What is polybutylene terephthalate fiber

Polybutylene Terephthalate (PBT) fiber is a type of synthetic fiber that is derived from the thermoplastic polymer known as Polybutylene Terephthalate.

PBT fiber is renowned for its exceptional combination of properties, making it a popular choice for various textile and industrial applications.

The production process for PBT fiber involves melt spinning, where the polymer is melted and extruded through fine spinnerets to form continuous filaments.

These filaments are then cooled and solidified to create the PBT fiber, which can be further processed into various forms, such as staple fibers, monofilaments, or multifilament yarns.

PBT fiber exhibits excellent mechanical strength, abrasion resistance, and dimensional stability, making it highly durable and long-lasting.

Additionally, PBT fiber possesses inherent resistance to chemicals, moisture, and UV radiation, making it suitable for outdoor and high-performance applications.

Its ability to maintain shape and resist wrinkling makes it an ideal choice for apparel, sportswear, and activewear.

In this introduction to polybutylene terephthalate fiber, we will explore the key properties and applications that have made this synthetic fiber a preferred material for a wide range of industries.

From fashion and outdoor gear to industrial textiles, PBT fiber continues to make its mark as a high-performance and versatile material.

What is polybutylene terephthalate fiber

In this comprehensive guide, we will explore the characteristics, production process, properties, applications, and advantages of Polybutylene Terephthalate fiber.

Understanding the diverse attributes of PBT fiber will enable designers, manufacturers, and consumers to appreciate its versatility and recognize its valuable contributions to modern textile technology. For more information visit here.

Characteristics of Polybutylene Terephthalate Fiber

  • Fiber Structure Polybutylene: Terephthalate fiber is a synthetic, semi-crystalline polymer composed of repeating units of butanediol and terephthalic acid. The unique chemical arrangement of PBT results in a strong, flexible, and resilient fiber suitable for various applications.

Processability: PBT fibers can be easily processed using various techniques, such as melt spinning, wet spinning, and dry spinning. The choice of spinning method depends on the desired characteristics of the fiber and the specific application.

  • Color Retention: PBT fibers exhibit excellent color retention properties, making them well-suited for applications that require vibrant and long-lasting colors, such as apparel and home textiles.
  • Softness and Comfort: PBT fibers are known for their softness and comfort, providing a pleasant tactile experience for wearers of clothing and textiles made from this material.

Production Process of Polybutylene Terephthalate Fiber

  • Polymerization: The production of PBT fiber begins with the polymerization of butanediol and terephthalic acid. These monomers undergo a condensation reaction to form polybutylene terephthalate, which is then processed into the final fiber form.
  • Melt Spinning: Melt spinning is the most common method used to produce PBT fiber. In this process, the polymer is melted and extruded through spinnerets to form continuous filaments. The filaments are then cooled and solidified to create the final PBT fiber.
  • Drawing: After the melt spinning process, the PBT filaments undergo drawing to orient the molecular chains and increase their strength and tensile properties.
  • Finishing: The PBT fibers are subjected to finishing treatments to enhance their performance, such as improving dyeability, adding water repellency, or imparting flame resistance.

Properties of Polybutylene Terephthalate Fiber

  • High Strength and Durability: PBT fibers exhibit high tensile strength, making them strong and durable, even in demanding applications.
  • Chemical Resistance: PBT fibers are resistant to chemicals, oils, and solvents, making them suitable for industrial applications where exposure to harsh environments is common.
  • Dimensional Stability: PBT fibers have excellent dimensional stability, retaining their shape and size even after extended use or exposure to varying temperatures and humidity levels.
  • Moisture Absorption: PBT fibers have low moisture absorption properties, ensuring that they remain dry and comfortable in humid conditions.
  • Flame Retardancy: PBT fibers can be modified to possess flame retardant properties, making them suitable for applications where fire resistance is essential.

Applications of Polybutylene Terephthalate Fiber

  • Apparel and Clothing: PBT fibers are used in the textile industry to create clothing items such as sportswear, swimwear, lingerie, and activewear. The fibers’ softness, strength, and color retention make them ideal for comfortable and long-lasting garments.
  • Home Textiles: In the home textile sector, PBT fibers are used to manufacture beddings, upholstery fabrics, curtains, and carpets. Their resilience and colorfastness make them well-suited for home décor applications.
  • Automotive: PBT fibers find applications in the automotive industry for producing interior fabrics and upholstery due to their durability, resistance to chemicals, and low moisture absorption.
  • Industrial: Uses PBT fibers are employed in industrial applications, such as conveyor belts, hoses, and ropes, thanks to their strength, dimensional stability, and chemical resistance.
  • Medical and Hygiene Products: PBT fibers are used in medical and hygiene products, such as wound dressings and disposable medical clothing, due to their softness and biocompatibility.

Advantages of Polybutylene Terephthalate Fiber

  • Versatility: PBT fibers offer a wide range of properties that can be tailored to suit specific applications, making them versatile and adaptable to various industries.
  • Durability and Longevity: The high strength and dimensional stability of PBT fibers contribute to their long-lasting performance, reducing the need for frequent replacements and improving product life cycles.
  • Resistance to Harsh Environments: PBT fibers’ resistance to chemicals, oils, and solvents make them suitable for applications in industrial and automotive settings where exposure to harsh environments is common.
  • Comfort and Softness: PBT fibers’ softness and comfort make them appealing for apparel and home textile applications, providing a pleasant tactile experience for consumers.
  • Colorfastness: The excellent color retention of PBT fibers ensures that products maintain vibrant colors and appearances over prolonged use.


Polybutylene Terephthalate (PBT) fiber is a versatile and high-performance synthetic material with a broad range of applications in various industries.

Its outstanding strength, chemical resistance, and dimensional stability, combined with ease of processing, make it a preferred choice for apparel, home textiles, automotive, and industrial uses.

The production process of PBT fiber involves polymerization, melt spinning, drawing, and finishing, resulting in a fiber that is durable, comfortable, and colorfast.

With its numerous advantages and diverse applications, PBT fiber continues to play a significant role in shaping modern textile technology and contributing to the creation of long-lasting and innovative products for consumers worldwide.



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