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. Flexible ribbon cable production is supported by this design while preserving efficient fiber handling.
In some processes, bonding material is applied while the subunit coating is still uncured. Diffusion can occur across 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.
SZ Stranding Line Compact Fiber Unit SZ Stranding 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 fit inside a cable.
The Arrangement Of Fiber Subunits And Intermittent Bonds
A coating secures each adjacent fiber pair or group together. Instead of joining along their entire length, these optical fiber subunits are connected to neighboring subunits at spaced bond points. A 12-fiber design may include six two-fiber subunits. 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 holds its fibers in a single fixed plane. Between bonds, a rollable fiber ribbon can fold without losing the fiber alignment needed for mass-fusion splicing. Bending and folding are supported by the discrete bonding points used in Prysmian’s FlexRibbon.
How Flexible Ribbons Enable Compact, High-Density Cables
Ribbon flexibility reduces the space it occupies inside a high-density fiber cable. This enables cable designers to fit more fibers into a compact structure while preserving an organized fiber layout.
Process And Equipment For An Intermittent Bonded Ribbon Production Line
Throughout an intermittent bonded ribbon production process, optical fibers are laid side by side along the ribbon’s length. A first material coats groups of two or more fibers to form subunits. A second material links neighboring subunits at spaced points and leaves flexible sections between the bonds.
Arrange Adjacent Optical Fibers Into Subunits
The planned ribbon layout determines how fibers are positioned next to one another. The first coating material encloses each selected group and holds its fibers together as a subunit.
Deposit Subunit Coating And Intermittent Bonding Material
The subunits are formed 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 unset when bonding material is applied. 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 | Hold two or more fibers as subunits |
| Bonding at intervals | Apply the second material between adjacent subunits | Connect subunits at separated bond points |
| Wet-on-wet bonding 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. Workers arrange fibers into subunits, apply a subunit coating, add intermittent bonds between adjacent subunits, and then cure both together. Optical fiber coating application and bond placement must match the ribbon design.
Gaps of 5 to 100 micrometers between subunits are described 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 wider center. These are disclosed examples, not fixed settings 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.
Materials, Bond Design, And Ribbon Flexibility
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
Because subunit coatings and ribbon bonding materials serve different roles, they do not have to share the same formula. A gradual interface can be formed by resins that intermix or remain at least partly soluble. Lower coating viscosity may also promote intermixing.
This interface creates 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 given as a narrower range.
Control Bond Placement, Spacing, And Geometry
Bond spacing controls where fiber subunits stay connected and where they can move freely. An intermittent bond layout creates unconnected 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
Between bonds, unbonded spans let a flat ribbon transform into a rolled, curled, or folded form. During cable installation, a flexible fiber ribbon can flex without disrupting the fiber organization needed for splicing.
Quality Checks To Maintain Consistent Ribbon Production
Instead of using assumed pass limits, dependable fiber ribbon quality checks focus on defined features. Design factors named in the patent include bond spacing, 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
Verify that intermittent bonds join adjacent subunits at the intended positions, with unbonded lengths between them. Review subunit alignment and gaps because shifts can affect 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 design checks, not universal production tolerances.
Confirm Fiber Identification And Ribbon Configuration
Confirm each fiber’s position using fiber color coding. 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. According to Prysmian, FlexRibbon enables high-density ribbon cable designs with smaller diameters and more effective 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. 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
Multiple ribbon fibers, often 12 at a time, are spliced in one operation through mass-fusion splicing. 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 matches its construction with building, aerial, and underground requirements.
Final Conclusions
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.
In this process, bonds are placed before the subunit coating cures. 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 ease cable packaging while keeping ribbons ready for efficient installation and splicing.