Optical Fibre Unit Anti-Adhesive Coating for Gel-Free Installation
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Solution Overview
Problem
Existing optical fibre units using gel-like materials face issues with gel leakage during installation, requiring additional cleaning and causing unpleasant contact for personnel, and the outer cladding is difficult to remove without damaging the protective coating.
Innovation Solution
The optical fibre unit employs an anti-adhesive coating composed of UV-curable resin, such as acrylate-based resin with reactive silicone groups, surrounded by a buffer tube with a radial intermediate space filled with a superabsorbent polymer, and a thermoplastic buffer tube with high tensile strength, allowing for easy application and removal without damaging the protective coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gel-like material is used to fill gaps between optical fibres, then moisture barrier function is improved, but gel leakage during installation occurs requiring additional cleaning
Solution Approach 1:
The patent removes the gel-like material from the buffer tube interior, extracting the problematic substance that causes leakage while maintaining the moisture barrier function through the anti-adhesive coating and buffer tube design
Solution Approach 2:
The anti-adhesive coating acts as an intermediary layer between the optical fibres and the buffer tube, preventing direct contact and adhesion while allowing the buffer tube to be removed without damaging the fibres
2Ease of operation
If anti-adhesive coating is applied to optical fibre, then buffer tube removal ease is improved, but coating application complexity increases
Solution Approach 1:
The patent replaces complex mechanical coating application systems with a UV-curable resin system that can be applied and cured through chemical photopolymerization, simplifying the overall application process
Solution Approach 2:
The anti-adhesive coating uses UV-curable resin that transitions from liquid to solid state through UV irradiation, changing the physical parameter of the coating material to achieve both easy application and effective anti-adhesive properties
3Strength
If outer cladding is made adhesive for protective coating, then bonding strength is improved, but cladding removal difficulty increases
Solution Approach 1:
The patent segments the coating structure into distinct functional layers: protective coating for bonding, anti-adhesive coating for easy removal, and buffer tube for mechanical protection, allowing each layer to perform its specific function independently
Solution Approach 2:
Different regions of the coating structure have different adhesive properties: the protective coating has high adhesion to the cladding for strength, while the anti-adhesive coating has low adhesion for easy removal, creating localized quality variations
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 configuration reduces installation time by 20-30% and enables the outer cladding to be removed over a length of at least 100 cm without damaging the protective coating, while eliminating the need for gel-like materials and improving handling safety.
Implementation Method 1
an anti-adhesive coating which is at least partially bonded to the outer circumference of the protective coating
Implementation Method 2
the radial intermediate space is preferably provided with a material that will swell in the presence of water, such as a superabsorbent polymer
Data Source
Figure 1
AI summary
The present invention relates to an optical fibre unit comprising at least one optical fibre, which optical fibre is provided with a protective coating, and an anti-adhesive coating which surrounds the protective coating and which is at least partially bonded thereto, which anti-adhesive coating is surrounded by a buffer tube. The present invention also relates to an optical cable comprising one or more of the aforesaid optical fibre units. The present invention further relates to a method for manufacturing an optical fibre unit.