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Revealing the secrets of chemical fiber raw materials PBT and PET

Chemical fiber yarn is one of the indispensable materials in the modern brush-making industry. Among them, polybutylene terephthalate (PBT) and polyethylene terephthalate (PET) are common chemical fiber raw materials.



PBT is a polyester material with good physical properties and chemical stability. Its chemical structure contains repeating butylene terephthalate units.

This material can form a uniform and fine fiber structure during processing, giving the filament good elasticity and flexibility.

PBT fibers generally have excellent resistance to lodging, are not easily deformed, and have long service life and durability of filaments.

Therefore, PBT fiber is widely used in the brush industry, such as paint, polishing, toothbrushes, etc.



Next, let’s take a look at PET, a chemical fiber raw material.

Although PET and PBT are both polyester fibers, they have different properties. Due to its easy availability of raw materials and excellent performance, 

PET is the most common and widely used polyester material. Compared to PBT, PET contains ethylene terephthalate units in its chemical structure.

PET fiber is lightweight, heat-resistant, and not easily deformed.

In addition, PET fiber can also be compounded with other materials to increase the performance and functionality of the fiber. For example, combined with bio-based materials, degradable fibers can be created, which can contribute to environmental protection and sustainable development.

PET is easy to process and cheap, and is widely used in the brush industry.

In the filament brushing industry, filaments made of PET are easy to clean and dry quickly. The ester bonds in the molecules are highly resistant to oxidation and are not easily destroyed by detergents, soaps, and other products.



To sum up, PBT and PET, as common chemical fiber raw materials, play an important role in the brush-making industry. They have their unique features and advantages. I hope that through the above introduction, everyone will have a clearer understanding of chemical fiber raw materials (PBT and PET), and can better select and apply chemical fiber materials, bringing more convenience and comfort to your life.


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