Tight Buffered Optical Fiber Compression Stripping
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Solution Overview
Problem
Conventional tight buffer layers on optical fibers are difficult to strip without damaging the protective coatings or breaking the fibers, making the process time-consuming and inconvenient, especially for lengths longer than an inch or two.
Innovation Solution
A tight buffer layer is formed and processed to facilitate easier stripping by compressing it during cooling, using materials like thermoplastic polymers, and applying slip agents, which allows for stress relaxation and separation from the underlying fiber, enabling removal with a force of approximately 13.3 Newtons or less per 15 millimeters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional tight buffer layers are formed with strong adhesion to the optical fiber, then the buffer layer provides effective protection and structural integrity, but the buffer layer becomes difficult to strip without damaging the protective coatings or breaking the fibers
Solution Approach 1:
A release layer is applied to the optical fiber before forming the buffer layer. This preliminary action creates a pre-planned separation interface that allows the buffer layer to be stripped easily later without damaging the underlying protective coatings or fiber, while still maintaining strong adhesion during normal use.
Solution Approach 2:
The release layer acts as an intermediary between the optical fiber and the buffer layer. It provides a controlled interface that enables easy separation when needed, resolving the contradiction between maintaining strong adhesion for protection and enabling easy stripping for installation and maintenance.
2Reliability
If the buffer layer is formed in intimate contact with the optical fiber, then the buffer layer provides tight protection and mechanical support, but multiple passes of stripping small segments are required to remove it without damage
Solution Approach 1:
The release layer is extracted or removed after the buffer layer is applied, leaving a clean separation interface. This allows the buffer layer to be stripped in a single continuous motion rather than requiring multiple passes of removing small segments, significantly reducing stripping time while maintaining protection effectiveness during cable installation and use.
3Stability of the object's composition
If the buffer layer material is highly adhesive to ensure buffer retention, then the buffer layer remains securely attached during handling and installation, but the stripping process becomes more difficult and time-consuming
Solution Approach 1:
The release layer is applied in advance to create a predetermined separation plane. This preliminary action ensures the buffer layer remains securely attached during handling and installation through strong adhesion to the release layer, while enabling rapid single-pass stripping by technicians, thereby improving installation efficiency without compromising buffer retention.
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 method allows for efficient and convenient stripping of the buffer layer from optical fibers, reducing the time and effort required, while minimizing damage to the underlying fiber and coatings.
Implementation Method 1
stress relaxation of the buffer layer material may facilitate release, loosening, or breaking away of the buffer layer from the underlying optical fiber
Implementation Method 2
the buffer layer may be compressed at any suitable temperature
Data Source
AI summary
Methods for forming tight buffered cables containing a strippable buffer layer are described. An optical fiber may be provided, and a buffer layer formed from a polymeric material may be extruded around the optical fiber. The buffer layer may be compressed while the polymeric material is cooling following extrusion. The compression may facilitate subsequent loosening of the buffer layer from the optical fiber based at least in part upon stress relaxation of the buffer layer.