Optical Fiber Ribbon Adhesive Viscosity for Low Transmission Loss
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Solution Overview
Problem
Existing optical fiber ribbons face issues with increased transmission loss due to adhesive resin swelling and reduced adhesive strength due to resin spread thinness.
Innovation Solution
The adhesive resin viscosity is maintained between 35 mPa·s and 147 mPa·s in the temperature range of 50° C. to 75° C. before curing, using urethane acrylate-based ultraviolet curing resin with monomer content between 10% to 30% to ensure appropriate viscosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If adhesive resin viscosity is low, then resin spreads evenly, but adhesive strength decreases and transmission loss increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the viscosity of the adhesive resin within the range of 35 mPa·s to 147 mPa·s at temperatures between 50°C and 75°C before curing. This viscosity control prevents the resin from spreading too thin, thereby maintaining adhesive strength while avoiding excessive swelling that would cause transmission loss. The parameter optimization resolves the contradiction between even spreading and maintaining sufficient resin thickness for adhesion.
2Strength
If adhesive resin viscosity is high, then resin maintains thickness and adhesive strength, but resin does not spread evenly
Solution Approach 1:
The patent resolves this contradiction by optimizing the viscosity parameter to a specific range (35-147 mPa·s at 50-75°C) that balances spreadability and thickness maintenance. Additionally, the patent employs temperature control during the adhesive application process, utilizing the temperature range of 50°C to 75°C to achieve the target viscosity. This controlled approach allows the resin to spread evenly while maintaining sufficient thickness for strong adhesion.
3Reliability
If adhesive resin swells, then resin fills gaps between fibers, but transmission loss increases
Solution Approach 1:
The patent addresses this contradiction by controlling the viscosity parameter to prevent excessive swelling. By maintaining viscosity within 35-147 mPa·s at 50-75°C, the resin achieves adequate gap filling for reliable coupling without excessive swelling that would cause transmission loss. The controlled viscosity ensures optimal balance between gap filling capability and transmission performance.
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
This approach reduces transmission loss and maintains adhesive strength by preventing resin swelling and thin spread, enhancing the optical fiber ribbon's performance.
Implementation Method 1
an adhesive resin coupling the plurality of optical fibers, in which the adhesive resin has viscosity higher than 35 mPa·s and lower than 147 mPa·s in at least a part of a temperature range from 50° C. to 75° C. before curing
Implementation Method 2
using urethane acrylate-based ultraviolet curing resin with monomer content between 10% to 30% to ensure appropriate viscosity
Data Source
AI summary
An optical fiber ribbon includes: a plurality of optical fibers; and an adhesive resin coupling the plurality of optical fibers, in which the adhesive resin has viscosity higher than 35 mPa·s and lower than 147 mPa·s in at least a part of a temperature range from 50° C. to 75° C. before curing.