
Maintain Fiber Organization While Balancing Ribbon Flexibility
Between bonds, unbonded spans let a flat ribbon transform into a rolled, curled, or folded form. A flexible fiber ribbon design bends during cable installation while keeping fibers organized for splicing.
Quality Checks For 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 the spacing of bonds, subunit gaps, diffusion-zone thickness, and bond shape. However, it does not specify 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. Review subunit alignment and gaps because shifts can affect ribbon shape and bond geometry.
Assess 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 checks of the design, 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. The color sequence may repeat when a ribbon has more than 12 fibers.
Applications, Cable Integration, And Splicing Benefits
Intermittently bonded ribbons can fold 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. Dry water blocking is used in FusionLink, which comes with either 250 μm or 200 μm ribbon. EcoSpan aerial cable supports spans of up to 300 feet under NESC Heavy loading conditions. FlexDrop is a small-diameter outdoor option that accommodates 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 split 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 match cable construction with the needs of buildings, aerial runs, and underground installations.
Conclusion
An intermittent bonded ribbon line guide covers fiber layout, bond placement, curing, and inspection. The process produces a flexible optical fiber ribbon that stays organized for handling while rolling or folding 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 enabled 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. This balance may make cable packaging simpler while ensuring ribbons remain prepared for efficient installation and splicing.