Understanding the Benefits of Polybutylene Terephthalate in Optical Fiber Secondary Coating

In the world of optical fiber cables, protecting the delicate optical fibers is of utmost importance. While primary coating provides some mechanical strength, it often falls short of meeting the requirements for cabling. That’s where secondary coating comes into play. Polybutylene Terephthalate (PBT), a milky white or milky yellow translucent to opaque thermoplastic polyester, has emerged as the preferred material for optical fiber secondary coating. In this article, we will explore the benefits of using PBT in optical fiber secondary coating and how it contributes to the overall performance and reliability of optical fiber cables.

Enhanced Mechanical Protection:

The primary purpose of secondary coating is to provide additional mechanical protection to the fragile optical fibers. PBT offers excellent mechanical properties, including high tensile strength and impact resistance. Its ability to withstand compression and tension safeguards the optical fibers from potential damage during installation, handling, and long-term usage.

Superior Chemical Resistance:

Optical fiber cables may be exposed to various chemicals and environmental factors. Polybutylene Terephthalate exhibits exceptional chemical corrosion resistance, making it highly suitable for outdoor optical fiber cables. It protects the optical fibers from degradation caused by exposure to moisture, oils, solvents, and other harsh substances, ensuring long-term reliability.

Excellent Electrical Insulation Properties:

PBT possesses excellent electrical insulation properties, making it an ideal material for optical fiber secondary coating. It effectively prevents electrical interference and ensures the integrity of signal transmission within the optical fibers. This insulation quality is vital for maintaining the performance of optical fiber cables in diverse operating environments.

Low Moisture Absorption:

Moisture absorption can lead to signal loss and degradation in optical fibers. PBT has low moisture absorption properties, which helps maintain the optical fiber’s performance over an extended period. The low moisture absorption rate of PBT contributes to the overall stability and reliability of optical fiber cables, particularly in outdoor and humid environments.

Easy Molding and Processing:

PBT is known for its ease of molding and processing, which simplifies the manufacturing process of optical fiber secondary coating. It can be extruded easily onto the optical fiber, creating a protective layer with consistent thickness and precise dimensions. This ease of processing enhances productivity and reduces manufacturing costs.

Optical Fiber Length Management:

Secondary coating with PBT allows for the creation of excess length in optical fibers, which provides flexibility during cable installation and future maintenance. The excess length accommodates bending, routing, and termination without compromising the fiber’s integrity. PBT’s excellent mechanical properties enable the optical fibers to withstand the necessary handling and routing during installation.



ONE WORLD Is Committed To Providing Customers With Industleading High-Quality Wire And Cable Matenals And First-Classtechnical Services

You Can Request A Free Sample Of The Product You Are Interested Inwhich Means You Are Willing To Use Our Product For Production
We Only Use The Experimental Data You Are Willing To Feedback Andshare As The Verification Of Product Characteristics And Quality , Andthen Help Us To Establish A More Complete Quality Control System Toimprove Customers’ Trust And Purchase Intention , So Please Restassured
You Can Fill Out The Form On The Right To Request A Free Sample

Application Instructions
1 . The Customer Has An International Express Delivery Account Orvoluntarily Pays The Freight ( The Freight Can Be Returned In The Order )
2 . The Same Institution Can Only Apply For One Free Sample Of Thesame Product , And The Same Institution Can Apply For Up To Fivesamples Of Different Products For Free Within One Year
3 . The Sample Is Only For Wire And Cable Factory Customers , And Onlyfor Laboratory Personnel For Production Testing Or Research




Please Enter The Required Sample Specifications , Or Briefly Describe Theproject Requirements , We Will Recommend Samples For You

After submitting the form , the information you fill in may be  transmitted to the ONE WORLD background for further processed to determine product specification and address information with you. And may also contact you by telephone. Please read our Privacy Policy  For more details.

Thank you for your inquiry