Flat Ripcords Are a Smart Choice for Micro Fibre Optic Cables

19 May, 2025

In the design of micro fibre optic cables, every component plays a role in performance, durability, and ease of handling. One such often-overlooked component is the ripcord—the element used to safely and easily open the cable sheath during installation.

Traditionally, ripcords are round, but flat ripcords are increasingly being adopted in modern micro cables due to several important advantages:

 

1.⁠ ⁠Prevention of Sheath Bulging

Round ripcords can create localized pressure points under the thin outer sheath, especially in compact micro cables. This pressure can cause visible bulging or unevenness along the cable surface. Flat ripcords distribute the load over a wider area, maintaining a smoother, uniform cable profile, which is critical when cables are blown into microducts or packed in tight trays.

 

2.⁠ ⁠Avoidance of External Ridges and Surface Marks

Round ripcords can press against the sheath from the inside, leaving ridges or impressions that can affect both aesthetics and mechanical handling—particularly during pulling or bending. Flat ripcords lay flush against the sheath, eliminating pressure lines or markings and ensuring the cable remains sleek and round for optimal installation performance.

 

3.⁠ ⁠Easier Cable Blowing and Installation

Micro cables are often installed via air-blowing through ducts. A smooth, ridge-free sheath (enabled by flat ripcords) reduces friction and resistance during installation, enhancing blow distance and speed while reducing strain on the cable and duct.

 

4.⁠ ⁠Reduced Risk of Sheath Damage During Use

Localized bulges or ridges caused by round ripcords may thin out the sheath wall in certain spots, increasing the risk of nicks, abrasions, or tearing. Flat ripcords help preserve the integrity and thickness of the sheath, improving mechanical durability.

 

5.⁠ ⁠Improved Cable Aesthetics and Brand Perception

While functionality is key, a smooth and professional-looking cable also boosts brand value and customer satisfaction. Flat ripcords contribute to a clean, high-quality finish that reflects precision engineering and attention to detail.

 

6.⁠ ⁠Enhanced Manufacturing Consistency

Flat ripcords offer predictable placement and better adherence during the cable extrusion process. This ensures consistent quality control and reduces defects during high-speed manufacturing of micro cables.

 

Conclusion

Flat ripcords may seem like a small design tweak, but in high-performance micro fibre optic cables, they deliver significant advantages—from improved sheath quality to easier installation and better long-term reliability. For manufacturers and users focused on miniaturization without compromising performance, flat ripcords are a simple upgrade with substantial payoff.