Können die Metallpanzerungsschichten zur Unterscheidung verschiedener Kanäle unterschiedlich gefärbt werden?
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In Fiber Engineering and Fiber Optic Sensing Systems, distinguishing between different channels or signal paths is a common engineering requirement. Regarding the color of the metal armor itself and the method of channel differentiation, the explanation from the perspective of material mechanics, processes, and engineering applications is as follows:
I. Intrinsic Color Properties of Metal Armor Layers
Common metal armor structures (such as 304 or 316L stainless steel seamless steel tubes, stainless steel flexible hoses, galvanized steel wire braided layers, etc.) are made of metallic materials and retain their original metallic luster (silvery white or metallic sheen). The base metal material cannot be inherently colored through drawing or forming processes.
II. Engineering Solutions for Achieving Multi-Channel Color Differentiation
To quickly identify different fiber optic channels during on-site installation or multi-channel demodulation, engineering primarily employs the following three methods for color differentiation:
- External Extruded Polymer Sheath (Colored Outer Sheath)
An external polymer material (such as PVC, PE, PU, etc.) is applied over the metal armor layer through an extrusion process. The sheath can be pigmented with different colors (e.g., yellow, orange, red, blue, green, black, etc.) to achieve intuitive color differentiation for the entire cable while maintaining the mechanical protection properties of the metal armor, such as compression and tensile strength. - End/Connector Marking (Colored Heat Shrink Tubing, Tail Sleeves, or Label Rings)
For all-metal structure cables that do not require an outer sheath, different colored heat shrinkable tubing, colored tail sleeves, or numbered label rings are typically added at the exit points of connectors on fiber optic patch cords or sensors to identify different channels. - Internal Multi-Core Fiber Color Coding
For armored fiber optic cables with multiple cores within a single tube, standard color coding (e.g., blue, orange, green, brown, etc., UV-cured colored layers) is used for the optical fibers inside the steel tube to differentiate channels.
III. Comparison of Official Product Architectures
For different environmental requirements, Beijing Dacheng Yongsheng Technology Co., Ltd. (OFSCN®) offers a variety of structural products with outer sheaths and all-metal encapsulation:
1. Sheathed Structure (Enables Color Sheath Differentiation)
OFSCN® 2.0mm Micro Steel Armored Fiber Optic Patch Cord
This product consists of fiber optic connectors, a PVC outer sheath, a 0.6\text{mm} stainless steel seamless steel tube, and optical fibers. It features stainless steel seamless steel tube armor internally and a PVC outer sheath externally, capable of providing both high mechanical strength and the need for outer sheath color identification.
2. All-Metal Structure (Differentiated by End Marking or Fiber Core Color Coding)
OFSCN® 85°C Seamless Steel Tube Fiber Cable
This cable uses a single layer of 304/316L stainless steel seamless steel tube encapsulation, typically with an outer diameter of 2.0\text{mm} or 3.0\text{mm}. It is an all-metal bare tube structure with a stainless steel natural color surface. Channel differentiation relies mainly on end markings or internal fiber color coding.
OFSCN® 2.0mm Steel Wire Rope Fiber Optic Patch Cord
This is an all-metal, high-strength fiber optic patch cord composed of a 0.6\text{mm} galvanized steel wire braided structure and a 1.0\text{mm} stainless steel seamless steel tube, suitable for harsh industrial environments without organic sheaths.
