Intermittent Bonded Ribbon Production Line Guide
At set intervals, an intermittent bonded ribbon production line joins fiber subunits. This maintains 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 effective fiber handling.
In some processes, bonding material is added while the subunit coating is still uncured. Diffusion can occur through the shared interface before the materials cure together. One commercial example is Prysmian’s FlexRibbon technology, whose original design the company says dates to 2018. Together, these methods demonstrate the relationship between optical fiber ribbon manufacturing and fiber optic bonding.
Fiber Coloring Machine SZ Stranding Line Compact Fiber Unit
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 change their shape to fit within a cable.
How Fiber Subunits And Intermittent Bonds Are Arranged
Each adjacent pair or group of fibers is held together by a coating. These optical fiber subunits connect to neighboring subunits at separated bond points rather than along their full length. Six two-fiber subunits may form 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
Differences Between Rollable Ribbons And Conventional Flat Ribbons
In a conventional flat ribbon, the fibers remain in one fixed plane. Between bonds, a rollable fiber ribbon can fold without losing the fiber alignment needed for mass-fusion splicing. Prysmian’s FlexRibbon uses small bonding points to permit bending and folding.
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 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. A first material coats groups of two or more fibers to form subunits. Neighboring subunits are joined at spaced points with a second material, leaving flexible sections between 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 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 intermix 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. Optical fiber ribbon equipment supports these operations, although a complete equipment list, line speed, and production capacity are not specified.
| Production Stage | Material Or Action | Purpose |
|---|---|---|
| Optical fiber arrangement | Arrange fibers next to one another | Establish 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 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 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.
Gaps of 5 to 100 micrometers between subunits are given in example designs. A range of 10 to 1,000 millimeters is described for intermittent bond spacing in example designs. Some bond deposits take a diamond-like shape, tapering at the ends and widening in the center. These are disclosed examples, not fixed settings for every production line.
Ribbon manufacturing process control depends on the chosen materials, 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 material choice and bond layout. Coatings protect 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.
A diffusion zone forms at this interface, with properties that change gradually. Differences in color, stiffness, surface friction, tear strength, or stretch may occur within this zone. The disclosed thickness range is 2 to 50 micrometers, while 5 to 15 micrometers is given as a narrower range.
Control Bond Placement, Spacing, And Geometry
Where subunits remain joined 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
Unbonded spans allow the ribbon to shift from a flat layout into a rolled, curled, or folded shape. A flexible fiber ribbon design flexes during cable installation while keeping fibers organized 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. However, it does not establish inspection methods or acceptance limits.
Check Bond Continuity And Subunit Alignment
Check that intermittent bonds join 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.
Assess Ribbon Flexibility And Rollability
Assess ribbon rollability by observing how the ribbon bends and gathers without changing fiber order. Throughout the ribbon design, compare bond spacing and flexibility. 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 widely used 12-color sequence. The color sequence may repeat when a ribbon has more than 12 fibers.
Applications, Cable 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.
Support High-Density Cable Designs And 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 support spans of up to 300 feet. FlexDrop is a small-diameter outdoor option that accommodates up to two 12-fiber ribbons.
Enable Mass-Fusion Splicing And Faster 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. 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 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 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 multiple cable designs, including compact configurations with up to 6,912 fibers.
Manufacturers and network planners need to manage fiber alignment, bond strength, and rollability. Achieving that balance can simplify cable packaging while keeping ribbons ready for efficient installation and splicing.
