Optical Fiber Ribbon Resin Silicon Tin Composition
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Solution Overview
Problem
Small-diameter optical fibers in optical fiber ribbons are susceptible to lateral pressure and transmission loss during winding and cable formation due to weak peeling resistance and adhesion issues with the ribbon resin, making it difficult to achieve both peeling resistance and single-fiber separability while maintaining low transmission loss.
Innovation Solution
The optical fiber ribbon features a connecting resin layer with a cured product of urethane (meth)acrylate containing silicon and tin, along with a silicone-based lubricant, which improves adhesion control and flexibility, allowing for enhanced peeling resistance and single-fiber separability, and is designed with a recess at connecting portions to facilitate deformation and reduce transmission loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If small-diameter optical fibers (220 μm or less) are used in optical fiber ribbons, then cable density and integration are improved, but lateral pressure resistance deteriorates and transmission loss increases during winding and cable formation
Solution Approach 1:
The patent uses a composite resin material containing both a silane-based polymer (for adhesion and flexibility) and a polyurethane-based polymer (for mechanical strength and lateral pressure resistance). This composite structure allows the ribbon to maintain both high integration density and sufficient mechanical protection for small-diameter fibers during cable formation and winding operations.
2Strength
If the ribbon resin adheres strongly to small-diameter optical fibers, then peeling resistance is improved, but single-fiber separability deteriorates
Solution Approach 1:
The patent carefully controls the chemical composition parameters of the resin, specifically the ratio of silane-based polymer to polyurethane-based polymer, and the silicon content (5-80000 ppm) and tin content (5-30000 ppm) on the resin surface. These parameter adjustments create an optimal balance where the resin adheres sufficiently to prevent peeling while allowing mechanical separation of individual fibers when needed.
3Volume of moving object
If the optical fiber ribbon is wound tightly during cable formation, then space utilization is improved, but transmission loss increases due to lateral pressure on small-diameter fibers
Solution Approach 1:
The patent employs a flexible resin coating that conformally surrounds and protects the small-diameter optical fibers. This flexible shell structure allows the ribbon to be wound tightly for high space utilization while maintaining sufficient cushioning to prevent excessive lateral pressure on the fibers, thereby minimizing transmission loss during cable formation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables optical fiber ribbons with improved peeling resistance, single-fiber separability, and reduced transmission loss, ensuring high lateral pressure characteristics and low loss during cable formation.
Implementation Method 1
a connecting resin layer containing a ribbon resin for coating and connecting the plurality of optical fibers... the ribbon resin contains a cured product of urethane (meth)acrylate, and an amount of silicon is 5 ppm or more and 80000 ppm or less and an amount of tin is 5 ppm or more and 30000 ppm or less at the surface of the connecting resin layer
Implementation Method 2
along with a silicone-based lubricant, which improves adhesion control and flexibility
Data Source
AI summary
An optical fiber ribbon comprises a plurality of optical fibers arranged in parallel and a connecting resin layer containing a ribbon resin for coating and connecting the plurality of optical fibers, wherein each of the plurality of optical fibers has an outer diameter of 220 μm or less; and the ribbon resin contains a cured product of urethane (meth)acrylate, and an amount of silicon is 5 ppm or more and 80000 ppm or less and an amount of tin is 5 ppm or more and 30000 ppm or less at the surface of the connecting resin layer.